CN116973181B - Marine methane gas concentration monitoring system - Google Patents
Marine methane gas concentration monitoring system Download PDFInfo
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- CN116973181B CN116973181B CN202311237717.3A CN202311237717A CN116973181B CN 116973181 B CN116973181 B CN 116973181B CN 202311237717 A CN202311237717 A CN 202311237717A CN 116973181 B CN116973181 B CN 116973181B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 132
- 238000005070 sampling Methods 0.000 claims abstract description 131
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 206010063659 Aversion Diseases 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
- G01N2001/4033—Concentrating samples by thermal techniques; Phase changes sample concentrated on a cold spot, e.g. condensation or distillation
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the field of gas monitoring, and discloses an offshore methane gas concentration monitoring system which comprises a mounting housing, wherein a rack is arranged in the mounting housing, a sampling mechanism and a detection mechanism are arranged on the rack, the sampling mechanism is used for sampling an air sample, the offshore methane is monitored for one time at intervals of preset time, the air sample in a sampling tube and the air in a sampling environment are kept consistent through natural air flowing in the preset time, when the detection is completed, the sampling mechanism seals the sampling tube in a thin sealing plate cutting mode, the sampled air sample and the air in the sampling environment are kept consistent, the sampling result is more accurate, the detection mechanism is used for extracting the air sample and sequentially carrying out water removal and methane detection on the air sample, the water removal can prevent the detection from being influenced by moisture, the detection result is more accurate, the detection assembly is isolated when the detection is not completed, and the service life of the detection assembly is prolonged.
Description
Technical Field
The invention relates to the field of gas monitoring, in particular to the field of methane gas concentration monitoring, and particularly relates to an offshore methane gas concentration monitoring system.
Background
In the prior art, a methane detection method includes a thermocatalytic combustion method, a thermal conduction element method, an infrared measurement method and the like, wherein the infrared measurement method is gradually and widely applied due to wide detection range, high efficiency and long service life, but the infrared measurement method also has some defects, such as: 1. because the detection is carried out on the sea, and the sea environment is relatively humid, on one hand, the sea humid environment is easy to cause corrosion damage to the infrared measurement structure and influence the service life of the infrared measurement structure, and on the other hand, the humidity means that the moisture content in the air is relatively high and can influence the accuracy of the infrared measurement result; 2. the infrared measurement method comprises two major parts of optical measurement and signal detection processing, wherein the optical measurement refers to that infrared light is emitted towards a sample analysis chamber by utilizing an infrared light emitting device and then received by an infrared light receiving device, namely, a measurement result is aimed at a gas sample in the sample analysis chamber, so that the accuracy of the collected sample needs to be ensured when the sample is sampled, if errors exist in the collection of the sample, the final measurement result can be influenced, in the prior art, the collection of the gas sample generally adopts a fan and other technical means to extract air in the environment into a sample sampling tube, and the collection method has some defects: as is well known, methane is lighter than air, the air relative molecular weight is 29, the methane relative molecular weight is 16, the weight ratio of methane to air is 0.54, and methane is about half lighter than air, so that in the process of sampling air by using a fan or other technical means, methane is easy to be extracted in advance than air, the concentration of methane in a finally collected sample is higher than that in a collection environment, the final measurement result is higher, and the accuracy of the measurement result is affected.
Based on the above, the invention provides an offshore methane gas concentration monitoring system.
Disclosure of Invention
To solve the problems mentioned in the background above, the present invention provides an offshore methane gas concentration monitoring system.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.
The utility model provides an offshore methane gas concentration monitoring system, its includes the installation housing, and the through-hole that is used for the air business turn over is seted up to the surface of installation housing, is provided with the frame in the installation housing, installs sampling mechanism and detection mechanism in the frame, and sampling mechanism is used for carrying out the air sample sampling and the air sample that the sampling obtained keeps unanimous with the air in the sampling environment, and detection mechanism is used for extracting the air sample and carries out dewatering, methane detection to the air sample in proper order.
Further, sampling mechanism includes the horizontal installation in the frame and both ends open-ended sampling pipe, be the shutoff body that goes up and down to arrange and be located the sampling pipe top initially and be used for driving the shutoff body and take place the straight line module one of removal along vertical direction, the shutoff body includes the connecting plate, the equal vertical extension in both ends of connecting plate has thin shrouding downwards, two sets of thin shrouding opposite sides overlap with the both ends terminal surface of sampling pipe respectively, the side chamfer that two sets of thin shrouding bottom are on the back of the body.
Further, the sampling mechanism also comprises a traction frame positioned below the sampling tube, a guide rod which is vertically arranged is arranged on the frame, the traction frame and the guide rod form sliding connection, a tripping frame is arranged at the upper end of the guide rod, a first spring is sleeved outside the guide rod, and the first spring is provided with two groups and is respectively positioned at the upper side and the lower side of the joint of the guide rod and the traction frame;
the traction frame consists of a middle support and a first side plate and a second side plate which are arranged at two ends of the middle support, wherein the opposite side surfaces of the first side plate and the second side plate are respectively overlapped with the end surfaces of the two ends of the sampling tube, the opposite side surfaces of the first side plate and the second side plate are provided with a clamping assembly, the clamping assembly is used for realizing detachable connection between the traction frame and the plugging body, and when the connection is completed, the end surface of Bao Fengban facing the sampling tube is contacted with the end surface of the first side plate or the second side plate facing the sampling tube;
the first side plate is provided with a pipe hole, the pipe hole is communicated with the detection mechanism through a connecting pipeline, the second side plate is provided with a piston groove towards the side face of the sampling pipe, a piston is sleeved in the piston groove, the traction frame is provided with a first driving piece for driving the piston to move, and the side face of the second side plate, which is away from the sampling pipe, is provided with an air hole communicated with the piston groove.
