JPH11287690A - Seismoscopic interrupting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize the device and improve the flow measuring precision by providing a plurality of passage opening and closing means for opening and closing a plurality of passages and closing the passage opening and closing means other than the passage having a flow measuring means when an earthquake is detected. SOLUTION: When both passage opening and closing means 2a, 2b are in open state, a fluid is carried to respective passages 1a, 1b in a ratio determined by the structure of the passages 1a, 1b. Since a flow measuring means 3 detects the flow rate of the fluid carried in the passage 1b, the whole flow rate can be determined by multiplying the flow rate value measured by the flow detecting means 3 by the flow ratio of the passages 1a, 1b. When an earthquake is detected by a vibration detecting means 5, a control means 4 closes the passage opening and closing means 2a other than the passage 1b having the flow detecting means 3. Then, the fluid is entirely carried to the passage 1b, and the total flow rate is measured by the flow measuring means 3. The total flow rate is measured by the flow measuring means 3 after the occurrence of the earthquake to judge whether the leakage of the fluid is caused by the earthquake or not, whereby a precise detection can be performed even in a small flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device that detects an earthquake and shuts off gas and liquid flow paths.

[0002]

2. Description of the Related Art A conventional seismic isolation device of this type is disclosed in
Those described in JP-A-219829 were generally used. As shown in FIG. 10, this seismic isolation device (gas isolation device) has a vibration detection means 105 for detecting an earthquake, and a flow rate measurement means 103 measures the flow rate of gas flowing through one flow path 101. Have been.

When an earthquake occurs, the vibration detecting means 10
5 detects that an earthquake has occurred and the flow rate measuring means 103 measures the flow rate before and after the occurrence of the earthquake for a certain period of time, and if the flow rate is equal to or higher than a preset flow rate, the flow path opening / closing means 102
Was to be shut off.

Further, as disclosed in Japanese Patent Application Laid-Open No. 10-38620, there is disclosed an apparatus having a vibration detecting means and using an ultrasonic type flow measuring means as the flow measuring means.

[0005] As described above, the ultrasonic type flow rate measuring means measures the flow rate in a shorter time than the conventional mechanism in which two bags having a constant volume alternately take in and discharge gas. It has measurable advantages. Here, FIG. 11 shows an example of a flow meter using an ultrasonic type as the flow rate measuring means. As shown in the figure, an ultrasonic element 110 is provided on the upstream side and the downstream side of the flow path 114, respectively, and a signal generation / processing unit 111a that generates a signal to the ultrasonic element 110 or processes a signal from the ultrasonic element 110 And signal generation
An operation unit 1 that calculates a flow rate based on data of the processing unit 111a
The flow rate measuring means 111 provided with 11b is provided. The intermittent operation means 112 is connected to the signal generation / processing section 111a and the arithmetic section 111b, and causes them to intermittently operate. The power supply 113 supplies electric power to the above-described units. Intermittent operation means 11
2 performs the intermittent operation of the signal generation / processing unit 111a and the arithmetic unit 111b in order to suppress power consumption and to enable the capacity of the power supply 113 to be used for a set specification time (for example, 10 years).

[0006]

However, in the above-mentioned conventional seismic isolation device, a large flow passage is required in a flow passage where a large flow rate flows at normal times, so that it is necessary to use a large flow passage opening / closing means. In addition, a circuit for controlling this has become larger, which has led to an increase in the size of the device. Furthermore, since it is necessary to measure the flow rate from a small flow rate to a large flow rate, a wide dynamic range is necessary especially in the ultrasonic type flow rate measuring means, so that the circuit becomes large and the flow rate measurement accuracy is increased. It was difficult to take. Furthermore, even if the flow rate measuring means has a flow rate measuring means using an ultrasonic method with a short measurement time, the flow rate measuring means generally performs an intermittent operation to suppress power consumption. Depending on the measurement timing, even if an earthquake is detected by the vibration detecting means, the flow rate measurement is not performed immediately, so that there is a problem that the cutoff is delayed by an intermittent cycle of the maximum flow rate measurement.

[0007]

According to a first aspect of the present invention, there is provided a flow control apparatus comprising: a plurality of flow path opening / closing means for opening / closing a plurality of flow paths; The means closes the flow path opening / closing means other than the flow path provided with the flow rate measuring means.

According to the present invention, the flow rate can be reduced by using a plurality of flow paths and measuring the flow rate of one of the flow paths. Since the flow path is closed and the flow rate is measured only by the flow path where the flow rate measuring means is installed, the flow rate can be measured with high measurement accuracy. In the second means of the present invention, in order to solve the above-mentioned problem, the time is measured by the time-measuring means. The road opening / closing means is closed, and the flow rate is measured.

According to the present invention, a long-term leak of a minute flow rate can be detected to improve the accuracy of flow rate measurement when the flow rate is small.

