JPS6294587A - Liquid feeder - 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 Field of the Invention The present invention relates to a liquid supply device in, for example, an oil liquid shipping system, and particularly relates to a liquid supply device that measures the weight of liquid supplied and has a simple configuration.

Conventional technology For example, in an IPG shipping system for shipping LPG (liquefied petroleum gas), the amount of liquid supplied to a trolley is traded in units of weight ω.

Among these LPG shipping systems, there is a system configured so that automatic weight filling can be performed by a simple operation by a lorry driver. This type of LPG shipping system, as shown in Figure 4, flows into the supply line that supplies IPG to the east of the row.
Total 1. The pulse input circuit 3 receives 51 flow rate pulses sent from the flowmeter 1 and outputs them to the control unit 1. Temperature (No. 1i) of temperature measuring resistance interface circuit 5
and processed by the A/D conversion circuit 6 and sent to the control unit 4)
] The control unit 4 determines a volume conversion coefficient based on these supplied data and preset specific gravity data of the fluid to be measured, and multiplies the flow rate pulse count value by the volume conversion coefficient. The structure was such that the vehicle could be filled with a predetermined weight of ♀ at a predetermined rate. Also, in general lPGAS
On the ground, there are multiple fluid supply points 1 for supplying fluid to the rolling wheels, so that it is possible to supply fluid to a large number of rolling wheels at the same time, depending on the type of oil. Therefore, the total flow is 1. A plurality of pulse input circuits 3 and control units 4 are provided corresponding to the liquid supply points in order to perform automatic constant 1ffi filling at each liquid supply point. The resistance temperature detector interface circuit 5 and the A/D conversion circuit 6 were also arranged in several stages corresponding to the liquid supply points, and were connected to each control section 4.

Problems to be Solved by the Invention However, in the liquid supply device used in the above-mentioned conventional LPG shipping system, each of the control units 4, which are arranged in the same number as the number of liquid supply points, is equipped with a temperature measuring resistor 2 and a temperature measuring resistor. Since the configuration was such that the physical interface circuit 5 and the A/D conversion circuit 6 were connected, there were problems in that the configuration of the shipping system became extremely complicated and the cost of the shipping system increased. LPG stored in a tank
Considering the case where liquid is supplied to a rolling stock from multiple liquid supply points, there are 16 controls corresponding to each liquid supply point, even though the temperature of the LPG supplied from each liquid supply point 1- is the same. In the section 4, temperature signals are read from the temperature measuring resistors 2 separately, a volume conversion coefficient is determined, and this is multiplied by the crystallization and the flow rate. In other words, there is a waste of redundant processing in each control section 4, and it is necessary to incorporate an arithmetic circuit for calculating the volume conversion coefficient into each control section 4, which requires the configuration and software of the control section 4 itself. There was a problem that the configuration of both of them became complicated.

Therefore, in the present invention, the configuration for determining the volume conversion coefficient is controlled 1.
It is an object of the present invention to provide a liquid supply device that solves the above-mentioned problems by providing it separately from one part and configuring it so that each control part can share it.

Means and Action for Solving the Problems In order to solve the above problems, the present invention provides liquid supply devices that are arranged in a plurality of branch pipes branched from the main pipe through which the fluid to be measured flows. A flow meter, a single temperature detection means installed in the main pipe to detect the temperature of the fluid to be measured, and a coefficient output that outputs a volume conversion coefficient corresponding to the temperature of the fluid to be measured detected by the temperature detection means. A means and a flow rate are arranged corresponding to the meters, respectively, and a flow ω signal is supplied from each flow meter, and a volume conversion coefficient is supplied from the coefficient output means, and a volume conversion coefficient is determined for the flow rate signal. It was constructed by means for calculating 11.

By configuring the liquid supply device as described above, it is possible to supply volume conversion coefficients to multiple calculation means with a single temperature detection means, and it is possible to supply volume conversion coefficients to multiple calculation means with a single temperature detection means. It becomes possible to share the coefficient output means with a plurality of calculation means.