Further, side rods which are vertically arranged are arranged on the opposite side surfaces of the two groups of thin sealing plates, the side rods are provided with two groups of side rods, the distance between the two groups of side rods is perpendicular to the axial line of the sampling tube, and insertion holes are formed in the opposite side surfaces of the two groups of side rods;
the side that curb plate one and curb plate two are on the back of the body is provided with the mounting groove, the buckle subassembly is including sliding two sets of draw-in bars that set up in the mounting groove, the slip direction of draw-in bar is the axial lead of horizontal arrangement and perpendicular to sampling pipe, be provided with spring two between two sets of draw-in bars, the mounting groove is stretched out to one side that two sets of draw-in bars are on the back of the body, the bottom of side lever is provided with inclined plane one, distance between the inclined plane one on two sets of side levers on the same thin shrouding of group is by decreasingly down to thin shrouding moves down the in-process, the inclined plane one and draw-in bar stretch out the tip contact of mounting groove.
Further, the buckle assembly further comprises a pushing support arranged at the upper end of the first side plate or the second side plate in the vertical direction and a third spring with elasticity for driving the pushing support to move upwards, the bottom of the pushing support is provided with a second inclined plane, the second inclined plane stretches into the mounting groove, the upper end of the clamping rod is provided with a third inclined plane, the distance between the third inclined planes on the two groups of clamping rods is decreased from bottom to top, the second inclined plane is attached to the third inclined plane, and the second inclined plane is correspondingly provided with two groups.
Further, the detection mechanism comprises a cylindrical outer casing with an opening at the upper end and a closed lower end, the opening end of the outer casing is provided with a casing cover in a matching way, a rotary body is coaxially sleeved in the outer casing, and the rotary body is driven to rotate by a motor arranged at the closed end of the outer casing;
the terminal surface of rotator has run through and has been seted up the mounting hole, the mounting hole is provided with four sets of along the circumferencial direction array of rotator, install the detection room in the mounting hole, under the initial state, four sets of detection room place position names in proper order are receiving position, dewatering position, detect position and evacuation position, the detection room of receiving position department is used for receiving the air sample, dewatering position department is provided with the dewatering subassembly that is used for carrying out dewatering to the air sample, detect position department is provided with the detection subassembly that is used for carrying out methane detection to the air sample, evacuation position department is provided with the evacuation subassembly that is used for air sample and water exhaust.
Further, the detection chamber is in a cylindrical shape with an opening at the upper end and a closed lower end, a valve hole is formed in the closed end of the detection chamber, a lower orifice of the valve hole extends to form a fixed sleeve, a lower hollow plate is arranged at the lower opening of the fixed sleeve, a core rod is sleeved in the valve hole, a plugging core is arranged at the upper end of the core rod, the lower end of the core rod extends out of the lower hollow plate, an upper hollow plate is arranged outside the core rod, the lower hollow plate supports the upper hollow plate, a spring IV is sleeved outside the core rod and positioned between the closed end of the detection chamber and the upper hollow plate, and in an initial state, the plugging core plugs the valve hole;
the cavity bottom of the outer sleeve shell is coaxially provided with a ring groove, and the fixed sleeve is positioned in the ring groove;
and the shell cover is provided with a receiving hole, when the detecting chamber is rotationally shifted to a receiving position, the receiving hole is communicated with the detecting chamber, and the receiving hole is communicated with the connecting pipeline.
Further, a rotary hole is formed in the shell cover, when the detection chamber is rotationally shifted to a water removal position, the rotary hole is coaxial with the detection chamber, a connecting hole is formed in the closed end of the outer shell, and the connecting hole is coaxial with the rotary hole;
the dewatering assembly comprises a heat conduction block arranged in the connecting hole, an avoidance opening for avoiding the fixed sleeve is formed in the heat conduction block, the upper end of the heat conduction block is flush with the closed end of the detection chamber, and a refrigerating element is arranged at the bottom of the heat conduction block.
Further, the detection assembly comprises an upper sleeve vertically arranged on the shell cover, and the upper sleeve is coaxial with the detection chamber when the detection chamber is rotationally displaced to a detection position;
the upper sleeve is internally provided with a mounting body in a sliding sleeve manner, the bottom of the mounting body vertically extends downwards to form mounting rods, two groups of mounting rods are arranged, one opposite sides of the two groups of mounting rods are provided with embedded holes, one group of embedded holes are internally provided with infrared light emitting elements, the other group of embedded holes are internally provided with infrared light receiving elements, the shell cover is provided with an avoidance hole for avoiding the mounting rods, the lower end face of the mounting rods coincides with the lower orifice of the avoidance hole in an initial state, and the upper sleeve is provided with a second driving piece for driving the mounting body to move.
Further, the tank bottom of annular is provided with the spread groove, the tank bottom of spread groove is provided with suction hole and lug, the upper end of lug is provided with inclined plane IV, evacuation subassembly is including setting up the vacuum pump at the overcoat shell blind end, the input and the suction hole intercommunication of vacuum pump, the output is provided with row material pipe, when detecting the room rotatory aversion to evacuation position, detect the room and be located the spread groove directly over, at the in-process that detects the room and remove towards the evacuation position, inclined plane IV can take place to contact and jack up the core bar with the bottom of core bar.
