JPH1095499A - Tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent simply, easily, automatically, and securely mixed oil accidents or mixed liquid accidents resulting from forgetting to change over an intermediate partition valve or incorrect operation. SOLUTION: An intermediate partition valve 15 between the front side pipe 2 and the rear side pipe 4 is opened/closed by an air cylinder 18. A spring 19 urging the intermediate sluice valve to the closing side, is built in the air cylinder 18 and the valve 15 is changed over to the opening side by supply of compressed air. This tank lorry is provided with an alarm 20 against the opening intermediate sluice valve, an electromagnetic valve 23 arranged in the compressed air pipe 22, a manual switch 25 to connect current to the electromagnetic valve 23 or the alarm 20 and an interlocking switch (j) of a power- drawing device H, and a control means like an automatic control relay making it impossible to lead current in the manual switch 25 when the main switch is in ON-condition and also making it impossible to lead current in the interlocking switch (j) when the main switch is in OFF-condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tank lorry. That is, the present invention relates to a piping structure of a tank truck in which the inside of a tank is partitioned into a plurality of tank chambers.

[0002]

2. Description of the Related Art FIG. 3 is a piping diagram for explaining a conventional tank lorry of this kind. Tank lorries are generally
The inside of the tank is divided into a plurality of tank chambers, and the following piping structure is employed. That is, an appropriate number of tank chambers on the front side are connected to the front pipe 2 via the respective bottom valves 1, the front pipe 2 is connected to the discharge valve 3, and the appropriate number of tanks on the remaining rear side are provided. The chambers are connected to the rear pipe 4 via the respective bottom valves 1, and the rear pipe 4 is connected to another discharge valve 3. Further, in this piping structure, the switching valve is provided between either the front pipe 2 or the rear pipe 4 and the discharge valve 3 (in the illustrated example, between the front pipe 2 and the discharge valve 3). A pump P is interposed via V, and the pump P is driven by a power take-out device attached to the vehicle engine.
The front pipe 2 and the rear pipe 4 are connected via an intermediate gate valve 5. Conventionally, as this intermediate gate valve 5,
A manual opening / closing valve such as a ball valve or a butterfly valve is used, and is opened / closed by a manual handle operation.

[0003] In a tank lorry having such a piping structure, various unloading methods can be implemented. Each time, the intermediate gate valve 5 is opened and closed as necessary. When the next unloading method is performed, the intermediate gate valve 5 must be opened and closed as specified. First, when the same type of oil or the like is loaded in each tank chamber, that is, when the same oil or the like is loaded in each of the front tank chambers and each of the rear tank chambers, When unloading oil and the like from the rear pipe 4 (and the discharge valve 3), and conversely, unloading oil and the like in each rear tank chamber from the front pipe 2 (and the discharge valve 3), Further, (in the illustrated example, in the latter case) the pump P
When the unloading is performed by using the valve, the intermediate gate valve 5 between the front pipe 2 and the rear pipe 4 must always be switched to open. In contrast, when different types of oil or the like are loaded in the front tank chambers and the rear tank chambers,
The oil and the like in the front tank chambers are unloaded from the front pipe 2 (and the discharge valve 3), and different oils and the like in the rear tank chambers are concurrently used to shorten the unloading time. When unloading from the rear pipe 4 (and its discharge valve 3), the intermediate gate valve 5 between the front pipe 2 and the rear pipe 4 must be always switched to the closed state.

[0004]

The following problems have been pointed out in such a conventional example. That is, as described above, when a simultaneous and parallel unloading method for different kinds of oil or the like is performed, the intermediate gate valve 5 must be closed. However, due to inadvertent mistakes such as forgetting the switching operation to the closing (forgetting to close) and an erroneous operation (operational error), the intermediate gate valve 5 is opened and different kinds of oil or the like are supplied from the front pipe 2 and the rear pipe 4. Was often unloaded. In particular, after performing the above-described unloading method for the same kind of oil, etc., the intermediate gate valve 5 is kept open, and afterwards, the above-described unloading method is often performed for different kinds of oil, etc. Was.

[0005] While the intermediate gate valve 5 remains open, different kinds of different oils and the like are simultaneously and concurrently supplied from the front tank chamber and the front pipe 2 and the rear tank chamber and the rear pipe 4. If they are unloaded, a mixed oil and mixed liquid accident will occur. That is, the different kinds of oils and the like unloaded in this way are mixed through the open intermediate gate valve 5, and the different kinds of oils and the like are mixed in the receiving tank of the gas station or the like to which the oil is unloaded. Objects (for example, a mixture of gasoline and light oil, or a mixture of gasoline and kerosene) have sometimes been unloaded. Thus, it is extremely dangerous, and the oil and liquid mixture is unusable and economical loss is large. In addition, it takes a lot of time and labor to recover the work afterwards and restore the cargo receiving tanks such as gas stations. It was pointed out that it was expensive.

The present invention has been made in view of such circumstances, and has been made to solve the problems in the above-described conventional example.
The pump of the pipe is driven by the power take-out device attached to the engine, and the intermediate gate valve between the front pipe and the rear pipe is set to be normally closed and a warning is issued at the time of opening according to claim 1, According to a second aspect of the present invention, there is provided an opening / closing air cylinder having a built-in spring for urging it to close, and a warning means at the time of opening. In a third aspect, a solenoid valve of an air pipe to the air cylinder is further provided. A manual switch or an interlocking switch for energizing the alarm switch or the alarming means; and a control means for disabling the manual switch when the main switch is on and the interlocking switch when the main switch is off. Accordingly, the present invention firstly prevents oil and liquid mixture accidents caused by the intermediate gate valve,
Secondly, another object of the present invention is to propose a tank lorry in which this is realized simply, easily, automatically and reliably.

