JPH01320398A - Filling method for liquefied gas - Google Patents

Abstract

PURPOSE:To realize a high accuracy and to better workability by weighing the weight by placing the container to be filled on a weighing scale and executing a filling work by setting an aiming filling quantity by utilizing the code data of this container. CONSTITUTION:The weight of the container 5 to be filled is weighed by placing it on a weighing base 4 and the aiming filling quantity for filling the liquefied gas of a rated filling quantity to the container is set by reading with a reading device 20 and discriminating medium 19 recorded with the code data on this container by being fitted to this container 5 to be filled. After performing the filling work of the liquefied gas in the aiming filling quantity the inspection of the under and over filling quantity is executed by finding the difference in the target value of the filling quantity and the actual weighing value in the weighing base 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquefied gas filling method for filling a container such as a cylinder with liquefied gas such as LP gas.

Prior art The fI1 mechanical filling machine, (
(2) Flow meter type filling machine (110 electronic type filling machine is common).

The above-mentioned mechanical filling machine attempts to control the filling amount by placing the container on a measuring device such as a platform scale and measuring both the weight of the container and the weight of the liquefied gas filled into the container. It is something to do.

A flow meter type filling machine attempts to control the filling amount of liquefied gas based on its flow rate.

An electronic filling machine uses an electronic weighing device such as a load cell instead of a platform scale in a mechanical filling machine.

Problems to be Solved by the Invention However, the above-mentioned conventional mechanical filling machines have a disadvantage in that many manual operations are required. In addition, in a flowmeter-type filling machine, the M-pointer measures the remaining logs in the container and checks whether the filling amount is over or under when filling is completed, and the flowmeter controls the filling amount during filling. However, since the filling process is performed using a conventional method, there is a drawback that the filling accuracy is poor.

An electronic filling machine can eliminate the drawbacks of such mechanical or flow meter type filling machines.

However, even when this electronic filling machine is used, during actual filling, the felled gas in the container is weighed using a weighing machine, and then the container is placed on the filling machine and the filling operation is carried out. After filling, the container must be transferred from the full container filling machine to another weighing machine and checked for excess or deficiency in the amount filled.
Extremely poor workability. Furthermore, if there is an excess or deficiency in the amount of filling, especially if there is a shortage, the container must be placed on the filling machine and refilled.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve these problems, to provide high accuracy and good workability, and to enable easy refilling even if there is an excess or deficiency in the amount of filling.

Means for Solving the Problems In order to achieve the above object, the present invention provides a device that measures the weight of a container to be filled by placing it on a weighing platform, and records code data about the container by being attached to the container to be filled. Read the identification medium with a reading device,
After setting the target filling amount for filling this container with the rated filling amount of liquefied gas and filling the target filling amount with the liquefied gas, the target value of the filling amount and the actual measured value on the weighbridge are compared. The difference is determined to check whether the filling amount is excessive or insufficient.

Further, according to the present invention, when the reading of the unique % data corresponding to the code data of the identification medium is completed, this reading completion state is displayed, and the filling start switch is manually operated in response to this display. , filling of the container to be filled with liquefied gas can be started for the first time.

Further, filling of the container to be filled with liquefied gas can be started only when the amount displayed on the weighing machine provided on the weighing platform changes to a preset value or more.

According to the present invention, when overfilling is detected by checking whether the filling amount is overfilling or underfilling, an overfilling alarm is issued, and when underfilling is detected, by re-operating the filling start switch. The shortage i is additionally filled.

According to the present invention, operations such as weighing the raft gas, filling the container, and inspecting whether the amount of filling is excessive or insufficient are performed while the container is placed on one weighing stand. In addition, when the filling start switch is operated according to manual p1 in response to the display indicating that the reading of the unique data of the container is complete, the amount displayed from the weighing platform changes by more than the set value and the container actually reaches the weighing platform. Filling starts only when it is confirmed that the device is placed on top of the device, which prevents erroneous operations from occurring.

If the amount of filling in the container is insufficient, simply by operating the filling start switch again, refilling will be performed in the same position without unloading the container from the filling machine. Furthermore, since the data recorded on the identification medium attached to the container is read by a reading device, no manual settings are required.