Compared with the prior art, the invention has the beneficial effects that:
1. reference is made to the description of the sampling mechanism in the detailed description:
1. the marine methane monitoring is carried out for one time at intervals of preset time, and in the preset time, air samples in the sampling tube can be kept consistent with air in the sampling environment through natural air flow;
2. the sampling mechanism is used for plugging the two ends of the sampling tube through the thin sealing plate, so that after the sampling tube is plugged by the thin sealing plate, the thin sealing plate is connected with the first side plate or the second side plate or moves upwards, so that the first side plate and the second side plate plug the sampling tube, and the sampling tube is plugged, so that the processes cannot influence an air sample in the sampling tube;
further: a. the thin sealing plate is thinner and the bottom is provided with a cutting edge; b. the thin shrouding has the interval distance with the sampling pipe in the initial, and this interval distance can be regarded as acceleration stage, and thin shrouding still need to continue to move down after shutoff sampling pipe and be connected with curb plate one or curb plate two, and the continuous move down can be regarded as deceleration stage, namely: the Bao Fengban sampling tube is provided with an acceleration stage before blocking and a deceleration stage after blocking, so the Bao Fengban sampling tube blocking process can keep constant speed; the comprehensive a and b show that in the process of plugging the sampling tube by the thin sealing plate, the air fluctuation at the tube orifice of the sampling tube is very weak and almost none, so that the air sample in the sampling tube can be regarded as not fluctuating, the air sample in the sampling tube is consistent with the air in the sampling environment, the sampling is more accurate, and the accuracy of the subsequent detection result is further improved;
3. the air sample in the sampling tube is sent into the detection mechanism in a pushing manner by the piston, on one hand, the sampling tube is prevented from being influenced by negative pressure generated after the air sample leaves, on the other hand, the air sample is prevented from contacting the outside in the process of sending the air sample into the detection mechanism, on the basis, the thin sealing plate is connected with the first side plate or the second side plate, and the air sample detection mechanism has the significance that if the first side plate and the second side plate are directly driven to move to seal the sampling tube, because the first side plate and the second side plate are respectively provided with a part, the weight is large, the cross section area is large, air fluctuation is easy to be caused during movement, unlike the thin sealing plate, the air sample detection mechanism is thinner and lighter, and the air fluctuation is difficult to be caused.
2. Reference is made to the description of the detection mechanism in the detailed description:
1. before methane detection is carried out on the air sample, the air sample is subjected to condensation water removal through the water removal component, so that the accuracy of the methane detection result of the air sample can be further improved;
2. the detection procedure is arranged after the water removal procedure and the receiving procedure, so that when the device is not used, the contact between the detection assembly and the external offshore environment can be isolated, and the service life of the detection assembly can be greatly prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an internal schematic diagram of the present invention;
FIG. 3 is a schematic diagram of a sampling mechanism;
FIG. 4 is a schematic illustration of a occluding body and a sampling tube;
FIG. 5 is a partial schematic view of a sampling mechanism;
FIG. 6 is a schematic view of a snap assembly;
FIG. 7 is a schematic view of a second side plate and a first driving member;
FIG. 8 is a schematic diagram of a first detection mechanism;
FIG. 9 is a second schematic diagram of the detection mechanism;
FIG. 10 is a schematic view of an exterior sleeve;
FIG. 11 is a partial schematic view of a detection mechanism;
FIG. 12 is a cross-sectional view of the detection chamber;
FIG. 13 is a schematic view of a water removal assembly;
FIG. 14 is a partial schematic view of a water removal assembly;
FIG. 15 is a schematic diagram of a detection assembly.
The reference numerals in the drawings are:
100. installing a housing;
200. a sampling mechanism; 201. a sampling tube; 202. a blocking body; 2021. a connecting plate; 2022. bao Fengban; 2023. a side bar; 2024. a jack; 203. a first linear module; 204. a traction frame; 2041. a middle bracket; 2042. a first side plate; 2043. a second side plate; 2044. air holes; 205. a guide rod; 206. a trip frame; 207. a first spring; 208. a clamping rod; 209. a second spring; 210. pushing the support; 211. a third spring; 212. a piston; 213. a first driving member; 214. a connecting pipe;
300. a detection mechanism; 301. an outer shell; 3011. a ring groove; 3012. a connection hole; 3013. a connecting groove; 3014. a suction hole; 3015. a bump; 302. a cover; 303. a rotating body; 304. a first motor; 305. a detection chamber; 3051. a core bar; 3052. plugging the core; 3053. an upper hollowed-out plate; 3054. a lower hollowed-out plate; 3055. a spring IV; 306. a water removal assembly; 3061. a heat conduction block; 3062. a refrigerating element; 3063. an upper bracket; 3064. a second linear module; 3065. a second motor; 3066. a rotation shaft; 3067. a rotating disc; 3068. a blade; 307. a detection assembly; 3071. an upper sleeve; 3072. a mounting body; 3073. a second driving piece; 3074. a mounting rod; 308. a vacuum pump; 309. and a discharge pipe.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 to 15, an offshore methane gas concentration monitoring system includes a mounting housing 100, a through hole for air to enter and exit is formed in an outer surface of the mounting housing 100, a rack is disposed in the mounting housing 100, and a sampling mechanism 200 and a detection mechanism 300 are mounted on the rack, wherein:
the sampling mechanism 200 is used for sampling an air sample, specifically, marine methane monitoring is performed at intervals for a preset time, in the preset time, air in the sampling tube 201 and air in a sampling environment are kept consistent through natural air flowing, when the detection is performed, the sampling mechanism 200 cuts and plugs two ends of the sampling tube 201, and as the plugging is performed in a thin sealing plate 2022 cutting mode, the air in the sampling tube 201 is approximately free from fluctuation in the plugging process, the sampled air sample can be regarded as consistent with the air in the sampling environment, and the sampling result is more accurate.
The detection mechanism 300 is used for extracting an air sample and sequentially carrying out water removal and methane detection on the air sample, on one hand, moisture in the air sample is removed, so that detection is not affected by the moisture, and the detection result is more accurate, and on the other hand, when the detection is not carried out, due to the existence of a water removal procedure, the structure in the methane detection procedure can be isolated, the structure is protected from being corroded by the sea surface humid environment, and the service life of the structure is prolonged.
As shown in fig. 3-7, sampling mechanism 200:
as shown in fig. 3, the sampling mechanism 200 includes a sampling tube 201 horizontally mounted on a frame and having two ends opened, a blocking body 202 arranged in a lifting manner and initially located above the sampling tube 201, and a first linear module 203 for driving the blocking body 202 to move in a vertical direction.
