JP3798851B2 - Oil storage and transfer equipment with anti-mixture lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a mixed oil prevention lock that can be operated without generating mixed oil from a storage tank of an oil tank station to an underground tank of a gas station when transported from an oil tank station to a gas station by a tank truck for each oil type. The oil storage / transfer facility
[0002]
[Prior art]
When gasoline, light oil, kerosene, etc. are delivered to a gas station by a tank truck, the hose is connected to a valve on the tank lorry side at the gas station, and the coupling provided at the tip of this hose is connected to the filler fitting on the underground tank side. Work is done.
[0003]
This work is mainly left to the tanker truck driver to perform valve operation to identify the oil from the multiple tanker truck hatches, and to couple to the tank fittings of the underground tanks that match these hatch oils. In order to connect without error, the driver and the staff at the gas station work while checking.
[0004]
In such unloading work, various oil mixing prevention devices and special locks have been used in the past in order to prevent oil mixture in underground tanks. There is one described in Japanese Patent Publication No. 1-50678.
[0005]
The locking device described in this publication and other locks for preventing mixed oil are used for each of the valves provided in each of the plurality of hatches of the tank truck and the filler fittings corresponding to the oil types stored in the hatches. The basic idea is to have one key.
[0006]
[Problems to be solved by the invention]
The lock for preventing mixed oil as in the conventional example is considered only in terms of the connection between the tank truck and the fuel filler fitting. In other words, the oil filling station is a customer as viewed from the cargo handling service side of the tank truck, and it is sufficient that no mixed oil is generated when unloading at the filling station. Therefore, it is only necessary to prevent the mixed oil during unloading.
[0007]
On the other hand, it is necessary for the cargo handling service side to prevent oil blending from the storage tank of the oil tank station to the hatch of the tank truck, which is one of the important management items. Become one.
[0008]
However, there is no established system for consistently preventing mixed oil from unloading from an oil tank to an underground tank at a filling station. The emphasis is placed. Therefore, for tanker truck drivers, confirmation of the prevention of mixed oil at the time of receiving cargo at the storage place is a heavy burden, and even if the key is used to prevent mixed oil, the key used at the filling station In the case of receiving goods at the oil tank station using another thing, there is a sufficient risk of accidentally generating mixed oil.
[0009]
Thus, in the past, handling was performed as if the oil tank station side and the gas station side were separated in the process from receiving the tank lorry vehicle at the oil tank station to unloading at the gas station. The impact on reliable prevention cannot be ignored.
[0010]
The problem to be solved by the present invention is to more reliably prevent the occurrence of mixed oil in the process from receiving at an oil tank station to unloading at an oil station.
[0011]
[Means for Solving the Problems]
The present invention relates to an on-off valve opening / closing operation means provided in an oil supply pipe for supplying oil from a storage tank of an oil tank station to a tank truck, and unloading for unloading oil to an underground tank of the gas station connected to a hatch of the tank truck. A common oil type flow path system for each of the opening / closing operation means of the open / close valve provided in the drain pipe and the opening / closing mechanism of the filler fitting that is connected to the unloading pipe provided in the oil supply path to the underground tank. Each having a common lock that restrains the member in the direction of closing the flow path, and having only one key for unlocking all these locks, the lock being external to the main body of the lock The lock rod is operably incorporated, and locks and locks by causing the tip to interfere, elastic means for urging the lock rod in the unlocking direction, and the direction against the notch provided on the outer peripheral surface of the lock rod Elastic A stopper that restrains the lock rod in the locked position, and an insertion port for inserting the key that pushes the stopper away from the outer peripheral surface of the lock rod. A rotation key is provided between the notch provided on the outer peripheral surface and the rotation key is engaged with the notch provided on the outer peripheral surface of the lock rod so that rotation around the axis of the lock rod is eliminated. It is characterized by.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The oil supply pipe from the storage tank of the oil tank station and the unloading pipe of the tank truck are determined for each oil type, and the same applies to the oil filler fittings provided at the channel inlet to the underground tank of the oil station. The pipe is provided with an on-off valve that manually opens and closes the flow path, and the lubrication port fitting can be configured to open and close the flow path by, for example, a metal fitting body and a cap placed thereon. Therefore, if a lock that locks the members constituting these flow path opening and closing portions is provided, and the lock is changed for each oil type and only one key for unlocking is provided, it is specified in a certain way. By using a common key for the oil type, it is possible to prevent mixed oil in the process from the oil tank station to the filling station.