[0007]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
In the tank lorry, the inside of the tank is divided into a plurality of tank chambers, an appropriate number of tank chambers on the front side are connected to the front pipe via respective bottom valves, and the front pipe is connected to the discharge valve, and An appropriate number of the remaining tank chambers on the rear side are connected to rear pipes via respective bottom valves, and the rear pipes are connected to other discharge valves. At the same time, the front pipe and the rear pipe are connected via an intermediate gate valve, and a pump is provided between one of the front pipe or the rear pipe and the discharge valve via a switching valve. , And the pump is driven by a power take-out device attached to the vehicle engine. The intermediate gate valve is normally set to be closed, and when the power take-out device is driving the pump or other opening, an alarm to that effect is performed.

Next, claim 2 is as follows. That is, in the tank lorry according to the second aspect, in the tank lorry according to the first aspect, the intermediate gate valve is opened and closed by an air cylinder. And the air cylinder is
A spring for urging the intermediate gate valve to close is built in, and when the pressurized air is supplied, the intermediate gate valve is set to be opened against the urging force of the spring. Further, when the intermediate gate valve is opened based on the supply of the pressurized air, an alarm means for executing an alarm to that effect is provided.

Next, claim 3 is as follows. That is, the tank lorry according to the third aspect is the tank lorry according to the second aspect, wherein an electromagnetic valve disposed in an air pipe between the air cylinder and an air source of pressurized air; And a manual switch and an interlocking switch of the power take-off device, and the following control means, which are arranged in parallel with an electric circuit for energizing the means. When the main switch of the vehicle engine or the like is turned on, the control means automatically controls the manual switch to be unenergized and the interlocking switch to be energized. The switch is automatically controlled to be energized, and the interlocking switch is automatically controlled to be non-energized.

Thus, in this tank truck,
The intermediate gate valve between the front pipe and the rear pipe is normally closed by the biasing force of the spring built in the air cylinder, and exceptionally, when pressurized air is supplied to the air cylinder, At the same time as the opening, the warning is performed by the warning means, and the attention of the opening is called. Except for such exceptional cases, the intermediate gate valve is automatically closed at all times. Therefore, when different types of oil or the like are loaded in the front tank chambers and the rear tank chambers, the front tank chambers pass through the front piping from the rear tank chambers to the rear tank chambers. The intermediate gate valve is always closed when unloading different kinds of oil or the like simultaneously and concurrently via the pipes.
That is, it is not necessary to switch the intermediate gate valve to the closed state each time such unloading is performed.

[0011] Then, the intermediate gate valve is switched to open by being energized by a manual switch-on or an interlocking switch of the power take-off device, and the solenoid valve disposed in the air pipe to the air cylinder is switched to open. It is opened by being supplied to the air cylinder. Also, when the main switch of the vehicle engine or the like is turned on, even if the manual switch is turned on, on the other hand, when the main switch is turned off, even if the interlocking switch is turned on, the solenoid valve and alarm means are not energized, and the intermediate partition is turned off. The valve remains closed and no alarm is given. That is, when the main switch is turned on, the interlocking switch is turned on, and when the main switch is turned off, the manual switch is turned on, so that the solenoid valve and the alarm unit are energized, and the intermediate gate valve is opened and the alarm is issued. You.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. 1 and 2 are provided for describing an embodiment of the present invention, FIG. 1 is a piping diagram of piping and air piping, and FIG. 2 is an electric circuit diagram. FIG. 4 is a schematic bottom view of the tank of the tank truck, and FIG. 5 is a side view of the tank truck.

First, the tank truck 6 will be generally described with reference to FIGS. The inside of the tank 7 of the tank lorry 6 is divided into three to seven chambers (seven chambers in the example of FIG. 4, six chambers in the example of FIG. 5, and four chambers in the example of FIG.
), Each of which is divided into a plurality of tank chambers 9 and 10.
Then, liquids such as regular gasoline, high-octane gasoline, kerosene, light oil, and other oils are supplied from the storage tanks of the oil depot to the respective tank chambers 9 through the inlets above the tank chambers 9 and 10 or by using the pump P. , 10 are loaded into the respective tank chambers 9, 10 via the bottom valve 1 at the bottom. In addition,
The same type of oil (eg, regular gasoline) may be loaded in each of the tank chambers 9 and 10, but different types of oil (eg, the front tank chamber 9) are used in the front tank chamber 9 and the rear tank chamber 10. May be loaded with regular gasoline, and the rear tank room 10 may be loaded with kerosene. Further, different tanks 9 and 10 may be loaded with different kinds of oil or the like.

The tank lorry 6 loads and transports such oil and the like in each of the tank chambers 9 and 10 of the tank 7, and unloads the oil to a destination unloading destination, for example, a receiving tank such as a gas station. The unloading from the tank 7 to a receiving tank such as a gas station is performed by the bottom valves 1 of the tank chambers 9 and 10 and then the front pipe 2 having one end branched to each bottom valve 1.
And the rear pipe 4, and the front left and right pipes 11, the rear left and right pipes 12, and the rear pipes 13 connected to the other ends of the front pipe 2 and the rear pipes 4, the front left and right pipes 11, and the rear left and right pipes. A discharge valve 3 with a discharge port 14 connected to the left and right ends and the rear end of the tank 12 and the rear pipe 13 and located at the lower left and right sides and the lower rear end of the tank 7, and the discharge port 14 for unloading.
Is connected to a discharge hose (not shown) having one end connected thereto, a receiving port of a load receiving tank such as a gas station connected to the other end of the discharge hose, and the like. A receiving tank of a gas station or the like is partitioned for each type of, for example, regular gasoline, high-octane gasoline, kerosene, light oil, and other oils, and the discharge hose is selectively connected to one of the ports. The tank lorry 6 may be an integrated motorcycle type shown in the figure or a trailer type in which a trailer loaded with the tank 7 is pulled by a tractor. The tank lorry 6 is generally like this.

