JPH08114589A - Oil kind judging device - Google Patents

Abstract

PURPOSE: To release the internal air of an injection hose when oil is fed to an underground tank, and ensure the detecting operation of an oil kind sensor. CONSTITUTION: An opening and closing valve 34 is provided near the distant feed port of an underground tank, and an oil kind detecting sensor 21 formed of a dielectric sensor 22 and a specific gravity sensor 28 to detect the feed oil kind is provided on the opening end side of the distant feed port over the opening and closing valve 34. An air vent valve 35 is provided on the opening end side of the distant feed port over the opening and closing valve 34, and an air vent piping 42 bypassing the opening and closing valve 34 is provided on the outlet port of the air vent valve 35. Thus, when the injection hose of a tank lorry is connected to the distant feed port, the air filled in the injection hose is released on the underground tank side through an air passage, the oil from the tank lorry is fed into the distant feed port, and the oil detecting sensor 21 is filled with the oil to ensure the oil kind detection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, when supplying an oil liquid such as gasoline to an oil storage tank buried underground in a gas station, distinguishes the type of the oil liquid and mistakenly supplies a different oil liquid. The present invention relates to an oil type discriminating device for preventing the above.

[0002]

2. Description of the Related Art Generally, a plurality of underground tanks are buried underground in a site of a gas station for fueling automobiles and the like, and each underground tank (oil storage tank) contains gasoline, light oil, Plural kinds of oil liquids such as kerosene and LPG are stored respectively.

[0003] Here, when the oil liquid is supplied from the tank truck to the underground tank, an oil liquid different from the oil type of the underground tank may be erroneously supplied due to an incorrect connection of the injection hose. In such a case, different oil liquids are mixed, and the oil liquid in the underground tank cannot be sold, which causes a large loss and causes a dangerous accident.

Therefore, in order to prevent the above-mentioned erroneous refueling of the oil liquid, an on-off valve and an oil type detection sensor are provided in the vicinity of the distant oil refueling port, and the oil liquid injected from the tank truck by the oil type detection sensor. The type of oil is detected to determine whether it is a compatible type, and if it is a compatible type, the on-off valve is opened to allow the injection of oil liquid, and if it is not a compatible type, the on-off valve is closed. For example, an erroneous refueling monitoring device for an underground tank or an oil type discriminating device (hereinafter collectively referred to as an oil type discriminating device) for preventing injection of different oil liquids is disclosed in, for example, Japanese Patent Laid-Open Publication No.
No. 9-102629, JP-A No. 61-95245, and the like.

A conventional oil type discriminating apparatus is shown in FIG.
In the figure, reference numeral 1 denotes an underground tank (only one is shown) as a plurality of oil storage tanks buried in the site of a gas station. In each underground tank 1, gasoline, light oil, Plural kinds of oil liquids such as kerosene are stored respectively. Then, each of the underground tanks 1 has a plurality of oil supply pipes 2 (1
(Only the book is shown) is connected to the ground respectively,
A distant refueling port 3 (only one is shown) on the ground opening end side of each refueling pipe 2 is arranged near a fire wall 4 on the premises of a refueling station. Further, the distant refueling port 3 is provided with a joint 3A for connecting an injection hose 15 of a tank truck 12 described later.

Reference numeral 5 denotes an oil level sensor (only one is shown) provided for each underground tank 1, and each oil level sensor 5 is the remaining amount of the oil liquid stored in each underground tank 1. For example, each oil level sensor 5 is configured as a double cylinder including an inner cylinder and an outer cylinder (neither of which is shown), and is immersed between the inner cylinder and the outer cylinder. By detecting the capacitance of the oil liquid, the oil surface position of the oil liquid stored in each underground tank 1 is measured.

Reference numeral 6 denotes an oil level gauge provided in a building 7 on the premises of the gas station, and each oil level sensor 5 is connected to the oil level gauge 6 via a signal line. The remaining amount of oil liquid in each underground tank 1 is displayed for each underground tank 1 based on the detection signal output from the underground tank 1. The oil level gauge 6 is connected to an oil type determination controller 10 described later via a cable or the like, and transmits data such as the remaining amount of oil liquid in each underground tank 1 to the oil type determination controller 10. ing.

Reference numeral 8 denotes an on-off valve (only one is shown) provided in each oil supply pipe 2 located near each distant oil supply port 3, and each on-off valve 8 is, for example, a normally closed solenoid valve having an explosion-proof structure. It is configured as a butterfly valve. Each on-off valve 8 is connected to an oil type determination controller 10 described later via a cable or the like, and is normally closed to close the distant oil supply port 3. However, a control signal from the oil type determination controller 10 is used. By receiving, the valve is opened and the remote fuel filler port 3 is opened.

Reference numeral 9 denotes an oil type detection sensor (only one is shown) provided in the middle of each refueling pipe 2 located on the opening end side of each refueling port 3 farther than each on-off valve 8. The oil type detection sensor 9 is provided from the tank truck 12 to the underground tank 1
The oil type is detected by measuring the physical quantity such as the dielectric constant, specific gravity, viscosity, or light transmittance of the oil liquid injected toward the oil. Further, each oil type detection sensor 9 is connected to the oil type determination controller 10 via a cable or the like, and the result of the oil type detection is transmitted to the oil type determination controller 10 as a detection signal.

Reference numeral 10 denotes an oil type discriminating controller provided in an explosion-proof box 11 attached to the fire wall 4, and the oil type discriminating controller 10 is provided with a CPU, a memory and the like, and has an MPU (multi-processor) having a storage operation function. The oil level gauge 6 and the oil type detection sensor 9 are connected to the input side via a cable or the like, and the open / close valve 8 is connected to the output side via a cable or the like. Then, the oil type determination controller 10 compares the detection result of the oil type from the oil type detection sensor 9 with the determination value stored in advance in the oil type determination controller 10 to determine whether or not the oil type is compatible. If it is determined that the oil type is compatible, a control signal for opening the on-off valve 8 is output, and if the oil type is not compatible, the on-off valve 8 is kept closed.

