JPH086800Y2 - Shipping device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a shipping apparatus, and more particularly to a shipping apparatus having a configuration suitable for mixing a small amount of an additive with an oil liquid shipped via a liquid supply line. .

2. Description of the Related Art For example, in a shipping device for shipping an oil liquid such as gasoline into a tank of a tank truck, a fixed amount of additive is injected into a unit liquid amount of 1 kl, and a fixed amount of additive is injected into the tank. A so-called blend shipment is performed in which the oil liquid mixed in a ratio is shipped.

Examples of the additive include a colorant for identification for confirming the oil type, an engine fuel consumption improver added to fuel such as gasoline, and the like. And the additive is, for example,
A small amount such as 400 cc is often injected for 1 kl of oil liquid.

As a shipping device for performing such blended shipping, for example, a mixing ratio setting device for setting the mixing ratio and a control valve for adjusting the injection amount of the additive are provided at the shipping site, and the mixing ratio of the oil liquid and the additive is provided. A method to control the blending by opening and closing the control valve according to the control signal from the mixing ratio controller, in which the injection line for the additive is provided separately from the liquid supply line for shipping the oil liquid. A method to perform fixed-quantity shipment control and blend control by means of a flow meter, a metering valve, a preset counter, etc., installed in each injection line, and an additive injection line after the oil liquid has been loaded into the tank truck tank on the liquid supply line. A method of injecting an additive according to the supply amount of oil liquid by loading the oil liquid into the tank of the tank truck via the liquid supply line, and then the operator injects the additive in the container from the insertion port of the tank. There is a method to do, etc.

Problems to be Solved by the Invention However, the above-described conventional shipping apparatus has the following problems.

In this case, since the mixing ratio setting device, the mixing ratio controller, the control valve, etc. are expensive, there is a problem that the equipment is too expensive.

In the case of, the injection amount of additives (coloring agent for identification, etc.) injected into the oil liquid is set to a fixed amount per unit liquid supply, and the shipping of the oil liquid into the tank of the tank truck is fixed. Since it is performed in a unit of quantity, there is a problem in that there is a lot of waste in the system to measure the injection flow rate of the additive with a flow meter dedicated to the injection line and control the metering valve with the preset counter.

In this case, since the blending method is rough, there is a problem that the oil liquid and the additive are not mixed in a fixed ratio as a whole.

In this case, since the operator manually loads the additives in the container according to each shipping amount, it takes a lot of time to load the additives, and the amount of the additive to the oil liquid supply amount may be wrong. There is a problem such as that.

Further, when the blend shipping system is added to the existing shipping apparatus that does not have the blend shipping function, if the same configuration as that of the above-mentioned conventional shipping apparatus is attempted, the installation work of the equipment becomes large.

Further, in order to solve the above problems, it has been considered to inject a fixed amount of additive at a predetermined flow rate using a metering pump, but there are the following problems.

That is, when the metering valve is half-opened or half-closed and the flow rate of the liquid is small, the fluid pressure on the upstream side of the metering valve is higher than when the metering valve is fully opened and the large flow rate,
There is a problem that the mixed solution is injected into a place where the pressure is high, so that the mixed solution cannot be smoothly injected, and the load applied to the metering pump is large and it is difficult to inject the mixed solution into the liquid supply passage.

Moreover, in the case where the metering pump is simply operated according to the number of flow rate pulses, if the metering pump is activated when it reaches a predetermined flow rate while the flow rate is restricted to a small flow rate, the flow rate is small and small. At the flow rate, the additive cannot be sufficiently stirred and cannot be mixed uniformly.

Then, this invention aims at providing the shipping apparatus which solved the said subject.

Means for Solving the Problems The present invention is a metering valve for switching a flow rate of a liquid between a small flow rate and a large flow rate by switching a valve opening degree in two stages,
Through a liquid supply passage provided with a flow meter, the valve opening of the metering valve is fully closed, half open, fully open, half closed, so that the flow rate of the liquid is small, large, and small. In a shipping device that controls shipping in a closed state, the suction side communicates with a mixed solution tank that stores a mixed solution to be mixed with the liquid, and the discharge side is located upstream of the position where the metering valve of the liquid supply path is provided. A mixed liquid supply pipe communicating with the side, a fixed amount pump which is provided in the mixed liquid supply pipe and discharges a predetermined amount of the mixed liquid to the liquid supply passage by one operation, and when the flow rate of the liquid is a large flow rate. And a liquid mixture control means for operating the metering pump a preset number of times each time a predetermined unit liquid supply amount of the liquid is measured by the flow meter.

