A one-button linkage control system for emergency shut-off of water, electricity and gas supply

Abstract

This application relates to the fields of public safety and electrical control technology, and in particular to a one-button linkage control system for emergency shut-off of water, electricity and gas supply. The one-button linkage control system includes an emergency triggering unit, a central control unit, a power shut-off execution unit, a water shut-off execution unit, a gas shut-off execution unit, and a reset and authorization unit. The system adopts an integrated design, integrating water, electricity and gas control functions into a single operating platform. In an emergency, after the mechanical self-locking emergency stop button is triggered, the main power supply and water and gas supply will be synchronously shut off in milliseconds. Compared with the traditional multi-point operation mode, it effectively avoids the risk window period caused by operation sequence or omission. Secondly, at the same time as the main power is shut off, the solenoid valve remains closed through physical isolation, so that even if the external power supply is abnormal, it can still maintain a safe state, which can minimize the impact of the emergency.

Description

Technical Field

[0001] This application relates to the fields of public safety and electrical control technology, and in particular to a one-button linkage control system for emergency shut-off of water, electricity and gas supply. Background Technology

[0002] In the field of public safety, places such as schools and chemical laboratories, which are densely populated, have concentrated equipment, and involve multiple supply systems, have become high-risk scenarios for sudden safety accidents due to their complex structures and frequent activities. In such places, in the event of an emergency such as a fire, leak, or explosion, cutting off the supply of water, electricity, and gas simultaneously as soon as possible is a core prerequisite for preventing the further spread of the accident and ensuring the safety of people's lives and property.

[0003] However, current water, electricity, and gas shut-off control solutions on the market are insufficient to fully meet the actual needs of emergency response. In existing systems, the main control switches or valves for water, electricity, and gas are often installed independently, located in scattered locations, and their operation methods vary considerably. In emergencies, on-site personnel need to move between multiple operation points, which not only prolongs the emergency response time but may also lead to the omission of some critical operating steps in the chaos, thus creating greater safety hazards.

[0004] For buildings that have already been built and put into use, upgrading the originally scattered water, electricity, and gas control terminals to a centralized integrated control system often faces problems such as high difficulty in renovation, long construction period, and high construction cost. Such renovation projects usually require significant adjustments to the existing structure and pipelines, and may even seriously affect the normal operation of the site, causing many organizations to give up.

[0005] In addition, some of the simplified linkage solutions that have been implemented only achieve linkage at the signal level, failing to fundamentally meet the core needs of emergency response. These solutions have relatively crude control logic designs, lack the ability to make comprehensive judgments on complex scenarios, and have obvious shortcomings in safety redundancy design and system reliability, thus failing to play their due emergency role in real emergency situations.

[0006] Therefore, this application provides a one-button linkage control system for emergency shut-off of water, electricity and gas supply. Summary of the Invention

[0007] The purpose of this application is to solve at least one technical problem raised in the background art.

[0008] This application provides a one-button linkage control system for emergency shut-off of water, electricity and gas supply. The one-button linkage control system includes an emergency triggering unit, a central control unit, a power shut-off execution unit, a water shut-off execution unit, a gas shut-off execution unit, and a reset and authorization unit.

[0009] The emergency triggering unit is used to provide an emergency triggering signal and disconnect the circuit through physical operation;

[0010] The central control unit is connected to the emergency triggering unit and is used to receive signals from the emergency triggering unit and generate control commands based on the signals.

[0011] The power cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off control of the 220V main power supply circuit of the building's main distribution box according to the control commands.

[0012] The water circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of water supply according to the control commands.

[0013] The gas circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of gas supply according to the control commands.

[0014] The reset and authorization unit is connected to the central control unit and is used to reset the system after authorization verification is passed, so as to restore the supply of water, electricity and gas.

[0015] Preferably, the emergency triggering unit includes at least one emergency stop switch, which is a mechanical self-locking mushroom-shaped button with a key reset.

