CN102338796B - Equipment for detecting concentration of combustible gas in silo - Google Patents
Equipment for detecting concentration of combustible gas in silo Download PDFInfo
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- CN102338796B CN102338796B CN201110210645.4A CN201110210645A CN102338796B CN 102338796 B CN102338796 B CN 102338796B CN 201110210645 A CN201110210645 A CN 201110210645A CN 102338796 B CN102338796 B CN 102338796B
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Abstract
The invention discloses equipment for detecting the concentration of combustible gas in a silo. The equipment comprises a gas collection device and a gas analysis device (20), wherein the gas collection device comprises at least one gas collection head (11) for collecting gas from at least one silo, a gas pump (12) and a first electromagnetic directional valve (13); the at leas one gas collection head (11) is connected with the inlet of the gas pump (12) through a pipeline; the outlet of the gas pump (12) is connected with the inlet of the first electromagnetic directional valve (13); the gas analysis device (20) is used for receiving the gas output by the outlet of the first electromagnetic directional valve (13) and collected by the at least one gas collection head (11), detecting the composition and concentration of the combustible gas in the gas, and outputting a signal indicating the composition and concentration. The equipment provided by the invention can detect the concentration of the combustible gas in the silo.
Description
Technical field
The present invention relates to a kind of equipment for detection of concentration of combustible gas in silo.
Background technology
Silo is the facility for storing loose unpacked material, has the advantages such as easy to use, protection of the environment and minimizing occupation of land.But at harbour, never apply silo, be especially used for storing the coal storage silo of coal.Coal storage silo should be noted that the problem of silo spontaneous combustion and blast.Because the coefficient of heat conductivity of coal is little, heat is slower to surrounding diffusion, and heat accumulation makes dump internal temperature raise in dump.When temperature raises, dump can discharge inflammable gas, for example carbon monoxide (CO), ethane (C
2h
6), propane (C
3h
8), the appearance of inflammable gas can characterize the temperature of dump.In addition, these inflammable gass mix with air, after temperature, combustable gas concentration and dust concentration reach certain numerical value, and will be explosion caused.Therefore, need to detect at any time the concentration of the inflammable gas in silo.
Summary of the invention
The object of this invention is to provide a kind of equipment that can detect the combustable gas concentration in silo.
To achieve these goals, the invention provides a kind of equipment for detection of concentration of combustible gas in silo, this equipment comprises: gas collecting device, this gas collecting device comprises at least one gas production head, air pump, the first solenoid directional control valve for gather gas from least one silo, described at least one gas production head is connected with the entrance of described air pump via pipeline, and this gas delivery side of pump is connected to the entrance of described the first solenoid directional control valve; Gas analyzing apparatus, this gas analyzing apparatus is for receiving from the gas being gathered by described at least one gas production head of the outlet output of described the first solenoid directional control valve, detect composition and the concentration of inflammable gas in this gas, and the signal of output this composition of indication and concentration.
Gas production head can be arranged in silo, air pump is used for providing power, under the power that gas in silo provides at air pump, can via pipeline, be drawn into gas analyzing apparatus by gas production head, gas analyzing apparatus can detect composition and the concentration of inflammable gas in this gas, and the signal of output this composition of indication and concentration.Thus, equipment provided by the invention can detect the concentration of inflammable gas in silo.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is according to the general frame of the equipment for detection of concentration of combustible gas in silo of an embodiment of the invention;
Fig. 2 is according to the structured flowchart of the gas analyzing apparatus of an embodiment of the invention;
Fig. 3 is according to the structured flowchart of the gas analyzing apparatus of an embodiment of the invention;
Fig. 4 is according to the structured flowchart of the gas analyzing apparatus of an embodiment of the invention;
Fig. 5 is according to the structured flowchart of the gas collecting device of an embodiment of the invention;
Fig. 6 is the structured flowchart of gas collecting device according to another implementation of the invention;
Fig. 7 is according to the structured flowchart of the gas collecting device of replaceable embodiment of the present invention; And
Fig. 8 is according to the structured flowchart of the gas collecting device of replaceable embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
As shown in Figure 1, according to an embodiment of the invention, provide a kind of equipment for detection of concentration of combustible gas in silo, this equipment comprises:
Gas collecting device, this gas collecting device comprises at least one gas production for gather gas from least one silo 11, air pump 12, the first solenoid directional control valve 13, described at least one gas production 11 is connected with the entrance of described air pump 12 via pipeline, and the outlet of this air pump 12 is connected to the entrance of described the first solenoid directional control valve 13;
Specifically, as shown in Figure 2, described gas analyzing apparatus 20 can comprise:
Described pretreatment unit 21 can be to well known to a person skilled in the art the moisture that can remove in gas and the device of dust.For example pretreatment unit 21 can comprise metal filter screen, for filtering out the dust of passed through gas, and the such as coal dust in silo etc.Pretreatment unit 21 can also comprise gas flow dryer, for removing the steam of gas.