Effect According to the present invention, in a shipping apparatus in which the flow rate of a liquid is changed to a large flow rate and a small flow rate by changing the valve opening of the metering valve, the relationship between the flow rate of the liquid and the operation timing of the quantitative pump is related. By controlling, the following effects can be obtained.

When a mixture of additives such as oil is mixed and shipped for blending, the injection amount of the mixture can be controlled by the number of times the metering pump operates, and a metering pump can be used every time a predetermined unit liquid supply of oil is measured. Control can be performed easily by simply activating.

In addition, when retrofitting the existing equipment that can feed only one type of oil liquid to a blend shipping system that can mix mixed liquids such as additives, etc., a mixed liquid supply pipe will be installed and a fixed amount will be provided in this mixed liquid supply pipe. Since a pump may be provided, the construction can be done relatively easily.

Inject the mixed liquid when the flow rate of the liquid is small, that is, when the pressure in the liquid supply line piping is lower than when the metering valve is half-opened or half-closed, that is, when the metering valve is fully open and the liquid flow rate is large. Therefore, the load on the metering pump is small,
It is easy to inject the mixed liquid into the liquid supply path.

When the metering valve is fully opened and the liquid flow rate is high,
The flow of the liquid promotes agitation in the liquid supply passage, and the mixed liquid and the liquid can be uniformly blended.

When the metering pump operates at a small flow rate when the metering valve is closed halfway when the liquid supply is finished, the mixed liquid may remain in the liquid supply path when the metering valve is fully closed. But,
By mixing the mixed solution into the liquid supply path while the metering valve is fully opened and at a high flow rate, the metered valve is semi-closed even after the final mixing at the end of shipment, and the mixed solution is mixed by the liquid flowing at a small flow rate. The liquid mixture is pushed out and does not remain in the pipe.

Embodiment FIG. 1 is a block diagram showing a main part of an embodiment of a shipping apparatus according to the present invention, and FIG. 2 is a schematic configuration diagram of the entire shipping apparatus.

The shipping control circuit 1 of the shipping apparatus has unit liquid supply amount liquid supply determination means 2 as liquid mixture control means shown in FIG.
Also, in the shipping device, when an oil liquid such as gasoline and a colorant for identification or a fuel efficiency improving agent are blend-shipped, for example, a fixed amount (about 400 cc) of additive is mixed with 1 kl of oil liquid. Has become.

Therefore, the unit liquid supply amount liquid supply determination means 2 receives the liquid supply amount signal a from the flow meter 3 which measures the liquid supply amount of the shipped oil liquid as described later, and the unit liquid supply amount is supplied. The drive signal b is supplied to the metering pump 4 for additive injection every time.

Then, the metering pump 4 is driven to mix a unit amount of the additive with the oil liquid, the mixing ratio of the oil liquid and the additive is maintained at a constant value, and the blend shipment is performed.

That is, since a fixed amount of the additive is mixed with the oil liquid by using the metering pump 4, the amount of the additive injected is determined by the volume of the metering pump, and the error is small. Since a fixed amount of the additive can be injected accurately, the mixing ratio of the oil liquid and the additive can be maintained accurately.

Further, since the metering pump 4 has not only a pump function but also a function as a flow meter and a function as a metering valve, a mixing ratio setter, a mixing ratio controller, a control valve, a preset counter, etc., which have been conventionally used, are used. Is unnecessary and the configuration can be simplified.

As shown in FIG. 2, the shipping device is configured to ship the oil liquid in the liquid storage tank 6 into the tank 7a of the tank truck 7 via the liquid supply pipe 5.

In the liquid supply pipe 5, the main valve 8 of the liquid storage tank 6, the pump 9,
A strainer 10, a flow meter 3, and a two-stage open / close type metering valve 11 are provided.

A loading arm 12 to be inserted into an insertion port (not shown) of the tank 7a is connected to the tip of the liquid supply pipe 5.