[0016] The formula for the normal circuit conduction of the emergency triggering unit is as follows:

[0017] ;

[0018] The formula for disconnecting the emergency triggering unit's trigger circuit is as follows:

[0019] 0;

[0020] in, This indicates the normally closed contact state of the emergency stop switch: 1 = closed, 0 = open. The power supply status of the central control unit: 1 = powered on, 0 = disconnected.

[0021] Through the above technical solutions, the emergency stop switch ensures the reliability and immediacy of the trigger signal by physically disconnecting the power supply circuit. The mechanical self-locking design prevents unauthorized reset, fundamentally eliminating the risk of system failure due to electronic component failure or program crash. The mechanical self-locking structure ensures that the button remains locked after being triggered and can only be reset by rotating it with a special key, effectively preventing accidental recovery due to accidental contact or vibration.

[0022] Preferably, the central control unit includes a 24V DC switching power supply and an AC contactor KM1;

[0023] The 24V DC switching power supply receives 220V AC power on its input side and outputs 24V DC power on its output side, and the normally closed contact of the emergency stop switch is connected in series in the input circuit.

[0024] The coil of the AC contactor KM1 is electrically connected to the output side of the 24V DC switching power supply and is driven by 24V DC power.

[0025] Through the above technical solution, the central control unit adopts low-voltage DC power supply, which significantly reduces the risk of electrical faults that may be caused by the system under high-voltage environment, while improving response speed and operational safety. The low-voltage DC design further reduces the impact of electromagnetic interference on control signals, ensuring that the AC contactor KM1 can act quickly and reliably when it receives a trigger signal, immediately cutting off the water, electricity and gas supply circuit, and effectively preventing malfunctions caused by power fluctuations or external interference, thereby enhancing the stability and durability of the entire linkage control system.

[0026] Preferably, the power cut-off execution unit is composed of the main contacts of AC contactor KM1, and the main contacts of AC contactor KM1 are connected in series in the 220V main power supply circuit of the building's main distribution box.

[0027] The on / off state formula of the main power supply circuit is as follows:

[0028] ;

[0029] in, This indicates the on / off state of the 220V main power supply circuit. The current state of the KM1 coil of the AC contactor. The main contact action function is a variable.

[0030] Through the above technical solution, the power cut-off execution unit directly controls the main power supply circuit through the main contacts of the AC contactor, realizing millisecond-level power cut-off with rapid and reliable response. The main contacts of the AC contactor KM1 have strong arc-extinguishing capabilities and can safely disconnect the total load current of the building and the expected short-circuit current, so that the total response time from coil de-energization to complete physical disconnection of the main power supply circuit can be controlled within 100 milliseconds, realizing near-instantaneous synchronous cut-off of non-fire protection power supplies.

[0031] Preferably, the water circuit cut-off execution unit includes a water solenoid valve YV1, and the gas circuit cut-off execution unit includes a gas solenoid valve YV2;

[0032] Both the water solenoid valve YV1 and the gas solenoid valve YV2 are normally closed solenoid valves powered by 24V DC. They are normally closed when the power is off and open when the power is on.

[0033] The above technical solution uses a normally closed solenoid valve to ensure that the water and gas supply is automatically cut off in the event of a power failure. Even if the external power supply is abnormal, a safe state can be maintained. The normally closed solenoid valve adopts the working principle of opening when energized and closing when de-energized. Its valve core relies on the pre-compression spring force to automatically reset and tightly cut off the flow channel when the power is lost. This ensures that the water and gas supply will be forcibly cut off whether the system actively triggers an emergency stop or the control circuit loses power due to any reason such as line fault or power abnormality. This ensures a safe state can be maintained in any unexpected situation.

[0034] Preferably, the control circuits of the water solenoid valve YV1 and the gas solenoid valve YV2 are connected in series in series with the normally open contact of the water and gas supply allow relay KA1 and the normally open auxiliary contact of the AC contactor KM1, and then connected to a 24V DC power supply circuit.

