JP2004284612A - Liquid feed controller for use in tank truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid feed controller for use in a tank truck capable of automatically dividing and supplying an oil in one of tank chambers of the tank truck to separate underground tanks when unloading the oil in the truck loaded at a petroleum base to a gas station of a delivery destination. <P>SOLUTION: The liquid feed controller consists of a liquid level sensor 2 placed on a liquid level position of a predetermined amount of a liquid in the tank chamber 5 of the tank truck A, an open/close valve 3 placed on a conduit communicating with an outlet of the tank chamber 5, and a controller 4 for inputting a detection signal from the liquid level sensor and controlling the valve 3 to open/close. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid supply control device for a tank truck used for delivering fuel oil such as gasoline from a petroleum base to a gas station.
[0002]
[Prior art]
Conventionally, when unloading fuel oil, such as gasoline, loaded on a tanker truck at an oil base, especially at a gas station, it was necessary to meet the manager of the gas station before, and the manager and the driver of the tanker truck had to meet. Unloading was carried out while securing safety through joint work of recent years.However, in recent years, regulations have been relaxed to allow only a truck lorry driver to unload cargo when certain safety measures are taken at facilities at the gas station. Made possible.
[0003]
As a result, at the request of both the unloading work on the gas station side during non-business hours and the unloading work on the delivery side during periods of low traffic volume, the driver of the tank lorry truck will be able to perform the unloading work alone by night. became.
[0004]
The tank lorry used for unloading by one driver has a tank structure in which the tank chamber is divided into several chambers having a capacity of 2 KL or 4 KL as shown in FIG. For example, in principle, gasoline, light oil, kerosene, etc. are loaded at a petroleum base according to the request of a gas station that is an unloading destination and then delivered, and the oil in each tank room is always empty when unloading.
[0005]
Therefore, as shown in FIG. 5, for example, a total of 8 KL of gasoline in the first, second and third chambers, 2 KL of kerosene in the fourth chamber, and 4 KL of light oil in the fifth chamber, as shown in FIG. If, for example, a request was made to unload 4 KL of light oil in the fifth room into separate underground tanks, 2 KL each, the driver climbed up the tank of the car and graduated with a scale called scale. The rod was occasionally inserted into the tank of the fifth chamber to measure the amount, and at about 2 KL, the valve handle a at the top of the tank was turned to close the valve at the outlet of the fifth chamber.
[0006]
As an alternative to this method, there is a method of installing a liquid level sensor that knows the supply amount by linking an instrument mechanism with a float in an underground tank containing light oil supplied from a tank truck (see, for example, Patent Document 1). ).
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 8-128879 (FIG. 1)
[0008]
[Problems to be solved by the invention]
In the case of a gas station before deregulation, the responsible person was at the meeting of the responsible person, and when performing the dividing work using the measuring rule by joint work, the driver was dedicated to measurement and opening and closing of the outlet valve on the tank truck, and the responsible person was Since the amount of oil in the underground tank was checked near the underground tank, accurate measurement was possible and accidents such as overflow could be prevented. When performing the work of shaving, it is dangerous to climb alone on a tank truck at night, and it is difficult to check the scale of the measuring scale because of the nighttime. The method of knowing the amount is as follows: even if the supply from the tank truck is stopped by knowing that the predetermined supply amount has been reached by the liquid level sensor, the hose from the tank truck to the underground tank can be used. Diesel oil is a problem that can not be accurately supplied is excessively supplied.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to solve these problems and to provide a highly safe liquid supply control device for a tank lorry, which can automatically and precisely supply a predetermined amount of divided supply.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a liquid level sensor installed at a liquid level position of a predetermined liquid amount in a tank chamber of a tank truck, and an opening / closing valve interposed in a pipe communicating with an outlet of the tank chamber. And a control device for inputting a detection signal from the liquid level sensor and controlling the opening and closing of the opening and closing valve.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIGS.
[0012]
In FIG. 1, reference numeral 1 denotes a liquid supply control device for a tank truck, and the liquid supply control device 1 is provided at a liquid level position of a predetermined liquid amount in each tank chamber 5 of a tank structure divided into rooms on the tank truck A. The installed liquid level sensor 2, an on-off valve 3 composed of an electromagnetic valve respectively interposed in a pipe communicating with the outlet of each tank chamber 5, and a detection signal of the liquid level sensor 2 input to open and close the on-off valve 3. And a control device 4 for controlling opening and closing.
