CN117589527B - Sampling device for natural gas detection - Google Patents
Sampling device for natural gas detection Download PDFInfo
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- CN117589527B CN117589527B CN202311463221.8A CN202311463221A CN117589527B CN 117589527 B CN117589527 B CN 117589527B CN 202311463221 A CN202311463221 A CN 202311463221A CN 117589527 B CN117589527 B CN 117589527B
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- 238000005070 sampling Methods 0.000 title claims abstract description 226
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 239000003345 natural gas Substances 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000033001 locomotion Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000017105 transposition Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a sampling device for natural gas detection, and relates to the technical field of natural gas sampling; the device comprises a natural gas pipeline, wherein a main valve is arranged on the natural gas pipeline, a sampling pipe is connected to the outer side of the natural gas pipeline, and one end of the sampling pipe is connected with a sampling box; the inner part of the sampling box is rotatably provided with a mounting ring, the mounting ring is provided with a sampling container for quantitative sampling, the inner bottom end of the sampling box is provided with a sampling communicating box communicated with a sampling pipe, the top of the sampling box is provided with a sampling valve, the sampling valve is rotatably provided with a steering wheel, the sampling communicating box is provided with a sampling valve, and the sampling valve and the steering wheel are respectively communicated with sampling pieces; the invention can take a plurality of samples in one sampling work and take samples with different amounts; the sampling efficiency is improved; the communication state of the sampling equipment and the gas pipeline can be isolated, and the occurrence risk of chain reaction is reduced.
Description
Technical Field
The invention relates to the technical field of natural gas sampling, in particular to a sampling device for natural gas detection.
Background
Natural gas is a mixture of hydrocarbon and non-hydrocarbon gases naturally deposited in a formation, and is mainly used as fuel for producing carbon black, chemicals and liquefied petroleum gas; natural gas is closely related to life of people and is applied to various fields; in order to facilitate the collection of natural gas, a pipeline for extracting the natural gas is arranged on the ground surface of a gas rich area, so that the natural gas is required to be periodically sampled and detected in order to ensure the purity of the natural gas, the existing detection sampling equipment is generally provided with sampling equipment on the gas pipeline, and when sampling is required, the on-off valve is manually controlled and then sampling is carried out.
The Chinese patent with the bulletin number of CN210981934U discloses a natural gas sampling detection device, which comprises a sampling collection pipe, a backflow prevention device, a first storage tank and a second storage tank, wherein a connecting flange is fixedly arranged at one end of the sampling collection pipe, the other end of the sampling collection pipe is connected with one end of the backflow prevention device, and the problem of inaccurate detection caused by the backflow phenomenon of gas is solved in the patent from the aspect of recording.
Disclosure of Invention
Aiming at the technical problems, the invention can take a plurality of samples in one sampling work and take samples with different amounts; the sampling efficiency is improved; the communication state of the sampling equipment and the gas pipeline can be isolated, and the occurrence risk of chain reaction is reduced.