As shown in fig. 4, the plugging body 202 includes a connecting plate 2021 connected to the first linear module 203, two ends of the connecting plate 2021 vertically extend downwards to form thin sealing plates 2022, opposite sides of the two groups of thin sealing plates 2022 respectively overlap with two end faces of the sampling tube 201, preferably, opposite sides of bottom ends of the two groups of thin sealing plates 2022 are beveled, so that a blade shape is formed at the bottom of the two groups of thin sealing plates 2022, and when the sampling tube 201 is plugged by moving downwards, the plugging is smoother and smoother, and air fluctuation cannot be caused.
As shown in fig. 4, side bars 2023 are vertically arranged on opposite sides of the two groups of thin sealing plates 2022, the side bars 2023 are provided with two groups of side bars 2023, the distance between the two groups of side bars 2023 is perpendicular to the axial line of the sampling tube 201, and insertion holes 2024 are formed in opposite sides of the two groups of side bars 2023 in a penetrating manner along the thickness direction.
As shown in fig. 5 to 7, the sampling mechanism 200 further includes a traction frame 204 located below the sampling tube 201, where the traction frame 204 can move along a vertical direction, specifically, a guide rod 205 arranged vertically is installed on the frame, the traction frame 204 and the guide rod 205 form a sliding connection, a trip frame 206 is disposed at an upper end of the guide rod 205, a first spring 207 is sleeved outside the guide rod 205, and the first spring 207 is provided with two groups and is located on an upper side and a lower side of a joint between the guide rod 205 and the traction frame 204.
The traction frame 204 is composed of a middle support 2041, a first side plate 2042 and a second side plate 2043, wherein the first side plate 2042 and the second side plate 2043 are arranged at two ends of the middle support 2041, opposite side surfaces of the first side plate 2042 and the second side plate 2043 are respectively overlapped with two end surfaces of the sampling tube 201, opposite side surfaces are respectively provided with a group of buckle assemblies, the buckle assemblies are used for forming detachable connection with the jack 2024, and the detachable connection can be triggered and released by the tripping frame 206.
Specifically, as shown in fig. 6, the side surface of the first side plate 2042 opposite to the second side plate 2043 is provided with a mounting groove, the fastening assembly includes two groups of fastening rods 208 slidably disposed in the mounting groove, the sliding direction of the fastening rods 208 is horizontally arranged and perpendicular to the axis line of the sampling tube 201, two springs 209 are disposed between the two groups of fastening rods 208, one side of the two groups of fastening rods 208 opposite to each other extends out of the mounting groove, as shown in fig. 4, the bottom of the side rod 2023 is provided with a first inclined surface, the distance between the first inclined surfaces of the two groups of side rods 2023 on the same group of thin sealing plates 2022 decreases from bottom to top, and in the process of moving the thin sealing plates 2022 down, the inclined surfaces are contacted with the end parts of the fastening rods 208 extending out of the mounting groove, under the cooperation of the first inclined surfaces and the springs 209, the end parts of the fastening rods 208 extend into the insertion holes 2024, and when the connection of the thin sealing plates 2022 and the first side plate 2042 or the second side plate 2043 is completed, the end surface of the Bao Fengban faces the sampling tube 2042 and the end surface of the side plate 2042 or the second end surface of the side plate 2043 faces the sampling tube 201 contact each other, and form a complete plane.
The buckle assembly further comprises a pushing support 210 and a third spring 211, wherein the pushing support 210 is arranged at the upper end of the first side plate 2042 or the second side plate 2043 in the vertical direction, the third spring 211 is used for driving the pushing support 210 to move upwards, the bottom of the pushing support 210 is provided with a second inclined plane, the second inclined plane stretches into the mounting groove, the upper end of the clamping rod 208 is provided with a third inclined plane, the distance between the third inclined planes on the two groups of clamping rods 208 is decreased from bottom to top, the second inclined plane is attached to the third inclined plane, and the second inclined plane is correspondingly provided with two groups; when the traction frame 204 moves up, after the push support 210 contacts with the trip frame 206, the push support 210 moves relatively with the continuous upward movement of the traction frame 204, the two sets of clamping rods 208 approach each other through the cooperation of the second inclined plane and the third inclined plane, and leave from the jack 2024, the connection between the thin sealing plate 2022 and the side plate 2042 or 2043 is released, the traction frame 204 moves down and returns under the action of gravity, and the first spring 207 plays a role of buffering.
As shown in fig. 5-7, a pipe hole is formed in the first side plate 2042, and the pipe hole is communicated with the detection mechanism 300 through a connecting pipeline 214.
The side surface of the second side plate 2043 facing the sampling tube 201 is provided with a piston groove, a piston 212 is sleeved in the piston groove, the traction frame 204 is provided with a first driving part 213 for driving the piston 212 to move, and the side surface of the second side plate 2043 facing away from the sampling tube 201 is provided with an air hole 2044 communicated with the piston groove.
