CN215876035U - Automatic ventilation control device of explosion-proof fan for petrochemical explosion-proof place - Google Patents
Automatic ventilation control device of explosion-proof fan for petrochemical explosion-proof place Download PDFInfo
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- CN215876035U CN215876035U CN202121404449.6U CN202121404449U CN215876035U CN 215876035 U CN215876035 U CN 215876035U CN 202121404449 U CN202121404449 U CN 202121404449U CN 215876035 U CN215876035 U CN 215876035U
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Abstract
The utility model discloses an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof place, which comprises: the explosion-proof shell is provided with a plurality of sensor interfaces and a plurality of fan control interfaces, a main control board is arranged in the explosion-proof shell, a control unit and a fan switch driving module are arranged on the main control board, the sensor interfaces and the fan switch driving module are respectively connected with the control unit, and the fan control interfaces are connected with the fan switch driving module; the sensor interface is used for being connected with a gas concentration sensor arranged in a petrochemical explosion-proof field, and the gas concentration sensor is used for detecting the concentration value of harmful gas in a set area; the fan control interface is used for being connected with an explosion-proof fan arranged in a petrochemical explosion-proof place; the control unit is used for controlling the appointed explosion-proof fan to be opened or closed by controlling the fan switch driving module according to the concentration value uploaded by the gas concentration sensor and the gas concentration set value. The utility model can monitor the concentration of indoor hazardous gas in real time and automatically start the fan.
Description
Technical Field
The utility model relates to the technical field of intelligent control, in particular to an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof place.
Background
The design of the dangerous goods pump room, the compressor room and the warehouse of the petrochemical plant device is mostly closed buildings in cold areas. In order to achieve good ventilation requirements, enclosed buildings must strictly follow the number of air changes per hour at different media as normal. The conventional method is manually operated or controlled in a timing mode, forced discharge requirements during accidental leakage of abnormal media are not comprehensively considered, and the defect caused by the forced discharge requirements is that the accidental leakage media are not discharged in time, so that the explosive gas volume is accumulated to cause a dangerous hidden danger in the existing place.
Therefore, a control system is desired, which can monitor the concentration of dangerous gas in a room in real time, and automatically start a fan according to the gas concentration value to prevent the dangerous gas from accumulating in the room.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof place, which can monitor the concentration of indoor dangerous gas in real time, automatically start the fan according to the concentration value of the gas and prevent the dangerous gas from accumulating indoors.
In order to achieve the above object, the present invention provides an automatic ventilation control device for an explosion-proof fan in a petrochemical explosion-proof location, comprising:
the explosion-proof shell is provided with a plurality of sensor interfaces and a plurality of fan control interfaces, a main control board is arranged in the explosion-proof shell, a control unit and a fan switch driving module are arranged on the main control board, the sensor interfaces and the fan switch driving module are respectively connected with the control unit, and the fan control interfaces are connected with the fan switch driving module;
the sensor interface is used for being connected with a gas concentration sensor arranged in the petrochemical explosion-proof site, and the gas concentration sensor is used for detecting the concentration value of harmful gas in a set area; the fan control interface is used for being connected with an explosion-proof fan arranged in the petrochemical explosion-proof place;
the control unit is used for controlling the appointed explosion-proof fan to be turned on or off by controlling the fan switch driving module according to the concentration value uploaded by the gas concentration sensor and the gas concentration set value.
In an alternative scheme, the fan switch driving module comprises a plurality of contactors, and each contactor correspondingly controls a switch of one explosion-proof fan;
the explosion-proof fan is provided with a normally open type starting switch and a normally closed type stopping switch;
the control coil of contactor with the control unit is connected, the normally open contact of contactor with normally open type starting switch connects in parallel, the normally closed contact of contactor with normally closed type stop switch establishes ties.
In an alternative scheme, the explosion-proof shell is further provided with a network interface and a power supply interface, and the network interface is used for the communication connection between the control unit and an external background machine so as to report gas leakage alarm information and receive a remote control instruction of the background machine.
In an alternative, the network interface is an Ethernet or RS485 communication interface.
In the alternative, the explosion-proof shell is provided with a plurality of mounting holes corresponding to the sensor interfaces, the fan control interfaces, the network interfaces and the power supply interfaces respectively, and the sensor interfaces, the fan control interfaces, the network interfaces and the power supply interfaces are hermetically arranged in the corresponding mounting holes.
In an alternative scheme, an LED display screen and a plurality of status indicator lamps are further arranged on the main control panel;
LED display screen is used for showing hazardous gas leaks alarm information, alarm information includes: alarm time, monitored gas concentration, and the location of the gas detection sensor that detects a gas concentration value greater than the gas concentration set point.