Reference numeral 12 denotes a tank truck that supplies oil liquid to each underground tank 1. Inside a transportation tank 13 mounted on the tank truck 12, oil solutions such as gasoline, light oil, and kerosene are mixedly mounted. In addition, an injection hose 15 is attached to the transportation tank 13 of the tank truck 12 via an internal pipe 14.
And a sluice valve 16 is provided between the injection hose 15 and the internal pipe 14. Then, when the oil liquid is supplied from the tank truck 12 to the underground tank 1, the injection hose 15 is connected to the joint 3A of the remote fuel filler port 3 and then the sluice valve 16 is manually opened as shown in FIG. Let me speak.

According to the oil type discriminating apparatus of the prior art constructed as described above, when the oil liquid is supplied from the tank truck 12 to the underground tank 1, first, the injection hose 15 of the tank truck 12 is connected to the distant oil supply port 3. Connected to the joint 3A, the main valve (not shown) provided in the transportation tank 13 is opened. As a result, the oil liquid in the transport tank 13 is transferred to the internal pipe 1
4 and reaches the inflow side of the gate valve 16 in the closed state.

Next, when the gate valve 16 is manually opened,
The oil liquid flows through the injection hose 15 and is injected into the remote fuel filler port 3. At this time, since the open / close valve 8 is closed, the oil liquid stays in the oil type detection sensor 9 provided on the inflow side of the open / close valve 8.

At this time, the oil type detection sensor 9 detects the type of the oil liquid, and the oil type determination controller 10 determines whether or not the oil type is compatible. When the compatible oil type is used, the control signal is output from the oil type determination controller 10 to the open / close valve 8 to open the open / close valve 8, and the oil liquid is injected into the underground tank 1. On the other hand, when it is not the compatible oil type, the closed state of the on-off valve 8 is maintained,
The oil liquid is prevented from being injected into the underground tank 1 to prevent mixing of oil.

[0015]

By the way, according to the above-mentioned prior art, as shown in FIG. 6, the injection hose 15 of the tank truck 12 is connected to the joint 3A of the remote fuel filler port 3 and the sluice valve 16 is opened. Transport valve 1 by valve
The oil liquid L in 3 circulates in the injection hose 15 and reaches the distant refueling port 3 and the oil type detection sensor 9. At this time,
Since the on-off valve 8 provided near the distant refueling port 3 is always closed, the oil liquid L stays on the inflow side of the on-off valve 8.

Here, the sluice valve 1 of the tank truck 12
As shown in FIG. 6, the position 6 (height from the ground) is higher than the position of the opening end of the distant fuel filler port 3, and the injection hose 15 is connected to the distant fuel filler port 3 from the tank truck 12. Between them, they are connected in a state in which they are tilted downward and extend almost straight. In this way, in the state shown in FIG. 6, the oil liquid L is fed from the tank truck 12 side to the remote fuel filler port 3
It surely flows in the injection hose 15 toward and reaches the far oil filler port 3 and the oil type detection sensor 9.

However, as shown in FIG. 7, an injection hose 15 connecting the tank truck 12 and the remote fuel filler port 3 is connected.
When there is slack in the filling hose 15 and the filling hose 15 hangs down to a position lower than the opening end of the distant refueling port 3 in the middle thereof, the oil liquid L flowing out from the tank truck 12 has an oil level L1 in the middle of the filling hose 15. It stays at the position of and does not reach the distant refueling port 3. This occurs because there is no escape route for the air G existing inside the tip end side of the injection hose 15. As a result, since the oil liquid L does not reach the oil type detection sensor 9, there is a problem that the oil type cannot be detected, and as a result, the oil supply work of the oil liquid L cannot be performed.

That is, before the injection hose 15 of the tank truck 12 is connected to the joint 3A of the remote oil supply port 3 and the sluice valve 16 is opened, the injection hose 15 and the oil type detection sensor 9 are connected.
The inside of the etc. is filled with air. Further, since the sluice valve 16 is closed on the proximal end side of the injection hose 15 and the opening / closing valve 8 is closed on the distal end side of the injection hose 15, the inside of the injection hose 15 is almost sealed. Injection hose 15
The air filled inside has no escape route.

Even in such a state, as shown in FIG. 6, if the injection hose 15 is connected between the tank truck 12 and the distant fuel filler port 3 while being tilted downward and extending almost straight, the sluice valve When the valve 16 is opened, the air in the injection hose 15 or the like is reversed from the flow of the oil liquid L in FIG.
It moves in the direction of the arrow inside and is discharged into the transport tank 13. This is because the specific gravity of air is smaller than that of the oil liquid L, and the air naturally moves to a higher position due to buoyancy.

However, as shown in FIG. 7, an injection hose 15 connecting the tank truck 12 and the remote fuel filler port 3 is connected.
In the state where the injection hose 15 is slackened and hangs down to a position lower than the opening end of the distant refueling port 3 in the middle of the slack, the oil liquid L in the injection hose 15 reaches the part where the injection hose 15 hangs down. Arrives, but this oil liquid L
The air G is enclosed between the oil level L1 and the inflow side of the on-off valve 8. As a result, there is a problem that there is no escape path for the air G and the oil liquid L cannot reach the distant refueling port 3.

[0021] Such a problem of the prior art is that when the opening end of the distant refueling port 3 is at a position higher than the oil liquid outlet of the tank lorry 12 (position of the sluice valve 16 or the like). It is a problem that almost certainly occurs.

