Stable and reliable combustible gas alarm controller system

Abstract

The utility model discloses a stable and reliable combustible gas alarm controller system, which comprises a plurality of controllers, each controller is provided with a master control module and a plurality of functional modules, the master control modules are connected through a first annular bus, one master control module is a master control module, and the other master control module is a slave control module. The main control module of each controller is connected with each functional module through a second ring bus; the main control modules and the function modules are provided with bus isolation units, the first ring bus is connected with the bus isolation units of the main control modules, and the second ring bus is connected with the bus isolation units of the main control modules and the bus isolation units of the function modules in the controller. The combustible gas alarm controller adopting CAN ring bus design, hot plug design and master control module redundancy design can adapt to complex environments, is wide in application range, and can meet high use requirements of users.

Description

TECHNICAL FIELD

[0001] The utility model relates to alarm controller technical field, more specifically, it is stable reliable combustible gas alarm controller system. BACKGROUND

[0002] With the rapid expansion of combustible gas application field, in the production, life of people bring great convenience, due to its flammable and explosive characteristics, make the accident rate also correspondingly improve, to people's life and property safety constitute great threat. In order to nip in the bud, need to detect the leakage of combustible gas, and gas alarm controller is an important link.

[0003] However, for the larger industrial occasions, cannot cut off the power to maintain, how to ensure that combustible gas alarm controller can continue normal work becomes a big problem. For the larger industrial occasions, the number of detectors can reach ten thousand, the number of controllers is also very much, how to realize the wiring of detector and controller is also a big problem. In the petroleum chemical industry, natural gas and petroleum refining plant, mining industry, combustible gas alarm controller once failure will bring great economic loss to the consumer. Now on the market combustible gas alarm controller is difficult to ensure the reliability and stability under this condition, in the fault state, very few can continue normal work or quickly restore normal work.

[0004] The above shortcomings still need to be improved. INVENTION CONTENTS

[0005] In order to solve or alleviate the problem that the existing combustible gas alarm controller can continue normal work or quickly restore normal work in the fault state, the utility model provides a stable and reliable combustible gas alarm controller system.

[0006] The utility model technical scheme is as follows:

[0007] A stable and reliable combustible gas alarm controller system, comprising a plurality of controllers, each controller is provided with a main control module and a plurality of function modules, each main control module is connected through a first ring bus, one of the main control modules is a master control, the main control module of each controller is connected with each function module through a second ring bus;The main control module and the function module are provided with bus isolation units, the first ring bus connects the bus isolation unit of each main control module, and the second ring bus connects the bus isolation unit of the main control module in the controller and the bus isolation unit of the function module.

[0008] Further, at least one of the function modules is provided with a master control redundancy unit, which is used for monitoring the master control module and can replace the master control module.

[0009] Further, each of the function modules is correspondingly provided with a redundancy replacement unit, which is used for replacing the corresponding function module.

[0010] Further, the function modules include at least one of a KEY module, an AI module, an AO module, a DI module, a DO module, a BUS module and a POW module.

[0011] Further, the controller includes a plurality of power supplies, and each of the power supplies is used for replacing power supply in sequence.

[0012] Further, the master control module and a part of the function modules are centrally arranged, and the master control module and another part of the function modules are dispersedly arranged.

[0013] Further, the master control module and the function modules or two function modules are detachably connected.

[0014] Further, the master control module and the function modules or two function modules are slidingly installed on a slide rail and connected through a male terminal and a female terminal.

[0015] Further, a hot plug unit is arranged on the function module, and the hot plug unit is used for hot plugging of the function module and the master control module.

[0016] Further, each of the master control module and the function modules is provided with a protection unit, which is used for overvoltage protection and overcurrent protection.

[0017] The combustible gas alarm controller has the advantages that the CAN ring bus design, the hot plug design and the master control module redundancy design improve the reliability and stability of the combustible gas alarm controller, simplify the wiring of the controller and the internal wiring of the controller, the module can be directly replaced without power-off in a fault state, the fault can be quickly handled, the controller can adapt to complex environments and is suitable for a wide range of applications, and the controller can meet the high use requirements of users.