The main valve 8 is opened, for example, from the start time to the end time of the day. In addition, the flow meter 3, the pump 9,
The two-stage open / close type metering valve 11 is connected to the shipping control circuit 1, and the devices are controlled by these at the same time as the shipping operation of the oil liquid as described later.

Reference numeral 13 denotes an operation panel, which is installed near the shipping stage (not shown) on which the loading arm 12 is provided.

On the front face of the operation panel 13, a liquid supply amount setting switch 14 for setting the liquid supply amount of the oil liquid, a normal shipment, that is, a case of shipping without additives and a blend shipment of mixing the additives with the oil liquid. A shipping mode changeover switch 15 for switching and setting the case, a shipping start button 16, and a shipping stop button 17 are provided.

Since each switch of the operation panel 13 is operated as described later in connection with the shipping work, the description of the operation is omitted here.

Reference numeral 18 denotes an additive tank, which is connected to the liquid supply pipe 5 between the flow meter 3 and the metering valve 11 via a branch pipe 19 as a mixed liquid supply pipe which is branched and connected to the liquid supply pipe 5. The reason why the branch pipe 19 is connected to the liquid supply pipe 5 on the downstream side of the flow meter 3 is that the flow meter 3 can accurately measure the flow rate of only the shipped oil liquid.

Further, a metering pump 4 is arranged in the middle of the branch pipe 19, and an opening / closing valve 21 that is opened only for blend shipment is arranged between the metering pump 4 and the liquid supply pipe 5.
That is, the suction side of the metering pump 4 is connected to the additive tank 18, and the discharge side is connected to the liquid supply pipe 5.

The metering pump 4 is operated by a drive signal from the shipping control circuit 1 and has a structure for injecting a fixed amount of additive into the liquid supply pipe 5.

Although the structure of the metering pump 4 is well known, it is not shown, but generally, the piston in the cylinder is slid to suck a certain amount of the additive into the cylinder, and the driving signal is supplied. The piston slides in the direction opposite to that at the time of suction to push out the additive in the cylinder.

Therefore, since the metering pump 4 has a constant injection amount depending on its internal volume, a fixed amount (400 cc in this embodiment) of additive can be accurately mixed with respect to the unit liquid supply amount. .

As described above, since the oil liquid is sent by the pump 9 and the flow rate of the oil liquid to be shipped is switched between the large flow amount and the small flow amount by switching the valve opening of the metering valve 11 in two steps, the inside of the liquid supply pipe 5 The hydraulic pressure is low when the valve opening of the metering valve 11 is large and fully opened, and is high when the valve opening of the metering valve 11 is half-open or half-closed.

Therefore, in order to inject the additive with the metering pump 4 through the branch pipe 19 communicating with the liquid supply pipe 5 on the upstream side of the metering valve 11, the metering valve 11 in which the liquid pressure in the liquid supplying pipe 5 is high is half opened. Alternatively, the liquid pressure in the liquid supply pipe 5 is lower than that in the semi-closed condition.
It is easier to fully open and the load on the metering pump 4 is smaller.

The metering pump 4 not only functions as a pump as described above, but also functions as a flow meter for measuring the injection amount of the additive and further as a metering valve for feeding a fixed amount of the additive. Despite this, it has a compact structure.

Also, the tank 7a of the tank truck 7 is divided into a plurality of hatches (not shown), and the hatch capacity is not necessarily constant, and the amount of liquid that can be loaded is different, for example, 1kl, 2kl, 4kl. There is also.

Therefore, when blending and shipping, the injection amount of the additive must be adjusted according to the liquid supply amount.

Here, in connection with the shipping operation of the oil liquid, FIG.
This will be described with reference to FIG.

Further, the shipping control circuit 1 executes the processing shown in FIGS. 3A and 3B when the tank truck 7 arrives.

First, normal shipping will be described, and then blended shipping will be described.

First, when the empty tank truck 7 arrives at the shipping stage in FIG. 2, the grounding device is connected to the vehicle body, whereby the grounding interlock is released.

Next, the operator inserts the loading arm 12 into the insertion opening of the tank 7a.

In this case, it is assumed that the hatch having the loading arm 12 inserted therein has a capacity of 2 kl.