The technical scheme adopted by the invention is as follows: the sampling device for natural gas detection comprises a natural gas pipeline, wherein a main valve is arranged on the natural gas pipeline, a sampling pipe is connected to the outer side of the natural gas pipeline, and one end of the sampling pipe is connected with a sampling box; the inner part of the sampling box is rotatably provided with a mounting ring, the mounting ring is provided with a sampling container for quantitative sampling, and the side surface and the bottom end of the sampling container are respectively provided with an electric valve; a sampling communicating box communicated with a sampling pipe is arranged at the bottom end of the inside of the sampling box, a sample outlet valve is arranged at the top of the sampling box, a steering wheel is rotatably arranged on the sample outlet valve, a sampling valve is arranged on the sampling communicating box, and sampling pieces are respectively communicated with the sampling valve and the steering wheel; the sampling piece comprises a sampling tube, a control electric cylinder is arranged on the outer side of the sampling tube, one end of the sampling tube is movably connected with a matching disc, the control electric cylinder controls the matching disc to slide, a matching interface and a sealing groove are arranged on the matching disc, an air bag is arranged in the sealing groove, and the air bag is inflated through an inflator pump arranged on the matching disc; the sampling piece communicated with the sampling valve pumps the sample into the sampling container; the sampling piece communicated with the steering wheel conveys the sample in the sampling container to the outside through the sample outlet valve; the bottom end of the sampling box is provided with an intermittent on-off assembly, the intermittent on-off assembly comprises a movable valve plate which is rotatably arranged in the sampling tube, one end of the movable valve plate is connected with a valve plate gear, the outer side of the sampling tube is slidably connected with a movable frame, two sides of the movable frame are respectively connected with a rack and a pawl bar, a rotating shaft is rotatably arranged on the sampling box, two ends of the rotating shaft are respectively connected with a ratchet wheel and a reversing gear ring, the reversing gear ring is used for driving a mounting ring, the ratchet wheel is meshed with the pawl bar, and the valve plate gear is meshed with the rack; the movable frame slides reciprocally, so that the ratchet wheel, the rotating shaft, the reversing gear ring and the mounting ring rotate unidirectionally, and the movable valve plate rotates reciprocally in the sampling pipe to control intermittent on-off of natural gas.
Further, a main valve is arranged on the outer side of the natural gas pipeline and used for controlling the on-off state of natural gas between the sampling pipe and the natural gas pipeline; the outer side of the natural gas pipeline is provided with a positioning rod, the main valve is provided with a jack, and the positioning rod is matched with the jack on the main valve to fix the main valve.
Further, a quantitative plate is arranged in the sampling container in a sliding manner, a screw rod and a guide rod are connected to the quantitative plate, a second meshing gear is rotatably arranged at the top of the sampling container, and the second meshing gear and the screw rod form a screw pair; an engagement electric cylinder is arranged on the outer side of the sampling box, an engagement motor is arranged on a telescopic rod of the engagement electric cylinder, an output shaft of the engagement motor is connected with an engagement gear I, and the engagement motor is engaged with an engagement gear II through the engagement gear I so as to drive the quantitative plate to move.
Further, the mounting ring consists of a connecting ring, a connecting rod and a gear ring, and two ends of the connecting rod are respectively connected with the connecting ring and the gear ring; the reversing gear ring and the gear ring on the intermittent on-off assembly form a gear pair; the sampling container is arranged on the connecting ring, and the sampling container is carried by the connecting ring to rotate so as to perform transposition.
Further, a collecting box is arranged at the bottom end inside the sampling box, and two collecting valves are arranged on the collecting box, wherein one collecting valve is communicated with a sampling piece communicated with the sampling valve so as to collect samples remained in the sampling piece; the other collection valve is in communication with the sampling tube.
Further, a steering motor is arranged at the top of the sampling box, a steering gear is connected to an output shaft of the steering motor, and the steering gear and a steering wheel form a gear pair; a connecting pipe is connected to the steering wheel, and one end of the connecting pipe is communicated with the sample outlet valve; the sampling part communicated with the steering wheel is communicated with the connecting pipe; the sampling part on the steering wheel is shifted by the rotation of the steering wheel.
Further, the intermittent on-off assembly comprises a driving motor arranged on the outer side of the sampling tube, a driving gear is connected to an output shaft of the driving motor, and the driving gear and the valve plate gear form a gear pair; a friction wheel is arranged on the rotating shaft; a moving rod is slidably arranged at one end of the moving frame, and a moving rod spring for providing elasticity is connected between the moving rod and the moving frame; a sliding seat is arranged at the bottom of the sampling box in a sliding manner, and a sliding seat spring is connected between the sliding seat and the sampling box; and one end of the sliding seat is connected with a friction frame, and the friction frame is used for limiting the rotation of the rotating shaft when contacting with the friction wheel.
