CN111766330B - Gas detection device and detection method - Google Patents
Gas detection device and detection method Download PDFInfo
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- CN111766330B CN111766330B CN202010620167.3A CN202010620167A CN111766330B CN 111766330 B CN111766330 B CN 111766330B CN 202010620167 A CN202010620167 A CN 202010620167A CN 111766330 B CN111766330 B CN 111766330B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/55—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers driven by the moving material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/87—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the receptacle being divided into superimposed compartments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
- B01F27/923—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws the material flowing continuously through the receptacle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/23—Mixing of laboratory samples e.g. in preparation of analysing or testing properties of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/32—Driving arrangements
- B01F35/32005—Type of drive
- B01F35/3203—Gas driven
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Abstract
The invention relates to the technical field of gas detection, and discloses a gas detection device and a gas detection method, wherein the gas detection device comprises a mixer, a to-be-detected gas conveying device, a cocatalyst gas conveying device and a catalytic combustion sensor, wherein a flow guide area and a mixing area are arranged in the mixer, a premix zone, a first gas guide area and a second gas guide area are formed in the mixing area, the to-be-detected gas conveying device is connected with the first gas guide area, the cocatalyst gas conveying device is connected with the second gas guide area and can convey cocatalyst gas into the premix zone, the to-be-detected gas and the cocatalyst gas are mixed in the premix zone to form mixed gas, and the mixed gas is guided to the catalytic combustion sensor through the flow guide area; the detection method comprises S1, conveying the gas to be detected and the cocatalyst gas into a mixer for mixing to obtain a gas sample to be detected; and S2, detecting the gas sample to be detected through the catalytic combustion sensor to obtain the concentration value of the combustible gas.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a gas detection device and a gas detection method.
Background
In order to ensure safety in industrial production and tests, the concentration of some gases in a flue used in industrial production needs to be detected. When the traditional technology detects the gas concentration of the gas in the flue, the infrared gas detector is used for multiple purposes, but in the using process, the gas concentration data detected by the infrared gas detector and the real gas concentration are easy to generate large errors due to the fact that the gas concentration in the flue is large.
Disclosure of Invention
The first objective of the present invention is to provide a gas detection device, so as to overcome the problem that the prior art directly detects high concentration gas and is prone to generate large error.
In order to achieve the above purpose, the basic scheme of the invention is as follows: a gas detection device comprises a mixer, gas conveying equipment to be detected, auxiliary catalysis gas conveying equipment and a catalytic combustion sensor for detecting gas, wherein the catalytic combustion sensor is arranged at the top of the mixer;
the mixer is internally provided with a partition plate, the partition plate divides the interior of the mixer into a flow guide area and a mixing area, a partition structure is arranged in the mixing area, the partition structure divides the mixing area into a premix area, a first air guide area and a second air guide area, the premix area is communicated with the flow guide area, and the first air guide area and the second air guide area are symmetrically arranged at two sides of the partition structure;
the separation structure comprises an annular plate and a side baffle plate, the space formed by enclosing the annular plate is a premix zone, and the side baffle plate separates the first air guide zone and the second air guide zone from each other; the annular plate is provided with a first air guide hole and a second air guide hole, the first air guide area is communicated with the premix zone through the first air guide hole, and the second air guide area is communicated with the premix zone through the second air guide hole;
the gas conveying equipment to be tested is connected with the first gas guide area and can convey gas to be tested to the first gas guide area, the cocatalyst gas conveying equipment is connected with the second gas guide area and can convey cocatalyst gas to the second gas guide area, when the gas to be tested and the cocatalyst gas exist in the premix zone, the gas to be tested and the cocatalyst gas are mixed to form mixed gas, and the mixed gas can drive the rotating assembly to rotate;
the premix zone is internally provided with a rotating assembly, when the mixed gas acts on the rotating assembly, the rotating assembly rotates along a first direction and generates a circumferential component and a longitudinal component, and the circumferential component and the longitudinal component guide the mixed gas to the guide zone;
the rotating assembly is connected with the plunger, the plunger is provided with a first preset time period and a second preset time period, when the rotating assembly rotates continuously along the first direction, the rotating assembly drives the plunger to slide continuously for the first preset time period in the direction of the flow guide area, and the gas channel on the plunger is communicated with the flow guide area; when the rotating assembly rotates continuously along the second direction, the rotating assembly drives the plunger to slide continuously in the direction away from the flow guide area for a second preset time period, and the gas channel is closed.
