CN111354167A - Explosion-proof type interlocking alarm system for industrial analysis cabin - Google Patents
Explosion-proof type interlocking alarm system for industrial analysis cabin Download PDFInfo
- Publication number
- CN111354167A CN111354167A CN202010252411.5A CN202010252411A CN111354167A CN 111354167 A CN111354167 A CN 111354167A CN 202010252411 A CN202010252411 A CN 202010252411A CN 111354167 A CN111354167 A CN 111354167A
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- explosion
- alarm
- exhaust fan
- industrial analysis
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to the technical field of electrical control, and discloses an explosion-proof type interlocking alarm system for an industrial analysis cabin, which comprises a combustible gas detector, a toxic gas detector, an audible and visual alarm, an exhaust fan and an interlocking alarm control box, wherein a control panel of the interlocking alarm control box is provided with a silencing button and a manual/automatic switching button; the PLC control unit is installed in the interlocking alarm control box, the combustible gas detector, the toxic gas detector, the silencing button and the manual/automatic switching button are respectively and electrically connected to corresponding input ports of the PLC control unit, and corresponding output ports of the PLC control unit are electrically connected with an intermediate relay for controlling an exhaust fan contactor, an audible and visual alarm, a combustible gas alarm lamp and a toxic gas alarm lamp.
Description
Technical Field
The invention relates to the technical field of industrial electrical control, in particular to an explosion-proof type interlocking alarm system for an industrial analysis cabin.
Background
Analytical instruments and meters used in an industrial field are additionally provided with the analysis cabin, the explosion-proof analysis cabin is also needed in an explosive gas environment, and in order to guarantee the safety of the industrial field, the detection of combustible gas and toxic gas in the analysis cabin and the industrial field is very important.
Under the condition, the alarm interlocking system is specially suitable for the explosion-proof analysis cabin, monitors and alarms combustible gas and toxic gas in the analysis cabin, and has important significance for industrial fields and the analysis cabin.
Disclosure of Invention
The invention provides an explosion-proof interlocking alarm system for an industrial analysis cabin, which solves the problem that combustible gas and toxic gas cannot be monitored and interlocked to alarm in an industrial field.
The technical scheme of the invention is realized as follows: an industrial analysis cabin explosion-proof type interlocking alarm system comprises an alarm device installed in an industrial analysis cabin:
the combustible gas detector is used for detecting the concentration of the combustible gas;
a toxic gas detector for detecting the concentration of the toxic gas;
the audible and visual alarm gives out light or alarms when the concentration of combustible gas or toxic gas is higher;
the exhaust fan is used for exhausting indoor combustible gas or toxic gas outdoors or exchanging gas with the outdoor, and a forced switch for manually starting the exhaust fan is arranged on the exhaust fan;
and a chain alarm control box which is connected with the alarm control box,
the operation panel of the interlocking alarm control box is provided with:
the silencing button is used for silencing the audible and visual alarm;
a manual/automatic switching button for switching manual or automatic control modes of the exhaust fan;
install PLC the control unit in the chain alarm control box, combustible gas detector, toxic gas detector, amortization button, manual/automatic switch button electricity are connected to respectively the input port that PLC the control unit corresponds, the output port electricity that PLC the control unit corresponds is connected with the auxiliary relay who is used for controlling exhaust fan contactor, audible-visual annunciator, combustible gas alarm lamp and toxic gas alarm lamp, the exhaust fan contactor with the exhaust fan electricity is connected.
As a preferable technical scheme, a test button for testing the audible and visual alarm and a reset button for resetting the output of the audible and visual alarm are further installed on the control panel.
As a preferable technical scheme, a safety indicator lamp is further installed on the control panel, and the safety indicator lamp is turned on when the combustible gas detector and the toxic gas detector detect normally.
As a preferable technical scheme, the analog quantity signal ends of the combustible gas detector and the toxic gas detector are electrically connected to a DCS control room.
As the preferred technical scheme, the interlocking alarm control box comprises a shell, wherein the inner part of the shell is divided into an increased safety cavity and an explosion-proof cavity, a first cover plate used for sealing the increased safety cavity is installed in the front of the increased safety cavity through a fastening piece, a flange edge is arranged in the front of the explosion-proof cavity, and a second cover plate used for sealing the explosion-proof cavity is installed on the flange edge through the fastening piece.