[0035] Through the above technical solution, the control circuit of the solenoid valve is designed with a double interlocking mechanism. It can only be opened when the system power supply is normal and in an authorized state, to prevent misoperation. The double interlocking constitutes a rigorous logic circuit. The normally open contact of the water and gas supply permission relay KA1 represents the management authorization state, and the normally open auxiliary contact of the AC contactor KM1 represents the normal state of the main power supply. Only when both of these conditions are met at the same time can the control circuit of the solenoid valve be turned on, which fundamentally prevents the water and gas supply from being accidentally turned on when the system state is unsafe.

[0036] Preferably, the reset and authorization unit includes an authorization switch SA, a reset button SB1, and a water / gas supply enable relay KA1;

[0037] The authorization switch SA, reset button SB1, and water / gas supply enable relay KA1 are connected in series and then connected to the output circuit of the 24V DC switching power supply in the central control unit.

[0038] Through the above technical solution, the reset and authorization unit, through the combination of a key switch and a button, ensures that only authorized personnel can restore the system, thereby improving security. The key switch achieves physical access control, and only administrators with a dedicated key can turn it to the closed position. The reset button requires administrators to perform conscious and continuous operation. The two are connected in series with the relay KA1 coil to form a dual authentication mechanism, ensuring the seriousness and controllability of system recovery operations and effectively preventing unauthorized or erroneous resets.

[0039] Preferably, the formula for the coil energized state of the water and gas supply allowance relay KA1 is as follows:

[0040] ;

[0041] in, For the authorized switch SA state, 1 = closed, 0 = open. The reset button SB1 is in the following states: 1 = closed, 0 = open. This indicates the output voltage status of a 24V DC switching power supply: 1 = normal, 0 = abnormal. To indicate the energized state of the relay KA1 coil for water and gas supply, 1 = energized, 0 = de-energized. The response coefficient of coil KA1;

[0042] The normally open contact of the water and gas supply enable relay KA1 is connected in series in the control circuits of the water solenoid valve YV1 in the water circuit cut-off actuator and the gas solenoid valve YV2 in the gas circuit cut-off actuator.

[0043] Through the above technical solutions and formulaic logic control, the rigor and reliability of the system reset process are ensured, avoiding system recovery caused by unauthorized or erroneous operations. This ensures that every step of the system reset process is necessary and inviolable, and the absence of any single condition will lead to reset failure, thus building a robust security defense at the logical level.

[0044] Preferably, the 220V power supply line of the building's main distribution box passes sequentially through the main air switch QF1 and the main contacts of the AC contactor KM1 of the power cut-off execution unit before returning to the building's main distribution box.

[0045] The above technical solution, using a serial wiring method, eliminates the need to modify the original power distribution circuit, simplifies the installation process, and ensures the immediacy of power disconnection. The non-intrusive modification minimizes the impact on the original power distribution system, making construction simple and fast. Furthermore, since the KM1 main contacts are directly connected in series in the main circuit, its operation can achieve immediate and complete disconnection of power supply to downstream loads.

[0046] Preferably, the water solenoid valve YV1 and the gas solenoid valve YV2 directly replace the original manual ball valves in the building, and the control circuit is connected to the central control unit via a 24V control line.

[0047] Through the above technical solutions, the modular design enables the system to be deployed quickly without damaging the original pipeline structure, reducing the cost of modification and construction period. During the modification, only the front-end valve needs to be closed and the valve body can be replaced quickly one-to-one. The original pipeline layout and support structure remain unchanged. The low-voltage 24V control cable is safe and easy to install. The whole solution has minimal impact on the building foundation structure and normal operation, making it particularly suitable for the rapid and safe upgrade of existing buildings.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. The one-button linkage control system for emergency shut-off of water, electricity and gas supply described in this application adopts an integrated design, integrating water, electricity and gas control functions into a single operating platform. In an emergency, after the mechanical self-locking emergency stop button is triggered, the main power supply and water and gas supply will be synchronously shut off in milliseconds. Compared with the traditional multi-point operation mode, it effectively avoids the risk window period caused by operation sequence or omission. Secondly, at the same time as the main power is cut off, the solenoid valve remains closed through physical isolation, so that even if the external power supply is abnormal, it can still maintain a safe state, which can minimize the impact of the emergency.

