CN113884623A - Detection method and detection alarm device for flammable gas in hazardous chemical storage area - Google Patents
Detection method and detection alarm device for flammable gas in hazardous chemical storage area Download PDFInfo
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Abstract
The invention belongs to the technical field of combustible gas detection, and discloses a method for detecting combustible gas in a hazardous chemical storage area, which comprises the following steps: the first step is as follows: firstly, the air extraction and alarm modules are paved on the roof of the storage area, the adjacent air extraction and alarm modules are paved at equal intervals, and the final distribution form of the paving air extraction and alarm modules is determined according to the house type of the civil engineering design of the storage area. According to the invention, the interface selection cover is magnetically attracted by the electromagnet to move upwards, and the airflow groove on the surface of the interface selection cover is only communicated with one interface, so that only the air suction and alarm module communicated with the interface can normally collect gas, and further the pertinence inspection can be carried out on the part of gas.
Description
Technical Field
The invention belongs to the technical field of combustible gas detection, and particularly relates to a combustible gas detection method and a detection alarm device for a hazardous chemical storage area.
Background
Dangerous chemicals storage area is used for depositing some dangerous chemicals, and these chemicals generally can carry out strict sealed storage, and for example the overhead tank carries out the filling and handles, but in order to further ensure safety, must install corresponding detection alarm device and detect the storage area in the storage area to remind gaseous the revealing of dangerous chemicals.
The existing real-time monitoring mode for hazardous chemical substance gas is various, corresponding detection equipment and an alarm device are mainly installed in a storage area, after flammable gas containing hazardous chemical substances in air or flammable gas concentration exceeds standard, alarm is conducted, but because the area of the storage area is large, single alarm cannot be conducted to quickly assist positioning of a leakage area, maintenance personnel still need to conduct regional screening, the leakage area is finally determined, timeliness is lacked, a plurality of detection devices and alarm equipment can be set in different positions through the access, the mode is very high in cost and not economical.
The invention provides a novel detection method and a detection alarm device for flammable gas in a hazardous chemical storage area, aiming at the problems, on the basis of controlling the cost, the timeliness of alarming is improved, area positioning is provided, and the determination time is reduced to the greatest extent.
Disclosure of Invention
The invention aims to provide a method for detecting flammable gas in a hazardous chemical storage area and a detection alarm device, so as to solve the problems in the background technology.
In order to achieve the above purpose, the invention provides the following technical scheme: a method for detecting flammable gas in a hazardous chemical storage area comprises the following steps:
the first step is as follows: firstly, laying air extraction and alarm modules on the roof of a storage area, wherein the adjacent air extraction and alarm modules are laid equidistantly, the final distribution form of the laid air extraction and alarm modules is determined according to the house type of civil design of the storage area, a detection device is arranged at the relative central position of the roof of the storage area, a port of the detection device is required to be communicated with an air extraction pipe of the air extraction and alarm modules through a long and thin hose, the number of the air extraction and alarm modules is not strictly regulated, when the space of the storage area is larger, a plurality of air extraction and alarm modules can be laid equidistantly, but the maximum number of the air extraction and alarm modules is not more than sixteen because the arrangement of more air extraction and alarm modules can increase the time length and uncertainty of the subsequent judgment process, and the device can control the judgment time to be minimum to avoid errors to the maximum extent only when inflammable gas can be rapidly dispersed in the air, therefore, the number of the air exhaust and alarm modules is not too large, and a distribution mode of the air exhaust and alarm modules and the detection device is shown in the figure;
the second step is that: the extraction fan can extract air in each part of the space of the storage area, the air flow enters the extraction pipe and is conveyed to the air pipe through the slender hose and the communicated inner cavity of the detection device, the air flow flows through the gas detection sensor and is detected through the gas detection sensor, when flammable gas contained in the air flow exceeds the standard, the processor and the controller module control the extraction fan to be powered on, the interface selection cover which is originally positioned at the lower part of the inner cavity of the detection device is attracted by the extraction fan to move upwards, the interface selection cover only partially seals and conducts the interfaces distributed on the surface of the detection device, the interfaces outside the detection device are communicated with the extraction pipe, if the number of the air extraction and alarm modules which are not arranged in the storage area is less than sixteen, the interfaces which are not communicated with the extraction pipe are sealed, when the gas detection sensor detects that the flammable gas which exceeds the standard is contained in the storage area at first time, the processor and the controller module power on the electromagnet, the electromagnet has magnetic force to suck the interface selection cover up, at the moment, the airflow groove on the surface of the interface selection cover is only communicated with one interface, so that only the air suction and alarm module communicated with the interface can collect gas normally, and the airflow speed in the passage is accelerated due to the increase of the air inlet amount, so that the detection device can quickly collect the gas, detect the gas pertinently and record the concentration of the inflammable gas in the region, so that the subsequent comparison is carried out, and the rest interfaces are all blocked by the outer peripheral surface of the cover body, so that the air suction and alarm modules of other parts cannot collect the gas;
the third step: the motor controls the interface selection cover to rotate, and the communicated interfaces are switched one by one, so that the detection device can check the single air flow sucked by one air suction and alarm module one by one, namely, the gases in each part of the storage area are screened one by one until all the gases are screened;
the fourth step: the processor and controller module compares the concentration of inflammable gas contained in the gas of each part to obtain the part of the storage area corresponding to the gas with the maximum concentration, and controls the part to exhaust gas and controls the alarm lamp and the buzzer on the alarm module to flash and buzz to alarm respectively.