The working process of the sampling mechanism 200 is specifically:
firstly, in the interval period of two adjacent detection, air samples in the sampling tube 201 are kept consistent with air in a sampling environment through natural air flow;
then, the first linear module 203 runs to drive the blocking body 202 to move downwards to block the opening end of the sampling tube 201, the blocking body 202 continues to move downwards after blocking, the blocking body 202 is connected with the traction frame 204 through the matching of the buckle component and the jack 2024, and when the connection is completed, the end face of the Bao Fengban 2022 facing the sampling tube 201 contacts with the end face of the first side plate 2042 or the end face of the second side plate 2043 facing the sampling tube 201, and the two are matched to form a complete plane which also blocks the sampling tube 201;
then, the first linear module 203 operates to drive the blocking body 202 to move upwards, the blocking body 202 moves upwards together with the traction frame 204, two ends of the sampling tube 201 are blocked by the first side plate 2042 and the second side plate 2043 of the traction frame 204, and the piston 212 can form sliding fit with the sampling tube 201 at the moment;
then, the first driving part 213 operates to drive the piston 212 to move, the air sample in the sampling tube 201 is pushed towards the detection mechanism 300 through the connecting pipeline 214, and in the pushing process, external air enters the piston groove through the air hole 2044, so that the pressure at two sides of the piston 212 is kept consistent, and the external air cannot be mixed with the air sample due to the obstruction of the piston 212;
when the air sample in the sampling tube 201 is sent into the detecting mechanism 300 and the detection is finished, the first driving member 213 drives the piston 212 to move reversely to reset, then the first linear module 203 drives the plugging body 202 and the traction frame 204 to move upwards, in the upward moving process, the trip frame 206 contacts with the pushing support 210, so that the connection between the traction frame 204 and the plugging body 202 is released by the buckle assembly, the traction frame 204 moves downwards to reset under the action of gravity, and the first linear module 203 continues to drive the plugging body 202 to move upwards to reset.
In the above process:
1. firstly, two ends of a sampling tube 201 are plugged through a thin sealing plate 2022, so that after the sampling tube 201 is plugged by the thin sealing plate 2022, no matter the thin sealing plate 2022 is connected with a side plate I2042 or a side plate II 2043 or the thin sealing plate 2022 moves upwards, the side plate I2042 and the side plate II 2043 plug the sampling tube 201, and the sampling tube 201 is plugged, so that the processes cannot influence an air sample in the sampling tube 201;
further: a. bao Fengban 2022 is thin and has a blade formed at the bottom; b. bao Fengban 2022 is initially spaced from the sampling tube 201 by a distance which may be considered an acceleration phase, and the thin seal plate 2022 may be further moved down to connect with the first 2042 or the second 2043 204after the sampling tube 201 is plugged, and the further movement may be considered a deceleration phase, i.e.: bao Fengban 2022 has an acceleration stage before plugging the sampling tube 201 and a deceleration stage after plugging, so Bao Fengban 2022 can keep constant speed in the process of plugging the sampling tube 201; as can be seen from the combination of a and b, in the process of plugging the sampling tube 201 by the thin sealing plate 2022, the air fluctuation at the tube orifice of the sampling tube 201 is very weak and nearly none, so that the air sample in the sampling tube 201 can be regarded as not fluctuating, the air sample in the sampling tube 201 is consistent with the air in the sampling environment, the sampling is more accurate, and the accuracy of the subsequent detection result is further improved;
2. the air sample in the sampling tube 201 is sent into the detection mechanism 300 in a pushing manner by the piston 212, on one hand, the sampling tube 201 is not influenced by negative pressure generated after the air sample leaves, on the other hand, in the process of sending the air sample into the detection mechanism 300, the air sample is not contacted with the outside, on the basis, the thin sealing plate 2022 is connected with the side plate 2042 or the side plate 2043, and the air sample detection mechanism is characterized in that if the side plate 2042 and the side plate 2043 are directly driven to move to seal the sampling tube 201, because the side plate 2042 and the side plate 2043 are both provided with parts, the weight is larger, the cross section area is larger, air fluctuation is easy to be caused during movement unlike the thin sealing plate 2022, the air fluctuation is thinner and lighter, and the air fluctuation is difficult to be caused.
As shown in fig. 8 to 15, the detection mechanism 300:
as shown in fig. 8 to 11, the detecting mechanism 300 comprises a cylindrical outer casing 301 with an upper end open and a lower end closed, a casing cover 302 is mounted at the open end of the outer casing 301 in a matched manner, a rotary body 303 is coaxially sleeved in the outer casing 301, and the rotary body 303 is driven to rotate by a motor one 304 arranged at the closed end of the outer casing 301.
The terminal surface of rotator 303 runs through and has seted up the mounting hole, the mounting hole is provided with four sets of along the circumferencial direction array of rotator 303, every set of installation Kong Najun installs a set of detection room 305, detection room 305 is upper end opening, the lower extreme confined cylinder shape, specifically, as shown in fig. 12, the chamber bottom of detection room 305 is the circular cone shape and horizontal cross-sectional area increases gradually from bottom to top, the blind end coaxial of detection room 305 has seted up the valve opening, the lower drill way of valve opening extends there is fixed cover, fixed cover's lower opening department is provided with down hollow plate 3054, coaxial cover is equipped with core rod 3051 in the valve opening, the upper end of core rod 3051 is provided with and is located the shutoff core 3052 of detection room 305 in the toper shape, lower hollow plate 3054 is stretched out to the lower end of core rod 3051, the outside of core rod 3051 is provided with upper hollow plate 3053, lower hollow plate 3054 supports upper hollow plate 3053, the outside cover of core rod 3051 is equipped with the four 3055 of springs that are located between detection room 305 blind end and the upper hollow plate 3053, under the elastic force of four springs 5, under the initial state, the elastic force of four springs 5 is used for carrying out core 3055, the shutoff compression of core 3055 can be removed when the shutoff of core rod 3055 is big.
As shown in fig. 10, the cavity bottom of the outer casing 301 is coaxially provided with a ring groove 3011, and the fixing sleeve is positioned in the ring groove 3011.
In the initial state, the positions of the four groups of detection chambers 305 are classified into: the air sample collection device comprises a receiving position, a water removal position, a detection position and an emptying position, wherein the detection chamber 305 is used for receiving the air sample sent from the sampling mechanism 200 when being positioned at the receiving position, the water removal component 306 is used for carrying out water removal treatment on the air sample when being positioned at the water removal position, the detection component 307 is provided for carrying out methane detection on the air sample when being positioned at the detection device, and the emptying component is used for emptying the air sample and water when being positioned at the emptying position, so that the inside of the detection chamber 305 is in an approximately vacuum state.
