JP3341273B2 - Refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supply apparatus for facilitating identification of liquid types when a plurality of different liquid types such as gasoline and light oil are supplied by one liquid supply nozzle.

[0002]

2. Description of the Related Art Conventionally, in a gas station, a plurality of different liquid types, such as regular gasoline, high octane gasoline, and light oil, are supplied by one liquid supply nozzle. A liquid supply hose provided with a coupling for connecting a plurality of liquid supply hoses through which respective liquid types flow is used. The present applicant discloses a technique relating to such a liquid supply hose in Japanese Patent Application No. 6-206123, for example.

[0003]

However, in the conventional one in which a plurality of supply hoses are connected to one supply nozzle, the indication of the liquid type at the time of the supply is only provided in the refueling device, and the supply of the liquid is not performed. The liquid type could not be confirmed on the hand side of the nozzle, and there was a risk that the liquid type was mistaken.

Accordingly, an object of the present invention is to provide a liquid supply device capable of confirming a liquid type at a hand side of a liquid supply nozzle.

[0005]

In order to achieve the above object, a liquid supply apparatus according to the present invention comprises a plurality of liquid supply hoses each having one end connected to a plurality of liquid supply systems, and a plurality of liquid supply hoses. A liquid supply comprising a coupling provided at one end with a plurality of liquid supply passages each having an end connected thereto, and one liquid supply nozzle connected to the other end of the coupling and connected to each liquid supply passage. In the device, a check valve is provided in each of the liquid supply passages, and an indicator for indicating the presence or absence of a liquid supply pressure in an upstream liquid supply passage of the check valve is provided in each of the couplings.
And one end of the indicator communicates with the liquid supply passage.
A liquid chamber whose other end is closed by a diaphragm;
The diaphragm is expanded by the indicator provided on the
Transparent or translucent display that touches the display when it comes out
And a window .

It is preferable that characters, symbols or colors for identifying the liquid type are displayed on the display body in order to facilitate confirmation of the liquid type. The plurality of liquid supply hoses may include a relatively hard outer shell hose having a large outer diameter and a plurality of relatively soft inner shell hoses having a small outer diameter housed in the outer shell hose and expand and contract. This is preferable because the liquid supply hose can be integrated into one. It is preferable that the plurality of oil supply hoses include a plurality of single hoses connected to liquid supply systems of different oil types, respectively, in that the configuration can be simplified.

[0007]

According to the liquid supply apparatus of the present invention, one end of the liquid supply hose is connected to a plurality of liquid supply systems, and the other end has a plurality of liquid supply passages communicating with the plurality of liquid supply systems. It is connected to one liquid supply nozzle via a coupling, and a coupling is provided with a check valve in a liquid supply system in each of a plurality of liquid supply passages, and the presence or absence of a liquid supply pressure in a liquid supply passage upstream of the check valve. Display devices to display , and
The display has one end communicating with the liquid supply passage and the other end having a diaphragm.
The liquid chamber closed by the ram and the table provided on the diaphragm
Indication and display when diaphragm swells due to hydraulic pressure
By having a transparent or translucent display window with which the body comes in contact, the type of liquid being supplied can be easily checked at the hand side of the liquid supply nozzle, and when the liquid type to be supplied is changed, This prevents backflow of different liquid types into the hose and prevents mixing of liquid types.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 1 is an external perspective view of a liquid supply device according to an embodiment of the present invention, FIG. 2 is a cut-away sectional view of a liquid supply hose according to an embodiment of the present invention, and FIG. 3 connects a liquid supply hose and a liquid supply nozzle according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the coupling portion, and FIG.
FIG. 5 is a sectional view taken along the line X-O-Z of FIG. 3, and FIG. 6 is an enlarged sectional view of the display portion of the embodiment of the present invention.

In these figures, the liquid supply device of the present embodiment has a liquid supply system having one end connected to a plurality of liquid supply systems, for example, regular gasoline, high octane gasoline, and light oil via a connection portion 30. A coupling 40 connected to the other end of the liquid supply hose 20, a liquid supply nozzle 80 connected to the coupling 40 via an elbow 60 and a swivel joint 70, and the like. Indicators 50a, 50b, and 50c are provided on the outer peripheral surface of the ring 40 to display the type of liquid being supplied.