Preferably, set up in sixteen interfaces on detection device surface, fixed intercommunication in detection device's tuber pipe, set up gaseous detection sensor and the extraction fan in the tuber pipe inner chamber, carry out the treater and the controller module that control, its characterized in that to gaseous detection sensor and extraction fan including detection device, equidistance: the detection device is characterized in that an interface selection cover is sleeved in an inner cavity of the detection device, a motor controlled by a processor and a controller module is arranged at the bottom of the inner cavity of the detection device, a main shaft of the motor penetrates through the interface selection cover and is in transmission fit with the interface selection cover, a lower limit card and an upper limit card are arranged on the wall of the inner cavity of the detection device, the interface selection cover is always positioned between the lower limit card and the upper limit card, an electromagnet is further arranged at the top of the inner cavity of the detection device, air exhaust and alarm modules are distributed at equal heights around the detection device, the motor does not rotate in an initial state, and clamping teeth arranged on the main shaft of the motor can be clamped with upper and lower through grooves of the interface selection cover, so that the interface selection cover can move up and down along the main shaft of the motor and can also be clamped with the through grooves of the interface selection cover to drive the interface selection cover to rotate;
bleed and alarm module including the exhaust tube, through alarm lamp and the bee calling organ of mounting bracket rigid coupling in the exhaust tube both sides, the exhaust tube passes through long and thin hose and interface switch-on, exhaust tube and alarm lamp all receive treater and controller module control, and the alarm lamp is the red light lamp, and it presents the scintillation after opening and shines red light awn to the region below, covers the below region, and this regional inflammable gas concentration of suggestion staff is the highest, and the key is investigated and examined to the chemical that this region was deposited, and the sound then can outwards take place for the bee calling organ, plays the effect that guides the staff equally.
Preferably, go up spacing card and set up in the top of cover is selected to the interface and be located the below of electro-magnet, it is a millimeter apart from vertical direction and electro-magnet to go up spacing card, the annular equidistance movable mounting in bottom of going up spacing card has ten balls, goes up spacing card and restricts as the vertical removal height of cover is selected to the interface, and it can avoid the interface to select the cover direct and electro-magnet to take place the contact.
Preferably, the interface selection cover comprises a cover body, an iron top cover fixedly arranged at the top of the cover body, an airflow groove arranged on the outer peripheral surface of the cover body, and a lace wheel fixedly arranged at the bottom of the cover body, the peripheral surface of the cover body is in contact with the inner wall of the detection device in an attaching manner, the interface selection cover moves in the vertical direction until the upper limit of the interface selection cover is that the top surface of the iron top cover is in contact with the ball at the bottom of the upper limit clamp, the lower limit of the movement of the interface selection cover in the vertical direction is that the bottom surface of the cover body is contacted with the top surface of the lower limit clamp, the iron top cover on the interface selection cover is made of iron, so that the interface selection cover is attracted by the electromagnet to drive the whole interface selection cover to ascend, the iron top cover is finally contacted with the ball bearing, and the ball bearing is matched with the rotation of the iron top cover to roll when the interface selection cover rotates, rolling friction is used to replace sliding friction or other friction situations, and the rotation resistance of the interface selection cover is reduced.