Sensor in described sensing chamber 23 can be the sensor well known to a person skilled in the art for detection of combustable gas concentration, for example catalytic combustion-type sensor.This sensor can detect the concentration of multiple gases, for example CO, CH
4, C
2h
4, C
2h
6, CH
3cH
2cH
3deng.
Preferably, described pretreatment unit 21 can also comprise cooling device (not shown), for described gas is lowered the temperature.
In the preferred embodiment of the present invention, described gas analyzing apparatus 20 can also comprise that the entrance and exit that is arranged on the 3rd air pump 22, the three air pumps 22 between described pretreatment unit 21 and sensing chamber 23 is connected with the outlet of described pretreatment unit 21 and the entrance of sensing chamber 23 respectively.The 3rd air pump 22 is for providing power to make this gas be transported to sensing chamber 23 with certain pressure and flow to the described gas of exporting from pretreatment unit 21.
As shown in Figure 3, according to the preferred embodiment of the present invention, described gas analyzing apparatus 20 can also comprise blowback unit, and this blowback unit comprises:
Be arranged on the 4th solenoid directional control valve 24 on the pipeline between described pretreatment unit 21 and the 3rd air pump 22 and be arranged on the 5th solenoid directional control valve 25 on the pipeline between described the 3rd air pump 22 and described sensing chamber 23, the entrance of the 4th solenoid directional control valve 24 is connected with the outlet of described pretreatment unit 21, the first outlet of the 4th solenoid directional control valve 24 is connected with the entrance of described the 3rd air pump 22, the outlet of the 3rd air pump 22 is connected with the entrance of described the 5th solenoid directional control valve 25, the first outlet of the 5th solenoid directional control valve 25 is connected with the entrance of described sensing chamber 23, the second outlet of the 5th solenoid directional control valve 25 is connected with the second outlet of described the 4th solenoid directional control valve 24.
Described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 can be the known solenoid directional control valves at least with two-position three way ability of ability technician, for example, two position, three-way electromagnetic change valve, two-position four-way solenoid directional control valve, 3-position 4-way solenoid directional control valve etc.
Described equipment can also comprise controller 30, the control end of controller 30 can be electrically connected with the controlled end of the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25, this controller 30 can move for controlling described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25, makes between described pretreatment unit 21 and the 3rd air pump 22 conducting between conducting and the 3rd air pump 22 and described sensing chamber 23.Described controller 30 can include but not limited to: microcontroller, dsp chip, PLC controller, FPGA circuit etc.
After completing for the detection of a gas production 11 gas that gather, controller 30 can control the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the second outlet conducting with the first outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the second outlet conducting with the first outlet conducting, now, blowback unit is in running order.Like this, in the situation that the 3rd air pump 22 provides power, the pipeline of gas analyzing apparatus 20 is carried out to blowback, to remove the gas remaining in wherein.For blowback provides the mode of purge gas, can have a variety of.For example, the entrance of the 3rd air pump 22 can be connected to a source of the gas, the such as (not shown) such as air-source, source nitrogen, source of the gas conventionally with the 3rd air pump 22 in not on-state.When the entrance of the 4th solenoid directional control valve 24 described above is when transforming to the second outlet conducting with the first outlet conducting, source of the gas and the 3rd air pump 22 conductings are (for example, can be under the control of controller 30), thus purge gas is provided to the 3rd air pump 22.When the entrance of the 4th solenoid directional control valve 24 is during again with the first outlet conducting, source of the gas and the 3rd air pump 22 not conductings (for example, can under the control of controller 30).Again for example, the entrance of the 3rd air pump 22 can also be connected with a solenoid valve, this solenoid valve and external environment connect, controller 30 (or other control systems) can be controlled the ON/OFF of this solenoid valve and the 3rd air pump 22, and the time of ON/OFF can be identical with the ON/OFF of above-mentioned source of the gas with order.In sum, when carrying out blowback operation, thereby source of the gas and solenoid valve and the 3rd air pump 22 conductings provide purge gas; When blowback EO, thereby source of the gas and solenoid valve and the 3rd air pump 22 disconnect and do not affect normal detection operation.Be understandable that, the mode that the invention provides purge gas is not limited to this, and other modes that described those skilled in the art can be contemplated to also can be applicable to the present invention.