Next, with respect to such a piping structure of the tank truck 6, an example shown in FIG. 4 will be described first. In this piping structure, an appropriate number (three chambers in the illustrated example) of tank chambers 9 on the front side are branched into front pipes 2 which gradually descend to the rear along the longitudinal direction via respective bottom valves 1. The front pipe 2 is connected to one end and the left and right discharge valves 3 with the discharge port 14 via the front left and right pipes 11. Also, an appropriate number of the remaining rear side (four chambers in the example shown)
Is connected via a bottom valve 1 to a branched one end of a rear pipe 4 which gradually declines to the front side along the longitudinal direction, and the rear pipe 4 is connected to the rear side. The left and right pipes 12 are connected to left and right discharge valves 3 with discharge ports 14. The front pipe 2 and the rear pipe 4 are connected via an intermediate gate valve 15 near the center.

That is, in the example of FIG. 4, the front pipe 2 and the rear pipe 4 are connected to an intermediate pipe 16 having a front end connected to the rear end of the front pipe 2 and a rear end connected to the rear left and right pipes 12. The intermediate pipe 16 is provided with an intermediate gate valve 15. In the example of FIG. 4, the front end of the left rear pipe 13 is connected near the center of the rear left and right pipes 12, and the discharge port 1 is connected to the rear end of the left rear pipe 13.
4 is connected, and the front left and right pipes 11 are connected.
The front end of the right rear pipe 13 is also connected to the vicinity of the center, and the discharge port 14 is also connected to the rear end of the right rear pipe 13.
The attached discharge valve 13 is connected. In the figure, reference numeral 17 denotes a rear switching valve disposed near the front end of each rear pipe 13.

Next, the piping structure shown in FIG. 1 will be described. The piping structure shown in FIG. 1 is similar to that of FIG. 4 described above, but is more simplified and shown. That is, the front tank chamber 9 (two chambers in the illustrated example) is branched and connected to the front pipe 2 via the bottom valve 1, and the rear tank chamber 10 (two chambers in the illustrated example).
) Are respectively connected to the rear pipe 4 via the bottom valve 1. One end of a front left and right pipe 11 which is bent in the middle is connected to the front pipe 2, and the other end of the front left and right pipe 11 is provided with a discharge valve 3 with a discharge port 14. One end of a rear left and right pipe 12 is connected to the other end, and the other end of the rear left and right pipe 12 has a discharge valve 3 having a discharge port 14.
Is connected. The extended rear end of the front pipe 2 and the extended front end of the rear pipe 4 are connected to the intermediate gate valve 1.
5 are connected.

The piping structure shown in FIGS. 1 and 4 is of a type having a pump P. That is, in the example of FIG. 4, the front pipe 2 is connected to the vicinity of the center of the front left and right pipes 11 via the bent interposed pipe E, and a four-way switching valve or the like is connected near the bent portion of the interposed pipe E. Valve V is provided,
In the example of FIG. 1, a switching valve V such as a four-way switching valve is provided near a bent portion of the front left / right pipe 11 that is bent halfway. In both of the illustrated examples, an outlet and an inlet of the pump P are connected to the switching valve V via a reciprocating branch pipe F. Thus, by switching the switching valve V, which is a four-way switching valve, to the pump discharge position and rotating the pump P, the unloading by the pump P is performed, and the switching valve V is switched to the gravity discharge position. Thus, unloading by gravity without using the pump P is performed. Furthermore,
By switching the switching valve V to the pump suction position and driving the pump P in the reverse direction, loading using the pump P is performed, and by switching the switching valve V to the stop position, these are operated. It will be in a state that can not be done. In addition, such a pump P is indispensably used for unloading when the receiving tank is located higher than the tank lorry 6, while use of the pump P is completely prohibited for unloading gasoline. Have been.

As described above, in this piping structure, a four-way switching valve or the like is connected between either the front pipe 2 or the rear pipe 4 regardless of the illustrated example and the discharge valve 3 as in the illustrated examples. A pump P is interposed via a valve V. The pump P is driven by a power take-off device H attached to the vehicle engine G, as shown in FIG. That is, the vehicle engine G has a P.O. T. O. A power take-out device H as a device is provided, and a pump P is provided to the power take-out device H via a shaft, a pump, a hydraulic circuit, a hydraulic motor, and the like (not shown). Thus, by driving the vehicle engine G, the hydraulic motor is rotationally driven via the power take-out device H and the like, and the unloading and loading pump P is rotationally driven by using the hydraulic motor as a drive source. (There is also a power take-out device H of a type in which no hydraulic system is interposed regardless of this). This piping structure is provided with the pump P as described above.