As shown in FIGS. 2 to 5, the liquid supply hose 20 has a relatively large outer diameter, a relatively hard outer shell 22 and an outer diameter housed in the outer shell 22 having a small outer diameter.
Two relatively soft inner-shell hoses 23a and 23 that contract
b, and different liquids flow through the two inner shell hoses 23a and 23b and the space 23c between the inner shell hoses 23a and 23b and the outer shell hose 22. That is, the liquid supply hose 20 is configured such that the inner shell hoses 23 a and 23 b housed in the outer shell hose 22 are
Are arranged at an angle of, for example, 120 degrees with respect to the center of. The three different liquids supplied from the liquid supply system pass through the inside of the inner shell hoses 23a and 23b and the space 23c between the inside of the outer shell hose 22 and the outside of the inner shell hoses 23a and 23b, respectively. When passing through one inner-shell hose 23a (or 23b), the inner-shell hose 23a (or 23b) is expanded by the supply pressure, and the other inner-shell hose 23b (or 23a) is connected to the outer-shell hose. When the inner hose 22 is crushed by the inner wall and passes through the space 23c between the inner diameter of the outer hose 22 and the outer portions of the inner hoses 23a and 23b, the two inner hoses 2
3a and 23b are crushed.

The liquid supply hose 20 is connected to the discharge pipes 8a, 8b, and 8c of the liquid supply apparatus having a plurality of liquid supply systems.
0. The connecting portion 30 has a through-hole 33a, 33b, 33c formed at an equiangular angle with respect to a center in a connecting fitting 32 formed in a substantially cylindrical shape, and fixed to a side surface of the case 2 or the like of the liquid supply device. Have been. One end of the connection fitting 32 is connected to the end of the outer shell 22 of the liquid supply hose 20, and the through holes 33a and 33b are provided.
Are connected so as to communicate with the inner shell hoses 23a, 23b, respectively, and the through holes 33a, 33b, 33 at the other end side.
c are connected to communicate with the ends of the discharge pipes 8a, 8b, 8c, respectively. That is, the inner diameter side of the inner hose 23a, 23b of the liquid supply hose 20 is communicated with the discharge pipes 8a, 8b through the through holes 33a, 33b, respectively.
The space 23c on the inner diameter side of the outer shell hose 22 is
It communicates with the discharge pipe 8c via 3c.

The coupling 40 has, at one end, the outer shell hose 22 and the inner shell hoses 23a, 23b of the liquid supply hose 20.
And a second connecting portion 42 for connecting to the liquid supply nozzle 80 via an elbow 60 and a swivel joint 70, and are equiangular with respect to the center thereof. Three supply passages 43a, 43
b, 43c are formed. These liquid supply passages 43a,
Check valves 44a, 44c are provided at 43b, 43c, respectively.
b, 44c are provided. The liquid supply hose 20 is the first
An outer shell hose 22 and inner shell hoses 23a and 23b are connected to the end side of the connection portion 41, and the inner shell hoses 23a and 23b
The inner diameter side of 3b communicates with the liquid supply passages 43a, 43b, respectively, and the space 23c of the inner diameter of the outer shell hose 22 communicates with the liquid supply passage 43c. These three liquid supply passages 43a, 43b, and 43c are formed such that the diameter of the second connection portion 42 is enlarged, and a valve seat is formed on the liquid supply hose 20 side of the enlarged diameter portion. Cross-shaped bearing 45 on the 42 side
a, 45b and 45c are formed. Check valve 44
a, 44b, and 44c each have a shaft portion having a bearing portion 45.
a, 45b, and 45c are slidably supported by shafts, and the valve portions thereof are urged and pressed against the valve seats by springs 46a, 46b, and 46c, respectively.
The liquid flows only from the liquid supply nozzle 80 side. The strength of these springs 46a, 46b, 46c depends on the supply pressure of the check valves 44a, 44b,
44c is opened, but depending on the pressure of discharging the residual liquid due to the contraction / expansion of the inner shell hoses 23a, 23b, the check valve 44c is opened.
a, 44b and 44c are set not to open.
Then, three liquid supply passages 43a of the coupling 40,
Radial through-holes 48a, 48b, 48c are respectively formed in the substantially intermediate portions of 43b, 43c toward the outer peripheral surface, and communicate with the respective through-holes 48a, 48b, 48c and have a diameter increasing toward the outside. Liquid chamber 49 opened to
a, 49b, 49c are formed. Indicators 50a, 50b, and 50c are provided in the openings of the liquid chambers 49a, 49b, and 49c, respectively.

