JP6887668B2 - Impact type powder flow meter - Google Patents

Description

The present invention relates to an impact powder flow meter, and more particularly to a calibration operation during the process of the impact powder flow meter.

As shown in FIG. 1, today's impact type powder flowmeter is a powder discharged from a powder feeder 1 installed in the lower part of a powder storage tank 3 arranged at a predetermined drop height H. The horizontal component force 6 of the impact load 5 generated when the body 2 naturally falls in the rectifying device 14 and collides with the detection plate 4 obliquely provided on the transmitter of the flow meter is proportional to the flow rate of the powder 2. The principle is used. Therefore, in order for the receiver 17 of the flow meter to display the actual flow rate of the powder 2, the above proportional coefficient (flow coefficient) is obtained by the calibration operation shown below. Further, it is necessary to manually adjust and introduce the coefficient into the receiver 17.

Therefore, normally, as shown in FIG. 1, the powder 2 passed through the detection plate 4 of the transmitter is subjected to a measurement time T of about 1 to 5 minutes for a predetermined time, and a damper 18 (in FIG. 1, the opening / closing gate). Is sampled, stored in the container 7, weighs the weight W of the stored powder 2, and the actual flow rate (W / T = S) of the stored powder 2 is calculated to obtain the horizontal component. The actual flow rate S with respect to the force 6 is obtained. On the other hand, at the same time, the span of the receiver 17 is manually adjusted so that the indicated flow rate St of the powder 2 displayed on the receiver 17 is the same. If necessary, the above-mentioned actual flow rate check is repeated several times to obtain the average value, and the span is adjusted. Normally, this operation is performed in a flow rate range such as maximum, normal, or minimum flow rate of the powder 2. With the above, the manual flow rate check is completed. In this case, in order to store the powder 2 in the container 7, it is necessary to take the powder 2 out of the service. As a result, work man-hours are generated. Further, normally, the powder 2 flows down in the rectifier 14, the flow path 15, and the check gate 21 and is isolated from the outside of the rectifier, but in order to perform the above sampling, the powder 2 is used. It will be necessary to take it out of the check gate 21. In that case, when the powder 2 is a fine powder such as carbon black, a particularly large amount of dust is generated, and the dust generation pollutes the environment and at the same time causes a problem of dust explosion. Further, when the flow meter has a large size of, for example, about 300 t / h, the weight of the powder 2 by sampling for 1 minute becomes a maximum of 5 tons, and the container 7 becomes several dump trucks. When sampling for several minutes, it is necessary to increase the number of tracks. As a result, various expenses become high and the work man-hours increase. The receiver 17 is connected to the impact type powder flow meter by a conducting wire 18.

In order to improve this, the method of FIG. 2 has been put into practical use. That is, the check bin 10 supported by the load cell total 11, the discharge feeder 12 and the transfer device 13 are provided between the powder feeder 1 and the rectifier 14, and the calibration operation is automated. That is, the discharge operation of the discharge supply machine 12 is stopped, and the load cell total 11 receives that the powder 2 discharged via the storage tank 3 and the powder supply machine 1 is stored in the check bin 10 in a predetermined amount. 17 confirms and stops the operation of the powder feeder 1. At the same time as the calibration operation is started, the discharge feeder 12 starts the discharge operation. After the measurement time T elapses, the operation of the discharge supply device 12 is stopped, and the receiver 17 calculates the actual flow rate S of the discharged powder 2 via the load cell total 11. At the same time, the receiver 17 compares the indicated flow rate St displayed by the receiver 17 with the actual flow rate S, and automatically adjusts the flow coefficient by automatically adjusting the span of the receiver 17 so that both values are the same. In this case, practically, the check bin 10 needs to have a capacity to store the powder 2 or more discharged for several minutes, and an installation space for that purpose is required. As a result, there is a problem of an increase in equipment cost and an increase in capital investment cost due to an increase in the size of the building to be stored. At the same time, various problems occur, such as interruption of the work man-hours required for the above one process. In addition, this calibration operation can be used to check and improve the accuracy of the flow coefficient during process operation, but the interruption time of process operation is several minutes and the sampled powder. It often happens that the amount of 2 is too large to be discharged during the process, which causes a problem in the process and cannot be applied.