Further, the rotating assembly comprises a rotating rod which is rotatably connected to the bottom of the mixer, a first turning blade is fixedly mounted on the rotating rod, the first air guide hole and the second air guide hole are respectively opposite to the first turning blade, and when gas to be detected enters the premix zone through the first air guide hole, the gas to be detected impacts the first turning blade to drive the rotating rod to rotate along a first direction; when the cocatalyst gas enters the premix zone through the second gas guide hole, the cocatalyst gas impacts the first turning vane to drive the turning rod to turn along the first direction.
Furthermore, the gas inlet of the gas channel is positioned on the side wall of the plunger, the gas outlet of the gas channel is positioned at the top of the plunger and is communicated with the guide notch, and the inner diameter of the gas channel is gradually increased from the gas inlet to the gas outlet; the bottom of plunger and the top threaded connection of dwang, when the dwang rotated along first direction, the drive plunger continuously moved first preset time quantum to the dwang place direction, and gas passage communicates each other with the water conservancy diversion district.
Further, flow stabilizers are installed in the to-be-detected gas conveying equipment and the co-catalysis gas conveying equipment, the to-be-detected gas is guided to the first gas guiding area after being subjected to flow stabilization in the flow stabilizers, and the co-catalysis gas is guided to the second gas guiding area after being subjected to flow stabilization in the flow stabilizers.
Furthermore, a first valve plate for adjusting the flow of the gas to be detected is rotatably mounted in the gas conveying equipment to be detected, and a first adjusting knob for adjusting the first valve plate is externally arranged on the gas conveying equipment to be detected; and a second valve plate for adjusting the flow of the auxiliary catalysis gas is rotatably arranged in the auxiliary catalysis gas conveying equipment, and a second adjusting knob for adjusting the second valve plate is externally arranged on the auxiliary catalysis gas conveying equipment.
Further, install the adjusting part who is used for adjusting the gas that awaits measuring and assist the air flow between gaseous conveying equipment of awaiting measuring and the air conveying equipment of supporting, adjusting part includes that the mount is established at the mounting panel between gaseous conveying equipment of awaiting measuring and the air conveying equipment of supporting, rotate on the mounting panel and install first gear, second gear and third gear, first gear and first adjust knob coaxial coupling, second gear and second adjust knob coaxial coupling, third gear coaxial coupling has the pivot that slides and run through the mounting panel, the other end of pivot is connected with the third knob, and is connected with the elastic component between third knob and the mounting panel, the third knob can make third gear and first gear and second gear intermeshing through the pivot.
Furthermore, it carries out the gas washing pipe of washing gas to be connected with to be used for the water conservancy diversion district to assist the air conveying equipment, and the gas washing pipe embeds has the third valve plate that is used for adjusting the circulation of gas of assisting, and installs the blast pipe that is used for discharging the circulation of assisting outward of blender, and the gas outlet of blast pipe articulates there is the apron that is used for sealing the gas outlet, and the apron installs the torsional spring with the articulated department of blast pipe.
Furthermore, the other end of the gas washing pipe is communicated with the flow guide area, a second steering blade opposite to the gas outlet of the gas washing pipe is arranged on the rotating rod in the flow guide area, the auxiliary gasification gas impacts the second steering blade through the gas washing pipe to drive the rotating rod to rotate along the second direction, when the rotating rod rotates along the second direction, the plunger is driven to continuously move towards the catalytic combustion sensor for a second preset time period, and the gas channel is closed.
Compare gaseous detection device of this scheme with prior art's beneficial effect is:
1. when the gas to be detected and the co-catalysis gas can impact the first steering blade through the first gas guide hole and the second gas guide hole respectively, the first steering blade drives the rotating rod to rotate along the first direction, the rotating rod rotates along the first direction and generates a circumferential component and a longitudinal component, the circumferential component mixes the gas to be detected and the co-catalysis gas in the premix zone to form a mixed gas, the gas to be detected and the co-catalysis gas are preliminarily mixed in the premix zone, and the longitudinal component guides the mixed gas to the guide zone from the premix zone.