The indicators 50a, 50b, 50c are composed of display window plates 51a, 51b, 51c and a diaphragm 52.
a, 52b, 52c and display bodies 53a, 53b, 53c
And springs 58a, 58b, 58c and the like. The display window plate 51 (a, b, c) is formed of, for example, a frosted glass-like transparent plate or translucent plate on the inner surface side.
1 (a, b, c) can be recognized from the outside through the display window plate 51 (a, b, c) when it comes into close contact with the frosted glass surface inside, but the display body 53 (a, b, c) is displayed on the display window plate 51 (a). ,
If the user moves away from b, c), it cannot be recognized from the outside. The diaphragm 52 (a, b, c) is formed in a dish shape made of, for example, elastic plastic or a thin metal plate, and is placed at the opening of the liquid chamber 49 (a, b, c) and placed thereon. Display window plate 51 (a, b, c) placed
At the same time, the cover 54 (a, b, c) is attached to the outer periphery of the coupling 40 by a holding screw 55. Further, when hydraulic pressure is applied from the through hole 48 (a, b, c) on the rear surface, the diaphragm 52 (a, b, c) becomes a display body 53.
(A, b, c) is pressed against the inner surface of the display window plate 51 (a, b, c).
b, c) has a restoring force together with the spring 58 (a, b, c) so as to separate from the inner surface of the display window plate 51 (a, b, c). , C)
Are formed with small air holes 57 (a, b, c) communicating between the air chamber 56 (a, b, c) and the outside. The air chamber 56 (a, b, c) of the diaphragm 52 (a, b, c)
The display body 53 (a, b, c) provided on the c) side has a liquid type passing through each liquid supply passage 43 (a, b, c), for example,
Characters, symbols, colors, and the like indicating liquid types such as regular gasoline, high octane gasoline, and light oil are displayed.

Next, a liquid supply apparatus using the liquid supply hose 20 having the above-described configuration will be described. FIG. 7 is a schematic overall configuration diagram of the liquid supply device according to the embodiment of the present invention.

Referring to FIG. 1, a liquid supply device 1 according to the present embodiment comprises:
For example, high octane gasoline, regular gasoline,
This is a fixed-type liquid supply device on the ground for supplying light oil, etc.
In the case 2, suction pipes 3a, 3b, 3c for high octane gasoline, regular gasoline, and light oil communicating with the underground tank for each liquid type are set up, and these suction pipes 3a, 3b, 3c are respectively supplied with liquid. Motors 4a, 4b,
The flowmeters 7a, 7b, 7c connected to the liquid supply pumps 5a, 5b, 5c and the flow pulse transmitters 6a, 6b, 6c, respectively, are provided.
Discharge pipes 8a, 8b, 8c are connected to outlets of b, 7c, respectively. By-pass pipes 9a, 9b and 9c are provided between the suction ports and the discharge ports of the liquid supply pumps 5a, 5b and 5c, respectively.
a, 9b, and 9c respectively have relief valves 10a, 10b,
10c is provided. These bypass pipes 9a, 9
b and 9c and the relief valves 10a, 10b and 10c, when a liquid type is selected and supplied as described in detail later,
This is for returning the liquid that was supplied before remaining in the liquid supply hose 11. The discharge pipes 8a, 8b, 8c are collectively guided to the side surface of the case 2, and connected to the liquid supply hose 20 through the through holes 33a, 33b, 33c of the connecting portion 30 as described above. Case 2 side, liquid feed hose 20 nozzle hanger 11 to apply a tip liquid supply nozzle 80 is provided, et al is in the vicinity of the nozzle seat 11, the nozzle switch 12 is turned on and off by the desorption of the liquid supply nozzle 80 is Is provided. In addition, a liquid type selection switch 13 for selecting a liquid type to be supplied and an indicator 14 for displaying the supplied amount are provided at an upper portion on the front side of the case 2. Further, a control device 15 is provided in the case 2 to control the respective units based on signals from the flow rate pulse transmitters 6a, 6b, 6c, the nozzle switch 12, the liquid type selection switch 13, and the like, and to display. The display of the container 14 is controlled.