Preferably, when the interface selection cover is located at the upper limit of movement in the vertical direction, the airflow groove is aligned and communicated with one of the interfaces, and the rest of the interfaces are blocked by the outer peripheral surface of the cover body, and when the interface selection cover is located at the lower limit of movement in the vertical direction, the interface selection cover is always located below the interfaces, and in an initial state, the interface selection cover is located at the top of the lower limit card and cannot move downwards continuously due to the limit of the lower limit card.
Preferably, the surface of the iron top cover is provided with air holes for communicating the inner cavity of the cover body with the external environment, air collected by the air exhaust pipe enters from the corresponding interface after being conveyed through the pipeline passage and enters into the inner cavity of the interface selection cover, the air is preferably output from the air holes of the iron top cover to the inner cavity space of the detection device above the interface selection cover, the air flow can pass through the detection of the air detection sensor in water entering into the air pipe.
Preferably, the peripheral surface of the lace wheel is provided with arc teeth, the number of which is equal to that of the connectors.
Preferably, still be equipped with the elasticity wheel in detection device's the inner chamber, the elasticity wheel is located the spring of slide bar surface, fixed connection in the locating wheel of slide bar inner including movable joint in slide bar, the cover of detection device casing, cover, the both ends elastic support of slide bar is in locating wheel and detection device's inner wall, when the vertical removal of interface selection cover, the locating wheel contacts with the lace wheel all the time, and the height ratio of lace wheel is higher, so when the lace wheel rises, even the locating wheel and the lace wheel between take place sliding friction and also can not break away from.
Preferably, when the stable irrotation of interface selection cover, the wheel body block of locating wheel is between two adjacent arc tooth of lace wheel, when lace wheel is rotatory, the arc tooth that the locating wheel can follow the lace wheel rolls the outer peripheral face at the lace wheel, when error appears in lace wheel pivoted angle, the locating wheel can only contact with an arc tooth, and an arc tooth can not provide stable support to the locating wheel, the locating wheel can move forward because the elasticity of spring makes the arc tooth atress rather than the contact rotate, final locating wheel and another arc tooth contact and reach and form the atress balance between two arc teeth and the locating wheel, then the lace wheel drives the holistic rotation angle of interface selection cover and corrects.
Preferably, the air flow groove is necessarily aligned with one interface in the vertical direction in the initial state, so that the air flow groove can be directly aligned with one interface after rising, and then the air flow groove can conduct the interface and close the other interfaces.
The invention has the following beneficial effects:
1. the invention lays the air extraction and alarm module and the detection device on the roof of the storage area, and the interface of the detection device is communicated with the air extraction pipe of the air extraction and alarm module through the slender hose to arrange the motor and the interface selection cover in the inner cavity of the detection device, so that the motor is in transmission connection with the interface selection cover and the interface selection cover can move up and down along the main shaft of the motor, when the inflammable gas is detected to be contained in the gas, the interface selection cover is attracted by the magnet to move upwards and the airflow groove on the surface of the interface selection cover is only communicated with one interface, so that only the air suction and alarm module communicated with the interface can normally collect the gas, and then the targeted inspection is carried out on the part of gas, the targeted inspection function is realized through the structure, on the premise of only arranging one detection device, each area can still be screened efficiently, and obvious economic benefit and effectiveness are achieved.
2. According to the invention, the elastic wheel is arranged, so that the positioning wheel is in elastic rolling contact with two adjacent arc teeth of the lace wheel, when the lace wheel has an error in rotation degree, the positioning wheel can only be in contact with one arc tooth, but one arc tooth can not provide stable support for the positioning wheel, the positioning wheel moves forwards due to the elastic force of the spring to enable the arc tooth in contact with the positioning wheel to be stressed and rotated, finally, the positioning wheel is in contact with the other arc tooth, and the stress balance is formed between the two arc teeth and the positioning wheel, so that the lace wheel drives the interface selection cover to correct the rotation angle of the whole interface selection cover.
3. According to the invention, the alarm lamp and the buzzer are arranged on each air extraction and alarm module and are controlled by the processor and the controller module, and when the highest concentration of the area where the corresponding air extraction and alarm module is located is detected, the vicinity of the leakage area can be preliminarily judged, so that the processor and controller module controls the alarm lamp and the buzzer to work, the position of the leakage area is prompted to a worker, and the worker is emphatically checked.