2. When the dwang rotated along first direction, the dwang drove the plunger and continuously moved first preset time quantum to direction at guide district place, and gas passage and guide district communicate each other, because gas passage's internal diameter is crescent to the gas outlet by the air inlet, can play the effect of stationary flow to the mist of direction catalytic combustion sensor, improve the detection precision of catalytic combustion sensor to the gas concentration that awaits measuring.
3. After the detection is finished, cutting off a conduction path between the gas conveying pipe to be detected and the first gas guide area, and cutting off a conduction path between the cocatalyst gas conveying pipe and the second gas guide area; and meanwhile, a conduction path between the gas washing pipe and the flow guide area is opened, the auxiliary catalytic gas impacts the second steering blades through the gas washing pipe, the second steering blades drive the rotating rod to continuously rotate along the second direction, the rotating rod drives the plunger to continuously move towards the direction of the catalytic combustion sensor for a second preset time period, the gas channel is closed, the auxiliary catalytic gas enters the flow guide area through the gas washing pipe and is discharged from the gas outlet of the exhaust pipe with the gas to be detected remaining in the flow guide area, and the mixer is cleaned.
A second object of the present invention is to provide a method for detecting a gas, comprising the steps of:
s1, conveying the gas to be detected and the cocatalyst gas into a mixer according to the flow ratio of 1:1-3 to mix to obtain a gas sample to be detected;
and S2, detecting the gas sample to be detected through the catalytic combustion sensor to obtain the concentration value of the combustible gas.
Further, the cocatalyst is air or oxygen, and the oxygen content in the gas sample to be detected is more than 5%.
Further, before the co-catalysis gas is mixed into the gas to be measured to obtain the gas sample to be measured, the pressure of the gas to be measured and the pressure of the co-catalysis gas are respectively regulated by a flow stabilizer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;
fig. 4 is a schematic sectional view in the direction C-C in fig. 1.
Reference numerals in the drawings of the specification include: the device comprises a mixer 1, a partition plate 11, an opening 12, a catalytic combustion sensor 13, a rotating rod 2, a first steering blade 21, a second steering blade 22, a spiral gas guide belt 23, a plunger 24, a gas channel 25, an annular plate 3, a side partition plate 30, a first gas guide hole 31, a second gas guide hole 32, a gas conveying pipe 4 to be tested, a first valve plate 41, a first adjusting knob 42, a first gear 43, a co-catalysis gas conveying pipe 5, a second valve plate 51, a second adjusting knob 52, a second gear 53, a mounting plate 6, a third gear 63, a rotating shaft 61, a third knob 62, an elastic piece 64, a premix zone 70, a first gas guide zone 71, a second gas guide zone 72, a gas washing pipe 8, a rotating knob 81, a third valve plate 82, a gas exhaust pipe 9 and a cover plate 91.
Detailed Description
The invention will be described in further detail by means of specific embodiments with reference to the accompanying drawings:
example (b):
the utility model provides a gaseous detection device, as shown in fig. 1 and 2, including the gaseous conveying equipment that awaits measuring, assist gaseous conveying equipment, blender 1 and catalytic combustion sensor 13, catalytic combustion sensor 13 is installed at the top of blender 1, the top of blender 1 is equipped with the direction notch that makes the mist lead catalytic combustion sensor 13, slidable mounting has the plunger 24 that is used for sealing the direction notch in the direction notch, be formed with a plurality of gas passage 25 in the plunger 24, the air inlet of gas passage 25 is located the lateral wall of plunger 24, the gas outlet of gas passage 25 is located plunger 24 top and communicates with the direction notch, and the internal diameter of gas passage 25 is crescent to the gas outlet by the air inlet.
As shown in fig. 1, a partition plate 11 is disposed in the mixer 1, the partition plate 11 divides the interior of the mixer 1 into a diversion area and a mixing area from top to bottom, and an opening 12 for communicating the diversion area and the mixing area is disposed on the partition plate 11; the mixing area is internally provided with a separation structure, the separation structure comprises an annular plate 3 and two side partition plates 3030, the annular plate 3 and the two side partition plates 3030 separate the mixing area into a premix zone 70, a first air guide area 71 and a second air guide area 72, the annular plate 3 is provided with a first air guide hole 31 and a second air guide hole 32, the premix zone 70 is positioned in a space formed by the annular plate 3 in a surrounding manner, the premix zone 70 is communicated with the air guide areas, the first air guide area 71 and the second air guide area 72 are symmetrically arranged at two sides of the premix zone 70, and the two side partition plates 3030 separate the first air guide area 71 and the second air guide area 72 from each other.