According to a third aspect of the present invention, in order to solve the above-mentioned problem, a threshold value for shutting off the flow path opening / closing means based on a flow rate is set after a vibration detection means detects that an earthquake is detected. Within the specified time measured by
The control means compares the threshold value with the flow rate in the cutoff setting storage section and the second cutoff setting storage section, and shuts off the flow path opening / closing means if the flow rate is large. According to the above invention, during the earthquake, the control means shuts off the flow path opening / closing means by comparing the measured flow rate value with a threshold value larger than the threshold value for a predetermined period after the earthquake has subsided. Can be suppressed.

According to a fourth aspect of the present invention, in order to solve the above-mentioned problems, after an earthquake occurs, the measurement control section constituting the control means advances the measurement cycle of the flow rate measurement means and further increases the number of times. This is an improvement in the accuracy of flow rate detection.

According to the above invention, after the vibration detecting means detects the earthquake, the control section closes the flow path opening / closing means other than the flow path provided with the flow rate measuring means, the measurement control section advances the measurement cycle of the flow rate measuring means, In order to further increase the number of times, it is possible to improve the accuracy of small flow rate detection during an earthquake.

According to a fifth aspect of the present invention, in order to solve the above-mentioned problems, a period initialization unit for initializing a measurement period of a measurement control unit is provided. Is intended to initialize the measurement cycle of the flow rate measuring means.

According to the present invention, the cycle initialization unit initializes the measurement cycle of the flow rate measuring means, so that the flow rate can be measured immediately after the occurrence of the earthquake and the flow path opening / closing means can be shut off.

In order to solve the above-mentioned problems, the sixth means of the present invention has a cycle changing unit for changing the measurement cycle of the measurement control unit, and the cycle changing unit measures the flow rate when the vibration detecting means detects an earthquake. The measurement cycle of the means is changed.

According to the above invention, when the vibration detecting means detects an earthquake, the cycle changing unit changes the measurement cycle of the flow rate measuring means, so that the flow rate measurement can be performed while suppressing the influence of the vibration during the earthquake.

According to a seventh aspect of the present invention, in order to solve the above-mentioned problem, the integrating section integrates the measured value of the flow rate measuring means, and when the vibration detecting means detects an earthquake, the integrated value and the setting of the setting storing section are set. The flow rate is compared with a value by a flow rate determination unit, and when the flow rate is large, the flow path opening / closing means is shut off.

According to the above invention, when the vibration detecting means detects an earthquake, the flow rate determining section compares the integrated value of the integrating section with the set value of the setting storage section to determine the flow rate. Even if the instantaneous value fluctuates due to the influence of vibration, erroneous shutoff of the flow path opening / closing means can be eliminated.

According to an eighth aspect of the present invention, in order to solve the above-mentioned problems, the average calculating section integrates the average value of the flow rate measuring section, and when the vibration detecting section detects an earthquake, the average value of the average calculating section is calculated. The setting value in the setting storage unit is compared by the flow rate determining unit, and if the flow rate is large, the flow path opening / closing means is shut off.

According to the invention, when the vibration detecting means detects an earthquake, the flow rate determining section compares the average value of the average calculating section with the set value of the setting storage section to determine the flow rate. Even if the instantaneous value fluctuates due to the influence of vibration, erroneous shutoff of the flow path opening / closing means can be eliminated.

According to a ninth aspect of the present invention, in order to solve the above-mentioned problem, after detecting the vibration by the vibration detecting means, the flow rate measuring means is provided immediately before the zero point correction unit opens the closed flow path opening / closing means by the control means. The zero point correction is performed.

According to the above invention, the zero point correction section performs the zero point correction of the flow rate measuring means immediately before opening the closed flow path opening / closing means by the control means. Then, the offset of the flow rate measuring means can be canceled and the measurement accuracy can be improved.

[0023]

The seismic isolation device according to claim 1 of the present invention includes a plurality of flow paths, a plurality of flow path opening / closing means for respectively opening and closing the flow paths, and a flow rate of at least one flow path. A flow rate measuring means for measuring, a vibration detecting means for detecting vibration such as an earthquake, and a control means for processing a signal from the flow rate measuring means and the vibration detecting means and controlling the flow path opening / closing means; Control means for closing the flow path opening / closing means other than the flow path provided with the flow rate measuring means when vibration is detected by the control means.

By using a plurality of flow paths and measuring the flow rate of one of the flow paths, the flow rate measuring means can be reduced in size, and when vibration is detected by the vibration detecting means, the control means can control the flow rate. Since the flow path opening / closing means other than the flow path provided with the means is closed and the flow rate is measured only in the flow path where the flow rate measuring means is installed, the flow rate can be measured with high measurement accuracy.