Drawings
FIG. 1 is a schematic view of the entire detecting device of the present invention;
FIG. 2 is a front view of the detection device of the present invention;
FIG. 3 is a schematic view of the internal structure of the detecting device of the present invention;
FIG. 4 is an exploded view of the internal structure of the detecting device of the present invention;
FIG. 5 is a schematic view of the elastic wheel engaging with the lace wheel according to the present invention;
FIG. 6 is a schematic structural view of an upper limit clip according to the present invention;
FIG. 7 is a sectional view showing the internal structure of the detecting unit according to the present invention;
FIG. 8 is a schematic view of an interface selection mask according to the present invention;
FIG. 9 is a schematic view of the pump and alarm module of the present invention;
FIG. 10 is a diagram illustrating an exemplary arrangement of the detection device and the pump and alarm module of the present invention.
In the figure: 1. a detection device; 2. an air duct; 3. an interface; 4. a processor and controller module; 5. a gas detection sensor; 6. an exhaust fan; 7. a motor; 8. an interface selection housing; 81. a cover body; 82. an iron top cover; 83. an air flow groove; 84. a lace wheel; 9. an electromagnet; 10. an elastic wheel; 101. a slide bar; 102. a spring; 103. positioning wheels; 11. a lower limit clamp; 12. an upper limit clamp; 121. a ball bearing; 13. an air extraction and alarm module; 131. an air exhaust pipe; 132. an alarm lamp; 133. a buzzer.
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, and not all of the embodiments. 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.
As shown in fig. 1 to 10, in an embodiment of the present invention, a method for detecting flammable gas in a hazardous chemical storage area includes the following steps:
the first step is as follows: firstly, laying air extraction and alarm modules on the roof of a storage area, wherein the adjacent air extraction and alarm modules are laid equidistantly, the final distribution form of the laid air extraction and alarm modules is determined according to the house type of civil design of the storage area, a detection device is arranged at the relative central position of the roof of the storage area, a port of the detection device is required to be communicated with an air extraction pipe of the air extraction and alarm modules through a long and thin hose, the number of the air extraction and alarm modules is not strictly regulated, when the space of the storage area is larger, a plurality of air extraction and alarm modules can be laid equidistantly, but the maximum number of the air extraction and alarm modules is not more than sixteen because the arrangement of more air extraction and alarm modules can increase the time length and uncertainty of the subsequent judgment process, and the device can control the judgment time to be minimum to avoid errors to the maximum extent only when inflammable gas can be rapidly dispersed in the air, therefore, the number of the air exhaust and alarm modules is not too large, and a distribution mode of the air exhaust and alarm modules and the detection device is shown in the figure;
the second step is that: the extraction fan can extract air in each part of the space of the storage area, the air flow enters the extraction pipe and is conveyed to the air pipe through the slender hose and the communicated inner cavity of the detection device, the air flow flows through the gas detection sensor and is detected through the gas detection sensor, when flammable gas contained in the air flow exceeds the standard, the processor and the controller module control the extraction fan to be powered on, the interface selection cover which is originally positioned at the lower part of the inner cavity of the detection device is attracted by the extraction fan to move upwards, the interface selection cover only partially seals and conducts the interfaces distributed on the surface of the detection device, the interfaces outside the detection device are communicated with the extraction pipe, if the number of the air extraction and alarm modules which are not arranged in the storage area is less than sixteen, the interfaces which are not communicated with the extraction pipe are sealed, when the gas detection sensor detects that the flammable gas which exceeds the standard is contained in the storage area at first time, the processor and the controller module power on the electromagnet, the electromagnet has magnetic force to suck the interface selection cover up, at the moment, the airflow groove on the surface of the interface selection cover is only communicated with one interface, so that only the air suction and alarm module communicated with the interface can collect gas normally, and the airflow speed in the passage is accelerated due to the increase of the air inlet amount, so that the detection device can quickly collect the gas, detect the gas pertinently and record the concentration of the inflammable gas in the region, so that the subsequent comparison is carried out, and the rest interfaces are all blocked by the outer peripheral surface of the cover body, so that the air suction and alarm modules of other parts cannot collect the gas;
the third step: the motor controls the interface selection cover to rotate, and the communicated interfaces are switched one by one, so that the detection device can check the single air flow sucked by one air suction and alarm module one by one, namely, the gases in each part of the storage area are screened one by one until all the gases are screened;
the fourth step: the processor and controller module compares the concentration of inflammable gas contained in the gas of each part to obtain the part of the storage area corresponding to the gas with the maximum concentration, and controls the part to exhaust gas and controls the alarm lamp and the buzzer on the alarm module to flash and buzz to alarm respectively.
