KR200269449Y1 - Apparatus for withdrawing and refilling liquefied gas within a fuel tank used in LPG automobiles - Google Patents

Abstract

The present invention relates to a liquefied gas recovery and recharging device in the LPG fuel tank, in particular, to repair the LPG vehicle fuel tank to recover the liquefied gas charged in the fuel tank, and to refill it in the fuel tank after maintenance work An apparatus for recovering or recharging a fuel filled in a fuel tank 10 of an LPI vehicle to a storage container 130 or recharging the fuel tank 10, the fuel tank 10 and the storage container 130. A pressure pump 110 for pressurizing and transporting fuel of the fuel cell; An automatic ignition unit 120 for automatically burning the discharged fuel remaining in the fuel tank 10 or the storage container 130; The fuel tank 10, the storage container 130, the pressure pump 110, and the valve control unit 100 is connected to the automatic ignition unit 120 to regulate the flow of fuel, by using a pressure pump The constant pressure difference between the fuel tank and the storage container of the vehicle is continuously made to work quickly to be able to increase the work efficiency, it is designed to have an effect that can increase the recovery rate of the remaining liquid fuel in the fuel tank.

Description

Apparatus for withdrawing and refilling liquefied gas within a fuel tank used in LPG automobiles}

The present invention relates to a liquefied gas recovery and recharging device in the LPG fuel tank, in particular, to repair the LPG vehicle fuel tank to recover the liquefied gas charged in the fuel tank, and to refill it in the fuel tank after maintenance work Relates to a device.

In general, the fuel tank for LPG vehicles is composed of a high-pressure container for filling LPG fuel, the fuel tank is equipped with three basic valves, such as gas phase valve, liquid valve, filling valve and volume indicator.

However, if parts such as gauges provided in the fuel tank are broken or broken, the operator must remove the fuel charged in the fuel tank for repairing the fuel tank, and if the fuel removal work is not sufficiently advanced, If this is done, an accident may occur due to worker's carelessness, resulting in personal injury and property damage.

In order to solve such a problem, in order to recharge the fuel tank after recovering the fuel in the fuel tank, the patent application No. 8051 of 2000 discloses a maintenance apparatus and a maintenance method of the gas tank for an LPI vehicle. This will be described below in detail.

Referring to FIG. 1, conventionally, a plurality of valves 21, 22, 23, 24, and 25 are connected to an outlet 12a of a fuel tank 10 of an LPG vehicle. (21) (22) (23) (24) (25) are connected to the storage gas cylinder (20) and the vacuum pump (30). The vacuum pump 30 is connected to the automatic ignition unit 40 is composed of an automatic ignition unit 40 for checking the vacuum state.

The conventional liquefied gas recovery and recharging device configured as described above moves the LPG vehicle equipped with the fuel tank 10 to be maintained to the place where the storage gas cylinder 20 is located, and the outlet 12 of the fuel tank 10 and The fifth valve 25 is connected, and the gas phase valve 20a and the third valve 23 of the storage gas cylinder 20 are connected to each other.

When the connection is made in this way, the first valve 21, the second valve 22, the third valve 23 to open the vacuum to exhaust the gas remaining in the storage gas cylinder 20 to make a vacuum state The pump 22 is operated to extract the gas remaining in the storage gas cylinder 20.

After the vacuum operation of the storage gas cylinder 20 is checked whether the ignition of the automatic ignition unit 40, if the ignition is not possible, it is possible to confirm that the storage gas cylinder 20 is in a vacuum state.

When the storage gas cylinder 20 is checked for vacuum, the first valve 21 is blocked, and the fourth valve 24 and the fifth valve 25 are opened to release fuel in the fuel tank 10 due to the pressure difference. It is possible to recover to the storage gas cylinder 20.

That is, since the fuel tank 10 is initially in a high pressure state, and the storage gas cylinder 20 is a vacuum state, the fuel is moved to the storage gas cylinder 20 by the pressure difference, and this process is performed by the fuel tank 10. It advances until the pressure inside and the pressure in the storage gas cylinder 20 are the same.

Once the pressure in the fuel tank 10 and the storage gas cylinder 20 are equal, the remaining amount of gas remaining in the fuel tank 10 is exhausted to the outside for processing. That is, the second valve 22 and the third valve 23 are closed, and the first valve 21, the fourth valve 24, and the fifth valve 25 are opened and the fuel is discharged by the vacuum pump 30. The gas remaining in the tank 10 is withdrawn.

