JPH0366240B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tank truck that stores different types of liquids in a plurality of tank chambers, and is capable of preventing liquids of different types from being loaded or unloaded by mistake. This relates to a prevention device.

Generally, when a tank truck transports different types of liquids such as diesel oil, kerosene, high octane gasoline, regular gasoline, etc. in multiple tank compartments, loading or unloading the wrong type of liquid is common. In other words, oils may be mixed, resulting in large losses such as re-refining or disposal due to mixing of liquids. In addition, in the event that diesel oil is placed in a tank where gasoline vapor is present,
If kerosene, etc. were injected, there was a risk of explosion due to static electricity discharge.

Conventionally, in order to prevent the wrong type of liquid from being unloaded by mistake, when loading liquids, the type of liquid in each chamber was indicated, and the type of liquid in that chamber was confirmed when unloading. However, when loading the wrong type of liquid by mistake, or unloading the tank into the wrong tank, a tank containing a different type of liquid was used. It was not possible to prevent mistakes such as unloading the cargo at the wrong time, and this was insufficient as a measure to prevent oil mixture.

The present invention provides a tank truck by providing a plate-shaped command plate with slits in different specific positions for each type of liquid, and a plate-shaped key piece with slits in the same position as the command plate for each of the same liquid types. Insert the pre-prepared key piece for each storage tank for loading or unloading on the ground by overlapping the pre-inserted command piece into the verification case provided for each tank room.
A photoelectric device is provided from one side to the other side to receive the light beam passing through the slit of the command piece and the slit of the key piece, and converts it into electricity, and an alarm means for notifying that the liquids match according to a command of the photoelectric device, or , is equipped with a safety device that allows the passage of liquid for loading or unloading to be opened, and is loaded with a liquid that matches the liquid type on the command piece inserted into the verification case in advance. By unloading the oil into a storage tank, it is possible to reliably prevent oil from mixing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An oil mixture prevention device according to an embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 10, 1 is a tank truck with a tank 5 mounted on a chassis 3, and the tank 5 has a plurality of tank chambers 9,
The tank chamber 9 is divided into 9, 9, and an inlet 11 for loading liquid is provided at the upper part of each tank chamber 9 so as to be openable and closable. Also, a bottom valve 13 is provided at the bottom of each tank chamber 9.
A discharge valve 17 is provided via a pipe 15, and the bottom valve 13 is opened and closed by a bottom valve handle 19 provided in the tank chamber 9 via a connecting rod 21. Reference numeral 23 designates loading equipment provided for each type of liquid, in which purified liquid is stored in a storage tank 25 on the ground, through a pump 27, a pressure regulating valve 29, a flow meter 31, and an injection nozzle 33 into the tank truck 1. It is injected from the injection port 11.
35 is a workbench, and 37 is a climbing ladder. 39 is unloading equipment installed for each type of liquid to receive liquid from the tank truck 1. An injection pipe 43 is provided that leads to a storage tank 41 buried underground, and when unloading, a hose is connected to the discharge valve 17 of the tank truck 1. 45. 47 is a ventilation pipe communicating with the atmosphere.

The bottom valve 13 is constructed as follows. That is, 77 is a valve body that opens and closes a passage 79 communicating with the pipe 15, and is fixed to the lower end of a valve rod 83 that is screwed into a support frame 81 so as to be able to move up and down. and is connected to the bottom valve handle 19. The bottom valve handle 19 is constructed as follows. In other words, 89 is the tank chamber 9
The bottom valve handle 19 is fixed to the upper end of the handle shaft, and the bottom valve handle 19 is fixed to the upper end, and the lower end is connected to the universal joint 87. 9
Reference numerals 3 and 93 designate locking valves that are fixed to each other by screws 94 while sandwiching the handle shaft 89;
Locking pin 9 that appears and retracts by the electromagnetic coil SOL
6 and is removably locked. 97 is safety device 95
This is a bracket that supports the shaft cylinder 91 and is fixed to the shaft cylinder 91 by screws 99, 99.