Wherein, set up in sixteen interfaces 3 on detection device 1 surface, fixed intercommunication in detection device 1's tuber pipe 2, set up gaseous detection sensor 5 and the extraction fan 6 in 2 inner chambers of tuber pipe, carry out the treater and the controller module 4 that control, its characterized in that to gaseous detection sensor 5 and extraction fan 6 including detection device 1, equidistance: an interface selection cover 8 is sleeved in an inner cavity of the detection device 1, a motor 7 controlled by the processor and controller module 4 is arranged at the bottom of the inner cavity of the detection device 1, a main shaft of the motor 7 penetrates through the interface selection cover 8 and is in transmission fit with the interface selection cover 8, a lower limit card 11 and an upper limit card 12 are arranged on the wall of the inner cavity of the detection device 1, the interface selection cover 8 is always positioned between the lower limit card 11 and the upper limit card 12, an electromagnet 9 is also arranged at the top of the inner cavity of the detection device 1, air suction and alarm modules 13 are distributed around the detection device 1 at equal height, the motor 7 does not rotate in an initial state, clamping teeth arranged on the main shaft of the motor 7 can be clamped with upper and lower through grooves of the interface selection cover 8, so that the interface selection cover 8 can move up and down along the main shaft of the motor 7 and can also be clamped with the through grooves of the interface selection cover 8 through the clamping teeth to drive the interface selection cover 8 to rotate;
air exhaust and alarm module 13 are including exhaust tube 131, alarm lamp 132 and buzzer 133 in exhaust tube 131 both sides through the mounting bracket rigid coupling, exhaust tube 131 passes through long and thin hose and the switch-on of interface 3, exhaust tube 131 and alarm lamp 132 all receive treater and controller module 4 control, alarm lamp 132 is the red light lamp, it presents after opening and twinkles the regional red light that shines of below, it is regional to cover the below, this regional combustible gas concentration of suggestion staff is highest, the key is checked to the chemical that this region was deposited, the buzzer siren then can outwards take place the sound, play the effect of guiding the staff equally.
Wherein, go up spacing card 12 and set up in the top of interface selection cover 8 and be located the below of electro-magnet 9, go up spacing card 12 and electro-magnet 9 apart from a millimeter in vertical direction, the annular equidistance movable mounting in the bottom of going up spacing card 12 has ten balls 121, goes up spacing card 12 and restricts the vertical removal height of interface selection cover 8 as, and it can avoid interface selection cover 8 directly to take place the contact with electro-magnet 9.
Wherein, the interface selection cover 8 comprises a cover body 81, an iron top cover 82 fixedly arranged at the top of the cover body 81, an airflow groove 83 arranged on the outer peripheral surface of the cover body 81, and a lace wheel 84 fixedly arranged at the bottom of the cover body 81, the outer peripheral surface of the cover body 81 is in contact with the inner wall of the detection device 1 in an attaching manner, the upper limit of the movement of the interface selection cover 8 in the vertical direction is that the top surface of the iron top cover 82 is in contact with the ball 121 at the bottom of the upper limit card 12, the lower limit of the movement of the interface selection cover 8 in the vertical direction is that the bottom surface of the cover body 81 is in contact with the top surface of the lower limit card 11, the iron top cover 82 on the interface selection cover 8 is made of iron, so that the interface selection cover 8 can be attracted by the electromagnet 9 to drive the whole interface selection cover 8 to ascend, the iron top cover 82 can be in contact with the ball 121 finally, and the ball 121 can roll in cooperation with the rotation of the iron top cover 82 when the interface selection cover 8 rotates, so as to replace the sliding friction or other friction situations, the rotational resistance of the mouthpiece selection cover 8 is reduced.
When the interface selection cover 8 is located at the upper limit of the vertical movement, the airflow groove 83 is aligned and communicated with one interface 3, the rest interfaces 3 are blocked by the outer peripheral surface of the cover body 81, when the interface selection cover 8 is located at the lower limit of the vertical movement, the interface selection cover 8 is always located below the interfaces 3, and in an initial state, the interface selection cover 8 is located at the top of the lower limit card 11 and cannot move downwards continuously due to the limit of the lower limit card 11.