The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to allow the air inside an injection hose or the like to escape when an oil liquid is injected into an underground tank to store the oil in the oil storage tank. It is an object of the present invention to provide an oil type discriminating apparatus in which the oil liquid is filled in the vicinity of the oil type detecting sensor during refueling of the oil to reliably detect the oil type.

[0023]

In order to solve the above-mentioned problems, the feature of the structure adopted by the oil type discriminating apparatus of the present invention is that an on-off valve is provided in the vicinity of the distant refueling port of the oil storage tank, and Is also located at the opening end side of the distant refueling port, and is provided with an oil type detection sensor that detects the type of refueling oil, and it is determined whether or not the oil type is a compatible oil type by the detection signal from the oil type detection sensor In the device, an air bleed valve is provided at a position farther from the opening / closing valve and closer to the opening end of the fuel filler port.

In this case, as in the second aspect of the invention, an air bleeding pipe that bypasses the on-off valve is provided, one end side of the air bleeding pipe is connected to the outflow port of the air bleeding valve, and the other end side is the above-mentioned. It is preferable to connect to the oil supply pipe from the on-off valve to the oil storage tank.

Further, as in the invention of claim 3, a spacer is provided between the oil supply pipe and the outflow side of the on-off valve, and the other end of the air bleeding pipe is connected to the oil supply pipe through the spacer. It is preferable to connect.

Further, according to the invention of claim 4, the air bleeding valve has a casing having an inflow port on the lower side and an outflow port on the upper side, and a valve chamber formed therein, and a valve of the casing. A valve seat that is located inside the chamber, is formed in the outlet of the casing, and is floatably provided in the valve chamber of the casing, and has a specific gravity smaller than the specific gravity of the oil liquid supplied to the oil storage tank; A valve body that communicates with and cuts off the outflow port by separating from and seating on the valve seat, and provided in the valve chamber,
It is preferable that it is configured with a valve guide that holds the valve element away from the valve seat while air flows through the valve chamber.

[0027]

According to the structure of claim 1, when the injection hose of the tank truck is connected to the distant refueling port of the underground tank, for example, in order to refuel from the tank lorry vehicle to the underground tank, it is provided near the distant refueling port. Since the on-off valve is closed, the filling hose and the like are filled with air. At this time,
The air bleeding valve provided on the opening end side of the fuel filling port farther than the on-off valve is opened, and the air in the injection hose or the like is discharged to the outside through the air bleeding valve. As a result, it is possible to prevent air from being hermetically sealed in the injection hose, etc., and it is possible to reliably feed the oil liquid from the tank truck to the distant refueling port via the injection hose and fill the oil type detection sensor with the oil liquid. .

According to the second aspect of the invention, the air flowing out from the outlet of the air vent valve flows through the air vent pipe and is discharged into the oil supply pipe from the on-off valve to the oil storage tank. As a result, the air filled in the filling hose or the like can be discharged toward the inside of the oil storage tank, and the oil vapor or the like contained in the air filled in the filling hose or the like is discharged to the gas station site. Can be prevented.

According to the third aspect of the invention, since the spacer made of a separate member is provided between the oil supply pipe and the outflow side of the on-off valve, the other end of the air bleeding pipe is provided with a joint or the like at this spacer. It suffices to install it through the air bleeding pipe, which improves the workability of installing the air bleeding pipe.

According to the fourth aspect of the present invention, while the air is flowing into the valve chamber through the inlet of the casing, the valve guide holds the valve element in a state of being separated from the valve seat. As a result, the air bleeding valve is opened and the air is discharged through the outflow port. On the other hand, when the oil liquid flows into the valve chamber via the inflow port of the casing, the valve body floats in the oil liquid by buoyancy and sits on the valve seat. As a result, the air bleeding valve is closed, and it is possible to reliably prevent the oil liquid from leaking through the outflow port.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In the embodiment, the same components as those in the prior art shown in FIG. 5 described above are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, 21 is an on-off valve 34 and a spacer 4 which will be described later.
3 is located farther than 3 and is located on the opening end side of the fuel filler port 3
The oil type detection sensor is provided in the middle of the above, and the oil type detection sensor 21 is roughly composed of a dielectric constant sensor 22, a specific gravity sensor 28, a temperature sensor 33, an air bleeding valve 35, and the like, which will be described later. The oil type detection sensor 21, an on-off valve 34, an air bleeding valve 35, and the like, which will be described later, are provided for each distant refueling port 3, but since they have the same configuration, one of them will be described. .

Reference numeral 22 denotes a dielectric constant sensor. As shown in FIG. 2, each dielectric constant sensor 22 includes an outer cylinder 23 made of a metal cylinder and a metal cylinder provided in the outer cylinder 23. The inner cylinder 24 and the inner cylinder 24 constitute a coaxial cylindrical capacitance sensor. The outer cylinder 23 is flanged together with the on-off valve 34 and the spacer 43 on the inflow side of the oil supply pipe 2 to form a part of the oil supply pipe 2, and the oil liquid is fed from the tank truck 12 to the distant oil supply port 3. When is injected, the oil liquid flows into the outer cylinder 23.

Further, the inner cylinder 24 is accommodated in the outer cylinder 23 by fixing members 25, 25, ... Made of an insulator provided on the peripheral wall of the inner cylinder 24, and a support member 26 made of an insulator provided at the lower end side. It is fixed, and between the inner cylinder 24 and the outer cylinder 23,
A cylindrical gap 27 into which the oil liquid flows is formed. Further, the peripheral wall of the support member 26 has a radial through hole 26.
A, 26A, ... Are provided to prevent oil liquid from accumulating in the gap 27.

