Emergency shutoff system using submerged valves

Abstract

To provide an emergency shut-off system using a submergence type valve which facilitates construction, enables installation of constant water or can shorten water failure time, and can easily grasp an operation state at the time of emergency.SOLUTION: An emergency shut-off system using a submergence type valve includes a submergence type valve 2 provided on an outflow port in a pond, an opening / closing device 3 for opening / closing the submergence type valve 2, a control unit 4 for controlling the opening / closing device 3 on the basis of the detection result of an earthquake sensor 33, and a monitoring unit 5 which is connected to management terminals T1 to T5, and monitors the opening / closing state of the submergence type valve 2, closes the submergence type valve 2 on the basis of the detection result of the earthquake sensor 33, and transmits opening / closing information of the submergence type valve 2 to the management terminals T1 to T5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention provides an emergency shutoff system using a submerged valve. Mu Regarding. [Background technology]

[0002] For example, Patent Document 1 describes an emergency shutoff valve installed in a water reservoir. The emergency shutoff valve is connected to a water distribution pipe outside the water reservoir and is electrically connected to a seismic intensity meter and a control panel. The emergency shutoff valve is configured to automatically close in the event of an emergency such as a major earthquake based on a detection signal from the seismic intensity meter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-4924 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are many water reservoirs, reservoirs, etc. that do not have emergency shutoff valves. Installing an emergency shutoff valve in an existing water reservoir, etc., requires cutting the water pipes to install the valve, which requires shutting off the water supply and potentially resulting in cloudy water when the water supply is resumed. Furthermore, installing an emergency shutoff valve requires excavating the outside of the water reservoir, which increases the time and cost required for installation. Furthermore, the emergency shutoff valve disclosed in Patent Document 1 has the problem that, for example, a waterworks manager cannot grasp the operating status of the emergency shutoff valve in real time.

[0005] In consideration of these problems, the present invention provides an emergency shutoff system using a submerged valve that is easy to install, can be installed without interrupting water supply, or can reduce the time for water supply interruption, and can easily grasp the operating state in an emergency. M The purpose is to provide. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a method for treating a waterlogged pond. , underwater work with the valve open A submerged valve, an opening / closing device for opening and closing the submerged valve, and an earthquake sensor or flow sensor a control unit that controls the opening and closing device based on the detection result; Multiple connections over a network a monitoring unit connected to a management terminal and monitoring the open / closed state of the submerged valve; The control unit includes an automatic switch unit that automatically outputs a valve close signal when a detection signal is input from the earthquake sensor or the flow rate sensor, and a manual switch unit that allows an administrator to manually output a valve close signal or a valve open signal; Transmitting the open / close information of the submerged valve to the management terminal When a valve closing signal is output to the opening and closing device, the output valve closing signal is correlated with whether it originates from the earthquake sensor, the flow rate sensor, or the manual switch unit, and output to the monitoring unit. It is characterized by:

[0008] According to the present invention, a submerged valve is used, so it can be installed at the outlet of the pond. This makes construction easy and allows installation without interrupting the water supply or shortening the time it takes for the water to be interrupted. Furthermore, according to the present invention, the manager can receive real-time information on the opening and closing of the submerged valve in an emergency. Furthermore, since the monitoring unit is connected to the management terminal via a network, it is possible to reliably receive information on the opening and closing of the submerged valve no matter where the user is.

[0009] In addition, the submerged valve , work According to the present invention, it is possible to install the valve without interrupting the water supply.

[0010] Also ,before Preferably, the control unit is configured not to open the submersible valve via the network. According to the present invention, it is possible to prevent the submersible valve from being erroneously opened due to a malfunction on the network.

[0011] It is also preferable that the open / closed state of the submerged valve can be viewed from the management terminal via the network.

[0012] According to the present invention, an administrator can grasp the open / closed state of a submerged valve in real time as needed.