[0018] In addition, the master control module backup is realized through the master control module redundancy function, the normal work of the controller is not affected by the master control module fault, the reliability and stability of the combustible gas alarm controller are further improved, the fault maintenance cost of the manufacturer is reduced, and the economic loss of the user caused by the fault is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0020] Figure 1 It is a principle topology diagram of the combustible gas alarm controller of the present application.

[0021] Figure 2 It is a CAN ring bus schematic diagram in the present application.

[0022] Figure 3 It is a CAN communication circuit principle diagram in the present application.

[0023] Figure 4 It is a high-voltage hot plug chip circuit principle diagram in the present application.

[0024] Figure 5 It is a controller external structure schematic diagram in the present application.

[0025] Figure 6 It is a controller internal module connection mode schematic diagram in the present application.

[0026] Figure 7 It is a bus isolation unit circuit principle diagram in the present application.

[0027] Among them, the various reference signs in the drawings: 1, controller; 101, power supply; 102, male terminal; 103, female terminal; 104, slide rail; 2, main control module; 201, bus isolation unit; 202, protection unit; 3, function module; 301, main control redundancy unit; 302, redundancy replacement unit; 303, KEY module; 304, AI module; 305, AO module; 306, DI module; 307, DO module; 308, BUS module; 309, POW module; 4, first ring bus; 5, second ring bus. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0029] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it can be directly or indirectly located on the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second", and the like are only for the convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise specifically limited. The meaning of "several" is one or more, unless otherwise specifically limited.

[0030] As Figures 1 to 3 shown, the stable and reliable combustible gas alarm controller system in one embodiment of the present application comprises a plurality of controllers 1, each of which is provided with a main control module 2 and a plurality of function modules 3, each main control module 2 is connected through a first ring bus 4, one of the main control modules 2 is a master control, and the main control modules 2 of each controller 1 are connected with each function module 3 through a second ring bus 5; the main control module 2 and the function module 3 are both provided with a bus isolation unit 201, the first ring bus 4 connects the bus isolation units 201 of each main control module 2, and the second ring bus 5 connects the bus isolation units 201 of the main control module 2 and the bus isolation units 201 of the function module 3 in the controller 1.

[0031] The first ring bus 4 and the second ring bus 5 are both CAN BUS communication buses, the first ring bus 4 connects each main control module 2, which can realize networking of 64 main control modules 2, form a combustible gas and toxic gas detection alarm system, namely a GDS alarm system, realize integrated management of alarm and linkage control, and realize cross-machine state linkage in the system. The second ring bus 5 connects the main control module 2 and each function module 3 of the controller 1, and the function module 3 is connected with various input devices and output devices. The second ring bus 5 can simultaneously connect multiple types of function modules 3, each type of function module 3 can be set to 64, and the second ring bus 5 can be set to 110 function modules 3. In actual application, all types of function modules 3 do not have to be used, and the specific type and number of function modules 3 can be freely matched according to user demand, thereby reducing user use cost.

[0032] As Figure 7As shown, each module (the master module 2 and each functional module 3) has a bus isolation unit, each module uses a CAN communication chip U5 circuit design with isolation, and the circuit is connected to the CANBUS bus through an analog switch. In the normal working state, the analog switch K1 is turned on, and the analog switch K2 is arbitrarily connected to one end of the bus for communication. When the communication is abnormal, the analog switch K1 is turned off, and the analog switch K1 is switched to the CAN bus in and the CAN bus out end for communication test in turn to determine the fault end, and the fault end is disconnected and separated from the bus, and then the normal end is selected for work.

[0033] Each master module 2 and each functional module 3 is provided with a bus isolation unit 201, the bus isolation unit 201 is a CAN communication chip circuit, and a ring bus is connected. The CAN communication chip has an isolation function, and when the master module 2 or the functional module 3 fails, only itself is affected, and the system communication is not affected, and the overall system can still work normally.

[0034] Specifically, each module uses a CAN communication chip U5 circuit design with isolation. In the normal working state, the CAN communication chip will communicate on both sides of the module, and when the module fails, the CAN communication chip will stop communicating with the module on the fault side.