Wherein, the surface of iron top cap 82 is seted up the bleeder vent of the inner chamber of intercommunication cover body 81 and external environment, and the gas that exhaust tube 131 collected gets into from the interface 3 that corresponds after the pipeline route is carried to in the inner chamber of interface selection cover 8 is inputed, give priority to and export the inner chamber space of the detection device 1 that covers 8 top from the bleeder vent of iron top cap 82 to the interface, the aquatic enters into tuber pipe 2, and the air current can pass through the detection of gaseous detection sensor 5.
Wherein, the peripheral surface of the lace wheel 84 is provided with arc teeth with the number equal to that of the interfaces 3.
Wherein, still be equipped with the elasticity wheel 10 in the inner chamber of detection device 1, the elasticity wheel 10 includes the slide bar 101 of activity joint in detection device 1 casing, the spring 102 of slide bar 101 surface is located to the cover, fixed connection is in the locating wheel 103 of slide bar 101 inner, the both ends elastic support of slide bar 101 is in the inner wall of locating wheel 103 and detection device 1, when interface selection cover 8 vertical migration, locating wheel 103 contacts with lace wheel 84 all the time, the height ratio of lace wheel 84, so when lace wheel 84 rose, even the locating wheel 103 also can not break away from with the lace takes place sliding friction between wheel 84.
Wherein, when the cover 8 is selected to the interface stabilizes the irrotational, the wheel body block of locating wheel 103 is between two adjacent arc tooth of lace wheel 84, when lace wheel 84 is rotatory, locating wheel 103 can roll at lace wheel 84's outer peripheral face along lace wheel 84's arc tooth, when lace wheel 84 pivoted angle appearance error, locating wheel 103 can only contact with an arc tooth, and an arc tooth can not provide stable support to locating wheel 103, locating wheel 103 makes the arc tooth atress rather than the contact rotate owing to the elasticity of spring can move forward, final locating wheel 103 contacts with another arc tooth and reaches and form the atress balance between two arc tooth and the locating wheel 103, then lace wheel 84 drives the whole rotation angle of interface selection cover 8 and corrects.
The air flow groove 83 is necessarily aligned with one of the ports 3 in the vertical direction in the initial state, so that it is ensured that the air flow groove 83 is directly aligned with one of the ports 3 after rising, and then the air flow groove 83 can conduct the port 3 and close the other ports 3.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for detecting flammable gas in a hazardous chemical storage area is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: firstly, laying air extraction and alarm modules on the roof of a storage area, wherein the adjacent air extraction and alarm modules are laid at equal intervals, the distribution form of the finally laid air extraction and alarm modules is determined according to the house type of civil engineering design of the storage area, a detection device is arranged at the relative central position of the roof of the storage area, and a connector of the detection device is communicated with an air extraction pipe of the air extraction and alarm modules through a long and thin hose;
the second step is that: the air extracting fan can extract air in each part of the space of the storage area, air flow enters the air extracting pipe and is conveyed into the air pipe through the elongated hose and the communicated inner cavity of the detection device, the air flow flows through the gas detection sensor and is detected through the gas detection sensor, the processor and the controller module control the power on of the air extracting fan when flammable gas contained in the air flow exceeds the standard, the interface selection cover which is originally positioned at the lower part of the inner cavity of the detection device is attracted by the air extracting fan to move upwards, and the interface selection cover partially seals and only keeps one communication for the interface distributed on the surface of the detection device;
the third step: the motor controls the interface selection cover to rotate, and the communicated interfaces are switched one by one, so that the detection device can check the single air flow sucked by one air suction and alarm module one by one, namely, the gases in each part of the storage area are screened one by one until all the gases are screened;
the fourth step: the processor and controller module compares the concentration of inflammable gas contained in the gas of each part to obtain the part of the storage area corresponding to the gas with the maximum concentration, and controls the part to exhaust gas and controls the alarm lamp and the buzzer on the alarm module to flash and buzz to alarm respectively.
