Oil tank isolating valve with temporary blocking function

Abstract

The utility model discloses an oil tank isolating valve with a temporary blocking function. The oil tank isolating valve comprises an oil gas channel, a valve body, a blocking piece and a reset traction piece. The oil gas channel comprises a first channel used for being connected with an oil tank, a second channel used for being connected with a carbon tank and a connecting opening used for communicating the first channel with the second channel. The valve body comprises a body part and a piston part. The body part is provided with a blocking groove with an opening facing the connecting opening. The piston part is used for blocking the connecting opening; the blocking piece can be clamped in the blocking groove so as to support and lock the valve body, and when the blocking piece is clamped in the blocking groove, the piston part is separated from the connecting opening; the reset traction piece is used for pulling the blocking piece in the direction away from the valve body so that the blocking piece can keep the movement tendency away from the valve body after being clamped to the blocking groove. According to the oil tank isolating valve, the oil tank can be communicated with the carbon tank in the initial state, and the production and assembly operation of motor vehicles can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of isolation valves, in particular to an oil tank isolation valve with a temporary blocking function. Background Art

[0002] The fuel tank is the main component for storing fuel in a motor vehicle. The fuel in the fuel tank may generate oil and gas due to volatilization, and the oil and gas cannot be directly discharged because it will pollute the atmosphere. In existing motor vehicles, the fuel tank is connected to a carbon canister, which can receive the oil and gas in the fuel tank and allow the oil and gas to enter the engine of the motor vehicle for combustion through desorption. When the oil and gas stored in the carbon canister reaches saturation and fails to be desorbed in time, it is necessary to block the supply of oil and gas in the fuel tank. Therefore, a fuel tank isolation valve is set between the carbon canister and the fuel tank. The fuel tank isolation valve can control the connection and disconnection between the carbon canister and the fuel tank to avoid oversaturation of the oil and gas in the carbon canister, and can also be used to control the pressure in the fuel tank. Chinese patents CN108626450A, CN110486483A and CN113915031A disclose the specific structure of the fuel tank isolation valve. The fuel tank isolation valve is connected to an electronic control system, which controls the opening and closing of the fuel tank isolation valve, thereby controlling the connection and disconnection between the carbon canister and the fuel tank.

[0003] During the production and assembly of motor vehicles, a small amount of fuel needs to be added to the fuel tank in advance on the assembly line in order to inspect the motor vehicles. When adding fuel to the fuel tank, the carbon canister and the fuel tank need to be connected to avoid negative pressure in the fuel tank that makes it impossible to open the fuel tank cap or excessive pressure in the fuel tank that causes fuel to spray out of the refueling port. However, during the production and assembly of motor vehicles, it may be impossible or difficult to provide an electronic control system connected to the fuel tank isolation valve, or the fuel tank isolation valve cannot be connected to the electronic control system at this time, which causes the fuel tank isolation valve to be unable to open the oil and gas channel, and then the fuel tank and the carbon canister cannot be connected, the fuel tank becomes a closed structure, and it is difficult to open the fuel tank cap, which makes the refueling operation more complicated during the production and assembly of motor vehicles, affecting the production efficiency of motor vehicles. Utility Model Content

[0004] The utility model aims to provide a fuel tank isolation valve with a temporary blocking function, which is used to provide a fuel tank isolation valve that can connect the fuel tank with the carbon canister in an initial state and can simplify the production and assembly operations of motor vehicles using the fuel tank isolation valve.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] An oil tank isolation valve with a temporary blocking function, comprising:

[0007] An oil and gas passage, comprising a first passage for connecting to an oil tank, a second passage for connecting to a carbon canister, and a connecting opening for connecting the first passage and the second passage;

[0008] The valve body comprises a main body and a piston, wherein the main body is provided with a blocking groove opening toward the connecting opening; and the piston is used to block the connecting opening;

[0009] a blocking member capable of being engaged with the blocking groove to support and lock the valve body, and when the blocking member is engaged with the blocking groove, the piston portion is separated from the connecting opening;

[0010] The resetting traction member is used to pull the blocking member in a direction away from the valve body, so that the blocking member keeps a movement trend away from the valve body after being engaged in the blocking groove.

[0011] Preferably, it further comprises a connecting plate, wherein the connecting plate comprises a first connecting portion and a second connecting portion for connecting to the resetting traction member, one end of the blocking member is connected to the first connecting portion, and the other end can be snapped into the blocking groove.