Japanese Patent No. 3750125 Japanese Unexamined Patent Publication No. 2016-200468

The present invention eliminates the drawbacks in the prior art, installs the flow meter in the process, and then confirms and sets the flow coefficient at the start of operation, and confirms and corrects the flow coefficient during operation, and the accuracy of the result. To provide an impact powder flow meter that can automatically adjust the calibration operation for improvement.

Further, in the present invention, it is necessary to completely automate the conventional procedure, reduce the installation space and equipment cost, and further take out the powder from the process line without increasing the sampling cost and the work man-hours. It is an object of the present invention to provide an impact type powder flow meter capable of automatically matching the displayed flow rate and the actual flow rate and improving the measurement accuracy of the flow rate without environmental pollution due to the generated dust.

In order to solve the above-mentioned problems, the present invention provides an impact type powder flow meter by providing a weight measuring tank at the lower part or the upper part of the impact type powder flow meter via a flexible joint, and at the discharge port of the heavy tank. Stop the discharge operation of the arranged open / close gate or the discharge supply machine of the discharge supply machine, measure the weight change of the metering tank within the specified time, calculate the actual flow rate using the specified time, and receive the receiver. It is characterized by using the built-in software to automatically match the displayed flow rate with the actual flow rate.

Further, according to the present invention, in the impact type powder flow meter, in the impact type powder flow meter, a weight measuring tank is provided at the lower part or the upper part of the impact type powder flow meter via a flexible joint, and the discharge port of the heavy tank is provided. The actual flow rate S is calculated by stopping the discharge operation of the open / close gate or the discharge supply machine of the discharge supply machine arranged in the above and differentiating the temporal increasing tendency of the metering tank 19 within a predetermined time, and at the same time. It is characterized in that the indicated flow rate St of the receiver 17 is automatically matched with the actual flow rate S by the software built in the receiver 17.

Further, the present invention is characterized in that, in the above two impact type powder flowmeters, the impact type powder flowmeter can be connected to the IoT system and the calibration operation can be performed from a remote location.

According to the present invention, in the impact type powder flow meter, the calibration operation can be automatically adjusted at the start time when the operation of the process is started and for the confirmation / setting of the flow coefficient or the confirmation and improvement of the accuracy during the operation of the process.

According to the present invention, in the impact type powder flow meter, the display flow rate and the actual flow rate are automatically set with the same number of processes as before, the installation space and equipment cost are small, and the sampling costs and work man-hours are not increased. It is possible to match the measurement of the flow rate with the substance and improve the measurement accuracy.

According to the present invention, in these impact type powder flowmeters, the impact type powder flowmeter can be connected to the IoT system and the calibration operation can be performed from a remote location.

It is a schematic longitudinal section showing a prior art impact powder flowmeter that manually adjusts the calibration operation. It is a schematic vertical section showing a prior art impact type powder flow meter that automatically adjusts the calibration operation. It is a schematic vertical section showing the impact type powder flow meter of the present invention which automatically adjusts a flow coefficient by a calibration operation. It is a schematic vertical section showing the impact type powder flow meter of the present invention in which the metering tank is arranged in the upper part of the flow path. It is a schematic vertical section showing the impact type powder flow meter of the present invention equipped with a plurality of rotation detection plates.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 5.

In the impact type powder flow meter of the present invention of FIG. 3, the flow coefficient is automatically adjusted as follows. The weighing tank 19 held by the load cell total 11 is installed via the flexible joint 16 arranged at the lower part of the flow path 15. An openable gate 18 is installed below the gate. Due to the start signal of the receiver 17, the opening / closing gate 18 stops the discharging operation, and the weight of the weight tank 19 is displayed to the receiver 17 from moment to moment via the load cell meter 11. The following calculation software is stored in the receiver 17.