Further, a sliding groove is formed in the sliding seat, the sliding groove is formed by a, b, c, d, e sections, and the moving rod moves in the sliding groove; when the motion rod moves in the section a, the sliding seat is extruded and slides, so that the friction frame is contacted with the friction wheel to limit the rotation of the rotating shaft; when the motion rod moves in the section b, the contact state of the friction frame and the friction wheel is maintained; when the motion rod moves in the section c, the sliding seat returns to the initial position under the elastic force of the sliding seat spring, and the friction frame is separated from contact with the friction wheel; when the motion rod moves in the section d, the friction frame is kept in a state of being separated from the friction wheel, and the ratchet wheel, the rotating shaft and the reversing gear ring rotate under the engagement of the pawl bar and the ratchet wheel; when the moving rod moves in the section e, the moving rod is extruded to slide so as to deviate to the section a, so that the moving rod reciprocates along the section a, b, c, d, e, and the sliding seat is pushed to slide in a reciprocating manner.
Compared with the prior art, the invention has the beneficial effects that: (1) The main valve controls the on-off state of the natural gas and the sampling pipe, when the main valve is opened, the natural gas is introduced into the sampling pipe, and the movable valve plate isolates the natural gas in the sampling pipe, so that the risk of a chain reaction accident is reduced; (2) According to the invention, the movable valve plate rotates reciprocally, so that a sample intermittently enters the sampling communication box, and when sampling is not performed, natural gas is isolated through the movable valve plate, so that the aim of reducing the risk of chain reaction is fulfilled; (3) After the sampling container in one direction is sampled, the invention collects and recovers the residual sample in the sampling communicated with the sampling valve through the collecting valve, namely, the residual sample is collected into the collecting box; when the sampling pipe is required to be detached from the natural gas pipeline, the main valve is closed, and then the natural gas remained in the sampling pipe is collected and recovered through the collecting valve communicated with the sampling pipe; leakage during disassembly is prevented; (4) The invention can quantitatively process the sampling container, when the sampling container is changed to the sampling area, the meshing electric cylinder works, the meshing gear I is controlled to be meshed with the meshing gear II on the sampling container, the meshing motor works, namely the screw rod and the quantitative plate are driven to slide, and the sampling amount is regulated.
Drawings
In order to more clearly illustrate the technical solutions in the prior art or in the embodiments of the present invention, the following brief description is given of the drawings used in the description of the prior art or the embodiments.
FIG. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a partial cross-sectional view of a sampling tube according to the present invention.
Fig. 3 is a schematic view showing the internal structure of the sample box of the present invention.
FIG. 4 is a schematic view of a sampling vessel according to the present invention.
Fig. 5 is a schematic view of an intermittent on-off assembly of the present invention.
Fig. 6 is a schematic view of a slider according to the present invention.
Fig. 7 is an enlarged view of the present invention at the a mark in fig. 5.
FIG. 8 is a schematic view of the installation of a sample member of the present invention.
Fig. 9 is a schematic diagram of a sample member of the present invention.
Reference numerals: 1-a natural gas pipeline; 2-a main valve; 3-positioning rods; 4-sampling tube; 6, sampling box; 7-engaging an electric cylinder; 8-steering motor; 9-a sample outlet valve; 10-driving a motor; 11-a drive gear; 12-a valve plate gear; 13-a movable valve plate; 14-an engaged motor; 15-meshing gear one; 16-connecting ring; 17-connecting rods; 18-a gear ring; 19-reversing gear ring; 20-rotating shaft; 21-friction wheel; 22-ratchet wheel; 23-sampling container; 24-steering gear; 25-steering wheel; 26-a screw rod; 27-meshing gear two; 28-a metering plate; 29-a guide rod; 30-moving a frame; 3001-rack; 3002-detent bars; 31-a motion bar; 32-a slide; 33-a slide spring; 34-friction frame; 35-a motion bar spring; 36-sampling a communication box; 37-sampling valve; 38-collecting box; 39-a collection valve; 40-connecting pipes; 41-a sampling tube; 42-controlling an electric cylinder; 43-mating disc; 44-mating interface; 45-inflator pump; 46-an air bag.