FIG. 8 is a block diagram showing the configuration of the control unit of the liquid supply device according to the embodiment of the present invention. Parts corresponding to those in FIG. 7 are denoted by the same reference numerals.

In FIG. 1, a control unit 15 includes a motor control means 16 for controlling the liquid supply motors 4a, 4b, 4c based on signals from the nozzle switch 12 and a liquid type selection switch 13, and a control unit for the nozzle switch 12. Integrating means 17 for integrating the respective signals of the flow rate pulse transmitters 6a, 6b, 6c, which are returned to zero by a signal, and display driving means 18 for driving the display 14 based on the integration result of the integrating means 17; Consists of This integrating means 17 not only integrates the positive pulses of the flow rate pulse transmitters 6a, 6b, 6c corresponding to the type of liquid to be refueled, but also causes the liquid in the liquid supply hose 20 to simultaneously operate the relief valves 10a, 10b, 10c. When returning to the underground tank from any of the bypass pipes 9a, 9b, 9c through the corresponding flow pulse transmitters 6a, 6b, 6c
The negative pulse indicated by is also integrated.

Next, the operation of the liquid supply device and the liquid supply hose having the above-described configurations will be described. 9 is a flowchart illustrating the operation of the liquid supply device according to the embodiment of the present invention. FIG. 10 is a cross-sectional view of a liquid supply hose illustrating a state in which high-octane gasoline flows in the liquid supply device according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of a liquid supply hose illustrating a state in which light oil flows in the liquid supply device according to the embodiment of the present invention.

In FIG. 9, first, the liquid supply nozzle 80 is removed from the nozzle holder 11, the nozzle switch 12 is turned on (ST1), and any of the high octane gasoline, regular gasoline and light oil types of the liquid type selection switch 13 is switched. When the selection is made (ST2 to ST4), the motor control means 16 turns on one of the liquid supply motors 4a, 4b, and 4c of the selected liquid type, and at the same time, the previous liquid supply amount of the integrating means 17 is reset. 14 is returned to zero (ST5). During liquid supply, the integrating means 17 integrates the plus and minus pulse signals of the flow rate pulse transmitters 6a, 6b, 6c (ST6), and the integrated means is displayed on the display 14 by the display driving means 18 (ST6).
7). When the liquid supply ends and the nozzle switch 12 is turned off (ST8), the driving of the liquid supply pump is stopped (ST9), and the process ends.

That is, in the liquid supply hose 20 having the above-described structure, two relatively soft inner shell hoses 23a and 23b are housed in a relatively hard outer shell hose 22. The shell hoses 23a, 23b are connected to the discharge pipes 8a, 8b, respectively, the outer shell hose 22 is connected to the discharge pipe 8c, and the other end is connected to the elbow 60 from the check valves 44a, 44b, 44c by the coupling 40, respectively.
And one of the liquid supply nozzles 80 through the swivel joint 70, so that when any of high octane gasoline, regular gasoline, or light oil is selected, the liquid supply pump 5 of the selected liquid type ( a,
b, c) are driven by the liquid supply motor 4 (a, b, c), pass through either the inner shell hoses 23a, 23b of the liquid supply hose 20 or the outer shell hose 22, and further the check valve 4
The liquid is discharged from the liquid supply nozzle 80 through 4 (a, b, c). At this time, for example, when high-octane gasoline is selected in the supply hose 20, as shown in FIG. 10, high-octane gasoline flows into the inner shell hose 23a and expands, but when regular gasoline flows, as shown in FIG. The shell hose 23b is crushed and contracted, and when light oil is selected, as shown in FIG. 11, the inner shell hose 23a through which high octane gasoline flows and the inner shell hose 23b through which regular gasoline flows are both crushed and contracted. are doing. Therefore, three types of liquid supply are possible with one liquid supply hose 20, and the structure is also simplified.