[0013]
For example, a valve that opens and closes a flow path by a cock, a rotating handle, or the like is incorporated as a flow path opening / closing device in an oil supply pipe in an oil tank. If the cock valve is equipped with a lever, the end of the lock rod is inserted into the peripheral surface of the base end of the lever and the valve is swiveled to restrict the rotation of the cock so that the valve is closed. If the key is inserted into the insertion port and the lock rod is set to the unlocked position, the cock can be rotated to open the channel.
[0014]
In addition, with regard to the oil filler fitting, in order to lock the cap, for example, a lock main body is connected to the metal fitting body side, and a lock rod that can be operated to protrude from the main body is made to interfere with the cap. Locking is possible.
[0015]
Furthermore, the number, shape, and arrangement pattern of each insertion port of the oil filler fitting will be different for each oil type, and the key will be prepared to match these patterns, so that there will be no mistakes in the oil type. Equipment is provided.
[0016]
【Example】
FIG. 1 is a longitudinal sectional view showing a main part of one embodiment of an oil mixture prevention lock used in the oil storage / transfer facility of the present invention, and FIG. 2 is a longitudinal sectional view taken along line AA in FIG.
[0017]
The oil mixture prevention lock is attached to the oil filler fitting of the gas station as will be described later, and is also attached to the manually operated valve provided on each tank truck hatch, which is suitable for such installation conditions. An outer shell is formed by a main body 1 having a different shape and size and a cover 2 that is detachable on the side surface.
[0018]
A lock chamber 1a is formed in a hollow shape by recessing the cover 2 at a portion that is biased toward one side of the main body 1 and covered with the cover 2, and a hole 1b that penetrates the main body 1 is formed at the upper end of the lock chamber 1a. Is open. The hole 1b is a spring chamber 1c having a larger inner diameter at a portion removed from the lock chamber 1a, and the lock rod 3 is incorporated in the hole 1b so as to be movable in the axial direction.
[0019]
The lock rod 3 has such a length that both ends protrude to the outside of the main body 1, an operation knob 3a is formed at one end thereof, and a flange 3b is provided in the spring chamber 1c. A compression coil spring 4 is assembled between the flange 3b and the inner peripheral wall at the left end of the spring chamber 1c, thereby urging the lock rod 3 to the right in FIG.
[0020]
Further, a notch 3c in which the outer peripheral surface is cut flat is provided at a portion where the lock rod 3 faces into the lock chamber 1a. The notch 3c is always held so as to face the lock chamber 1a. For such holding, the lock rod is engaged with the inner peripheral wall of the hole 1b by a key, for example. The rotation around the axis 3 is eliminated.
[0021]
A stopper 5 is incorporated in the upper end side of the lock chamber 1 a and included in the notch 3 c of the lock rod 3. This stopper 5 is provided with a cylindrical guide 5a on the lower surface of a flat block, and as shown in FIG. 2, the upper surfaces of flanges 1d and 2a formed on the inner periphery of the lock chamber 1a and the back surface of the cover 2, respectively. And the inner wall on the upper end side of the lock chamber 1a. And the stopper 5 is urged | biased to the lock rod 3 side by extrapolating the compression coil spring 6 arrange | positioned at the bottom face side of the lock chamber 1a around the guide 5a.
