High-pressure oil tank isolating valve for lightweight hybrid power vehicle

Abstract

According to the high-pressure oil tank isolating valve for the light-weight hybrid power vehicle, a second shell is arranged to be connected to an opening in the bottom of a first shell in a sealed mode, and an inner cavity of the second shell and a second cavity of the first shell are matched to contain a mechanical valve assembly; the connecting position of the second shell and the first shell is close to the middle of the mechanical sealing assembly, the installation stroke of the mechanical valve assembly is shorter, assembling is convenient, whether installation of the mechanical valve assembly is qualified or not is easier to confirm, meanwhile, during pressure relief, high-pressure gas acts on the inner wall of the second shell when the flow direction in the second shell is changed, and the sealing effect is better. And direct action on the joint of the two parts is avoided, and the falling risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-pressure oil tank isolation valves for light-weight hybrid power car, belong to automobile isolation valve technical field. BACKGROUND

[0002] With the increasingly serious automobile exhaust pollution, the current promulgated automobile exhaust emission regulations are more and more strict to the constraints of vehicle emissions into the atmosphere, but also promote the rapid development of automobile oil-electric hybrid technology, currently, hybrid vehicle (plug-in hybrid PHEV and range-extended hybrid REEV) has gradually become the most acceptable vehicle type for the public after several years of technology accumulation, hybrid vehicle not only has good fuel economy, but also can switch between engine operation and battery operation, which can well solve the anxiety caused by pure electric range. In this process, the oil tank isolation valve emerges as the times require.

[0003] The existing oil tank isolation valve is mostly composed of two chambers, each of which is provided with a sealing valve, and the two sealing valves cooperate to realize the pressure relief function. The lower chamber is mostly provided with a mounting port at the bottom, and the sealing valve is installed through the mounting port. After the sealing valve is installed, the plug is sealed and welded on the mounting port. The sealing effect is difficult to guarantee, and the inner diameter of the opening is limited. The sealing valve is complicated to assemble. In addition, when pressure relief is performed, high-pressure gas directly acts on the plug and then turns to the gas discharge port. After long-term use, the plug has the risk of falling off. SUMMARY

[0004] The utility model aims at providing a kind of high-pressure oil tank isolation valves for light-weight hybrid power car to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of high-pressure oil tank isolation valves for light-weight hybrid power car, the high-pressure oil tank isolation valve includes:

[0006] A first housing is formed with a first chamber and a second chamber in sequence from top to bottom, and the inner diameter decreases in sequence. The first chamber is used to accommodate a coil assembly and a armature assembly movably connected to the coil assembly and abutting on the bottom of the first chamber. An oil tank port is provided on the first chamber. An opening is formed in the bottom of the second chamber.

[0007] A second housing is formed with a cavity connected to a carbon canister. The second housing is sealingly connected to the first housing from the opening. A mechanical valve assembly is arranged in the second chamber. A pressure relief channel is formed between the mechanical valve assembly, the first housing and the armature assembly. One end of the mechanical sealing assembly is elastically connected to the second housing, and the other end abuts on the top of the second chamber and is sealingly connected to the armature assembly to block the pressure relief channel.

[0008] Further, the second shell is L-shaped, one end of which is connected to the carbon canister, and the other end of which is inserted into the first shell from the opening.

[0009] Further, a connecting end is formed in the second shell at an inflection point thereof along the axis of the second chamber and extends towards the first chamber, a gap is formed between the connecting end and the inner wall of the second shell, and the mechanical seal valve assembly is elastically connected to the connecting end.

[0010] Further, the pressure relief passage includes a first pressure relief passage formed between the mechanical valve assembly and the inner wall of the second chamber and a second pressure relief passage formed on the mechanical valve assembly.

[0011] Further, a flow-through hole is formed on the armature assembly, and the orthographic projection of the flow-through hole along the axis of the second chamber falls on the mechanical valve assembly and is located between the first pressure relief passage and the second pressure relief passage.

