JP3849293B2 - Tank lorry bottom valve locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank lorry bottom valve locking device for preventing the opening of a bottom valve other than a hatch to be unloaded with a tank lorry for delivering fuel oil to a gas station.
[0002]
[Prior art]
A tank lorry bottom valve locking device for preventing the opening of a bottom valve other than the hatch to be unloaded has been proposed by the present applicant as Japanese Patent Laid-Open No. 10-16633. Although this is effective, since the bottom valve locking device is a ring surrounding the handle, it is possible to open the bottom valve even in a locked state, and there is a risk of illegal unloading. In addition, since the bottom valve can be locked even when the bottom valve is open, there is a problem that if the bottom valve is locked while the bottom valve is opened and the bottom valve of another hatch is opened, the oil flows backward and mixed.
[0003]
[Problems to be solved by the invention]
Therefore, the object of the present invention is to eliminate the disadvantages of the conventional example described above, and in the locked state, the bottom valve cannot be opened, and unauthorized unloading can be prevented. It is to provide a tank lorry bottom valve locking device in which oil does not flow backward.
[0004]
[Means for Solving the Problems]
To achieve the above object, the present invention firstly divides a tank placed on a lorry into a plurality of hatches, connects each hatch to a discharge pipe via a bottom valve, and In the tank lorry bottom valve locking device, which is led out on the ceiling plate of the hatch, a handle is attached to the upper end of the valve stem, and the handle is turned to open the bottom valve by turning the handle.
The bottom valve locking device is composed of a device main body attached in the vicinity of the handle, and a lock plate connected to the vicinity of the handle by a chain, and the lock plate has a key portion inserted into an insertion groove of the device main body, pressing portion which the handle is close to the upper end of the handle at the state of being lowered are provided when closed, the insertion groove of the lock plate to the housing of the apparatus main body is formed, inserted in the insertion groove in the housing A lock pin for locking the key portion to be operated, and a solenoid for operating the lock pin, the bottom valve locking device is connected to the unloading control device by a signal line, and a coupling is connected to the tip of the discharge pipe via a main valve. On the other hand, a coupling is provided at the tip of the lubrication pipe of the underground tank of the gas station, and an oil seed hose is connected to one end of the lubrication hose that connects the coupling of the lorry and the coupling of the lubrication pipe. A connector connected to the oil type sensor by a signal line is provided at the other end, and an outlet to which the connector is connected is provided to the lorry, and the outlet is connected to the unloading control device by a signal line, The unloading control device stores the loading data of each hatch when loaded at the oil tank station, receives the oil type signal from the oil type sensor, displays the hatch number containing the oil type on the display, and from the keyboard. The gist is to receive the hatch selection signal and the unloading signal and to output the unlock signal to the bottom valve locking device of the selected hatch .
[0005]
Second, the handle is provided with a pin that comes into contact with the lock plate when the handle is slightly rotated in the locked state .
[0006]
According to the present invention, the bottom valve cannot be opened in the locked state, so that unauthorized unloading can be prevented. If the bottom valve is not closed, the bottom valve cannot be locked and oil from other hatches does not flow backward.
[0007]
Since the handle is provided with a pin that comes into contact with the lock plate, in the locked state, the holding portion and the pin are in contact and the handle cannot be rotated, and there is a backlash between the holding plate and the handle. The bottom valve locking device can be easily locked.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. As shown in FIG. 1, a tank 3 partitioned into a plurality of hatches 2 (A, B, C) is mounted on a lorry 1, and each hatch 2 is connected to a discharge pipe 5 via a bottom valve 4. . The valve rod 6 of each bottom valve 4 is led out on the ceiling plate of the hatch 2, a handle 7 is attached to the upper end of the valve rod 6, and a bottom valve locking device 8 for locking the handle 7 is provided. The lock device 8 is connected to the unloading control device 10 by a signal line 9. A coupling 12 is provided at the tip of the discharge pipe 5 via a main valve 11.
[0009]
On the other hand, a coupling 15 is provided at the tip of the oil supply pipe 14 of the underground tank 13 of the gas station, and an oil type identification piece 16 is connected by a chain 17. An oil type sensor 19 is provided at one end of an oiling hose 18 that connects the coupling 12 of the lorry 1 and the coupling 15 of the oiling pipe 14, and a connector 21 connected to the oil type sensor 19 by a signal line 20 is connected to the other end. Is provided. The lorry 1 is provided with an outlet 22 to which a connector 21 is connected. The outlet 22 is connected to the unloading control apparatus 10 by a signal line 23.