Specifically, as shown in fig. 8, the cover 302 is provided with a receiving hole, and when the detecting chamber 305 is rotationally displaced to the receiving position, the receiving hole is communicated with the detecting chamber 305, the receiving hole is communicated with the connecting pipe 214, and the air sample enters the detecting chamber 305 through the connecting pipe 214.
Specifically, as shown in fig. 10, 13 and 14, the cover 302 is provided with a rotation hole, and when the detection chamber 305 is rotationally displaced to the water removal position, the rotation hole is coaxial with the detection chamber 305.
The closed end of the outer sleeve 301 is provided with a connection hole 3012 and the connection hole 3012 is coaxial with the rotation hole.
The dewatering subassembly 306 is including setting up the heat conduction piece 3061 in connecting hole 3012, be provided with the dodge mouth that is used for dodging fixed cover on the heat conduction piece 3061, the upper end of heat conduction piece 3061 is parallel and level with the chamber bottom of overcoat shell 301, the blind end of detection room 305 is same with the chamber bottom parallel and level of overcoat shell 301, so when detection room 305 rotatory displacement to dewatering position department, fixed cover is located dodge mouthful, and detection room 305 then contacts with heat conduction piece 3061, the bottom of heat conduction piece 3061 is provided with refrigerating element 3062, refrigerating element 3062 is prior art and can realize, for example semiconductor refrigeration technique, through refrigerating element 3062 and heat conduction piece 3061's cooperation, refrigerate detection room 305, make the moisture in the air sample in the detection room 305 condensed into liquid.
Further, in the condensation and water removal process, the water removal effect of the air sample located around the inner wall of the detection chamber 305 is best, and the water removal effect of the air sample gradually becomes worse when the air sample is closer to the axis of the detection chamber 305, so as to further condense and remove the water in the air sample, and ensure the accuracy of the subsequent detection result:
the water removal assembly 306 further includes an upper bracket 3063 disposed on the housing cover 302 and a rotating disk 3067 nested within the rotating bore, a lower end surface of the rotating disk 3067 coinciding with a lower aperture of the rotating bore.
The upper bracket 3063 is provided with a rotating shaft 3066 coaxial with the rotating plate 3067, the rotating shaft 3066 is in power connection with an output shaft of a second motor 3065 arranged on the upper bracket 3063, specifically, the output shaft of the second motor 3065 is in a hollow shaft shape and is in power connection with the rotating shaft 3066 in a spline mode, and when the rotating shaft 3066 moves, the output shaft of the second motor 3065 continuously outputs power to the rotating shaft 3066.
The upper bracket 3063 is provided with a second linear module 3064 connected to the upper end of the rotating shaft 3066 and used for pulling the rotating shaft 3066 to move.
The lower extreme of rotation axis 3066 is provided with the mounting disc, and the lower terminal surface of mounting disc is vertical to be extended downwards has blade 3068, and blade 3068 is provided with a plurality of groups along the circumferencial direction array of mounting disc, and the bottom of blade 3068 can pass the perforation that sets up on the rotary disk 3067.
In the initial state, the bottoms of the blades 3068 are overlapped with the lower end face of the rotating disc 3067, so that the through holes can be plugged;
when the detecting chamber 305 is rotationally shifted to a water removal position, and condensation water removal is carried out through the refrigerating element 3062, the linear module II 3064 drives the rotating shaft 3066 to move downwards, the rotating shaft 3066 moves downwards along with the mounting plate and the blades 3068, the blades 3068 extend into the detecting chamber 305, meanwhile, the motor II 3065 drives the rotating shaft 3066 to rotate, then air samples in the detecting chamber 305 are stirred through the blades 3068, the condensation water removal effect is improved, after the condensation water removal is finished, the linear module II 3064 drives the rotating shaft 3066 to move upwards, the blades 3068 are reset, and the penetrating holes are plugged.
Specifically, as shown in fig. 9 and 15, the detecting unit 307 includes an upper sleeve 3071 vertically disposed on the housing cover 302, and an inner cavity of the upper sleeve 3071 has a cylindrical shape, and when the detecting chamber 305 is rotationally displaced to the detecting position, the upper sleeve 3071 is coaxial with the detecting chamber 305.
The sliding sleeve is provided with a mounting body 3072 in the upper sleeve 3071, the bottom of the mounting body 3072 vertically extends downwards to form mounting rods 3074, the mounting rods 3074 are provided with two groups, one side of each of the two groups of mounting rods 3074, which is opposite to the other side, is provided with an embedded hole, one group of embedded holes is internally provided with an infrared light emitting element, the other group of embedded holes is internally provided with an infrared light receiving element, and the infrared light emitting element and the infrared light receiving element are realized in the prior art and are not repeated.
The cover 302 is provided with a hole for avoiding the mounting rod 3074, and in the initial state, the lower end surface of the mounting rod 3074 coincides with the lower opening of the hole.
The upper sleeve 3071 is provided with a second driving member 3073 for driving the mounting body 3072 to move in the upper sleeve 3071, and preferably, the mounting body 3072 and the mounting rod 3074 are hollow, and electric components such as related circuit wires are hidden in the mounting body 3072 and the mounting rod 3074.
When the detecting chamber 305 is rotated and shifted to the detecting position, the second driving member 3073 drives the mounting body 3072 and the mounting rod 3074 to move downwards, so that the infrared light emitting element and the infrared light receiving element extend into the detecting chamber 305, the method for detecting the air sample after water removal and methane infrared light detection can be realized in the prior art, and after the detection is finished, the second driving member 3073 drives the mounting body 3072 and the mounting rod 3074 to move upwards and reset.
Specifically, as shown in fig. 8 and 10, the groove bottom of the ring groove 3011 is provided with a connection groove 3013, and when the detection chamber 305 is rotationally displaced to the empty position, the detection chamber 305 is located directly above the connection groove 3013.