[0035] As shown in Figure 2 and Figure 4 In a preferred example, the master module 2 and the functional module 3 are respectively provided with a protection unit 202, and the protection unit 202 is used for overvoltage protection and overcurrent protection. The protection unit 202 includes fuses F1 and F2, and the CAN communication circuit performs overvoltage protection and overcurrent protection on the circuit through the fuses F1 and F2, and a single module short circuit, open circuit and other faults will not affect the overall system. The maximum current is adjusted by adjusting the resistance value of the resistor Rsen to achieve overcurrent protection; the starting or under-voltage protection voltage is adjusted by adjusting the resistance value of the resistor R28 to change the protection voltage, the over-voltage shutdown threshold is adjusted by adjusting the resistance value of the resistor R27 to change the threshold, and the power limit is achieved by adjusting the resistor R26.

[0036] As shown in Figure 1 In a preferred example, the functional module 3 includes at least one of a KEY module 303, an AI module 304, an AO module 305, a DI module 306, a DO module 307, a BUS module 308, and a POW module 309.

[0037] Among them, the KEY module 303 is a keyboard module, which is used for inputting instructions and data to control the system to run. The BUS module 308 is a communication module, and the POW module 309 is a power module. In addition, the KEY module 303 can also be provided with various state indicator lights for indicating the system running state.

[0038] The AI module 304 is an analog input module, mainly used for collecting and processing analog voltage and current signals. Its working principle is to convert analog signals into digital signals, so that the host control module 2 can determine the program running state and give specific action instructions. For example, continuous signals such as temperature, pressure, and flow are converted into digital signals by the AI module 304, and then processed and controlled by the host control module 2.

[0039] The AO module 305 is an analog output module, used to convert the digital control signal of the host control module 2 into an analog signal of external devices. Its working principle is to convert digital signals into voltage or current signals through a digital-to-analog converter, and then output to external devices to drive actuators such as electric regulating valves or pneumatic regulating valves.

[0040] The DI module 306 is a digital input module, mainly used for receiving switch signals from external devices such as limit switches and relays. Its working principle is to convert these switch signals into digital signals that the host control module 2 can recognize, so as to make logical judgments and controls.

[0041] The DO module 307 is a digital output module, used to convert the digital control signal of the host control module 2 into an activation signal of external devices such as indicator lights and motor starters. Its working principle is to output the digital signal of the host control module 2 to the DO module 307, and then convert it into a switch signal that external devices can recognize, achieving control over external devices.

[0042] As shown in Figure 2 In a preferred example, at least one functional module 3 is provided with a host control redundancy unit 301, which is used to monitor the host control module 2 and can replace the host control module 2.

[0043] Specifically, the KEY module 303 integrates the host control redundancy unit 301, which can replace the host control module 2 to achieve functions when the host control module 2 fails. When the host control module 2 fails, the KEY module 303 can replace the host control module 2 to communicate with the upper computer and send the concentration, temperature, pressure, and other data of the detector to the total control processing. The KEY module 303 is equivalent to the redundancy of the host control module 2, which can replace the host control module 2 to play a role when the host control module 2 fails. After the host control module 2 is disassembled and replaced, the host control module 2 communicates and shows no problem, and the host control module 2 replaces the KEY module 303 to play the role of the host control module 2, and the KEY module 303 plays its original role.

[0044] The combustible gas alarm controller 1 is fixed in the controller 1 shell by four anti-falling screws, and the main control module 2 and the KEY module 303 with the main control redundancy unit 301 are convenient to disassemble and replace.

[0045] As shown in Figure 2 In a preferred example, each functional module 3 is provided with a redundancy replacement unit 302, which is used to replace the corresponding functional module 3 when the functional module 3 fails.

[0046] In a preferred example, the controller 1 includes a plurality of power supplies 101, each of which is used to replace the power supply in sequence. Specifically, the controller 1 is provided with two power supplies 101, one of which is a main power supply and the other of which is a backup power supply. The main power supply has a higher priority than the backup power supply, and the main power supply is used preferentially. When the main power supply fails, the backup power supply automatically switches, and the backup power supply continues to ensure the normal operation of the controller 1 system. Both the main power supply and the backup power supply have a voltage detection circuit that intermittently detects the voltage to determine the type of power supply 101 failure.