In the liquid supply apparatus 1 using the liquid supply hose 20 having the above-described structure, the expansion and contraction of the inner-shell hoses 23a and 23b is performed based on a flow pulse transmitter of only the type of liquid to be supplied. In the liquid amount display, an error occurs between the actual liquid supply amount. However, the check valve 44 (a, b,
c) is provided and the supply pump 5 (a, b,
In c), no liquid pressure is generated, and the liquid remaining in the liquid supply hose 20 is discharged to the corresponding discharge pipes 8 (a, b, c) and the flow meter 7.
(A, b, c), the bypass pipe 9 (a, b, c), and the suction pipe 3 (a, b, c). By subtracting the negative pulses generated in b and c) by the integrating means 17, the actual liquid supply amount and the liquid supply amount displayed on the display 14 can be matched.

Next, the display device 50 (a, b,
c) The operation will be described. First, in a state where liquid is not supplied, the liquid does not flow into any of the two inner hoses 23a and 23b of the liquid supply hose 20 and the space 23c of the outer shell hose 22, and the diaphragm 52 of the liquid chambers 49a, 49b and 49c. (A,
Since no hydraulic pressure is applied to the rear side of the diaphragms 52 (a, b, c), the diaphragms 52 (a, b, c) and the springs (a, b, c)
The display body 53 (a, b, c) is separated from the display window plate 51 (a, b, c) by the elastic force of the above, and the liquid type is not displayed.

Next, in order to supply the liquid, any one of high octane gasoline, regular gasoline, and light oil is selected and liquid supply is started. When the liquid supply is started, the two inner shell hoses 23a, 23b of the supply hose 20 or The selected liquid is supplied to one of the space portions 23c of the outer shell hose 22 from the liquid supply system. At this time, in the liquid supply hose 20, two relatively soft inner-shell hoses 23a and 23b housed in a relatively hard outer-shell hose 22 and a space 23c of the outer-shell hose 22 are provided.
However, in the first connection portion 41, the liquid supply passages 43a,
43b and 43c, and are connected to the check valves 44a and 44c.
b and 44c, the second connection portion 41 communicates with one liquid supply nozzle 80 via the elbow 60 and the swivel joint 70, so that a selected liquid type of high octane gasoline, regular gasoline or light oil is supplied. Liquid hose 2
0 inner shell hose 23a, 23b or space 23c
And the check valve 44 (a, b,
The liquid is discharged from the liquid supply nozzle 80 through c). For example,
In the supply hose 20, when high octane gasoline is selected, the high octane gasoline flows through the inner shell hose 23a and expands, but the inner shell hose 23b through which regular gasoline flows flows is crushed and contracted. Is selected, the inner hose 23a through which high-octane gasoline flows and the inner hose 23b through which regular gasoline flows are both crushed and contracted.

When, for example, high octane gasoline is selected and supplied, liquid pressure is applied to the liquid supply passage 43a through the inner shell hose 23a, and the liquid enters the liquid chamber 49a through the through hole 48a and the diaphragm enters. Hydraulic pressure is applied to the back of 52a. This liquid pressure causes the diaphragm 52a to bulge out against the urging force of the spring 58a, and the display body 53a is pressed against the inner surface of the display window plate 51a, and is displayed on the display body 53a from outside through the display window plate 51a. Characters, symbols, colors, etc. of tango gasoline can be recognized. This indicates that high octane gasoline is being supplied. In addition, since the air in the air chamber 56 escapes from the ventilation hole 57 to the outside, the diaphragm 52a can be easily deformed.

According to the liquid supply hose device 10 of the present invention having the above configuration, the liquid type indicator 50 provided near the liquid supply nozzle 80 is provided.
(A, b, c) allows the type of liquid being supplied to be confirmed.
Eliminates accidental supply of liquid type. Also, when the type of liquid to be supplied is changed by a check valve 44 (a, b, c) provided in the liquid supply passage 43 (a, b, c) of the coupling 40, it differs from other liquid supply systems. No liquid is mixed.

In the above embodiment, the inner shell hose 23 is used.
a, a liquid supply hose 2 composed of 23b and an outer shell hose 22
Although an example using 0 has been shown, a plurality of independent hoses may be used for each liquid type. In this embodiment,
The example of supplying three kinds of liquids of high octane gasoline, regular gasoline and light oil has been described. However, other liquids can be supplied with the same structure, and two kinds or four or more kinds of liquids are supplied. It goes without saying that you can do it.