[0012] Preferably, the resetting traction member is a magnet, and the blocking member is made of magnetic material; the magnet attracts the blocking member to move in a direction away from the valve body;

[0013] The second connecting portion is provided with a groove facing the blocking member, and the magnet is received in the groove.

[0014] Preferably, the reset traction member is an elastic reset member; one end of the elastic reset member is connected to the blocking member, and when the blocking member is engaged in the blocking groove, the elastic reset member elastically deforms and drives the blocking member to move in a direction away from the valve body.

[0015] Preferably, the elastic return member is a spring or a torsion spring.

[0016] Preferably, the blocking member includes a main body, and a mounting portion and a clamping portion arranged at opposite ends of the main body, the mounting portion is connected to the first connecting portion, the clamping portion includes a blocking portion and a snap-fit ​​portion connected to each other, the snap-fit ​​portion extends into the blocking groove, and the blocking portion abuts against the surface of the main body to support the valve body.

[0017] Preferably, the blocking member is movably sleeved on the first connecting portion, and the blocking member can rotate relative to the first connecting portion to move to engage with the blocking groove;

[0018] Alternatively, one end of the blocking member is fixed to the first connecting portion, the engaging portion moves to engage with the blocking groove, and the blocking member is elastically deformed.

[0019] Preferably, the blocking groove is an annular groove extending along the circumference of the main body;

[0020] Alternatively, a plurality of blocking grooves are provided, and the plurality of blocking grooves are spaced apart along the circumference of the valve body; a plurality of blocking members and a plurality of reset traction members are provided respectively, and the plurality of blocking members, the plurality of reset traction members are connected to the plurality of blocking grooves in a one-to-one correspondence.

[0021] Preferably, the connecting plate is sleeved on the main body, and the connecting plate is provided with a first connecting portion and a second connecting portion, the first connecting portions are the same in number as the blocking members and are connected one-to-one; the resetting traction members are the same in number as the second connecting portions and are connected one-to-one.

[0022] Preferably, it also includes:

[0023] An electromagnetic assembly, used for generating magnetic force to attract the valve body when powered on, so that the piston portion of the valve body is away from the connecting opening and moves to an open position;

[0024] an elastic member, disposed between the valve body and the electromagnetic assembly, the elastic member driving the piston portion of the valve body to block the connecting opening and move the valve body to a closed position;

[0025] The blocking member is used to lock the valve body at an intermediate position between the open position and the closed position.

[0026] Compared with the prior art, the beneficial effects of the present invention include at least:

[0027] By providing a blocking member to support the locking valve body, the fuel tank can be connected to the carbon canister, thereby enabling the fuel tank to be refueled. Therefore, in the production process of motor vehicles including the fuel tank isolation valve of the present application, the fuel tank can be refueled without using an electronic control system, thereby simplifying the operating procedure of the fuel tank isolation valve and improving the production efficiency of motor vehicles. In addition, by providing a reset traction member, the blocking member can be driven away from the valve body, thereby preventing the blocking member from affecting the movement of the valve body when the fuel tank isolation valve is working normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a fuel tank isolation valve according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Cross-sectional view of the middle BB section;

[0030] Figure 3 yes Figure 1 A cross-sectional view of section AA when the middle reset traction member adopts an elastic reset member;

[0031] Figure 4 yes Figure 3 The middle C part is an enlarged view when the elastic reset member is a spring and the clamping part is clamped with the main body;

[0032] Figure 5 yes Figure 3 The middle C part is an enlarged view when the elastic reset member is a spring and the clamping part is separated from the main body;

[0033] Figure 6 It is a partial cross-sectional view of a case where the elastic reset member in the oil tank isolation valve of an embodiment of the present invention adopts a torsion spring;

[0034] Figure 7 It is a partial cross-sectional view of another state when the elastic reset member in the oil tank isolation valve of the embodiment of the present invention adopts a torsion spring;

[0035] Figure 8 yes Figure 1 A cross-sectional view of section AA when the middle reset traction member adopts a magnet;

[0036] Fig. 9 yes Figure 8 An enlarged view of the middle D portion when the clamping portion is clamped with the main body;

[0037] Fig.10 yes Figure 8 The enlarged view of the middle D part when the clamping part is separated from the main body.