Further, the outer cylinder 2 of each dielectric constant sensor 22.
3, the inner cylinder 24 is connected to the oil type determination controller 10 via a lead wire (not shown). Then, when an on-off valve 34, which will be described later, is closed, oil liquid is injected from the tank truck 12 into the distant refueling port 3, and when the oil liquid flows into the gap 27 and is filled, the dielectric constant sensors 22 Detects the capacitance of the oil liquid and outputs the result as a detection signal to the oil type determination controller 10.

Reference numeral 28 denotes a specific gravity sensor, and the specific gravity sensor 2
The numeral 8 is located in the middle of the outer cylinder 23 of the dielectric constant sensor 22 and is provided so as to project in the radial direction from the outer peripheral side of the outer cylinder 23. The lower side of the specific gravity sensor 28 is the oil storage chamber 2
9A, a case 29 in which the upper side is a detector accommodating chamber 29B
And a float 30 provided in the oil storage chamber 29A of the case 29, and a detector 31 provided in the detector accommodating chamber 29B of the case 29. Also,
A mounting hole 29C is formed in the upper surface of the case 29 of the specific gravity sensor 28.
The air vent valve 35 is mounted in the mounting hole 29C.

The float 30 has a cylindrical or rectangular parallelepiped float main body 30A, and the float main body 3
The rod 30B is integrally formed with a rod 30B protruding upward and downward from 0A, and both ends of the rod 30B of the float 30 are slidably supported by support members 32 in the vertical direction. Further, the upper end side of the rod 30B of the float 30 penetrates into the detector accommodating chamber 29B and is connected to the detector 31.

Further, the peripheral wall of the outer cylinder 23 is provided with through holes 23A, 23A, ... Which communicate the inside of the outer cylinder 23 with the oil storage chamber 29A of the case 29 and the inside of the detector accommodating chamber 29B, respectively. Further, the detector 31 is a lead wire (not shown)
It is connected to the oil type determination controller 10 via.

Here, when an oil liquid is injected from the tank truck 12 into the outer cylinder 23 with the opening / closing valve 34 closed, this oil liquid is passed through the circulation holes 23A of the outer cylinder 23 to the case 29. Flowing into the oil storage chamber 29A and the detector accommodating chamber 29B. When the oil storage chamber 29A is filled with the oil liquid, the float 30 floats up due to the buoyancy, and the float 30
The upper end side of the rod 30 </ b> B of the float 30 slides upward by the amount of the floating, and enters the detector 31. As a result, the detector 31 detects the magnitude of the buoyancy of the float 30 and outputs it to the oil type determination controller 10.

Reference numeral 33 denotes a temperature sensor provided inside the outer cylinder 23. The temperature sensor 33 measures the temperature of the oil liquid injected into the outer cylinder 23 and outputs it to the oil type discrimination controller 10. To do. The temperature sensor 33 is provided to perform temperature correction on the dielectric constant detection result of the dielectric constant sensor 22 and the specific gravity detection result of the specific gravity sensor 28.

Reference numeral 34 denotes an on-off valve provided in the vicinity of the distant refueling port 3. The on-off valve 34 is provided on the downstream side of the dielectric constant sensor 22 and provided in the middle of the refueling pipe 2, and the on-off valve according to the prior art. Similar to the example 8, the butterfly valve is composed of, for example, a normally closed solenoid valve having an explosion-proof structure. Each of the on-off valves 34 is connected to the oil type determination controller 10 via a cable, and is normally closed to close the distant oil supply port 3, but receives a control signal from the oil type determination controller 10. By doing so, the valve is opened and the distant refueling port 3 is opened.

That is, when the oil liquid is injected from the tank truck 12 into the distant oil supply port 3, the opening / closing valve 34 is in the closed state, so that the oil liquid stays in the outer cylinder 23. This allows
The oil liquid fills the gap 27 between the inner cylinder 24 and the outer cylinder 23, and fills the oil storage chamber 29A and the detector accommodating chamber 29B of the case 29 through the respective circulation holes 23A formed in the outer cylinder 23. Then, the dielectric constant sensor 22 and the specific gravity sensor 28
The dielectric constant and the specific gravity of the oil liquid are detected by, and the oil type determination controller 10 determines whether or not the oil type is compatible. Then, when the compatible oil type is used, a control signal is output from the oil type determination controller 10 to the on-off valve 34 to open the on-off valve 34, and the oil liquid is injected into the underground tank 1. On the other hand, when it is not the compatible oil type, the closed state of the on-off valve 34 is maintained, and the oil liquid is prevented from being injected into the underground tank 1 to prevent oil mixture.

Reference numeral 35 denotes an air bleeding valve mounted in a mounting hole 29C formed in the upper surface of the case 29 of the specific gravity sensor 28. The air bleeding valve 35 is an outer cylinder 23 as will be described later.
Inside, an air passage consisting of each circulation hole 23A, the oil storage chamber 29A of the specific gravity sensor 28 and the detector accommodating chamber 29B, the air bleeding pipe 42, etc. is provided in the middle of the air passage, and the air passage is connected and cut off.

Reference numeral 36 denotes a cylindrical case which constitutes the outer shell of the air bleeding valve 35, and the cylindrical case 36 is the lower large diameter portion 36.
It is formed in a stepped tubular shape consisting of A and an upper small diameter portion 36B. Further, on the lower end side of the large-diameter portion 36A, a valve guide 40 is provided between the large-diameter portion 36A and an upper mounting portion 37C of a mounting member 37 described later.
Is formed with a supporting step portion 36C for sandwiching the small diameter portion 36C.
The upper end side of B is an outlet 36D to which an air vent pipe 42 described later is attached. Further, in the cylindrical case 36 located between the large diameter portion 36A and the small diameter portion 36B,
A seat portion 36E as a valve seat whose inner diameter is gradually reduced from the lower side to the upper side is formed, and a spherical valve body 41 described later is separated from and seated on the seat portion 36E as shown in FIGS. Thus, the air bleeding valve 35 is opened and closed.

