Wire harness waterproof plug and fuel cell exhaust drainage solenoid valve

Abstract

The utility model provides a kind of wiring harness waterproof plug, the wiring harness waterproof plug is used to fuel cell exhaust drainage solenoid valve to realize the waterproof of fuel cell exhaust drainage solenoid valve, the wiring harness waterproof plug includes the plug rod extending along the axial direction, the first limiting portion that is outwardly convex from the plug rod middle portion along radial direction, the second limiting portion that is outwardly convex from the plug rod end along radial direction and is spaced apart from the first limiting portion along the axial direction, the plug rod middle portion is equipped with multiple wire holes for wiring harness to pass through, and the wire hole is disposed along the axial direction through.The utility model discloses fuel cell exhaust drainage solenoid valve by setting wiring harness waterproof plug, to be clamped along axial direction and radial direction and through-hole, avoid water leakage, ensure that fuel cell exhaust drainage solenoid valve can effectively waterproof under wading working condition, significantly improve the reliability, durability and comprehensive performance of product, meet the harsh application requirements of vehicle level.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to a waterproof plug for a wire harness and an exhaust and drainage electromagnetic valve for a fuel cell. Background Technology

[0002] Among current new energy technologies, hydrogen energy, as the ultimate clean energy source for the future, is increasingly playing a vital role. Fuel cell technology, as a clean and efficient energy conversion device, generates electricity through the chemical reaction of hydrogen and oxygen, which can be used in various fields of production and daily life. Its only byproduct is water, making it a clean and efficient technology. However, the application of fuel cell technology is not yet widespread, mainly due to numerous technical challenges and high manufacturing costs.

[0003] Among the components of a hydrogen fuel cell hydrogen supply system, the exhaust and drain valve installed at the bottom of the water-vapor separator is a crucial part, primarily responsible for draining water produced by the fuel cell system. The fuel cell exhaust and drain solenoid valve must meet stringent automotive-grade operating conditions. Not only must the operating environment temperature meet a minimum requirement of -40°C, but it must also withstand vehicle wading conditions, requiring the drain valve to be waterproof to prevent water ingress into water up to one meter deep for half an hour.

[0004] However, the waterproofing effect of existing exhaust and drain valves is insufficient to meet the requirements.

[0005] In view of this, it is necessary to improve the existing waterproof plugs for wire harnesses to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a waterproof plug for wire harnesses to solve the problem of poor waterproofing effect of existing exhaust and drainage solenoid valves.

[0007] To achieve the above objectives, this utility model provides a waterproof plug for a wire harness. The waterproof plug is used in a fuel cell exhaust and drainage solenoid valve to achieve waterproofing of the fuel cell exhaust and drainage solenoid valve. The waterproof plug includes a plug rod extending axially, a first limiting portion protruding radially outward from the middle of the plug rod, a second limiting portion spaced axially from the first limiting portion and protruding radially outward from the end of the plug rod, and at least two third limiting portions axially disposed between the first limiting portion and the second limiting portion. The middle of the plug rod is provided with a plurality of wire holes for the wire harness to pass through, the wire holes being axially through-holes, and the third limiting portions protruding radially outward from the plug rod.

[0008] As a further improvement of this utility model, the wire harness waterproof plug also includes at least two of the third limiting portions arranged axially at intervals.

[0009] As a further improvement of this utility model, the number of the third limiting parts is three.

[0010] As a further improvement of this utility model, the cross-sectional shape of the third limiting part along the circumferential direction is an arc, a trapezoid, or a triangle.

[0011] As a further improvement of this utility model, the waterproof plug for the wire harness is made of elastic rubber material.

[0012] As a further improvement of this utility model, the material of the wire harness waterproof plug is silicone rubber, fluororubber, or EPDM rubber.

[0013] This utility model also provides a fuel cell exhaust and drainage solenoid valve, which includes a housing, a valve body disposed in the housing, a wire harness waterproof plug and a wire harness as described above, a receiving cavity is formed in the housing, the valve body is received in the receiving cavity, a through hole communicating with the receiving cavity is provided on the housing, the wire harness waterproof plug is inserted into the through hole, and the wire harness waterproof plug is interference-fitted with the through hole.