[0038] In the figure: 11, first channel; 12, second channel; 13, connecting opening; 2, valve body; 21, main body; 211, blocking groove; 22, piston; 3, blocking member; 31, main body; 311, protrusion; 312, connecting hole; 32, mounting portion; 33, clamping portion; 331, blocking portion; 332, snap-fit ​​portion; 41, magnet; 42, elastic return member; 43, torsion arm; 44, bending section; 45, torsion spring body; 46, hook; 5, connecting plate; 51, first connecting portion; 52, second connecting portion; 521, groove; 100, electromagnetic assembly; 200, elastic member. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0040] The words expressing positions and directions described in the present utility model are all explained by taking the drawings as examples, but they can be changed as needed, and all the changes are included in the protection scope of the present utility model.

[0041] like Figure 1 and Figure 2 As shown, the present invention provides an oil tank isolation valve with a temporary blocking function, including an oil and gas channel, a valve body 2, a blocking member 3 and a reset traction member, and may also include a connecting plate 5, an electromagnetic assembly 100 and an elastic member 200.

[0042] The oil and gas passage includes a first passage 11 for connecting to the oil tank, a second passage 12 for connecting to the carbon canister, and a connecting opening 13 for communicating between the first passage 11 and the second passage 12 .

[0043] The valve body 2 includes a main body 21 and a piston 22. The main body 21 and the piston 22 can be integrally formed, and the main body 21 and the piston 22 can be made of metal that can be attracted by magnetic force, so that the valve body 2 can move under the action of magnetic force. The main body 21 can be provided with a blocking groove 211 formed by being recessed from the surface of the main body 21 in a direction away from the connection opening 13, for example, the surface of the main body 21 facing the connection opening 13 is recessed to form the blocking groove 211. The blocking groove 211 can be provided as one or more. When the blocking groove 211 is provided as one, the blocking groove 211 can be an annular groove extending along the circumference of the main body 21. When the blocking groove 211 is provided as multiple, the multiple blocking grooves 211 can be distributed at intervals along the circumference of the main body 21, preferably at equal intervals. The piston 22 is used to block the connection opening 13 so that the oil and gas passage is closed and the carbon canister and the fuel tank are blocked. When the piston 22 is separated from the connection opening 13, the oil and gas passage is opened, and the carbon canister and the fuel tank are connected.

[0044] The electromagnetic component 100 can generate magnetic force to attract the valve body 2 when powered on, so that the piston part 22 of the valve body 2 is away from the connection opening 13 and the oil and gas channel is in an open state, at which time the carbon canister is connected to the fuel tank. Specifically, the electromagnetic component 100 can be arranged on the side of the main body 21 of the valve body 2 away from the connection opening 13. When the electromagnetic component 100 is powered on, the magnetic force generated by the electromagnetic component 100 attracts the main body 21 of the valve body 2 to move in a direction away from the connection opening 13, and then drives the piston part 22 to move in a direction away from the connection opening 13, so that the fuel tank isolation valve is in an open state, and the valve body 2 is in an open position. Among them, the electromagnetic component 100 can be specifically an electromagnetic coil.

[0045] The elastic member 200 is arranged between the valve body 2 and the electromagnetic assembly 100, specifically, between the main body 21 and the electromagnetic assembly 100. When the electromagnetic assembly 100 attracts the valve body 2 to move away from the connection opening 13, the distance between the valve body 2 and the electromagnetic assembly 100 becomes smaller, so that the elastic member 200 is compressed. When the electromagnetic assembly 100 is powered off, the elastic member 200 will rebound to drive the valve body 2 to move toward the connection opening 13, so that the piston portion 22 of the valve body 2 can block the connection opening 13, thereby making the oil tank isolation valve in a closed state, and the valve body 2 is in a closed position at this time. Among them, the elastic member 200 can be specifically a spring, and more specifically a compression spring.