[0012] Further, the armature assembly includes an armature and a first sealing disc arranged at the end of the armature, and the mechanical valve assembly includes a second sealing disc movably arranged in the second chamber, the first sealing disc abuts against the bottom of the first chamber and the end face of the second sealing disc to block the first pressure relief passage and the second pressure relief passage.

[0013] Further, the first sealing disc is a convex structure having a first sealing surface and a second sealing surface, the end of the second sealing disc is concave to form a sealing groove, the second pressure relief passage is formed at the groove bottom of the sealing groove, the first sealing surface abuts against the bottom of the first chamber and the groove top of the sealing groove to block the first pressure relief passage, and the second sealing surface abuts against the groove bottom of the sealing groove to block the second pressure relief passage.

[0014] Further, a plurality of spacing strips are arranged on the inner wall of the top of the second chamber in a circumferential direction and are spaced apart, and the end face of the spacing strip abuts against the outer surface of the second sealing disc.

[0015] Further, a sealing member is arranged on the first sealing disc, the sealing member includes a first sealing ring arranged on the first sealing surface and a second sealing ring arranged on the second sealing surface, and the sealing ring includes an outer sealing lip and an inner sealing lip which abut against the bottom of the first chamber and the groove top of the sealing groove, respectively.

[0016] Further, the diameter of the second sealing surface is smaller than the diameter of the sealing groove.

[0017] The utility model discloses the beneficial effect lies in: the application is through setting up the second casing sealed connection in the opening on the first casing bottom, utilizes the inner chamber of second casing and the second chamber cooperation of first casing and holds the mechanical valve assembly, and the connecting place of second casing and first casing is close to the middle part of mechanical seal assembly, and the mechanical valve assembly installation stroke is shorter, and it is convenient to assemble and is easier to confirm whether mechanical valve assembly installation is qualified, simultaneously, when pressure relief, the inner wall on the second casing when high pressure gas changes flow direction in the second casing, avoids direct action at the connecting place of both, reduces the risk of falling off.

[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the casing structure schematic diagram of high pressure oil tank isolation valve for light weight hybrid power car shown in an embodiment of the application;

[0020] Figure 2 It is Figure 1 It is the structure schematic diagram of the power-on state of high pressure oil tank isolation valve for light weight hybrid power car;

[0021] Figure 3 It is Figure 2 It is the enlarged structure schematic diagram of A part. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model is described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0023] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a particular orientation, a particular orientation and operation, and therefore cannot be understood as limiting the utility model.

[0024] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0025] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the indirect connection of intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.In addition, in the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.

[0026] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] Please refer to Figures 1 to 3 The high-pressure oil tank isolation valve for a lightweight hybrid power vehicle shown in an embodiment of the present application includes a first housing 10 and a second housing 20.

[0028] A first chamber 11 and a second chamber 12 are formed in the first housing 10, which are sequentially connected from top to bottom and have decreasing inner diameters. The first chamber 11 is used to accommodate a coil assembly 30 and a armature assembly 40 movably connected to the coil assembly 30 and abutting against the bottom of the first chamber 11. An oil tank port 13 is provided on the first chamber 11, and an opening is formed at the bottom of the second chamber 12. The oil tank port 13 is connected to an oil tank, and the armature assembly 40 abuts against the bottom of the first chamber 11. The coil assembly 30 is used to drive the armature assembly 40 to move in the direction of approaching or moving away from the first chamber 11, so as to connect or close the first chamber 11 and the second chamber 12, thereby performing pressure relief or sealing. This is a prior art and will not be described here.

[0029] A cavity 21 communicating with the carbon tank is formed in the second shell 20, the second shell 20 is sealingly connected to the first shell 10 from the opening, the mechanical valve assembly 50 is arranged in the second chamber 12, the mechanical valve assembly 50, the first shell 10 and the armature assembly 40 form a pressure relief channel, one end of the mechanical sealing assembly is elastically connected to the second shell 20, the other end abuts the top of the second chamber 12 and is sealingly connected with the armature assembly 40 to block the pressure relief channel. The sealing connection mode of the second shell 20 and the first shell 10 can be welding, threaded connection, etc., as long as the two can be connected and meet the sealing requirements, which is not limited here.