[0013] It is also preferable that the control unit and the monitoring unit are provided with a backup power supply for supplying electricity. According to the present invention, the control unit and the monitoring unit can operate even when the normal power supply is cut off due to an earthquake or the like. [Effects of the Invention]

[0015] Emergency shutoff system using submerged valve according to the present invention Mu This makes construction easy, allows installation without interrupting water supply, or shortens the time for water supply interruption, and also makes it easy to grasp the operating state in an emergency. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram showing an emergency shutdown system using a submerged valve according to a first embodiment of the present invention; [Figure 2] 1 is a block diagram showing an emergency shutdown system using a submerged valve according to a first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] [First embodiment] An embodiment of an emergency shutdown system using a submersible valve according to the present invention will be described in detail below with reference to the drawings. As shown in Figure 1, the emergency shutdown system 1 using a submersible valve according to this embodiment (hereinafter simply referred to as the "emergency shutdown system") is a system for securing water in a water reservoir 11 in the event of an emergency such as an earthquake, and automatically closes a submersible valve 2 installed at an outlet in the water reservoir 11 and notifies a management terminal by email or the like that the valve has been closed.

[0018] As shown in FIGS. 1 and 2, the emergency shutdown system 1 includes a submerged valve 2, an opening and closing device 3, a valve control unit 4, a Web monitoring device 5, a network N, and management terminals T1 to T5.

[0019] The submerged valve 2 is attached to an outlet formed at the bottom of the side wall of the water distribution pipe 12 via a single-flange short pipe, which is configured by extending the water distribution pipe 12 into the water distribution reservoir 11. A trumpet nozzle 13 is provided at the tip of the water distribution pipe 12 to take in water via the submerged valve 2. The submerged valve 2 can be operated underwater at all times by painting the outer surface of the main body with, for example, epoxy resin for water supply, and has excellent rust resistance and durability. The submerged valve 2 can be, for example, an internally threaded soft seal valve in which the inner and outer surfaces of the valve box 14 are painted with epoxy resin for water supply, and the surface of the valve body 15 is rubber-lined. It can also be a butterfly valve with a rubber-lined inner surface of the valve box. Furthermore, it can be a gate valve or butterfly valve made of a corrosion-resistant and rust-resistant metal, for example, stainless steel.

[0020] The submerged valve 2 comprises a valve body 14, a valve disc 15, and a valve stem 16. The valve disc 15 is movable in the height direction relative to the valve body 14, fully closed at the lowest end and fully open at the highest end. The tip of the valve stem 16 is connected to a rod 24 (described below), and the rotational drive of the rod 24 is transmitted to the valve stem 16. A male thread is formed on the outer circumferential surface of the valve stem 16. The valve stem 16 is inserted into a female threaded piece (not shown) provided on the valve disc 15, and the female threaded piece and the valve stem 16 are screwed together. This converts the rotational drive of the valve stem 16 into linear drive, and the valve disc 15 moves in the height direction, opening and closing the flow path.

[0021] The submersible valve 2 is installed between the tip of the distribution pipe 12 and the horn outlet (outlet) 13 after the horn outlet 13 installed at the tip of the distribution pipe 12 is removed. This installation work is performed by a diver diving underwater in the distribution reservoir 11. To ensure the safety of workers, this work is performed by slowing down the flow rate at the horn outlet 13 or stopping the flow. This allows the installation of the submersible valve 2 without interrupting the water supply or shortening the time the water supply is interrupted. Furthermore, installing the submersible valve 2 in an open state makes it possible to install the valve without interrupting the water supply or shorten the time the water supply is interrupted.

[0022] Although the present embodiment exemplifies the distributing reservoir 11, the present invention can be applied to facilities that can store water, such as a balancing reservoir or a filtration reservoir.

[0023] As shown in FIG. 1, the opening and closing device 3 is a device that opens and closes the submerged valve 2. The opening and closing device 3 is installed above (above ground) the distributing reservoir 11. The opening and closing device 3 is electrically connected to the valve control unit 4 shown in FIG. 2. The opening and closing device 3 includes an opening and closing device main body 21, a handle 22, an opening and closing device shaft 23, and a rod 24. The opening and closing device main body 21 includes a motor M, and is configured so that the motor M rotates forward and backward based on a valve close signal or a valve open signal from the valve control unit 4. The opening and closing device shaft 23 is connected to the output shaft of the motor M and extends downward from the bottom of the opening and closing device main body 21. The rod 24 is a rod-shaped member that connects the opening and closing device shaft 23 and the valve rod 16. The rod 24 is arranged vertically inside the distributing reservoir 11. The rotational drive of the opening and closing device 3 is transmitted to the valve rod 16 via the opening and closing device shaft 23 and the rod 24.

[0024] If the installation dimensions are short, the opening / closing shaft 23 can be extended without using the rod 24.