[0046] Reference Figures 3 to 10 , the blocking member 3 can be engaged in the blocking groove 211 of the main body 21 to support and lock the valve body 2. At this time, the piston part 22 is separated from the connecting opening 13, the oil and gas passage is opened, and the carbon canister is connected to the fuel tank. The blocking member 3 can lock the valve body 2 in an intermediate position between the open position and the closed position. Specifically, the valve body 2 moves toward the electromagnetic assembly 100 and compresses the elastic member 200, and then releases the valve body 2. The elastic member 200 will tend to move the valve body 2 toward the closed position. In the process of the valve body 2 moving toward the closed position, the blocking member 3 will be engaged in the blocking groove 211 of the main body 21 of the valve body 2, so that the position of the valve body 2 is locked in the intermediate position. At this time, the valve body 2 is located between the open position and the closed position. At this time, the oil and gas passage is in an open state, and the carbon canister is connected to the fuel tank.

[0047] The blocking member 3 may include a main body 31 and a mounting portion 32 and a clamping portion 33 disposed at opposite ends of the main body 31. The main body 31, the mounting portion 32 and the clamping portion 33 may be an integrated structure. The main body 31 may be a strip plate-like structure. The mounting portion 32 is used to connect with the internal parts of the oil tank isolation valve, for example, to connect with the connecting plate 5 inside the oil tank isolation valve, so as to achieve the installation of the blocking member 3. The clamping portion 33 may be clamped to the blocking groove 211 of the main body 21. The clamping portion 33 may include a blocking portion 331 and a snap-fit ​​portion 332 that are connected to each other. The blocking portion 331 may be a strip plate-like structure, and the snap-fit ​​portion 332 is a bent piece extending from the edge of the blocking portion 331 toward the blocking groove 211. When the clamping portion 33 is clamped to the blocking groove 211 of the body 21, the buckling portion 332 will extend into the blocking groove 211, and the wall forming the blocking groove 211 will limit the movement of the buckling portion 332 in the direction perpendicular to the movement of the valve body 2, so that the buckling portion 332 remains in the blocking groove 211. The blocking portion 331 will abut against the surface of the body 21, specifically, the surface of the body 21 forming the blocking groove 211, to support the valve body 2, and the supporting force applied by the blocking portion 331 to the body 21 can offset the elastic force applied by the elastic member 200 to the body 21, so that the valve body 2 is locked.

[0048] There can be multiple blocking members 3. When there are multiple blocking grooves 211, multiple blocking members 3 and multiple blocking grooves 211 can be connected one by one; when the blocking groove 211 is an annular groove, multiple blocking members 3 can be connected to different circumferential positions of the blocking groove 211, and the blocking members 3 can be distributed at circumferential intervals around the blocking groove 211, preferably at equal intervals.

[0049] As a preferred embodiment, in order to simplify the structure of the oil tank isolation valve, the blocking member 3 is provided as one, the main body 21 is provided with a blocking groove 211 , and the valve body 2 is locked by the blocking member 3 .

[0050] The connecting plate 5 is fixed inside the oil tank isolation valve, for example, the connecting plate 5 can be sleeved on the main body 21, and the connecting plate 5 can be fixedly installed inside the oil tank isolation valve by fasteners such as screws. The connecting plate 5 is used to install the blocking member 3 and the reset traction member. Specifically, the connecting plate 5 is provided with a first connecting portion 51 and a second connecting portion 52. The first connecting portion 51 is used to install the blocking member 3, for example, the first connecting portion 51 is connected to the mounting portion 32 of the blocking member 3. The first connecting portion 51 can specifically be a cylindrical structure, and the mounting portion 32 of the blocking member 3 is sleeved on the first connecting portion 51. Among them, the number of the first connecting portions 51 is the same as the number of the blocking members 3 and they are connected one-to-one, and the number of the second connecting portions 52 is the same as the number of the reset traction members and they are connected one-to-one.

[0051] The reset traction member is used to pull the blocking member 3 in a direction away from the valve body 2. When the blocking member 3 is engaged with the blocking groove 211, the reset traction member will keep pulling the blocking member 3 so that the blocking member 3 keeps moving away from the valve body 2. At the same time, the wall forming the blocking groove 211 restricts the movement of the snap-fitting portion 332 in a direction perpendicular to the movement direction of the valve body 2, so that the blocking member 3 remains engaged with the blocking groove 211 to support the locking valve body 2, thereby blocking the valve body 2 from further moving to the closed position. When the blocking member 3 is separated from the valve body 2, the wall forming the blocking groove 211 releases the restriction on the blocking member 3, and the reset traction member will pull the blocking member 3 away from the valve body 2 to the avoidance position. When the blocking member 3 moves to the avoidance position, any part of the blocking member 3 is not located on the moving path of the valve body 2. At this time, the valve body 2 is not hindered by the blocking member 3 when moving between the open position and the closed position. The blocking member 3 and the reset traction member will remain in the fuel tank isolation valve. The functions of the blocking member 3 and the reset traction member are generally one-time. The traction force applied by the reset traction member to the blocking member 3 may be an elastic reset force or a magnetic force, etc. The number of the reset traction members may be the same as the number of the blocking members 3, and the reset traction members are connected to the blocking members 3 in a one-to-one correspondence.