Embodiment FIG. 1 shows an embodiment of the liquid supply device according to the present invention. The liquid supply device 7 shown in the same figure is installed at an LPG shipping base, for example, and roughly includes a storage tank 8.9, a pump 10,
11, Liquid supply piping (main piping) 12.13, Liquid supply stage 1
4, a temperature measuring resistance unit 15, quantitative meter units 1-16, etc.

Two types of LPG with different mixing ratios, for example, butane gas and methane gas, are stored in the storage tanks 8.9.The LPG in each storage tank 8.9 is pumped to the liquid supply stage 14 by a pump 10.11, respectively. It is conveyed within the liquid supply pipe 12.13. The liquid supply stage 14 is a place where liquid is supplied to a roller wheel (not shown), and the liquid supply stage 14 has a plurality of (six in the figure) liquid supply points 17a to 17f.
is set up. Among these, liquid supply points 17a to 17
c is connected to the liquid supply pipe 12, and the liquid supply point l
-17d- and 17f are connected to the liquid supply pipe 13.

J: Each liquid supply pipe 12.13 is branched along its route corresponding to the number of connected liquid supply points h17a to 17f, and branch pipes 12a to 12c, 13
d to 13f are formed. In addition, each liquid supply point h1
7 a to 17 f have people b) ≧ hanging 5118 a to 18 f
The flowmeters 18a to 18f measure the flow rate of LPG supplied to the roller car at J3 at each of the supply points 17a to 17G. Furthermore, each branch pipe 12a
~12c.

13d to 13f are equipped with solenoid valves 19a to 19f that close the branch pipes 12a to 12c and 13d to 13f when a predetermined weight of LPG is supplied to the roller wheel. The liquid supply pipes 12 and 13 are equipped with resistance temperature sensors 20 and 21 for detecting the temperature of the LPG flowing inside them.
is provided at one location for each liquid supply pipe 12 and 13. Liquid supply point 17a from Zunawara's storage tank 8
Liquid supply pipe 12 and branch pipes 12a to 12 reaching ~17C
Only one resistance temperature detector 20 is provided for c, and similarly, liquid supply points 17d to 17f are connected from the storage tank 9.
Only one resistance temperature detector 21 is provided for the liquid supply pipe 13 and the branch pipes 13d to 13f.

Each of the configurations described above is installed at a so-called liquid supply site where LPG is supplied to a trolley.

Next, the resistance temperature detector unit 15 and the quantitative meter unit 16, which are installed in, for example, an electrical room in a building located away from the site, will be explained using mainly FIG. 2. Resistance temperature detector unit 1-15 has resistance temperature detector 20.21
J'3 is connected, and the volume conversion coefficient circuits 22a and 22b calculate the volume conversion coefficient based on the temperature detected by the resistance temperature detector 20.21, the temperature of PG, and the specific gravity. It is installed internally. Here, we will briefly explain the conversion of LPG into small amounts. As mentioned above, l-PG is generally heavy! is traded as a unit. There,
To realize automatic constant weight filling of PG, flow meter 18a ~
Based on the liquid supply ♀ to the lorry ton obtained from 18f, it is necessary to convert this into car m. A small amount of LPG (flame cylinder is installed according to the following procedure.
The flow signal (PAL No. 2151) supplied from f is supplied to volume conversion coefficient circuits 22a and 22b, and is converted into a flow B signal at 15°C. Furthermore, this flow rate signal is supplied to a converter, where it is multiplied by the specific gravity corresponding to the type of PG, and the type of LPG is determined. The LPG market is calculated by integrating the coefficients obtained as a result of sifting these parameters with relative weights, which are called volume conversion coefficients. Specifically, the above-mentioned volume conversion coefficient circuits 22a, 22b and specific gravity setting circuit 23a are incorporated.

