CN108988164B - Sealing structure for top cover of overhead high-voltage equipment box of motor train unit - Google Patents
Sealing structure for top cover of overhead high-voltage equipment box of motor train unit Download PDFInfo
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- CN108988164B CN108988164B CN201811067939.4A CN201811067939A CN108988164B CN 108988164 B CN108988164 B CN 108988164B CN 201811067939 A CN201811067939 A CN 201811067939A CN 108988164 B CN108988164 B CN 108988164B
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- top cover
- sealing
- box body
- sealing strip
- strip
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gasket Seals (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a top cover sealing structure of a high-voltage equipment box arranged on top of a motor train unit, wherein the high-voltage equipment box comprises a box body, a top cover is arranged on the box body, a double-layer sealing structure is adopted between the top cover and the box body, sealing rubber strips are bonded on the box body and the top cover respectively, each sealing rubber strip comprises a first sealing strip and a second sealing strip, the part near the edge of the top cover is of a step-shaped structure and comprises a first step and a second step higher than the first step from outside to inside, the first sealing strip is positioned between the first step and the box body, and the second sealing strip is positioned between the second step and the box body. The invention has stable sealing structure, and outside water molecules can not enter the box body when the vehicle runs at high speed. The box body is isolated from the external environment, so that the normal work of the electric elements in the box body is ensured, the rigidity is ensured, meanwhile, the requirement of lightweight design is realized to the maximum extent, and the requirement of the running of the high-speed motor train unit can be met.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a top cover sealing structure of a motor train unit overhead high-voltage equipment box.
Background
In view of the limited space available at the bottom of the vehicle body of rail vehicles, more and more high-voltage equipment racks are used in overhead construction, i.e. arranged on the top of the vehicle body. This also causes problems, and a general high-voltage equipment box has a structure of a box body and a top cover, and the top cover is fastened to the box body by bolts. At present, after the top cover of the existing structure is fastened by bolts, the fastening part and the non-fastening part of a product have warping deformation, so that the prepressing amount of a sealing strip at the non-fastening position is reduced, and the problem of untight sealing caused by water inflow in the box body due to poor sealing of the top cover and the box body is solved. The sealing structure adopted by the existing structure is only single-layer sealing, and when a vehicle runs at a high speed, external water molecules can possibly enter the box body from a single-layer sealing gap under high-speed airflow, so that the normal work of electrical equipment in the box body is influenced, and even running risks are brought. Meanwhile, along with the requirement of light weight of the vehicle, the weight of the electric box needs to be reduced as much as possible; in addition, the top of the car body must be maintained to be able to bear the weight of 4 people at the maximum, and the electric box needs to have enough strength. In view of this, it is necessary to design a top cover structure with stable sealing structure, sufficient strength and light weight to meet the requirement of high-speed motor train unit operation, so as to isolate the external environment of the box body and ensure the normal operation of the electrical components in the box body.
In the prior art, utility model with application number CN201720094971.6 discloses a fixed case lid of high-voltage equipment case, and the case lid includes top cap and frame to be formed with the lid of a rectangle on the top cap and close the region, in this utility model the top cap in fact be the box body part, what the important introduction was the fixing device on the frame, and do not describe top cap and seal structure. The invention with the application number of CN201510109052.7 discloses a high-voltage equipment box structure, which comprises a box body and a top cover, wherein the top cover and the box body are in sealed connection, but the specific structure and the specific sealing structure of the top cover are not mentioned.
Disclosure of Invention
The invention aims to provide a sealing structure of a top cover of a motor train unit overhead high-voltage equipment box, which can solve the problem of poor sealing.
The technical scheme of the invention is as follows: a sealing structure for a top cover of a high-voltage equipment box arranged on top of a motor train unit comprises a box body, wherein the top cover is arranged on the box body, a double-layer sealing structure is adopted between the top cover and the box body, sealing rubber strips are bonded on the box body and the top cover respectively, and each sealing rubber strip comprises a first sealing strip and a second sealing strip; the part near the edge of the top cover is of a step-shaped structure and comprises a first step and a second step higher than the first step from outside to inside, the first sealing strip is positioned between the first step and the box body, and the second sealing strip is positioned between the second step and the box body.
The peripheral edge of the top cover is also provided with a handle.
The upper end of the first sealing strip is bonded on the top cover, the lower end of the second sealing strip is bonded on the box body, and the double-layer sealing structure formed by the first sealing strip and the second sealing strip is an upper and lower sawtooth meshing structure.