In blowback, reach after predetermined amount of time, controller 30 can control the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the first outlet conducting with the second outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the first outlet conducting with the second outlet conducting, blowback unit is again in duty not thus.Described predetermined amount of time can be set flexibly according to field working conditions, can set this predetermined amount of time by the timer in controller 30.In the preferred embodiment of the present invention, the scope of described predetermined amount of time can be 20 minutes-30 minutes.
In addition can also control, the flow of the gas that enters sensing chamber 23.In order to realize this object, as shown in Figure 4, according to a preferred embodiment of the present invention, described gas analyzing apparatus 20 can also comprise:
Be arranged on the flowmeter 26 between the first outlet and the entrance of described sensing chamber 23 of described the 5th solenoid directional control valve 25, for detection of the flow of described gas that enters into this sensing chamber 23, and export corresponding flow signal;
Flow controlling unit 27 between the first outlet that is arranged on described the 5th solenoid directional control valve 25 and described flowmeter 26, for receive described flow signal and according to this flow signal by the flow control of gas that enters into described sensing chamber 23 at a preset value.
Described flowmeter 26 and flow controlling unit 27 can be to well known to a person skilled in the art device, and described preset value can be below 1 liter/min.
Different embodiment about gas collecting device is described below.
Fig. 5 is according to the structured flowchart of the gas collecting device of an embodiment of the invention.As shown in Figure 5, in an embodiment of the invention, described gas production 11 can be multiple, and one or more gas production 11 can be arranged in a silo.Described gas collecting device can also comprise the second solenoid directional control valve 14, a gas production in described multiple gas production 11 11 is connected with an entrance of this second solenoid directional control valve 14 via pipeline, the outlet of this second solenoid directional control valve 14 is connected with the entrance of described air pump 12, the outlet of air pump 12 is connected to the entrance of the first solenoid directional control valve 13, and the outlet of the first solenoid directional control valve 13 is connected with the entrance of above-mentioned pretreatment unit 21.Should can also comprise controller 30 for detection of the equipment of concentration of combustible gas in silo, the control end of controller 30 can be electrically connected with the controlled end of the second solenoid directional control valve 14 and the first solenoid directional control valve 13.Controller 30 can be controlled this second solenoid directional control valve 14 and move, and makes an entrance and its outlet conducting of this second solenoid directional control valve 14, and other entrance and its outlet disconnect.When being powered, air pump 12 starts working, gas production 11 gas that start to gather in silo that are connected with an entrance of the outlet conducting of the second solenoid directional control valve 14, and under the effect of air pump 12, be transported to pretreatment unit 21, through supercooling, dewater and dedusting after, under the effect of the 3rd air pump 22, be transported to sensing chamber 23, sensor in sensing chamber 23 starts to detect composition and the concentration of the inflammable gas in this gas, and the signal of output corresponding indication composition and concentration.Processor (not shown) receives this signal, and this signal is processed, and an output display shows composition and the concentration of inflammable gas afterwards.Described processor can include but not limited to: microcontroller, dsp chip, PLC controller, FPGA circuit etc.
When to after finishing from the detection of this gas production 11 gas that gather, controller 30 can be controlled the second electromagnetic switch valve events, the outlet of this second solenoid directional control valve 14 is switched to and another entrance conducting, starts thus from another gas production 11 collection gas.After having detected for the gas of a gas production 11, controller 30 can be controlled the second solenoid directional control valve 14 and move to make the outlet of this second solenoid directional control valve 14 to be switched to and next entrance conducting, makes next gas production in multiple gas production 11 11 by next entrance and its outlet conducting of the second solenoid directional control valve 14.Circulation successively, can realize single channel circulation and measure.Before the entrance of above-mentioned the second solenoid directional control valve 14 switches, wish to use blowback unit to remove the residual gas in the pipeline of gas analyzing apparatus 20.Thus, controller 30 can also be used for control outlet that the second solenoid directional control valve 14 moves to make this second solenoid directional control valve 14 from an entrance conducting be switched to next entrance conducting before, controlling described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the second outlet conducting with the first outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the second outlet conducting with the first outlet conducting; And after a predetermined amount of time, controlling described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the first outlet conducting with the second outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the first outlet conducting with the second outlet conducting.Can avoid like this gases that gather from another gas production 11 and remain in before gas gas analyzing apparatus 20 and mix and affect accuracy of detection.
Although two gas production 11 have been shown in Fig. 5, and Fig. 5 is exemplary, it will be understood by those skilled in the art that gas collecting device can comprise the gas production 11 of any amount.