Next, the intermediate gate valve 15 and the like will be described with reference to FIGS. The intermediate gate valve 15 is normally set to be closed, and the pump P
At the time of driving or other opening, an alarm to that effect is issued. That is, the intermediate gate valve 15 is opened and closed by an air cylinder 18, and the air cylinder 18 has a built-in spring 19 for urging the intermediate gate valve 15 to close, and when the pressurized air is supplied, the spring 19 is opened.
Alarm means 20 which is set to switch the intermediate gate valve 15 to open against the urging force of the above, and which issues an alarm to that effect when the intermediate gate valve 15 is opened based on the supply of pressurized air. Have been. And further, the next solenoid valve 23
, The manual switch 25 and the interlock switch J, and the control means 2
7 are provided. That is, the air cylinder 1
, An electromagnetic valve 23 disposed in an air pipe 22 between the air source 21 and the pressurized air,
Manual switch 25 and the interlocking switch J of the power take-off device H disposed in parallel with the electric circuit 24 for energizing the
When the main switch 26 of the vehicle engine G or the like is turned on, the manual switch 25 is automatically turned off so that the interlocking switch J can be turned on. When the main switch 26 is turned off, the manual switch 25 is turned on. Control means 27 for automatically controlling the interlocking switch J so as not to be energized,
Is provided.

These will be described in more detail. As the air source 21 shown in FIG. 1, an air tank that is also used for braking the tank truck 6 is used. In addition, a protection valve 28, a three-way valve 29, a pressure regulating valve 30, a pressure regulating valve 30, and an air pipe 22 between the air tank 21 serving as the air source 21 and the air cylinder 18 are arranged in this order from the upstream side.
An electromagnetic valve 23 and the like are interposed.

First, the protection valve 28 controls the pressurized air so that it cannot pass downstream of the air pipe 22 unless the pressure of the pressurized air in the air tank as the air source 21 exceeds a predetermined value. That is, since the pressurized air from the air source 21 is also used for braking the tank truck 6, the protection valve 28 is used as a safety device for maintaining the pressure for braking. The pressure adjusting valve 30 functions to adjust the pressure of the pressurized air in the air pipe 22 from the primary pressure on the upstream side to the secondary pressure on the downstream side suitable for use.

The solenoid valve 23 is opened by energization and excitation, that is, the air pipe 22 is switched from closed to open, so that pressurized air from the air source 21 flows down to the air cylinder 18 downstream. On the other hand, the solenoid valve 23 is normally closed when not energized or excited, that is, the solenoid valve 23 closes the upstream side (inside / main pressure side) of the air pipe 22 and the downstream side (out side) is connected to exhaust to outside air. Be replaced.

In the air cylinder 18, the end of the piston rod 31 is connected to the intermediate gate valve 15 via the interposition member 32.
Connected to the open / close control unit. Air cylinder 1
8, a spring 19 is interposed between the distal end side and the piston 33 in a resilient state. The spring 19 causes the piston rod 31 to retreat by its urging force, and the interposition member 32 Through the intermediate gate valve 15
Is normally closed. In contrast, air piping 2
When the pressurized air is pressed into the cylinder chamber between the base end side of the air cylinder 18 and the piston 33 via the piston 2, the piston rod 31 moves forward against the urging force of the spring 19, and the The intermediate gate valve 15 is switched to open via 32, and the intermediate gate valve 15 is kept open while the pressurized air is being supplied. The intermediate gate valve 15 and the air cylinder 18 are configured as described above.

Next, the electric circuit 24 and the control means 27 shown in FIG.
Is described. The electric circuit 24 from the power supply 34 is branched in parallel on the way. First, the one-side branched electric circuit 24 passes through a fuse 35 and then is further arranged in parallel (the upper side in the drawing). The relay contact 36 and the interlocking switch J and the other (lower side in the drawing) relay contact 36
And the manual switch 25, the solenoid valve 23
Connected to the control unit. On the other hand, the branched electric circuit 24 (the lowermost row in the drawing) passes through the main switch 26 and the fuse 37 and then further passes through the relay coil 38.
And a drive unit for the vehicle engine G (see FIG. 1) and other (not shown).

More specifically, the manual switch 25 first turns on and off the electric circuit 24 by manual operation, enables the solenoid valve 23 and the like to be energized when turned on (closed, continued), and turns off the electromagnetic valve 23 when turned off (open, cut off). 23 and the like are not energized. Next, the interlocking switch J of the power take-out device H of the vehicle engine G is firstly driven by a manual operation of the power take-off device H to turn on and off the electric circuit 24 in accordance with the driven type. A dual-purpose type, in which the drive ON / OFF of the device H and the ON / OFF of the electric circuit 24 are performed in conjunction with each other by manual operation, and both types are possible. Next, a relay is adopted as the control means 27 in the illustrated example, and a relay coil 38 and both relay contacts 36 are used.
It is composed of The two relay contacts 36 have a double structure, and one (upper side in the drawing), ie, the relay contact 36 on the interlocking switch J side, and the other (lower side in the drawing), ie, the relay contact 36 on the manual switch 25 side. Is set so that opening and closing (intermittent) are reversed.

That is, as shown in the figure, when the main switch 26 is off (open, cut off), first, the manual switch 2 is turned on.
The relay contact 36 on the fifth side is set to closed (continuous), so that the manual switch 25 is turned on (closed, continuous) regardless of the illustration.
By doing so, the solenoid valve 23 and the like can be energized. Further, as shown, the main switch 26 is turned off (open,
In the case of (disconnection), the relay contact 36 on the interlocking switch J side is set to open (disconnecting). Therefore, even if the interlocking switch J is turned on (closed, continued) irrespective of the illustration, power cannot be supplied and the solenoid valve J 23 and the like are not energized. On the other hand, although not shown, when the main switch 26 is on (closed, continuous), the vehicle engine G and the like are energized and driven, and the relay coil 38 is energized and excited. Switches to the opposite. That is, first, the relay contact 36 on the manual switch 25 side is switched to open (disconnected), not shown,
Therefore, even if the manual switch 25 is turned on (closed and continued), the power cannot be supplied and the solenoid valve 23 and the like are not supplied with electricity. Also, the main switch 26 is turned on (closed,
In the case of (continuation), the relay contact 36 on the interlock switch J side is switched to close (continuation) irrespective of the illustration.
Is turned on (closed, continued) irrespective of the illustration, the solenoid valve 23 and the like are energized.