Whether the fuel in the fuel tank 10 is completely discharged can be confirmed through the ignition of the automatic ignition unit 40 as well.

The process of recharging after the maintenance of the fuel tank 10 is likewise recharged by the pressure difference between the fuel tank 10 and the storage gas cylinder 20 after the fuel tank 10 is vacuumed. .

However, such a conventional liquefied gas recovery and refilling device transfers fuel by using a pressure difference from the fuel tank of the vehicle after the storage gas cylinder is vacuumed by using a vacuum pump. Therefore, when a certain amount of fuel is moved to the storage gas cylinder and the storage gas cylinder and the fuel tank are at the same pressure, no more fuel is moved to the storage gas cylinder. Therefore, fuel remains in the fuel tank at all times. The remaining fuel in the fuel tank is taken out.

In addition, since the fuel is recovered or filled using only the pressure difference between the fuel tank and the storage gas cylinder, the fuel moves quickly when the pressure difference is large initially, but as the pressure difference decreases, the fuel movement speed decreases. Therefore, the recovery and filling time of the fuel takes a long time, which causes a problem of deterioration of the work efficiency.

The present invention is to solve the above-mentioned drawbacks, and to provide a liquefied gas recovery and recharging device in the gas tank for the LPG vehicle that can recover and recharge the fuel of the LPG vehicle fuel tank using a pressure pump.

The present invention is a device for recovering or refilling the fuel filled in the fuel tank of the LPG vehicle to the storage container, comprising: a pressure pump for pressurizing and transporting the fuel of the fuel tank and the storage container; An automatic ignition unit for automatically burning the remaining fuel in the fuel tank or storage container; The fuel tank, the storage container, the pressure pump, and the automatic ignition unit is piped to achieve a valve control unit for controlling the flow of fuel.

1 is a configuration diagram of a conventional liquefied gas recovery and refilling device,

Figure 2 shows a first embodiment of the liquefied gas recovery and refilling apparatus according to the present invention

Showing schematics,

Figure 3 is a second embodiment of the liquefied gas recovery and refilling apparatus according to the present invention

Showing schematic.

Table 1 shows the process of recovering liquefied fuel from a three-neck fuel tank.

Table 2 shows the process for refilling liquefied fuel in a three-neck fuel tank,

Table 3 shows the liquefied fuel recovery process for the four-fuel tank.

Table 4 shows the process for refilling liquefied fuel in a four-fuel tank.

<Explanation of symbols for the main parts of the drawings>

10: fuel tank 11: overfill valve

12: liquid valve 13: gauge

100: control valve 110: pressure pump

120: automatic ignition unit 130: storage container

2 and 3 are related to the apparatus of the present invention, Figure 2 is a block diagram showing a first embodiment of the liquefied gas recovery and refilling apparatus according to the present invention, Figure 3 is a liquefied gas recovery and recharging according to the present invention 2 is a block diagram showing a second embodiment of the apparatus.

A first embodiment of the present invention is described in detail with reference to FIG. 2 as follows.

The liquefied gas recovery and refilling apparatus of the present invention recovers the fuel charged in the fuel tank 10 of the LLP vehicle equipped with the overfill valve 11 and the liquid valve 12 to the storage container 130 or the fuel tank 10. An apparatus for recharging a pressure, comprising: a pressure pump (110) for pressurizing and transporting fuel in the fuel tank (10) and the storage container (130); An automatic ignition unit 120 for automatically burning the discharged fuel remaining in the fuel tank 10 or the storage container 130; The fuel tank 10, the storage container 130, the pressure pump 210 and the automatic ignition unit 120 is connected to the valve control unit 100 to control the flow of fuel.

The fuel tank 10 is a well-known three-pronged LPG fuel tank composed of an overfill valve 11, a liquid valve 12, and a gauge 13, and the overfill valve 11 is for filling liquefied fuel. The above fuel is prevented from being charged.

The liquid valve 12 is connected to a vaporizer provided in the vehicle, and supplies the liquid LPG to the vehicle. The liquid LPG supplied from the liquid valve 12 is converted to gas LPG by depressurizing the vaporizer.