The to-be-tested gas conveying equipment comprises a to-be-tested gas conveying pipe 4 communicated with the flue, the other end of the to-be-tested gas conveying pipe 4 is communicated with a first gas guide area 71, the catalysis-assisting gas conveying equipment comprises a catalysis-assisting gas conveying pipe 5, one end of the catalysis-assisting gas conveying pipe 5 is communicated with a second gas guide area 72, and flow stabilizers are arranged in the to-be-tested gas conveying pipe 4 and the catalysis-assisting gas conveying pipe 5; the gas conveying pipe 4 to be tested can convey the gas to be tested into the premix zone 70 through the first gas guide holes 31, and the cocatalyst gas conveying pipe 5 can convey cocatalyst gas into the premix zone 70 through the second gas guide holes 32.
As shown in fig. 1, a material guiding assembly is arranged in a mixer 1, the material guiding assembly comprises a rotating rod 2 rotatably connected to the bottom of the mixer 1, the rotating rod 2 passes through an opening 12 on a partition plate 11, a spiral material guiding belt 23 is installed on a portion of the rotating rod 2 located in a flow guiding area, a plurality of first turning vanes 21 are fixedly installed on a portion of the rotating rod 2 located in a premix area 70, the first turning vanes 21 are opposite to a first gas guiding hole 31 and a second gas guiding hole 32 respectively, a gas to be tested and a co-catalysis gas can impact on the first turning vanes 21 through the first gas guiding hole 31 and the second gas guiding hole 32 respectively, the first turning vanes 21 drive the rotating rod 2 to rotate forward, the top of the rotating rod 2 is in threaded connection with a plunger 24 at the top of the mixer 1, the rotating rod 2 rotates forward to drive the plunger 24 to move and enable an air inlet of an air channel 25 to communicate with the flow guiding area, and the rotating rod 2 rotates forward to form a mixed gas vortex in the flow guiding area in the premix area 70, and guiding the mixed gas to the catalytic combustion sensor 13 through the flow guide area and a gas channel 25 on the plunger 24, and detecting the concentration of the gas to be detected by using the catalytic combustion sensor 13.
As shown in fig. 1 and 3, a first valve plate 41 for adjusting the flow rate of the gas to be measured is rotatably mounted in the gas delivery pipe 4 to be measured, and a first adjusting knob 42 for adjusting the first valve plate 41 is externally mounted on the gas delivery pipe 4 to be measured; a second valve plate 51 for adjusting the flow rate of the promoting gas is rotatably mounted in the promoting gas conveying pipe 5, and a second adjusting knob 52 for adjusting the second valve plate 51 is externally arranged on the promoting gas conveying pipe 5. Install the adjusting part who is used for adjusting the gas that awaits measuring and assist the gas flow between gas conveyer pipe 4 and the gas conveyer pipe 5 of supporting, the adjusting part includes that the mount establishes the mounting panel 6 between gas conveyer pipe 4 and the gas conveyer pipe 5 of supporting that awaits measuring, it installs first gear 43 to rotate on the mounting panel 6, second gear 53 and third gear 63, first gear 43 and first adjust knob 42 coaxial coupling, second gear 53 and second adjust knob 52 coaxial coupling, third gear 63 coaxial coupling has the pivot 61 that slides and runs through mounting panel 6, the other end of pivot 61 is connected with third knob 62, and be connected with elastic component 64 between third knob 62 and the mounting panel 6, third knob 62 can make third gear 63 and first gear 43 and second gear 53 intermeshing through pivot 61.