The top cover and the box body are connected through bolts in a fastening mode, and metal reinforcing metal plates are embedded in the edges of the periphery of the top cover or bonded through structural adhesive.
The first sealing strip is located below the first-stage stepped portion of the top cover, the second sealing strip is located below the second-stage stepped portion of the top cover, a metal bulge used for limiting the deformation direction of the compressed sealing rubber strip is arranged on the box body beside the sealing rubber strip, a first metal bulge is arranged beside the inner side of the first sealing strip, and a second metal bulge is arranged beside the inner side of the second sealing strip.
The distance between the top surface of the metal bulge and the bottom surface of the top cover right above the metal bulge is 2-5 mm.
The height of the sealing rubber strip is greater than the gap distance between the top cover and the box body at the position of the sealing rubber strip, the height H1 of the first sealing strip is greater than the distance H3 between the bottom surface of the first-stage step part of the top cover and the top of the box body, and the height H2 of the second sealing strip is greater than the distance H4 between the bottom surface of the second-stage step part of the top cover and the top of the box body.
H1 is more than or equal to 1.3 times of H3, and H2 is more than or equal to 1.3 times of H4.
The top cover comprises a main body part, and the structure of the main body part of the top cover is a sandwich structure of upper glass fiber reinforced plastic, middle foam sandwich and lower glass fiber reinforced plastic; the sandwich structure has the advantages that the thickness of the upper layer of glass fiber reinforced plastic is 3mm, the middle foam sandwich adopts PET foam, the thickness is 15mm, and the thickness of the lower layer of glass fiber reinforced plastic is 3 mm.
The periphery of the top cover is provided with mounting interfaces, the positions of the mounting interfaces and the sealing area on the periphery of the top cover adopt a solid structure, the solid structure adopts a pure glass fiber reinforced plastic structure, and the thickness of the solid structure part is more than or equal to 10 mm.
The edge of the top cover is reinforced by the metal plate, so that the deformation of the sealing position of a product after the bolt is fastened is prevented, and the sealing effect is ensured. The main body material of the top cover adopts a sandwich composite material structure with foam sandwich, the sealing structure is stable, and external water molecules cannot enter the box body when the vehicle runs at high speed. The box body is isolated from the external environment, so that the normal work of the electric elements in the box body is ensured, the rigidity is ensured, meanwhile, the requirement of lightweight design is realized to the maximum extent, and the requirement of the running of the high-speed motor train unit can be met. The edge of the top cover adopts a solid structure, so that the installation strength of the product is ensured to the maximum extent. The top cover is provided with the streamline handle, so that the product can be conveniently detached and carried, and meanwhile, the running resistance of the vehicle can be effectively reduced.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at I;
FIG. 5 is a partial enlarged view of the portion II in FIG. 3 (a material structure of the main body portion of the top cover);
in the figure: 1-box body, 2-top cover, 3-reinforced sheet metal, 4-handle, 5-upper layer glass fiber reinforced plastic, 6-PET foam, 7-lower layer glass fiber reinforced plastic, 21-first sealing strip, 22-second sealing strip, 23-first metal bulge, and 24-second metal bulge; h3-the distance between the bottom of the first step part of the top cover and the middle of the top of the box body, H4-the distance between the bottom of the second step part of the top cover and the middle of the top of the box body, H5-the distance between the top of the metal protrusion and the bottom of the top cover right above the metal protrusion.
Detailed Description
Referring to fig. 1 to 5, a sealing structure of a top cover of an overhead high-voltage equipment box of a motor train unit is characterized in that a double-layer sealing structure is adopted between a top cover 2 and a box body 1, a metal reinforcing metal plate 3 and a streamline handle 4 are arranged on the periphery of the top cover 2, sealing rubber strips are bonded on the box body 1 and the top cover 2 respectively, each sealing rubber strip comprises a first sealing strip 21 and a second sealing strip 22, the first sealing strip 21 is bonded on the top cover, and the second sealing strip 22 is bonded on the box body.
As shown in fig. 4, a first sealing strip 21 and a second sealing strip 22 are adopted between the top cover 2 and the box body 1 to form a double-layer sealing structure, and when the first sealing strip 21 fails, the second sealing strip 22 can still realize a sealing function, so that a sealing effect is ensured. In addition, when the train runs at high speed, the double-layer sealing structure can prevent moisture from entering the box body under the pressure of high-speed airflow.