Reference numeral 101 denotes a verification device, which includes a light emitting unit 1 that emits an optical signal.
03, and a control section 105 that electrically converts and controls the optical signal emitted from the light emitting section 103. The light emitting section 103 is configured as follows. That is, the instruction piece 109 and the key piece 11 are attached to the verification case 107 provided at the upper part of the tank 5 and the lower part of the tank 5.
1 are provided so that they can be freely inserted one on top of the other. Command piece 1
09 is provided for each type of liquid, and is prepared in advance at the office of the transportation company that owns the tank truck 1, and is given to the driver along with a written instruction for the type of liquid to be loaded into each tank room 9. By inserting it into the verification case 107 of the tank chamber 9, the type of liquid to be loaded into the tank chamber 9 is specified. In addition, the key piece 111 is provided in advance in a storage box 113 provided for each storage tank 25 and 41 for each liquid type in the loading equipment 23 and the unloading equipment 39, and is taken out at the time of loading and unloading to issue a command to the collation case 107. By inserting the key piece 109 overlappingly with the key piece 109, it is checked whether the liquid type of the command piece 109 and the liquid type of the key piece 111 match. Command piece 10
9 and the key piece 111 are provided with slits SL1 and SL1', SL2 and SL2', and SL3 and SL3', respectively, corresponding to the liquid types, for example, diesel oil, kerosene, and gasoline.
are arranged vertically, and the command piece 109 is provided with a slit SL4 below it, and the key piece 111 is further provided with a slit SL5 below it.
The control section 105 is provided at a location where there is no risk of ignition, such as at the bottom of the tank or inside the driver's cab, and is configured as follows. That is, lamps L1, L2,
The light emitted by L3, L4, and L5 is sent to the light emitting unit 103 through the optical fiber barcode 115, and the command piece 10 inserted into the case 107 in an overlapping manner
9 and the aforementioned slit of the key piece 111, this light is received by the photoelectric devices PH1, PH2, . . . PH5 via the optical fiber bar code 116 and converted into electricity. r4, r5, ... r8 are the contacts of the respective relays R4, R5, ... R8,
PL2 and PL3 are a safety lamp and a warning lamp, respectively, BU is a warning buzzer, B is a power source, and MS is a main switch, which are connected to each tank chamber 9 as shown in FIG. 11.

Further, the injection port 11 is configured as follows. That is, the injection port 11 is fixed to a manhole cover 119 that covers a manhole 117 opening into the tank chamber 9, and is covered by an injection port cover 121. Reference numeral 123 designates a handle for pressing and tightening the inlet cover 121, which is screwed onto an arm 129 that is pivotably pivoted up and down by a shaft 127 to a bracket 125 fixed to the manhole cover 119, and the inlet cover is attached to the lower end. 121 is supported so as to be swingable in a free direction. Reference numeral 131 denotes a hook pivotally attached to the manhole cover 119, and its upper end removably engages with a pin 133 fixed to the other end of the arm 129.

135 is a petal that is fixed to the hook 131, and by stepping on it, the hook 13 resists the bullet 137.
1 from the pin 133. 1
39 is a safety device equipped with an electromagnetic coil SOL, which is fixed to the manhole cover 119 and restricts the opening movement of the hook 131 by a locking pin 141 that protrudes and retracts.