As described above, the control means 27 comprising a relay
First, the manual switch 25 is automatically controlled so as not to be energized when the main switch 26 of the vehicle engine G or the like is turned on (closed, continued), and the main switch 26 is turned off (open,
Only when the switch is turned off, the switch is automatically controlled to be energized by turning on (closed or connected). On the other hand, the interlocking switch J is turned on (closed, continued) only when the main switch 26 is turned on (closed, continued).
, And is automatically controlled to be non-energizable when the main switch 26 is turned off (open, cut off). As described above, only one of the manual switch 25 and the interlocking switch J is selectively switched to be energized by the control unit 27. The electric circuit 24 and the control means 27 shown in FIG.
Is like this.

Next, the alarm means 20 of FIG. 1 will be described. As the alarm means 20 in the illustrated example, a cab 39 (FIG.
Buzzer 40 and lamp 41 disposed in the
A buzzer 42 and an indicator 43 disposed below the tank 7 (see FIG. 5 and the like) outside the cab 39 are used.

First, a buzzer 40 constituting the alarm means 20
The lamp 41 is branched in parallel from the electric circuit 24 between the manual switch 25 or the interlocking switch J and the control unit of the solenoid valve 23. Accordingly, when the solenoid valve 23 is energized by turning on (closing and continuing) the manual switch 25 and the interlocking switch J, that is, when the intermediate gate valve 15 is controlled to be opened by the solenoid valve 23 and the air cylinder 18, During that time, the buzzer 40 and the lamp 41 continue to operate, such as sounding or lighting, and an alarm is issued to open the intermediate gate valve 15. The buzzer 40 and the lamp 41 are also used for confirming the operation of the electric circuit 24 between the manual switch 25 or the interlock switch J and the solenoid valve 23.

On the other hand, a buzzer 42 and an indicator 43 constituting the alarm means 20 are connected to the air pipe 22 between the solenoid valve 23 and the air cylinder 18 by the signal air pipe 4.
4 are connected to each other. That is, reference numeral 45 denotes a pressure switch. When the pressure switch 45 detects the air pressure of the pressurized air supplied to the air cylinder 18 via the signal air pipe 44, the pressure switch 45 and the manual switch 25 or the interlock switch J The branch circuit 46 branched from the electric circuit 24 to the valve 23 is turned on (closed, continuous).
During this time, the buzzer 42 continues to sound and operates, and the pressurized air is actually supplied to the air cylinder 18, thereby issuing a warning that the intermediate gate valve 15 is opened.
Also, the indicator 43 conforms to this, and the signal air pipe 4
4, when the air pressure of the pressurized air supplied to the air cylinder 18 is detected, the lamp is turned on and activated to display a lamp, thereby indicating that the intermediate gate valve 15 is opened. Is carried out. The buzzer 42 and the indicator 43 are also used for confirming the operation of the solenoid valve 23. If the buzzer 42 and the indicator 43 do not operate even if the manual switch 25 or the interlocking switch J is turned on (closed or continued). First, it is determined that the solenoid valve 23 has failed.

Note that a so-called air horn may be used instead of the buzzer 42, but in this case, there is a disadvantage that the consumption of pressurized air becomes large. That is,
A branch pipe having one end connected to the air pipe 22 and the other end open to the outside air is provided at that position instead of the signal air pipe 44, and an air horn is provided near the other end of the branch pipe, When the pressurized air is supplied to the air pipe 22, the air horn may be operated via this branch pipe, and a warning that the intermediate gate valve 15 is open may be issued. However, in this case, since the pressurized air is discharged to the outside air through the branch pipe or the air horn, there is a problem that the consumption of the pressurized air increases. On the other hand, using the pressure switch 45 as shown in FIG.
If the method of operating the buzzer 42 by detecting the supply of pressurized air in Step 2 is adopted, there is an advantage that unnecessary consumption of pressurized air is avoided. The alarm means 20 is configured as described above.

The present invention is configured as described above. Then, it becomes as follows. As described above, in the tank truck 6, the intermediate gate valve 15 between the front pipe 2 for the front tank chambers 9 and the rear pipe 4 for the rear tank chambers 10 always has the air cylinder 18 Since the pressurized air is not supplied to the air cylinder 18, the air cylinder 18 is closed by the urging force of the spring 19 built in the air cylinder 18. The intermediate gate valve 15 is exceptionally provided with the air cylinder 1
8 is opened by the supply of pressurized air, and in that case, the alarm is continuously performed by the alarm means 20 such as the buzzer 40, the lamp 41, and the buzzer 42 and the indicator 43, and the intermediate gate valve is operated. The operator is warned that 15 is open.

