An orvr valve

Abstract

The present application belongs to the technical field of oil station oil gas recovery equipment, and particularly relates to an ORVR valve; the valve comprises a valve body, a first valve core and a driving part; the valve body is provided with a refueling channel and an oil gas recovery channel; the first valve core is arranged at the oil gas recovery channel, and the driving part is arranged in the valve body and is in transmission connection with the first valve core. The ORVR valve can realize the opening / closure of the oil gas recovery channel according to the type of the automobile, so that it can be simultaneously applied to the refueling demand of the automobile with the ORVR system and the automobile without the ORVR system; when the automobile without the ORVR system is refueled, the oil gas recovery channel is opened, so that the vacuum pump in the refueling equipment can recover the oil gas in the oil tank, and the overflow of the oil gas is avoided; when the automobile with the ORVR system is refueled, the oil gas recovery channel is closed, so that the vacuum pump in the refueling equipment cannot suck the air outside to the oil storage tank, so as to avoid the generation of more oil gas and cause serious pollution problems.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas recovery equipment of gas station, and particularly relates to an ORVR valve. BACKGROUND

[0002] According to the regulations of "Light-duty Vehicle Emission Limit Values and Measurement Methods (China Phase VI)" (GB18352.6-2016), the emission of domestic fuel vehicles is required to reach the standard, and new requirements are proposed for the emission of the vehicle itself and the emission during refueling.

[0003] In order to make the emission of the vehicle during refueling reach the above standard, the newly produced vehicle needs to be equipped with an onboard refueling vapor recovery (ORVR) system, which can adsorb the oil gas generated by the temperature difference of the vehicle tank and other factors during refueling through the carbon canister of the ORVR system; and the ORVR system has a desorption function, which can desorb the adsorbed oil gas and send it into the internal combustion engine for combustion, recycling and reducing pollutant emission.

[0004] In order to make the carbon canister of the ORVR system adsorb the oil gas in the tank, the ORVR system needs to improve the original tank and pipeline, one of the methods is to reduce the diameter of the oil inlet pipe to realize liquid sealing during refueling, so that the carbon canister can adsorb the oil gas in the tank, and the oil gas cannot overflow from the refueling port.

[0005] At present, the refueling gun used in China is a secondary oil and gas recovery refueling gun meeting environmental protection requirements, which can adsorb the oil gas in the tank of the vehicle during refueling, and can be used for vehicles without ORVR system.

[0006] However, this type of gun is not suitable for vehicles with ORVR system; because of the influence of the liquid seal of the vehicle ORVR system, the vacuum pump in the refueling equipment cannot recover the oil gas in the vehicle, and during refueling, the gun will suck the air outside to the underground oil tank to form an equal volume of oil gas, which will pollute the environment and cause more serious pollution problems.

[0007] There are vehicles without ORVR system and vehicles with ORVR system in the society, if the existing secondary oil and gas recovery refueling gun is directly replaced by a gun suitable for ORVR system, the existing secondary oil and gas recovery refueling gun cannot be used, causing a large waste of resources, and at the same time, when refueling the vehicle without ORVR system, the oil gas will overflow, causing serious pollution problems.

[0008] If the oil gun applicable to the ORVR system is not replaced, serious pollution problems will be caused when refueling the vehicle with the ORVR system. Therefore, the technical problem to be solved by the technical personnel in the field is to invent a refueling device capable of adjusting the refueling mode of the secondary oil gas recovery refueling gun according to the type of the vehicle. SUMMARY

[0009] In order to solve the above problems existing in the prior art, the present application provides an ORVR valve to solve the technical problem that the secondary oil gas recovery refueling gun in the prior art cannot be simultaneously applied to the refueling demand of the vehicle with the ORVR system and the vehicle without the ORVR system.

[0010] The present application is specifically implemented by the following technical solutions:

[0011] An ORVR valve, comprising a valve body, a first valve core and a driving part;

[0012] The valve body is provided with a refueling channel and an oil gas recovery channel which are not communicated with each other;

[0013] The first valve core is movably arranged at the oil gas recovery channel, the driving part is arranged in the valve body, and the action end of the driving part is in transmission connection with the first valve core, for driving the first valve core to act to realize the opening / closure of the oil gas recovery channel.