Embodiment FIG. 1 schematically shows an example of a filling installation according to the invention. Here, 1 is a filling site, and a liquefied gas filling machine 2 shown in FIGS. 1 to 3 is provided at this filling site. This liquefied gas filling machine 2 has an explosion-proof structure including a main body 3 and a weighing platform 4, and a container to be filled 5 is placed on the weighing platform 4.
is now available to be posted. The main body part 3 is provided with an operating spring /L/6, and the operating spring /1/6 is provided with a display part 71, an algebraic keyboard 8, a display buzzer 9, and the like. The numeric keyboard 8 is provided with a filling start switch 10 composed of a push button switch. The main body part 3 is provided with a CPU 11 for controlling the operation of the liquefied gas filling machine 2, and this CPU 11 is connected to each device of the operation spring/I/6.

The weighing platform 4 has a built-in load cell (not shown), and this load cell 7p is connected to the CPU 11.

A liquefied gas hose 12 is led to the main body 3, and this hose 12 is provided with a filling pulp 13 that is opened and closed by a control signal from the CPU 11. A connector 14 is provided at the tip of the hose 12 and is detachable from the pulp portion of the container 5. When the connector 14 is removed from the container 5, it is attached to a columnar support 15 provided on the weighing platform 4.
It is supported by being hooked to.

Office 1 located far from the dangerous filling site 1
A host computer 17 connected to the CPU 11 is provided inside the filling machine 6 to collectively control the plurality of filling machines 2 at the filling site 1.

A registration file /L/18 is connected to the host computer 17, and this registration file /I/18 contains information such as container numbers, filling deadlines, tare weights, rated filling weights, and permissible filling errors for a large number of containers 5. Unique data is recorded for each.

A barcode league 9 is attached to the container 5 as an identification medium in which the ID code of the container 5 is recorded. A barcode reader 20 is provided near the filling machine 2 as a device for reading the ID code recorded on the barcode label p19. This barcode League 20Fi
, are connected to the host computer 17 so as to send the read ID code to the host computer 17.

Next, the operation of filling the container 5 with liquefied gas will be explained.

Once the container 5 has been delivered to the filling site 1, the filling operation is started as shown in step 31 of FIG. 4 (al).

First, in step 32, the container 5' is
f! r: Place it on the weighing stand 4 of the filling machine 2.

Then, in step 33, the barcode label 19 of the container 5 is
The ID code is read by scanning with the barcode reader 20. The ID code of the container 5 is sent to the host computer 17 in step 34. The host computer 17 receives the sent ID code, searches for the registration file 1B in step 35, and
The unique data of the container 5 corresponding to this ID code is read. The read data is sent to the filling machine 2 in step 36.
0 CPU 11, which reads this data in step 37.

Next, check and register file 18 regarding container 5.
A check is made on the read data from the .

First, in step 38, it is determined whether the container 5 is within its filling period. If the time limit has expired, the process moves to step 39 in FIG. , the work is completed at ST27'71.

If it is determined in step 38 of FIG. 4(a) that the filling deadline has not expired, in step 41, the tare weight value read from the host computer 17 to the CPU 11 is determined to be within the filling period for the type of container 5. Determine whether it is within the allowable range. If it is outside the allowable range, it is determined that there is a headquarters in the read data, and step 3 in Figure 4 (d) is performed.
Proceed to 9. If it is within the allowable range, the container 5 is removed from the weighing platform 4 in step 42.

The protrusion' [lf Read the weight value. and in step 43.

The tare weight value whose validity was determined in step 41 is subtracted from this actual weight value to calculate the weight value of the cut gas remaining in the container 5. The calculation results are sent to the host computer 7 at every step. host) 7 computer 7
C. In step 45, all of this value is received and recorded in the registration file 1v18.

In step 46, it is determined whether or not the gas weight value is normal. For example, it is actually impossible for the gas weight value to become a negative value or for this value to exceed the rated filling amount of the container 5, so when such an abnormal value is obtained, Proceed to step 39 in FIG. 4 (cl).

If the gas weight value is normal, the rated filling amount and tare weight of the container 5 are added together in step 47 to calculate the target filling amount.

At this point, processing of the read data is complete, so
In step 48, the display buzzer 9 is activated to display this completion state to all workers. Based on this display,
In step 49, the operator manually operates the filling start switch 10f on the number keyboard 8.

Next, in step 50, it is determined whether the container 5 is actually placed on the weighing platform 4 of the filling machine 1.