37 is attached to the lower side of the cylindrical case 36,
A mounting member that constitutes a casing together with the tubular case 36 is shown. The mounting member 37 has a large-diameter portion 37A in the axial middle portion, and a lower mounting portion 37B mounted in the mounting hole 29C of the specific gravity sensor 28 on the lower side. The upper side is an upper side mounting portion 37C mounted on the cylindrical case 36. Further, an inflow port 37D is formed on the lower side of the attachment member 37, and an enlarged diameter hole 37E whose inner diameter is gradually increased is formed on the upper side. The attachment member 37 is formed by the inflow port 37D and the enlarged diameter hole 37E. The center part is formed in a substantially annular shape that penetrates. Further, the O-ring 3 is provided on the outer peripheral side of the upper mounting portion 37C of the mounting member 37.
8 are provided. Further, by mounting the mounting member 37 on the tubular case 36, the tubular case 3
A valve chamber 39 is defined in the interior 6.

Reference numeral 40 denotes a valve guide serving as a valve body holding member provided in the valve chamber 39. The valve guide 40 includes a support step portion 36C of the cylindrical case 36 and an upper mounting portion 37C of the mounting member 37. It is composed of a circular flat plate portion 40A sandwiched between the circular flat plate portion 40A and a cylindrical portion 40B which is integrally formed with the circular flat plate portion 40A and is formed in a reverse taper cylindrical shape whose diameter is expanded upward in the valve chamber 39. There is. Then, the valve guide 40 is clamped at the outer peripheral edge of the circular flat plate portion 40A between the support step portion 36C of the cylindrical case 36 and the upper mounting portion 37C of the mounting member 37, so that the valve chamber 39 It is fixed inside. Further, a plurality of inflow holes 40C, 40C, ... Are formed in the circumferential direction on the outer peripheral side of the circular flat plate portion 40A, and a plurality of ventilation holes 40D, 40 are formed on the peripheral surface on the lower end side of the cylindrical portion 40B.
D, ... Are formed.

Since the tubular portion 40B of the valve guide 40 is provided in the valve chamber 39, when air flows through the valve chamber 39, it is between the outer periphery of the tubular portion 40B and the inner wall of the tubular case 36. Serves as an annular throttle portion, and the throttle portion exhibits a Venturi effect to serve as a negative pressure region. As a result, the air in the tubular portion 40B is sucked from each of the ventilation holes 40D, and the spherical valve element 41 described later is obtained.
Are sucked onto the circular flat plate portion 40A. Although the cylindrical portion 40B of the valve guide 40 is formed in an inverse tapered shape, it may be a cylindrical body having the same diameter.

41 is located in the valve chamber 39, and the valve guide 40
A spherical valve element is shown as a valve element that is movably provided in the tubular portion 40B, and the spherical valve element 41 can move upward and downward in the tubular portion 40B as shown in FIGS. The air bleeding valve 35 is opened and closed by separating from and seating on the seat portion 36E of the tubular case 36. That is, as shown in FIG. 3, when the spherical valve body 41 is located below the tubular portion 40B, the air bleeding valve 35 is in the open state. On the other hand, as shown in FIG. 4, the spherical valve element 41 is located above the tubular portion 40B, and the seat portion 3 of the tubular case 36 is
When seated on 6E, the air bleeding valve 35 is closed.

The spherical valve body 41 has a specific gravity set to, for example, about 0.4, and has a buoyancy with respect to an oil liquid such as gasoline (specific gravity 0.72) and light oil (specific gravity 0.82).

Reference numeral 42 denotes an air bleeding pipe for discharging the air flowing out from the air outlet 36D of the air bleeding valve 35 into the oil supply pipe 2. The air bleeding pipe 42 has a connecting portion 42A on one end side.
Is screwed and fixed in the outlet 36D of the tubular case 36, and the other end is attached to a spacer 43 that bypasses the on-off valve 34 and is provided on the outflow side of the on-off valve 34.

Reference numeral 43 denotes a spacer provided by a flange connection between the outflow side of the on-off valve 34 and the oil supply pipe 2, and the spacer 43 is an annular body having an inner diameter substantially the same as that of the oil supply pipe 2. It is formed and forms a part of the oil supply pipe 2. An air inlet 43A is bored in the spacer 43 in the radial direction, and an outlet side end of the air vent pipe 42 is attached to the air inlet 43A by a joint 44. As a result, the air vent pipe 42 is connected to the oil supply pipe 2, and the air vent pipe 42 discharges the air flowing out from the outflow port 36D of the air vent valve 35 into the oil supply pipe 2.

Here, inside the outer cylinder 23, each circulation hole 23A, the oil storage chamber 29A of the specific gravity sensor 28 and the detector accommodating chamber 29B, the air vent pipe 42 and the air inlet 43A of the spacer 43 constitute an air passage, When the injection hose 15 of the tank truck 12 is connected to the distant refueling port 3, the air passage is an escape route for air filled in the refilling hose 15 and the refueling pipe 2 on the opening end side of the refueling port 3 distant from the on-off valve 34. Becomes That is, when the injection hose 15 of the tank truck 12 is connected to the remote fuel filler port 3, the injection hose 15 and the on-off valve 34
The air filled in the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the air passes through the outer cylinder 23, each circulation hole 23A, the oil storage chamber 29A of the specific gravity sensor 28 and the detector accommodating chamber 29B in the direction of arrow A. And flows into the valve chamber 39 of the air bleeding valve 35. And
At this time, the air bleeding valve 35 is opened, and the air is discharged into the refueling pipe 2 through the air bleeding pipe 42 in the direction of the arrow B from the spacer 43 located on the outflow side of the on-off valve 34.