23b, dip switches 24a and 24b that can set the specific gravity according to the type of LPG, a bus control unit 25 described later, and the like are provided.

The quantitative meter units 16 are provided in the same number as the flowmeters 18a to 18f, and are connected to each other by 1a, and are connected to the solenoid valves 19a to 19f.
Branch piping 12a to 12c for 19f.

It is composed of liquid supply amount control units 26a to 26f that supply signals for opening and closing 13d to 13f. Each of these liquid supply amount control units 26a to 26f' has a flow rate of ff1=1.
A counter circuit (not shown) is provided to calculate the coefficient gi of the flow rate signal supplied from 1sa to 18f, and liquid is supplied from liquid supply points 178 to 17f corresponding to each liquid supply amount control unit 268 to 26f. DIP switches 27a to 27f are provided for selecting the type of LPG, respectively. The above-mentioned side temperature resistance unit 15 and quantitative meter unit i
16 are connected by a bidirectional bus 28.

The operation of the liquid supply device 7 having the above configuration will be explained below. In addition, in FIG. 2, flow words 18a to 18f and ff [
Connections of the valves 19a to 19f are omitted from illustration. The tank of the lorry vehicle that will temporarily supply liquid is divided into three rooms, and the liquid supply points l-17a, 17b, 1 are in the winter sky.
The case where the liquid supply fl operation is performed using 7f will be explained. First, paying attention to the resistance temperature detector unit 15, the dip switch 24a provided in the resistance temperature detector unit 15
, 24b, the specific gravity of LPG whose temperature is detected by the four resistors 20, 21 is set in advance. That is, the dip switch 24a is connected to the LP stored in the storage tank 8.
The specific gravity of LPG stored in the storage tank 9 is set in the dip switch 24b. The temperature Tσ detected by the energy depletion resistor 20 is converted into a volume 1! by the volume conversion coefficient circuit 22a. i! ! A calculation coefficient is calculated, and the bus control unit 25 sudock this calculated volume conversion coefficient. In addition, hereinafter, the volume conversion coefficient calculated based on the temperature and specific gravity from the resistance temperature detector 20 will be referred to as the volume conversion coefficient of channel 1, and the volume calculated based on the temperature signal from the resistance temperature detector 21 will be referred to as the volume conversion coefficient of channel 1. The conversion coefficient is referred to as the channel 2 volume conversion coefficient.

Next, focusing on the quantitative meter unit 16, each of the liquid supply amount control units 26a to 26f constituting the quantitative meter unit 16 will be described.
The number of channels mentioned above is preset in the DIP switches 27a to 27f provided in the . That is, a liquid supply point h1 that supplies LPG stored in the storage tank 8.
Supply liquid amount control units 26a to 2 corresponding to 7a to 17c
Ditub switches 27a to 27c of 6c are set to channel 1, and similarly, liquid supply amount control units 266 to 2
Ditub switches 27d to 27f at 6f are set to channel 2. Here, the driver of the roller vehicle (the person who performs the liquid supply work) operates the operation panel 29 when the preparation for liquid supply is completed, and specifies the liquid supply point to be used, and also performs the operation of the roller vehicle at each liquid supply point. Enter the weight of the LPG you want to fill your car with. As a result, an activation signal is supplied to the bus control unit 25 of the resistance temperature detector unit 15, and the designated liquid supply points 17a, 17b are supplied.

Supply liquid amount control unit 26a corresponding to 17f.

Predetermined liquid supply revisions are stored in 26b and 26f. When the bus control unit 25 is supplied with the activation signal, the designated liquid supply points 17a, 17b are supplied.

Liquid supply a control unit 26a corresponding to 17f.

Selection signals a, b, and f are output to 26b and 26f.