[0014] As a further improvement of this utility model, the first limiting part is located outside the outer shell and abuts against the outer shell, and the second limiting part is located inside the outer shell and abuts against the outer shell.

[0015] As a further improvement of this utility model, the fuel cell exhaust drainage solenoid valve also includes a side heating element and a bottom heating element, both of which are disposed within the receiving cavity and abut against the valve body and the outer shell.

[0016] As a further improvement of this utility model, the third limiting part is located inside the through hole and abuts against the outer shell in the radial direction.

[0017] The beneficial effects of this utility model are as follows: The fuel cell exhaust and drainage solenoid valve of this utility model, by setting a waterproof plug for the wiring harness, locks the through hole along the axial and radial directions to prevent water leakage, ensuring that the fuel cell exhaust and drainage solenoid valve can effectively prevent water leakage under water conditions, significantly improving the reliability, durability and overall performance of the product, and meeting the stringent application requirements of automotive grade. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of the fuel cell exhaust and drainage solenoid valve of this utility model. Figure 2 This is a schematic diagram of the outer shell of the fuel cell exhaust and drainage solenoid valve of this utility model. Figure 3 This is a cross-sectional view of the fuel cell exhaust and drainage solenoid valve of this utility model from another direction. Figure 4 This is a schematic diagram of the structure of the second elastic plate of the fuel cell exhaust and drainage solenoid valve of this utility model; Figure 5 This is a schematic diagram of the waterproof plug for the wiring harness of the fuel cell exhaust and drainage solenoid valve of this utility model. Figure 6 This is a cross-sectional schematic diagram of the waterproof plug for the wiring harness of the fuel cell exhaust and drainage solenoid valve of this utility model. Figure 7 This is a partial cross-sectional structural schematic diagram of the fuel cell exhaust and drainage solenoid valve of this utility model. Figure 8 This is a structural schematic diagram of the wiring harness waterproof plug, side heating element, and bottom heating element of the fuel cell exhaust and drainage solenoid valve of this utility model. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figures 1 to 4As shown, the fuel cell exhaust and drainage solenoid valve 100 of this utility model includes a housing 1, a valve body 2, a side heating element 3, a limiting protrusion 4, a bottom heating element 5, a wiring harness waterproof plug 7, and a wiring harness 6.

[0023] The outer shell 1 is made of plastic material, which has relatively poor heat transfer properties, thus minimizing the transfer of external cold to the interior. Furthermore, the plastic outer shell 1 is not only lightweight and low-cost, but its low thermal conductivity also contributes to internal insulation.

[0024] The housing 1 has a receiving cavity 11, with a bottom wall 12 on one side and a side wall 13 on the other. The bottom wall 12 has an opening that exposes the receiving cavity 11. Such an opening facilitates the installation of the valve body 2, the side heating element 3, and the bottom heating element 5.

[0025] The valve body 2 is housed within the receiving cavity 11.

[0026] The side heating element 3 is located between the valve body 2 and the side wall 13.

[0027] The limiting protrusion 4 is located on the side wall 13, and there are multiple limiting protrusions 4 arranged side by side with intervals.

[0028] In this embodiment, by setting a limiting protrusion 4, the side heating element 3 is prevented from directly contacting the outer shell 1, thus reducing heat transfer between the two. The limiting protrusion 4, through tolerance control, ensures that the side heating element 3 fits tightly against the valve body 2, increasing the contact area between the two, improving heat transfer, and achieving the effect of rapid de-icing of the internal flow channel of the valve body 2.

[0029] The limiting protrusion 4 has a trapezoidal cross-section, with its upper base facing the side heating element 3, and its lower base integrally formed on the side wall 13. Setting the cross-section of the limiting protrusion 4 to a trapezoidal shape further reduces the contact area between the limiting protrusion 4 and the side heating element 3, further reducing heat transfer. Simultaneously, it increases the contact area between the limiting protrusion 4 and the outer shell 1, ensuring structural stability and preventing loosening or breakage during assembly, making it suitable for automotive-grade vibration environments.