Fig. 6 is the structured flowchart of gas collecting device according to another implementation of the invention.As shown in Figure 6, in replaceable embodiment of the present invention, described air pump 12 can comprise 12: the first air pumps 121 of two air pumps and the second air pump 122.The outlet of this first air pump 121 is connected with the first entrance of described the first solenoid directional control valve 13, and the outlet of this second air pump 122 is connected with the second entrance of this first solenoid directional control valve 13;
The control end of described controller 30 can also be electrically connected with the controlled end of the first solenoid directional control valve 13, this controller 30 moves for controlling described the first solenoid directional control valve 13, and the outlet of this first solenoid directional control valve 13 is replaced and the first entrance and the second entrance conducting.Here, described the first solenoid directional control valve 13 can be the known solenoid directional control valve at least with two-position three way ability of ability technician, for example, and two position, three-way electromagnetic change valve, two-position four-way solenoid directional control valve, 3-position 4-way solenoid directional control valve etc.Alternatively, it will be understood by those skilled in the art that in this embodiment, the first solenoid directional control valve 13 can be replaced by the solenoid directional control valve of two bi-bit bi-pass.
As shown in Figure 6, in an embodiment of the invention, described gas collecting device can also comprise the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15, this second solenoid directional control valve 14 is on the pipeline between described gas production 11 and the first air pump 121, and the 3rd solenoid directional control valve 15 is on the pipeline between described gas production 11 and the second air pump 122; Described gas production 11 is for multiple gas production 11 and be divided into two groups, a gas production in first group of gas production 11 11 is connected with an entrance of the second solenoid directional control valve 14 via pipeline, a gas production in second group of gas production 11 11 is connected with an entrance of the 3rd solenoid directional control valve 15 via pipeline, and the outlet of the outlet of the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 is connected with the entrance of the first air pump 121 and the entrance of the second air pump 122 respectively.In this embodiment, described the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 have multiple entrances, and each entrance and a gas production 11 is connected.Therefore the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 can be two N electric change valves.In this embodiment, the control end of described controller 30 can also be connected with the controlled end of the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15, and this controller 30 can also be used for controlling described the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 moves, to select an entrance and its outlet conducting of the second solenoid directional control valve 14, and an entrance and its outlet conducting of selection the 3rd solenoid directional control valve 15; Described controller 30 is also for being transformed to and controlled described the second solenoid directional control valve 14 disconnection and move by conducting in the first entrance of described the first solenoid directional control valve 13 and its outlet, to select another entrance and its outlet conducting of this second solenoid directional control valve 14; Or in the second entrance of described the first solenoid directional control valve 13 and its outlet, by conducting, transform to and disconnection, control described the 3rd solenoid directional control valve 15 and move, to select another entrance and its outlet conducting of the 3rd solenoid directional control valve 15.In this embodiment, use two air pumps 12 (i.e. the first air pump 121 and the second air pump 122) from two gas production, a 11 collection gas.Distant due to silo at the scene and gas analyzing apparatus 20 intervals, therefore the pipeline between gas production 11 and air pump 12 is longer, from gas production 11 gas that gather, be transported to air pump 12 and need the regular hour, if only adopt an air pump 12 from gas production 11 gas that extract in silo, when being switched to another gas production 11 from a gas production 11, need to wait for that gas is transported to air pump 12 from another gas production 11.Adopt two air pumps 12, can, being transported to gas analyzing apparatus 20 with when detecting from first gas production 11 gas that gather, utilize second air pump 12 from next gas production 11 extracting gases, but not flow to gas analyzing apparatus 20.Like this detection of the gases for gathering from first gas production 11 completes, controller 30 is controlled the first solenoid directional control valve 13 and is moved, make second air pump 12 and gas analyzing apparatus 20 conductings, by second air pump 12, from next gas production 11 gas that extract, be transported to immediately gas analyzing apparatus 20, thus, can save time.Meanwhile, first air pump 12 disconnects with gas analyzing apparatus 20.When above-mentioned the first solenoid directional control valve 13 of control moves, another entrance and its outlet conducting of this second solenoid directional control valve 14 controlled the second solenoid directional control valve 14 and move to select by controller 30, and this first air pump 12 starts gas production 11 extracting gases from being connected with this another entrance.By controller 30 being set to predetermined steering order sequential, just can realize the single-point cycle detection for multiple gas production 11, i.e. composition and the concentration of the inflammable gas of one-time detection from a gas production 11 gas that gather.Can utilize two air pumps 12 to shorten the waiting time of carrying out next round detection simultaneously.