[0030] In an embodiment, the second shell 20 is L-shaped, one end is connected to the carbon tank, and the other end is inserted into the first shell 10 from the opening. The inner wall of the corner of the L-shaped second shell 20 is arc-shaped, which is beneficial to change the flow direction of high-pressure gas and reduce the direct impact of high-pressure gas on the second shell 20 when pressure relief.

[0031] In an embodiment, a second shell 22 is formed in the second shell 20 at the inflection point along the axis direction of the second chamber 12 towards the first chamber 11, a gap is formed between the second shell 22 and the inner wall of the second shell 20, and the mechanical sealing valve assembly is elastically connected to the second shell 22. The second shell 22 is arranged at the middle position of the cavity of the second shell 20 and is composed of a plurality of connecting pieces. The interval between the connecting pieces and the gap between the second shell 22 and the inner wall of the second shell 20 together form a pressure relief flow channel between the second chamber 12 and the tank port 13 to improve the pressure relief effect.

[0032] In an embodiment, the pressure relief channel includes a first pressure relief channel 15 formed between the mechanical valve assembly 50 and the inner wall of the second chamber 12 and a second pressure relief channel 511 formed on the mechanical valve assembly 50. When the armature assembly 40 is away from the bottom of the first chamber 11, the first pressure relief channel and the second pressure relief channel 511 simultaneously communicate the first chamber 11 and the second chamber 12, and pressure relief is carried out through double channels, effectively improving the pressure relief effect.

[0033] In an embodiment, the armature assembly 40 has a flow-through hole 411, the orthographic projection of the flow-through hole 411 in the axis direction of the second chamber 12 falls on the mechanical valve assembly 50 and is located between the first pressure relief channel 15 and the second pressure relief channel 511. When the coil assembly 30 is de-energized and the tank port 13 is in high-pressure working condition, high-pressure gas can act on the mechanical valve assembly 50 through the flow-through hole 411 to drive the mechanical valve assembly 50 to move away from the armature assembly 40 to open the first pressure relief channel 15 and the second pressure relief channel 511, so as to realize rapid pressure relief.

[0034] In an embodiment, the armature assembly 40 comprises an armature and a first sealing disc 41 arranged at the end of the armature, the mechanical valve assembly 50 comprises a mechanical valve assembly 51 movably arranged in the second chamber 12, the first sealing disc 41 abuts on the bottom of the first chamber 11 and the end face of the mechanical valve assembly 51 to block the first pressure relief passage 15 and the second pressure relief passage 511. The armature is movably arranged in the coil assembly 30 and driven to move the first valve disc by the coil assembly 30, a spring 42 is sleeved on the armature, and the two ends of the spring 42 are connected with the first valve disc and the coil assembly 30 respectively. When the coil assembly 30 is powered off and the second shell 20 is under high pressure, the high-pressure gas can act on the first sealing disc 41 to drive the first sealing disc 41 to move away from the bottom of the first chamber 11, thereby opening the first pressure relief passage 15 and the second pressure relief passage 511 for pressure relief.

[0035] The diameter of the first valve disc is smaller than the inner diameter of the first chamber 11, and the pressure relief can be performed between the second valve disc and the inner wall of the first chamber 11 during pressure relief, effectively improving the pressure relief effect. The second valve disc is elastically connected to the second shell 22 by a mechanical spring 52, and the second valve disc is elastically abutted on the first valve disc, further improving the sealing effect between the two, and at the same time, when the high-pressure gas acts on the second valve disc, the second valve disc compresses the mechanical spring 52 to open the first pressure relief passage 15 and the second pressure relief passage 511, realizing rapid pressure relief.