[0050] 2. The one-button linkage control system for emergency water, electricity and gas supply cut-off described in this application adopts a modular design concept and can be quickly deployed without damaging the original building structure. By embedding it into the existing distribution box and adapting it to conventional pipeline interfaces, the transformation can be completed in just three simple steps: connecting the control line, replacing the special valve, and setting the authorization mechanism. The entire process does not require the shutdown of related facilities, making it suitable for upgrading the emergency capabilities of old buildings.

[0051] 3. The one-button linkage control system for emergency shut-off of water, electricity and gas supply described in this application prevents unauthorized reset through mechanical self-locking design, ensures basic safety by default closing the solenoid valve when power is off, and manages the recovery process through a dual authorization mechanism. The operator must reset the emergency stop button with a key and the supply can only be restarted after secondary verification by the management personnel, effectively eliminating the risk of accidental activation. The solenoid valve adopts low-power DC drive to avoid equipment damage caused by high-frequency start and stop.

[0052] 4. The one-button linkage control system for emergency shut-off of water, electricity and gas supply described in this application, through localized mechanical triggering and electrical interlocking dual modes, is compatible with building space limitations, improves emergency response efficiency, and, through an audible and visual status feedback mechanism, indicates the system operating status in real time, assisting maintenance personnel in quickly locating anomalies, further ensuring operational safety and system reliability. Attached Figure Description

[0053] Figure 1 This is the system architecture diagram of this application;

[0054] Figure 2 This is a flowchart of the emergency shutdown process in this application;

[0055] Figure 3 This is a flowchart of the system reset process in this application. Detailed Implementation

[0056] The present application will be further described in detail below with reference to the accompanying drawings.

[0057] Example 1, please refer to Figure 1As shown, a one-button linkage control system for emergency shut-off of water, electricity and gas supply includes an emergency triggering unit, a central control unit, a power shut-off execution unit, a water shut-off execution unit, a gas shut-off execution unit, and a reset and authorization unit.

[0058] The emergency triggering unit is used to provide an emergency triggering signal and disconnect the circuit through physical operation;

[0059] The central control unit is connected to the emergency triggering unit and is used to receive signals from the emergency triggering unit and generate control commands based on the signals.

[0060] The power cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off control of the 220V main power supply circuit of the building's main distribution box according to the control commands.

[0061] The water circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of water supply according to the control commands.

[0062] The gas circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of gas supply according to the control commands.

[0063] The reset and authorization unit is connected to the central control unit and is used to reset the system after authorization verification is passed, so as to restore the supply of water, electricity and gas.

[0064] The emergency trigger unit is placed in a prominent and easily accessible location within the premises, such as near the main exit, to ensure that personnel can operate it immediately in an emergency.

[0065] The central control unit is installed in a dedicated control box with a protection level of not less than IP54. The control box is fixed next to the building's main power distribution box or in a well-ventilated and dry equipment room.

[0066] The power cut-off actuator directly acts on the main power supply circuit in the building's main distribution box.

[0067] The water circuit cut-off actuator is installed at a critical node of the building's main water supply pipe, while the gas circuit cut-off actuator is installed near the point where the main gas pipe connects to the building.

[0068] The operating components of the reset and authorization unit and the emergency stop switch of the emergency trigger unit are integrated on the same operating panel for convenient centralized management.

[0069] The units are connected by electrical lines to form a complete linkage control system. In an emergency, personnel only need to operate the emergency stop switch, and the system can simultaneously cut off the supply of water, electricity and gas, achieving a rapid emergency response.

