JP3855445B2 - Seismic cutoff device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic sensing interrupting device having a safety function for detecting seismic motion or the like and closing a flow path such as a gas pipe.
[0002]
[Prior art]
Conventionally, this type of control device has been known as disclosed in JP-A-8-271295. It will be described below with reference to FIG. 4 for instructions.
[0003]
As shown in FIG. 4 , the main supply path 1, the sub supply path 2, the flow rate detector 3 provided in the sub supply path 2, and the valve body that blocks or blocks the flow path provided in the main supply path 1. 4, a manual operation unit 5 for operating the valve body 4, and a seismic sensing unit 7 that receives vibration of a seismic intensity of a predetermined level or higher and releases the holding of the manual operation unit 5 by the locking unit 6. . Here, 8 is an urging unit that applies an urging force to the manual operation unit, and 9 is a valve body that blocks or opens the merging flow path of the main supply path and the sub supply path.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional technique, there is no valve body that closes only the sub supply path 2 for measuring the flow rate, and thus there is a problem that the accuracy of the zero flow rate detection of the flow rate detection unit 3 cannot be confirmed. That is, in order to close the sub supply path 2 , the valve body 9 must be closed, and the supply of gas must be stopped, and there is a problem that the use of gas must be temporarily stopped. .
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a plurality of flow paths, a flow rate measuring means provided in at least one of the flow paths, and a flow path opening / closing means for freely opening and closing each of the flow paths. Vibration detecting means for detecting vibration such as an earthquake, abnormality determining means for determining whether or not the signal of the vibration detecting means is abnormal, and the flow rate measuring means when the abnormality determining means determines that the abnormality is detected It was set as the structure provided with the opening-and-closing control means which closes flow paths other than a flow path with the said flow-path opening / closing means .
[0006]
According to the above invention, the abnormality determination unit determines whether the vibration level is equal to or higher than the predetermined vibration level and whether or not the earthquake is moving, and closes the flow path that does not include the flow rate measuring unit only when a large earthquake motion occurs. The power consumption can be reduced by improving the measurement accuracy and reducing the number of measurements .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention detects a vibration such as an earthquake, a plurality of flow paths, a flow rate measuring means provided in at least one of the flow paths, a flow path opening / closing means for freely opening and closing each of the flow paths. Vibration detecting means, an abnormality determining means for determining whether or not the signal of the vibration detecting means is abnormal, and an opening / closing control means for closing the flow path by the flow path opening / closing means when the abnormality determining means determines that it is abnormal. Equipped with . And by adjusting and closing the flow path with the flow channel opening / closing means of the flow path provided with the flow measurement means, the flow rate can be made zero, and the measurement accuracy of the flow measurement means is confirmed in the zero flow state Therefore, even when a sudden abnormality occurs, the flow rate measurement accuracy is always confirmed, and high-accuracy flow rate monitoring can be performed.
[0008]
In addition, a plurality of independent channel opening / closing means are provided in one channel. By using a plurality of channel opening / closing means for each channel, each channel opening / closing means can be opened / closed with a small force when the channel is opened / closed. Can be configured.
[0009]
Further, the flow path not provided with the flow rate measuring means is provided with a plurality of flow path opening / closing means. And by adjusting the number of opening and closing of the plurality of channel opening and closing means for the channel not equipped with the flow rate measuring means, it is possible to adjust the flow rate to flow to the flow path provided with the flow rate measuring means, and to improve the flow rate measurement accuracy It can always be maintained accurately.
[0010]
Further, the flow rate measuring means is arranged between the vibration detecting means and the flow path opening / closing means. The vibration detection means can be moved away from the flow path opening / closing means, and the influence of the operation vibration of the flow path opening / closing means can be reduced to detect the vibration with high accuracy.
[0011]
In addition, each channel opening / closing means provided in each of the plurality of channels has a configuration in which the opening and closing directions are installed in directions facing each other. And when opening and closing the facing channel opening and closing means at the same time, the opening direction or closing direction is opposite to each other, and it is possible to cancel the vibrations and reduce the influence of the operating vibration on the vibration detecting means with high accuracy. Vibration detection can be performed.
[0012]
Moreover, it was set as the structure provided with the measurement flow path which provided the flow volume measurement means, the other bypass flow path, and the measurement flow path in the inner peripheral side of the said bypass flow path. Then, the measurement flow path is covered by the bypass flow path, and the flow rate can be accurately measured without affecting the shape of the measurement flow path even when deformed by an impact from the outside of the apparatus.