[0013]
As shown in FIG. 2, the liquid level sensor 2 includes a foam float 2a having a built-in permanent magnet 2b, a guide pipe 2d in which the foam 2a is inserted so as to be movable up and down, and formed of a metal pipe such as stainless steel. And a switch 2c comprising a magnetically responsive reed switch provided in the guide tube 2d.
[0014]
As shown in FIG. 3, each of the foam floats 2a is made of a foam of independent closed cells so as not to lose buoyancy due to vibration or the like during running of the tank truck. The foam float 2a has conductivity by mixing a raw material of 2a, for example, carbon powder, which is a nonmetallic conductive material, into nitrile rubber.
[0015]
The switch 2c is connected to a control device 4 to be described later by a signal line 2g, and upper and lower limit float stoppers 2e for restricting the movement of the foam float 2a are provided on the outer periphery of the guide tube 2d. 2f is fitted.
[0016]
The guide tube 2d is grounded to the vehicle body in order to eliminate static electricity generated in the foam float 2a. At the time of unloading, the guide tube 2d is electrically connected to a tank lorry vehicle ground terminal and a tank lorry vehicle body. When the vehicle is running, a conductive rubber belt is dropped on the road surface to remove static electricity.
[0017]
Further, the float stoppers 2e and 2f may be formed of a conductive material.
[0018]
The on-off valve 3 is an on-off valve 3a, 3b, 3c, 3d, which is interposed in a pipe communicating with a lower outlet of each of the tank chambers 5a, 5b, 5c, 5d, 5e of the tank truck A in FIG. 3e, a refueling port 8 is formed at the end on the outlet side of each of these pipelines, and the underground tank 7 of the gas station is refueled from the refueling port 8 by the unloading hose 6.
[0019]
In addition, for the liquid level sensor 2, the switches 2 c are respectively mounted in the guide pipes 2 d at positions corresponding to the liquid levels of the predetermined liquid volumes so as to operate for each predetermined liquid volume in the tank chamber 5. The foam floats 2a for operating the respective switches 2c were respectively inserted into the guide tubes 2d so as to be able to move up and down, and float switches 2I, 2II and 2III were respectively formed by combining these switches 2c and the foam floats 2a.
[0020]
The control device 4 is composed of a microcomputer or the like, as shown in FIG. It is connected to the operation unit 4b. Further, the control device 4 is connected to a plurality of float switches 2I, 2II, 2III arranged at a liquid level position of a predetermined liquid amount in the tank chamber 5, and the open / close valves 3a, 3b, 3c of each tank chamber 5. , 3d and 3e are connected.
[0021]
The control device 4 controls the opening and closing of the on-off valves 3a to 3e of the tank chamber 5 in response to a signal indicating a liquid level position of a predetermined liquid amount in the tank chamber 5 detected by the float switches 2I, 2II, and 2III. . The control device 4 is installed in a driver's seat or the like, and the operation unit 4b can be operated from inside or outside the vehicle.
[0022]
Next, a method of using the liquid supply control device 1 for a tank lorry vehicle according to an embodiment of the present invention will be described with reference to the drawings.
[0023]
The first chamber 5a and the fifth chamber 5e at both ends of the tank chamber 5 of the tank truck A have a capacity of 4 KL each, and the intermediate second chamber 5b, third chamber 5c and fourth chamber 5d have a capacity of 2 KL each. Gasoline is accommodated in the first chamber 5a, the second chamber 5b, and the third chamber 5c and has a total capacity of 8 KL, kerosene is accommodated in the fourth chamber 5d and has a capacity of 2 KL, and light oil is in the fifth chamber 5e. It is assumed that it is requested that the 4 KL light oil in the fifth chamber 5 e be divided into 2 KL and 2 KL and unloaded into separate underground tanks 7 at a gas station.
[0024]
Here, the float switch, which is the liquid level sensor, is disposed at a liquid level position for each 1 KL of liquid in each tank chamber, and the second chamber 5b, the third chamber 5c, and the fourth chamber 5d are located at intermediate positions. The first and second chambers 5a and 5e each have a first level float switch 2I, a second level float switch 2II, and a third level float switch 2I. Each of the three liquid level float switches 2III is arranged in one guide tube 2d, and the liquid level of each tank chamber 5a, 5b, 5c, 5d, and 5e can be detected for each 1 KL.