[0047] As shown in Figure 5 and Figure 6 In a preferred example, the main control module 2 and a part of the functional modules 3 are arranged centrally, and the main control module 2 and another part of the functional modules 3 are arranged dispersedly. The functional modules 3 can be integrated with the main control module 2, or can be separately arranged near the detector, so that they can be flexibly arranged at the desired position as needed, connected through the power supply 101 line and the CAN bus, and the wiring is simple.

[0048] As shown in Figure 5 and Figure 6 In a preferred example, the main control module 2 and the functional modules 3 or two functional modules 3 connected to each other are detachably connected.

[0049] When the modules are arranged centrally, the main control module 2 and the functional modules 3 or two functional modules 3 connected to each other are slidably mounted on the slide rail 104 and connected through the male terminal 102 and the female terminal 103, so that the internal wiring of the controller 1 is simple, and the modules are convenient to disassemble and replace. The KEY module 303 is generally arranged on the cover plate of the controller 1, and cooperates with the display screen on the cover plate to facilitate the control of the system.

[0050] As shown in Figure 4As shown, in one preferred example, a hot plug unit is arranged on the functional module 3, and the hot plug unit is used for live hot plug of the functional module 3 and the master control module 2. The hot plug unit has functions such as overcurrent protection, overvoltage protection, start-up or undervoltage protection, fault time delay and power limit programmable. Through the hot plug unit, module replacement in a live state can be realized, and online maintenance in a fault state can be realized.

[0051] Specifically, the hot plug unit includes a high-voltage hot plug chip U1 and a peripheral circuit thereof. The high-voltage hot plug chip U1 itself can realize overvoltage protection of an input of 70V.

[0052] The combustible gas alarm controller of the system can adapt to complex environments, is suitable for a wide range of places, and can meet higher use requirements of users. Compared with combustible gas alarm controllers in the industry, the controller 1 is more reliable, safe and stable, the module is easy to disassemble, the module type is identifiable, the fault position is displayable, has a hot plug function, can realize online maintenance, has a wide application range, is more convenient for actual application of users, the module can be freely combined, and different needs of different users can be met. In actual application, design time can be shortened, material cost and labor cost can be saved.

[0053] The above only describes preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A stable and reliable combustible gas alarm controller system, characterized by, The controller comprises a plurality of controllers, each of which is provided with a master control module and a plurality of function modules, each of the master control modules is connected through a first ring bus, one of the master control modules is a general control, and the master control module of each of the controllers is connected with each of the function modules through a second ring bus; The master control module and the function module are both provided with a bus isolation unit, the first ring bus connects the bus isolation units of each of the master control modules, and the second ring bus connects the bus isolation units of the master control modules and the bus isolation units of the function modules in the controller.

2. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, At least one of the function modules is provided with a master control redundancy unit, the master control redundancy unit is used for monitoring the master control module and can replace the master control module.

3. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, Each of the function modules is correspondingly provided with a redundancy replacement unit, and the redundancy replacement unit is used for replacing the corresponding function module.

4. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, The function module comprises at least one of a KEY module, an AI module, an AO module, a DI module, a DO module, a BUS module and a POW module.

5. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, The controller comprises a plurality of power supplies, and each of the power supplies is used for sequentially replacing power supply in order.

6. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, The master control module and a part of the function modules are centrally arranged, and the master control module and another part of the function modules are dispersedly arranged.

7. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, The master control module and the function module or two function modules connected with each other are detachably connected.

8. A stable and reliable combustible gas alarm controller system as claimed in claim 7 wherein, The master control module and the function module or two function modules connected with each other are slidably installed on a slide rail and connected through a male terminal and a female terminal.

9. A stable and reliable combustible gas alarm controller system as claimed in claim 8 wherein, A hot plug unit is arranged on the function module, and the hot plug unit is used for hot plugging of the function module and the master control module under power.

10. A stable and reliable combustible gas alarm controller system as claimed in claim 1, wherein, The master control module and the function module are respectively provided with a protection unit, and the protection unit is used for overvoltage protection and overcurrent protection.

Images