[0052] Reference Figures 3 to 7In some specific embodiments, the reset traction member can use an elastic reset force to pull the blocking member 3. Specifically, the reset traction member is an elastic reset member 42. The elastic reset member 42 is connected to the blocking member 3, for example, the other end of the elastic reset member 42 is connected to one end of the main body 31 of the blocking member 3 adjacent to the clamping portion 33, and the end of the main body 31 adjacent to the clamping portion 33 is provided with a protrusion 311, and the protrusion 311 and the side of the main body 31 facing the elastic reset member 42 are jointly surrounded to form a connecting hole 312, and the connecting hole 312 is used to match the elastic reset member 42. When the blocking member 3 is located at the avoidance position, the elastic reset member 42 is in a relaxed state; when the blocking member 3 moves to the blocking groove 211 that is clamped in the valve body 2, the elastic reset member 42 is elastically deformed; when the blocking member 3 is separated from the valve body 2, the elastic reset member 42 is reset and drives the blocking member 3 to move to the avoidance position. Among them, the elastic reset member 42 can be specifically a spring or a torsion spring.

[0053] Reference Figure 4 and Figure 5 When the elastic reset member 42 is a spring, the second connection portion 52 may be a plate-like structure with a through hole, and the extension direction of the through hole may be perpendicular to the axial direction of the valve body 2. Hooks 46 are formed at both ends of the elastic reset member 42, one hook 46 of the elastic reset member 42 may be hooked at the through hole of the second connection portion 52, and the other hook 46 may be hooked at the connection hole 312 of the blocking member 3. When the blocking member 3 moves toward the valve body 2 to be engaged in the blocking groove 211 of the valve body 2, the connection hole 312 of the blocking member 3 moves away from the second connection portion 52, thereby increasing the distance between the connection hole 312 and the through hole of the second connection portion 52, and the elastic reset member 42 is stretched and elastically deformed.

[0054] Reference Figure 6 and Figure 7When the elastic reset member 42 is a torsion spring, the second connection portion 52 may be a plate-like structure with a through hole, and the extension direction of the through hole may be parallel to the axial direction of the valve body 2. The elastic reset member 42 includes a torsion spring body 45 and two torsion arms 43 connected to the torsion spring body 45. The torsion spring body 45 may be sleeved on the first connection portion 51 or the blocking member 3, and the torsion spring body 45 may be a mounting portion 32 sleeved on the blocking member 3. The two torsion arms 43 of the elastic reset member 42 are respectively formed with a bending section 44, and the bending section 44 is parallel to the axial direction of the valve body 2. One torsion arm 43 of the elastic reset member 42 can extend to the second connection portion 52, and the bent section 44 of the torsion arm 43 is inserted into the through hole of the second connection portion 52, so that the torsion arm 43 and the second connection portion 52 remain fixed; another torsion arm 43 of the elastic reset member 42 can extend to the protrusion 311 of the blocking member 3, and the bent section 44 of the other torsion arm 43 is inserted into the connection hole 312 of the blocking member 3, so that the other torsion arm 43 can move with the blocking member 3. When the blocking member 3 moves toward the valve body 2 to be engaged in the blocking groove 211 of the valve body 2, the blocking member 3 will rotate relative to the first connection portion 51, and the torsion arm 43 in the elastic reset member 42 connected to the blocking member 3 will rotate relative to the torsion spring body 45 of the elastic reset member 42 and the torsion arm 43 connected to the second connection portion 52, thereby causing the torsion arm 43 in the elastic reset member 42 connected to the blocking member 3 to generate elastic deformation.