Subsequently, the operator turns the liquid supply amount setting switch 14 of the operation panel 13 to set "2kl" corresponding to the reservation data.

In FIG. 3A, the shipping control circuit 1 reads in step S1 the type of oil to be shipped to the tank truck 7 and the loading amount n, and sets it.

When the operator switches the shipping mode changeover switch 15 of the operation panel 13 to the normal shipping A and depresses the shipping start button 16, the shipping start button ON is read in step S2, and the presence or absence of additive injection is determined in step S3.

As described above, the shipping mode selector switch 15 is normally shipped A
Since it has been switched to, it is determined in step S3 that no additive has been injected.

Therefore, in step S5, m = S (however, the value of S is equal to or more than the current loading amount, for example, S = 2kl) is set,
Subsequently, a drive signal is output to the pump 9 to activate the pump 9 (step S6).

In the shipping apparatus, the pump 9 is started and at the same time as shown in FIG.
As shown in (B) and (C), the flow meter 3 is in the middle of metering, and further, the first stage valve opening signal is output to the metering valve 11 to open the metering valve 11 in the half open state (step S7).

By half-opening the metering valve 11, the oil liquid in the liquid storage tank 6 is loaded into the tank 7a of the tank truck 7 via the liquid supply pipe 5 and the loading arm 12.

Since the shipping mode switch 15 is set to the normal shipping A, the open / close valve 21 on the branch pipe 19 remains closed.

Therefore, only the oil liquid in the liquid storage tank 6 is supplied to the tank 7a, and the liquid supply amount is measured by the flow meter 3.

In step S8, since the metering valve 11 is of the two-stage open / close type, it is determined whether or not the liquid supply amount Q loaded in the tank 7a reaches d ₁ (in this embodiment, for example, d ₁ = 100l). To check.

In step S8, the time from the start of shipping may be checked instead of the liquid supply amount.

When Q = d _{1 in} step S8, the second stage valve opening signal is output to the metering valve 11 to fully open the metering valve 11 (step S9).

In FIG. 4, it is the time t ₁ from the start of output to the full opening of the metering valve 11.

In step S10, it is determined whether or not m = 0. However, since m = S is set in step S5, the third value is set.
In step S12 shown in FIG. 6B, m = m + 1 is calculated in step S12.

Therefore, in step S12, m = 2 + 1 = 3 is set.

Next, in the liquid supply this time, in step S13, the liquid supply amount Q
Does not satisfy Q> m, the operation of Q = n−d ₂ is executed in step S14. The d ₂ is viewed timing for outputting the first stage valve closing signal, in the present embodiment, for example, d ₂ = 10
Set to 0l.

Therefore, after the metering valve 11 is opened, the oil liquid pumped by the pump 9 is loaded in the tank 7a via the liquid supply pipe 5 and the loading arm 12, and the liquid supply amount is Q = n−d ₂ = 1.
The processing of steps S13 and S14 is repeated until it reaches 9 kl.

When Q = 1.9kl in step S14, the first-stage valve closing signal is output to throttle the metering valve 11 to the semi-closed state (step S1).
Five).

Succeedingly, in a step S16, it is checked whether or not the liquid supply amount Q has reached Q = n−d ₃ . The d ₃ is metered valve 11 from the second stage valve closing signal is output are expected to flow through until fully closed, in the present embodiment and d ₃ = 3l.

Therefore, when Q = 1.997kl is reached in step S16, the second stage valve closing signal is output to fully close the metering valve 11 (step S17).

After the metering valve 11 is fully closed, the pump 9 is stopped with a delay of a predetermined time t ₂ (shown in FIG. 4) in preparation for the start of the next output (step S18).

In this way, a series of normal shipments are completed and the tank 7a
Only 2 kl of oil liquid will be loaded into.

 Next, a case of executing blend shipment will be described.

 The description of the same process as the normal shipment is omitted.

First, the loading arm 12 is inserted into a hatch insertion opening (not shown) different from the above. However, it is also assumed that the tank 7a in which the oil liquid is loaded this time has a hatch capacity of 2 kl.

The operator sets 2 kl with the liquid supply amount setting switch 14 of the operation panel 13 and turns the shipping mode switching switch 15 to switch to the blend shipping B.