As shown in fig. 1, the auxiliary catalytic gas delivery pipe 5 is connected with a gas washing pipe 8 for washing gas in the flow guiding area, the other end of the gas washing pipe 8 is communicated with the flow guiding area, a second turning blade 22 opposite to the gas outlet of the gas washing pipe 8 is arranged on the rotating rod 2 in the flow guiding area, the auxiliary catalytic gas can impact the second turning blade 22 through the gas washing pipe 8 to drive the rotating rod 2 to rotate reversely, and the rotating rod 2 can drive the plunger 24 to move and cut off the communication path between the gas inlet of the gas channel 25 and the flow guiding area. A third valve plate 82 for adjusting the flow of the auxiliary aeration gas is arranged in the air washing pipe 8, and a rotating knob 81 for adjusting the opening and closing degree of the third valve plate 82 is arranged outside the air washing pipe 8; an exhaust pipe 9 for discharging co-catalysis gas is installed outside the mixer 1, a cover plate 91 for sealing the gas outlet is hinged to the gas outlet of the exhaust pipe 9, and a torsion spring is installed at the hinged position of the cover plate 91 and the exhaust pipe 9. The auxiliary catalytic gas enters the flow guide area through the gas washing pipe 8, and the residual gas to be tested in the flow guide area is discharged from the gas outlet of the gas exhaust pipe 9, so that the mixer 1 is cleaned.
A method of detecting a gas, comprising the steps of:
s1, conveying the gas to be detected and the cocatalyst gas into the mixer 1 according to the flow ratio of 1:1-3 to mix to obtain a gas sample to be detected;
and S2, detecting the gas sample to be detected through the catalytic combustion sensor 13 to obtain the concentration value of the combustible gas.
Further, the cocatalyst is air or oxygen, and the oxygen content in the gas sample to be detected is more than 5%.
Further, before the co-catalysis gas is mixed into the gas to be measured to obtain the gas sample to be measured, the pressure of the gas to be measured and the pressure of the co-catalysis gas are respectively regulated by a flow stabilizer.
The specific implementation mode of the scheme is as follows:
when the device is used, one end of the gas conveying pipe 4 to be detected is connected with a flue in which gas to be detected is arranged, and the other end of the gas conveying pipe is communicated with the first gas guide area 71; one end of the catalysis promotion gas conveying pipe 5 is communicated with the second gas guide area 72, and the other end is connected with an air pump. Before detection, the conducting path between the washing air pipe 8 and the flow guiding area is closed, the opening and closing degree of the first valve plate 41 and the second valve plate 51 can be respectively realized by rotating the first adjusting knob 42 and the second adjusting knob 52, thereby adjusting the flow ratio of the gas to be measured and the co-catalysis gas, determining the flow ratio of the gas to be measured and the co-catalysis gas, the elastic member 64 can be pressed by the third knob 62, so that the third knob 62 drives the third gear 63 to move through the rotating shaft 61 until the third gear 63 is meshed with the first gear 43 and the second gear 53 (as shown in fig. 4), the third gear 63 is driven to rotate by rotating the third knob 62, so that the third gear 63 simultaneously drives the first gear 43 and the second gear 53 to rotate, therefore, the flow rates of the gas to be detected and the co-catalysis gas are synchronously adjusted, and the flow rate ratio of the gas to be detected and the co-catalysis gas is always kept consistent.
During detection, the gas conveying pipe 4 to be detected can convey gas to be detected into the premix zone 70 through the first gas guide holes 31, and the cocatalyst gas conveying pipe 5 can convey cocatalyst gas into the premix zone 70 through the second gas guide holes 32; when the gas to be detected and the co-catalysis gas can respectively impact the first turning vane 21 through the first gas guide hole 31 and the second gas guide hole 32, the first turning vane 21 drives the turning rod 2 to rotate in the forward direction, the turning rod 2 rotates in the forward direction to drive the plunger 24 to continuously move towards the direction of the flow guide area for a first preset time period, and the gas channel 25 is communicated with the flow guide area; the rotating rod 2 rotates forwards to generate a circumferential component and a longitudinal component in the premix zone 70 through the first steering blade 21, the circumferential component mixes the gas to be detected and the co-catalysis gas in the premix zone to form mixed gas, so that the gas to be detected and the co-catalysis gas are preliminarily mixed in the premix zone, the longitudinal component guides the mixed gas to the flow guide zone from the premix zone, the mixed gas is guided to the catalytic combustion sensor 13 through the gas channel 25 under the driving of the spiral material guide belt 23, and the concentration of the gas to be detected is detected by the catalytic combustion sensor 13.
