JP3134272B2 - Tank lorry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry provided with an oil-mixing prevention device for preventing oil-mixing during unloading to an oil storage tank of a gas station.

[0002]

2. Description of the Related Art With respect to such an apparatus, the present applicant has disclosed Japanese Patent Application Laid-Open
Japanese Patent Application Laid-Open No. 72093/2003 proposes a technique in which a projection for identifying the oil type is provided at an oil inlet of an oil storage tank, and the oil type is transmitted to the lorry by a wire that appears and disappears.

[0003]

Although the above proposal is effective, the movement of the wire that appears and disappears, and when it becomes old, the movement of the appearance is not smooth, and the identification of the oil type becomes inaccurate. There is a risk.

[0004] An object of the present invention is to provide a tank lorry that always accurately identifies the type of oil and prevents oil mixture.

[0005]

According to the present invention, in a tank lorry equipped with an oil-mixing prevention device for preventing oil-mixing when unloading an oil storage tank at a gas station, a bottom valve opening / closing handle of each hatch of the tank lorry is provided. A valve opening sensor is provided at the end of the common outflow pipe of each hatch, an opening / closing valve is provided at an end of each oil storage tank, and an orifice having a different bleed air amount is provided at a lubrication port of each oil storage tank depending on an oil type. The air hose is provided with a pressure sensor, and the air hose is provided with a pressure sensor, which stores the oil type of each hatch, based on a valve open signal from the valve open sensor and an oil type identification signal from the pressure sensor. A control device for outputting a valve opening enable signal to the on-off valve is provided.

[0006]

[0007] It is preferable that an end of the air hose is provided with an air joint having a valve that opens when connected to the orifice.

It is preferable that the on-off valve is provided with an electromagnetic clutch connected at the time of excitation. The control device is constituted by a microcomputer and mounted in the cab of the tank lorry, and the microcomputer stores a load data, that is, an oil type for each hatch, a valve opening signal of the hatch valve opening sensor and a pressure. It is preferable to provide an oil type determination unit that compares the oil type identification signal from the sensor with the cargo data to determine whether or not the oil types match, and excites the electromagnetic clutch when the oil types match.

[0009]

In the tank lorry configured as described above, when the lubrication hose of the lorry is connected to the lubrication port and the air joint of the air hose is connected to the orifice, the pressure sensor becomes
The reduction of the back pressure due to the bleed air amount of the orifice that differs depending on the oil type is converted into an electric signal and transmitted to the control device. When the bottom valve is opened, the control device compares the oil type from the valve open signal of the valve open sensor and the load data with the oil type signal from the pressure sensor to determine whether or not the oil types match. When they match, the electromagnetic clutch is excited to open the on-off valve, and when they do not match, the on-off valve is not opened without excitation to prevent oil mixture.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, oil storage tanks T1 to T3 (hereinafter referred to as a symbol T are used) are buried on a site A of a gas station, and lubrication pipes 1a to 1c (referred to as a symbol 1 hereinafter). Is communicated to the ground.
For example, the tank T1 stores high-octane gasoline, the tank T2 stores regular gasoline, and the tank T3 stores light oil.

Couplings 2a to 2c (hereinafter, collectively referred to as 2) are provided at the tip of the lubrication pipe 1, and the couplings 2 each have an orifice 3a which is an oil type identification pneumatic pipe described later. Or 3c
(Hereinafter, reference numeral 3 is used when collectively referred to).

On the other hand, the tank lorry R is provided with hatches H1 to H3 (hereinafter, the symbol H is used in the collective term). Is being loaded. These hatches H include bottom valves 4a to 4c which are opened and closed by opening / closing handles 37 (hereinafter, collectively referred to by reference numeral 4) and valve opening sensors 5a to 5c which detect opening and closing of the bottom valve 4 (hereinafter collectively referred to). In this case, reference numeral 5 is used). The outlet side of the bottom valve 4 is communicated with an outflow pipe 6, a coupling 7 is provided at an end of the outflow pipe 6, and a coupling 15 of an oiling hose 8 is connected. A coupling 9 connected to the coupling 2 of the lubricating pipe 1 is provided at the tip of 8.

A control device 4 is provided in the cab of the Rory R.
0 is provided, and the control device 40 stores the cargo data, that is, the oil type of each hatch H. An alarm 38 is provided on the roof, and an emergency valve closing switch 39 is provided near the upper part of the coupling 7.

An air tank 20 is provided above the switch 39, and is connected to an orifice 3a of the coupling 2a by an air hose 22 in the illustrated example. A pressure sensor 21 is provided at a portion of the air hose 22 near the tank 20.

In FIG. 2, an air joint 22a having a valve that opens when connected to the orifice 3 is provided at the end of the air hose 22. The orifice 3 has a different diameter depending on the type of oil in the oil storage tank T, and the flow rate of the bleed air B is different. In FIG. 3, a passage 16 is formed in the coupling 7 so as to bend two times at right angles and open in the opposite direction. One of the openings 16a is connected to the outflow pipe 6, and the other opening 16b is connected to the coupling 15 Are connected.

A main valve 24 seated on the valve seat 19 is provided on the opening 16a side, and is urged by a return spring 25. The distal end of the valve rod 24a of the main valve 24 is in contact with the distal end of an arm 26, and the arm 26 is fixed to a valve operating rod 27 that is supported by the coupling 7.

In FIG. 4, the valve operating rod 27 is
c and a sleeve 29 rotatably inserted into the cover 28. A disk 30 is fixed to the valve operating rod 27, and the disk 30 and the sleeve 2
9 are formed with the electromagnetic clutch 3.
1 are connected.