The liquid supply opening control units l-253, 26b, and 26f open the dip switch 27 in advance when the m selection signals a, b, and f are supplied.
The channel numbers set in a, 27b, and 2'7f are output onto the bus 28, and a response signal @q is output to the bus control unit 25. When the bus control unit 25 is supplied with the response signal q, it reads the channel number set in each liquid supply amount control unit 26a, 26b, 26f on the bus 28, and transmits the volume conversion coefficient corresponding to each channel number to the bus 28. It is supplied to each liquid supply amount control unit 26a, 26b, 261' via. Na a3
The volume conversion stop coefficient is a coefficient with 4 digits after the decimal point, and bus 28
The liquid supply a control unit 26a, 2 of the volume conversion factor via
Signals are supplied to 6b and 26f for each digit. The specific flow of this process is shown in FIG.

One volume conversion coefficient corresponds to each liquid supply control unit 26a.

26b, 26r', the Salert pumps 10.11 are started, and each liquid supply amount control unit 26a is started.

A valve opening signal is supplied from 26b and 26f to the solenoid valves 19a, 19b, and 19f, and the gas in the storage tanks 8 and 9, PG
The liquid begins to flow toward the liquid supply points 17a, 17b, and 17r and is supplied to the rolling wheels. Also, LP is supplied to lorry vehicles.
The outflow of G is 11 flows totaling 18a.

13b, 18f, and this flow ω signal is supplied to each liquid supply amount control unit t''26a, 26b, 26f.

Liquid supply m control units 26a, 26b.

26f is a liquid supply chamber control unit 1-26a which counts and integrates the outflow signals supplied from the flowmeters 18a, 18b, and 18f using an internal counter circuit.

26b, 261' to the bus control unit 25 at predetermined time intervals.
8 to convert the flow ω signal into a weight signal. That is, the volume conversion coefficient is corrected at predetermined intervals in accordance with the temperature of the fluid to be measured. When this weight ff1 (Fi number) reaches the predetermined liquid feed weight input from the two operation panels, each liquid feed control unit 26a,
26b, 26f supply a valve closing signal to the solenoid valves 18a, 18b, 18f, so that the solenoid valves 18a, 18b, 18f are closed, and liquid supply from the liquid supply points 17a, 17b, 17f is stopped. Along with this, the pumps 10 and 11 are stopped, and the liquid supply operation to each unit 1-beam cellar 1 is completed. Through the above series of operations with a liquid supply amount of "17", LPGt is automatically filled at a constant weight, and the driver of the lorry can extremely easily fill the LPGt with a constant weight.
PG liquid supply work can be performed.

What should be noted here is the above series of liquid supply operations; J3
and the volume conversion coefficient is calculated from the resistance temperature detector unit 15 to each liquid supply port control unit l-26a to 2 of the quantitative h1 unit 16.
6f via the bus 28. That is, each of the liquid supply control units 26a to 26f is configured to share the resistance temperature detector unit 15.

This connects the resistance temperature detectors 20 and 21 to each liquid supply system (storage tank 8
．． This is due to the fact that the volume conversion coefficient circuits 22a and 22b are separated and independent from the quantitative meter unit 16.