Detailed Description
In order that those skilled in the art will better understand the present solution, a technical solution according to an embodiment of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiment is only a part of the embodiment of the present application, not all of the embodiment. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
It should be noted that the terms "first," "second," and the like in the claims and description herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application can be understood by those skilled in the art according to the specific circumstances. In addition, the term "plurality" shall mean two as well as more than two. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, a main valve 2 is arranged on a natural gas pipeline 1, a sampling pipe 4 is connected to the outer side of the natural gas pipeline 1, and one end of the sampling pipe 4 is connected to a sampling box 6; the outer side of the natural gas pipeline 1 is provided with a main valve 2 for controlling the on-off state of natural gas between the sampling pipe 4 and the natural gas pipeline 1; the outside of the natural gas pipeline 1 is provided with a positioning rod 3, the main valve 2 is provided with a jack, and the positioning rod 3 is matched with the jack on the main valve 2 to fix the main valve 2.
As shown in fig. 3, the inside of the sampling box 6 is rotatably provided with a mounting ring, the mounting ring is composed of a connecting ring 16, a connecting rod 17 and a gear ring 18, and two ends of the connecting rod 17 are respectively connected with the connecting ring 16 and the gear ring 18; the sampling containers 23 are arranged on the connecting ring 16 in a circular array; the side surface and the bottom end of the sampling container 23 are respectively provided with an electric valve; as shown in fig. 4, a quantitative plate 28 is slidably arranged in the sampling container 23, a screw rod 26 and a guide rod 29 are connected to the quantitative plate 28, a second meshing gear 27 is rotatably arranged at the top of the sampling container 23, and the second meshing gear 27 and the screw rod 26 form a screw pair; as shown in fig. 1, an engagement cylinder 7 is arranged on the outer side of the sampling box 6, an engagement motor 14 is arranged on a telescopic rod of the engagement cylinder 7, an engagement gear 15 is connected to an output shaft of the engagement motor 14, and the engagement motor is engaged with an engagement gear 27 through the engagement gear 15 to drive a metering plate 28 to move.
As shown in fig. 1 to 9, a sampling communicating box 36 communicating with the sampling pipe 4 is arranged at the inner bottom end of the sampling box 6, a sample outlet valve 9 is arranged at the top of the sampling box 6, a steering wheel 25 is rotatably arranged on the sample outlet valve 9, a sampling valve 37 is arranged on the sampling communicating box 36, and sampling pieces are respectively communicated with the sampling valve 37 and the steering wheel 25; the top of the sampling box 6 is provided with a steering motor 8, an output shaft of the steering motor 8 is connected with a steering gear 24, and the steering gear 24 and a steering wheel 25 form a gear pair; a connecting pipe 40 is connected to the steering wheel 25, and one end of the connecting pipe 40 is communicated with the sample outlet valve 9; the sampling member, which is communicatively provided on the steering wheel 25, is communicated with the connection pipe 40; the sampling piece includes sampling tube 41, and the outside of sampling tube 41 is provided with control jar 42, and the one end swing joint of sampling tube 41 has cooperation dish 43, and control jar 42 controls cooperation dish 43 and slides, is provided with cooperation interface 44 and seal groove on the cooperation dish 43, is provided with gasbag 46 in the seal groove, and gasbag 46 aerifys through the pump 45 that sets up on cooperation dish 43.
The bottom end inside the sampling box 6 is provided with a collecting box 38, the collecting box 38 is provided with two collecting valves 39, and one collecting valve 39 is communicated with a sampling piece communicated with the sampling valve 37 so as to collect samples remained in the sampling piece; another collection valve 39 communicates with the sampling tube 4; when the sampling pipe 4 is detached from the natural gas pipeline 1, the natural gas remaining in the sampling pipe 4 is collected.