Preferably, the control panel is provided integrally with the first cover plate.
As the preferred technical scheme, the top of the safety increasing cavity is provided with a wire inlet and outlet interface which is convenient for wire inlet and outlet.
As an optimal technical scheme, the PLC control unit, the intermediate relay and the exhaust fan contactor are all installed in the explosion-proof cavity.
As the preferred technical scheme, four corners of the interlocking alarm control box are provided with anti-explosion shell hangers convenient to mount.
As a preferable technical scheme, a switching power supply is further installed in the interlock alarm control box, and the switching power supply is used for converting an alternating current power supply into a 24V direct current power supply to supply power to the PLC control unit and the control circuit.
The invention has the beneficial effects that: the invention is suitable for areas 1 and 2 in an explosive gas environment and areas 21 and 22 in an explosive dust environment. When the exhaust fan is started, manual and automatic switching can be performed, and the exhaust fan can be forcibly started in any environment in a manual state; under the automatic state, the starting and the stopping of the exhaust fan are controlled circularly, so that the air circulation inside the cabin is realized; when the concentration of the combustible gas detector or the toxic gas detector gives an alarm, the exhaust fan can be automatically started to replace the air in the cabin, and the combustible gas alarm lamp is ignited to display alarm information; and in a safe state, displaying through a safety indicator lamp.
The testing button is arranged, and the testing button is pressed to test whether the acousto-optic alarm lamp works normally or not in the non-alarm state of the alarm lamp; when the audible and visual alarm alarms are in an alarm state and any detector detects that the gas concentration exceeds the standard, a silencing button on the chain alarm control box can be pressed, the audible and visual alarm lamps can be used for silencing for 5 minutes, self-detection is recovered after 5 minutes, and when the detector is in a fault, a reset button on the explosion-proof box can be pressed to reset the detector.
The invention can realize alarming when the concentration of combustible gas and toxic gas exceeds the standard, adopts relative operation on the alarm information through the silencing button and the reset button, and adopts linkage operation on the alarm information through the internal program control of the PLC control unit, thereby realizing real-time monitoring and alarm processing on the working condition of the analysis cabin and improving the safety of an industrial field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a field installation of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an interlock alarm control box according to an embodiment of the present invention;
FIG. 3 is a wiring diagram of a PLC control unit according to an embodiment of the present invention;
FIG. 4 is a diagram of a power supply and control circuit according to an embodiment of the present invention;
FIG. 5 is a schematic electrical connection diagram of an exhaust fan according to an embodiment of the present invention;
FIG. 6 is a schematic external wiring diagram of an interlock alarm control box according to an embodiment of the present invention;
in the figure, 1-linkage alarm control box; 11-explosion-proof cavity; 12-increasing the safety cavity; 21-a second cover plate; 22-a manipulation panel; 3-explosion-proof shell hangers; 4-an in-out line interface; 5-audible and visual alarm; 6-combustible gas detector; 7-toxic gas detector; 8-exhaust fan; 9-analysis cabin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments, and the description of the embodiments is provided to help understanding of the present invention, but not to limit the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, an explosion-proof interlock alarm system for an industrial analysis cabin is provided, in which an industrial analysis cabin 9 is installed:
a combustible gas detector 6 for detecting the concentration of combustible gas;
a toxic gas detector 7 for detecting the concentration of the toxic gas;
the audible and visual alarm 5 gives out light or alarms when the concentration of combustible gas or toxic gas is higher;
the exhaust fan 8 is used for exhausting indoor combustible gas or toxic gas outdoors or exchanging gas with the outdoor, and a forced switch used for manually starting the exhaust fan is arranged on the exhaust fan;
and an interlocking alarm control box 1.
As shown in fig. 2, the interlock alarm control box 1 includes a housing, the interior of the housing is divided into an increased safety chamber 12 and an explosion-proof chamber 11, a first cover plate for sealing the increased safety chamber is installed in front of the increased safety chamber 12 through a fastening piece, and a control panel 22 of the control box is integrally arranged with the first cover plate.