In this embodiment, if the quantity of gas production 11 is larger, for example 16 gas production 11, even if be divided into two groups, the gas production of each group 11 quantity also have 8.The entrance quantity of such the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 is also 8 accordingly.Although technical, can realize, bring difficulty to undoubtedly the manufacture of the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15.Therefore this embodiment is relatively applicable to a gas production few situation of 11 quantity.Fig. 7 shows the replaceable embodiment of gas collecting device.As shown in Figure 7, in the present embodiment, described gas collecting device can comprise the second solenoid directional control valve group 16 and the 3rd solenoid directional control valve group 17, this the second solenoid directional control valve group 16 is on the pipeline between described gas production 11 and described the first air pump 121, and this second solenoid directional control valve group 16 is on the pipeline between described gas production 11 and described the second air pump 122; Described gas production 11 is for multiple gas production 11 and be divided into two groups, a gas production in first group of gas production 11 11 is connected with the entrance of a solenoid directional control valve in the second solenoid directional control valve group 16 via pipeline, a gas production in second group of gas production 11 11 is connected with the entrance of a solenoid directional control valve in the 3rd solenoid directional control valve group 17 via pipeline, and the outlet of the outlet of the solenoid directional control valve in the second solenoid directional control valve group 16 and the solenoid directional control valve in the 3rd solenoid directional control valve group 17 is connected with the entrance of the first air pump 121 and the entrance of the second air pump 122 respectively.In this embodiment, by the second solenoid directional control valve group 16 and the 3rd solenoid directional control valve group 17, replace respectively the second solenoid directional control valve 14 and the 3rd solenoid directional control valve 15 in previous embodiment.Here, the solenoid directional control valve in the second solenoid directional control valve group 16 and the 3rd solenoid directional control valve group 17 is just passable as long as having the solenoid directional control valve of bi-bit bi-pass ability.In this embodiment, the control end of described controller 30 is also electrically connected with the controlled end of the solenoid directional control valve in the second solenoid directional control valve group 16 and the 3rd solenoid directional control valve group 17, this controller 30 also moves for controlling described the second solenoid directional control valve group 16 and the 3rd solenoid directional control valve group 17, to select a solenoid directional control valve conducting in the second solenoid directional control valve group 16, and select a solenoid directional control valve conducting in the 3rd solenoid directional control valve group 17; Described controller 30 is also for being transformed to and controlled described the second solenoid directional control valve group 16 disconnection and move by conducting in the first entrance of described the first solenoid directional control valve 13 and its outlet, to select another solenoid directional control valve conducting in this second solenoid directional control valve group 16; Or in the second entrance of described the first solenoid directional control valve 13 and its outlet, by conducting, transform to and disconnection, control described the 3rd solenoid directional control valve group 17 and move, to select another solenoid directional control valve conducting in the 3rd solenoid directional control valve group 17.
Although four gas production 11 have been shown in Fig. 7 and Fig. 8, have it will be understood by those skilled in the art that gas collecting device can comprise the gas production 11 of any amount.
In another interchangeable embodiment, as shown in Figure 8, described gas collecting device comprises the second solenoid directional control valve group 16, and this second solenoid directional control valve group 16 is on the pipeline between described gas production 11 and described the first air pump 121 and the second air pump 122; Described gas production 11 is multiple gas production 11, a gas production in multiple gas production 11 11 is connected to the entrance of a solenoid directional control valve in this second solenoid directional control valve group 16 via pipeline, first outlet and second of this solenoid directional control valve exports and is connected respectively to the entrance of described the first air pump 121 and the entrance of the second air pump 122.In this embodiment, solenoid directional control valve in described the second solenoid directional control valve group 16 can be the solenoid directional control valve with any type of two-position three way ability, such as two position, three-way electromagnetic change valve, two-position four-way solenoid directional control valve, 3-position 4-way solenoid directional control valve etc.In this embodiment, the control end of described controller 30 is also electrically connected with the controlled end of the solenoid directional control valve in the second solenoid directional control valve group 16, this controller 30 also moves for controlling described the second solenoid directional control valve group 16, to select a gas production in described gas production 11 11 and described the first air pump 121 conductings and to select another gas production 11 and described the second air pump 122 conductings; Described controller 30 is also for being transformed to and controlled described the second solenoid directional control valve group 16 disconnection and move by conducting in the first entrance of described the first solenoid directional control valve 13 and its outlet, never with the described gas production of described the first air pump 121 and the second air pump 122 conductings 11 to select a gas production 11 and described the first air pump 121 conductings; Or in the second entrance of described the first solenoid directional control valve 13 and its outlet, by conducting, transform to and disconnection, control described the second solenoid directional control valve group 16 and move, never with the described gas production of described the first air pump 121 and the second air pump 122 conductings 11 to select a gas production 11 and described the second air pump 122 conductings.