[0030] One of the beveled edges of the cross-section of the limiting protrusion 4 is inclined toward the opening. This beveled edge facilitates the installation of the side heating element 3 and the bottom heating element 5 into the receiving cavity 11, reducing manual adjustment.

[0031] The number of limiting protrusions 4 is two, and the two limiting protrusions 4 can apply pressure symmetrically to ensure that the side heating element 3 is in close contact with the valve body 2. The spacing design further reduces the contact area, reduces heat loss, and improves support. In other embodiments, the number of limiting protrusions 4 can be more.

[0032] The outer casing 1 is provided with a first elastic element on the side wall 13, which abuts against the side wall 13 and the side heating element 3. The first elastic element can absorb assembly errors, ensure the tightness and consistency of the side heating element 3 and the valve body 2 in different products, solve the problem of poor heating consistency, and at the same time reduce the contact area between the outer casing 1 and the valve body 2, thereby reducing heat transfer.

[0033] The bottom heating element 5 is located between the bottom wall 12 and the valve body 2. The bottom heating element 5, together with the side heating element 3, can achieve heating at multiple locations, resulting in a better heating effect compared to a single heater.

[0034] The outer casing 1 is provided with a second elastic element 14 on the bottom wall 12, and the second elastic element 14 abuts against the bottom wall 12 and the bottom heating element 5. The second elastic element 14 can absorb assembly errors, ensure the consistent fit between the bottom heating element 5 and the valve body 2 in different products, solve the problem of poor heating consistency, and at the same time reduce the contact area between the outer casing 1 and the valve body 2, thereby reducing heat transfer.

[0035] like Figures 5 to 8 As shown, the wire harness waterproof plug 7 is used in the fuel cell exhaust and drainage solenoid valve 100 to achieve waterproofing of the fuel cell exhaust and drainage solenoid valve 100. The outer shell 1 has a through hole that communicates with the receiving cavity 11. The wire harness waterproof plug 7 is inserted into the through hole, and the wire harness waterproof plug 7 is interference-fitted with the through hole.

[0036] The wire harness waterproof plug 7 includes a plug rod 71 extending axially, a first limiting portion 72 protruding radially outward from the middle of the plug rod 71, a second limiting portion 73 spaced axially from the first limiting portion 72 and protruding radially outward from the end of the plug rod 71, and at least two third limiting portions 74 disposed axially between the first limiting portion 72 and the second limiting portion 73.

[0037] The first limiting part 72 is located outside the outer shell 1 and abuts against the outer shell 1, while the second limiting part 73 is located inside the outer shell 1 and abuts against the outer shell 1. In this embodiment, by providing the first limiting part 72 and the second limiting part 73, a two-layer sealing structure (outer and inner layers) is adopted to achieve reliable waterproofing, ensuring that neither external liquid nor gaseous media can pass through the waterproof plug area. That is, the first limiting part 72 and the second limiting part 73 achieve axial limiting of the wire harness waterproof plug 7.

[0038] In this embodiment, the first limiting part 72 has a guide bevel on the side away from the second limiting part 73. The guide bevel allows the first limiting part 72 to pass through the through hole to realize the installation of the wire harness waterproof plug 7.

[0039] The stopper 71 has a plurality of wire holes in the middle for the wire harness 6 to pass through, and the wire holes are arranged axially.

[0040] At least two of the third limiting portions 74 are axially spaced apart, and the third limiting portions 74 protrude radially outward from the plug rod 71. The third limiting portions 74 are located within the through hole and abut against the housing 1 radially. The third limiting portions 74 and the hole wall of the through hole of the housing 1 maintain a continuous radial abutment pressure. The multiple third limiting portions 74 form multiple sealing defenses. Even if one seal is slightly weakened due to long-term use or material aging, the remaining sealing points can still function effectively, greatly improving the reliability and durability of the seal.

[0041] In this embodiment, there are three third limiting parts 74. More may be provided in other embodiments.