In the alternative, the control unit comprises an STM32 processor.
In the alternative, the explosion-proof grade of the explosion-proof shell is not less than dIICT 4.
In the alternative, a transparent observation window for observing the LED display screen is arranged on the front face of the explosion-proof shell.
In the alternative, the number of the sensor interfaces is at least 8, and the number of the fan control interfaces is at least 4.
The utility model has the beneficial effects that:
according to the utility model, the control unit controls the fan switch driving module to control the specified explosion-proof fan to be turned on or off according to the concentration value uploaded by the gas concentration sensor and the gas concentration set value, and when the concentration value is greater than the concentration set value, the explosion-proof fan is turned on to perform ventilation so as to avoid potential safety hazards caused by overhigh concentration of harmful gases;
further, the LED display screen displays alarm information of dangerous gas leakage, and reminds workers to carry out reconnaissance, so that production safety is effectively guaranteed.
The present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the utility model.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic structural diagram illustrating an external structure of an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof site according to an embodiment of the utility model.
Fig. 2 is a schematic block diagram of an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof site according to an embodiment of the utility model.
Fig. 3 is a schematic block diagram of a main control board of an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof site according to an embodiment of the utility model.
Description of the reference symbols
10-explosion-proof housing; 11-a sensor interface; 12-a fan control interface; 13-a main control board; 130-a control unit; 131-a fan switch driving module; 101-a network interface; 102-a power interface; 132-LED display screen; 103-transparent viewing window.
Detailed Description
The present invention will be described in more detail below. While the present invention provides preferred embodiments, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides an automatic ventilation control device of an explosion-proof fan for a petrochemical explosion-proof place, and referring to fig. 1 to 3, the control device comprises:
the explosion-proof shell 10 is provided with a plurality of sensor interfaces 11 and a plurality of fan control interfaces 12, a main control board 13 is arranged in the explosion-proof shell 10, the main control board 13 is provided with a control unit 130 and a fan switch driving module 131, the sensor interfaces 11 and the fan switch driving module 131 are respectively connected with the control unit 130, and the fan control interfaces 12 are connected with the fan switch driving module 131;
the sensor interface 11 is used for being connected with a gas concentration sensor arranged in the petrochemical explosion-proof plant, and the gas concentration sensor is used for detecting the concentration value of harmful gas in a set area; the fan control interface 12 is used for being connected with an explosion-proof fan arranged in the petrochemical explosion-proof place;
the control unit 130 is configured to control the specified explosion-proof fan to be turned on or off by controlling the fan switch driving module 131 according to the concentration value uploaded by the gas concentration sensor and the gas concentration set value.
The device is installed in a pump room, a compressor factory building and a dangerous goods warehouse of a petrochemical plant device, monitors the concentration of dangerous gas, automatically ventilates according to the concentration of the dangerous gas, and eliminates the potential safety hazard caused by volatilization accumulation and accidental leakage of the dangerous gas.
In one embodiment, the explosion-proof grade of the explosion-proof shell 10 is not less than dIICT4 so as to adapt to the application of different explosion-proof places. The quantity of sensor interface is 8 at least, the quantity of fan control interface is 4 at least.
In one embodiment, the fan switch driving module 131 includes a plurality of contactors, and each contactor controls a switch of one explosion-proof fan; the explosion-proof fan is provided with a normally open type starting switch and a normally closed type stopping switch; the control coil of the contactor is connected with the control unit 130, the normally open contact of the contactor is connected with the normally open type starting switch in parallel, and the normally closed contact of the contactor is connected with the normally closed type stopping switch in series.
In an embodiment, the explosion-proof housing 10 is further provided with a network interface 101 and a power interface 102, where the network interface 101 is used for the control unit 130 to be in communication connection with an external background machine, so as to report gas leakage alarm information and receive a remote control instruction of the background machine. The control unit 130 may be an STM32 processor and the network interface 101 may be an Ethernet or RS485 communication interface. The power interface 102 is optionally adapted for 220V ac.
In one embodiment, the explosion-proof housing 10 is provided with a plurality of mounting holes respectively corresponding to the plurality of sensor interfaces 11, the plurality of fan control interfaces 12, the network interface 101, and the power supply interface 102, and the sensor interfaces 11, the fan control interfaces 12, the network interface 101, and the power supply interface 102 are all hermetically disposed in the corresponding mounting holes.