According to a second aspect of the present invention, there is provided a seismic isolation device, comprising: a plurality of flow paths; a plurality of flow path opening / closing means for respectively opening / closing the flow paths; and a flow rate measuring means for measuring a flow rate of at least one flow path. Means, time measuring means for measuring time, vibration detecting means for detecting vibration such as an earthquake, and the flow rate measuring means,
Vibration detecting means, having a control means for processing the signal from the timer means and controlling the flow rate opening and closing means, a setting storage unit for storing a preset flow rate set value, the flow rate measuring means and the setting storage unit And a control unit including a control unit for controlling the flow rate opening / closing means based on the outputs of the flow rate determination unit, the flow rate measuring means, the time measuring means, and the vibration detecting means.

The timer means recognizes that the predetermined time has elapsed, and when the flow rate measured by the flow rate measuring means is small, the control means closes the flow path opening / closing means other than the flow path provided with the flow rate measuring means, Since the flow rate is measured only by the flow path in which the flow rate measuring means is installed, highly accurate measurement can be performed, and long-term leakage of a minute flow rate can be detected.

According to a third aspect of the present invention, there is provided a seismic isolation device comprising: a first shutoff setting storage unit for storing a flow rate setting value when shutting off the flow path opening / closing means while the vibration detecting means detects vibration; A second shutoff setting storage unit for storing a flow rate setting value for shutting off the flow path opening / closing means within a predetermined time counted by the timing unit after the end, a first shutoff setting storage unit, a second shutoff setting storage unit, The control unit includes a control unit including a measurement unit, a vibration detection unit, and a control unit that controls the flow opening / closing unit based on an output from the timing unit.

When the vibration detecting means detects an earthquake, the control means sets a larger set value (threshold) than the set value stored in the second cut setting memory stored in the first cut setting memory.
For a predetermined period after the earthquake has subsided, the measured flow value is compared with the measured flow value at a set value (threshold value) stored in the second shutoff setting storage unit to shut off the flow path opening / closing means. Even if the instantaneous value fluctuates due to the influence of vibration, the influence can be suppressed because the set value is large during the earthquake.

According to a fourth aspect of the present invention, there is provided a seismic isolation device including a plurality of flow paths, a plurality of flow path opening / closing means for respectively opening and closing the flow paths, and a flow rate measuring means for measuring a flow rate of at least one flow path. Means, a vibration detecting means for detecting vibration such as an earthquake, and a control means for processing a signal from the flow rate measuring means and the vibration detecting means and controlling the flow path opening / closing means. And a control unit including a control unit for controlling the flow path opening / closing unit and the measurement control unit based on outputs from the flow rate measuring unit and the vibration detecting unit.

After the vibration detecting means detects the earthquake, the control section closes the flow path opening / closing means other than the flow path provided with the flow rate measuring means, and the measurement control section advances the measurement cycle of the flow rate measuring means and further increases the number of times. Therefore, the accuracy of detecting a small amount of flow during an earthquake can be improved.

The seismic isolation device according to claim 5 of the present invention has a cycle initialization unit for initializing the measurement cycle of the measurement control unit, and measures the flow rate of the flow rate measurement unit when the vibration is detected by the vibration detection unit. It has control means for initializing the cycle.

Since the cycle initializing unit initializes the measurement cycle of the flow rate measuring means, the flow rate can be measured immediately after the occurrence of the earthquake, and the flow path opening / closing means can be shut off.

The seismic isolation device according to claim 6 of the present invention has a cycle changing unit for changing the measurement cycle of the measurement control unit, and when the vibration is detected by the vibration detection unit, the measurement cycle of the flow rate measurement unit is changed. It has variable control means.

When the vibration detecting means detects an earthquake, the cycle changing unit changes the measuring cycle of the flow rate measuring means.
Flow rate measurement can be performed while suppressing the effects of vibration during an earthquake.

According to a seventh aspect of the present invention, there is provided a seismic isolation device, comprising: an integrating section for integrating the measured values of the flow measuring means; a setting storing section for storing a preset flow rate set value; Means for determining the magnitude of the flow rate from the outputs of the means, the setting storage section, and the vibration detecting means, and a control section for controlling the flow rate opening / closing means based on the outputs of the flow rate determining section, the flow measuring means, the timing means, and the vibration detecting means. And control means comprising:

When the vibration detecting means detects an earthquake, the flow rate determining section compares the integrated value of the integrating section with the set value of the setting storage section to determine the flow rate. Even if the instantaneous value fluctuates due to the influence, erroneous shutoff of the flow path opening / closing means can be eliminated.

The seismic isolation device according to claim 8 of the present invention is an average calculating section for calculating a measured average value of the flow rate measuring means for a predetermined time measured by the time measuring means, and a setting for storing a preset flow rate set value. A storage unit, a flow rate determination unit that determines the magnitude of the flow rate from the outputs of the average calculation unit, the flow rate measurement unit, the setting storage unit, and the vibration detection unit; And a control unit for controlling the flow opening / closing means.

When the vibration detecting means detects an earthquake, the flow rate determining section compares the average value of the average calculating section with the set value of the setting storage section to determine the flow rate. Even if the instantaneous value fluctuates under the influence of the above, erroneous shutoff of the flow path opening / closing means can be eliminated.