A boss 32a of a valve opening / closing handle 32 is fixedly provided at an outer end of the sleeve 29, and a torsion spring type return spring 33 is interposed between the handle 32 and the cover 28. I have. An elongated hole 32b is formed at the end of the handle 32, and the elongated hole 32b
The other end of an L-shaped handle holding lever 34 having one end inserted into a through hole 32d formed in the protrusion 32c of the handle 32 is inserted. The lever 34 is urged toward the sleeve 29 by a spring 35 interposed between the lever 34 and the projecting portion 32c.
8 can be inserted into and removed from the through hole 28a. Although not shown, the cover 28 has another through hole for holding the handle 32 at the valve open position. Also, a transparent plate 36 is provided on the boss 32a of the handle 32,
A part of the valve operating rod 27 facing the transparent plate 36 is provided with the main valve 2.
A marking line 27a for visually checking the open / closed state of No. 4 is provided.

In FIG. 5, a control unit 40 is constituted by a microcomputer, and has storage means 41 for storing cargo data, that is, an oil type for each hatch, and each valve opening sensor 5.
Is compared with the oil type signal from the pressure sensor 21 and the cargo data stored in the storage means 41 to determine whether or not the oil type matches. 38, and when they match, the electromagnetic clutch 31
Type judging means 42 for exciting the oil, and an emergency valve closing switch 39
Emergency closing means 43 for deenergizing the electromagnetic clutch 31 in response to a signal from the controller.

For lubrication, the coupling 15 is connected to the coupling 7, the coupling 9 is connected to, for example, the coupling 2a, and the air joint 22a of the air hose 22 is connected to the orifice 3a. Then, the pressure sensor 21 detects a different back pressure due to the bleed air amount of the orifice 3a, and outputs an electric signal of the detected back pressure to the control device 40 via a signal line (not shown). When the bottom valve opening / closing handle 37 is turned to open the bottom valve 4a, the valve opening sensor 5a outputs a hatch bottom valve opening signal. The oil type determination means 42 of the control device 40 selects the oil type of the hatch from the hatch bottom valve open signal and the cargo data stored in the storage means 42, compares the oil type of the hatch with the oil type signal from the pressure sensor 21, It is determined whether or not the oil type of the tank T1 matches the oil type of the hatch H1. If they match (they match in the case shown), the electromagnetic clutch 3
1 is excited, and if they do not match, the electromagnetic clutch 31
The alarm 38 is actuated without energizing to notify the operator to prevent oil mixture.

Next, when the lever 34 is pulled out from the through hole 32d and the valve opening / closing handle 32 is rotated, the sleeve 29 is excited by the electromagnetic clutch 31 so that the disk 30
, The valve operating rod 27 rotates and the arm 2
6, the valve rod 24a moves rightward, the main valve 24 is opened, and lubrication is performed. At this time, the end of the lever 34 is
And the valve opening / closing handle 32 is held at the valve open position. When the lubrication is completed, the lever 34 is pulled back to return the valve opening / closing handle 32, the main valve 24 is closed, the couplings 15, 7, 9 and 2 are removed, and the lubrication is completed. In order to stop lubrication during unloading, if the emergency valve closing switch 39 is pressed, the electromagnetic clutch 31 is deenergized and the main valve 2 is turned off.
4 is closed by the return spring 25.

[0023]

[0024]

As described above, according to the present invention, the following excellent effects can be obtained. (A) Since the conventional discriminating means based on air pressure, which is not a mechanical means such as a wire that appears and disappears, there is no malfunction due to breakage or the like, and the oil type can always be accurately identified and oil mixture can be prevented. (B) It is only necessary to prepare orifices having different bleed air amounts, and the object can be achieved with a simple configuration in which the diameter of the orifice is changed. (C) The lubricating hose may be provided with one air hose, and the lubricating hose has good flexibility and detachability at the time of replacement.

[Brief description of the drawings]

FIG. 1 is a side view showing a tank lorry and a gas station implementing the present invention.

FIG. 2 is a side view showing the vicinity of an air hose and a lubrication port.

FIG. 3 is a side sectional view showing a periphery of a coupling of a lorry.

FIG. 4 is a side sectional view showing an opening / closing mechanism of a main valve.

FIG. 5 is a control block diagram of a control device.

[Explanation of symbols]

 B: Bleed air H1 to H3: Hatch R: Tank lorry T1 to T3: Oil storage tank 1a to 1c: Lubrication pipe 2a to 2c: Coupling 3a to 3c: Orifice 4a ... 4c ... bottom valve 5a-5c ... valve open sensor 6 ... outflow pipe 7, 9 ... coupling 8 ... lubrication hose 20 ... air tank 21 ... pressure sensor 22 ...・ Air hose 22a ・ ・ ・ Air joint 24 ・ ・ ・ Main valve 27 ・ ・ ・ Valve operating rod 31 ・ ・ ・ Electromagnetic clutch 32 ・ ・ ・ Valve opening / closing handle 37 ・ ・ ・ Bottom valve opening / closing handle 40 ・ ・ ・ Control device 41 ・..Means for determining oil type

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B67D 5/32 B60P 3/22 B60S 5/02

Claims (1)

(57) [Claims] 1. A tank lorry equipped with an oil-mixing prevention device for preventing oil-mixing when unloading an oil storage tank at a gas station, wherein a valve opening sensor is provided on a bottom valve opening / closing handle of each hatch of the tank lorry. An opening / closing valve is provided at the end of the common outflow pipe, and an orifice having a bleed air amount different depending on the type of oil is provided at an oil inlet of each oil storage tank, and an air hose connected to the orifice is connected to an air tank provided on a tank lorry. Is provided with a pressure sensor, stores an oil type for each hatch, and outputs a valve open enable signal to the on-off valve based on a valve open signal from the valve open sensor and an oil type identification signal from the pressure sensor. A tank lorry characterized by being provided with a control device that performs the control.