[0070] Example 2, please refer to Figure 1 As shown, the emergency triggering unit includes at least one emergency stop switch, which is a mechanically self-locking mushroom-shaped button with a key reset.

[0071] The formula for the normal circuit conduction of the emergency triggering unit is as follows:

[0072] ;

[0073] The formula for disconnecting the emergency triggering unit's trigger circuit is as follows:

[0074] 0;

[0075] in, This indicates the normally closed contact state of the emergency stop switch: 1 = closed, 0 = open. The power supply status of the central control unit: 1 = powered on, 0 = disconnected.

[0076] Through the above formula and The use of 0 ensures that the system is in a ready state only when the emergency stop switch is not triggered and the power supply is stable. The logic definition used guarantees the reliability of the system's normal operation from the source, avoids misjudgment of the system due to the abnormal state of a single component, and lays a stable foundation for rapid response in subsequent emergency triggering.

[0077] It ensures that the physical operation of the emergency stop switch can be directly converted into an electrical signal that disconnects the circuit, realizing a rigid correlation between the triggering action and the circuit state. This avoids interference from electronic component failures or program anomalies on the triggering signal, ensuring the immediacy and reliability of circuit disconnection in emergency situations. From the electrical logic level, it implements the safety protection function of the mechanical self-locking emergency stop button and prevents risks caused by unauthorized reset.

[0078] The normally closed contact of the emergency stop switch in the emergency triggering unit is directly connected in series in the power supply circuit of the central control unit, forming the most reliable triggering path.

[0079] Furthermore, under normal system conditions, the normally closed contact of the emergency stop switch is closed, and the central control unit receives power; when the emergency stop switch is pressed, its normally closed contact is physically opened, and the power supply to the central control unit is cut off.

[0080] The central control unit includes a 24V DC switching power supply and an AC contactor KM1;

[0081] The 24V DC switching power supply receives 220V AC power on its input side and outputs 24V DC power on its output side, and the normally closed contact of the emergency stop switch is connected in series in the input circuit.

[0082] The coil of the AC contactor KM1 is electrically connected to the output side of the 24V DC switching power supply and is driven by 24V DC power.

[0083] The central control unit contains a 24V DC switching power supply and an AC contactor KM1. The 24V DC switching power supply converts the 220VAC mains power to a safe 24VDC, and its input circuit is controlled by the normally closed contact of the emergency stop switch. The coil of the AC contactor KM1 is driven by 24VDC.

[0084] The power cut-off execution unit is composed of the main contacts of AC contactor KM1, which are connected in series in the 220V main power supply circuit of the building's main distribution box.

[0085] The on / off state formula of the main power supply circuit is as follows:

[0086] ;

[0087] in, This indicates the on / off state of the 220V main power supply circuit. The current state of the KM1 coil of the AC contactor. The main contact action function is a variable.

[0088] By using function mapping, the current state of the low-voltage control circuit is precisely bound to the on / off state of the high-voltage main power supply circuit, achieving indirect safety control of the main power supply and ensuring the safety of control operations. Furthermore, by utilizing the electromagnetic action characteristics of the AC contactor, the rapid on / off response of the main power supply circuit is ensured, keeping the total response time from coil de-energization to main circuit disconnection within milliseconds, achieving millisecond-level power cut-off effect, effectively shortening emergency response time and reducing the risk window period.

[0089] The power cut-off actuator is composed of the main contacts of AC contactor KM1, which are connected in series in the 220V main power supply circuit led out from the building's main distribution box. When the KM1 coil is energized, the main contacts close, and the building uses power normally. When the KM1 coil is de-energized, the main contacts open, cutting off the building's main power supply.

[0090] The water circuit cutoff execution unit includes a water solenoid valve YV1, and the gas circuit cutoff execution unit includes a gas solenoid valve YV2.