[0022]
Further, two grooves 1e and 1f for inserting a key plate, which will be described later, are formed on the upper portion of the lock chamber 1a and covered with the cover 2, and a portion surrounded by the grooves 1e and 1f and the cover 2 is formed. Are the insertion ports 7a and 7b.
[0023]
In such a mixed oil prevention lock, as shown in FIG. 1, when the stopper 5 is urged upward by the coil spring 6 and enters the notch 3c, the lock rod 3 is moved in the axial direction by the stopper 5. The movement is restricted and kept in the state shown in the figure. If the left end of the lock rod 3 is in the position shown in the figure and the valve of the fuel filler fitting or tank truck is closed and locked in a closed state, the lock is maintained unless the lock rod 3 is moved to the right. Is done.
[0024]
On the other hand, if the stopper 5 is moved downward to release the engagement with the notch 3c, the lock rod 3 is moved to the right side by the coil spring 4, thereby releasing the lock on the fuel filler fitting and the valve. Then, a key 8 as shown in FIG. 3 is prepared for releasing the lock.
[0025]
As shown in the figure, the key 8 includes a display plate 8a for specifying the type of oil, such as “kerosene”, and two pins 8b and 8c protruding from the lower end thereof. These pins 8b and 8c all have the same width, thickness, and length, and are exactly aligned with the insertion ports 7a and 7b of the oil-mixing prevention lock shown in FIGS. When the key 8 is completely inserted, the lower ends of the pins 8b and 8c can push the stopper 5 down to the position of the one-dot chain line in FIG. 3 is released.
[0026]
FIG. 4 is a front view of the main part showing an example in which the arrangement relationship between the pins 8b and 8c of the key 8 is changed. FIG. 4A shows the longest distance between the pins 8b and 8c. The distance between these pins 8b and 8c is reduced in the order of b) and (c). Such a pin 8b, 8c having a different interval is used as a dedicated key 8 for high-octane gasoline, regular gasoline, and light oil, for example.
[0027]
1 and 2 correspond to the kerosene key 8 in FIG. 3, and the interval between the insertion ports 7a and 7b is aligned with the positions of the pins 8b and 8c of the key 8. It is a thing. And each lock | rock is corresponded by providing the lock | rock with the insertion ports 7a and 7b which match with the space | interval of pin 8b of each key 8 of FIG. 4 (a)-(c), and 8c. Can be used as an exclusive lock for oil types.
[0028]
FIG. 5 is a schematic perspective view showing an example in which a lock is installed on an oil supply pipe in an oil tank station, and FIG. 6 is a longitudinal sectional view of an essential part thereof.
[0029]
The oil supply pipe 21 is connected to a tank (not shown) in which kerosene is stored. A tank lorry vehicle hose is connected to the end of the oil supply pipe 21 to supply kerosene to the kerosene hatch of the tank lorry vehicle. To do. A lock valve body 1 shown in FIGS. 1 and 2 is fixed in the vicinity of a cock 22 for incorporating, for example, a butterfly valve type valve in the oil supply pipe 21 to open and close the valve. The cock 22 has a disk-like base 22a connected to the valve side and is provided with a lever 22b protruding in the radial direction and a lock hole 22c provided on the outer periphery of the base 22a in a direction perpendicular to the lever 22b. It is. The lock hole 22c has an inner diameter into which the lock rod 3 of the lock shown in FIGS. 1 and 2 is fitted. As shown in FIG. 6, the lever 22b is orthogonal to the oil supply pipe 21 and the valve is closed. Sometimes the lock rod 3 of the lock is fitted.
[0030]
In the facility of the oil supply pipe 21 provided with such a lock, the lock rod 3 is inserted into the lock hole 22c in the state shown in FIG. Remains closed. Then, when the pins 8b and 8c are inserted into the insertion ports 7a and 7b using the key 8 dedicated to kerosene, the stopper 5 is pushed downward in FIGS. 1 and 2 by these pins 8b and 8c as described above. As a result, the engagement with the lock rod 3 is released, whereby the lock rod 3 comes out of the lock hole 22c. Accordingly, the cock 22 can operate to turn the lever 22b, and kerosene can be supplied from the oil supply pipe 21 to the tank truck.
