JPS5949614A - Flow rate controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] Regarding improvements.

[Technical background of the invention and its problems]

Conventionally, heavy water, light oil, etc. were transferred from a stone-faced refinery to the tank of a tanker or tank lorry, or beer or chemicals were controlled to determine which liquid was being used for preparation; The device is in use.

Figure 1 is a diagram showing a system for pumping heavy oil from a stone tanker to a tanker using a flow control device. Oil refining that failed to be discharged due to Nzono, L field evening/return 2 Q) Lj Ura's IIA degree and heavy oil〆Ififj were measured with temperature 1 noy correction l, 14 resistance 1.
) ζ3 and hip-hin'/Af, ! +: total, volumetric flow 'I
:dl' jC and sys transmission type flowmeters 4, and these measurement signals are introduced into the control device 10 as a flow 6. This flow [1 control device 10 suddenly opens the operating valve 5 based on the flow 1 heat 1 signal 1j measured by the flow controller 14 to supply the flow to the tank of the tanker 6, and also Judging from the flow 4 signal and time that the /ll+ has reached the predetermined flow 1" 1, and opening and closing the operation valve 5 suddenly but more than 1, the flow Sudden changes cause the water hammer phenomenon. Therefore, conventionally, in order to eliminate this phenomenon, a flow melting control device 10 as shown in FIG. 2 has been used. That is, the flow I control of this device is as follows.

1 (I of the storage unit 11 made up of OM and RAM divided by 1?4)
The nologram stored in t OM and Figure 3 ((2)
'till Orchid's arm's occurrence r: +s J
At the timing of 11. First, flow! a control device 1
When the 74 power source is turned on to 0, the central processing unit (hereinafter abbreviated as CPU) 13 operates according to the program in the ROM. As a result, the operation valve 5 is opened and heavy oil is sent into the tank 6. The flow 14 counter 14 counts all 8i pulse signals (the pulse signals shown in FIG. 3(b)) from the flow meter 4 and sends them to 1L AM of the storage unit 11 via the path 15.
to be CI) TJ J 3 Sea 3 It A M Same memorized flow: 1.1 Calculate the flow being sent to the tank 6 from the tl value. Further, the CPU 13 calculates and obtains the flow tIiq sent to the tank 6 and accumulated.

This accumulated flow is determined by the difference QJ-Qw between 11Q and the target flow i1j QI of tank 6, and this difference Qz-Q
Based on the value of , an operation signal by PI sub-control is sent to the 11-A converter 16 via the path 15 based on the norogram. This operation signal is converted into an analog signal by the I)A converter 16 and sent to the operation valve 5. This allows the degree of opening and closing of the operating valve 5 to be adjusted. At the same time, the temperature of the fluid is detected by the temperature measuring resistor 443, converted into temperature by the temperature measuring section 17, converted into a digital signal by the A-D converter 18, and stored in 11A^1 via the node 15. be done. This determines whether 1fli'1 degree of the %CPIJzs fluid is constant fc. The operation is performed as described above, and the flow f11 is controlled. The pattern of this flow 111 control is carried out as shown in FIG. 3 (11).

11. iAE i+'t starting at 1IAI on day 1 is increased by 1ifj lIj at a predetermined increment rate and sent to 'C tank 6. When this flow 11 becomes ql, the two-limit current becomes 1itl.
, I”-current limiting 1. (The constant flow 1 of q I is sent to the evening/dawn 6. Then, the accumulated flow @Q of the tank 6 becomes the target flow I
It is set in advance according to QJ! Repatch style-1Q
When P is reached.

The flow F4+ is sent to the tank 6 through the flow port at a predetermined reduction rate until it reaches the lower limit flow 1 point 92. When the flow 9 reaches the lower limit flow IJq2, the urameter is sent to the tank 6 at a constant flow rate of the lower limit flow IJq2. As a result, the CPU 7 J can calculate that the accumulation flow gutter Q of the tank 6 has reached the target: AFII Q 1.

The CPU 7J outputs an operation output to fully close the 1ψ operating valve 5 at the control timing when the target flow lQ1 is exceeded.
Stop flow 1.1.

Therefore, the predetermined period T is as long as 1 second.
Even if the operating valve 5 is fully closed, the flow error ΔQ7
a- It can occur. For example, for a flow port of 0.11, l z'? Using a flow meter that generates a pulse, the lower limit current meter q) is set to 17 per second, and the flow rate is 5001! ``When sending oil to tank 6, if the predetermined cycle 1'' is 1 second, 501
! ! '& there is a risk of sending it to tank 6. Therefore, 0. l1
If you want to send heavy oil to tank 6 with an error within
．． This would result in over 12.