[0013]
Also, a base means for connecting to an external pipe, a fixing means for connecting the inlet and outlet flow paths of the flow path to the base means and fixing the inlet flow path and the outlet flow path integrally, and the base The fixing means is sandwiched between the means and the flow path. And, by providing a fixing means between the flow path and the cap means, it is possible to prevent the deformation of the flow path even if an excessive force is applied at the time of fixing, and to prevent the influence on the flow measuring means. be able to.
[0014]
Moreover, the opening part of a nozzle | cap | die means and the connection flow path connected to the inlet flow path and flow path of the flow path which provided the flow volume measurement means were equipped with the curved flow path. And since the fluid flows from the opening of the mouthpiece means to the flow rate measuring means via the curved flow path, it is possible to prevent dust and the like from entering the flow path provided with the flow rate measuring means. The accuracy and durability of flow measurement can be improved.
[0015]
Further, the flow rate measuring means is configured to use ultrasonic flow rate measuring means. By using an ultrasonic flow rate measuring means, an instantaneous flow rate can be detected, the flow rate can be measured immediately after the occurrence of earthquake motion, and a disaster can be prevented.
[0016]
The flow path opening / closing means uses a motor-type opening / closing cutoff valve. And by using a motor type on-off valve, vibration at the time of opening and closing can be reduced, the influence on the vibration detecting means can be suppressed, and vibration measurement can be performed with high accuracy.
[0017]
The vibration detection means is configured as a three-dimensional vibration acceleration detection means. Then, by detecting the vibration acceleration, it is possible to accurately determine whether the earthquake is moving by detecting the vibration acceleration, and by detecting the minute operation vibration of the flow path opening / closing means, the flow path opening / closing means It is possible to confirm that the operation is normally performed.
[0018]
Further, the abnormality determination means is configured to determine whether the vibration level is equal to or higher than a predetermined vibration level and whether the earthquake is moving. And only when there is a large earthquake motion, it is possible to measure the minute flow rate by closing the flow path that is not equipped with flow rate measurement means, and it is possible to reduce power consumption by improving measurement accuracy and reducing the number of measurements. .
[0019]
Moreover, it was set as the structure which used the battery as a drive power supply. And since it is set as the some flow path open | release means, it can be operated also with a battery by operating one by one with small electric power.
[0020]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0021]
(Example 1)
FIG. 1 is a configuration diagram showing the configuration of the seismic shock interrupter according to Embodiment 1 of the present invention. In FIG. 1, an ultrasonic flow measurement unit 10 as a flow measurement means, a measurement flow channel 11 provided with the ultrasonic flow measurement unit 10, and a bypass flow channel 12 without the ultrasonic flow measurement unit 10 A measurement motor valve 13 as a flow path opening / closing means for freely opening and closing the flow state of the measurement flow path 11, and a bypass motor valve 14 as a flow path opening / closing means for freely opening and closing the flow state of the bypass flow path 12 , 15, a vibration acceleration detection unit 16 that detects vibration acceleration in a three-dimensional direction as a vibration detection unit that detects vibration such as earthquake motion, and an abnormality determination unit that determines whether or not the signal of the vibration acceleration detection unit 16 is abnormal When the abnormality determination unit 17 determines that the abnormality is not normal, the measurement flow path 11 and the bypass flow path 12 are closed by the measurement motor valve 13 and the bypass motor valves 14 and 15 , respectively. An opening / closing control unit 18 as an opening / closing control means for stopping is provided.
[0022]
The bypass motor valves 14 and 15 provided in the bypass flow path 12 and the measurement motor valve 13 provided in the measurement flow path 11 are installed so that the opening and closing directions face each other, and the U-shaped measurement is performed. The channel 11 is configured to be provided on the inner peripheral side of the U-shaped bypass channel 12. In addition, it has a base 19 as a base means for connecting to an external pipe 18, a fixed header portion 22 as a fixing means for fixing the inlet flow path 20 and the outlet flow path 21 of the bypass flow path 12 together, and a measurement flow Similarly, the inlet channel 23 and the outlet channel 24 of the path 11 were fixed to the fixed header portion 22. Further, the fixed header portion 22 is sandwiched between the base 19 and each flow path. In addition, the opening 25 of the base 19 and the connection flow path 26 connected to the inlet flow path 23 and the outlet flow path 24 of the measurement flow path 11 are bent flow paths provided with a bent portion 27. Here, 28 is a stepping motor, 29 is a battery as a power source for driving the respective parts, and 30 is an exterior case. And the electrical wiring from the battery to each part is omitted, and arrows indicating some connections are drawn outside the outer case, but this is for easy understanding, with wiring inside. is there.