As a result, a valve opening signal is output to the opening / closing valve 21 in the middle of the branch pipe 19. Then, when the shipping start button 16 is pressed, the processes of steps S1 to S3 are executed as in the normal shipping.

In step S3, unlike the case of normal shipping, since it is an additive injection agent, step S4 is reached and "m = 0" is set. After that, the processes from step S6 to S9 are executed, the metering valve 11 is half-opened when the pump 9 is started, and then fully opened.

In step S10, it is checked whether or not m = 0. Since m = 0 is set in step S4 this time, the process proceeds to step S11, the drive signal is output to the metering pump 4, and the metering pump 4 is turned on. Activate.

Therefore, as shown in FIGS. 4 (D) and 4 (E), at the same time when the metering valve 11 is fully opened, a driving signal to the metering pump 4 is output, whereby the metering pump 4 operates.

Therefore, the additive in the additive tank 18 is stored in the metering pump 4
Is sucked into the metering pump 4 and a fixed amount (in this embodiment, the supply amount of one time is set to 400 cc) of the additive is supplied through the branch pipe 19 and the opening / closing valve 21 to the liquid supply pipe. 5 is injected.

In this way, the additive is metered and injected into a fixed amount by the substantially constant amount pump 4, and a fixed amount of the additive is mixed with the oil liquid with respect to the unit liquid supply amount of the oil liquid.

Further, since the additive is injected as described above in the process in which the oil liquid is fed through the liquid supply pipe 5 by the pump 9, the additive is loaded into the tank 7a while being mixed with the oil liquid in the pipe. Be done.

Therefore, in the tank 7a, the oil liquid and the additive are uniformly mixed, and the mixing ratio thereof is also accurately kept constant.

After the operation of the metering pump 4, in step S12, m = m + 1,
That is, m = 1 is set.

Therefore, when the 1 kl liquid supply is completed and the 2 kl liquid supply is started, Q ≧ m and the process returns from step S13 to step S11.

That is, the 1 kl oil liquid is loaded in the tank 7a,
At the stage when the loading of the eye oil solution is started, the metering pump 4 is operated again via the delay time t ₁ and returning to step S11.

Therefore, as shown in FIGS. 4 (D) and (E), a fixed amount (400 cc) of additive to the second kl oil liquid is supplied from the branch pipe 19 at time t ₁ after the completion of the ₁ kl liquid supply. It is injected into the liquid pipe 5.

As a result, the oil liquid mixed with the additive is loaded in the tank 7a, as in the case of the 1 kl liquid supply.

In the next step S12, m = m + 1 is calculated, and therefore m = 2 is set.

Therefore, the process proceeds from step S13 to S14, and the liquid supply amount Q = 1.
Steps S13 and S14 are repeated until the value reaches 9 kl.

When the liquid supply amount Q reaches 1.9 kl, the metering valve 11 is half-closed (step S15), and the semi-closed state is maintained until the liquid supply amount Q becomes 1.997 kl (step S16).

In step S16, when the liquid supply amount Q reaches 1.997kl, the metering valve 11 is fully closed (step S17).

In this way, the blend shipment of the oil liquid 2 kl in which a fixed amount of additive is mixed for each unit liquid supply amount is completed. The pump 9 is stopped after time t ₂ from the end of the blending shipment (step S18).

As described above, in order to operate the metering pump 4, it is not necessary to perform troublesome control such as opening and closing the valve device while measuring the flow rate value of the mixed liquid by integrating the pulses from the flow meter, and the predetermined amount of the oil liquid can be obtained. By simply operating the metering pump 4 every time the unit liquid supply amount is measured, the mixing ratio of the oil liquid and the additive is maintained at a constant value, and the blending shipping control can be easily performed.

In the above embodiment, the case where 2 kl of oil liquid is loaded has been described as an example, but the liquid supply amount is 1 kl or 3 kl, 4 kl depending on each hatch capacity of the tank 7a. If the amount is 1 kl, the operation of the metering pump in step S11 is 1
When only 3 kl or 4 kl is set, the metering pump 4 is activated and the additive is automatically injected every time when the unit liquid supply amount is loaded.

Further, in the above embodiment, 1 kl is the unit liquid supply amount,
The value of the unit liquid supply may be a value other than 1 kl.