[0031]
FIG. 7 is a cutaway view of the main part showing an example in which a lock is provided on a bottom valve valve 23 provided in a hatch of a tank truck.
[0032]
The bottom valve valve 23 is connected to each hatch of a tank truck, and in the example shown in the figure, is used to open a flow path of an unloading pipe having a base end connected to the bottom surface thereof. It is something that is normally installed. In the illustrated example, an operation handle 24 for opening and closing the bottom valve valve 23 for kerosene is provided, and the lock body 1 is fixed to the outer surface of the hatch near the operation handle 24.
[0033]
The operation handle 24 is a rotary operation type, and is lowered to the lowest position in the state of FIG. 7, and the internal valve is closed. Then, the lock is arranged such that the tip of the lock rod 3 is positioned so as to slightly cover the operation handle 24, and the valve is raised by an amount corresponding to the gap between the operation handle 24 and the lock rod 3 in the figure. Even so, the flow path is set so as not to open.
[0034]
Depending on the positional relationship between the lock main body 1 and the operation handle 24, even if the operation handle 24 is rotated and raised, the lock rod 3 buffers the operation handle 24 and prevents its movement. Therefore, if the lock is set in the state shown in FIG. 1, the bottom valve valve 23 cannot be opened by the operation handle 24 unless the key 8 is used, and the mixed oil when the key other than the kerosene key 8 is used. It is surely prevented.
[0035]
As described above, the lock of the cock 22 of the oil supply pipe 21 can be unlocked by the common key 8 in the oil tank station, and the unlocking operation of the operation handle 24 of the bottom valve valve 23 can be performed even in a tank truck. And when unloading at the filling station, the hose connected to the unloading pipe is connected to the filling port fitting of the underground tank. Therefore, if the filling piece is provided with a lock that can be unlocked by the key 8, the oil tank In a series of operations from the place to the unloading to the underground tank, a common oil key 8 is used to prevent mixed oil. Hereinafter, an example in which the main body 1 of the lock that can be unlocked by the key 8 is provided in the fuel filler fitting is shown in FIG.
[0036]
8 is a cutaway front view showing an oil filler fitting provided with the main body 1 of the oil mixture prevention lock described in FIGS. 1 and 2, FIG. 9 is a plan view, and FIG. 10 is a view taken along the line BB in FIG. is there.
[0037]
The oil filler metal fitting is provided with a metal fitting body 11 connected to the upper end of the pipe to the underground tank and a cap 12 which is detachably covered on the upper end. A lock body 1 is provided on the upper surface of the cap 12. In the lock main body 1 in this example, the structure for incorporating the lock rod 3 and the like is the same as that shown in FIG. 1, but the engagement rod 1g protrudes from the lower end of the main body 1 as shown in FIG. The only difference is that an engagement pin 1h is provided at the lower end of the mating rod 1g.
[0038]
On the other hand, a lock rib 12a is raised on the upper surface of the cap 12, and a lock hole 12b into which the lock rod 3 is fitted is provided in the rib 12a. Further, the cap 12 is provided with a through hole 12c into which the engaging rod 1g is inserted, and a guide groove 12d for guiding the engaging pin 1h is formed in the vertical direction outside the through hole 12c. The cap 12 is configured to be firmly fixed to the metal fitting body 11 by being put on the upper surface of the metal fitting body 11 and rotated similarly to the one described in Japanese Utility Model Publication No. 59-23743, for example. As shown, a stopper 11 a against which the engaging rod 1 g of the lock body 1 attached to the cap 12 abuts is formed on the outer peripheral surface of the metal fitting body 11.