[0023]
Next, operation | movement and an effect | action are demonstrated using FIG. 2 and FIG. As shown in FIG. 2, the seismic isolation device of the present invention reliably creates a zero flow rate state in the measurement flow path 11 by closing the flow of the flow path with the measurement motor valve 13 of the measurement flow path 11. be able to. Then, the flow rate is measured in the state of zero flow rate, whether the measured value is zero or not is compared, and the measurement adjustment can be performed so that the measured value can be corrected using a correction coefficient or the like. Therefore, when the flow rate is low or periodically, a zero state can be created and the measurement accuracy of the zero flow rate can be checked frequently, so even if a sudden abnormality occurs, the flow rate is always measured with high measurement accuracy until the flow rate is low. it can.
[0024]
In addition, as shown in FIG. 1, since two bypass motor valves 14 and 15 are provided independently in one bypass flow path 12, the area of each valve can be reduced, and the valve can be operated with a small force when opening and closing the flow path. Can be opened and closed. Therefore, power consumption for driving the valve can be reduced, and the valve can be reduced in size and can be configured in a space-saving manner. In addition, since the power consumption is low, the battery can be operated. As shown in FIG. 3, by adjusting the number of opening and closing of the two bypass motor valves 14 and 15 , the flow rate flowing to the measurement flow path 11 provided with the flow rate measurement means can be adjusted, and the flow rate measurement accuracy Can always be maintained with high accuracy. That is, when the measured flow rate Q is less than the predetermined flow rate Q3, both the bypass motor valves 14 and 15 are closed and all flow into the measurement flow path, so that the flow rate is increased and the accuracy of ultrasonic flow measurement is improved. To do. When the flow rate is large, both the bypass motor valves 14 and 15 are opened, and the flow is divided into the bypass flow channel 12 and the measurement flow channel 11 , whereby the pressure loss of the flow channel can be reduced. In addition, at the intermediate flow rate Q1 to Q2, only one bypass motor valve 14 and 15 is closed so that the flow rate can be measured with high accuracy. In addition, since it is a motor type on / off shut-off valve, the degree of opening and closing can be adjusted freely, and when the flow rate is from Q2 to Q3, the flow rate flowing to the measurement channel can be finely adjusted, so that the measurement accuracy can be further improved. .
[0025]
In addition, as shown in FIG. 1, by adopting a configuration in which the ultrasonic flow measuring unit 10 is arranged between the vibration acceleration detecting unit 16, the bypass motor valves 14 and 15, and the measurement motor valve 13, the vibration acceleration can be achieved. The detection unit 16 can be moved away from each of the valves 13 , 14 , and 15 , and it is possible to reduce the vibration during the operation of each of the valves 13 , 14 , and 15 from being transmitted to the vibration acceleration detection unit 16 . Therefore, it is possible to measure and detect vibration acceleration with little noise.
[0026]
Further, the bypass motor valves 14 and 15 and the measuring motor valve 13 are installed in directions where the opening and closing directions are opposite to each other, so that when opening and closing at the same time, the opening direction or the closing direction is opposite to each other, canceling vibrations. The vibration acceleration detection unit 16 can detect the vibration with high accuracy while reducing the influence of the operation vibration. Space saving can be achieved by arranging the measuring motor valve 13 on the inner periphery of the U-shape.
[0027]
And by providing the measurement flow path on the inner peripheral side of the bypass flow path 12 , the measurement flow path 11 is configured to be covered by the bypass flow path 12 from the outside. The flow rate can be accurately measured without affecting the shape of the measurement channel 11 . In addition, the abnormality determination unit 17, the opening / closing control unit 18, the battery 29, and the like are installed on the inner peripheral side of the U-shaped bypass flow path 12 so as to protect against impact damage from the outside.
[0028]
In addition, a base 19 connected to the external pipe 18 and a fixed header portion 22 requiring a strong wall thickness for fixing the bypass flow path 12 and the measurement flow path 11 integrally are provided between the base 19 and the flow path. The fixed header portion 22 is sandwiched between the two. And by providing a fixed header part between the flow path and the base, even if an excessive force is applied to the base at the time of construction, it is possible to prevent the flow path from being directly deformed, and to the ultrasonic flow measurement unit 10. The influence can be prevented beforehand. Further, by performing an airtight seal between the base 19 and the fixed header portion 22 and between the fixed header portion 22 and each flow path, no leakage occurs even if the outer case 30 is deformed.