The bottom of the connecting groove 3013 is provided with a suction hole 3014 and a protruding block 3015, and the upper end of the protruding block 3015 is provided with a fourth inclined surface, which contacts the bottom of the core rod 3051 and lifts the core rod 3051 upward during the movement of the detecting chamber 305 toward the emptying position.
The evacuating assembly comprises a vacuum pump 308 arranged at the closed end of the outer casing 301, the input end of the vacuum pump 308 is communicated with the suction hole 3014, and the output end is provided with a discharge pipe 309; when the detection chamber 305 is rotationally displaced to the evacuation position, the stem 3051 is lifted up by the projection 3015, so that the valve hole is opened, and the vacuum pump 308 is operated to suck and discharge the water and air sample in the detection chamber 305, so that the vacuum state is approximately maintained.
The working process of the detection mechanism 300 is specifically:
first, the detection chamber 305 is evacuated by the evacuation assembly at an evacuation location;
then, the first motor 304 is operated to drive the rotating body 303 to rotate ninety degrees, so that the vacuumized detection chamber 305 is positioned at the receiving position and receives the air sample sent from the sampling mechanism 200;
then, the first motor 304 is operated to drive the rotating body 303 to rotate ninety degrees, so that the vacuumized detection chamber 305 is positioned at a water removal position, and the air sample in the detection chamber 305 is condensed and dehydrated through the water removal component 306;
then, the first motor 304 is operated to drive the rotating body 303 to rotate ninety degrees, so that the vacuumized detection chamber 305 is positioned at a detection position, and the air sample in the detection chamber 305 is subjected to methane detection through the detection component 307;
then, the first motor 304 is operated to drive the rotating body 303 to rotate ninety degrees, so that the vacuumized detection chamber 305 is positioned at the evacuation position, and the water and air samples in the detection chamber 305 are pumped and discharged through the evacuation assembly;
the above-mentioned detection process can be repeated every time of periodic monitoring because the air sample volume sampled by the sampling tube 201 is large, so that several groups of data can be obtained, and the final detection result can be obtained by means of comparison of several groups of data.
In this scheme, sharp module, driving piece can be electric telescopic handle technique, can be sharp lead screw step motor technique, can also be: the motor drives the screw rod to rotate, the screw rod rotates to drive the screw rod seat to move, and the screw rod seat moves with an object connected with the screw rod seat; and the like, which are all realized in the prior art and are not described in detail.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (6)
1. The utility model provides an offshore methane gas concentration monitoring system, its includes the installation housing, and the through-hole that is used for the air business turn over is seted up to the surface of installation housing, is provided with the frame in the installation housing, its characterized in that: the machine frame is provided with a sampling mechanism and a detection mechanism, the sampling mechanism is used for sampling an air sample, the sampled air sample is consistent with air in a sampling environment, and the detection mechanism is used for extracting the air sample and sequentially carrying out water removal and methane detection on the air sample;
the sampling mechanism comprises a sampling pipe which is horizontally arranged on the frame and is provided with openings at two ends, a plugging body which is arranged in a lifting way and is initially positioned above the sampling pipe, and a first linear module which is used for driving the plugging body to move along the vertical direction, wherein the plugging body comprises a connecting plate, two ends of the connecting plate vertically extend downwards to form thin sealing plates, opposite sides of the two groups of thin sealing plates are respectively overlapped with end faces at two ends of the sampling pipe, and side edges of the bottom ends of the two groups of thin sealing plates, which are opposite, are chamfered;
the sampling mechanism further comprises a traction frame positioned below the sampling tube, a guide rod which is vertically arranged is arranged on the frame, the traction frame and the guide rod form sliding connection, a tripping frame is arranged at the upper end of the guide rod, a first spring is sleeved outside the guide rod, and the first spring is provided with two groups and is respectively positioned at the upper side and the lower side of the joint of the guide rod and the traction frame;
the traction frame consists of a middle support and a first side plate and a second side plate which are arranged at two ends of the middle support, wherein the opposite side surfaces of the first side plate and the second side plate are respectively overlapped with the end surfaces of two ends of the sampling tube, the opposite side surfaces of the first side plate and the second side plate are provided with a clamping assembly, the clamping assembly is used for realizing detachable connection between the traction frame and the plugging body, and when the connection is completed, the end surface of Bao Fengban facing the sampling tube contacts with the end surface of the first side plate or the end surface of the second side plate facing the sampling tube, and the two end surfaces are matched to form a complete plane which plugs the sampling tube;
the first side plate is provided with a pipe hole, the pipe hole is communicated with the detection mechanism through a connecting pipeline, the side surface of the second side plate facing the sampling pipe is provided with a piston groove, a piston is sleeved in the piston groove, the traction frame is provided with a first driving piece for driving the piston to move, and the side surface of the second side plate facing away from the sampling pipe is provided with an air hole communicated with the piston groove;
the side surfaces of the two groups of thin sealing plates, which are opposite, are provided with side rods which are vertically arranged, the side rods are provided with two groups of side rods, the plane where the two groups of side rods are positioned is perpendicular to the axial lead of the sampling tube, and the opposite side surfaces of the two groups of side rods are provided with jacks;
the side of the side plate I, which is opposite to the side plate II, is provided with a mounting groove, the clamping assembly comprises two groups of clamping rods which are arranged in the mounting groove in a sliding manner, the sliding direction of the clamping rods is horizontally arranged and is perpendicular to the axial lead of the sampling tube, a spring II is arranged between the two groups of clamping rods, one side of the two groups of clamping rods, which is opposite to the other side, extends out of the mounting groove, the bottom of the side rod is provided with a bevel I, the distance between the bevels I on the two groups of side rods on the same group of thin sealing plates is reduced from bottom to top, and in the process of downward movement of the thin sealing plates, the bevel I is contacted with the end part of the clamping rod, which extends out of the mounting groove;
the buckle assembly further comprises a pushing support arranged at the upper end of the side plate I or the side plate II in the vertical direction and a spring III, wherein the spring is used for driving the pushing support to move upwards, an inclined plane II is arranged at the bottom of the pushing support, the inclined plane II stretches into the mounting groove, an inclined plane III is arranged at the upper end of the clamping rod, the distance between the inclined planes III on the two groups of clamping rods is decreased from bottom to top, the inclined plane II is attached to the inclined plane III, and two groups of inclined planes II are correspondingly arranged.