The top of the safety increasing cavity 12 is provided with an incoming and outgoing line interface 4 which is convenient for incoming and outgoing lines.
The front of the explosion-proof cavity 11 is provided with a flange edge, and a second cover plate 21 for sealing the explosion-proof cavity is arranged on the flange edge through a fastening piece.
The control panel 22 of the interlocking alarm control box is provided with control buttons and display lamps, the control buttons are arranged on the upper row, and the indicator lamps are arranged on the second row.
The control buttons are sequentially from left to right:
the reset button is used for resetting the output of the audible and visual alarm;
the test button is used for testing the audible and visual alarm;
the silencing button is used for silencing the audible and visual alarm;
and the manual/automatic switching button is used for switching the manual or automatic control mode of the exhaust fan.
The indicating lamp is sequentially provided with a combustible gas alarm lamp, a toxic gas alarm lamp and a safety indicating lamp from left to right.
For convenience in installation, four corners of the interlocking alarm control box 1 are provided with anti-explosion shell hangers 3 for convenience in installation.
As shown in fig. 3 to 6, install the PLC control unit in the chain alarm control box, combustible gas detector, toxic gas detector, amortization button, manual/automatic switch button are connected to the input port that PLC control unit corresponds respectively electrically, and the output port electricity that PLC control unit corresponds is connected with the auxiliary relay who is used for controlling exhaust fan contactor, audible-visual annunciator, combustible gas alarm lamp and toxic gas alarm lamp, and exhaust fan contactor is connected with the exhaust fan electricity.
The PLC control unit, the intermediate relay and the exhaust fan contactor are all installed in the explosion-proof cavity.
And the analog quantity signal ends of the combustible gas detector and the toxic gas detector are electrically connected to the DCS control room.
And a switching power supply is also arranged in the interlocking alarm control box and used for converting an alternating current power supply into a 24V direct current power supply to supply power for the PLC control unit and the control circuit.
The control process of the invention is as follows:
the starting of the exhaust fan has two modes of manual control and automatic control, the control mode is switched by a manual/automatic switching button, and the exhaust fan can be forcibly started in any environment in a manual state; under the automatic state, the starting and the stopping of the exhaust fan are controlled circularly, so that the air circulation inside the cabin is realized; when the combustible gas detector or the toxic gas detector detects that the gas concentration exceeds the standard and gives an alarm, the exhaust fan can be started to replace the air in the cabin regardless of the state of the exhaust fan, and a response indicating lamp is lightened on the control box to reflect the alarm sent by which detector; under the safe state, the control box is provided with a safety indicator lamp for prompting.
The test button can be pressed to test whether the acousto-optic alarm lamp works normally or not in a safe state; the silencing button can be pressed down under the alarm state of the alarm lamp, the sound-light alarm lamp can be silenced for 5 minutes, the self-checking is recovered after 5 minutes, and the reset button can be pressed down to reset the gas detector and the sound-light alarm when the gas detector fails.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an explosion-proof type interlock alarm system of industrial analysis cabin which characterized in that, including installing in industrial analysis cabin:
the combustible gas detector is used for detecting the concentration of the combustible gas;
a toxic gas detector for detecting the concentration of the toxic gas;
the audible and visual alarm gives out light or alarms when the concentration of combustible gas or toxic gas is higher;
the exhaust fan is used for exhausting indoor combustible gas or toxic gas out of the room or exchanging gas with the outside of the room,
the exhaust fan is provided with a forced start switch for manually starting the exhaust fan;
and a chain alarm control box which is connected with the alarm control box,
the operation panel of the interlocking alarm control box is provided with:
the silencing button is used for silencing the audible and visual alarm;
a manual/automatic switching button for switching manual or automatic control modes of the exhaust fan;
install PLC the control unit in the chain alarm control box, combustible gas detector, toxic gas detector, amortization button, manual/automatic switch button electricity are connected to respectively the input port that PLC the control unit corresponds, the output port electricity that PLC the control unit corresponds is connected with the auxiliary relay who is used for controlling exhaust fan contactor, audible-visual annunciator, combustible gas alarm lamp and toxic gas alarm lamp, the exhaust fan contactor with the exhaust fan electricity is connected.
2. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 1, wherein: and the control panel is also provided with a test button for testing the audible and visual alarm and a reset button for resetting the output of the audible and visual alarm.
3. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 1, wherein: and a safety indicator lamp is further installed on the control panel, and the safety indicator lamp is lightened when the combustible gas detector and the toxic gas detector are detected normally.
4. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 1, wherein: and the analog quantity signal ends of the combustible gas detector and the toxic gas detector are electrically connected to the DCS control room.
5. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 1, wherein: the interlocking alarm control box comprises a shell, wherein the inner part of the shell is divided into an increased safety cavity and an explosion-proof cavity, the front of the increased safety cavity is provided with a first cover plate which is closed by the increased safety cavity through a fastening piece, the front of the explosion-proof cavity is provided with a flange edge, and the flange edge is provided with a second cover plate which is closed by the explosion-proof cavity through the fastening piece.
6. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 5, wherein: the operation panel is integrally provided with the first cover plate.
7. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 5, wherein: the top of the increased safety cavity is provided with a wire inlet and outlet interface convenient for wire inlet and outlet.
8. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 5, wherein: and the PLC control unit, the intermediate relay and the exhaust fan contactor are all installed in the explosion-proof cavity.
9. An industrial analysis cabin explosion-proof type interlock alarm system as claimed in any one of claims 1 to 8, wherein: four corners of the interlocking alarm control box are provided with anti-explosion shell hangers convenient to mount.
10. The explosion-proof type interlock alarm system for the industrial analysis cabin according to claim 1, wherein: and a switching power supply is further installed in the interlocking alarm control box and used for converting an alternating current power supply into a 24V direct current power supply to supply power for the PLC control unit and the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010252411.5A CN111354167A (en) | 2020-04-01 | 2020-04-01 | Explosion-proof type interlocking alarm system for industrial analysis cabin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010252411.5A CN111354167A (en) | 2020-04-01 | 2020-04-01 | Explosion-proof type interlocking alarm system for industrial analysis cabin |
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| Publication Number | Publication Date |
|---|---|
| CN111354167A true CN111354167A (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010252411.5A Pending CN111354167A (en) | 2020-04-01 | 2020-04-01 | Explosion-proof type interlocking alarm system for industrial analysis cabin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116338110A (en) * | 2023-05-23 | 2023-06-27 | 江苏兰格特自动化设备有限公司 | Probe structure for gas analysis cabin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203259871U (en) * | 2013-06-05 | 2013-10-30 | 利丰工程技术(天津)有限公司 | Control system of positive voltage explosion-proof house |
| CN105864088A (en) * | 2016-05-10 | 2016-08-17 | 成都乐维斯科技有限公司 | Safety alarm device for ventilator |
| CN206331566U (en) * | 2016-12-31 | 2017-07-14 | 北京北分麦哈克分析仪器有限公司 | A kind of explosion-proof analyzer house safety monitoring alarm control system |
| US20200029408A1 (en) * | 2011-08-31 | 2020-01-23 | Chia-Teh Chen | App based free setting method for setting operating parameter of security light |
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2020
- 2020-04-01 CN CN202010252411.5A patent/CN111354167A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200029408A1 (en) * | 2011-08-31 | 2020-01-23 | Chia-Teh Chen | App based free setting method for setting operating parameter of security light |
| CN203259871U (en) * | 2013-06-05 | 2013-10-30 | 利丰工程技术(天津)有限公司 | Control system of positive voltage explosion-proof house |
| CN105864088A (en) * | 2016-05-10 | 2016-08-17 | 成都乐维斯科技有限公司 | Safety alarm device for ventilator |
| CN206331566U (en) * | 2016-12-31 | 2017-07-14 | 北京北分麦哈克分析仪器有限公司 | A kind of explosion-proof analyzer house safety monitoring alarm control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116338110A (en) * | 2023-05-23 | 2023-06-27 | 江苏兰格特自动化设备有限公司 | Probe structure for gas analysis cabin |
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Application publication date: 20200630 |
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