CN220452823U - Fuel tank two-way valve - Google Patents

Abstract

The utility model provides a fuel tank bi-directional valve, comprising: a shell, a baffle, a first elastic piece and a second elastic piece; when a fuel gas evaporated from a fuel tank flows into a first space, the fuel gas pushes the first elastic piece to stop closing a first valve, and pushes the second elastic piece to close a second valve, and the fuel gas flows from the first valve to a second opening; when the fuel tank generates a negative pressure, the negative pressure pushes the second elastic member to stop closing the second valve, and pushes the first elastic member to close the first valve, so that an atmosphere flows from the second valve to a first opening, and the pressure of the fuel tank is kept in an equilibrium state. Therefore, the flow direction of oil gas and the atmosphere is controlled through the first elastic piece and the second elastic piece, and the pressure of the fuel tank is kept in an equilibrium state.

Description

Fuel tank two-way valve

Technical Field

The utility model relates to a two-way valve, in particular to a two-way valve for a fuel tank of an automobile or a locomotive.

Background

In order to avoid environmental pollution caused by direct escape of oil gas in a fuel tank of a motor vehicle to the atmosphere, a carbon tank structure is additionally arranged on the motor vehicle to purify the oil gas escaped from the fuel tank.

In order to recover these naturally escaping oil and gas after the engine of the automobile and locomotive is started, there is a patent for improving the carbon tank structure.

Specifically, for example, taiwan patent publication No. M597327, an activated carbon canister structure for recovering oil and gas of a vehicle is provided, which comprises a canister body, a partition plate and an activated carbon filter layer. The tank body is provided with an oil gas inlet and an oil gas recovery port which are adjacent, and the tank body is provided with an air vent; the partition board is placed in the tank body to divide the tank body into an inlet area and a filtering area, the oil gas inlet and the oil gas recovery opening are communicated with the inlet area, and the partition board is provided with a through hole which is correspondingly positioned between the oil gas inlet and the oil gas recovery opening; the active carbon filter layer is placed in the filter area, and the oil gas inlet and the air vent are communicated with each other through the active carbon filter layer.

Taiwan patent publication No. M597177 provides an activated carbon canister with an oil-gas control throttle structure, which comprises a canister body and an oil-gas control throttle structure, wherein the canister body has an oil-gas inlet, a containing portion is disposed at the oil-gas inlet, the oil-gas control throttle structure is disposed at the containing portion, and the oil-gas control throttle structure separates a pipe joint and the containing portion by a base and an operating member. When the active carbon tank is assembled in the oil supply system, when the pressure of the volatilized oil gas in the oil tank is large enough to overcome the elastic force of a first elastic piece, the base is displaced to be communicated with the pipe joint part and the accommodating part, so that the oil gas can enter the tank body.

Besides improving the structure of a carbon tank, the Chinese patent publication No. CN217463357U provides a two-way valve for a fuel tank, which comprises a valve shell and a valve core, wherein a closed cavity is arranged in the valve shell, an upper connecting pipe and a lower connecting pipe are respectively arranged at the upper end and the lower end of the valve shell, the valve core can be arranged in the cavity in an up-down movable mode.

Disclosure of Invention

It is therefore an object of the present utility model to provide a fuel tank bi-directional valve that differs from the aforementioned CN217463357U patent.

The utility model provides a fuel tank bi-directional valve, comprising: a shell, in which a containing space is formed, and a first opening and a second opening are opposite to each other and are respectively communicated with two opposite ends of the containing space; the partition plate is combined in the shell and is positioned in the accommodating space, the accommodating space is partitioned into a first space and a second space by the partition plate, the first space is communicated with the first opening, the second space is communicated with the second opening, a first valve and a second valve which are adjacent are formed on the partition plate, and the first space and the second space are communicated with each other through the first valve or the second valve; the first elastic piece is combined with the partition board, the first elastic piece is provided with a first stop part adjacent to the first valve and positioned in the second space, the first stop part is provided with a first joint surface corresponding to the partition board, and the partition board is jointed with or far away from the partition board through the first joint surface, so that the first stop part can seal or not seal the first valve; the second elastic piece is combined with the partition board, the second elastic piece is provided with a second stop part adjacent to the second valve and positioned in the first space, the second stop part is provided with a second joint surface corresponding to the partition board, and the partition board is jointed or separated from the partition board through the second joint surface, so that the second stop part is closed or not closed; when a gas flow direction of a gas outside the fuel tank bi-directional valve flows into the first space from the first opening, the first stopping part stores a first elastic potential energy to stop closing the first valve, the second stopping part closes the second valve, and the gas flows from the first valve to the second opening through the second space; when the gas flows from the second opening to the second space, the second blocking part stores a second elastic potential energy to stop closing the second valve, the first blocking part closes the first valve, and the gas flows from the second valve to the first opening through the first space.