After the detection is finished, the opening and closing degrees of the first valve plate 41 and the second valve plate 51 can be respectively cut off by rotating the first adjusting knob 42 and the second adjusting knob 52, so that the path between the gas conveying pipe 4 to be detected and the first gas guide area 71 is cut off, and the path between the auxiliary gas conveying pipe 5 and the second gas guide area 72 is cut off; meanwhile, the opening and closing degree of the third valve plate 82 in the purge pipe 8 is adjusted, so that the purge pipe 8 is communicated with the path of the flow guide area, the auxiliary gasification gas impacts the second turning blade 22 to drive the rotating rod 2 to rotate reversely under the action of the air pump, the rotating rod 2 rotates reversely to drive the plunger 24 to move upwards continuously for a second preset time period, and the gas channel is closed; the auxiliary catalytic gas enters the flow guide area through the gas washing pipe 8, when the pressure of the auxiliary catalytic gas in the flow guide area is large enough, the cover plate 91 of the gas outlet of the exhaust pipe 9 is pushed open, the auxiliary catalytic gas is discharged from the gas outlet of the exhaust pipe 9 along with the gas to be tested in the flow guide area, and the mixer 1 is cleaned.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. A gas detection device, characterized in that: the device comprises a mixer (1), gas conveying equipment to be detected, auxiliary catalysis gas conveying equipment and a catalytic combustion sensor (13) for detecting gas, wherein the catalytic combustion sensor (13) is arranged at the top of the mixer (1), a guide notch is formed in the top of the mixer (1), a plunger (24) is arranged in the guide notch in a sliding mode, and a gas channel (25) is formed in the plunger (24); a partition plate (11) is arranged in the mixer (1), the interior of the mixer (1) is divided into a flow guide area and a mixing area by the partition plate (11), a partition structure is arranged in the mixing area, the mixing area is divided into a premix area (70), a first air guide area (71) and a second air guide area (72) by the partition structure, the premix area (70) is communicated with the flow guide area, and the first air guide area (71) and the second air guide area (72) are symmetrically arranged on two sides of the partition structure;
the separation structure comprises an annular plate (3) and a side partition plate (30), a space formed by enclosing the annular plate (3) is a premix zone (70), and the side partition plate (30) separates a first air guide zone (71) and a second air guide zone (72) from each other; the annular plate (3) is provided with a first air guide hole (31) and a second air guide hole (32), the first air guide area (71) is communicated with the premix zone (70) through the first air guide hole (31), and the second air guide area (72) is communicated with the premix zone (70) through the second air guide hole (32);
the to-be-detected gas conveying equipment is connected with the first gas guide area (71) and can convey the to-be-detected gas to the first gas guide area (71), the cocatalyst gas conveying equipment is connected with the second gas guide area (72) and can convey cocatalyst gas to the second gas guide area (72), the to-be-detected gas and the cocatalyst gas are mixed to form mixed gas when the to-be-detected gas and the cocatalyst gas exist in the premix zone (70), and the mixed gas can drive the rotating assembly to rotate;
the premix zone (70) is internally provided with a rotating assembly, when the mixed gas acts on the rotating assembly, the rotating assembly rotates along a first direction and generates a circumferential component and a longitudinal component, and the circumferential component and the longitudinal component guide the mixed gas to the guide zone;
the rotating assembly is connected with the plunger (24), the plunger (24) is configured with a first preset time period and a second preset time period, when the rotating assembly rotates continuously along the first direction, the rotating assembly drives the plunger (24) to slide continuously for the first preset time period in the direction of the flow guide area, and a gas channel (25) on the plunger (24) is communicated with the flow guide area; when the rotating assembly continuously rotates along the second direction, the rotating assembly drives the plunger (24) to continuously slide towards the direction far away from the flow guide area for a second preset time period, and the gas channel (25) is closed; rotating assembly connects dwang (2) in blender (1) bottom including rotating, it has and is used for carrying out the gas washing to the water conservancy diversion district to assist the air conveying equipment to be connected with and washes trachea (8) of gas, the other end and the water conservancy diversion district intercommunication of gas washing pipe (8), and be located dwang (2) in the water conservancy diversion district on be equipped with the gas outlet relative second of gas washing pipe (8) and turn to blade (22), assist the air and strike the second through gas washing pipe (8) and turn to blade (22) and rotate along the second direction with drive dwang (2), when dwang (2) rotate along the second direction, drive plunger (24) are to the second preset time quantum that continuously moves in catalytic combustion sensor (13), and gas passage (25) are closed.