[0025]
The initial injection amount and the type of oil loaded at the petroleum base are stored in the storage unit 4a, and a refueling section for each underground tank of a gas station is set to a delivery destination by the operation unit 4b.
[0026]
When the gasoline arrives at the delivery destination gas station, the gasoline is connected to the unloading hose 6 to the refueling port 8 of the first chamber 5a, and the underground tank for gasoline is refueled with the entire 4 KL for the first chamber 5a. A total of 8 KL, 2 KL for the second room 5 b and 2 KL for the third room 5 c, are supplied to one underground tank 7, and kerosene is supplied to another underground tank 7 for kerosene, the entire 2 KL of the fourth room 5 d. ]
Next, when the 4 KL light oil in the fifth chamber 5e is divided into separate underground tanks 7 for light oil and supplied with fuel at the request of the gas station, the unloading hose 6 is connected to the oil supply port 8 of the fifth chamber 5e. To the first underground tank 7.
[0028]
The on-off valve 3e is opened by the refueling start operation from the initial injection amount 4KL stored in the storage unit 4a of the control device 4 to start refueling, and the liquid level is lowered, and the detection of the third level float switch 2III is performed. Since the liquid level is 3 KL which does not reach the set value of 2 KL, the on-off valve 3 e is continuously opened and reaches the set value of 2 KL by detection of the float switch 2 II at the second liquid level, and the control device 4 sets the on-off valve 3 e. To automatically stop refueling. Then, the unloading hose 6 of another underground tank 7 for light oil is connected to the oil supply port 8 of the fifth chamber 5e, the refueling start operation is performed, the on-off valve 3 is opened, and the remaining amount of 2 KL of light oil is separated. The underground tank 7 is refueled, and the oil in one tank room is automatically divided and refueled.
[0029]
In the above example, the 4 KL capacity is divided into 2 KL and 2 KL. However, the 3 KL and 1 KL, or the 1 KL and 3 KL or 1 KL are automatically divided by the third liquid level and the first liquid level float switches 2 III and 2 I. In the other tank chambers 5a, 5b, 5c, and 5d, a predetermined supply of KL can be divided and supplied by the same operation as described above.
[0030]
In addition, the float of the liquid level sensor, which is subject to vibration during running of the tank truck, can maintain the buoyancy by using a foam float of closed cells resistant to breakage, and has conductivity by mixing carbon powder. Similarly, static electricity can be removed from the conductive guide tube to prevent the dangerous flammable gas filling the tank chamber from being ignited.
[0031]
【The invention's effect】
As described above, according to the present invention, the conductive liquid level sensor for preventing ignition due to static electricity is installed at a predetermined liquid level in the tank chamber of the tank truck, so that the liquid level in the tank chamber can be reduced without using a measuring scale. Can be automatically divided and supplied, and it is possible to safely and easily perform the unloading division work and the delivery work of the driver alone at night.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a liquid supply control device for a tank truck according to an embodiment of the present invention.
FIG. 2 is a sectional view of a liquid level sensor.
FIG. 3 is an explanatory diagram of a closed cell of a float of a liquid level sensor.
FIG. 4 is a system configuration diagram.
FIG. 5 is an explanatory view of a conventional tank truck.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid supply control device 2 Liquid level sensor 3 On-off valve 4 Control device 5 Tank room

Claims (3)

A liquid level sensor installed at a liquid level position of a predetermined liquid amount in a tank chamber of a tank truck, an open / close valve interposed in a pipe communicating with an outlet of the tank chamber, and a detection signal from the liquid level sensor are input. A control device for controlling the opening and closing of the open / close valve. The liquid level sensor is provided with a conductive float that can move up and down along a conductive guide tube, and a magnet is provided in the float, and when the float reaches a predetermined position, a magnetic sensation in the guide tube is detected. A liquid supply control device for a tank truck, wherein a switch comprising a reed switch is actuated and said guide tube is connected to a static electricity elimination system. 3. The liquid supply control device for a tank truck according to claim 1, wherein the liquid level sensor in the tank chamber is provided at a liquid level position for each predetermined liquid amount.

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