By the way, pressurized air to the air cylinder 18 can be supplied from an air source 21 through an air pipe 22.
Are arranged. The solenoid valve 23 is energized when the manual switch 25 or the interlocking switch J is turned on and is switched to the open state. As a result, pressurized air is supplied to the air cylinder 18 and the intermediate gate valve 15 is opened. Becomes When the main switch 26 of the vehicle engine G or the like is turned on, the manual switch 25 is turned on, and when the main switch 26 is turned off, the interlocking switch J is turned on. The alarm means 20 such as the lamp 41 is not energized, and the pressurized air is supplied to the air cylinder 1.
8 not supplied. Accordingly, the intermediate gate valve 15 is kept closed, and the warning by the warning means 20 such as the buzzer 40, the lamp 41, the buzzer 42, and the indicator 43 is not performed. Easily recognizes and confirms that the intermediate gate valve 15 does not open.

The intermediate gate valve 15 is automatically closed at all times. When the intermediate gate valve 15 is opened due to the turning on of the interlocking switch J when the main switch 26 is turned on or the turning on of the manual switch 25 when the main switch 26 is turned off, a warning to that effect is issued. It is implemented and calls attention. The tank lorry 6 has a piping structure provided with such an intermediate gate valve 15, and can perform various unloading methods. Typically, the following unloading methods are performed.

First, the unloading method using the pump P is as follows. That is, each tank chamber 9, 10
When the same type of oil or the like is loaded on the front side, that is, when the same oil or the like is loaded on the front tank chamber 9 and the rear tank chamber 10, the oil in the rear tank chamber 10 Also, when unloading via the rear pipe 4, the intermediate gate valve 15, the front pipe 2, the front left and right pipe 11, the switching valve V, the branch pipe F, the pump P, the discharge valve 3, the discharge port 14, etc. About:

First, a discharge hose is connected between the discharge port 14 to be unloaded and the port of a receiving tank such as a gas station. Then, the switching valve V composed of a four-way switching valve is switched to the pump discharge position, and the main switch 26 of the tank lorry 6 that is stopped is turned on. Then, the control means 27 using the relay is switched, and the power take-out device H
Is turned on, the pump P is driven and the buzzer 4 is turned on.
The alarm means 20 such as 0 or the lamp 41 is energized and activated,
Thereafter, the alarm is continuously performed, and the solenoid valve 23 is energized and excited to be switched to the open state. Accordingly, pressurized air from the air source 21 is supplied to the air cylinder 18, the intermediate gate valve 15 is opened, the buzzer 42 operates via the pressure switch 45, and the indicator 43 also operates.
The warning by the warning means 20 is continuously performed thereafter. Then, the normally closed bottom valves 1 of the tank chambers 9 and 10 are switched to open (of course, some of the tank chambers 9 and 1 are not switched without switching all the bottom valves 1 of each tank chamber 9 and 10).
It is also possible to switch only the bottom valve 1 of the tank chamber 9 to open.) By switching the normally closed discharge valve 3 near the discharge port 14 to which the discharge hose is connected to open, the tank chambers 9 and 1 are opened.
The unloading of the oil and the like loaded in the tank 0 to a receiving tank such as a gas station is started. During such unloading, that is, while the intermediate gate valve 15 is open, the warning by the warning means 20 is continuously performed.

When unloading is completed, when the interlocking switch J of the power take-out device H is turned off (opened or cut off), the energization and excitation of the solenoid valve 23 are released, and the solenoid valve 23 is switched from open to closed. Accordingly, the pressurized air is no longer supplied to the air cylinder 18, and the intermediate gate valve 15 is switched from open to closed by the urging force of the spring 19. And the intermediate gate valve 15
Is kept closed thereafter. At the same time, the alarm means 20 such as the buzzer 40, the lamp 41, the buzzer 42, and the indicator 43 also stop operating and no alarm is given. The pressurized air in the air cylinder 18 is exhausted to the outside air via the electromagnetic valve 23. Then, the discharge valve 3 is switched from open to closed, the bottom valve 1 is also switched from open to closed, and the discharge hose between the discharge port 14 and the receiving port of a receiving tank such as a gas station is unloaded, thereby unloading. Unloading by the method ends.

Next, a method of unloading by gravity discharge without using the pump P when the same kind of oil or the like is loaded in each of the tank chambers 9 and 10 is as follows. That is, the oil and the like in each of the front tank chambers 9 is also supplied to the front pipe 2, the intermediate gate valve 15, the rear pipe 4, the rear left and right pipe 12,
When unloading via the discharge valve 3 or the discharge port 14, etc., and conversely, the oil etc. of each tank chamber 10 on the rear side also
Rear pipe 4, intermediate gate valve 15, front pipe 2, switching valve V,
The unloading method at the time of unloading via the front left and right pipes 11, the discharge valve 3, the discharge port 14, and the like is as follows.

First, a discharge hose is connected between the discharge port 14 to be unloaded and the port of a receiving tank such as a gas station. A switching valve V composed of a four-way switching valve is
The operation is appropriately switched to the gravity discharge position or the stop position. In this case, the main switch 26 of the stopped tank truck 6 is turned off, and only the manual switch 25 can be energized.
As a result, the alarm means 20 such as the buzzer 40 and the lamp 41 are energized to operate, and thereafter the alarm is continuously performed, and the electromagnetic valve 23 is energized and excited to be switched to open.
In the same manner as described above, pressurized air from the air source 21 is supplied to the air cylinder 18, the intermediate gate valve 15 is switched to open, and the buzzer 42 operates via the pressure switch 45, and The indicator 43 is also activated, and the warning by the warning means 20 is continuously performed thereafter. Then, the normally closed bottom valve 1 of each of the tank chambers 9 and 10 is switched to open, and the discharge port 1 to which the discharge hose is connected is connected.
By switching the normally closed discharge valve 3 in the vicinity of 4 to open, the unloading of oil and the like loaded in the tank chambers 9 and 10 to a load receiving tank such as a gas station is started. During such unloading, that is, while the intermediate gate valve 15 is open, the warning by the warning means 20 is continuously performed.