In the above embodiment, also can use blowback unit.Thus, described controller 30 is also for moving controlling described the first solenoid directional control valve 13, the outlet that makes this first solenoid directional control valve 13 alternately with the first entrance and the second entrance conducting before, carry out successively following operation:
Controlling described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the second outlet conducting with the first outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the second outlet conducting with the first outlet conducting;
After a predetermined amount of time, controlling described the 4th solenoid directional control valve 24 and the 5th solenoid directional control valve 25 moves, make the entrance of the 4th solenoid directional control valve 24 from transforming to and the first outlet conducting with the second outlet conducting, and make the entrance of the 5th solenoid directional control valve 25 from transforming to and the first outlet conducting with the second outlet conducting.
Although three solenoid directional control valves in three gas production 11 and the second solenoid directional control valve group 16 have been shown in Fig. 8, but this is exemplary, it will be appreciated by those skilled in the art that, described gas collecting device can comprise the gas production 11 of any amount, and the second solenoid directional control valve group 16 can comprise the solenoid directional control valve of any amount.
In addition, in the preferred embodiment of the present invention, described gas collecting device can also comprise accumulator and/or the surplus valve (not shown) on the pipeline on the pipeline being arranged between the outlet of described the first air pump 121 and the first entrance of described the first solenoid directional control valve 13 and/or between the outlet of described the second air pump 122 and the second entrance of described the first solenoid directional control valve 13.Accumulator is set, can be at the first air pump 121 or the second air pump 122 just from gas production 11 extracting gases but not with gas analyzing apparatus 20 conducting in the situation that, can be by the atmosphere storage extracting in accumulator; And being set, surplus valve can prevent that the gas extracting from accumulating and causing the air pressure in this pipeline excessive in pipeline between air pump 12 and the first solenoid directional control valve 13 owing to can not being transported to gas analyzing apparatus 20.
It will be understood by those skilled in the art that above each embodiment middle controller 30 can and can utilize the timer in controller 30 to realize by preset program to the control of various solenoid directional control valves.Controller 30 can generate various instructions according to preset program, and can set with timer the sequential of instruction.
In actual applications, the quantity of gas production 11 can be 16, and 2 gas production 11 can be set in each silo.By being transported to successively gas analyzing apparatus 20 from these gas production 11 gas that gather, detect one by one and analyze.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (14)
1. for detection of an equipment for concentration of combustible gas in silo, this equipment comprises:
Gas collecting device, this gas collecting device comprises at least one gas production head (11), air pump (12), the first solenoid directional control valve (13) for gather gas from least one silo, described at least one gas production head (11) is connected with the entrance of described air pump (12) via pipeline, and the outlet of this air pump (12) is connected to the entrance of described the first solenoid directional control valve (13);
Gas analyzing apparatus (20), this gas analyzing apparatus (20) is for receiving from the gas being gathered by described at least one gas production head (11) of the outlet output of described the first solenoid directional control valve (13), detect composition and the concentration of inflammable gas in this gas, and the signal of output this composition of indication and concentration;
Wherein, described air pump (12) comprises the first air pump (121) and the second air pump (122), the outlet of this first air pump (121) is connected with the first entrance of described the first solenoid directional control valve (13), and the outlet of this second air pump (122) is connected with the second entrance of this first solenoid directional control valve (13);
Described equipment also comprises controller (30), and this controller (30), for controlling described the first solenoid directional control valve (13) action, replaces and the first entrance and the second entrance conducting the outlet of this first solenoid directional control valve (13);
Described gas collecting device also comprises the second solenoid directional control valve group (16), and this second solenoid directional control valve group (16) is positioned on the pipeline between described gas production 11 and described the first air pump (121) and the second air pump (122); Described gas production head (11) is multiple gas production heads (11), a gas production head (11) in multiple gas production heads (11) is connected to the entrance of a solenoid directional control valve in this second solenoid directional control valve group (16) via pipeline, the first outlet and second outlet of this solenoid directional control valve are connected respectively to the entrance of described the first air pump (121) and the entrance of the second air pump (122).
2. equipment according to claim 1, wherein, described gas collecting device also comprises the second solenoid directional control valve (14) and the 3rd solenoid directional control valve (15), this second solenoid directional control valve (14) is positioned on the pipeline between described gas production head (11) and the first air pump (121), and the 3rd solenoid directional control valve (15) is positioned on the pipeline between described gas production head (11) and the second air pump 122; Described gas production head (11) is for multiple gas production heads (11) and be divided into two groups, a gas production head (11) in first group of gas production head (11) is connected with an entrance of the second solenoid directional control valve (14) via pipeline, a gas production head (11) in second group of gas production head (11) is connected with an entrance of the 3rd solenoid directional control valve (15) via pipeline, and the outlet of the outlet of the second solenoid directional control valve (14) and the 3rd solenoid directional control valve (15) is connected with the entrance of the first air pump (121) and the entrance of the second air pump (122) respectively.