[0055] Reference Figures 8 to 10In some other specific embodiments, the reset traction member can use magnetic force to pull the blocking member 3, and the blocking member 3 can be made of magnetic material, so the blocking member 3 can react to the magnetic field, for example, the blocking member 3 can be attracted by the magnetic force and move, and the blocking member 3 can be made of one or more materials selected from iron, cobalt, nickel and alloys thereof. Specifically, the reset traction member is a magnet 41, and the magnet 41 generates a magnetic force to attract the blocking member 3 to move in a direction away from the valve body 2. The magnet 41 can be arranged on the side of the blocking member 3 away from the valve body 2, and the magnet 41 will attract the blocking member 3 to move toward the magnet 41, thereby making the blocking member 3 away from the valve body 2. When the blocking member 3 is engaged in the blocking groove 211, the wall forming the blocking groove 211 limits the movement of the snap-fit ​​portion 332 of the blocking member 3 in a direction perpendicular to the movement direction of the valve body 2, so as to prevent the blocking member 3 from being attracted by the magnet 41 and moving. When the blocking member 3 is separated from the blocking groove 211, the magnet 41 will attract the blocking member 3 to move to the avoidance position, so that the blocking member 3 will not affect the movement of the valve body 2 in the subsequent normal operation of the oil tank isolation valve. After the blocking member 3 moves to the avoidance position, any part of the blocking member 3 is not located on the moving path of the valve body 2. At this time, the valve body 2 can move between the open position and the closed position without being hindered by the blocking member 3. The blocking member 3 and the magnet 41 will always remain in the oil tank isolation valve, and the role of the blocking member 3 and the magnet 41 is generally one-time. Among them, the magnet 41 can be a permanent magnet, for example, the magnet 41 is a magnet. The number of magnets 41 can be the same as the number of blocking members 3, and the magnets 41 are connected to the blocking members 3 one by one. When the blocking member 3 moves to the avoidance position, the blocking member 3 can fit with the magnet 41.

[0056] To cooperate with the magnet 41 , the second connecting portion 52 may be formed with a groove 521 , the opening direction of the groove 521 is toward the valve body 2 , and the groove 521 is used to accommodate the magnet 41 , for example, the magnet 41 and the groove 521 are interference fit so that the magnet 41 is firmly installed in the groove 521 .

[0057] In some specific embodiments, the first connection portion 51 can be movably connected to the mounting portion 32 of the blocking member 3, for example, the blocking member 3 is movably sleeved on the first connection portion 51. The blocking member 3 as a whole can move relative to the first connection portion 51, for example, the blocking member 3 can rotate around the first connection portion 51 as a whole. When the blocking member 3 is engaged with the blocking groove 211 of the main body 21 and is located at the engaged position (this may be the state of the fuel tank isolation valve when it leaves the factory), the reset traction member pulls the blocking member 3 so that the blocking member 3 maintains a tendency to move to the avoidance position. When the blocking member 3 is separated from the main body 21, the reset traction member can pull the blocking member 3 alone to move to the avoidance position (this may be the state of the fuel tank isolation valve after the vehicle is assembled).

[0058] In some other specific embodiments, the first connection portion 51 can be fixedly connected to the mounting portion 32 of the blocking member 3, for example, the blocking member 3 is interference fit on the first connection portion 51. The blocking member 3 can be a structure with a certain elasticity, specifically, the main body 31 of the blocking member 3 can be an elastic plate. When the blocking member 3 is located in the avoidance position, the blocking member 3 is in a relaxed state. When the blocking member 3 moves to the clamping position (which can be the state of the oil tank isolation valve when it leaves the factory), the clamping portion 33 of the blocking member 3 moves relative to the mounting portion 32, and causes the blocking member 3 to produce elastic deformation, for example, the main body 31 of the blocking member 3 produces elastic deformation; and the reset traction member will pull the blocking member 3 so that the blocking member 3 maintains a tendency to move to the avoidance position. When the blocking member 3 is separated from the main body 21, the blocking member 3 itself will rebound to move to a relaxed state. At the same time, the reset traction member pulls the blocking member 3 to move to an avoidance position (this may be the state of the fuel tank isolation valve after the vehicle is assembled), so that the clamping portion 33 of the blocking member 3 moves to the avoidance position under the simultaneous action of the elastic reset force of the blocking member 3 itself and the traction force of the reset traction member.