When unloading is completed, the manual switch 25 is turned off (opened and cut off), so that the energization and excitation of the solenoid valve 23 are released as in the case described above, and the solenoid valve 2 is turned off.
3 is switched from the open state to the closed state.
The intermediate gate valve 15 is switched from open to closed by the urging force of the spring 19. Then, the intermediate gate valve 15 is kept constantly open thereafter. At the same time, the alarm means 20 such as the buzzer 40, the lamp 41, the buzzer 42, and the indicator 43 also stop operating and no alarm is given. The pressurized air in the air cylinder 18 is exhausted to the outside air via the electromagnetic valve 23. Then, the discharge valve 3 is switched from open to closed, the bottom valve 1 is also switched from open to closed, and the discharge hose between the discharge port 14 and the receiving port of a receiving tank such as a gas station is unloaded, thereby unloading. Unloading by the method ends.

On the other hand, a method of unloading by gravity discharge without using the pump P, which is carried out when different kinds of oil or the like are loaded in the front tank chambers 9 and the rear tank chambers 10, respectively. Is as follows, that is, the oil and the like in the front tank chamber 9 are unloaded via the front pipe 2, the switching valve V, the front left and right pipes 11, the discharge valves 3 and the discharge ports 14, and the like. At the same time, different types of oil and the like in each of the rear tank chambers 10 are supplied to the rear pipe 4 and the rear left and right pipes 1.
2, The unloading method at the time of unloading via the discharge valve 3 and the discharge port 14 is as follows.

In this case, the discharge hoses are first connected between the two discharge ports 14 and the corresponding ports of a load receiving tank such as a gas station. At the same time, the switching valve V composed of a four-way switching valve is switched to the gravity discharge position. Then, the normally closed bottom valve 1 of each tank chamber 9 and 10
And, of course, only the bottom valves 1 of some of the tank chambers 9 and 10 are opened without switching all the bottom valves 1 of the tank chambers 9 and 10 to open as in the case described above. By switching both normally closed discharge valves 3 near the discharge port 14 to which the discharge hose is connected, the oil and the like stored in the tank chambers 9 and 10 can be respectively switched. , And is unloaded to a receiving tank such as a gas station via an individual discharge hose. When unloading is completed, both discharge valves 3 are switched from open to closed, each bottom valve 1 is also switched from open to closed, and the discharge between both discharge ports 14 and the corresponding receiving port of a receiving tank such as a gas station. Unloading by the unloading method is completed by removing the hoses. When such unloading is performed, the intermediate gate valve 15 is always closed.

The tank lorry 6 has a piping structure provided with such an intermediate gate valve 15. Then, the following first and second cases are obtained. First, this intermediate gate valve 1
5 is a manual switch 25 and an interlocking switch J,
ON (closed, continued) under predetermined conditions of main switch 26
Unless otherwise, the spring 19 always closes automatically. Therefore, as described above, even when simultaneously loading and unloading different kinds of oil and the like loaded in the front and rear tank chambers 9 and 10, the intermediate gate valve 15 is always kept closed. At the time of such unloading, it is not necessary to switch the intermediate gate valve 15 to close each time.

Therefore, there is no risk of the switching operation being forgotten or erroneous operation. In particular, after the above-described unloading method performed with the intermediate gate valve 15 opened, the intermediate gate valve 15 is closed afterwards. When the above-described unloading method is performed, there is no risk of the switching operation being forgotten or erroneously operated. When the intermediate gate valve 15 is opened by the manual switch 25 or the interlocking switch J in exceptional cases, an alarm to that effect is executed by the alarm means 20 to call attention. From the aspect, forgetting and erroneous operation of the switching operation can be prevented. Further, when the main switch 26 of the vehicle engine G or the like is turned on, even if the manual switch 25 is turned on,
6, when the interlock switch J of the power take-off device H is turned on, the pressurized air is not supplied to the intermediate gate valve 15, and the intermediate gate valve 15 is forcibly maintained closed. From this aspect, erroneous operation is prevented.

Second, the tank truck 6 with the pump P
The solenoid valve 2 is connected to the air pipe 22 to the air cylinder 18 by opening and closing the intermediate gate valve 15 with an air cylinder 18 with a built-in spring 19.
3 and the electric circuit 24 to the solenoid valve 23 is provided with a manual switch 25, an interlocking switch J, and a control means 27 comprising a relay. Thus, with such a simple configuration, the above-described first point is easily realized, and the above-mentioned first point is automatically and reliably realized by the spring 19, the alarm means 20, the control means 27, and the like. Is done.

[0047]

As described above, in the tank lorry according to the present invention, the pump of the pipe is driven by the power take-out device attached to the engine, and the intermediate gate valve between the front pipe and the rear pipe is provided. In claim 1, an alarm is set when the door is normally closed and an alarm is issued when the door is opened. In claim 2, an opening / closing air cylinder having a built-in spring for urging the door closed and an alarm means for opening are provided. In 3, the solenoid valve of the air pipe to the air cylinder, the manual switch and interlock switch for energizing the solenoid valve and alarm means, the manual switch when the main switch is on, and the interlock switch when the main switch is off The following effects are exhibited by providing control means for disabling energization.