As shown in figure 4, the first sealing strip 21 is bonded with the top cover 2, the second sealing strip 22 is bonded with the box body 1, the double-layer sealing layout is of an upper and lower sawtooth meshing structure, the whole sealing is more comprehensive and tighter, and the sealing effect can be ensured.
As shown in fig. 4, the structural cross-sectional shape of the whole sealing position (the part near the top cover edge) of the top cover 2 is in a step shape, the part near the top cover edge comprises a second step, the first step near the outer side is lower than the second step near the inner side, the first sealing strip is positioned below the first step part of the top cover, and the second sealing strip is positioned below the second step part of the top cover.
As shown in FIG. 4, a metal bulge is added beside the sealing rubber strip to limit the deformation direction of the compressed sealing strip and ensure the sealing effect. A first metal bulge 23 is arranged beside the inner side of the first sealing strip 21, a second metal bulge 24 is arranged beside the inner side of the second sealing strip 22, the metal bulges can limit the deformation direction of the compressed rubber sealing strip, so that the sealing strip deforms towards one side with a narrow space, and the deformed rubber can be extruded into the narrow space, so that the whole sealing is more reliable.
As shown in FIG. 4, the heights of the first metal protrusion 23 and the second metal protrusion 24 are respectively lower than the designed installation height of the first step and the second step of the top cover, and the difference H5 is 2-5mm (i.e., H5 is the distance between the top surface of the metal protrusion and the bottom surface of the top cover right above the metal protrusion), so that the top cover 2 is ensured not to be propped by the first metal protrusion 23 and the second metal protrusion 24 after being installed, the rubber sealing strip is ensured to be compressed to a reasonable height, and sealing failure is prevented.
As shown in FIG. 4, the height of each sealing rubber strip is greater than the designed height of the gap between the top cover and the box body, the height H1 of the first sealing strip 21 (the length of the first sealing strip in the vertical direction) is greater than the designed height H3 between the top cover 2 and the box body 1 (H3 refers to the distance between the bottom surface of the first step part of the top cover and the top part of the box body), the height H2 of the second sealing strip 22 (the length of the second sealing strip in the vertical direction) is greater than the designed height H4 between the top cover 2 and the box body 1 (H4 refers to the distance between the bottom surface of the second step part of the top cover and the top part of the box body), and H1 is more preferably greater than or equal to 1.3 times H3, and H2 is greater than.
As shown in fig. 5, the main body of the top cover 2 is made of a polymer composite material sandwich structure of upper layer glass fiber reinforced plastic, middle foam sandwich and lower layer glass fiber reinforced plastic, so that the rigidity of the product structure can be greatly improved, the structural rigidity of the top cover 2 can be ensured, the weight of the top cover 2 can be reduced as much as possible, and the requirement of light weight is met. The sandwich structure is characterized in that the thickness of the upper layer of glass fiber reinforced plastic 5 is 3mm, the middle foam sandwich adopts PET foam 6, the thickness is 15mm, and the thickness of the lower layer of glass fiber reinforced plastic 7 is 3 mm.
As shown in fig. 4, the mounting interface positions and the sealing areas on the peripheral edge of the top cover 2 are of solid structures, that is, pure glass fiber reinforced plastics are adopted, so that the mounting structure strength of the product can be ensured to the maximum extent, after the bolt is fastened, the edge of the product is not cracked, the product is not easy to warp and deform, and the sealing effect is improved. The thickness of the solid structure part is more than or equal to 10 mm.
In addition, streamline handles are arranged at the peripheral edge of the top cover of the high-voltage equipment box, so that the top cover can be conveniently detached and carried during maintenance; meanwhile, the arrangement position of the handle is consistent with the running direction of the vehicle, so that the resistance of the handle to the running of the vehicle can be reduced to the maximum extent.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A sealing structure for a top cover of a high-voltage equipment box arranged on top of a motor train unit comprises a box body, wherein a top cover is arranged on the box body; the part near the edge of the top cover is of a step-shaped structure and comprises a first step and a second step higher than the first step from outside to inside, the first sealing strip is positioned between the first step and the box body, and the second sealing strip is positioned between the second step and the box body;
the upper end of the first sealing strip is bonded on the top cover, the lower end of the second sealing strip is bonded on the box body, and a double-layer sealing structure formed by the first sealing strip and the second sealing strip is an upper and lower sawtooth meshing structure;
the first sealing strip is positioned below the first-stage stepped part of the top cover, the second sealing strip is positioned below the second-stage stepped part of the top cover, a metal bulge for limiting the deformation direction of the compressed sealing rubber strip is arranged on the box body beside the sealing rubber strip, a first metal bulge is arranged beside the inner side of the first sealing strip, and a second metal bulge is arranged beside the inner side of the second sealing strip;
the height of the sealing rubber strip is greater than the gap distance between the top cover and the box body at the position of the sealing rubber strip, the height H1 of the first sealing strip is greater than the distance H3 between the bottom surface of the first-stage step part of the top cover and the top of the box body, and the height H2 of the second sealing strip is greater than the distance H4 between the bottom surface of the second-stage step part of the top cover and the top of the box body.
2. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein a handle is further provided at the peripheral edge of the top cover.
3. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein the top cover and the box body are connected through bolts in a fastening mode, and metal reinforcing metal plates are embedded in the peripheral edges of the top cover or bonded through structural adhesive.
4. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein the distance between the top surface of the metal protrusion and the bottom surface of the top cover right above the metal protrusion is 2-5 mm.
5. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein H1 is more than or equal to 1.3 times H3, and H2 is more than or equal to 1.3 times H4.
6. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein the top cover comprises a main body part, and the structure of the main body part of the top cover is a sandwich structure adopting upper layer glass fiber reinforced plastic, middle foam sandwich and lower layer glass fiber reinforced plastic; the sandwich structure has the advantages that the thickness of the upper layer of glass fiber reinforced plastic is 3mm, the middle foam sandwich adopts PET foam, the thickness is 15mm, and the thickness of the lower layer of glass fiber reinforced plastic is 3 mm.
7. The motor train unit overhead high-voltage equipment box top cover sealing structure as claimed in claim 1, wherein mounting interfaces are arranged on the peripheral edge of the top cover, the positions of the mounting interfaces and the sealing area on the peripheral edge of the top cover are of a solid structure, the solid structure is a pure glass fiber reinforced plastic structure, and the thickness of the solid structure part is larger than or equal to 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811067939.4A CN108988164B (en) | 2018-09-13 | 2018-09-13 | Sealing structure for top cover of overhead high-voltage equipment box of motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811067939.4A CN108988164B (en) | 2018-09-13 | 2018-09-13 | Sealing structure for top cover of overhead high-voltage equipment box of motor train unit |
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| Publication Number | Publication Date |
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| CN108988164A CN108988164A (en) | 2018-12-11 |
| CN108988164B true CN108988164B (en) | 2020-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110752522A (en) * | 2019-10-22 | 2020-02-04 | 株洲时代新材料科技股份有限公司 | Motor train unit overhead high-voltage equipment box top cover sealing structure and method |
| CN112202059B (en) * | 2020-10-23 | 2022-09-09 | 南京大全电气有限公司 | Waterproof type exchanges low-voltage switchgear |
| CN114770976A (en) * | 2022-04-25 | 2022-07-22 | 中车青岛四方车辆研究所有限公司 | High-pressure tank cover, high-pressure tank cover manufacturing method and high-pressure tank |
| CN115003091A (en) * | 2022-06-20 | 2022-09-02 | 中车青岛四方车辆研究所有限公司 | Sealing structure of equipment box on top of railway vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100933499B1 (en) * | 2009-09-11 | 2009-12-31 | 이호기술단(주) | Hermetically cover for isolated of transformer equipment |
| CN105140802A (en) * | 2014-05-29 | 2015-12-09 | 江苏华厦电力成套设备有限公司 | Ventilation device for outdoor switch |
| CN104716591B (en) * | 2015-03-12 | 2017-06-06 | 中车青岛四方机车车辆股份有限公司 | A kind of high-voltage equipment box of rail vehicle |
| CN204706592U (en) * | 2015-07-01 | 2015-10-14 | 惠州市瑞祺赛德动力电池箱制造有限公司 | The sealed waterproof device of a kind of automobile power cell casing and case lid |
| CN206293807U (en) * | 2017-01-05 | 2017-06-30 | 福建通用恒泰电气设备有限公司 | A kind of waterproof stretchable door of box-type substation |
| CN206558989U (en) * | 2017-03-27 | 2017-10-13 | 常州小糸今创交通设备有限公司 | Junction box's sealing structure under EMUs car |
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