[0025] The handle 22 is provided on the opening / closing device main body 21 and is a member for manually opening and closing the submerged valve 2. The handle 22 is connected to the opening / closing device shaft 23, and is configured so that the rotational force of the handle 22 is transmitted to the opening / closing device shaft 23. In other words, by operating the handle 22, the submerged valve 2 can also be closed or opened.

[0026] As shown in FIG. 2, the valve control unit 4 is a component that controls the opening and closing operation of the opening and closing device 3. The valve control unit 4 is provided in a control panel 31 that is installed above or adjacent to (on the ground) the distributing reservoir 11. As shown in FIG. 2, the control panel 31 is equipped with a valve control unit (control unit) 4, a web monitoring device (monitoring unit) 5, and an earthquake sensor 33. In addition, the control panel 31 is equipped with a flow rate sensor 34 (see FIG. 1) that detects the flow rate of the distributing reservoir 11, outside the control panel 31. In addition to a power source that supplies electricity to the valve control unit 4, web monitoring device 5, earthquake sensor 33, etc., the control panel 31 is equipped with a backup power source that supplies electricity to at least the valve control unit 4 and web monitoring device 5 in an emergency. A water level sensor 35 is also provided in the reservoir.

[0027] The valve control unit (control unit) 4 is electrically connected to the earthquake sensor 33 and the flow rate sensor 34. The earthquake sensor 33 is a device that measures seismic intensity. The earthquake sensor 33 is installed, for example, inside the housing of the operation panel 31. The earthquake sensor 33 is configured to output a detection signal to the valve control unit 4 when it determines that the detection result exceeds a threshold set in advance by the earthquake sensor 33 (for example, when it detects a seismic intensity of 5 or higher).

[0028] The flow rate sensor 34 is installed in the distribution pipe 12 or the outflow pipe near the outlet, and is a device that measures the flow rate of the distributing reservoir 11. The flow rate sensor 34 is configured to output a detection signal to the valve control unit 4 when it determines that the detection result is outside a range preset by the flow rate sensor 34 (for example, in the case of an excessive flow rate abnormality).

[0029] The valve control unit 4 is equipped with a shutoff valve control circuit including an automatic switch unit 4a, a manual switch unit 4b, etc. The valve control unit 4 is configured so that when a detection signal is input from the earthquake sensor 33, the automatic switch unit 4a is activated and outputs a valve close signal to the opening and closing device 3. The valve control unit 4 is also configured so that when a detection signal is input from the flow rate sensor 34, the automatic switch unit 4a is activated and outputs a valve close signal to the opening and closing device 3. When an administrator manually switches the manual switch unit 4b on the operation panel 31 (for example, by pressing the valve close button or the valve open button), the valve control unit 4 outputs a valve close signal or a valve open signal to the opening and closing device 3. In other words, the automatic switch 4a and the manual switch 4b function as selection switches, with the automatic switch 4a normally kept on and the manual switch 4b turned on when performing a valve opening operation or a forced shutoff operation.

[0030] Furthermore, when the valve control unit 4 outputs a valve close signal or a valve open signal to the opening / closing device 3, the valve control unit 4 is configured to output the valve close signal or the valve open signal to the Web monitoring device 5. At this time, the valve control unit 4 is configured to associate whether the output valve close signal or valve open signal originated from the earthquake sensor 33, the flow rate sensor 34, or the manual switch unit 4b, and output the associated information to the Web monitoring device 5. Furthermore, the valve control unit 4 may be provided with a display unit (monitor, etc.) on the operation panel 31 that allows the open / close information of the submerged valve 2 to be visually confirmed.

[0031] The Web monitoring device (monitoring unit) 5 is a device that allows an administrator to view the open / closed state of the submerged valve 2 on the Web. In addition, the Web monitoring device 5 is a device that notifies (by sending an email, displaying on a screen, etc.) the management terminals T1 to T5 when a valve close signal is output from the valve control unit 4 to the opening / closing device 3.