Generally, the liquid supply stage 14 and the storage tank 8.9 are arranged relatively close to each other, and the temperature of the LPG within the liquid supply system is approximately constant. Therefore, as long as the resistance temperature detectors 20 and 21 are in the liquid supply system, they can detect the LPG 411 regardless of the installation position. Yotsu τ branch piping 12a ~ 12C913d ~
It is not necessary to provide a resistance temperature detector for every 13f, and it is sufficient to provide one resistance temperature detector 20.21 in the liquid supply system as in this embodiment, and the temperature signal detected by this resistance temperature detector 20.21 By sharing this with each of the liquid supply amount control units 26a to 26f, the structure of the liquid supply device 7 can be extremely simplified and costs can be reduced. In line with this,
The volume conversion coefficient circuits 22a and 22b, which are supplied with temperature signals from the resistance temperature detectors 20 and 21 and output a volume conversion coefficient of 9, are also separated from the liquid supply amount control units 26a to 26f, and are connected to each liquid supply amount control unit 26a. It becomes possible to have a configuration that is shared by 26f to 26f. Further, specific gravity setting circuits 23a, 23b necessary for converting LPG into ml and dip switches 24a, 24b for setting specific gravity are connected to the resistance temperature detector unit 1.
By incorporating the volume conversion factor into
U) at the resistance temperature detector unit 15 separated from ~16
It is important to have a configuration that allows In other words, it is no longer necessary to calculate the volume conversion coefficient for each liquid supply amount control unit, as in the past. As a result, it is sufficient that the software for calculating the volume gap coefficient is incorporated into the resistance temperature detector unit 15, and the software for calculating the volume gap coefficient is incorporated into the resistance temperature detector unit 15.
Since there is no need to incorporate the above software into f,
The software configuration within the liquid supply amount control units t-26a to t-26f can be extremely simplified. Furthermore, since the resistance temperature detector units 1 to 15 and the quantitative meter unit 16 are configured to be connected via the bus 28, the increase or decrease of the resistance temperature detector connected to the resistance temperature detector unit 15 and the quantitative meter Since the number of liquid supply R control units in the unit 16 can be freely increased or decreased without being affected by each unit 15, 16, the liquid supply system can be freely configured according to the scale of the liquid supply base and the number of liquid supply points. can do.

Effects of the Invention As described above, according to the liquid supply device of the present invention, the negative temperature detection means (temperature measuring resistor) and the coefficient output means connected thereto are shared by a plurality of calculation means (liquid supply M control unit). This makes it possible to reduce the number of devices constituting the liquid supply device and reduce costs.In addition, the arithmetic circuit and rough hardware for calculating the volume conversion coefficient can be separated from the arithmetic means. This eliminates the need to incorporate the above-mentioned circuit and software into each calculation means, making the circuit configuration and software configuration of the calculation means extremely simple.Furthermore, the temperature detection means and coefficient output means can be reduced by 1 minute compared to the calculation means! By making it possible to increase or decrease the configuration of each means, the configuration can be increased or decreased without being influenced by each other.
It has the advantage of being able to freely configure the liquid supply device according to the scale of the liquid supply base and the number of liquid supply points.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the liquid supply device according to the present invention, and FIG.
A configuration diagram for explaining the configuration and connections of one unit,
Fig. 3 is a flowchart showing the procedure by which the bus control units 1 to 51 supply volume conversion coefficients to the quantitative unit 1, and Fig. 4 is a circuit configuration diagram for explaining the control system of an example of a conventional refueling device. It is. 7...Liquid supply device, 12.13...Liquid supply piping (main piping), 12a to 12c, 13d to 13f-...Branch piping, 15...Resistance temperature detector units 1 to . 16...
Quantitative meter unit, 17a to 17f...liquid supply point,
i8a~18 f-... style fij if, 19 a~
19 f... Solenoid valve, 20° 21... Resistance temperature sensor, 22a, 22b... Volume conversion coefficient circuit, 23a, 2
3b... Specific gravity setting circuit, 25... Bus control unit, 26a to 26f... Liquid supply ω control unit 1-
128...Bus, 29...Operation panel.

Claims (1)

[Claims] a plurality of flowmeters respectively arranged in a plurality of branch pipes branched from a main pipe through which a fluid to be measured flows, and a single temperature detection means provided in the main pipe to detect the temperature of the fluid to be measured; , a coefficient output means for outputting a volume conversion coefficient corresponding to the temperature of the fluid to be measured detected by the temperature detection means, and a coefficient output means for outputting a volume conversion coefficient corresponding to the temperature of the measured fluid detected by the temperature detection means; 1. A liquid supply device comprising: a calculation means to which the volume conversion coefficient is supplied from the coefficient output means at the same time as the signal is supplied, and which multiplies the flow rate signal by the volume conversion coefficient.