[0091] Both the water solenoid valve YV1 and the gas solenoid valve YV2 are normally closed solenoid valves powered by 24V DC. They are normally closed when the power is off and open when the power is on.

[0092] The water solenoid valve YV1 and the gas solenoid valve YV2 mentioned above are both normally closed solenoid valves powered by 24V DC. Their state is open when energized and closed when de-energized, ensuring that the water and gas supply to the system can be automatically cut off in the event of power failure.

[0093] Example 3, please refer to Figure 1As shown, the control circuits of the water solenoid valve YV1 and the gas solenoid valve YV2 are connected in series in the normally open contact of the water and gas supply allow relay KA1 and the normally open auxiliary contact of the AC contactor KM1, and then connected to the 24V DC power supply circuit.

[0094] The normally open contact of the water solenoid valve YV1 and the normally open auxiliary contact of the AC contactor KM1 are connected in series in the circuits of both the water solenoid valve YV1 and the gas solenoid valve YV2.

[0095] This ensures that the opening of the solenoid valve requires the system to be in a state where supply is permitted and the main circuit of the system to be powered normally, thus preventing accidental opening of the water and gas supply under abnormal conditions from the circuit level.

[0096] The reset and authorization unit includes an authorization switch SA, a reset button SB1, and a water / gas supply enable relay KA1;

[0097] The authorization switch SA, reset button SB1, and water / gas supply enable relay KA1 are connected in series and connected to the output circuit of the 24V DC switching power supply in the central control unit.

[0098] The authorization switch SA, reset button SB1, and water / gas supply enable relay KA1 are connected in series to the 24V power supply circuit. The KA1 coil will only be energized when the authorization switch SA is closed, the reset button SB1 is pressed, and the 24V power supply output is normal.

[0099] The formula for the coil of the water and gas supply allowance relay KA1 under energized state is as follows:

[0100] ;

[0101] in, For the authorized switch SA state, 1 = closed, 0 = open. The reset button SB1 is in the following states: 1 = closed, 0 = open. This indicates the output voltage status of a 24V DC switching power supply: 1 = normal, 0 = abnormal. To indicate the energized state of the relay KA1 coil for water and gas supply, 1 = energized, 0 = de-energized. The response coefficient of coil KA1;

[0102] During system operation, based on the calculations of the above formula, when the water and gas supply enable relay KA1 is energized, it will drive its normally open contact to close, thereby sending an enable signal to the water and gas supply execution unit to ensure that the water and gas supply pipeline remains unobstructed. When power is lost, the contact will open, immediately cutting off the water and gas supply, thus achieving a rapid response in emergency situations.

[0103] Furthermore, this functional design ensures that the water and gas supply permission relay will only be activated and the water and gas supply restored when authorized personnel perform the standardized operation and the system power supply is normal. This guarantees the seriousness and controllability of the reset operation, and avoids safety risks caused by unauthorized or misoperation through logical quantification. Together with the mechanical self-locking reset and the normally closed design of the solenoid valve, it forms multiple safety protections, further improving the overall reliability of the system.

[0104] Furthermore, the logic design ensures that the system can only be activated when the authorization switch SA is closed, the reset button SB1 is pressed, and the 24V power supply output is normal, effectively preventing misoperation or unauthorized startup.

[0105] Meanwhile, the output status of KA1 is monitored in real time by the central control unit and linked to the control loop of the water and gas valves to ensure the reliability and immediacy of one-button linkage control.

[0106] The normally open contact of the water and gas supply enable relay KA1 is connected in series in the control circuits of the water solenoid valve YV1 in the water circuit cut-off actuator and the gas solenoid valve YV2 in the gas circuit cut-off actuator.

[0107] Example 4, please refer to Figure 1 As shown, the 220V power supply line of the building's main distribution box passes through the main air switch QF1 and the main contacts of the AC contactor KM1 of the power cut-off execution unit in sequence before returning to the building's main distribution box.