[0039]
When the cap 12 is removed from the metal fitting body 11, the positional relationship is such that the engaging rod 1g is directly below the guide groove 12d as shown in FIG. 12, and the key pins are inserted into the insertion ports 7a and 7b as in the previous example. By inserting, the lock rod 3 is moved to the right side in FIG. 10 and removed from the lock hole 12b. Thereby, since the engagement rod 1g of the lock body 1 is inserted into the through hole 12c, the lock body 1 is pulled up by the engagement rod 1g and the through hole 12c as shown in FIG. Can do. If the pulling height at this time is such that the lower end of the engagement rod 1g does not hit the stopper 11a of the metal fitting body 11, the cap 12 can be rotated with respect to the metal fitting body 11, and thereby the cap 12 can be removed.
[0040]
In the fuel filler fitting provided with such a lock main body 1, for example, if the one shown in FIGS. 8 to 12 is for kerosene, the pins 8a and 8b of the key 8 in FIG. The lock rod 3 can be moved in the unlocking direction by being inserted into the insertion ports 7a and 7b, respectively, and can be removed from the metal fitting body 11 by turning the cap 12 as described above.
[0041]
In this way, by using the dedicated key 8 for the kerosene filler fitting, the cap 12 can be removed from the fitting body 11 to unload the kerosene. Unless the kerosene key 8 is used, the filler port The metal fitting cannot be opened, and oil mixing when using a key other than kerosene key 8 is reliably prevented. Therefore, a series of operations from filling of the kerosene from the oil supply pipe 21 to the tank lorry at the oil tank station, unloading from the unloading pipe 23 of the tank lorry car, and removal of the cap 12 of the fuel filler fitting is a single key. This is not possible unless 8 is used, and it is possible to reliably prevent mixed oil in the underground tank.
[0042]
FIG. 13 to FIG. 16 show another example of the structure of attaching the lock body to the oil filler fitting, which is locked to the ribs 11d and 12d protruding from the outer peripheral surfaces of the fitting body 1 and the cap 2, respectively. The cap 12 is locked by hanging the 13 main bodies 13a.
[0043]
As shown in FIG. 15, the lock main body 13a has a bracket 13b protruding from one end side of the main body 13a, and a lock rod 13c arranged so as to be biased toward the upper end side is incorporated into the bracket 13b so as to be able to advance and retreat. Then, as shown in FIG. 14, the main body 13a is opened with two insertion holes 13d and 13e aligned with the respective pins of the respective oil type keys, and by a mechanism similar to the structure shown in FIGS. The lock rod 13c can be set to the lock position and the release position.
[0044]
Further, a pivot shaft 13f projects between the lower end side of the main body 13a and the bracket 13b, and the pivot shaft 13f is rotatably inserted into a connecting hole 11e formed in the rib 11d of the metal fitting body 11 as shown in FIG. Then, when the main body 13a is positioned between the metal fitting main body 1 and the cap 2 so as to be in the posture of FIGS. 13 and 14, the rib 12d of the cap 12 is sandwiched between the main body 13a and the bracket 13b. If the lock rod 13c is inserted into the lock hole 12e opened in 12d, the cap 12 is restrained and locked by the metal fitting body 11.
[0045]
Similarly to the previous example, in the example of FIG. 13, if the filler fitting is for kerosene, the lock rod is obtained by inserting the pins 8a and 8b of the key 8 shown in FIG. 3 into the insertion ports 13d and 13e. 13c can be moved to the right in FIG. Therefore, the lock rod 13c comes out of the lock hole 12e of the rib 2d and has no relation to the rib 12d, and the main body 13a can be turned around the pivot 13f as shown in FIG. Thereby, the cap 12 is released from the restriction between the metal fitting body 11 and the cap 12 can be removed.