A seismic isolation device according to a ninth aspect of the present invention measures and measures a plurality of flow paths, a plurality of flow path opening / closing means for respectively opening and closing the flow paths, and a flow rate of at least one flow path. Flow rate output means, time measurement means for measuring time, vibration detection means for detecting vibrations such as earthquakes, and processing of signals from the flow rate output means, vibration detection means, and time measurement means to control the flow path opening / closing means Control means, wherein the control means is a zero point correction unit that stores a flow value when the flow path opening / closing means is closed, a setting storage unit that stores a preset flow rate setting value, and the flow rate measuring means A flow determining unit that determines the magnitude of the flow from the output of the storage unit, a flow opening / closing unit based on the outputs of the flow determining unit, the flow measuring unit, the timing unit, and the vibration detecting unit, and a control unit that controls the zero point correcting unit. Have.

Immediately before the zero point correction unit opens the closed channel opening / closing means by the control means, the zero point correction of the flow rate measurement means is performed. The offset of the flow rate measuring means can be canceled and the measurement accuracy can be improved.

[0041]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a seismic isolation device according to Embodiment 1 of the present invention.

In FIG. 1, reference numerals 1a and 1b denote flow paths for fluid such as gas, and reference numerals 2a and 2b denote flow path opening / closing means such as shut-off valves provided upstream of the flow paths 1a and 1b. Numeral 3 is an ultrasonic flow rate measuring means for measuring the flow rate based on the flow velocity of the fluid flowing through the flow path 1b using an ultrasonic element. Reference numeral 5 denotes vibration detecting means for detecting vibrations such as earthquakes using an acceleration sensor or the like. Reference numeral 4 denotes control means for controlling the opening / closing of the flow path opening / closing means 2a, 2b based on signals from the flow rate measuring means 3 and the vibration detecting means 5. .

Next, the operation and operation will be described. When both of the channel opening / closing means 2a and 2b are open, the channel 1
Fluid flows through the respective flow paths at a ratio determined by the configurations of a and 1b. Since the flow rate measuring means 3 detects the flow rate of the fluid flowing through the flow path 1b, the total flow rate is obtained by multiplying the flow rate value measured by the flow rate measuring means 3 by the flow rate ratio of the flow paths 1a and 1b. For example, if the flow ratio of the flow paths 1a and 1b is 1: 1, the total flow value can be obtained by doubling the flow value measured by the flow measuring means 3.

When two flow paths are used in this way, the measurement range of the flow rate measuring means 3 only needs to be able to measure a flow rate of about 1/2 of the whole. Further, a flow opening / closing means 2
For a and 2b, small ones can be used in proportion to the number of channels. When vibration is detected by the vibration detecting means 5 in such a configuration, a signal to that effect is sent to the control means 4, and the control means 4 uses this signal to switch the flow path opening / closing means 2 a other than the flow path 1 b provided with the flow rate measuring means 3. close. When the flow path opening / closing means 2a is closed, all the fluid passes through the flow path 1b, and the flow rate measuring means 3 measures the total flow rate. After the earthquake,
By measuring the total flow rate by the flow rate measuring means to determine whether or not fluid leakage has occurred due to the earthquake, it is possible to accurately detect even a small flow rate.

(Embodiment 2) FIG. 2 is a block diagram of a seismic isolation device according to Embodiment 2 of the present invention.

In FIG. 2, reference numeral 4c denotes a setting storage unit for storing a preset flow rate set value. Reference numeral 4b denotes a flow rate determining unit for comparing the outputs of the flow rate measuring means 3 and the setting storage unit 4c to determine the magnitude of the flow rate. It is. Reference numeral 6 denotes a time measuring means for measuring time. Reference numeral 4a denotes a flow rate opening / closing means 2a based on outputs of the flow rate determining unit 4b, the flow rate measuring means 3, the time measuring means 6, and the vibration detecting means 5,
2b is a control unit that controls 2b.

Next, the operation and operation will be described. The flow rate value measured by the flow rate measuring means 3 and the flow rate set value stored in the setting storage section 4c in a state in which the control section 4a recognizes that the predetermined time has elapsed based on the time measured by the time measuring section 6. Is determined by the flow rate determining unit that the flow rate value is small, the control unit 4a controls the flow path 1b provided with the flow rate measuring unit 3.
The other channel opening / closing means 2a is closed. When the flow path opening / closing means 2a is closed, all the fluid passes through the flow path 1b, and the flow rate measurement means 3 can accurately measure a small flow rate.

(Embodiment 3) FIG. 3 is a block diagram of a seismic isolation device according to Embodiment 3 of the present invention.