[0029]
In addition, the opening of the base and the connection channel 26 connected to the inlet channel 23 and the outlet channel 24 of the flow channel are channels having a bent portion 27. And since fluid flows into the measurement flow path 11 from the opening part of a nozzle | cap | die via a bending part, it prevents that a dust etc. penetrates into the measurement flow path 11 , and the flow volume of the ultrasonic flow measurement part 10 Measurement accuracy and durability can be improved.
[0030]
Since the flow rate measuring means is the ultrasonic flow rate measuring unit 10 , the instantaneous flow rate can be detected, the flow rate can be measured immediately after the occurrence of the earthquake motion, and a disaster can be prevented.
[0031]
In addition, the vibration detection means can be detected in any direction by using the vibration acceleration detection unit 16 that detects three-dimensional vibration acceleration, and has the feature of the vibration waveform in the three-dimensional direction. By determining, it is possible to accurately determine whether or not the earthquake moves. Moreover, it is possible to confirm that the operation of the flow path opening / closing means is normally performed by detecting minute operation vibrations of the flow path opening / closing means by the vibration acceleration detection unit 16 . And since a three-dimensional direction can be detected, it can measure even if it has fallen and installed in which direction. Further, the abnormality determination unit 17 determines whether the vibration level is equal to or higher than a predetermined vibration level and whether or not the earthquake moves, so that only when a large earthquake motion occurs, the bypass flow path 12 that does not include the flow rate measuring unit is closed and the minute flow rate is reduced. The power consumption can be reduced by improving the measurement accuracy and reducing the number of times of measurement.
[0032]
The ultrasonic flow measurement unit 10 , the three-dimensional vibration acceleration detection unit 16 , and the motor type on / off shut-off valves 13 , 14 , and 15 have been described. The speculative fluidic flow meter, the mechanical vibration detection unit, and the solenoid type, respectively. The same applies to the shut-off valve. In addition, this device assumes a seismic shut-off device that has a security function at a large source that supplies gas in an apartment house, etc., but the same effect can be obtained even if it is used for a gas meter installed in each house of an apartment house. can get. Furthermore, in FIG. 1, the vibration acceleration detection unit 16 has been described as being installed on the outer periphery of the U-shaped bypass channel 12 , but by installing it on the inner periphery of the bypass channel 12 , as with other components. Obviously, it can protect against external damage. Furthermore, although the U-shaped flow path has been described, the same effect can be obtained with other flow path shapes such as a U-shape and an L-shape.
[0033]
In this way, it is possible to forcibly create a state where the flow rate is zero, and it is possible to check the measurement accuracy of the flow rate measurement means in the state of zero flow rate, so even when a sudden abnormality occurs, always check the flow rate measurement accuracy The flow rate can be monitored with high accuracy.
[0034]
By using a plurality of channel opening / closing means for each channel, each channel opening / closing means can be opened / closed with a small force when the channel is opened / closed. Can be configured.
[0035]
In addition, by adjusting the number of open / close of a plurality of flow path opening / closing means for a flow path not equipped with flow measurement means, the flow rate flowing to the flow path provided with the flow measurement means can be adjusted, and the flow measurement accuracy can be improved. It can always be maintained accurately.
[0036]
Further, the vibration detecting means can be moved away from the flow path opening / closing means, and the influence of the operation vibration of the flow path opening / closing means can be reduced to detect the vibration with high accuracy.
[0037]
Also, when opening and closing the facing channel opening and closing means at the same time, the opening direction or the closing direction are opposite to each other, so that vibrations can be canceled out, and the influence of operating vibration on the vibration detecting means is reduced and the accuracy is high. Vibration detection can be performed.
[0038]
In addition, the bypass flow path covers the measurement flow path, and the flow rate can be accurately measured without affecting the shape of the measurement flow path even when the apparatus is deformed by an impact from the outside of the apparatus.
[0039]
Further, by providing a fixing means between the flow path and the cap means, it is possible to prevent the deformation of the flow path even if an excessive force is applied during fixing, and to prevent the influence on the flow rate measuring means. be able to.
[0040]
In addition, since fluid flows from the opening of the mouthpiece means to the flow rate measuring means via the curved flow path, dust or the like is prevented from entering the flow path provided with the flow rate measuring means. The accuracy and durability of flow measurement can be improved.
[0041]
In addition, by using ultrasonic flow rate measuring means, an instantaneous flow rate can be detected, the flow rate can be measured immediately after the occurrence of earthquake motion, and a disaster can be prevented.