[0014] In order to better realize the present application, the driving part comprises a diaphragm and a reset spring A in the above structure;

[0015] The valve body is provided with a negative pressure cavity, the oil gas recovery channel is communicated with the negative pressure cavity through a channel A, a slide hole is arranged directly below the negative pressure cavity, the slide hole is vertically staggered with the oil gas recovery channel, the shape of the slide hole matches the cross-sectional shape of the first valve core, and the first valve core is slidably arranged in the slide hole along the axis direction of the slide hole;

[0016] The edge of the diaphragm is connected and sealed with the edge of the negative pressure cavity, one end of the first valve core is connected with the middle part of the diaphragm, the reset spring A is arranged between the first valve core and the diaphragm, and the two ends of the reset spring A are respectively arranged on the diaphragm and the bottom wall of the negative pressure cavity.

[0017] In order to better realize the present application, the ORVR valve further comprises a sealing seat and a second valve core in the above structure;

[0018] The side of the valve body away from the negative pressure cavity is provided with a sink, and the oil gas recovery channel is communicated with the sink through a channel B;

[0019] The sealing seat is arranged at the slot of the sink, a middle part of the sealing seat is provided with a valve port, and the second valve core is movably arranged at the valve port, and the first valve core is in transmission connection with the second valve core.

[0020] When the diaphragm drives the first valve core to act to close the oil gas recovery channel, the first valve core will push the second valve core away from the valve port, so that the valve port is opened.

[0021] In order to better realize the present application, in the above structure, further optimization is made, the second valve core is provided with a clamping part at one end close to the first valve core, a reset spring B is arranged between the clamping part and the sealing seat, and two ends of the reset spring B are respectively arranged on the clamping part and the sealing seat.

[0022] In order to better realize the present application, in the above structure, further optimization is made, the sealing surface of the sealing seat is a slope, and a sealing ring is arranged on the sealing surface of the second valve core.

[0023] In order to better realize the present application, in the above structure, further optimization is made, a reset spring C is arranged between the first valve core and the sealing seat, and two ends of the reset spring C are respectively arranged on the first valve core and the sealing seat.

[0024] In order to better realize the present application, in the above structure, further optimization is made, the outer part of the valve body is provided with a protective sleeve.

[0025] In order to better realize the present application, in the above structure, further optimization is made, the oil outlet end of the valve body is provided with an oil gas extension pipe which is convenient for being inserted into the oil gun, and the outer side wall of the oil gas extension pipe is provided with a sealing ring.

[0026] In order to better realize the present application, in the above structure, further optimization is made, the outer side wall of the oil outlet end of the valve body is provided with external threads which are convenient for being connected with the oil gun, and the oil inlet end of the valve body is provided with a mounting hole, and the inner side wall of the mounting hole is provided with internal threads which are convenient for being connected with the oil pipe.

[0027] In order to better realize the present application, in the above structure, further optimization is made, the valve body is made of aluminum alloy.

[0028] In summary, the present application has the following technical effects:

[0029] The ORVR valve can realize the opening / closure of the oil gas recovery channel according to the type of the automobile, so that it can be simultaneously applied to the refueling demand of the automobile with the ORVR system and the automobile without the ORVR system; when the automobile without the ORVR system is refueled, the oil gas recovery channel is opened, so that the vacuum pump in the refueling equipment can recover the oil gas in the oil tank, to avoid the overflow of the oil gas; when the automobile with the ORVR system is refueled, the oil gas recovery channel is closed, so that the vacuum pump in the refueling equipment cannot suck the air outside into the oil tank, to avoid the generation of more oil gas and cause serious pollution problems. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, below the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 is a structure diagram of an oil outlet end of an ORVR valve of the present application;

[0032] Figure 2 is a structure diagram of an oil inlet end of an ORVR valve of the present application;

[0033] Figure 3 is a sectional view of an ORVR valve of the present application in which an oil gas recovery channel is in an open state;

[0034] Figure 4 is Figure 3 is a local enlarged view of part A in FIG. 7;

[0035] Figure 5 is a cooperation state diagram of a diaphragm and a first valve core in an ORVR valve of the present application;

[0036] Figure 6 is a cooperation state diagram of a sealing seat and a second valve core in an ORVR valve of the present application;

[0037] Figure 7 is a sectional view of an ORVR valve of the present application in which an oil gas recovery channel is in a closed state.