In FIG. 3, reference numeral 4d denotes a first shutoff setting storage unit for storing a flow rate set value when the flow passage opening / closing means 2a, 2b is shut off while the vibration detecting means 5 is detecting the vibration. A second memory for storing a flow rate set value when the flow path opening / closing means 2a, 2b is shut off within a predetermined time measured by the time keeping means 6
This is a cutoff setting storage unit, and the first cutoff setting storage unit 4d stores a larger flow rate set value.

Reference numeral 4a denotes a control section for controlling the flow opening / closing means 2a, 2b based on the outputs of the first cut-off setting storage section 4d, the second cut-off setting storage section 4e, the flow rate measuring means 3, the time measuring means 6, and the vibration detecting means 5. .

Next, the operation and operation will be described. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the flow path opening / closing unit 2a, and then compares the set value stored in the first cutoff setting storage unit 4d with the flow value measured by the flow measuring unit 3. If the flow rate value is large, the flow path opening / closing means 2b is shut off. Then, when the vibration detecting means 5 stops detecting the vibration, the time measuring means 6 starts measuring the elapsed time from that point.
Further, the control unit 4a keeps the second cutoff setting storage unit 4e from the time when the vibration detecting means 5 stops detecting the vibration until a predetermined time elapses.
Is compared with the flow rate value measured by the flow rate measuring means 3. During this time, if the flow rate value is large, the flow path opening / closing means 2b is shut off. As described above, during the earthquake, the threshold value greater than the threshold value for a predetermined period after the earthquake has subsided is compared with the measured flow rate value to determine whether the flow path opening / closing means 2a, 2b is shut off. Can be suppressed.

(Embodiment 4) FIG. 4 is a block diagram of a seismic isolation device according to Embodiment 4 of the present invention.

In FIG. 4, reference numeral 4f denotes a measurement control section for changing the measurement cycle and the number of times of measurement by the flow rate measuring means. Next, the operation and operation will be described. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the channel opening / closing unit 2a.
Then, the measurement control unit 4f advances the measurement cycle of the flow rate measuring unit 3 (for example, changes every 10 seconds to every 1 second), and further increases the number of times of measurement (for example, changes from 1 to 10 times).
As described above, the accuracy of the flow rate measurement can be improved by increasing the number of times the flow rate is measured per unit time after the earthquake.

(Embodiment 5) FIG. 5 is a block diagram of a seismic isolation device according to Embodiment 5 of the present invention.

In FIG. 5, reference numeral 4g denotes a cycle initialization unit for initializing the measurement cycle of the measurement control unit 4f.

Next, the operation and operation will be described. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the flow path opening / closing unit 2a, and the cycle initialization unit 4g initializes the measurement cycle of the measurement control unit 4f. For example, the measurement control unit 4
Assuming that the measurement cycle of f is every 10 seconds, and the vibration detecting means 5 detects the vibration two seconds after the measurement, the next flow rate measurement is not performed until the remaining eight seconds have elapsed. When the flow rate is measured by the control unit 4a and the flow rate is large, the control unit 4a shuts off the flow path opening / closing means 2b after 8 seconds.
This means that, depending on the timing of the vibration detection by the vibration detection means 5, the maximum is delayed by the flow rate measurement cycle (10 seconds in this case). As described above, the vibration detecting means 5 detects the vibration and closes the flow path opening / closing means 2a, and the flow rate is measured immediately after the measurement cycle is initialized, thereby quickly shutting off the flow path opening / closing means 2b when the flow rate is large. be able to.

(Embodiment 6) FIG. 6 is a block diagram of a seismic isolation device according to Embodiment 6 of the present invention.

In FIG. 6, reference numeral 4h denotes a cycle changing unit for changing the measurement cycle of the measurement control unit 4f. Next, the operation and operation will be described. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the channel opening / closing unit 2a. Then, the cycle changing unit 4h randomly changes the flow rate measurement cycle of the measurement control unit 4f. When the vibration detecting unit 5 stops detecting the vibration, the cycle changing unit 4h returns the flow rate measurement cycle of the measurement control unit 4f to a normal cycle (for example, every 10 seconds).

Since the flow rate measurement period during an earthquake is constantly varied in this way, even if the flow rate value of the flow rate measuring means 3 is affected by vibration and its instantaneous value fluctuates, the flow path opening / closing means 2b is erroneously shut off. Can be eliminated.

In this embodiment, the measurement period is varied during an earthquake. However, the period is changed to infinity by the period change unit 4h, and the vibration detecting means 5 detects the vibration, or during the detection + flow measurement during the predetermined time. Is not performed, it is also possible to eliminate the erroneous shutoff of the flow path opening / closing means 2b affected by the vibration.

(Embodiment 7) FIG. 7 is a block diagram of a seismic isolation device according to Embodiment 7 of the present invention.