In one embodiment, the main control board 13 is further provided with an LED display screen 132 and a plurality of status indicators; correspondingly, a transparent observation window 103 for observing the LED display screen 132 is arranged on the front surface of the explosion-proof housing 10.
Examples
Referring to fig. 1 to 3, the present apparatus is described by an embodiment.
The shell of the device is an explosion-proof shell 10, 14 mounting holes are formed outwards from the explosion-proof shell 10, the explosion-proof shell 10 is opposite to an observer and is provided with a transparent observation window 103, and an LED display on a main control board 13 in the explosion-proof shell 10 can be seen. The 14 mounting holes are respectively: 8 detection signals for introducing 8 gas concentration sensors (located on the left side of the explosion-proof housing 10); 4 switch control signals (positioned on the right side of the explosion-proof shell 10) for outputting 4 fans; 1 network communication (485/Ethernet) used for the equipment and external background machine equipment (positioned at the top of the explosion-proof shell 10); one for the introduction of 220VAC ac power (located on top of the explosion proof enclosure 10) and 32 pairs of normally open and normally closed contacts may also be extended to control multiple fans.
The control principle is as shown in fig. 2 and fig. 3, the signal processing and logic control are executed by a main control board 1313, such as a central processing unit (STM32), and there are 8 paths of gas detector input data. The user can be according to the actual need at scene, connects 1 to 8 gas concentration sensor, and every gas concentration sensor's output signal is 4 ~ 20 mA's current signal for express the harm gas concentration level that its monitored area detected. 4 electric signal output lines send out signals to control the fan. The user can output and control 1 to 4 fans according to the actual situation on site. The capacity of the switch signal output to the fan is more than 10A (according to the power of the contactor coil of the controlled fan). And the other port is a 485 protocol network cable interface and an Ethernet interface. The user sets the working parameters (remote signaling) and starts the operation (remote control) of the device through the network. The user can also carry out the self-checking to this device through the network, can find which gas concentration sensor is out of work and which control fan switch's contactor coil is out of order or which fan output control does not connect the contactor. After the user sets the operating parameters for the device according to the configuration of the gas concentration sensor and the fan on site, the device can be put into operation. The device works in a timing ventilation control mode at ordinary times, and gas concentration data sent by each gas concentration sensor is monitored in real time on line. When any one gas concentration sensor detects that there is gas leakage (gas concentration surpasses the numerical value of settlement), this device starts all fans that connect immediately and airs exhaust the operation of taking a breath, and simultaneously, this device still is equipped with LED display module, and accessible network sends the alarm information that gas leaked to the host computer, and this information includes: the state of the device is known visually by the leakage time, the position of the gas concentration sensor for detecting gas leakage and the concentration of the leaked gas.
This device can in time discover the condition that gas revealed to start the fan at once and take a breath, reveal the explosion that can bring, poison danger and eliminate in the bud state with gas. For the instruction from the DCS system to start and stop the fan, the control can also realize the function through a network interface.
Applications in petrochemical industry compressor plants (four examples only)
In a large closed compressor factory building, because the medium in the compressor is flammable and explosive mixed gas, the exhaust and ventilation process can be started immediately when the gas medium leaks, and possible explosion hidden dangers are eliminated. Because the area of the factory building is large, the air exhaust and air exchange equipment comprises two air supply fans and two air exhaust fans. The device can connect the output switch signals (normally open) of 4 starting motors of the device with the starting switches of the motors of the exhaust fan and the blower in parallel respectively, and connect the output switch signals (normally closed) of 4 stopping motors in series to the stopping switches of the exhaust fan and the blower respectively, thereby realizing the control of the timing and emergency starting and stopping of the blower. Meanwhile, one gas concentration sensor is installed near each of six possible medium leakage points. The output signals of the six gas concentration sensors are connected with the device (the device has 8 signal input holes of the gas concentration sensors, in this example, 6 are used, and the other two can be blocked by sealing caps), and after the power supply wires and the network connecting wires of the device are connected, an operator seals the explosion-proof sealing door. At this time, the present apparatus can be electrically operated. The operator can set the operation parameters of the device and start the device through the remote computer and the network transmission line. The operating parameters include: the device comprises a real-time clock, the timing start-stop time of the running of the fan, the position information of the gas concentration sensor, the alarm value of the gas medium and the like.