[0042]
In addition, by using a motor type on-off valve, vibration at the time of opening and closing can be reduced, and the influence on the vibration detecting means can be suppressed and vibration measurement can be performed with high accuracy.
[0043]
Further, by detecting vibration acceleration, it is possible to accurately determine whether or not an earthquake moves by detecting vibration acceleration, and by detecting minute operation vibration of the flow path opening / closing means, the flow path opening / closing means It is possible to confirm that the operation is normally performed.
[0044]
In addition, only when there is a large earthquake motion, it is possible to close a flow path that does not have flow rate measurement means and measure minute flow rates, and to reduce power consumption by improving measurement accuracy and reducing the number of measurements. .
[0045]
Moreover, it can be operated with a battery by operating each one with a small electric power.
[0046]
【The invention's effect】
As described above, according to the vibration detection device of the present invention, the following effects can be obtained.
[0047]
Abnormal determining means at a predetermined vibration level or more and was judged configure whether ground motion or not. And only when there is a large earthquake motion, it is possible to measure the minute flow rate by closing the flow path that is not equipped with flow rate measurement means, and it is possible to reduce power consumption by improving measurement accuracy and reducing the number of measurements. .
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a seismic shock interrupting apparatus according to a first embodiment of the present invention. FIG. 2 is a flowchart showing an operation of the vibration detecting apparatus. FIG. 3 is a flowchart showing an operation of the vibration detecting apparatus. Block diagram showing seismic isolation device [Explanation of symbols]
10 Ultrasonic flow measurement unit (flow measurement means)
11 Measurement channel (channel)
12 Bypass channel (channel)
13 Measuring motor valve (channel opening / closing means)
14, 15 Bypass motor valve (channel opening / closing means)
16 Vibration acceleration detector (vibration detector)
17 Abnormality determination unit (abnormality determination means)
18 Open / close control unit (open / close control means)
19 Base (base means)
20, 23 Inlet channel 21, 24 Outlet channel 22 Fixed header portion (fixing means)
25 Opening 26 Connection flow path 27 Bent part (bent flow path)

Claims (13)

A plurality of flow paths, a flow rate measuring means provided in at least one of the flow paths, a flow path opening / closing means provided in each flow path for freely opening and closing the flow paths, and detecting vibrations such as earthquakes A vibration detecting means for performing the operation, a abnormality determining means for determining whether or not the signal of the vibration detecting means is abnormal, and a flow path other than the flow path provided with the flow rate measuring means when the abnormality determining means determines that the flow is abnormal. A seismic isolation device comprising an opening / closing control means for closing by the flow path opening / closing means .   The seismic isolation device according to claim 1, further comprising a plurality of channel opening / closing means independent of one channel.   The seismic isolation device according to claim 1 or 2, wherein the flow path not provided with the flow rate measuring means includes a plurality of flow path opening / closing means.   The seismic isolation device according to any one of claims 1 to 3, wherein a flow rate measuring means is disposed between the vibration detecting means and the flow path opening / closing means.   The seismic isolation device according to any one of claims 1 to 4, wherein each of the channel opening / closing means provided in each of the plurality of channels is installed in a direction in which the opening and closing directions face each other.   The seismic-sensing cutoff device according to any one of claims 1 to 5, further comprising a measurement channel provided with a flow rate measuring unit, another bypass channel, and a measurement channel on an inner peripheral side of the bypass channel.   A cap means connected to an external pipe, a fixing means for connecting an inlet channel and an outlet channel of the channel to the cap means, and fixing the inlet channel and the outlet channel integrally; and the cap means The seismic isolation device according to any one of claims 1 to 6, wherein the fixing means is sandwiched between the flow paths.   8. The seismic isolation device according to claim 7, wherein the opening of the base means and the connection flow path connected to the inlet flow path and the outlet flow path of the flow path provided with the flow rate measurement means include a curved flow path.   The seismic isolation device according to any one of claims 1 to 8, wherein the flow rate measuring means is an ultrasonic flow rate measuring means.   The seismic isolation device according to any one of claims 1 to 9, wherein the channel opening / closing means uses a motor-type opening / closing cutoff valve.   The seismic isolation device according to any one of claims 1 to 10, wherein the vibration detection means is a three-dimensional vibration acceleration detection means.   The seismic isolation device according to claim 11, wherein the abnormality determination means determines whether or not the vibration is greater than or equal to a predetermined vibration level.   The seismic isolation device according to any one of claims 1 to 12, wherein a battery is used as a driving power source.

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