3. equipment according to claim 2, wherein, described controller (30) is also for controlling described the second solenoid directional control valve (14) and the action of the 3rd solenoid directional control valve (15), to select an entrance and its outlet conducting of the second solenoid directional control valve (14), and an entrance and its outlet conducting of selection the 3rd solenoid directional control valve (15);
Described controller (30) is also transformed to disconnection and is controlled described the second solenoid directional control valve (14) action by conducting for the first entrance and its outlet at described the first solenoid directional control valve (13), to select another entrance and its outlet conducting of this second solenoid directional control valve (14); Or the second entrance and its outlet at described the first solenoid directional control valve (13) are transformed to disconnection and are controlled described the 3rd solenoid directional control valve (15) action by conducting, to select another entrance and its outlet conducting of the 3rd solenoid directional control valve (15).
4. equipment according to claim 1, wherein, described gas collecting device also comprises the second solenoid directional control valve group (16) and the 3rd solenoid directional control valve group (17), this the second solenoid directional control valve group (16) is positioned on the pipeline between described gas production head (11) and described the first air pump (121), and this second solenoid directional control valve group (16) is positioned on the pipeline between described gas production head (11) and described the second air pump (122), described gas production head (11) is for multiple gas production heads (11) and be divided into two groups, a gas production head (11) in first group of gas production head (11) is connected with the entrance of a solenoid directional control valve in the second solenoid directional control valve group (16) via pipeline, a gas production head (11) in second group of gas production head (11) is connected with the entrance of a solenoid directional control valve in the 3rd solenoid directional control valve group (17) via pipeline, the outlet of the outlet of the solenoid directional control valve in the second solenoid directional control valve group (16) and the solenoid directional control valve in the 3rd solenoid directional control valve group (17) is connected with the entrance of the first air pump (121) and the entrance of the second air pump (122) respectively.
5. equipment according to claim 4, wherein, described controller (30) is also for controlling described the second solenoid directional control valve group (16) and the action of the 3rd solenoid directional control valve group (17), to select a solenoid directional control valve conducting in the second solenoid directional control valve group (16), and select a solenoid directional control valve conducting in the 3rd solenoid directional control valve group (17); Described controller (30) is also transformed to disconnection and is controlled described the second solenoid directional control valve group (16) action by conducting for the first entrance and its outlet at described the first solenoid directional control valve (13), to select another solenoid directional control valve conducting in this second solenoid directional control valve group (16); Or the second entrance and its outlet at described the first solenoid directional control valve (13) are transformed to disconnection and are controlled described the 3rd solenoid directional control valve group (17) action by conducting, to select another solenoid directional control valve conducting in the 3rd solenoid directional control valve group (17).
6. equipment according to claim 1, wherein, described controller (30) is for controlling described the second solenoid directional control valve group (16) action, to select a gas production head (11) and described the first air pump (121) conducting in described gas production head (11) and to select another gas production head (11) and described the second air pump (122) conducting; Described controller (30) is also for being transformed to and controlled described the second solenoid directional control valve group (16) action disconnection by conducting in the first entrance of described the first solenoid directional control valve (13) and its outlet, never with the described gas production head (11) of described the first air pump (121) and the second air pump (122) conducting to select a gas production head (11) and described the first air pump (121) conducting; Or in the second entrance of described the first solenoid directional control valve (13) and its outlet, by conducting, transform to and disconnection, control described the second solenoid directional control valve group (16) action, never with the described gas production head (11) of described the first air pump (121) and the second air pump (122) conducting to select a gas production head (11) and described the second air pump (122) conducting.
7. equipment according to claim 1, wherein, described gas analyzing apparatus (20) comprising:
Pretreatment unit (21), its entrance is connected with the outlet of described the first solenoid directional control valve (13), and this pretreatment unit (21), for receiving the gas of described collection, dewaters and/or dedusting to this gas; With
Sensing chamber (23), its entrance is connected with the outlet of this pretreatment unit (21), this sensing chamber (23) is for receiving from the described gas of the outlet output of pretreatment unit (21), this sensing chamber has at least one group of sensor in (23), every group of sensor comprises at least one sensing unit (231), every group of sensor be for detection of the concentration of a kind of inflammable gas in described gas, and the signal of the concentration of the inflammable gas that detects of output indication.