Also, the number of operation of the metering pump per unit liquid supply amount is
In the above embodiment, the number of times is one, but it may be more than one.

Further, the number of times of operation of the metering pump that reaches the unit liquid supply amount of the oil liquid may be separately set and changed according to the injection ratio of the additive oil liquid for each unit liquid supply amount.

Effects of the Invention As described above, the shipping apparatus according to the present invention has the following features.

Since the additive injection amount is determined by the volume of the metering pump and there is little error, it is possible to accurately inject a fixed amount of additive per unit liquid supply by operating the metering pump, and to mix the oil liquid and the additive. The ratio can be maintained accurately.

By using a metering pump that has not only the pump function but also the function as a flow meter and the function as a metering valve, the previously used mixing ratio setting device, mixing ratio controller, control valve or preset counter etc. are unnecessary. Therefore, the configuration can be simplified.

When mixing and mixing an oil solution with a mixed solution such as an additive, the injection amount of the mixed solution can be controlled by the number of times of operation of the metering pump. It is possible to accurately mix a fixed amount of the mixed liquid with the oil liquid with respect to the liquid supply amount of.

To operate the metering pump, it is not necessary to perform troublesome control such as opening and closing the valve device while measuring the flow rate value of the mixed liquid by integrating the pulses from the flow meter, and the predetermined unit liquid supply amount of the oil liquid. Since the metering pump is only activated each time is measured, control can be performed easily.

When refurbishing the existing equipment that can feed only one type of oil liquid to a blend shipping system that can mix mixed liquids such as additives, install a mixed liquid supply pipe and install a metering pump in this mixed liquid supply pipe. Since it may be provided, the construction can be performed relatively easily.

Inject the mixed liquid when the flow rate of the liquid is small, that is, when the pressure in the liquid supply line piping is lower than when the metering valve is half-opened or half-closed, that is, when the metering valve is fully open and the liquid flow rate is large. Therefore, the load on the metering pump is small,
It is easy to inject the mixed liquid into the liquid supply path.

When the metering valve is fully opened and the liquid flow rate is high,
The flow of the liquid promotes agitation in the liquid supply passage, and the mixed liquid and the liquid can be uniformly blended.

If the metering pump operates at a small flow rate when the metering valve is closed halfway when the metering is completed, the mixed solution may remain in the metering path when the metering valve is fully closed. However, by mixing the mixed solution into the liquid supply path while the metering valve is fully opened and at a high flow rate, the metering valve is semi-closed even after the final mixing at the shipment The mixed solution is pushed out and does not remain in the pipe.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of a shipping apparatus according to the present invention. FIG. 2 is a schematic configuration diagram of an embodiment of the shipping apparatus. FIGS. 3A and 3B are flowcharts for explaining the processing executed by the shipping control circuit. FIG. 4 is a time chart showing the operation of the metering pump in connection with the shipping work. 1 ... Shipping control circuit, 2 ... Unit liquid supply amount liquid supply determination means,
3 ... Flowmeter, 4 ... Metering pump, 5 ... Liquid supply pipe, 6
…… Liquid storage tank, 7 …… tank truck, 9 …… pump, 11 …… metering valve, 12 …… loading arm, 13 ……
Control panel, 15 ... shipping mode selector switch, 18 ... additive tank, 19 ... branch piping.

Claims (1)

[Scope of utility model registration request] 1. A metering valve for switching the flow rate of a liquid between a small flow rate and a large flow rate by switching the valve opening degree in two stages.
Through a liquid supply passage provided with a flow meter, the valve opening of the metering valve is fully closed, half open, fully open, half closed, so that the flow rate of the liquid is small, large, and small. In a shipping device that controls shipping in a closed state, the suction side communicates with a mixed solution tank that stores a mixed solution to be mixed with the liquid, and the discharge side is located upstream of the position where the metering valve of the liquid supply path is provided. A mixed liquid supply pipe communicating with the side, a fixed amount pump provided in the mixed liquid supply pipe and discharging a predetermined amount of the mixed liquid to the liquid supply passage per operation, and when the flow rate of the liquid is large 2. A shipping device, comprising: a liquid mixture control unit that operates the metering pump a preset number of times each time a predetermined unit liquid supply amount of the liquid is measured by the flow meter.