[0038] Reference signs:

[0039] 1, valve body; 11, refueling channel; 12, oil gas recovery channel; 13, negative pressure cavity; 14, sliding hole; 15, sink groove; 16, oil gas extension pipe; 17, mounting hole;

[0040] 2, first valve core;

[0041] 3, drive part; 31, diaphragm; 32, reset spring A;

[0042] 4, sealing seat;

[0043] 5, second valve core; 51, sealing ring;

[0044] 6, reset spring B;

[0045] 7, reset spring C;

[0046] 8, protective sleeve;

[0047] 91, channel A; 92, channel B. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Embodiment:

[0052] As shown in Figures 1 to 7

[0053] An ORVR valve comprising a valve body 1, a first valve core 2 and a drive part 3; wherein,

[0054] ​The valve body 1 is provided with a fueling channel 11 and an oil gas recovery channel 12 which are not communicated with each other;

[0055] The first valve core 2 is movably arranged at the oil gas recovery channel 12, the driving part 3 is arranged in the valve body 1, and the action end of the driving part 3 is in transmission connection with the first valve core 2, for driving the first valve core 2 to act to realize the opening / closing of the oil gas recovery channel 12.

[0056] The ORVR valve can realize the opening / closing of the oil gas recovery channel 12 according to the type of the automobile, so that it can be simultaneously applied to the fueling requirements of the automobile with the ORVR system and the automobile without the ORVR system; when fueling the automobile without the ORVR system, the oil gas recovery channel 12 is opened, so that the vacuum pump in the fueling equipment can recover the oil gas in the fuel tank, to avoid the overflow of the oil gas;

[0057] When fueling the automobile with the ORVR system, the oil gas recovery channel 12 is closed, so that the vacuum pump in the fueling equipment cannot suck the air outside into the oil storage tank, to avoid the generation of more oil gas to cause serious pollution problems.

[0058] It should be noted that the type of the automobile refers to the automobile with the ORVR system and the automobile without the ORVR system.

[0059] Preferably, the valve body 1 is made of light aluminum alloy, so that the ORVR valve is more portable and more convenient to use.

[0060] Preferably, the driving part 3 includes a diaphragm 31 and a reset spring A 32; wherein,

[0061] The valve body 1 is provided with a negative pressure cavity 13, the oil gas recovery channel 12 is communicated with the negative pressure cavity 13 through a channel A91, a slide hole 14 is arranged right below the negative pressure cavity 13, the slide hole 14 is vertically staggered with the oil gas recovery channel 12, the shape of the slide hole 14 matches the cross-sectional shape of the first valve core 2, and the first valve core 2 is slidably arranged in the slide hole 14 along the axis direction of the slide hole 14;

[0062] The edge of the diaphragm 31 is connected and sealed with the edge of the negative pressure cavity 13, one end of the first valve core 2 is connected with the middle part of the diaphragm 31, the reset spring A 32 is arranged between the first valve core 2 and the diaphragm 31, and the two ends of the reset spring A 32 are respectively arranged on the diaphragm 31 and the bottom wall of the negative pressure cavity 13;

[0063] When refueling the vehicle with the ORVR system, the negative pressure between the opening of the oil inlet pipeline of the oil tank and the fueling port of the fueling gun is formed due to the smaller diameter of the oil inlet pipeline of the oil tank, and the negative pressure is transmitted to the negative pressure cavity 13 through the oil vapor recovery channel 12 and the channel A91, so that the middle part of the diaphragm 31 is adsorbed and moves downward, at this time, the first valve core 2 is pushed downward by the diaphragm 31 and moves to block the oil vapor recovery channel 12, so that the oil vapor recovery channel 12 is in a closed state, and the vacuum pump in the fueling equipment cannot suck the air outside into the oil tank.