[0042] The cross-sectional shape of the third limiting part 74 along the circumferential direction is an arc, a trapezoid, or a triangle.

[0043] The waterproof plug 7 for the wire harness is made of elastic rubber material. The material of the waterproof plug 7 can be silicone rubber, fluororubber, or EPDM rubber. The specific shape of the third limiting part 74 serves as a guide during insertion, facilitating assembly. Simultaneously, the elastic material of the third limiting part 74 can accommodate minute dimensional deviations in the hole, ensuring the stability of the interference fit.

[0044] The fuel cell exhaust and drainage solenoid valve 100 of this invention uses a limiting protrusion 4 to press the side heating element 3 against the valve body 2, thereby improving the heating of the valve body 2 and reducing the heat loss of the side heating element 3. A waterproof plug 7 for the wiring harness is used to secure the through hole axially and radially, preventing leakage. These structures work together to ensure that the fuel cell exhaust and drainage solenoid valve 100 can quickly defrost at -40℃ and effectively prevent water damage in wading conditions, significantly improving the product's reliability, durability, and overall performance, meeting the stringent requirements of automotive-grade applications.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A waterproof plug for a wire harness, said waterproof plug (7) being used in a fuel cell exhaust and drainage solenoid valve to achieve waterproofing of the fuel cell exhaust and drainage solenoid valve, characterized in that: The wire harness waterproof plug (7) includes a plug rod (71) extending axially, a first limiting part (72) protruding radially outward from the middle of the plug rod (71), a second limiting part (73) spaced axially from the first limiting part (72) and protruding radially outward from the end of the plug rod (71), and at least two third limiting parts (74) arranged axially between the first limiting part (72) and the second limiting part (73). The plug rod (71) has a plurality of wire holes for the wire harness to pass through in the middle, the wire holes being arranged axially through, and the third limiting parts (74) protruding radially outward from the plug rod (71).

2. The waterproof plug for wire harnesses according to claim 1, characterized in that: The wire harness waterproof plug (7) has at least two of the third limiting portions (74) spaced apart along the axial direction.

3. The waterproof plug for wire harnesses according to claim 2, characterized in that: The number of the third limiting part (74) is three.

4. The waterproof plug for wire harnesses according to claim 2, characterized in that: The cross-sectional shape of the third limiting part (74) along the circumferential direction is an arc, a trapezoid, or a triangle.

5. The waterproof plug for wire harnesses according to any one of claims 1-4, characterized in that: The waterproof plug (7) of the wire harness is made of elastic rubber material.

6. The waterproof plug for wire harnesses according to claim 5, characterized in that: The material of the wire harness waterproof plug (7) is silicone rubber, fluororubber, or EPDM rubber.

7. A fuel cell exhaust and drainage solenoid valve, characterized in that: The fuel cell exhaust and drainage solenoid valve (100) includes a housing (1), a valve body (2) disposed in the housing (1), a wire harness waterproof plug (7) and a wire harness (6) as described in any one of claims 1-6. A receiving cavity (11) is formed in the housing (1), and the valve body (2) is received in the receiving cavity (11). A through hole communicating with the receiving cavity (11) is provided on the housing (1). The wire harness waterproof plug (7) is inserted into the through hole, and the wire harness waterproof plug (7) is interference-fitted with the through hole.

8. The fuel cell exhaust and drainage solenoid valve according to claim 7, characterized in that: The first limiting part (72) is located outside the outer shell (1) and abuts against the outer shell (1), and the second limiting part (73) is located inside the outer shell (1) and abuts against the outer shell (1).

9. The fuel cell exhaust and drainage solenoid valve according to claim 8, characterized in that: The fuel cell exhaust and drainage solenoid valve (100) also includes a side heating element (3) and a bottom heating element (5), both of which are disposed in the receiving cavity (11) and abut against the valve body (2) and the outer shell (1).

10. The fuel cell exhaust and drainage solenoid valve according to claim 7, characterized in that: The third limiting part (74) is located inside the through hole and abuts against the outer shell (1) radially.

Images