The valve control unit 100 is provided between the liquid valve 12 of the fuel tank 10 and the overcharge valve 131 provided in the storage container 130 to control the flow of fuel. )Wow; A second valve 102 provided between the output end of the pressure pump 110 and the overcharge valve 11 of the fuel tank 10 to control the flow of fuel; A third valve 103 disposed between the output end of the pressure pump 110 and the gas phase valve 133 provided in the storage container 130 to control the flow of fuel; A fourth valve 104 provided between the output end of the pressure pump 110 and the auto ignition unit 120; A fifth valve 105 provided between the input end of the pressure pump 110 and the gas phase valve 133 provided in the storage container 130 to control the flow of fuel; A sixth valve 106 provided between the input end of the pressure pump 110 and the overcharge valve 11 of the fuel tank 10 to control the flow of fuel; The liquid valve 132 of the storage container 130 and the liquid valve 12 of the fuel tank 10 may be provided between the seventh valve 107 for controlling the flow of fuel.

The operation of the liquefied gas recovery and refilling apparatus according to the present invention configured as described above is as follows.

Referring to [Table 1], the work of recovering the fuel from the fuel tank of the vehicle and transferring it to the storage container is performed as follows.

1st valve 2nd valve 3rd valve 4th valve 5th valve 6th valve 7th valve Storage Vacuum Process off off off On On off off Liquid movement process On off off off off off off Pressurization process On On off off On off off Vehicle gas exhaust process off off off On off On off

In the first step, the storage container 130 is vacuumed, and the first valve 101, the second valve 102, the third valve 103, and the sixth valve in the state where the pressure pump 110 operates. 106 and the seventh valve 107 is in an 'off' state, and the fourth valve 104 and the fifth valve 105 are in an 'on' state.

As such, the remaining fuel in the storage container 130 is transferred to the auto ignition unit 120 through the gas phase valve 133 of the storage container 130 to be combusted.

The second step is a process of transferring the LPG liquid fuel of the fuel tank 10 to the storage container 130, only the first valve 101 'on' state, the second valve 102 to the seventh valve (107) ) Is turned off.

In the second step, since the fuel in the storage container 130 is exhausted to the low pressure state through the first step, the liquid valve 12 of the fuel tank 10 in the high pressure state is turned on by turning on the first valve 130. The fuel is moved to the storage container 130 by the pressure difference. In the second step, the pressure pump 110 is not in operation.

In the third step is to pressurize the fuel tank 10 to operate each valve in the same manner as the pressurization process of [Table 1], to operate the pressure pump 110.

As described above, the storage container 130 maintains a low pressure state by operating each valve, and pressurizes the fuel tank 10 through the overfill valve 11 of the fuel tank 10 so that the fuel in the fuel tank 10 It moves to the storage container 130 through the liquid valve (12).

The fourth step is a process for exhausting the remaining amount of gaseous fuel remaining in the fuel tank 10 of the vehicle. When the valves are operated in the same manner as the vehicle gas exhaust process of Table 1, overcharging of the fuel tank 10 is performed. The gaseous fuel discharged through the valve 11 is combusted by the automatic ignition unit 120 via the sixth valve 106, the pressure pump 11, and the fourth valve 104.

By checking the combustion state in the automatic ignition unit 120, it is possible to confirm whether the fuel is completely exhausted in the fuel tank 10.

Through this process, the fuel charged in the fuel tank 10 of the vehicle is recovered to the storage container 130 to safely perform the repair operation of the fuel tank 10 in a state where the fuel in the fuel tank 10 is completely discharged. It becomes the number.

Hereinafter, referring to [Table 2], the process of recharging the fuel stored in the storage tank again in the fuel tank after the repair work of the fuel tank of the vehicle is as follows.

1st valve 2nd valve 3rd valve 4th valve 5th valve 6th valve 7th valve Fuel Tank Vacuum Process off off off On off On off Liquid movement process On off off off off off On Pressurization process On off On off off On On

The fifth step is to allow the fuel tank 10 to be in a vacuum state, so that the pressure difference between the fuel tank 10 and the storage container 130 may be increased to allow the liquefied gas refilling operation to proceed more quickly.

In the vacuum process of the fuel tank, the air in the fuel tank 10 is automatically ignited by operating the pressure pump 110 while maintaining only the fourth valve 104 and the sixth valve 106 in an 'on' state. Exhaust through).