Although the preferred embodiment of the present invention has been described, it will be apparent that various modifications and changes can be made without departing from the spirit of the present invention.

[0028]

As described above, in the liquid supply apparatus of the present invention, one end of the liquid supply hose is connected to each of the plural liquid supply systems, and the other end is connected to the plural liquid supply systems. The coupling is connected to one liquid supply nozzle via a coupling having a plurality of liquid supply passages, the coupling is provided with a check valve in a liquid supply system in each of the plurality of liquid supply passages, and a liquid supply passage upstream of the check valve. By providing indicators that indicate the presence or absence of the liquid supply pressure, the type of liquid being supplied can be easily checked at the hand side of the liquid supply nozzle. This prevents the backflow of different liquid types into the hose and prevents the mixing of liquid types.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a liquid supply device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid supply hose according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a coupling portion for connecting a liquid supply hose and a liquid supply nozzle according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along the line YZ of FIG. 3;

FIG. 5 is a sectional view taken along the line XOZ of FIG. 3;

FIG. 6 is an enlarged sectional view of a display unit according to the embodiment of the present invention.

FIG. 7 is a schematic overall configuration diagram of a liquid supply device according to an embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a control device portion of the liquid supply device according to the embodiment of the present invention.

FIG. 9 is a flowchart illustrating the operation of the liquid supply device according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view of a liquid supply hose illustrating a state in which high-octane gasoline flows in the liquid supply apparatus according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of a liquid supply hose illustrating a state in which light oil flows in the liquid supply apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 liquid supply device 2 case 3a, 3b, 3c suction pipe 4a, 4b, 4c liquid supply motor 5a, 5b, 5c liquid supply pump 6a, 6b, 6c flow pulse transmitter 7a, 7b, 7c flow meter 8a, 8b, 8c Discharge pipe 9a, 9b, 9c Bypass pipe 10a, 10b, 10c Relief valve 11 Nozzle hook 12 Nozzle switch 13 Liquid type selection switch 14 Display 15 Control device 16 Motor control means 17 Integration means 18 Display drive means 20 Supply hose 22 Outer shell hoses 23a, 23b Inner shell hose 23c Space 40 Coupling 41 First connection 42 Second connection 43a, 43b, 43c Liquid supply passages 44a, 44b, 44c Check valves 45a, 45b, 45c Bearings 46a, 46b , 46c Spring 50a, 50b, 50c Indicator 51a, 51b, 51 Display window plate 52a, 52b, 52c Diaphragm 53a, 53b, 53c Display body 54a, 54b, 54c Cover 55 Screw 56a, 56b, 56c Air chamber 57a, 57b, 57c Vent hole 58a, 58b, 58c Spring 60 Elbow 70 Swivel joint 80 Liquid supply nozzle

Claims (4)

(57) [Claims] A plurality of liquid supply hoses each having one end connected to a plurality of liquid supply systems; and a coupling provided at one end with a plurality of liquid supply passages to each of which the other end of the liquid supply hose is connected. A liquid supply device having one liquid supply nozzle connected to the other end of the coupling and connected to each liquid supply passage, wherein each of the liquid supply passages is provided with a check valve,
Indicators for indicating the presence or absence of the supply pressure in the upstream supply passage of the check valve are provided on the coupling, respectively.
The indicator has one end connected to the liquid supply passage and the other end
A liquid chamber closed by a diaphragm; and a liquid chamber provided in the diaphragm.
That the diaphragm has swelled due to the display
A transparent or translucent display window with which the display
A liquid supply device. Wherein said display body, a letter that identifies the liquid type, the liquid supply apparatus according to claim 1, wherein the symbol or color is displayed. 3. The plurality of liquid supply hoses include a relatively hard outer shell hose having a large outer diameter and a plurality of relatively soft inner shell hoses having a small outer diameter accommodated in the outer shell hose and expanding and contracting. liquid supply apparatus according to claim 1, wherein comprising a. Wherein said plurality of fuel supply hose, a liquid supply apparatus according to claim 1, wherein comprising a plurality of single hose connected to a different type of oil in the liquid supply system, respectively.