Application in chemical warehouse
For a chemical warehouse of a chemical enterprise, due to the toxic characteristics of the stored articles, the leakage of toxic media needs to be found in time and the toxic media needs to be cleared in real time (forced air exhaust), so that toxic gas media are prevented from poisoning workers entering and exiting the warehouse. Because the warehouse area is large, the air exhaust and exchange equipment comprises two air supply fans and two air exhaust fans. The device can connect the output switch signals (normally open) of 4 starting motors of the device with the starting switches of the motors of the exhaust fan and the blower in parallel respectively, and connect the output switch signals (normally closed) of 4 stopping motors in series to the stopping switches of the exhaust fan and the blower respectively, thereby realizing the control of the timing and emergency starting and stopping of the blower. Meanwhile, 8 gas concentration sensors for monitoring medium leakage on line are uniformly distributed in the warehouse space. The output signals of these 8 gas concentration sensors are connected to the present apparatus. When the power supply line and the network connecting line of the device are connected, an operator can seal the explosion-proof sealing door. Then the device is powered on, and an operator can set the operation parameters of the device and start the device through a remote computer and a network transmission line.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides an automatic controlling means that takes a breath of explosion-proof fan for petrochemical industry explosion-proof place which characterized in that includes:
the explosion-proof shell is provided with a plurality of sensor interfaces and a plurality of fan control interfaces, a main control board is arranged in the explosion-proof shell, a control unit and a fan switch driving module are arranged on the main control board, the sensor interfaces and the fan switch driving module are respectively connected with the control unit, and the fan control interfaces are connected with the fan switch driving module;
the sensor interface is used for being connected with a gas concentration sensor arranged in the petrochemical explosion-proof site, and the gas concentration sensor is used for detecting the concentration value of harmful gas in a set area; the fan control interface is used for being connected with an explosion-proof fan arranged in the petrochemical explosion-proof place;
the control unit is used for controlling the appointed explosion-proof fan to be turned on or off by controlling the fan switch driving module according to the concentration value uploaded by the gas concentration sensor and the gas concentration set value.
2. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof site as claimed in claim 1, wherein the fan switch driving module comprises a plurality of contactors, and each contactor correspondingly controls the switch of one explosion-proof fan;
the explosion-proof fan is provided with a normally open type starting switch and a normally closed type stopping switch;
the control coil of contactor with the control unit is connected, the normally open contact of contactor with normally open type starting switch connects in parallel, the normally closed contact of contactor with normally closed type stop switch establishes ties.
3. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof place as claimed in claim 1, wherein a network interface and a power supply interface are further arranged on the explosion-proof shell, and the network interface is used for the communication connection between the control unit and an external background machine so as to report gas leakage alarm information and receive a remote control instruction of the background machine.
4. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof site as claimed in claim 3, wherein the network interface is an Ethernet or RS485 communication interface.
5. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof site as claimed in claim 3, wherein the explosion-proof housing is provided with a plurality of mounting holes corresponding to the sensor interface, the fan control interface, the network interface and the power supply interface, and the sensor interface, the fan control interface, the network interface and the power supply interface are hermetically arranged in the corresponding mounting holes.
6. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof place as claimed in claim 1, wherein the main control panel is further provided with an LED display screen and a plurality of status indicators;
LED display screen is used for showing harm gas leakage's alarm information, alarm information includes: an alarm time, a monitored gas concentration, and a location of the gas concentration sensor that detects a gas concentration value greater than the gas concentration set point.
7. The automatic ventilation control device of an explosion-proof fan for petrochemical explosion-proof sites according to claim 1, wherein the control unit comprises an STM32 processor.
8. The automatic ventilation control device for the explosion-proof fan of the petrochemical explosion-proof site is characterized in that the explosion-proof grade of the explosion-proof shell is not less than dIICT 4.
9. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof place as claimed in claim 6, wherein a transparent observation window for observing the LED display screen is arranged on the front surface of the explosion-proof shell.
10. The automatic ventilation control device for the explosion-proof fan in the petrochemical explosion-proof site according to claim 1, wherein the number of the sensor interfaces is at least 8, and the number of the fan control interfaces is at least 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121404449.6U CN215876035U (en) | 2021-06-23 | 2021-06-23 | Automatic ventilation control device of explosion-proof fan for petrochemical explosion-proof place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121404449.6U CN215876035U (en) | 2021-06-23 | 2021-06-23 | Automatic ventilation control device of explosion-proof fan for petrochemical explosion-proof place |
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| Publication Number | Publication Date |
|---|---|
| CN215876035U true CN215876035U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121404449.6U Active CN215876035U (en) | 2021-06-23 | 2021-06-23 | Automatic ventilation control device of explosion-proof fan for petrochemical explosion-proof place |
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| Country | Link |
|---|---|
| CN (1) | CN215876035U (en) |
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2021
- 2021-06-23 CN CN202121404449.6U patent/CN215876035U/en active Active
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