[0108] The 220V main power supply control circuit is constructed using a serial wiring method. A power line is led out from the lower end of the main air switch QF1 in the building's main distribution box, passes through the main contacts of the AC contactor KM1, and then returns to the corresponding busbar in the main distribution box.

[0109] The above wiring method does not require modification of the original main circuit structure inside the distribution box, simplifying the installation process.

[0110] The serial wiring method only requires connecting the main contacts of AC contactor KM1 between the output terminal of the main air switch QF1 and the busbar of the building's main distribution box, avoiding the removal or rewiring of the original main line, thus significantly shortening the construction period and reducing the risk of human wiring errors.

[0111] At the same time, it ensures that the system can quickly isolate the power supply in the event of an emergency shutdown, and feeds back the status to the central control unit through the auxiliary contacts of KM1, achieving seamless coordination with the KA1 relay, further improving the overall system's response speed and operational safety.

[0112] During implementation, installers only need to connect external terminals according to standard procedures to complete the integration without the need for professional tools, which greatly simplifies on-site commissioning and maintenance.

[0113] This ensures that the AC contactor KM1 can effectively disconnect and control the building's main power supply without affecting the continuity of the main power supply line. When the system issues an emergency disconnect command, the KM1 coil is de-energized, and its main contacts quickly open, thereby cutting off the 220V AC main power input to the entire building.

[0114] It meets the requirement of quickly cutting off the power supply in emergency situations. Because the main contacts are directly connected in series in the main circuit, the action of KM1 can immediately and reliably interrupt the power supply to all subsequent electrical loads.

[0115] Meanwhile, since the wiring only adds the KM1 main contact link between the main air switch output terminal and the busbar, it minimizes the impact on the original power distribution system layout and facilitates construction and subsequent maintenance.

[0116] The water solenoid valve YV1 and the gas solenoid valve YV2 directly replace the original manual ball valves in the building, and the control circuit is connected to the central control unit via a 24V control line.

[0117] For the modification of water and gas lines, the water solenoid valve YV1 and the gas solenoid valve YV2 can directly replace the original manual ball valves on the pipeline. During installation, simply close the front valve, remove the original manual ball valve, and replace it with the corresponding solenoid valve in the original installation position. The control of the solenoid valve is connected to the central control unit by laying a 24V low-voltage control cable.

[0118] The above method achieves the simplest intervention in the original water and gas pipelines.

[0119] Working principle

[0120] Step 1: The normally closed contact of the emergency stop switch closes, the central control unit is energized, the coil of the AC contactor KM1 is energized, the main contacts close, and the building is powered normally. At the same time, the water and gas supply allowance relay KA1 is energized, its normally open contact closes, the water solenoid valve YV1 and the gas solenoid valve YV2 are energized and opened, and the water and gas supply is normal.

[0121] Step 2: Press the emergency stop button. Its normally closed contact physically disconnects, the central control unit is de-energized, the KM1 coil is de-energized, the main contact opens, and the main power supply to the building is cut off. At the same time, the KA1 coil is de-energized, its normally open contact opens, and the solenoid valves YV1 and YV2 are de-energized and closed, cutting off the water and gas supply.

[0122] Step 3: After the emergency is lifted, the emergency stop switch must be reset with the key first, then the authorization switch SA is closed and the reset button SB1 is pressed. If the 24V power supply is normal, the KA1 coil is energized, its normally open contact is closed, the solenoid valve is energized and opened, and the water and gas supply is restored. At the same time, the KM1 coil is energized, the main contact is closed, and the building power supply is restored.