The oil type discriminating apparatus according to the present embodiment has the above-mentioned structure, and the tank lorry vehicle 1 is constituted by the dielectric constant sensor 22, the specific gravity sensor 28 and the temperature sensor 33.
The oil type of the oil liquid injected from 2 is detected, and the oil type determination controller 10 determines whether or not the oil liquid is a compatible oil type. Then, when the compatible oil type is used, the on-off valve 34 is opened to allow the oil liquid to be injected into the underground tank 1. When it is not the compatible oil type, the on-off valve 34 is maintained in the closed state, and the oil liquid is underground. Prevent injection into tank 1.

Next, to explain the operation of the air bleeding valve 35, when the oil solution is to be supplied from the tank truck 12 to the underground tank 1, first, the tank truck 12 is operated.
The injection hose 15 is connected to the remote fuel filler port 3. As a result, the base end side of the injection hose 15 is shut off by the sluice valve 16 in the closed state provided in the tank truck 12, and the tip end side of the injection hose 15 is shut off by the on-off valve 34 in the closed state. The inside of 15 and the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the on-off valve 34 are filled with air.

When the gate valve 16 is opened,
The oil liquid in the transportation tank 13 flows into the injection hose 15. At this time, the air filled in the injection hose 15 and the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the on-off valve 34 is opposite to the flow of the oil liquid L due to the buoyancy of the air, as shown in FIG. Direction (the direction of the arrow in FIG. 6), and as shown by the arrows A and B in FIG. 2, the air flows through the air passage and is discharged into the oil supply pipe 2 located on the outflow side of the on-off valve 34. To be done.

That is, the inside of the injection hose 15 and the opening / closing valve 34.
A part of the air filled in the oil supply pipe 2 on the open end side of the oil supply port 3 farther than the inflows into the outer cylinder 23 so as to be pushed by the oil liquid flowing from the tank truck 12 side, and the outer cylinder 23
23A, the oil storage chamber 29A of the specific gravity sensor 28, and the detector accommodating chamber 29B. And the oil storage chamber 29
The air flowing into A and the detector accommodating chamber 29B flows into the inflow port 37D of the air bleeding valve 35 as indicated by an arrow A in FIG. 3, and passes through the diameter expansion hole 37E and each inflow hole 40C of the valve guide 40. It flows into the valve chamber 39 as indicated by the arrow C in FIG. Further, the air flowing into the valve chamber 39 flows along the outer peripheral side of the tubular portion 40B of the valve guide 40 toward the outlet 36D.

At this time, the spherical valve element 41 is sucked downward in the direction of the arrow C in the tubular portion 40B and separated from the seat portion 36E, so that the air bleeding valve 35 is opened. That is, the inner wall side of the tubular case 36 and the outer peripheral side of the tubular portion 40B are connected to the outflow port 3
The air flowing toward 6D is throttled between them and the flow velocity increases. As a result, the lower side of the tubular portion 40B is surely negative pressure due to the Venturi action, and the spherical valve element 41
As shown in FIG. 3, the state of contacting the circular flat plate portion 40A of the valve guide 40 on the lower side in the tubular portion 40B is maintained.

The air that has flowed into the valve chamber 39 flows into the air vent pipe 42 through the outflow port 36D, and the air in the spacer 43 located on the outflow side of the on-off valve 34 passes through the air vent pipe 42. It is discharged from the air inlet 43A into the oil supply pipe 2. In addition, by providing the air vent pipe 42, it is possible to prevent the air from being discharged to the site of the gas station, and prevent the oil vapor and the like contained in the air from being discharged to the site of the gas station. it can.

In this way, when the air filled in the injection hose 15 and the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the on-off valve 34 is discharged to the outside thereof, the oil liquid is supplied to the outer cylinder 23. The oil liquid flows into the inside of each of the circulation holes 2 of the outer cylinder 23.
It flows into the oil storage chamber 29A and the detector accommodating chamber 29B of the specific gravity sensor 28 via 3A. The oil liquid that has flowed into the oil storage chamber 29A and the detector accommodating chamber 29B is indicated by an arrow in FIG. 4 via the inflow port 37D of the air bleeding valve 35, the diameter expansion hole 37E, and each inflow hole 40C of the valve guide 40. Like E, it flows into the valve chamber 39. At this time, the spherical valve body 41 floats in the direction of the arrow F in FIG. 4 toward the upper side of the air bleeding valve 35 by the buoyancy of the spherical valve body 41 together with the liquid surface of the oil liquid flowing into the valve chamber 39. Then, the user sits on the seat portion 36E. As a result, the air bleeding valve 35 is closed, and it is possible to reliably prevent the oil liquid that has flowed into the valve chamber 39 from flowing out from the outlet 36D to the oil supply pipe 2 side via the air bleeding pipe 42. .

As described above, when the air bleeding valve 35 is closed, the oil liquid that has flowed into the outer cylinder 23 will not flow into the outer cylinder 23.
The gap 27 between the inner cylinder 24 and the inner cylinder 24 is filled up, and the oil storage chamber 29A of the specific gravity sensor 28 is filled up.
2 and the specific gravity sensor 28 and the like detect the dielectric constant and specific gravity of the oil liquid, and the oil type determination controller 10 determines the oil type.

When refueling of the tank truck 12 to the underground tank 1 is completed, the oil liquid in the valve chamber 39 of the air bleeding plate 35 flows from the inlet 37D to the oil storage chamber 2 of the specific gravity sensor 28.
9A and the detector accommodating chamber 29B. This allows
The spherical valve body 41 moves to the lower side of the tubular portion 40B by its own weight and separates from the seat portion 36E to open the air bleeding valve 35.