Further, the first opening is communicated with a fuel tank; when the gas flow direction flows into the first space from the first opening, it means that after the oil gas evaporated from the fuel tank flows into the first space from the first opening, the oil gas pushes the first blocking part to store the first elastic potential energy to stop closing the first valve, and pushes the second blocking part to close the second valve, and the oil gas flows from the first valve to the second opening through the second space; when the gas flows into the second space from the second opening, the negative pressure is generated by the fuel tank, and pushes the second blocking part to store the second elastic potential energy to stop closing the second valve, and pushes the first blocking part to close the first valve, so that the air outside the two-way valve of the fuel tank flows from the second valve to the first opening through the first space, and enters the fuel tank to maintain the pressure of the fuel tank in a balanced state.

Further, when the fuel tank evaporates the oil gas, the oil gas flows into the first space from the first opening, and the pressure of the oil gas is not smaller than a set value, the oil gas pushes the first stopping part to stop closing the first valve, and pushes the second stopping part to close the second valve, and the oil gas flows from the first valve to the second opening through the second space; when the fuel tank generates the negative pressure, and the magnitude of the negative pressure is not smaller than the set value, the negative pressure pushes the second stop part to stop closing the second valve, and pushes the first stop part to close the first valve, the atmosphere flows from the second valve to the first opening through the first space, and the atmosphere enters the fuel tank to enable the pressure of the fuel tank to maintain the balanced state.

Further, when the pressure of the oil gas or the negative pressure is smaller than the set value, or the pressure of the fuel tank maintains the balance state, the first stop portion closes the first valve, and the second stop portion closes the second valve.

Further, after the first blocking portion stores the first elastic potential energy, if the oil gas stops flowing into the first space from the first opening, the first blocking portion releases the first elastic potential energy to reclose the first valve; when the second stop portion stores the second elastic potential energy, if the fuel tank stops generating the negative pressure, the second stop portion releases the second elastic potential energy to reclose the second valve.

Further, one end of the first elastic piece is provided with a first combining part which is connected with the first stopping part, the other end of the first combining part is provided with a first limiting part, one end of the second elastic piece is provided with a second combining part which is connected with the second stopping part, and the other end of the second combining part is provided with a second limiting part; when the first elastic piece and the second elastic piece are respectively combined with the partition board, the first stopping part and the first limiting part are respectively positioned at two sides of the partition board, and the second stopping part and the second limiting part are respectively positioned at two sides of the partition board.

Further, the housing includes an upper cover and a lower base combined with each other, and the partition is disposed between the upper cover and the lower base.

Wherein, the material of the first elastic piece and the second elastic piece is rubber respectively.

The following effects are preferably achieved according to the above technical features:

1. the first elastic piece and the second elastic piece change whether the first valve and the second valve are closed or not, so that the flow direction of oil gas and the atmosphere is controlled, the subsequent discharge or reuse is convenient, and the pressure of the fuel tank is kept in a balanced state.

2. Normally, the first valve and the second valve are in a closed state, so that oil leakage can be avoided when the locomotive is dumped.

3. The first elastic piece and the second elastic piece made of rubber materials can reduce cost.

4. The first opening is communicated with the fuel tank, and the second opening can be communicated with the carbon tank or the atmosphere, so that the selection is convenient according to actual requirements.

5. The whole fuel tank bi-directional valve can be hung anywhere on the locomotive by means of proper pipeline configuration.

Drawings

Fig. 1 is a perspective view of a first embodiment of the present utility model.

Fig. 2 is a perspective view of a second embodiment of the present utility model.

Fig. 3 is a perspective view of a third embodiment of the present utility model, illustrating a different viewing angle from fig. 2.

Fig. 4 is a cross-sectional view of a first embodiment of the present utility model.

FIG. 5 is a cross-sectional view I of a first embodiment of the utility model in an operative state, illustrating the flow of oil and gas from a first opening to a second opening through a first valve.

Fig. 6 is a second cross-sectional view of the first embodiment of the utility model in an operative state, illustrating the flow of atmosphere from the second opening to the first opening via the second valve.

Fig. 7 is a cross-sectional view of a second embodiment of the present utility model in an operative condition, illustrating the installation of a fuel tank bi-directional valve to a fuel tank cap.