[0046]
【The invention's effect】
In the present invention, the oil type can be handled without error by using only one key prepared for each oil type in the process from receiving the oil tank station to unloading at the gas station. In addition to preventing mixed oil when unloading tanks, it is possible to reliably prevent mixed oil when refueling a tank truck at an oil tank station. Therefore, it is possible to prevent mixed oil without requiring labor of workers or complicated facilities for both the cargo handling service side and the gas station side, which handle oil handling by tank trucks.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a main part of a mixed oil prevention lock used in an oil storage / transfer facility of the present invention.
FIG. 2 is a longitudinal sectional view taken along line AA in FIG.
FIG. 3 is a front view showing a key dedicated to kerosene.
FIG. 4 is a front view of a main part showing the arrangement of pins in a key dedicated to three types of oil other than kerosene.
FIG. 5 is a schematic view showing an example in which a lock is arranged on a valve portion of a kerosene oil supply pipe in an oil tank station.
6 is a schematic longitudinal sectional view of a main part showing a lock between a lock rod and a cock of the lock shown in FIG. 5;
FIG. 7 is a cutaway view of a main part showing an example in which a lock is arranged on a bottom valve valve of a tank truck.
FIG. 8 is a cutaway front view of an oil filler fitting provided with an oil mixture prevention lock.
9 is a plan view of FIG. 8. FIG.
10 is a front view of the main part as viewed in the direction of arrows BB in FIG. 8;
11 is a detail of the lock in the example of FIG. 8, wherein (a) of FIG. 8 is a front view thereof, and (b) of FIG. 8 is a vertical sectional view on the right side of the main part of FIG. .
FIG. 12 is a cutaway view of the main part showing a state in which the main body of the lock is moved upward and the cap can be removed from the metal fitting main body.
FIG. 13 is a cutaway front view showing an example provided with a lock that locks between the metal fitting body and the ribs of the cap.
FIG. 14 is a plan view of FIG. 13;
15 is a cutaway view of the lock in the example of FIGS. 13 and 14. FIG.
FIG. 16 is a cutaway view of the main part when the lock is released and the main body is rotated.
[Explanation of symbols]
1: Body 1a: Lock chamber 1b: Hole 1c: Spring chamber 1d: Flange 1g: Engagement rod 1h: Engagement pin 2: Cover 3: Lock rod 3a: Knob 3c: Notch 4: Coil spring 5: Stopper 6: Coil Spring 7a, 7b: Insertion slot 8: Key 8a: Display plate 8b, 8c: Pin 11: Metal body 11a: Stopper 12: Cap 12a: Rib 12b: Lock hole 12c: Through hole 12d: Guide groove 13: Lock body 21 : Lubrication piping 22: Cock 22a: Base 22b: Lever 22c: Lock hole 23: Bottom valve valve 24: Operation handle

Claims (1)

On-off valve opening / closing operation means provided in the oil supply pipe for supplying oil from the storage tank of the oil tank to the tank truck, and provided in the unloading pipe for unloading oil to the underground tank of the gas station connected to the hatch of the tank truck For each of the common oil type flow path systems, the open / close valve operating means and the open / close mechanism of the filler fitting that connects the unloading piping provided in the oil supply path to the underground tank are connected. An oil storage / transfer facility comprising a common oil-locking lock comprising a common lock that restrains the member in a closing direction and having only one key for unlocking all these locks ,
A lock rod in which the lock is operably incorporated from the outside of the lock body, locks and restrains the front end of the lock, elastic means for urging the lock rod in the unlocking direction, and an outer periphery of the lock rod A stopper that is elastically biased in a direction to abut against a notch provided on the surface and restrains the lock rod in the locking position, and an insertion port for inserting the key that pushes the stopper in a direction away from the outer peripheral surface of the lock rod, A locking key is provided between the inner peripheral wall of the hole into which the lock rod is incorporated and the notch provided on the outer peripheral surface of the lock rod, and the locking key is engaged by engaging the notch provided on the outer peripheral surface of the lock rod. Oil storage and transfer equipment with oil blend prevention lock that prevents rotation around the axis of the rod .

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