Thus, according to this embodiment, the outer cylinder 23
Inside, each circulation hole 23A, the oil storage chamber 29A of the specific gravity sensor 28 and the detector accommodating chamber 29B, the air vent pipe 42, and the spacer 43.
Since the air passage is formed by the air inlet 43A, and the air vent valve 35 that allows the flow of air and prohibits the flow of oil liquid is provided in the middle of the air passage, When the hose 15 is connected to the distant refueling port 3, the air filled in the filling hose 15 and the refueling pipe 2 on the opening end side of the refueling port 3 farther than the on-off valve 34 can be released to the outside. As a result, the tank truck 1
The oil liquid sent from 2 via the injection hose 15 can surely reach the distant oil supply port 3 and surely flow into the outer cylinder 23, so that the oil type detection sensor 21 can be filled with the oil liquid.

As a result, according to this embodiment, the permittivity sensor 22 and the specific gravity sensor 28 and the like can reliably detect the permittivity and specific gravity of the oil liquid, and the oil type determination controller 10 can reliably determine the oil type. It can be carried out.
Then, in the case of the compatible oil type, the oil liquid can be reliably injected into the underground tank 1.

Therefore, according to this embodiment, for example, as shown in FIG.
As shown in, there is slack in the injection hose 15 that connects the tank truck 12 and the distant refueling port 3, and the infusion hose 15 hangs down to a position lower than the opening end of the distant refueling port 3 in the middle thereof. Even in the state, the tank truck 12
Oil can be reliably sent from the distant refueling port 3,
When the oil liquid is a compatible oil type, the oil liquid can be reliably injected into the underground tank 1. Further, for example, even when the opening end of the distant refueling port 3 is located at a position higher than the oil liquid outlet of the tank lorry vehicle 12, the oil liquid is surely injected from the tank lorry vehicle 12 into the underground tank 1. be able to.

Further, according to the present embodiment, the air vent valve 35
The spherical valve body 41 is arranged in the cylindrical portion 40B of the valve guide 40 provided in the valve chamber 39 of the cylindrical chamber, and the cylindrical portion is formed by the air flow flowing from the inflow port 37D through the valve chamber 39 toward the outflow port 36D. By generating a negative pressure on the outer peripheral side of 40B and holding the spherical valve element 41 on the lower side in the tubular portion 40B, the air bleeding valve 35 is opened while air is flowing in the valve chamber 39. Can be held in a state. As a result, the air filled in the filling hose 15 and in the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the on-off valve 34 can be reliably discharged to the outflow side of the on-off valve 34.

On the other hand, when the oil liquid flows into the valve chamber 39 of the air bleeding valve 35, the spherical valve body 41 is seated on the seat portion 36E of the cylindrical case 36 by its buoyancy, and the air bleeding valve 35 is closed. Can be made. As a result, it is possible to reliably prevent the oil liquid that has been injected from the injection hose 15 into the remote oil supply port 3 and has flowed into the oil supply pipe 2 from leaking to the outflow side of the on-off valve 34. Therefore, for example, when a different type of oil liquid is injected from the tank truck 12, the different type of oil liquid leaks into the oil supply pipe 2 on the outflow side of the on-off valve 34 via the air bleeding pipe 42 or the like, and the underground tank It can be surely prevented from entering the inside of 1, and the occurrence of oil blending accident can be surely prevented.

Further, a spacer 43 is provided by flange connection between the oil supply pipe and the outflow side of the on-off valve 34, and an air vent pipe 42 is connected to an air inlet 43A of the spacer 43 via a joint 44.
Since the other end is attached, even when the air bleeding pipe 42 is attached to the existing oil supply pipe 2, the oil supply pipe 2 and the opening / closing valve 34 do not need to be separately drilled and the installation workability is improved. be able to.

In the above embodiment, the dielectric constant sensor 2
2, the oil type determination is performed by combining the specific gravity sensor 28 and the temperature sensor 33, but the present invention is not limited to this, and the present invention is not limited to this, and an optical sensor or a supersensor using a light transmittance or a bending rate is used. A configuration may be used in which the type of oil is determined using a sound wave sensor or the like. In this case, the dielectric constant sensor 22, the specific gravity sensor 28, the optical sensor, etc. described above may be provided alone or in combination.

Further, in the above embodiment, the air vent pipe 42 is connected to the outlet 36D of the air vent valve 35, and the air flowing out from the outlet 36D of the air vent valve 35 is discharged from the spacer 43 into the oil supply pipe 2. However, the present invention is not limited to this, and the outflow side end of the air vent pipe 42 is
You may connect in the middle of the ventilation pipe for discharging the vapor (vapor) in the underground tank 1 to the outside air. In addition, in FIG. 2, the outflow side end portion of the air vent pipe 42 may be directly connected to the oil supply pipe 2 and the spacer 43 may be eliminated, as indicated by the alternate long and short dash line. Further, since substantially only air flows out from the air bleeding valve 35, the air bleeding pipe 42 may not be provided and the air outlet 36D side of the air bleeding valve 35 may be opened to the atmosphere.

Further, in the above embodiment, the valve element of the air bleeding valve 35 is the spherical spherical valve element 41, but the present invention is not limited to this, and a cone type valve element or the like may be used as long as it is a poppet valve element. Good.

On the other hand, in the above-described embodiment, the air vent valve 35 is provided in the case 29 of the specific gravity sensor 28, but the present invention is not limited to this, and the air vent valve 35 is refueled farther than the open / close valve 34. It may be located on the opening end side of the mouth 3, and if it is a place where the air filled in the filling hose 15 of the tank truck 12 and the oil supply pipe 2 on the opening end side of the oil supply port 3 farther than the on-off valve 34 can be discharged. It may be provided in another place. For example, the air bleeding valve 35 may be provided directly on the outer peripheral side of the outer cylinder 23.