The sixth step is a process of recharging the liquid fuel stored in the storage container 130 to the fuel tank 10. When only the seventh valve 107 is kept in an 'on' state, the fuel tank 10 and the high pressure are in a low pressure state. Due to the pressure difference between the storage container 130 in a state, the liquid fuel of the storage container 130 is filled into the fuel tank 10.

The seventh step is a process of pressurizing the storage container 130 and the pressure pump 110 in a state in which only the third valve 103, the sixth valve 106, and the seventh valve 107 are kept in an 'on' state. When the fuel tank 10 is continuously maintained in a low pressure state, and the storage container 130 is maintained at a high pressure state to be able to recharge the fuel until the fuel tank 10 is full.

A second embodiment of the present invention is described in detail with reference to FIG. 3 as follows.

The liquefied gas recovery and refilling apparatus of the present invention includes an overfill valve 31, a gas phase valve 32, and a liquid valve 33 to store the fuel charged in the fuel tank 30 of the LPI vehicle as the storage container 230. An apparatus for recovering or recharging a fuel tank (30), comprising: a pressurizing pump (210) for pressurizing and transporting fuel of the fuel tank (30) and the storage container (230); An automatic ignition unit 220 for automatically burning the discharged fuel remaining in the fuel tank 30 or the storage container 230; The fuel tank 30, the storage container 230, the pressure pump 210 and the automatic ignition unit 220 is connected to the valve control unit 200 for controlling the flow of fuel.

The fuel tank 30 is a well-known four-pronged LPG fuel tank composed of an overfill valve 31, a gas phase valve 32, a liquid valve 33, and a gauge 34, and the overfill valve 31 is a liquefied fuel. It is to charge the to prevent the filling of more than a certain fuel.

The gas phase valve 32 discharges gaseous fuel, and the liquid phase valve 33 discharges liquid fuel.

The valve control unit 200 is provided between the liquid valve 33 of the fuel tank 30 and the overcharge valve 231 provided in the storage container 230 to control the flow of fuel. )Wow; A second valve 202 provided between the output end of the pressure pump 210 and the gas phase valve 32 of the fuel tank 30 to control the flow of fuel; A third valve 203 provided between an output end of the pressure pump 210 and a gas phase valve 232 provided in the storage container 230 to control a flow of fuel; A fourth valve 204 provided between the output end of the pressure pump 210 and the auto ignition unit 220; A fifth valve 205 provided between the liquid valve 232 provided in the storage container 230 and the overcharge valve 31 of the fuel tank 30 to control the flow of fuel; A sixth valve 206 provided between the input end of the pressure pump 210 and the gas phase valve 233 of the storage container 230 to regulate the flow of fuel; It may be provided between the gas phase valve 32 of the fuel tank 30 and the input end of the pressure pump 210 may be composed of a seventh valve 207 for controlling the flow of fuel.

The operation of the liquefied gas recovery and refilling apparatus according to the present invention configured as described above is as follows.

Referring to [Table 3], the work of recovering the fuel from the fuel tank of the vehicle and transferring it to the storage container is performed as follows.

1st valve 2nd valve 3rd valve 4th valve 5th valve 6th valve 7th valve Storage Vacuum Process off off off On off On off Liquid movement process On off off off off off off Pressurization process On On off off off On off Vehicle gas exhaust process off off off On off off On

In the first step, the storage container 230 is vacuumed, and only the fourth valve 204 and the sixth valve 206 are 'on' as in the first embodiment, and the pressure pump 210 is turned on. By driving, the storage container 230 is brought into a vacuum state.

The second step is a process of transferring the LPG liquid fuel of the fuel tank 30 to the storage container 230 to maintain only the first valve 101 in the 'on' state, the fuel tank 30 in a high pressure state, The liquid fuel in the fuel tank 30 is moved to the storage container 230 by the pressure difference between the storage container 230 in the low pressure state.

In the third step is to pressurize the fuel tank 30 to operate each valve in the same manner as the pressurization process of [Table 3], to operate the pressure pump 210.

In this way, by operating each valve, the gas in the storage container 230 by the pressure pump 210 is exhausted through the gas phase valve 233 is filled with the overfill valve 31 of the fuel tank 30, the storage container 230 Is maintained at a low pressure state, the fuel tank 30 can maintain a high pressure state, so that the liquid fuel filled in the fuel tank 30 is moved to the storage container 230 smoothly.