[0064] When the fueling is completed and the fueling gun is removed from the opening of the oil inlet pipeline by the staff, the negative pressure at the fueling port of the fueling gun disappears, and the diaphragm 31 returns to the initial position under the action of the reset spring A32, and the diaphragm 31 drives the first valve core 2 to move upward, so that the oil vapor recovery channel 12 is in an open state; in this state, the fueling gun can be used for fueling the vehicle without the ORVR system.

[0065] It should be noted that when the fueling gun is inserted into the opening of the oil inlet pipeline, the negative pressure between the opening of the oil inlet pipeline and the fueling port of the fueling gun gradually increases, and when the negative pressure is greater than the restoring force of the reset spring A32, the middle part of the diaphragm 31 will overcome the restoring force of the reset spring A32 and move downward, and at the same time drive the first valve core 2 to act.

[0066] Preferably, the diaphragm 31 is made of fluororubber, which has the characteristics of strong durability, so as to improve the service life of the ORVR valve.

[0067] Preferably, the ORVR valve further comprises a sealing seat 4 and a second valve core 5; wherein,

[0068] The valve body 1 is provided with a sink 15 on the side away from the negative pressure cavity 13, and the oil vapor recovery channel 12 is communicated with the sink 15 through a channel B92;

[0069] The sealing seat 4 is arranged at the slot of the sink 15, the middle part of the sealing seat 4 is provided with a valve port, the second valve core 5 is movably arranged at the valve port, and the first valve core 2 is in transmission connection with the second valve core 5;

[0070] When the diaphragm 31 drives the first valve core 2 to act and close the oil vapor recovery channel 12, the first valve core 2 will push the second valve core 5 away from the valve port, so that the valve port is opened, and the air outside will enter the sink 15 through the valve port, so that the negative pressure between the opening of the oil inlet pipeline and the fueling port of the fueling gun is maintained within a fixed range, so as to avoid the problem that the negative pressure between the opening of the oil inlet pipeline and the fueling port of the fueling gun is too large to cause frequent gun jumping during fueling.

[0071] It should be noted that the negative pressure pressure is maintained in a fixed range, which means that the negative pressure pressure is greater than the restoring force of the reset spring A32 and less than the jump gun pressure, so as to maintain the normal work of the refueling gun when refueling the vehicle with the ORVR system.

[0072] The second valve core 5 is provided with a clamping part near one end of the first valve core 2, and a reset spring B6 is arranged between the clamping part and the sealing seat 4, and the two ends of the reset spring B6 are arranged on the clamping part and the sealing seat 4 respectively.

[0073] When the diaphragm 31 drives the first valve core 2 to move away from the oil gas recovery channel 12 under the action of the reset spring A32, the force of the first valve core 2 on the second valve core 5 is also eliminated, and at this time, the second valve core 5 is blocked at the valve port under the action of the reset spring B6.

[0074] Preferably, the sealing surface of the sealing seat 4 is a bevel, and a sealing ring 51 is arranged on the sealing surface of the second valve core 5, so as to improve the sealing effect of the second valve core 5.

[0075] Preferably, a reset spring C7 is arranged between the first valve core 2 and the sealing seat 4, and the two ends of the reset spring C7 are arranged on the first valve core 2 and the sealing seat 4 respectively; the arrangement of the reset spring C7 can accelerate the reset of the first valve core 2, so as to make the use of the ORVR valve more convenient.

[0076] Preferably, a protective sleeve 8 is arranged outside the valve body 1, which can protect the valve body 1 to some extent, so as to improve the service life of the ORVR valve.

[0077] Preferably, an oil gas extension pipe 16 is arranged at the oil outlet end of the valve body 1, which is convenient for being inserted into the refueling gun; a sealing gasket is arranged on the outer side wall of the oil gas extension pipe 16, so as to make the connection of the ORVR valve and the refueling gun more convenient and stable.