[0032] The Web monitoring device 5 is composed of a control unit (PLC: Programmable Logic Controller), a memory unit (SDCard), a router, a communication antenna, input / output circuits, etc. The control unit is equipped with a remote monitoring image generation unit 5a. The remote monitoring image generation unit 5a generates remote monitoring images on the Web based on the open / close information of the submersible valve 2, measurement data from the earthquake sensor 33, measurement data from the flow sensor 34, etc. The administrator can view the remote monitoring images generated by the remote monitoring image generation unit 5a by accessing a predetermined site via the network N from the management terminals T1 to T5. The remote monitoring images are designed to visually display the open / close information (open / close state) of the submersible valve 2 and measurement data, etc., using graphs and graphics. The open / close information (open / close state) of the submersible valve 2 can be recognized from the most recent valve close or open signal sent from the valve control unit 4 (the valve is in the open state at the initial installation stage).

[0033] The memory unit is a part that stores measurement data measured by the earthquake sensor 33 and the flow rate sensor 34, and opening / closing information of the submersible valve 2 in association with date and time. The memory unit also stores a program for executing the remote monitoring image generation unit 5a.

[0034] Management terminals T1 to T5 are connected to a web monitoring device 5 via a network N. The network N is, for example, the Internet, a telephone communication network, etc. Management terminals T1 and T2 are, for example, personal computers or smartphones owned by administrators. Management terminals T3 to T5 are, for example, terminals connected to a dedicated communication network owned by an organization S, such as a company or government office.

[0035] Next, an emergency shutdown method using a submerged valve according to the present invention (hereinafter simply referred to as the "emergency shutdown method") will be described. The emergency shutdown method according to this embodiment includes a seismic intensity measurement step, a valve closing step, and a transmission step.

[0036] The seismic intensity measurement process is a process of measuring the seismic intensity of an earthquake. In this embodiment, the measurement can be performed using an earthquake sensor 33. The measurement data is transmitted to the Web monitoring device 5. In this embodiment, a flow rate sensor 34 is also provided, and the measurement data measured by the flow rate sensor 34 is also transmitted to the Web monitoring device 5.

[0037] The valve closing process is a process of closing the submerged valve 2. When a detection signal is input from the earthquake sensor 33 or the flow rate sensor 34, the valve control unit 4 outputs a valve closing signal to the opening and closing device 3. When the valve closing signal is input, the opening and closing device 3 drives the motor M, and closes the flow in the water distribution pipe 12 with the valve body 15 via the opening and closing shaft 23 and rod 24. The valve control unit 4 also associates the valve closing signal with the date and time and the source of the signal (earthquake sensor 33, flow rate sensor 34, or manual switch unit 4b), and outputs them to the web monitoring device 5.

[0038] The transmission process is a process of reporting the open / close information of the submersible valve 2 to management terminals T1 to T5, whose contact information, such as email addresses, has been preset, via the Web monitoring device 5 and the network N. The reporting process can be performed by using a communication means, such as email or LINE, to send the information to the management terminals T1 to T5. Any means may be used for the reporting process, as long as the information that the valve has been closed is communicated to the manager in text or an image. For example, if the information is derived from the earthquake sensor 33, it is preferable that the information to be reported includes the open / close information (that the submersible valve 2 has been urgently closed due to an earthquake), measurement data from the earthquake sensor 33, and basic information about the reservoir 11 (such as name, address, and telephone number).

[0039] Furthermore, if the transmitted information is derived from the flow sensor 34, it is preferable that it includes, for example, opening / closing information (the submersible valve 2 was closed urgently due to excessive flow or abnormal water level), measurement data from the flow sensor 34, and basic information about the water reservoir 11 (name, address, telephone number, etc.). In addition, if the transmitted content originates from the manual switch unit 4b, it is preferable that it includes opening / closing information (that the valve has been closed by the manual switch unit 4b) and basic information about the water reservoir 11 (name, address, telephone number, etc.).

[0040] If it is desired to open the submerged valve 2 again after outputting a valve close signal to close the valve, the administrator can operate the manual switch section 4b of the operation panel 31 to output a valve open signal to the opening and closing device 3. This will open the submerged valve 2 again. Alternatively, the administrator may open the valve by rotating the handle 22 of the opening and closing device 3. In other words, in the emergency shutoff system 1 according to this embodiment, the valve opening process can only be performed manually (by hand) and cannot be performed automatically via the network N.

[0041] The emergency shutoff system 1 and emergency shutoff method using a submersible valve described above uses a submersible valve 2 that can be installed inside the distributing reservoir 11, so the submersible valve 2 can be installed in the distributing pipe 12 and trumpet outlet 13 inside the distributing reservoir 11 without interrupting the water supply. This reduces construction costs. In addition, there is no need to install a valve chest or the like, which further reduces construction costs.