2. A gas detection device according to claim 1, wherein: the device is characterized in that a first turning blade (21) is fixedly installed on the turning rod (2), the first air guide hole (31) and the second air guide hole (32) are respectively opposite to the first turning blade (21), and when gas to be detected enters the premix zone through the first air guide hole (31), the gas to be detected impacts the first turning blade (21) to drive the turning rod (2) to rotate along a first direction; when the auxiliary gas enters the premix zone through the second gas guide holes (32), the auxiliary gas impacts the first turning vane (21) to drive the rotating rod (2) to rotate along the first direction.
3. A gas detection device according to claim 2, wherein: the gas inlet of the gas channel (25) is positioned on the side wall of the plunger (24), the gas outlet of the gas channel (25) is positioned at the top of the plunger (24) and communicated with the guide notch, and the inner diameter of the gas channel (25) is gradually increased from the gas inlet to the gas outlet; the bottom of plunger (24) and the top threaded connection of dwang (2), when dwang (2) rotated along first direction, drive plunger (24) continuously moved first preset time quantum to dwang (2) place direction, and gas passage (25) and water conservancy diversion district communicate with each other.
4. A gas detection device according to claim 1, wherein: and flow stabilizers are respectively arranged in the gas conveying equipment to be detected and the cocatalyst gas conveying equipment, the gas to be detected is guided to the first gas guide area (71) after being subjected to flow stabilization in the flow stabilizers, and the cocatalyst gas is guided to the second gas guide area (72) after being subjected to flow stabilization in the flow stabilizers.
5. A gas detection apparatus according to claim 4, wherein: a first valve plate (41) used for adjusting the flow of gas to be detected is rotatably mounted in the gas conveying equipment to be detected, and a first adjusting knob (42) used for adjusting the first valve plate (41) is externally arranged on the gas conveying equipment to be detected; and a second valve plate (51) for adjusting the flow rate of the auxiliary catalysis gas is rotatably mounted in the auxiliary catalysis gas conveying equipment, and a second adjusting knob (52) for adjusting the second valve plate (51) is externally arranged on the auxiliary catalysis gas conveying equipment.
6. A gas detection apparatus according to claim 5, wherein: install the adjusting part who is used for adjusting the gas that awaits measuring and assist the air flow between gaseous conveying equipment and the gas conveying equipment of holding altogether, adjusting part establishes mounting panel (6) between gaseous conveying equipment that awaits measuring and the gas conveying equipment of holding altogether including the mount, rotate on mounting panel (6) and install first gear (43), second gear (53) and third gear (63), first gear (43) and first adjust knob (42) coaxial coupling, second gear (53) and second adjust knob (52) coaxial coupling, third gear (63) coaxial coupling has pivot (61) that the slip runs through mounting panel (6), the other end of pivot (61) is connected with third knob (62), and is connected with elastic component (64) between third knob (62) and mounting panel (6), third knob (62) can make third gear (63) and first gear (43) and second gear (63) through pivot (61) The wheels (53) are mutually engaged.
7. A gas detection apparatus according to claim 4, wherein: the washing pipe (8) is internally provided with a third valve plate (82) for adjusting the flow of the co-catalysis gas, the mixer (1) is externally provided with an exhaust pipe (9) for discharging the co-catalysis gas, the gas outlet of the exhaust pipe (9) is hinged with a cover plate (91) for sealing the gas outlet, and the hinged part of the cover plate (91) and the exhaust pipe (9) is provided with a torsion spring.
8. A method of detecting a gas detection apparatus according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, conveying the gas to be detected and the cocatalyst gas into a mixer (1) according to the flow ratio of 1:1-3 to mix to obtain a gas sample to be detected;
and S2, detecting the gas sample to be detected through the catalytic combustion sensor (13) to obtain the concentration value of the combustible gas.
9. The detection method according to claim 8, characterized in that: the cocatalyst is air or oxygen, and the oxygen content in the gas sample to be detected is more than 5%.
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