In FIG. 7, reference numeral 4i denotes an integrating section for integrating the measured values of the flow rate measuring means 3. Next, the operation and operation will be described. When the vibration detecting means 5 detects the vibration, the controller 4a
First, the channel opening / closing means 2a is closed. Then, a signal is sent to the timer means 6 to start measuring the elapsed time since the closing of the channel opening / closing means 2a. Thereafter, the control unit 4a recognizes the elapsed time by referring to the clock unit 6. Further, the flow rate determining unit 4b receives a signal indicating that an earthquake has occurred from the vibration detecting means 5 and outputs a signal for starting integration to the integrating unit 4i, and thereafter stores the integrated value of the integrating unit 4i and the setting storage unit 4c. The control unit 4a compares the set value with the set value until the control unit 4a outputs a signal indicating that a predetermined time has elapsed.
When the predetermined time has elapsed, the flow rate determining unit 4b stops comparing the flow rate with the integrated value of the integrating unit 4i, compares the flow rate measuring unit 3 with the set value stored in the setting storage unit 4c, and determines the magnitude of the flow rate. I do. As described above, when the vibration detecting means detects an earthquake, the flow rate determination unit compares the integrated value of the integration unit with the set value of the setting storage unit to determine the flow rate during a preset period, so that the instantaneous value of the flow measurement value is determined. Even if the flow rate value of the flow rate measuring means is affected by vibration and its instantaneous value fluctuates, it is possible to eliminate erroneous shutoff of the flow path opening / closing means as compared with the case of performing the above.

(Embodiment 8) FIG. 8 is a block diagram of a seismic isolation device according to Embodiment 8 of the present invention.

In FIG. 8, reference numeral 4j denotes an average calculator for calculating the average value of the flow rate measuring means 3. Next, the operation and operation will be described. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the channel opening / closing unit 2a. Then, a signal is sent to the timer means 6 to start measuring the elapsed time since the closing of the channel opening / closing means 2a. Thereafter, the control unit 4a recognizes the elapsed time by referring to the clock unit 6. Further, the flow rate determination unit 4b receives a signal indicating that an earthquake has occurred from the vibration detection unit 5, outputs a signal to start the calculation to the average calculation unit 4j, and thereafter stores the calculated average value of the average calculation unit 4j and the setting storage unit 4c. The control unit 4a compares the set value with the set value until the control unit 4a outputs a signal indicating that a predetermined time has elapsed. When a predetermined time has elapsed, the flow rate determination unit 4b stops comparing the calculated average value of the average calculation 4j with the calculated average value.
The flow rate measuring means 3 is compared with the set value stored in the setting storage section 4c to determine the magnitude of the flow rate. In this way, when the vibration detecting means detects an earthquake,
Since the flow rate determination unit 4b compares the integrated value of the average calculation unit 4j with the set value of the setting storage unit 4c to determine the flow rate, the flow rate value of the flow rate measurement unit 3 is smaller than when the flow rate measurement value is used as an instantaneous value. Even if the instantaneous value fluctuates due to the influence of vibration, it is possible to eliminate erroneous shutoff of the flow path opening / closing means 2b.

(Embodiment 9) FIG. 9 is a block diagram of a seismic isolation device according to Embodiment 9 of the present invention.

In FIG. 9, reference numeral 4k denotes a zero-point correction unit for storing a flow value measured by the flow output means 3 based on a signal from the control unit 4a. Reference numeral 7 denotes a flow rate output means for measuring the flow rate of the fluid flowing through the flow path 1b, adding the flow rate value stored in the zero point correction section 4k from the measured flow rate value, and outputting the result to the flow rate determination section 4b (however, the flow rate output means). The output means 3 measures the flow rate by an ultrasonic method, and the measured flow rate value has both positive and negative signs.

Next, the operation and operation will be described. The flow rate output means 3 adds the flow rate value stored in the zero point correction section 4k from the measured flow rate value and outputs the result to the flow rate determination section 4b. The flow rate value measured by the signal from the section is returned to the zero point correction section. Further, the initial value of the zero point correction unit is zero. When the vibration detecting unit 5 detects the vibration, the control unit 4a first closes the flow path opening / closing unit 2a, and compares the flow rate value output from the flow rate output unit 3 by the flow rate determining unit 4b with the set value stored in the setting storage unit 4c. The magnitude of the flow rate is determined by comparison. If the result of the determination is that the flow rate value is large, the flow path opening / closing means 2b is shut off. Further, the control unit 4a sends a timekeeping start signal to the timekeeping means 6 to start measuring the elapsed time after the passage opening / closing means 2b is shut off. Thereafter, the control unit 4a recognizes the elapsed time by referring to the clock unit 6. Then, the flow rate determining section 4b compares the flow rate value of the flow rate output means 3 with the set value stored in the setting storage section 4c to determine the magnitude of the flow rate. If the flow rate is equal to or less than the set value for a predetermined time measured by the timing means 6, the flow rate determination unit 4b sends a signal to that effect to the control unit 4a, and the control unit 4a sends a signal for zero point correction to the zero point correction unit 4k. . At this time, the channel opening / closing means 2
a and 2b remain closed, the zero point correction unit 4k issues a request for the flow rate value to the flow rate output means 7, and the flow rate measured by the flow rate output means 3 when the flow path opening / closing means 2a and 2b are closed. Store the value. Thereafter, the flow rate output means 3 adds the flow rate value stored in the zero point correction section 4k from the measured flow rate value and outputs the result to the flow rate determination section 4b. In this way, by adding the measured flow rate value when the flow path opening / closing means 2a, 2b is closed to the subsequent measured flow rate value, the flow rate value measured when the flow rate should be originally zero (mainly the flow rate output means 7) The deviation of the circuit-like zero point) can be removed from the subsequent flow measurement values, and the offset of the flow output means 7 can be canceled.