[0042] Furthermore, according to this embodiment, the administrator can receive information that the submersible valve 2 has been closed in an emergency in real time via email or the like via the Web monitoring device 5 and the network N. Furthermore, the email or the like contains information about the cause of the emergency closure of the valve (earthquake, flow rate or water level, manual switch unit 4b), measurement data, etc., allowing the administrator to quickly collect information.

[0043] Furthermore, the valve control unit (control unit) 4 according to this embodiment is configured not to perform the opening operation of the submerged valve 2 via the network N. This makes it possible to prevent the submerged valve 2 from being erroneously opened due to a malfunction on the network N.

[0044] Furthermore, in this embodiment, since a Web monitoring device (monitoring unit) 5 is provided, it is possible to view the open / close information (open / close state) of the submersible valve 2 by accessing a predetermined site from the management terminals T1 to T5 via the network N. Furthermore, in this embodiment, the Web monitoring device 5 makes it possible to grasp the open / close state of the submersible valve 2 and the measurement data of the earthquake sensor 33 and the flow rate sensor 34 in real time.

[0045] It also has a backup power supply that supplies electricity to the valve control unit (control unit) 4 and the web monitoring device (monitoring unit) 5. This allows them to operate even when the normal power supply is cut off due to an earthquake or other reason.

[0046] Although the embodiment of the present invention has been described above, appropriate design changes are possible within the scope of the present invention. For example, although the Web monitoring device (monitoring unit) 5 is provided on the operation panel 31, it may also be provided on the cloud. Also, although the embodiment uses the Web, it may also use email. In this case, information such as valve closure may be converted into text and transmitted from the monitoring unit. Furthermore, an alarm unit may be provided on the operation panel 31, and the alarm unit may sound or display an alarm when the submersible valve 2 is closed based on the detection signals of the earthquake sensor 33 and the flow rate sensor 34. Furthermore, in this embodiment, when the submersible valve 2 is closed based on the detection signals of the earthquake sensor 33 and the flow rate sensor 34, a notification is sent to the management terminals T1 to T5 by email or the like, but a notification may also be sent by email or the like when the submersible valve 2 is opened.

[0047] Furthermore, maintenance information for the opening and closing device 3 and the valve control unit 4 may be transmitted from the Web monitoring device 5 to the management terminals T1 to T5. Furthermore, the monitoring unit may be constructed by appropriately combining a PLC (programmable logic controller), an HMI (human machine interface), dedicated hardware, dedicated applications, etc.

[0048] Furthermore, although this embodiment transmits information to the management terminal via the Web or a network, information from the monitoring unit may also be transmitted directly to the management terminal via wireless communication, and specific low-power transceivers, simple business radio equipment, etc. may be used. [Explanation of symbols]

[0049] 1. Emergency shutoff system using submerged valves 2 Submerged valve 3 Switchgear 4 Valve control section (control section) 5 Web monitoring device (monitoring section) 11 Water distribution reservoir (pond) 31 Control panel 33 Earthquake Sensor 34 Flow sensor N Network T1~T5 Management terminal

Claims

1. a submerged valve installed in an open state by underwater work at an outlet in the pond; an opening and closing device for opening and closing the submerged valve; a control unit that controls the opening and closing device based on the detection result of the earthquake sensor or the flow rate sensor; a monitoring unit connected to a plurality of management terminals via a network to monitor the open / closed state of the submerged valve; The control unit includes an automatic switch unit that automatically outputs a valve close signal when a detection signal is input from the earthquake sensor or the flow rate sensor, and a manual switch unit that allows an administrator to manually output a valve close signal or a valve open signal, and transmits open / close information of the submerged valve to the management terminal, An emergency shutoff system using a submerged valve, characterized in that when a valve closing signal is output to the opening and closing device, the system outputs to the monitoring unit whether the output valve closing signal originates from the earthquake sensor, the flow sensor, or the manual switch unit.

2. 2. The emergency shutoff system using a submerged valve according to claim 1, wherein the submerged valve is a gate valve.

3. An emergency shut-off system using a submersible valve as described in claim 1 or claim 2, characterized in that the control unit is configured so as not to perform the opening operation of the submersible valve via the network.

4. 4. An emergency shutdown system using a submerged valve according to claim 1, further comprising a backup power supply that supplies electricity to the control unit and the monitoring unit.

Images