[0010]
The unloading control device 10 stores the loading data of each hatch 2 when loading at the oil tank station, receives the oil type signal from the oil type sensor 19, and displays the hatch number containing the oil type on the display 24. In response to the hatch selection signal and the unloading signal from the keyboard 25, the unlock signal is output to the bottom valve locking device 8 of the selected hatch 2. Further, after unloading, it receives an insertion signal from the bottom valve locking device 8 and outputs a locking signal to the bottom valve locking device 8.
[0011]
As shown in FIGS. 2 and 3, the bottom valve locking device 8 is provided on the handle 7, a device main body 26 attached in the vicinity of the handle 7, a lock plate 28 connected to the handle 7 by a chain 27, and the handle 7. The pin 29 is configured.
[0012]
An insertion groove 31 for the lock plate 28 is formed in the housing 30 of the apparatus body 26, and a solenoid 32 and a switch 33 are provided in the housing 30. The lock pin 34 attracted by the solenoid 32 is projected and urged toward the insertion groove 31 by a spring 35, and the switch 33 is opened and closed by an actuator 37 engaged with a leaf spring 36 protruding in the insertion groove 31. . The lock plate 28 is in contact with a key portion 38 inserted into the insertion groove 31 of the apparatus main body 26 and a pin 29 provided on the handle 7, and the handle 7 is lowered when the bottom valve 4 is closed and the handle 7 is lowered. A pressing portion 39 close to the upper end of 7 is provided. The solenoid 32 and the switch 33 are connected to the unloading control device 10 via the signal line 9.
[0013]
Next, the operation will be described based on the flowchart of FIG. When loading at the oil tank station, the oil type and amount of oil loaded in each hatch 2 are stored in the unloading control device 10, and the bottom valve locking device 8 of each hatch 2 is locked. Then, at the filling station to unload, the worker connects the coupling 12 of the discharge pipe 5 and the coupling 15 of the oiling pipe 14 with the oiling hose 18 and inserts the oil type identification piece 16 into the oil type sensor 19. The connector 21 is connected to the outlet 22. When the oil type signal of the oil type identification piece 16 detected by the oil type sensor 19 is input to the unloading control device 10 via the signal lines 18 and 23 (ST1), the unloading control device 10 contains this oil type. The hatch number is displayed on the display 24 (ST2). When the hatch number button displayed on the display unit 24 is pressed with the keyboard 25 and the hatch number to be unloaded is input (ST3), the oil type matches the number displayed on the display unit 24 (ST4). Next, the unloading button of the keyboard 25 is pressed, and an unloading signal is input (ST5). If all the bottom valve locking devices 8 are locked at this time (ST6), the lock device 8 of the selected hatch 2 is entered. An unlock signal is output (ST7). Upon receiving the unlock signal, the solenoid 32 is excited, the lock pin 34 is attracted, and the lock plate 28 is unlocked.
[0014]
In addition, when the number other than the hatch displayed on the display unit 24 in step ST4, that is, the number of the hatch whose oil type does not match is pressed, and when any bottom valve locking device 8 is not locked in step ST6. Displays an erroneous operation on the display 24 (ST8).
[0015]
In this way, the oil type identification piece 16 of the oil storage tank 13 to be unloaded is input to the oil type sensor 19, and the hatch number containing the oil of the oil type input from the oil type sensor 19 is displayed on the display 24. When the button corresponding to the hatch number is pressed, the bottom valve locking device 8 is unlocked, so that an error in the type of unloading oil can be prevented. Further, since no unlock signal is output unless all the bottom valves 4 are closed, oil does not flow back to other hatches, and mixed oil can be prevented.
[0016]
An operator gets on the tank 3, removes the lock plate 28, rotates the handle 7 and opens the bottom valve 4 of the hatch 2. Then, when getting off the tank 3 and opening the main valve 11, the fuel oil in the hatch 2 flows into the oil storage tank 13 through the discharge pipe 5, the oil supply hose 18, and the oil supply pipe 14.
[0017]
When the unloading is finished, the main valve 11 is closed, the oil type identification piece 16 and the connector 21 are removed, and the oil supply hose 18 is disconnected. Then, it rides on the tank 3 and turns the handle 7 to close the bottom valve 4. When the bottom valve 4 is closed, the handle 7 is lowered and the lock plate 28 can be inserted into the insertion groove 31 of the apparatus main body 26.
[0018]
When the key portion 38 of the lock plate 28 is inserted into the insertion groove 31, the plate spring 36 is pushed by the tip of the key portion 38, the actuator 37 is pushed by the plate spring 36, the switch 33 is closed, and the lock plate 28 is inserted. The signal is transmitted to the unloading control device 10 (ST9), and the locking signal is output from the unloading control device 10 to the lock device 8 (ST10). The solenoid 32 is demagnetized, the lock pin 34 is projected by the spring 35, the lock pin 34 is engaged with the recess 38a of the key portion 38, and the lock plate 28 is locked.