In the present embodiment, the time when the flow rate value is stored in the zero point correction section 4k is detected when an earthquake is detected, the flow path opening / closing means 2a and 2b are shut off, and the flow is performed when the flow returns. A similar effect can be obtained by performing the measurement based on the number of times the flow rate is measured.

[0070]

As described above, the seismic isolation device according to the first aspect of the present invention uses a plurality of flow paths and measures the flow rate of one of the flow paths to reduce the flow rate measuring means. After the occurrence of an earthquake, since the flow paths other than the flow path provided with the flow rate measuring means are closed and the flow rate is measured only with the flow path provided with the flow rate measuring means, the flow rate can be measured with high measurement accuracy. This has the effect.

Further, the seismic isolation device according to the second aspect can improve the accuracy of flow measurement when the flow rate is small, so that it is possible to detect a long-term leak of a minute flow rate.

Further, the seismic isolation device according to claim 3 compares the measured flow rate with a threshold value larger than the threshold value for flow rate determination performed during a predetermined period after the earthquake has subsided during the earthquake, Since the cutoff of the flow passage opening / closing means 2a, 2b is determined, the effect of vibration due to an earthquake can be suppressed.

Further, in the seismic isolation device according to the fourth aspect, after the vibration detecting means 5 detects the earthquake, the control section 4a closes the flow path opening / closing means 2a other than the flow path 1b provided with the flow rate measuring means 3, and performs measurement. Since the control unit 4f hastens the measurement cycle of the flow rate measuring means 3 and further increases the number of times, there is an effect that the accuracy of the flow rate detection at the time of an earthquake can be improved.

Further, in the seismic isolation device according to claim 5, when the vibration is detected by the vibration detecting means 5, the cycle initializing section 4g initializes the measuring cycle of the flow rate measuring means 3, so that immediately after the occurrence of the earthquake. Flow rate measurement means 2a, 2b
There is an effect that can be shut off quickly.

Further, when the vibration detecting means 5 detects a vibration, the seismic isolation device according to the sixth aspect changes the period changing section 4.
Since h changes the measurement cycle of the flow rate measuring means 3, even if the flow rate value of the flow rate measuring means 3 is affected by vibration and its instantaneous value fluctuates, it is possible to eliminate erroneous shutoff of the flow path opening / closing means 2b. effective.

Further, in the seismic isolation device according to claim 7, when the vibration detecting means 5 detects an earthquake, the flow rate determining section 4b compares the integrated value of the integrating section 4j with the set value of the setting storage section 4c to determine the flow rate. In order to perform the determination, even if the flow rate value of the flow rate measuring means 3 is influenced by vibration and the instantaneous value fluctuates, the flow path opening / closing means 2
This has the effect that erroneous shut-off of a and 2b can be eliminated.

Further, in the seismic isolation device according to claim 8, when the vibration detecting means 5 detects an earthquake, the flow rate determination section 4b compares the average value of the average calculation section 4j with the set value of the setting storage section 4c and determines the flow rate. Therefore, even if the instantaneous value of the flow rate value fluctuates due to the influence of the vibration, the erroneous shutoff of the flow path opening / closing means 2a, 2b can be eliminated.

In the seismic isolation device according to the ninth aspect, the zero point correction unit 4k stores the flow rate value measured by the flow rate output means 3 when the flow path opening / closing means 2a, 2b is closed. Since the flow rate output means 3 adds the flow rate value stored in the zero point correction section 4k from the measured flow rate value and outputs the result to the flow rate determination section 4b, the flow rate is measured when the flow rate should originally be zero. The flow rate value (mainly, the deviation of the zero point in the circuit of the flow rate output means 7) can be excluded from the subsequent flow rate measurement values, and the offset of the flow rate output means 7 can be canceled.

[Brief description of the drawings]

FIG. 1 is a block diagram of a seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a seismic isolation device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a seismic isolation device according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a seismic isolation device according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a seismic isolation device according to Embodiment 5 of the present invention.

FIG. 6 is a block diagram of a seismic isolation device according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram of a seismic isolation device according to a seventh embodiment of the present invention.

FIG. 8 is a block diagram of a seismic isolation device according to an eighth embodiment of the present invention.

FIG. 9 is a block diagram of a seismic isolation device according to a ninth embodiment of the present invention.