This is determined by whether the displayed amount from the weighing platform 4 has changed beyond a preset value, that is, whether the displayed amount has changed by, for example, five scales of the single minimum scale. If there is no such change in the display amount, the process advances to step 39. Step 50 can be omitted since a similar check is made at step 46 if the CPU II and all other systems are normal. However, it makes sense to check the container just before the start to be safer.

Once it is confirmed that the container 5 is placed on the weighing platform 4,
In step 51, the filling valve 13 is automatically opened and filling of the container 5 with liquefied gas is started. Step 5
2, filling is performed until the weighing data from the weighing platform 4 reaches the previously determined target filling amount. When the target filling amount is reached, the filling pulp 13 is automatically closed in step 53.

Next, in step 54, the amount of excess or deficiency in filling is calculated from the difference between the measured value after closing the filling pulp 13 and the previous target filling amount value. If it is determined in step 55 that the amount exceeds the allowable value, the process proceeds to step 39. When it is determined in step 56 that the filling amount is insufficient, although it is not an overfilling amount.

In step 57, an alarm to that effect is sent by the display buzzer 9, etc.
If unevenness occurs, proceed to step 49. By operating the filling start switch 10 again in step 49, only the insufficient amount is additionally filled in the same procedure as above.

If there is no excess or deficiency in the amount of filling, the current filling amount value is sent to the host computer 17 in the step group. Host computer 17 receives the value in step 59 and records it in registration file/I/18.

Next, in step 60, the buzzer 9 indicates the completion state of the filling operation.
The pronunciation of ``V'' is displayed. In accordance with this display, the filled container 5 is unloaded from the weighing platform 4 in step 61 and carried out of the filling site 1, thereby completing the work in step 62.

Effects of the Invention As described above, according to the present invention, the operations from measuring the raft gas to filling the container and inspecting the amount of filling for excess or deficiency can be carried out in an integrated manner while the container is placed on a single weighing platform. Therefore, the workability can be improved. Furthermore, since the ID code of the identification medium attached to the container is read by the reader, it is possible to reduce human work and perform filling work with high precision.

In addition, when the filling start switch is manually operated in response to the indication that the reading of the unique data of the container is completed, the amount displayed from the weighing platform changes beyond the set value, and the container is actually placed on the weighing platform. Filling starts only when it is confirmed that the gas is loaded, which prevents gas leaks due to operational errors.

Furthermore, if the filling amount is insufficient, simply by operating the filling start switch again, refilling can be performed in the same position without unloading the container from the filling machine.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an example of liquefied gas filling equipment based on the present invention, Fig. 2 is a front view of the liquefied gas filling machine in Fig. 1, Fig. 3 is a right side view of the same liquefied gas filling machine, and Fig. Figure (at
(cl is a flowchart of an embodiment of the liquefied gas filling method based on the present invention. 2... Liquefied gas filling machine, 4... Weighing stand, 5... Filling capacity gauge, 10.・・Filling start switch, 17・
...Host computer, 19... Barcode label (a separate medium), 20... Barcode reader (reading device). Agent Yoshihiro Morimoto Figure 2 Figure 3

Claims (1)

[Claims] 1. When filling the container with liquefied gas using a liquefied gas filling machine equipped with a weighing stand on which the container to be filled can be placed and the weight of the container can be measured, At the same time, the container is placed on a weighing platform and its weight is measured, and the reading device reads the identification medium attached to the container to be filled and records the code data about this container, and the container is filled with the rated filling amount of liquefied gas. After setting the target filling amount for liquefied gas and filling the target filling amount with liquefied gas, check whether the filling amount is over or under by determining the difference between the target filling amount and the actual measured value on the weighing platform. A liquefied gas filling method characterized by performing the following steps. 2. When the reading of the unique data corresponding to the code data of the identification medium is completed, this reading completion status is displayed, and the filling start switch is manually operated in response to this display, and then the liquefaction is performed in the container to be filled. 2. The liquefied gas filling method according to claim 1, further comprising starting gas filling. 3. A claim further characterized in that the filling of the liquefied gas into the container to be filled is started only when the amount displayed on the weighing machine provided on the weighing platform changes to a preset value or more. 2. The liquefied gas filling method according to 2. 4. If overfilling is detected through inspection of the filling amount, an overfill alarm will be issued. If underfilling is detected, the underfilling will be canceled by re-operating the filling start switch. 3. The liquefied gas filling method according to claim 2, further comprising additionally filling the liquefied gas.