8. equipment according to claim 7, wherein, described gas analyzing apparatus (20) also comprises:
Be arranged on the 3rd air pump (22) between described pretreatment unit (21) and described sensing chamber (23), the entrance and exit of the 3rd air pump (22) is connected with the outlet of described pretreatment unit (21) and the entrance of sensing chamber (23) respectively.
9. equipment according to claim 8, wherein, described gas analyzing apparatus (20) also comprises blowback unit, this blowback unit comprises:
Be arranged on the 4th solenoid directional control valve (24) on the pipeline between described pretreatment unit (21) and the 3rd air pump (22) and be arranged on the 5th solenoid directional control valve (25) on the pipeline between described the 3rd air pump (22) and described sensing chamber (23), the entrance of the 4th solenoid directional control valve (24) is connected with the outlet of described pretreatment unit (21), the first outlet of the 4th solenoid directional control valve (24) is connected with the entrance of described the 3rd air pump (22), the outlet of the 3rd air pump (22) is connected with the entrance of described the 5th solenoid directional control valve (25), the first outlet of the 5th solenoid directional control valve (25) is connected with the entrance of described sensing chamber (23), the second outlet of the 5th solenoid directional control valve (25) is connected with the second outlet of described the 4th solenoid directional control valve (24).
10. equipment according to claim 9, wherein, described controller (30) is also for controlling the action of described the 4th solenoid directional control valve (24) and the 5th solenoid directional control valve (25), makes between described pretreatment unit (21) and the 3rd air pump (22) conducting between conducting and the 3rd air pump (22) and described sensing chamber (23).
11. equipment according to claim 10, wherein, described controller (30) is being also for controlling described the first solenoid directional control valve (13) action, the outlet that makes this first solenoid directional control valve (13) alternately with the first entrance and the second entrance conducting before, carry out successively following operation:
Control described the 4th solenoid directional control valve (24) and the action of the 5th solenoid directional control valve (25), make the entrance of the 4th solenoid directional control valve (24) from transforming to and the second outlet conducting with the 4th solenoid directional control valve (24) first outlet conductings, and make the entrance of the 5th solenoid directional control valve (25) from transforming to and the second outlet conducting with the 5th solenoid directional control valve (25) first outlet conductings;
After a predetermined amount of time, control described the 4th solenoid directional control valve (24) and the action of the 5th solenoid directional control valve (25), make the entrance of the 4th solenoid directional control valve (24) from transforming to and the first outlet conducting with the 4th solenoid directional control valve (24) second outlet conductings, and make the entrance of the 5th solenoid directional control valve (25) from transforming to and the first outlet conducting with the 5th solenoid directional control valve (25) second outlet conductings.
12. equipment according to claim 11, wherein, the scope of described predetermined amount of time is 20-30 minute.
13. equipment according to claim 9, wherein, described gas analyzing apparatus (20) also comprises:
Be arranged on the flowmeter (26) between the first outlet and the entrance of described sensing chamber (23) of described the 5th solenoid directional control valve (25), for detection of the flow of described gas that enters into this sensing chamber (23), and export corresponding flow signal;
Flow controlling unit (27) between the first outlet that is arranged on described the 5th solenoid directional control valve (25) and described flowmeter (26), for the flow control of gas that receives described flow signal and will enter into described sensing chamber (23) according to this flow signal at a preset value.
14. according to the equipment described in any one in claim 1-13, wherein, described gas collecting device also comprises accumulator and/or the surplus valve on the pipeline on the pipeline being arranged between the outlet of described the first air pump (121) and the first entrance of described the first solenoid directional control valve (13) and/or between the outlet of described the second air pump (122) and the second entrance of described the first solenoid directional control valve (13).
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| CN201110210645.4A CN102338796B (en) | 2011-07-26 | 2011-07-26 | Equipment for detecting concentration of combustible gas in silo |
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| CN201110210645.4A CN102338796B (en) | 2011-07-26 | 2011-07-26 | Equipment for detecting concentration of combustible gas in silo |
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| CN104865369A (en) * | 2015-06-02 | 2015-08-26 | 谢博 | Gas concentration detecting component of combustible gas alarm |
| CN106442867A (en) * | 2016-06-03 | 2017-02-22 | 李智 | Combustible gas concentration detection method and detection device |
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| CN108489871A (en) * | 2018-06-22 | 2018-09-04 | 佛山瀚兽环境科技服务有限公司 | The monitoring device of on-line monitoring device is discharged for exhaust gas |
| CN110716008A (en) * | 2018-07-12 | 2020-01-21 | 四川赛恩思仪器有限公司 | Gas circuit structure for gas detector |
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