Further, as shown by the chain double-dashed line in FIG. 2, air is vented between the outer cylinder 23 constituting the oil type detection sensor 21 or the remote oil supply port 3 and the oil supply pipe 2 by bypassing the on-off valve 34. A configuration may be adopted in which the pipe 101 is connected, and an air bleed valve 102, which is an electromagnetic valve, is provided in the air bleed pipe 101. In this case, the air vent valve 35, the air vent pipe 42, etc. in FIG. 2 can be eliminated. Further, the air bleeding valve 102, which is an electromagnetic valve, may be configured to be opened for a certain period of time by a timer or the like during refueling work by the tank truck 12. As the air bleeding valve 102, the float type air bleeding valve 35 shown in FIG. 2 may be used.

[0073]

As described above in detail, according to the invention of claim 1, since the air vent valve is provided at the opening end side of the fuel filler port farther than the on-off valve, for example, from a tank truck to an underground tank. When the injection hose of the tank truck is connected to the distant oil supply port of the underground tank for refueling, the air bleeding valve may be opened to release the air filled in the injection hose. it can. As a result, the oil liquid can be reliably fed from the tank truck to the distant fuel filler port via the injection hose. Therefore, regardless of the height position of the distant refueling port or the slack of the injection hose of the tank truck, the oil type detection sensor can be filled with the oil liquid to reliably detect the oil type, and thus the oil type determination device The reliability can be greatly improved.

Further, according to the invention of claim 2, an air bleeding pipe that bypasses the on-off valve is provided, one end side of the air bleeding pipe is connected to the outlet of the air bleeding valve, and the other end side is the above-mentioned. Since it is configured to be connected to the oil supply pipe from the opening / closing valve to the oil storage tank, the air flowing out from the outlet of the air vent valve can be discharged toward the inside of the oil storage tank via the air vent pipe. Therefore, oil vapor mixed in the air can be discharged to the oil storage tank.

According to the invention of claim 3, the other end of the air vent pipe is connected to the oil supply pipe through a spacer provided between the oil supply pipe and the outflow side of the on-off valve. , The air bleeding pipe can be easily connected to the existing oil supply pipe, and the installation workability can be improved.

Further, according to the invention of claim 4, the valve chamber of the casing has a specific gravity smaller than the specific gravity of the oil liquid to be supplied to the underground tank, and flows by separating from and sitting on the valve seat. Since the valve body that connects and disconnects the outlet is provided in a floating manner, and the valve guide that holds the valve body away from the valve seat is provided while air flows through the valve chamber, the casing While air is flowing into the valve chamber, the air vent valve can be opened to reliably discharge the air to the outside, and when oil liquid flows into the valve chamber of the casing, By closing the drain valve, it is possible to reliably prevent the oil liquid from leaking to the outside.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an oil type discriminating apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an oil type detection sensor, an on-off valve, an air bleeding valve, an air bleeding pipe and the like according to this embodiment.

FIG. 3 is a vertical cross-sectional view showing the air bleeding valve according to the present embodiment in a valve open state.

FIG. 4 is a longitudinal sectional view showing the air bleeding valve according to the present embodiment in a closed state.

FIG. 5 is an overall configuration diagram showing an oil type determination device according to a conventional technique.

FIG. 6 is a configuration diagram showing a state in which an injection hose of a tank truck is connected to a remote fuel filler port without slack.

FIG. 7 is a configuration diagram showing a state in which an injection hose of a tank truck is connected to a distant fuel filler port in a loosened state.

[Explanation of symbols]

 1 Underground Tank (Oil Storage Tank) 2 Oil Supply Piping 3 Remote Oil Supply Port 21 Oil Type Detection Sensor 22 Permittivity Sensor 28 Specific Gravity Sensor 34 Opening Valve 35,102 Air Venting Valve 36 Cylindrical Case (Casing) 36D Outlet 36E Seat (Valve) Seat 37 mounting member (casing) 37D inflow port 39 valve chamber 40 valve guide 41 spherical valve body (valve body) 42, 101 air bleeding pipe

Claims (4)

[Claims] 1. An on-off valve is provided in the vicinity of a distant refueling port of an oil storage tank, and an oil type detection sensor is provided which is located closer to the open end of the refueling port than the on-off valve and detects the refueling oil type. In an oil type discriminating device for discriminating whether or not a compatible oil type is detected by a detection signal from a detection sensor, an air bleeding valve is provided at a position farther to the opening end side of the refueling port than the on-off valve. Oil type discriminating device. 2. An oil bleed pipe that bypasses the on-off valve is provided, one end side of the air bleed pipe is connected to an outflow port of the air bleed valve, and the other end side is an oil supply pipe from the on-off valve to an oil storage tank. The oil type discriminating device according to claim 1, which is connected to the. 3. A spacer is provided between the oil supply pipe and the outflow side of the on-off valve, and the other end of the air bleeding pipe is connected to the oil supply pipe through the spacer. Oil type discriminating device. 4. The air bleeding valve includes a casing having an inflow port on the lower side and an outflow port on the upper side and having a valve chamber formed therein, and a casing located in the valve chamber of the casing. A valve seat formed at the outflow port, and a floater provided in the valve chamber of the casing, having a specific gravity smaller than the specific gravity of the oil liquid supplied to the oil storage tank, and separating from the valve seat,
A valve element that connects and shuts off the outlet by sitting
It is provided in the valve chamber, and while air flows through the valve chamber,
The oil type discriminating device according to claim 1 or 2, comprising a valve guide for holding the valve element in a state of being separated from the valve seat.