FIG. 10 is a block diagram of a conventional seismic isolation device.

FIG. 11 is a block diagram of a conventional ultrasonic flow meter.

[Explanation of symbols]

 3 Flow rate measuring means 4 Control means 4a Control section 4b Flow rate determining section 4c Setting storage section 5 Vibration detecting means 6 Clocking means

Claims (9)

[Claims] A plurality of flow paths; a plurality of flow path opening / closing means for respectively opening / closing the flow paths; a flow rate measuring means for measuring a flow rate of at least one flow path; and a vibration detecting vibration such as an earthquake. Detecting means, the flow rate measuring means, a control means for processing the signal from the vibration detecting means and controlling the flow path opening and closing means, when the vibration is detected by the vibration detecting means, the flow rate measuring means by the control means A seismic isolation device that closes the channel opening / closing means other than the provided channel. 2. A plurality of flow paths, a plurality of flow path opening / closing means for respectively opening and closing the flow paths, a flow rate measuring means for measuring a flow rate of at least one flow path, a time measuring means for measuring time, Vibration detecting means for detecting vibrations such as earthquakes, and a control means for processing the signal from the flow rate measuring means, the vibration detecting means, the timing means and controlling the flow rate opening and closing means, wherein the control means is set in advance A setting storage unit for storing the flow rate set value, a flow determining unit for determining the magnitude of the flow rate from the output of the flow measuring unit and the setting storing unit, the flow determining unit, the flow measuring unit, the timing unit, and the vibration detecting unit. And a control unit for controlling the flow opening / closing means based on the output of the sensor. 3. The first control means stores a flow rate set value when the flow path opening / closing means is shut off while the vibration detection means detects vibration.
A shutoff setting storage unit, a second shutoff setting storage unit that stores a flow rate setting value when the flow passage opening / closing unit is shutoff within a predetermined time period counted by the timer unit after the vibration is completed, and the first shutoff setting storage unit. 3. The seismic isolation device according to claim 2, further comprising a second interruption setting storage unit, a flow measurement unit, a vibration detection unit, and a control unit that controls the flow opening / closing unit based on an output from the time measurement unit. 4. A plurality of flow paths, a plurality of flow path opening / closing means for respectively opening and closing the flow paths, a flow rate measuring means for measuring a flow rate of at least one flow path, and a vibration detecting vibration such as an earthquake. A detection means, and a control means for processing the signals from the flow rate measurement means and the vibration detection means and controlling the flow path opening / closing means, wherein the control means controls a measurement cycle and the number of times of the flow rate measurement means And a control unit for controlling the flow path opening / closing means and the measurement control unit based on outputs from the flow rate measuring means and the vibration detecting means. 5. The control means has a cycle initialization part for initializing the measurement cycle of the measurement control part, and when the vibration is detected by the vibration detection means, the measurement cycle of the flow rate measurement means is initialized. The seismic isolation device described. 6. The control means has a cycle changing section for changing the measurement cycle of the measurement control section, and changes the measurement cycle of the flow rate measuring means when the vibration is detected by the vibration detecting means.
The seismic isolation device described. 7. The control means includes an integrating section for integrating the measured value of the flow rate measuring means, a setting storage section for storing a preset flow rate set value, the integrating section, the flow rate measuring means, the setting storing section, and a vibration detecting section. 3. A flow rate judging section for judging a magnitude of a flow rate from an output of the means, and a control section for controlling a flow rate opening / closing means based on outputs of the flow rate judging section, the flow rate measuring means, the timing means, and the vibration detecting means. Seismic isolation device. 8. An average calculating section for calculating a measured average value of the flow rate measuring means for a certain period of time measured by the timer means, a setting storing section for storing a preset flow rate set value, and the average calculating section. A flow rate determining unit that determines the magnitude of the flow rate based on the outputs of the flow rate measuring unit, the setting storage unit, and the vibration detecting unit; and a control unit that controls the flow rate opening / closing unit based on the outputs of the flow rate determining unit, the flow rate measuring unit, and the vibration detecting unit. The seismic isolation device according to claim 2, comprising: 9. A plurality of flow paths, a plurality of flow path opening / closing means for respectively opening / closing the flow paths, a flow rate output means for measuring and measuring a flow rate of at least one flow path, and a timing means for measuring time. And vibration detection means for detecting vibrations such as earthquakes,
The flow rate output means, the vibration detection means, and a control means for processing the signal from the timing means and controlling the flow path opening / closing means, wherein the control means stores a flow rate value when the flow path opening / closing means is closed. A correction unit, a setting storage unit that stores a preset flow rate set value, a flow determination unit that determines the magnitude of the flow rate from the output of the flow measurement unit and the setting storage unit, the flow determination unit, and a flow measurement unit A seismic isolation device comprising: a flow opening / closing unit based on the output of a timing unit and a vibration detecting unit; and a control unit for controlling a zero point correction unit.