[Purpose of the invention]

The present invention has been made in view of the above circumstances.

i1i'l I'1LI1Accumulation flow 1 even if the group is long
, 1 reaches 1g"4 l, jr > - to be myself.

[Summary of the invention]

The present invention calculates the iH number of the signal from the 1jtl'fi meter, and calculates the flow rate from this (i'lj& value) by the central processing unit.
The stationary flow F[i
In the device that sends the tNN source 111 of the container, the tNN source flow 111 is a
i fit I:I ``When I hit, I set a goal in advance!
l: Calculate the difference between the target flow and the accumulated flow, and when the target flow and the accumulated flow are equal to t, send an interrupt signal to the central processing unit and fully close the operating valve. The aim is to achieve the above objectives.

[Fruits of the Invention] Example J1a] Figure 4 is a block diagram showing an embodiment of the flow rat control device according to the present invention. Components that are the same as those of the conventional device are given the same reference numerals and detailed explanations are omitted. In this device, compared to Fig. 2, especially 5! This is because the preset counter 20 is provided. This preset counter 20 indicates the flow and amount of fluid sent to the tank 6 of the tanker.
When it reached 2, the boat, Megiri F, tQ and tank 6 internal flow J
Preset the difference Q1-Q with %4Q, and set this difference 0z
When -Q reaches the koto by sending the current 44, an interrupt signal is sent to the central processing unit 13 and the operation valve 5 is closed.

Next, we will explain the construction of a device that was applied to an 11" 1-go tanker for transporting heavy oil from the Ishiura Kozue factory to the tanker.

First, the amount of heavy oil accumulated in tank 6 is preset 1x.
Until reaching l+1i position Q2, the flow rate control is performed in the same way as in the conventional case. In other words, when oil is input to the diversion control device 10, the CPU 1.9 reads the instructions from the stored program and gradually opens the operating valve 5. Song ``1 Blue Battle So'' [1 Easy Tank 2
/ Sent to tank 6 of the Hara tanker. 1''l of this heavy oil is controlled when a pulse is generated at a predetermined opening 'r from the pulse generator 12 as shown in FIG. ,'
+1 in total! I L, as No. 9 Rus 1 Ba shown in No. 31'2j (1))? ! l↑1; Send to 1 counter 14. The flow 111 counter 14 counts this relay signal t41 and sends the n1 value to the RAM of the -C storage unit 1 via the node 15.

Sokote CPII J s let, RAM D 1
':llF Calculate the subtracted count value and find the repair order. Furthermore, CI' 11r :Hj,.

of the 111 oil accumulated in tank 6 (11Q/l,!i
What is the goal of this accumulated flow? kt1
-1 (J Difference from l Q 7- Q Calculated by hard performance; ', + 07・-Q's i1.' (to -11
According to the 15-piece zologram) 'C''：li'l
1111 and sends the signal a to -(-J')-A conversion jlu, 6 via path 15. and is sent to the operating valve 5. As a result, the valve opening degree of the operating valve 5 is adjusted to 1X' and '11.

Heavy oil flow 1,1 control is performed. To be more specific about this ``Control 1'', we will start pumping out heavy oil +) 7
Iit,Lttl;J,, it is increased by a predetermined increment amount and sent to the tank 6. 〆rf +: i is upper limit 2it'!
When it reaches q 7.

The flow is 1i1qJ, and it is sent to tank 6 with a lie. And the target flow of heavy oil in tank 6 fii
Q According to l-C Nori patch t set in advance
When it reaches P, the flow ψ decreases at a predetermined rate of decrease and is sent to the tank 6.Then.

When the flow 1 reaches the lower limit flow rate q2, that tAjtJ\ is sent to the tank 6 while maintaining q2.