The fourth step is a process for exhausting the remaining amount of gaseous fuel remaining in the fuel tank 30 of the vehicle. The gaseous fuel discharged through the valve 32 is combusted in the automatic ignition unit 220 via the seventh valve 207, the pressure pump 210, and the fourth valve 204.

By checking the combustion state in the automatic ignition unit 220, it is possible to confirm whether the fuel is completely exhausted in the fuel tank 30.

Through this process it is possible to recover the fuel charged in the fuel tank 30 of the vehicle to the storage container 230.

Referring to [Table 4] below, the process of recharging the fuel stored in the storage tank again in the fuel tank after the repair work of the fuel tank is as follows.

1st valve 2nd valve 3rd valve 4th valve 5th valve 6th valve 7th valve Fuel Tank Vacuum Process off off off On off off On Liquid movement process off off off off On off off Pressurization process off off On off On off On

The fifth step is to allow the fuel tank 30 to be in a vacuum state, so that the pressure difference between the fuel tank 30 and the storage container 230 may be increased to allow the liquefied gas refilling operation to proceed more quickly.

In the vacuum process of the fuel tank, by operating the pressure pump 210 while maintaining only the fourth valve 204 and the seventh valve 207 in the 'on' state, the air in the fuel tank 30 is automatically ignited by the 220. Exhaust through).

The sixth step is a process of recharging the liquid fuel stored in the storage container 230 to the fuel tank 30. When only the fifth valve 205 is maintained in the 'on' state, the fuel tank 30 and the high pressure are in a low pressure state. The liquid fuel stored in the storage container 230 is discharged to the liquid valve 232 of the storage container 230 by the pressure difference between the storage container 230 in a state to open the overcharge valve 31 of the fuel tank 30. It is charged through.

The seventh step is a process of pressurizing the storage container 230 and the pressure pump 210 in a state in which only the third valve 203, the fifth valve 205, and the seventh valve 207 are kept in an 'on' state. When driven, the fuel tank 30 continuously maintains a low pressure state, and the storage container 230 maintains a high pressure state, thereby recharging fuel until the fuel tank is full.

As described above, the liquefied gas recovery and recharging device in the LPP vehicle fuel tank according to the present invention uses a pressurized pump to continuously generate a constant pressure difference between the fuel tank and the storage container of the vehicle so that the work can be performed quickly, thereby improving work efficiency. It is possible to increase and increase the recovery rate of remaining liquid fuel in the fuel tank.

Claims (2)

An apparatus for recovering or recharging a fuel filled in a fuel tank of an LPI vehicle equipped with an overfill valve and a liquid valve to a storage tank, A first valve provided between the liquid valve of the fuel tank and the overfill valve provided in the storage container to control the flow of fuel; A second valve provided between the output end of the pressure pump and the overfill valve of the fuel tank to control the flow of fuel; A third valve provided between an output end of the pressure pump and a gas phase valve provided in the storage container to regulate a flow of fuel; A fourth valve provided between the output end of the pressure pump and the auto ignition unit; A fifth valve provided between an input end of the pressure pump and a gas phase valve provided in the storage container to regulate a flow of fuel; A sixth valve provided between the input end of the pressure pump and the overfill valve of the fuel tank to regulate the flow of fuel; Liquefied gas recovery and refilling device in the fuel tank for the LPG vehicle, characterized in that it is provided between the liquid valve of the storage container and the liquid valve of the fuel tank for regulating the flow of fuel. An apparatus for recovering or refilling a fuel tank with fuel stored in a fuel tank of an LPI vehicle equipped with an overcharge valve, a gas phase valve, and a liquid valve, A first valve provided between the liquid valve of the fuel tank and the overfill valve provided in the storage container to control the flow of fuel; A second valve provided between the output end of the pressure pump and the gas phase valve of the fuel tank to regulate the flow of fuel; A third valve provided between an output end of the pressure pump and a gas phase valve provided in the storage container to regulate a flow of fuel; A fourth valve provided between the output end of the pressure pump and the auto ignition unit; A fifth valve provided between the liquid valve provided in the storage container and the overfill valve of the fuel tank to control the flow of fuel; A sixth valve provided between the input end of the pressure pump and the gas phase valve of the storage container to regulate the flow of fuel; And a seventh valve provided between the gas phase valve of the fuel tank and the input end of the pressure pump to control the flow of fuel.