First, oil mixing and liquid mixture accidents caused by the intermediate gate valve are prevented. That is, the intermediate gate valve between the front pipe and the rear pipe of the tank lorry is always closed by the spring of the air cylinder, and is opened only when the pressurized air is supplied to the air cylinder. And in that case, an alarm is implemented by the alarm means,
Attention is raised by appealing to sight and hearing.

When the main switch of the vehicle engine or the like is turned on, that is, after the vehicle engine is turned on and started, the pressurized air is supplied to the air cylinder via the solenoid valve even if the power supply manual switch is turned on. The intermediate gate valve remains closed as expected. On the other hand, when the main switch of the vehicle engine or the like is turned off, that is, after the vehicle engine is turned off, even if the interlocking switch of the power take-off device is turned on, the pressurized air is similarly supplied to the air cylinder via the electromagnetic valve. Nevertheless, the intermediate gate valve maintains the expected closure. At the same time, no alarm is issued by the alarm means, so that it is easily recognized and confirmed that the intermediate gate valve does not open.

In the case where different types of oil or the like are loaded in the front tank chambers and the rear tank chambers, the front tank chambers are connected to the rear tank chambers via the front pipes. From then on, when unloading different kinds of oil and the like simultaneously and simultaneously via the rear pipe, the intermediate gate valve between the front pipe and the rear pipe is always closed as described above. If the intermediate gate valve is open, a warning to that effect is also issued. Therefore, in such unloading, it is not necessary to switch the intermediate gate valve to the closed state as in the above-described conventional example, so that forgetting the switching operation (inadvertent mistake due to forgetting to tighten) is prevented. At the same time, there is no danger of erroneous operation (inadvertent error due to operation error) due to the alarm. In particular, the intermediate gate valve is opened when loading the same type of oil, etc., using a pump in each tank chamber, or the intermediate gate valve is opened for subsequent unloading by pump or gravity. Is prevented from being open.

In this way, different types of unloading oil and the like do not mix through the open intermediate gate valve.
In a receiving tank at a gas station or the like where the cargo is to be unloaded,
It is possible to prevent a mixture of different types of oils and the like from being unloaded. In this way, oil and liquid mixture accidents are prevented, safety is improved, dangers are avoided, and there is no economic loss due to inability to use, and furthermore, labor and cost for subsequent recovery and restoration work are avoided. .

Second, and yet this is simple, easy, automatic and reliable. In other words, this tank lorry with a pump opens and closes the intermediate gate valve with an air cylinder with a built-in spring, and sets it to normally closed. It has a simple configuration in which switches, interlock switches, control means, and the like are provided. Therefore, prevention of the first oil-mixing and liquid-mixing accidents described above can be easily realized by such a simple configuration. Moreover, this can be realized automatically and reliably by the spring, the alarm means, the control means and the like. In this way, the problem existing in this kind of conventional example is surely solved,
The effects exhibited by the present invention are remarkably large.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a tank lorry according to an embodiment of the present invention, which is used for describing an embodiment of the present invention, and is a piping diagram of piping and air piping.

FIG. 2 is an electric circuit diagram for explaining the embodiment of the present invention.

FIG. 3 provides a description of a conventional tank lorry of this type;
It is a piping diagram.

FIG. 4 is a schematic bottom view of a tank of a tank truck.

FIG. 5 is a side view of the tank truck.

[Explanation of symbols]

 Reference Signs List 1 bottom valve 2 front pipe 3 discharge valve 4 rear pipe 6 tank lorry 7 tank 9 front tank chamber 10 rear tank chamber 15 intermediate gate valve 18 air cylinder 19 spring 20 alarm means 21 air source 22 air pipe 23 electromagnetic Valve 24 Electric circuit 25 Manual switch 26 Main switch 27 Control means 40 Buzzer (warning means) 41 Lamp (warning means) 42 Buzzer (warning means) 43 Indicator (warning means) G Vehicle engine H Power take-out device J Interlock switch P Pump V Switching valve

Claims (3)

[Claims] 1. The tank is divided into a plurality of tank chambers,
An appropriate number of the tank chambers on the front side are connected to the front pipe via respective bottom valves, the front pipe is connected to the discharge valve, and the appropriate number of the tank chambers on the rear side are respectively provided. The bottom pipe is connected to the rear pipe, the rear pipe is connected to another discharge valve, and the front pipe and the rear pipe are connected via an intermediate gate valve, and A pump is interposed between either the front pipe or the rear pipe and the discharge valve via a switching valve, and the pump is driven by a power take-out device attached to a vehicle engine. The intermediate gate valve is set to be normally closed, and when the pump is driven by the power take-off device or when the pump is opened, an alarm to that effect is performed. Tank truck. 2. The tank lorry according to claim 1, wherein the intermediate gate valve is opened and closed by an air cylinder, and the air cylinder has a built-in spring for urging the intermediate gate valve to close and pressurizes the air. When the air is supplied, it is set to switch the intermediate gate valve to open against the urging force of the spring, and when the intermediate gate valve is opened based on the supply of the pressurized air, an alarm to that effect is provided. The tank lorry is provided with alarm means for performing the following. 3. The tank lorry according to claim 2, wherein an electromagnetic valve disposed in an air pipe between the air cylinder and an air source of pressurized air, and a power supply to the electromagnetic valve and the alarm means. When a main switch such as a vehicle engine is turned on, a manual switch and an interlocking switch of the power take-off device are disposed in parallel with the electric circuit. And a control means for automatically controlling the manual switch so that the manual switch can be energized and the interlocking switch so as not to be energized when the main switch is turned off.