[0036] In an embodiment, the first sealing disc 41 is a convex structure having a first sealing surface and a second sealing surface, the end of the mechanical valve assembly 51 is concave to form a sealing groove, and the second pressure relief passage 511 is formed at the groove bottom of the sealing groove. The first sealing surface is sealingly abutted on the bottom of the first chamber 11 and the groove top of the sealing groove to block the first pressure relief passage 15, and the second sealing surface is sealingly abutted on the groove bottom of the sealing groove to block the second pressure relief passage 511. By arranging the first sealing surface and the second sealing surface with a height difference, the sealing strength of the first pressure relief passage 15 and the second pressure relief passage 511 can be adjusted as needed.

[0037] In an embodiment, the diameter of the second sealing surface is smaller than the diameter of the sealing groove. The part of the convex structure extending into the sealing groove forms a gap between the inner wall of the sealing groove, which can form a larger force application surface when the high-pressure gas of the oil tank port 13 is pressed to the mechanical valve assembly 51, facilitating the movement of the mechanical valve assembly 51 towards the bottom of the second chamber 12, thereby opening the first pressure relief passage 15 and the second pressure relief passage 511 for pressure relief.

[0038] In an embodiment, a plurality of spacing strips 14 are arranged on the inner wall of the top of the second chamber 12 in a circumferential direction, and the end surface of the spacing strip 14 is in abutting connection with the outer surface of the mechanical valve assembly 51. The cross section of the mechanical valve assembly 51 is in a convex structure, and the upper surface of the end of the mechanical valve assembly 51 with a larger diameter is in abutting connection with the bottom surface of the spacing strip 14 away from the first chamber 11, so as to cooperate with the mechanical spring 52 to abut the mechanical valve assembly 51 on the top of the second chamber 12, and the outer wall of the end of the mechanical valve assembly 51 with a smaller diameter is in abutting connection with the end surface of the spacing strip 14 in the radial direction of the second chamber 12, so as to guide the moving direction of the mechanical valve assembly 51, so as to realize the accurate abutting connection between the mechanical valve assembly 51 and the first sealing disc 41, and ensure the sealing effect of the first pressure relief channel 15 and the second pressure relief channel 511. The top surface of the spacing strip 14 on the side close to the first chamber 11 is not coplanar with the bottom of the first chamber 11 and is located in the second chamber 12, so that when the second shell 20 is subjected to high pressure, the force exerted by the high-pressure gas on the force surface of the first sealing disc 41 is larger, and the first sealing disc 41 is driven to move. The communication hole for communicating the first pressure relief channel 15 and the second chamber 12 is arranged on the end of the mechanical valve assembly 51 with a smaller diameter, and the second pressure relief channel 511 is arranged along the axis direction of the end of the mechanical valve assembly 51 with a smaller diameter, so as to facilitate the confluence of the first pressure relief channel 15 and the second pressure relief channel 511 into the second chamber 12.

[0039] In an embodiment, the first sealing disc 41 is provided with a sealing element, which includes a first sealing ring 412 arranged on the first sealing surface and a second sealing ring 413 arranged on the second sealing surface, and the sealing ring includes an outer sealing lip and an inner sealing lip in abutting connection with the bottom of the first chamber 11 and the top of the sealing groove, respectively. The sealing lip can be compressed and deformed to form a larger sealing surface contact surface when the first sealing disc 41 is in abutting connection with the bottom of the first chamber 11 and the top of the sealing groove, so as to improve the sealing effect. Of course, in other embodiments, two independent sealing rings in abutting connection with the bottom of the first chamber 11 and the top of the sealing groove can also be arranged on the first sealing surface.

[0040] The second shell is sealingly connected to the opening in the bottom of the first shell, the inner cavity of the second shell is matched with the second chamber of the first shell to accommodate the mechanical valve assembly, the connection between the second shell and the first shell is close to the middle part of the mechanical sealing assembly, the installation stroke of the mechanical valve assembly is shorter, the assembly is facilitated and it is easier to confirm whether the installation of the mechanical valve assembly is qualified, and meanwhile, when pressure relief, the high-pressure gas acts on the inner wall of the second shell when changing the flow direction in the second shell, thereby avoiding direct action on the connection between the two, and reducing the risk of falling off.

[0041] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered as within the scope of the present disclosure.