Reference numerals illustrate: 100. 100 a-a fuel tank bi-directional valve; 1-a housing; 11-an upper cover; 12-lower seat; 13. 13 a-a first opening; 14. 14 a-a second opening; 2-a separator; 21. 21 a-a first valve; 22. 22 a-a second valve; 3-a first elastic member; 31-a first stop; 311-a first bonding surface; 32-a first junction; 33-a first limit part; 4-a second elastic member; 41-a second stop; 411-second bonding surface; 42-a second junction; 43-a second limit part; a is an accommodating space; a1-a first space; a2-a second space; b-a fuel tank cap; b1-exhaust port.

Detailed Description

In view of the above technical features, the main effects of the fuel tank bi-directional valve of the present utility model will be apparent from the following examples.

Referring to fig. 1-3, a first embodiment of a fuel tank bi-directional valve 100 of the present utility model is disclosed, comprising:

a housing 1 is formed with a receiving space a as shown in fig. 4.

A partition board 2, which is combined in the housing 1 and located in the accommodating space a, wherein the partition board 2 divides the accommodating space a into a first space A1 and a second space A2 as shown in fig. 4.

More specifically, the housing 1 includes an upper cover 11 and a lower base 12 coupled to each other, and the partition 2 is engaged between the upper cover 11 and the lower base 12.

A first opening 13 is formed at an end of the lower base 12 away from the upper cover 11 to communicate with the first space A1, and a second opening 14 is formed at an end of the upper cover 11 away from the lower base 12 to communicate with the second space A2.

The partition plate 2 is formed with a first valve 21 and a second valve 22 adjacent to each other, and the first space A1 and the second space A2 are communicated with each other through the first valve 21 or the second valve 22.

In the preferred embodiment of the present utility model, the first opening 13 is connected to a fuel tank, the second opening 14 is connected to a canister (e.g. an activated carbon canister), but the fuel tank and the canister are not depicted in the drawings, and the first opening 13 is connected to the canister, the second opening 14 is connected to the fuel tank, so that the user can select the fuel tank according to the actual requirement, and the two embodiments are corresponding to each other, which is not repeated herein.

A first elastic member 3 coupled to the partition 2 and corresponding to the first valve 21.

A second elastic member 4 coupled to the partition 2 and corresponding to the second valve 22.

Preferably, the materials of the first elastic member 3 and the second elastic member 4 are rubber, so as to reduce cost.

Referring to fig. 4, the first elastic member 3 has a first stop portion 31 adjacent to the first valve 21 and located in the second space A2, and the first stop portion 31 has a first contact surface 311 corresponding to the partition 2. The first elastic member 3 further has a first engaging portion 32 with one end connected to the first stopping portion 31, and a first limiting portion 33 is disposed at the other end of the first engaging portion 32.

The second elastic member 4 has a second blocking portion 41 adjacent to the second valve 22 and located in the first space A1, and the second blocking portion 41 has a second abutting surface 411 corresponding to the partition 2. One end of the second elastic member 4 is further connected to the second stop portion 41, and a second limiting portion 43 is disposed at the other end of the second connecting portion 42.

When the first elastic member 3 and the second elastic member 4 are respectively combined with the partition board 2, the first stopping portion 31 and the first limiting portion 33 are respectively located at two sides of the partition board 2, and the second stopping portion 41 and the second limiting portion 43 are respectively located at two sides of the partition board 2, so that the first elastic member 3 and the second elastic member 4 can be firmly combined with the partition board 2.

Referring to fig. 4 and 5, when the fuel tank evaporates the fuel gas, for example, in a normal flameout state of a locomotive, a fuel gas naturally evaporates, and because the fuel tank is communicated with the atmosphere through the fuel tank bi-directional valve 100 and the canister, the fuel gas flows into the first space A1 from the first opening 13 to flow from the fuel tank to the canister and is adsorbed by activated carbon in the canister.

When the oil gas flows into the first space A1 from the first opening 13, if the pressure of the oil gas is not less than a set value, for example, after a large amount of the oil gas is accumulated in the first space A1, the oil gas pushes the first blocking portion 31 to deform and store a first elastic potential energy, and makes the first abutting surface 311 far away from the partition 2 to stop closing the first valve 21, and pushes the second abutting surface 411 to abut against the partition 2, so that the second blocking portion 41 closes the second valve 22, and the oil gas flows from the first valve 21 to the second opening 14 through the second space A2.

When the oil gas stops volatilizing, the oil gas stops flowing into the first space A1 from the first opening 13, and the first blocking portion 31 releases the first elastic potential energy to re-close the first valve 21.