In the above embodiment, the command piece 10 corresponds to the type of liquid (for example, light oil) scheduled for each tank chamber 9.
9 into the case 107 of the corresponding tank chamber 9. Next, the key piece 111 provided in the storage box 113 of the loading equipment 23 is inserted into the verification case 107 so as to overlap the command piece 109. When the command piece 109 is not inserted, the lights of lamps L4 and L5 both pass through, and relays R7 and R8 are activated to close contacts r7 and r.
8 is cut off and the current is cut off. Furthermore, when either the command piece 109 or the key piece 111 is inserted, the light from either the lamp L4 or the lamp L5 passes through, so either the relay R7 or the relay R8 is activated, and therefore the contact r7 However, since one of the contacts r8 is cut off, the current is in a cut off state. When both the command piece 109 and the key piece 111 are inserted into the verification case 107, the relay R7,
Both R8 operate, contacts r7 and r8 are connected, and current flows. When the liquid type of the command piece 109 and the key piece 111 match, for example, when it is light oil, the lamp L
4 and L5 are cut off, relays R7 and R8 are not energized, and contacts r7 and r8 are connected. Further, light passes through the slits SL1 and SL1', relay R4 is connected, and the electromagnetic coil SOL of the safety device 139 is activated, the inlet cover 121 can be opened, loading becomes possible, and the safety lamp PL2 is lit. key piece 1
11, when the liquid type of the command piece 109 does not match,
Contact r4 of the alarm circuit is connected, and the alarm buzzer BU alarm lamp PL3 is activated.

After the loading operation is completed, the key piece 111 is returned to the original storage box 113 of the loading equipment 23.

When unloading, the key piece 111 provided in the storage box 113 provided for each storage tank 41 of the unloading equipment 39 is inserted into the collation case 107. If the liquid types match, the safety device 95 of the bottom valve 13
is activated, the bottom valve 13 can be opened, and the cargo can be unloaded. Further, when the liquid types do not match, the alarm buzzer BU and alarm lamp PL3 are activated. After unloading, the key piece 111 is placed in the storage box 113 of the unloading equipment 39.
Return to In this way, it is possible to prevent loading or unloading even if the wrong type of liquid is used. Even if these light emitting parts 103 are provided on the upper part of the tank 5 where there is a risk of ignition, there is no risk of ignition or explosion because the verification means and the signals to be emitted all use light.

According to the present invention, when loading or unloading liquid, it is possible to prevent mistakes in the type of liquid, eliminate losses due to re-refining or disposal of mixed oil, and prevent the risk of explosion. .

[Brief explanation of drawings]

FIG. 1 is a side view of a tank truck equipped with a device according to the present invention, FIG. 2 is a side view of the same in another situation, and FIGS. 3 and 4 are side sectional views of main parts, respectively.
An enlarged plan sectional view, FIG. 5 is a side sectional view of other important parts, FIGS. 6 and 7 are side sectional views and top views of other important parts, and FIGS. 8 and 9 are respectively command pieces. , FIG. 10 is a front view of the key piece, FIG. 10 is a side sectional view of the instruction piece and the key piece, and FIG. 11 is an explanatory diagram of the electric circuit. Explanation of the symbols representing the main parts of the drawing, 1...tank truck, 9...tank room, 25, 41...storage tank, 107...verification case, 109...command piece,
111...Key piece, 85, 139...Safety device, SL1,
SL2, SL3...Slit, SL1', SL2', SL
3'...Slit, PH1, PH2, PH3...Photoelectric device.

Claims (1)

[Claims] 1 In a tank truck 1 that stores different types of liquids in a plurality of tank chambers 9, a plate-shaped command piece 109 is provided with slits SL1...SL3 at specific positions that differ for each type of liquid, and A verification case 1 is provided for each tank chamber 9 of the tank truck 1, and includes a command piece 109 and a plate-shaped key piece 111 with slits SL1'...SL3' provided at the same position.
07, the key piece 111 provided in advance for each storage tank 25, 41 for loading or unloading on the ground is overlapped with the command piece 109 inserted in advance.
SL1...SL of the command piece 109 from one side of the verification case 107 to the other side.
3 and the slits SL1'...SL3' of the key piece 111, and converts the received light into electricity.
PH1...PH3 are provided, and the photoelectric device PH1...PH
Alarm means for notifying the coincidence of liquids according to the command of 3;
Alternatively, an oil mixture prevention device for a tank truck is provided with a safety device 85, 139 that can open a passage for liquid for loading or unloading.