[0078] Preferably, an outer thread is arranged on the outer side wall of the oil outlet end of the valve body 1, which is convenient for being connected with the refueling gun.

[0079] An installation hole 17 is arranged at the oil inlet end of the valve body 1, and an inner thread is arranged on the inner side wall of the installation hole 17, which is convenient for being connected with the fuel pipe, so as to make the connection of the ORVR valve, the refueling gun and the fuel pipe more convenient.

[0080] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An ORVR valve characterized by: The valve body (1), the first valve core (2) and the driving part (3) are included. The oiling channel (11) and the oil gas recovery channel (12) which are not communicated with each other are arranged on the valve body (1). The first valve core (2) is movably arranged at the oil gas recovery channel (12), the driving part (3) is arranged in the valve body (1), and the action end of the driving part (3) is in transmission connection with the first valve core (2) for driving the first valve core (2) to act to realize the opening / closing of the oil gas recovery channel (12). The driving part (3) includes a diaphragm (31) and a reset spring A (32). A negative pressure cavity (13) is arranged in the valve body (1), the oil gas recovery channel (12) is communicated with the negative pressure cavity (13) through a channel A (91), a slide hole (14) is arranged right below the negative pressure cavity (13), the slide hole (14) is vertically staggered with the oil gas recovery channel (12), the shape of the slide hole (14) is matched with the cross-sectional shape of the first valve core (2), and the first valve core (2) is slidably arranged in the slide hole (14) along the axial direction of the slide hole (14). The edge of the diaphragm (31) is connected and sealed with the edge of the negative pressure cavity (13), one end of the first valve core (2) is connected with the middle part of the diaphragm (31), the reset spring A (32) is arranged between the first valve core (2) and the diaphragm (31), and the two ends of the reset spring A (32) are respectively arranged on the diaphragm (31) and the bottom wall of the negative pressure cavity (13). The sealing seat (4) and the second valve core (5) are further included. A sink (15) is arranged on the side of the valve body (1) away from the negative pressure cavity (13), and the oil gas recovery channel (12) is communicated with the sink (15) through a channel B (92). The sealing seat (4) is arranged at the slot opening of the sink (15), the middle part of the sealing seat (4) is provided with a valve port, the second valve core (5) is movably arranged at the valve port, and the first valve core (2) is in transmission connection with the second valve core (5). When the diaphragm (31) drives the first valve core (2) to act to close the oil gas recovery channel (12), the first valve core (2) will push the second valve core (5) away from the valve port to open the valve port. An oil gas extension pipe (16) is arranged on the oil outlet end of the valve body (1) to be conveniently inserted into a fueling gun, and a sealing gasket is arranged on the outer side wall of the oil gas extension pipe (16).

2. The ORVR valve of claim 1, wherein: An engaging part is arranged on one end of the second valve core (5) close to the first valve core (2), a reset spring B (6) is arranged between the engaging part and the sealing seat (4), and the two ends of the reset spring B (6) are respectively arranged on the engaging part and the sealing seat (4).

3. The ORVR valve of claim 2, wherein: The sealing surface of the sealing seat (4) is a bevel, and a sealing ring (51) is arranged on the sealing surface of the second valve core (5).

4. The ORVR valve of claim 2, wherein: A reset spring C (7) is arranged between the first valve core (2) and the sealing seat (4), and two ends of the reset spring C (7) are respectively arranged on the first valve core (2) and the sealing seat (4).

5. The ORVR valve of any one of claims 1-4, wherein: An outer protective sleeve (8) is arranged on the valve body (1).

6. The ORVR valve of claim 1, wherein: An outer thread for connecting with a refueling gun is arranged on the outer side wall of the oil outlet end of the valve body (1); an installation hole (17) is arranged on the oil inlet end of the valve body (1), and an inner thread for connecting with a refueling pipe is arranged on the inner side wall of the installation hole (17).

7. The ORVR valve of claim 1, wherein: The valve body (1) is made of aluminum alloy.

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