Referring to fig. 4 and 6, in the case of a locomotive, when the locomotive engine is started, a negative pressure is generated in the fuel tank, and if the fuel tank is not connected to the atmosphere, a vacuum state is generated in the fuel tank, so that the locomotive engine cannot pump a fuel in the fuel tank. Therefore, it is necessary to let the fuel tank communicate with the atmosphere to balance the pressure, and since the fuel tank communicates with the atmosphere via the fuel tank bi-directional valve 100 and the canister, the atmosphere outside the fuel tank bi-directional valve 100 flows from the second opening 14 into the second space A2 and is sucked back into the fuel tank via the second valve 22, the first space A1 and the first opening 13 during the pressure balancing process, so that the pressure of the fuel tank is maintained in a balanced state.

More specifically, if the magnitude of the negative pressure is not smaller than the set value, for example, when the negative pressure generated in the fuel tank is too large after the engine of the locomotive is started, the negative pressure will push the second stop portion 41 to deform and store a second elastic potential energy, so that the second contact surface 411 is far away from the partition 2 to stop closing the second valve 22. At the same time, the negative pressure in the fuel tank stably pushes the first contact surface 311 to contact the partition board 2, so that the first stop portion 31 closes the first valve 21, and the air flows from the second valve 22 to the first opening 13 through the first space A1 and is sucked back into the fuel tank, so that the pressure of the fuel tank can maintain the equilibrium state.

When the locomotive engine is turned off again and the fuel tank stops generating the negative pressure, the second stop portion 41 releases the second elastic potential energy to re-close the second valve 22, and the air stops flowing from the second opening 14 into the second space A2.

It should be noted that the set value varies according to the elastic coefficients of the first elastic member 3 and the second elastic member 4, that is, the pressure of the oil gas or the negative pressure is a minimum pressure value sufficient to push the first elastic member 3 or the second elastic member 4 to deform and keep the first abutting surface 311 or the second abutting surface 411 away from the partition 2.

In practical implementation, the first elastic member 3 and the second elastic member 4 with different elastic coefficients may be selected, and the set values are different on the side of the first valve 21 and the side of the second valve 22, for example, a smaller negative pressure is enough to keep the second contact surface 411 away from the partition 2, but the oil gas needs to accumulate a larger pressure to keep the first contact surface 311 away from the partition 2, and so on.

Referring to fig. 4 to 6, when the pressure of the fuel gas or the negative pressure is smaller than the set value, or the pressure of the fuel tank is maintained in the balanced state, for example, when the locomotive is normally shut down and the fuel gas is not volatilized, the first stop portion 31 normally closes the first valve 21, and the second stop portion 41 normally closes the second valve 22.

At this time, even if the locomotive is dumped, the fuel in the fuel tank is not likely to leak out of the fuel tank bi-directional valve 100 through the first valve 21 or the second valve 22, thereby improving the safety of the locomotive.

Referring to fig. 7, a second embodiment of the bi-directional valve 100a for fuel tanks of the present utility model is disclosed, wherein, instead of one end communicating with the fuel tank and the other end communicating with the canister, the bi-directional valve 100a for fuel tanks may also be configured to communicate with one end with the atmosphere directly without passing through the canister.

In this embodiment, the fuel tank bi-directional valve 100a is coupled to a tank cap B of the fuel tank. In practical implementation, besides the additional structure that can be engaged with the tank cap B, a suitable supporting structure may be provided on the tank cap B or in the fuel tank, and the fuel tank bi-directional valve 100a and the fuel tank bi-directional valve 100 of fig. 4 may have different shapes, such as the shorter first opening 13a and the shorter second opening 14a, etc., according to practical requirements, the present utility model is not limited thereto.

The first opening 13a extends into the fuel tank interior, preferably to be maintained above the level of the fuel, so that the first space A1 communicates with the fuel tank interior, and the second opening 14a extends into the fuel tank cap B so that the second space A2 communicates with the atmosphere inside the fuel tank cap B via an exhaust port B1 in the fuel tank cap B.

By closing the first valve 21a and the second valve 22a, the discharge of the oil and gas from the fuel tank to the atmosphere or the entry of the atmosphere from the tank cap B into the fuel tank can be controlled as well, so that the pressure inside the fuel tank can be maintained in the balanced state.

Referring to fig. 4 and 7, in addition, through proper pipeline configuration, the whole fuel tank bi-directional valves 100, 100a can be hung at any place of the locomotive while maintaining communication between the fuel tank and the canister (or just the fuel tank), so that the position adjustment of the fuel tank bi-directional valves 100, 100a can be more conveniently performed according to the different types of the locomotive.

It should be understood that the above-described embodiments are merely preferred embodiments of the present utility model, and should not be construed as limiting the scope of the utility model, i.e., the simple equivalent changes and modifications according to the disclosure of the present utility model are intended to be included in the scope of the utility model.