The receiver 17 confirms 1) the weight change of the load cell total 11 within a predetermined time, for example, 10 seconds, and 2) the indicated weight change of the totalizer 9 within the predetermined time, and sets a span so that both weight changes match. Adjust automatically.

Alternatively, the actual flow rate S of the powder 2 is confirmed by differentiating the temporal increasing tendency of the indicated value of the load cell total 11 within a predetermined time by the software built in the receiver 17, and at the same time, the indicated flow rate St of the receiver 17 Is automatically confirmed, and the span of the receiver 17 is automatically adjusted so that both flow rate values are the same. Here, the totalizer 9 can become an indicator of the indicated flow rate St by automatic switching.

If the flow rate of the powder 2 does not pulsate, the upper predetermined time can be set to about several seconds at the shortest. When the flow rate of the powder 2 pulsates, the time corresponds to the shortest number of pulsations, but in practice, the time varies depending on the discharge characteristics of the discharge supply device 12.

Further, as shown in FIG. 4, the weighing tank 19 can be arranged in the upper part of the flow path 15. In this case, the actual flow rate of the powder 2 depends on the discharge supply machine 12 arranged in the lower part of the weighing tank 19.

The present invention is equipped with a conventional impact type powder flow meter equipped with a single detection plate, and a detection plate composed of a plurality of slanted plates corresponding to Japanese Patent Application Laid-Open No. 2016-200468. Various impact type powder flow meters such as an impact type powder flow meter equipped with a multi-plate type detection plate and an impact type powder flow meter applicable to adhesive powder equipped with a plurality of rotation detection plates 20 shown in FIG. Applicable to total.

The impact type powder flow meter of the present invention can be used for measuring the flow rate of a slurry instead of the powder 2.

Further, the impact type powder flow meter of the present invention is connected to the IoT system, and is utilized for performing the calibration of the flow meter by remote control and confirming the abnormality of the flow coefficient from a remote place, and is related to the IoT system. It is possible to promote rationalization, equipment improvement and abnormality management, or maintenance work.

1. 1. .. .. .. Feeder 2. .. .. .. Powder 3. .. .. .. Storage tank 4. .. .. .. Detection plate 5. .. .. .. Impact load 6. .. .. .. Horizontal component force 7. .. .. .. Container 8. .. .. .. Conductor 9. .. .. .. Accumulator 10. .. .. .. Check bin 11. .. .. .. Load cell total 12. .. .. .. Emission supply machine 13. .. .. .. Transfer device 14. .. .. .. Rectifier 15. .. .. .. Channel 16. .. .. .. Flexible joint 17. .. .. .. Receiver 18. .. .. .. Damper or retractable gate 19. .. .. .. Weighing tank 20. .. .. .. Rotation detection plate 21. .. .. .. Checkgate

Claims (4)

A weight gauge tank 19 is provided at the bottom or top of the impact type powder flow meter via a flexible joint 16 to stop the discharge operation of the open / close gate 18 or the discharge feeder 12 arranged at the discharge port of the weight gauge tank 19. Then, the weight change of the metering tank 19 within the predetermined time is measured, the actual flow rate S is calculated using the predetermined time, the software built in the receiver 17 is used, and the display flow rate St is automatically set to the actual flow rate S. Impact type powder flow meter characterized by matching the target. A weight gauge tank 19 is provided at the bottom or top of the impact type powder flow meter via a flexible joint 16 to stop the discharge operation of the open / close gate 18 or the discharge feeder 12 arranged at the discharge port of the weight gauge tank 19. Then, the actual flow rate S is calculated by differentiating the tendency of the metering tank 19 to increase with time within a predetermined time, and at the same time, the indicated flow rate St of the receiver 17 is automatically set by the software built in the receiver 17. An impact type powder flow meter characterized by matching with the actual flow rate S. The impact type powder flow meter according to claim 1, wherein the impact type powder flow meter is connected to an IoT system and a calibration operation can be performed from a remote location. The impact type powder flow meter according to claim 2, wherein the impact type powder flow meter is connected to an IoT system and a calibration operation can be performed from a remote location.

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