2. An offshore methane gas concentration monitoring system according to claim 1, wherein: the detection mechanism comprises a cylindrical outer casing with an opening at the upper end and a closed lower end, wherein a casing cover is arranged at the opening end of the outer casing in a matched manner, a rotary body is coaxially sleeved in the outer casing, and the rotary body is driven to rotate by a motor arranged at the closed end of the outer casing;
the terminal surface of rotator has run through and has been seted up the mounting hole, the mounting hole is provided with four sets of along the circumferencial direction array of rotator, install the detection room in the mounting hole, under the initial state, four sets of detection room place position names in proper order are receiving position, dewatering position, detect position and evacuation position, the detection room of receiving position department is used for receiving the air sample, dewatering position department is provided with the dewatering subassembly that is used for carrying out dewatering to the air sample, detect position department is provided with the detection subassembly that is used for carrying out methane detection to the air sample, evacuation position department is provided with the evacuation subassembly that is used for air sample and water exhaust.
3. An offshore methane gas concentration monitoring system according to claim 2, wherein: the detection chamber is in a cylindrical shape with an opening at the upper end and a closed lower end, a valve hole is formed in the closed end of the detection chamber, a fixed sleeve extends from the lower orifice of the valve hole, a lower hollowed-out plate is arranged at the lower opening of the fixed sleeve, a core rod is sleeved in the valve hole, a plugging core is arranged at the upper end of the core rod, the lower end of the core rod extends out of the lower hollowed-out plate, an upper hollowed-out plate is arranged outside the core rod, the lower hollowed-out plate supports the upper hollowed-out plate, a spring IV is sleeved outside the core rod and positioned between the closed end of the detection chamber and the upper hollowed-out plate, and in an initial state, the valve hole is plugged by the plugging core;
the cavity bottom of the outer sleeve shell is coaxially provided with a ring groove, and the fixed sleeve is positioned in the ring groove;
and the shell cover is provided with a receiving hole, when the detecting chamber is rotationally shifted to a receiving position, the receiving hole is communicated with the detecting chamber, and the receiving hole is communicated with the connecting pipeline.
4. An offshore methane gas concentration monitoring system according to claim 3, wherein: the shell cover is provided with a rotary hole, when the detection chamber is rotationally shifted to a water removal position, the rotary hole is coaxial with the detection chamber, the closed end of the outer shell is provided with a connecting hole, and the connecting hole is coaxial with the rotary hole;
the dewatering assembly comprises a heat conduction block arranged in the connecting hole, an avoidance opening for avoiding the fixed sleeve is formed in the heat conduction block, the upper end of the heat conduction block is flush with the closed end of the detection chamber, and a refrigerating element is arranged at the bottom of the heat conduction block.
5. An offshore methane gas concentration monitoring system according to claim 3, wherein: the detection assembly comprises an upper sleeve vertically arranged on the shell cover, and the upper sleeve is coaxial with the detection chamber when the detection chamber is rotationally shifted to a detection position;
the upper sleeve is internally provided with a mounting body in a sliding sleeve manner, the bottom of the mounting body vertically extends downwards to form mounting rods, two groups of mounting rods are arranged, one opposite sides of the two groups of mounting rods are provided with embedded holes, one group of embedded holes are internally provided with infrared light emitting elements, the other group of embedded holes are internally provided with infrared light receiving elements, the shell cover is provided with an avoidance hole for avoiding the mounting rods, the lower end face of the mounting rods coincides with the lower orifice of the avoidance hole in an initial state, and the upper sleeve is provided with a second driving piece for driving the mounting body to move.
6. An offshore methane gas concentration monitoring system according to claim 3, wherein: the tank bottom of annular is provided with the spread groove, the tank bottom of spread groove is provided with suction hole and lug, the upper end of lug is provided with inclined plane IV, evacuation subassembly is including setting up the vacuum pump at the overcoat shell blind end, the input and the suction hole intercommunication of vacuum pump, the output is provided with row material pipe, when detecting the rotatory aversion of room to evacuation position, detect the room and be located the spread groove directly over, at the in-process that detects the room and remove towards the evacuation position, inclined plane IV can take place to contact and jack up the core bar with the bottom of core bar.
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| CN117783451B (en) * | 2024-02-27 | 2024-05-14 | 山西锦丰大地精密机械有限公司 | Underground gas detection device |
| CN118130181B (en) * | 2024-05-08 | 2024-07-19 | 陕西省地质调查实验中心 | Methane sampling device and method thereof |
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| CN207408177U (en) * | 2017-11-01 | 2018-05-25 | 缪荣明 | Gas collecting device in dust work environment |
| CN108181442A (en) * | 2017-12-20 | 2018-06-19 | 中国石油天然气集团公司 | A kind of coal seam gas production well packing CH_4 detection real-time sampling device and its application |
| CN109541142A (en) * | 2018-11-28 | 2019-03-29 | 徐州江煤科技有限公司 | A kind of pump suction type CH_4 detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207408177U (en) * | 2017-11-01 | 2018-05-25 | 缪荣明 | Gas collecting device in dust work environment |
| CN108181442A (en) * | 2017-12-20 | 2018-06-19 | 中国石油天然气集团公司 | A kind of coal seam gas production well packing CH_4 detection real-time sampling device and its application |
| CN109541142A (en) * | 2018-11-28 | 2019-03-29 | 徐州江煤科技有限公司 | A kind of pump suction type CH_4 detection device |
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