2. The device for detecting and alarming flammable gas in the storage area of the hazardous chemical substance in claim 1 comprises a detection device (1), sixteen interfaces (3) equidistantly arranged on the surface of the detection device (1), an air pipe (2) fixedly communicated with the detection device (1), a gas detection sensor (5) and an exhaust fan (6) arranged in the inner cavity of the air pipe (2), and a processor and controller module (4) for controlling the gas detection sensor (5) and the exhaust fan (6), and is characterized in that: an interface selection cover (8) is sleeved in an inner cavity of the detection device (1), a motor (7) controlled by a processor and controller module (4) is arranged at the bottom of the inner cavity of the detection device (1), a main shaft of the motor (7) penetrates through the interface selection cover (8) and is in transmission fit with the interface selection cover (8), a lower limit card (11) and an upper limit card (12) are arranged on the wall of the inner cavity of the detection device (1), the interface selection cover (8) is always positioned between the lower limit card (11) and the upper limit card (12), an electromagnet (9) is further arranged at the top of the inner cavity of the detection device (1), and air suction and alarm modules (13) are distributed around the detection device (1) at equal height;
air exhaust and alarm module (13) including exhaust tube (131), alarm lamp (132) and buzzer (133) through mounting bracket rigid coupling in exhaust tube (131) both sides, exhaust tube (131) are put through with interface (3) through long and thin hose, exhaust tube (131) and alarm lamp (132) all receive treater and controller module (4) control.
3. The flammable gas detection alarm device for a hazardous chemical storage area of claim 2, wherein: go up spacing card (12) and set up in the top of interface selection cover (8) and be located the below of electro-magnet (9), go up spacing card (12) and be a millimeter apart from electro-magnet (9) in vertical direction, the annular equidistance movable mounting in bottom of going up spacing card (12) has ten balls (121).
4. The flammable gas detection alarm device for a hazardous chemical storage area of claim 3, wherein: the interface selection cover (8) comprises a cover body (81), an iron top cover (82) fixedly installed at the top of the cover body (81), an airflow groove (83) formed in the outer peripheral surface of the cover body (81), and a lace wheel (84) fixedly installed at the bottom of the cover body (81), wherein the outer peripheral surface of the cover body (81) is in contact with the inner wall of the detection device (1) in a fitting manner, the interface selection cover (8) is in contact with a ball (121) at the bottom of the upper limiting clamp (12) on the upper limit of the movement in the vertical direction, and the interface selection cover (8) is in contact with the bottom surface of the cover body (81) and the top surface of the lower limiting clamp (11) on the lower limit of the movement in the vertical direction.
5. The flammable gas detection alarm device for a hazardous chemical storage area of claim 4, wherein: when the interface selection cover (8) is located at the upper limit of movement in the vertical direction, the airflow groove (83) is aligned and communicated with one interface (3) and the other interfaces (3) are blocked by the outer peripheral surface of the cover body (81), and when the interface selection cover (8) is located at the lower limit of movement in the vertical direction, the interface selection cover (8) is always located below the interfaces (3).
6. The flammable gas detection alarm device for a hazardous chemical storage area of claim 4, wherein: and the surface of the iron top cover (82) is provided with air holes for communicating the inner cavity of the cover body (81) with the external environment.
7. The flammable gas detection alarm device for a hazardous chemical storage area of claim 4, wherein: the peripheral surface of the lace wheel (84) is provided with arc teeth with the number equal to that of the connectors (3).
8. The flammable gas detection alarm device for a hazardous chemical storage area of claim 2, wherein: still be equipped with elasticity wheel (10) in the inner chamber of detection device (1), elasticity wheel (10) are including movable joint in slide bar (101), the cover of detection device (1) casing locate spring (102), the locating wheel (103) of fixed connection in slide bar (101) inner of slide bar (101) surface, the both ends elastic support of slide bar (101) is in the inner wall of locating wheel (103) and detection device (1), when cover (8) vertical removal is selected to the interface, locating wheel (103) contact with lace wheel (84) all the time.
9. The apparatus of claim 8, wherein the apparatus comprises: when the interface selection cover (8) is stable and does not rotate, the wheel body of the positioning wheel (103) is clamped between two adjacent arc-shaped teeth of the lace wheel (84).
10. The flammable gas detection alarm device for a hazardous chemical storage area of claim 4, wherein: the air flow groove (83) is necessarily aligned with one of the ports (3) in the vertical direction in the initial state.
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| CN117783454A (en) * | 2024-02-28 | 2024-03-29 | 陕西省环境监测中心站 | Pollution source organic gas detection device for real-time quantitative detection |
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