[0042] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it shall not be understood as a limitation on the scope of the present application patent. It should be pointed out that, for ordinary skilled persons in the art, under the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A lightweight high-pressure fuel tank isolation valve for hybrid vehicles, characterized in that, The high-pressure oil tank isolation valve comprises: a first shell, in which a first chamber and a second chamber are formed in sequence from top to bottom and in sequence with decreasing inner diameters, the first chamber is used for accommodating a coil assembly and a armature assembly movably connected to the coil assembly and abutting against the bottom of the first chamber, an oil tank port is arranged on the first chamber, and an opening is formed in the bottom of the second chamber; a second shell, in which a cavity is formed in communication with a carbon tank, the second shell is sealingly connected to the first shell from the opening, a mechanical valve assembly is arranged in the second chamber, a pressure relief channel is formed between the mechanical valve assembly, the first shell and the armature assembly, one end of the mechanical sealing assembly is elastically connected to the second shell, and the other end abuts against the top of the second chamber and is sealingly connected to the armature assembly to block the pressure relief channel.

2. The high-pressure oil tank isolation valve for a lightweight hybrid vehicle according to claim 1, characterized by The second shell is L-shaped, one end of which is connected to the carbon tank, and the other end is inserted into the first shell from the opening.

3. The high-pressure oil tank isolation valve for a lightweight hybrid vehicle according to claim 2, characterized by A connecting end is formed in the second shell at an inflection point and extends along the axis direction of the second chamber towards the first chamber, a gap is formed between the connecting end and the inner wall of the second shell, and the mechanical sealing valve assembly is elastically connected to the connecting end.

4. The high-pressure oil tank isolation valve for a lightweight hybrid vehicle according to claim 1, characterized by The pressure relief channel comprises a first pressure relief channel formed between the mechanical valve assembly and the inner wall of the second chamber and a second pressure relief channel formed on the mechanical valve assembly.

5. The high-pressure tank isolation valve for a lightweight hybrid vehicle according to claim 4, characterized by A flow-through hole is formed on the armature assembly, and the orthographic projection of the flow-through hole in the axis direction of the second chamber falls on the mechanical valve assembly and is located between the first pressure relief channel and the second pressure relief channel.

6. The high-pressure tank isolation valve for a lightweight hybrid vehicle according to claim 5, characterized by The armature assembly comprises an armature and a first sealing disc arranged at the end of the armature, the mechanical valve assembly comprises a second sealing disc movably arranged in the second chamber, and the first sealing disc abuts against the bottom of the first chamber and the end face of the second sealing disc to block the first pressure relief channel and the second pressure relief channel.

7. The high-pressure tank isolation valve for a lightweight hybrid vehicle according to claim 6, characterized by The first sealing disc is a convex structure with a first sealing surface and a second sealing surface, the end of the second sealing disc is concave to form a sealing groove, the second pressure relief channel is formed in the groove bottom of the sealing groove, the first sealing surface sealingly abuts against the bottom of the first chamber and the groove top of the sealing groove to block the first pressure relief channel, and the second sealing surface sealingly abuts against the groove bottom of the sealing groove to block the second pressure relief channel.

8. The high-pressure oil tank isolation valve for a lightweight hybrid vehicle according to claim 6, characterized by A plurality of spacing strips are arranged on the inner wall of the top of the second chamber and spaced apart in the circumferential direction, and the end face of the spacing strip abuttingly connects to the outer surface of the second sealing disc.

9. The high-pressure tank isolation valve for a lightweight hybrid vehicle according to claim 7, characterized by A sealing member is arranged on the first sealing disc, the sealing member comprises a first sealing ring arranged on the first sealing surface and a second sealing ring arranged on the second sealing surface, and the sealing ring comprises an outer sealing lip and an inner sealing lip which respectively abut against the bottom of the first chamber and the groove top of the sealing groove.

10. The high-pressure tank isolation valve for a lightweight hybrid vehicle according to claim 7, characterized by The diameter of the second sealing surface is smaller than the diameter of the sealing groove.

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