[0123] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply, characterized in that, The one-button linkage control system includes an emergency triggering unit, a central control unit, a power cut-off execution unit, a water circuit cut-off execution unit, a gas circuit cut-off execution unit, and a reset and authorization unit; The emergency triggering unit is used to provide an emergency triggering signal and disconnect the circuit through physical operation; The central control unit is connected to the emergency triggering unit and is used to receive signals from the emergency triggering unit and generate control commands based on the signals. The power cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off control of the 220V main power supply circuit of the building's main distribution box according to the control commands. The water circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of water supply according to the control commands. The gas circuit cut-off execution unit is connected to the central control unit and is used to receive control commands and realize the on / off of gas supply according to the control commands. The reset and authorization unit is connected to the central control unit and is used to reset the system after authorization verification is passed, so as to restore the supply of water, electricity and gas.

2. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 1, characterized in that, The emergency triggering unit includes at least one emergency stop switch, which is a mechanical self-locking mushroom-head button with key reset. The formula for the normal circuit conduction of the emergency triggering unit is as follows: ； The formula for disconnecting the emergency triggering unit's trigger circuit is as follows: 0； in, This indicates the normally closed contact state of the emergency stop switch: 1 = closed, 0 = open. The power supply status of the central control unit: 1 = powered on, 0 = disconnected.

3. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 2, characterized in that, The central control unit includes a 24V DC switching power supply and an AC contactor KM1; The 24V DC switching power supply receives 220V AC power on its input side and outputs 24V DC power on its output side, and the normally closed contact of the emergency stop switch is connected in series in the input circuit. The coil of the AC contactor KM1 is electrically connected to the output side of the 24V DC switching power supply and is driven by 24V DC power.

4. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 3, characterized in that, The power cut-off execution unit is composed of the main contacts of AC contactor KM1, which are connected in series in the 220V main power supply circuit of the building's main distribution box. The on / off state formula of the main power supply circuit is as follows: ； in, This indicates the on / off state of the 220V main power supply circuit. The current state of the KM1 coil of the AC contactor. The main contact action function is a variable.

5. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 3, characterized in that, The water circuit cutoff execution unit includes a water solenoid valve YV1, and the gas circuit cutoff execution unit includes a gas solenoid valve YV2. Both the water solenoid valve YV1 and the gas solenoid valve YV2 are normally closed solenoid valves powered by 24V DC. They are normally closed when the power is off and open when the power is on.

6. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 5, characterized in that, The control circuits of the water solenoid valve YV1 and the gas solenoid valve YV2 are connected in series in the normally open contact of the water and gas supply allow relay KA1, and after the normally open auxiliary contact of the AC contactor KM1, they are connected to the 24V DC power supply circuit.

7. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 3, characterized in that, The reset and authorization unit includes an authorization switch SA, a reset button SB1, and a water / gas supply enable relay KA1; The authorization switch SA, reset button SB1, and water / gas supply enable relay KA1 are connected in series and connected to the output circuit of the 24V DC switching power supply in the central control unit.

8. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 7, characterized in that, The formula for the coil of the water and gas supply allowance relay KA1 under energized state is as follows: ； in, For the authorized switch SA state, 1 = closed, 0 = open. The reset button SB1 is in the following states: 1 = closed, 0 = open. This indicates the output voltage status of a 24V DC switching power supply: 1 = normal, 0 = abnormal. To indicate the energized state of the relay KA1 coil for water and gas supply, 1 = energized, 0 = de-energized. The response coefficient of coil KA1; The normally open contact of the water and gas supply enable relay KA1 is connected in series in the control circuits of the water solenoid valve YV1 in the water circuit cut-off actuator and the gas solenoid valve YV2 in the gas circuit cut-off actuator.

9. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 1, characterized in that, The 220V power supply line of the building's main distribution box passes sequentially through the main air switch QF1 and the main contacts of the AC contactor KM1 of the power cut-off execution unit before returning to the building's main distribution box.

10. A one-button linkage control system for emergency shut-off of water, electricity, and gas supply according to claim 5, characterized in that, The water solenoid valve YV1 and the gas solenoid valve YV2 directly replace the original manual ball valves in the building, and the control circuit is connected to the central control unit via a 24V control line.

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