JPS60134919A - Fluid controller - Google Patents

Abstract

PURPOSE:To cope with various kinds of meter number of fluid with one device by providing a selecting switch and a signal generator which generates a variable upper limit value in accordance with the meter number or fluid type signal from this switch. CONSTITUTION:If the device should cope with four kinds of meter number, the second, the third, the fourth, and the seventh and two kinds of fluid, 6B and 6C, set positions of a code switch 13 and its output codes are prescribed as shown by a table 1. On the other hand, upper limit values of individual kinds of meter number and fluid are set to values different from one another as shown by a table 2. Data of a table 3 are stored in an ROM14 as the signal generator on a basis of these two tables. If the kind of meter number and the kind of fluid to be coped with are the second and 6C, the output code of the switch 13 is 4. The ROM14 outputs data ''21'' in address 4 as the upper limit value. A comparator 9 compares upper limit value ''21'' and the counted value of a counter 5 with each other, and a cut-off signal is outputted if the counted value exceeds 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluid control device that detects a fluid flow rate and "blocks" the fluid supply when the fluid flow rate is abnormally high.

Configuration of the conventional example and its problems As an example of the conventional fluid control device shown in FIG. This flow rate pulse is counted by the counter 5 of the controller 4.

The counter 5 counts pulses by a count of 1jiS6, and is reset by a reset signal sent from the Quimuff every predetermined time. A comparator 9 compares the count value of the counter 5 and the upper limit value from the upper limit signal generator 8, and when the former exceeds the latter, the comparator 9 outputs a cutoff signal. In response to this cutoff signal, the cutoff valve 10 cuts off the fluid supply.

The flow rat sensor 3 is composed of, for example, a magnet and a magnetic field detector provided on the measuring membrane of the fluid meter 2 or its responsive portion. In such a configuration, if the meter number representing the size of the fluid meter is different, the weight of the first flow pulse is different,
In addition, the meter number is selected depending on the fluid consumption amount, and the flow rate for determining whether it is abnormal or normal is different, so the upper limit value from the upper limit number 1 generator must be changed depending on the meter number. The equipment cannot support all meter numbers. Further, the degree of danger depends on heat generation rather than flow rate, and it is desirable to set an upper limit value depending on the type of supplied fluid, but this cannot be done in the conventional example.

OBJECTS OF THE INVENTION The present invention solves the drawbacks of the prior art and provides a fluid control 1L11 device that can adjust the upper limit value generated from an upper limit signal generator according to the meter number and the type of fluid supplied. purpose.

Structure of the Invention In order to achieve the above object, the fluid system side 1 device of the present invention comprises:
- ] - The limit signal generator is composed of a meter number or fluid type selection switch, and a signal generator that generates a different upper limit value depending on the meter number signal or fluid type signal from the selection switch, Fluid meters of various sizes with one device,
This has the effect that it can be adapted to the type of fluid to be supplied, and that it is easy to inspect the device since the individual meter numbers or upper limit values are different for each fluid type.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the same numbers as in FIG. 1 indicate the same items. 1
1 is a controller, which differs from controller ii 4 in FIG. 1 in the following points. Reference numeral 12 denotes an upper limit signal generator, which uses a coat switch 13 as a node number fluid selection switch and the output of the code switch 13 as address inputs, stores a different limit value for each address, and stores a different limit value for each address. The ROM 14 serves as a 100-digit generator that outputs the data at the address designated by ``2'' as 1-direction.

The operation of the above configuration will be explained below.

On the other hand, if the meter numbers to be 6 are set to 4 types: 2, 3, 5, and 7, and the fluid types are 2 types, 6B and 6C, the setting position of the code switch 13 and its output code are set to 1. Specify as shown in the table.

Table 1 On the other hand, the upper limit values for various meter numbers and fluid types are all set to different values as shown in Table 2.

In the second table ROM 14, the data of the third table is stored in the valley 7 traces from the above two tables.

If it does not correspond and the meter number fluid type is 2 ec5,
The output code of the coat switch 13 becomes "4". R
The OM 14 outputs data "21" at address "4" as an upper limit value according to the output code of the code switch 13. The comparator 9 compares this upper limit value "21" with the count value of the counter 5, and outputs a cutoff signal if the counted value of the counter 5 exceeds "21". When dealing with a different meter number and fluid type, it is only necessary to change the setting of the code switch 13.

In this way, according to this embodiment, it is possible to compare various meter numbers and fluid types by changing the settings of the code switch, so that one device can correspond to different meter numbers and fluid types. In addition, since the upper limit values stored in the ROM are all different, by inputting this upper limit value into the counter within a predetermined time and checking the presence or absence of a cutoff signal, you can check whether the code switch 11 has been set correctly and whether the device is working normally. It becomes extremely easy to check whether the system is working properly or not. For example, in the above example, when a flow rate pulse signal of "21" is manually applied to the counter within a predetermined time, it is normal for the comparator to output a cutoff signal, and a cutoff signal is output before inputting ff21', j source. If the cut-off signal is not output even if the "21" activation force is applied, it can be determined that the device is abnormal. As described above, according to this embodiment, it is possible to deal with various meter numbers and fluid types, and has the advantage of facilitating inspection.

In the above-described embodiment, the code switch is used to handle both the meter number and the type of fluid, but if the type of fluid is only Ichizen, it may be compatible with only the meter number.

Effects of the Invention As described in 2), the present invention can achieve the following effects (4).

(1) - A single device can handle various sizes of meters and supply fluids.

(2) Equipment inspection becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional fluid control device, and FIG. 2 is a schematic diagram of a fluid control device according to an embodiment of the present invention. 1 - Fluid flow path, 2 - Fluid meter, 3 - Flow rate sensor, 5 Counter, 9 Comparator, 10 - Shutoff valve, 12 - Upper limit signal indicator, 13 - Code switch, 14 ...ROM.

Claims (1)

[Claims] A fluid meter installed in the fluid flow path measures the unit flow rate 4
A flow t7t sensor that transmits a flow rate pulse signal at υ, a counter that counts the flow rate pulse signal to 1 for a predetermined period of time, a limited signal generator that stops the limit area, and a counted value from the Ail counter. , a comparator that compares the upper limit value from the upper limit signal generator and outputs a cutoff signal when the former is lower than the upper limit value, and a cutoff valve that cuts off the fluid supply in response to the former alLlr signal; The signal generator is a fluid control device in which a selection switch that selects a meter number or fluid type, and a signal generator that sets a different upper limit depending on the meter number or fluid type signal from the selection switch.