[0019]
Since the lock plate 28 cannot be inserted into the insertion groove 31 of the apparatus body 26 unless the bottom valve 4 is closed and the handle 7 is lowered as described above, the bottom valve locking device 8 is locked with the bottom valve 4 open. There is no. Further, when the handle 7 is slightly turned in the locked state, the pressing portion 39 and the pin 29 come into contact with each other, so that the bottom valve 4 cannot be opened even if there is play between the pressing plate 39 and the handle 7. Thus, since there may be backlash between the pressing plate 39 and the handle 7, the bottom valve locking device can be easily locked.
[0020]
【The invention's effect】
As described above, the present invention divides the tank placed on the lorry into a plurality of hatches, connects each hatch to the discharge pipe via the bottom valve, and connects the bottom valve valve to the hatch ceiling plate. The bottom valve locking device of the tank truck is designed to open the bottom valve by attaching the handle to the upper end of the valve rod and turning the handle to open the bottom valve. And a lock plate connected with a chain in the vicinity of the handle, the housing of the device body has a lock plate insertion groove, and a lock pin for locking the lock plate in the housing; The lock plate is provided with a solenoid, and the lock plate is provided with a key portion inserted into the insertion groove of the apparatus main body and a pressing portion close to the upper end of the handle when the valve is closed. Not be able to open the bottom valve in click state, it prevents unauthorized unloading, also can not be locked unless closed bottom valve, thereby preventing the oil of another hatch backflow.
[Brief description of the drawings]
FIG. 1 is an overall view of a lorry in which a bottom valve locking device of the present invention is implemented.
FIG. 2 is a plan view showing a cross section of a part of the bottom valve locking device of the present invention.
FIG. 3 is a side view showing a part of the bottom valve locking device of the present invention in section.
FIG. 4 is a flowchart of an unloading control device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolly 2 (A, B, C) Hatch 3 Tank 4 Bottom valve 5 Discharge pipe 6 Valve rod 7 Handle 8 Bottom valve locking device 9, 18, 23 Signal line 10 Unloading control device 11 Main valve 12, 15 Coupling 13 Oil storage Tank 14 Lubrication pipe 16 Oil type identification piece 17, 27 chain 18 Lubrication hose 19 Oil type sensor 21 Connector 22 Outlet 24 Display 25 Keyboard 26 Device body 28 Lock plate 29 Pin 30 Housing 31 Insertion groove 32 Solenoid 33 Switch 34 Lock pin 35 Spring 36 Leaf spring 37 Actuator 38 Key part 38a Concave part 39 Holding part

Claims (2)

The tank placed on the lorry is divided into a plurality of hatches, each hatch is connected to the discharge pipe via the bottom valve, and the valve valve of the bottom valve is led out on the ceiling plate of the hatch, In the tank lorry bottom valve locking device that attaches the handle and rotates the handle so that the valve stem rises and opens the bottom valve.
The bottom valve locking device is composed of a device body attached in the vicinity of the handle and a lock plate connected in the vicinity of the handle with a chain,
The lock plate is provided with a key portion that is inserted into the insertion groove of the apparatus main body, and a pressing portion that is close to the upper end of the handle when the handle is lowered when the valve is closed,
A lock plate insertion groove is formed in the housing of the apparatus body, and a lock pin for locking a key portion inserted into the insertion groove and a solenoid for operating the lock pin are provided in the housing.
The bottom valve locking device is connected to the unloading control device by a signal line,
A coupling is provided at the tip of the discharge pipe via a main valve,
On the other hand, a coupling is provided at the tip of the lubrication pipe of the underground tank of the gas station, and an oil type sensor is provided at one end of the lubrication hose connecting the coupling of the lorry and the coupling of the lubrication pipe. A connector connected to the sensor by a signal line is provided at the other end,
In addition, the lorry is provided with an outlet to which the connector is connected, and the outlet is connected to the unloading control device with a signal line,
The unloading control device stores the loading data of each hatch when loaded at the oil tank station, receives the oil type signal from the oil type sensor, displays the hatch number containing the oil type on the display, and from the keyboard. A tank lorry bottom valve locking device that receives a hatch selection signal and an unloading signal and outputs an unlocking signal to the selected hatch bottom valve locking device. 2. The tank lorry bottom valve locking device according to claim 1, wherein the handle is provided with a pin that comes into contact with the lock plate when the handle is slightly rotated in a locked state .

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