Claims (8)

1. A bi-directional valve for a fuel tank, comprising:

a shell, in which a containing space is formed, and a first opening and a second opening are opposite to each other and are respectively communicated with two opposite ends of the containing space;

the partition plate is combined in the shell and is positioned in the accommodating space, the accommodating space is partitioned into a first space and a second space by the partition plate, the first space is communicated with the first opening, the second space is communicated with the second opening, a first valve and a second valve which are adjacent are formed on the partition plate, and the first space and the second space are communicated with each other through the first valve or the second valve;

the first elastic piece is combined with the partition board, the first elastic piece is provided with a first stop part adjacent to the first valve and positioned in the second space, the first stop part is provided with a first joint surface corresponding to the partition board, and the partition board is jointed with or far away from the partition board through the first joint surface, so that the first stop part can seal or not seal the first valve; and

the second elastic piece is combined with the partition board, the second elastic piece is provided with a second stop part adjacent to the second valve and positioned in the first space, the second stop part is provided with a second joint surface corresponding to the partition board, and the partition board is jointed or separated from the partition board through the second joint surface, so that the second stop part is closed or not closed;

when a gas flow direction of a gas outside the fuel tank bi-directional valve flows into the first space from the first opening, the first stopping part stores a first elastic potential energy to stop closing the first valve, the second stopping part closes the second valve, and the gas flows from the first valve to the second opening through the second space;

when the gas flows from the second opening to the second space, the second blocking part stores a second elastic potential energy to stop closing the second valve, the first blocking part closes the first valve, and the gas flows from the second valve to the first opening through the first space.

2. A fuel tank bi-directional valve according to claim 1, wherein: the first opening is communicated with a fuel tank; when the gas flow direction flows into the first space from the first opening, it means that after the oil gas evaporated from the fuel tank flows into the first space from the first opening, the oil gas pushes the first blocking part to store the first elastic potential energy to stop closing the first valve, and pushes the second blocking part to close the second valve, and the oil gas flows from the first valve to the second opening through the second space; when the gas flows into the second space from the second opening, the negative pressure is generated by the fuel tank, and pushes the second blocking part to store the second elastic potential energy to stop closing the second valve, and pushes the first blocking part to close the first valve, so that the air outside the two-way valve of the fuel tank flows from the second valve to the first opening through the first space, and enters the fuel tank to maintain the pressure of the fuel tank in a balanced state.

3. A fuel tank bi-directional valve according to claim 2, wherein: when the fuel tank evaporates the oil gas, the oil gas flows into the first space from the first opening, and the pressure of the oil gas is not smaller than a set value, the oil gas pushes the first stopping part to stop closing the first valve and pushes the second stopping part to close the second valve, and the oil gas flows from the first valve to the second opening through the second space; when the fuel tank generates the negative pressure, and the magnitude of the negative pressure is not smaller than the set value, the negative pressure pushes the second stop part to stop closing the second valve, and pushes the first stop part to close the first valve, the atmosphere flows from the second valve to the first opening through the first space, and the atmosphere enters the fuel tank to enable the pressure of the fuel tank to maintain the balanced state.

4. A fuel tank bi-directional valve according to claim 3, wherein: when the pressure of the oil gas or the negative pressure is smaller than the set value, or the pressure of the fuel tank maintains the balance state, the first stop part seals the first valve, and the second stop part seals the second valve.

5. A fuel tank bi-directional valve according to claim 2, wherein: when the first blocking part stores the first elastic potential energy, if the oil gas stops flowing into the first space from the first opening, the first blocking part releases the first elastic potential energy to reclose the first valve; when the second stop portion stores the second elastic potential energy, if the fuel tank stops generating the negative pressure, the second stop portion releases the second elastic potential energy to reclose the second valve.

6. A fuel tank bi-directional valve according to claim 1, wherein: one end of the first elastic piece is provided with a first combining part which is connected with the first stopping part, the other end of the first combining part is provided with a first limiting part, one end of the second elastic piece is provided with a second combining part which is connected with the second stopping part, and the other end of the second combining part is provided with a second limiting part; when the first elastic piece and the second elastic piece are respectively combined with the partition board, the first stopping part and the first limiting part are respectively positioned at two sides of the partition board, and the second stopping part and the second limiting part are respectively positioned at two sides of the partition board.

7. A fuel tank bi-directional valve according to claim 1, wherein: the shell comprises an upper cover and a lower seat which are combined with each other, and the partition board is arranged between the upper cover and the lower seat.

8. The bi-directional valve of claim 1 wherein said first resilient member and said second resilient member are each rubber.