[0059] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. A fuel tank isolation valve with temporary blocking function, characterized in that: include: An oil and gas channel, comprising a first channel (11) for connecting to an oil tank, a second channel (12) for connecting to a carbon canister, and a connecting opening (13) for connecting the first channel (11) and the second channel (12); The valve body (2) comprises a main body portion (21) and a piston portion (22); the main body portion (21) is provided with a blocking groove (211) opening toward the connecting opening (13); the piston portion (22) is used to block the connecting opening (13); A blocking member (3) capable of being engaged with the blocking groove (211) to support and lock the valve body (2); and when the blocking member (3) is engaged with the blocking groove (211), the piston portion (22) is separated from the connecting opening (13); The resetting traction member is used to pull the blocking member (3) in a direction away from the valve body (2), so that the blocking member (3) maintains a movement trend away from the valve body (2) after being engaged in the blocking groove (211).

2. The fuel tank isolation valve according to claim 1, characterized in that: It also comprises a connecting plate (5), the connecting plate (5) comprising a first connecting portion (51) and a second connecting portion (52) for connecting to the resetting traction member, one end of the blocking member (3) being connected to the first connecting portion (51), and the other end being capable of being snap-fitted into the blocking groove (211).

3. The fuel tank isolation valve according to claim 2, characterized in that: The resetting traction member is a magnet (41), and the blocking member (3) is made of a magnetic material; the magnet (41) attracts the blocking member (3) to move in a direction away from the valve body (2); The second connecting portion (52) is provided with a groove (521) facing the blocking member (3), and the magnet (41) is accommodated in the groove (521).

4. The fuel tank isolation valve according to claim 2, characterized in that: The resetting traction member is an elastic resetting member (42); one end of the elastic resetting member (42) is connected to the blocking member (3); when the blocking member (3) is engaged in the blocking groove (211), the elastic resetting member (42) elastically deforms and drives the blocking member (3) to move in a direction away from the valve body (2).

5. The fuel tank isolation valve according to claim 4, characterized in that: The elastic reset element (42) is a spring or a torsion spring.

6. The fuel tank isolation valve according to claim 2, characterized in that: The blocking member (3) comprises a main body (31), and a mounting portion (32) and a clamping portion (33) arranged at opposite ends of the main body (31), the mounting portion (32) being connected to the first connecting portion (51), the clamping portion (33) comprising a blocking portion (331) and a snap-fit ​​portion (332) connected to each other, the snap-fit ​​portion (332) extending into the blocking groove (211), and the blocking portion (331) abutting against a surface of the main body (31) to support the valve body (2).

7. The fuel tank isolation valve according to claim 6, characterized in that: The blocking member (3) is movably sleeved on the first connecting portion (51), and the blocking member (3) is capable of rotating relative to the first connecting portion (51) to move to engage with the blocking groove (211); Alternatively, one end of the blocking member (3) is fixed to the first connecting portion (51), the engaging portion (33) moves to engage with the blocking groove (211), and the blocking member (3) is elastically deformed.

8. The fuel tank isolation valve according to claim 2, characterized in that: The blocking groove (211) is an annular groove extending in the circumferential direction of the main body (21); Alternatively, a plurality of the blocking grooves (211) are provided, and the plurality of blocking grooves (211) are spaced apart along the circumference of the valve body (2); a plurality of the blocking members (3) and a plurality of the resetting traction members are provided respectively, and the plurality of the blocking members (3), the plurality of the resetting traction members and the plurality of the blocking grooves (211) are connected in a one-to-one correspondence.

9. The fuel tank isolation valve according to claim 8, characterized in that: The connecting plate (5) is sleeved on the main body (21), and the connecting plate (5) is provided with a first connecting portion (51) and a second connecting portion (52), the first connecting portions (51) being the same in number as the blocking members (3) and being connected in a one-to-one correspondence; the resetting traction members being the same in number as the second connecting portions (52) and being connected in a one-to-one correspondence.

10. The fuel tank isolation valve according to claim 1, characterized in that: Also includes: An electromagnetic component (100) is used to generate a magnetic force to attract the valve body (2) when power is supplied, so that the piston portion (22) of the valve body (2) moves away from the connecting opening (13) and moves to an open position; an elastic member (200) disposed between the valve body (2) and the electromagnetic assembly (100), the elastic member (200) driving the piston portion (22) of the valve body (2) to block the connecting opening (13) and causing the valve body (2) to move to a closed position; The blocking member (3) is used to lock the valve body (2) at an intermediate position between an open position and a closed position.

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