As a result, the EA Q of the tank 411 of the tank 6 is within the reset range Lt Q 2 (For example, if the target iH # Q l is set to e500 on the flow rate counter J4, the storage of 1 bar + Lt 6t Q is 480 to 490 counts) It is reached. At this time, the CPU 13 calculates the difference between the line-of-sight flow μQ1 and the 11Q of the tank 6, ! I-Q'f: Obtained by calculation, Knee! Kara of at-q: / l-number'
1 value is added to the preset counter 20. f reset force 6 y 3' 201J ii "ia off
' ・Nrus signal from 4 (+-total 1: k L pre-[
Decrease the number of counted wolves that have been counted. Then, when the count reaches zero, that is, when the j3Q of the heavy oil in the tank 6 reaches the target 14j17 (Q1), the reset counter 20 sends an interrupt signal to the CL'U13. From this, the CPU 73 sends a signal to close the operation valve 5f to the J)-A converter 16 via the path 15.Then, this signal transmits 1)-A conversion 'S161'' from the knee -rs11/) (f- is sent to the operating valve 5. The operating valve 5 is thereby closed.

Therefore, the rljQ of heavy oil in tank 6 is line-of-sight flow 111Q
), CPUJ
Since an interrupt signal is sent to J, the sweep valve 5 is immediately closed, and the flow 11 to the tank 6 is stopped. L+'tQ of heavy oil to be sent to is sent by the target flow uQz, and lr does not occur so that it is sent more by the flow UΔQ until Xr reaches the control timing.

In addition, this 7Ai IJ and control unloading device 10 can be used not only when pumping heavy oil into the tank 6, but also when transporting light oil, beer, chemicals, etc. ``It can also be applied to the case where a preset amount of liquid (1) is to be accurately fed into a predetermined container.

The present invention is not limited to the above embodiment. For example, the flow shown in FIG. 5 may be replaced by a counter 3o for each control. This is a combination of a moped counter 14 and a reset counter 2o as shown in FIG. reset range (for example, if the count of target value Q1 at counter 3o is 500,
If the island reaches 480 to 490 counts before reaching this point, the target flow value Q J and the storage capacity of tank 6 Mf'
cii Q and the difference Ql-Q are reset to the counter 3o. For example, the full scale of counter 30 is 100.
The count is 0, and the flow is 1 for the target value of count 500.
! If the skin count is reset at 486, the count value preset in the counter 30 will be 1986 counts. Next, stream b1 is sent and the count advances,
Assume that the count of counter 30 reaches 10 (l O count. At this time, counter 3゜ is CI"UJJ
Send an interrupt signal to. This causes the CPU to
A signal to close the valve is sent to the 4-Y valve 5. This closes the operation valve 5 and stops the flow to the tank 6.

Therefore, the flow 1u shown in FIG. 5:++control device ηI
O, but please control the flow to tank 6.

It is possible to accurately send heavy oil only at the target flow rate Q1.

Also, this style 1 system? It is possible to accurately send 71 pieces of light oil, beer, goods, etc. to a predetermined container by a target flow rate of IQ1, rather than just using an aluminum box.

〔Effect of the invention〕

In the present invention, when the tank C: the flow of fluid to be sent (11) reaches the target flow, the CP is immediately changed from the no-reset counter.
Interrupt No. 4d is sent to II - (Since the operating valve is fully closed 1", even if the control period is 114 seconds, it is necessary to provide a flow control device that can accurately send 4 jets. I can do it.

[Brief explanation of drawings]

Figure 1 is a schematic block diagram of a flow control device applied to sending heavy oil into a tank, Figure 2 is a block diagram of a conventional flow control device, and Figures 3 (a) to (1) are flow control devices. r
The system for controlling 11 is shown in the parable turn diagram % Figure 4.
FIG. 5 is a block configuration diagram of the flow control device d according to the present invention. It is a block (1゛N diagram) showing a modification of the flow control device d. Oil) θi! ! Factory tank, 3...Resistance temperature sensor, 4...Flow jj) Ml' *
5... Operation valve, 6... Tanker tank, 10.
... Flow rate open side 1 device, 11... Recording section, 12... Control 1 pulse generating section, 13... Central processing unit %14.
...Flow hl counter, 15...Pass. I6...1)-A converter, 17...Temperature measurement section, 1
8...A-1) qlF;, container, 20...preset counter.

Claims (1)

[Claims] 11 (in the supply flow tit control device, the flow 1i of the IAf body) is determined by the detection signal from the flow detection unit and the temperature measurement signal from the temperature detection unit. control means for controlling the opening and closing of an operating valve based on the deviation between this flow t11 and the flow rate of one control no f turn, and an integrated sum lA of the flow t'+1.
The predetermined range before f lrl reaches the current 111'! When the total flow reaches two per day, the difference between the cumulative flow 9 and the control/all-turn flow [, l is reset, and when this difference becomes zero, an interrupt signal is sent to the control means to perform the operation. The flow control device is characterized in that it comprises a preset means for closing the valve.