An intermittent on-off assembly is arranged at the bottom end of the sampling box 6, the intermittent on-off assembly comprises a movable valve plate 13 rotatably arranged in the sampling tube 4, one end of the movable valve plate 13 is connected with a valve plate gear 12, a driving motor 10 is arranged at the outer side of the sampling tube 4, a driving gear 11 is connected to an output shaft of the driving motor 10, and the driving gear 11 and the valve plate gear 12 form a gear pair; a movable frame 30 is slidably connected to the outer side of the sampling tube 4, racks 3001 and pawl strips 3002 are respectively connected to two sides of the movable frame 30, a rotating shaft 20 is rotatably arranged on the sampling box 6, a ratchet wheel 22 and a reversing gear ring 19 are respectively connected to two ends of the rotating shaft 20, the reversing gear ring 19 is meshed with the gear ring 18, the ratchet wheel 22 is meshed with the pawl strips 3002, and a valve plate gear 12 is meshed with the racks 3001; a friction wheel 21 is arranged on the rotating shaft 20; a moving rod 31 is slidably installed at one end of the moving frame 30, and a moving rod spring 35 for providing elastic force is connected between the moving rod 31 and the moving frame 30; a sliding seat 32 is slidably arranged at the bottom of the sampling box 6, and a sliding seat spring 33 is connected between the sliding seat 32 and the sampling box 6; a friction frame 34 is connected to one end of the slide 32, and the friction frame 34 is contacted with the friction wheel 21 to limit the rotation of the rotating shaft 20; the slide 32 is provided with a chute which is formed by a, b, c, d, e sections, and the moving rod 31 moves in the chute; when the moving rod 31 moves in the section a, the sliding seat 32 is extruded to slide, so that the friction frame 34 is contacted with the friction wheel 21 to limit the rotation of the rotating shaft 20; when the movement rod 31 moves in the section b, the contact state of the friction frame 34 and the friction wheel 21 is maintained; when the moving rod 31 moves in the section c, the sliding seat 32 returns to the initial position under the elasticity of the sliding seat spring 33, and the friction frame 34 is separated from contact with the friction wheel 21; when the motion rod 31 moves in the section d, the friction frame 34 is kept in a state of being out of contact with the friction wheel 21, and the ratchet wheel 22, the rotating shaft 20 and the reversing gear ring 19 rotate under the engagement of the pawl strip 3002 and the ratchet wheel 22; when the moving rod 31 moves in the section e, the moving rod 31 is extruded to slide so as to deviate to the section a, so that the moving rod 31 reciprocates along a, b, c, d, e, and the sliding seat 32 is pushed to slide reciprocally.
Working principle: the main valve 2 controls the on-off state of the natural gas and the sampling pipe 4, and the positioning rod 3 is used for positioning and fixing the state of the main valve 2; when the main valve 2 is opened, natural gas is introduced into the sampling pipe 4, and the movable valve plate 13 isolates the natural gas in the sampling pipe 4, so that the risk of a chain reaction accident is reduced; when sampling is required, the driving motor 10 works, the movable valve plate 13 and the valve plate gear 12 rotate under the transmission of gears, a sample enters the sampling communication box 36 from the sampling pipe 4, a sampling piece on the sampling valve 37 is matched with an electric valve at the bottom end of the sampling container 23, the electric cylinder 42 is controlled to control the matching disc 43 to slide, an electric valve interface at the bottom end of the sampling container 23 is matched with the matching interface 44, the air bag 46 is a sealing groove, the interface on the electric valve is arranged in the sealing groove, and the air bag 46 is inflated by the inflator pump 45 to ensure the tightness, so that the air bag 46 is inflated, and a gap between the interface and the matching interface 44 is sealed; when the valve plate gear 12 and the movable valve plate 13 rotate, the movable frame 30 slides, the pawl strip 3002 drives the ratchet wheel 22 in a unidirectional way, the movable rod 31 reciprocates along a, b, c, d, e, and the sliding seat 32 is further pushed to slide in a reciprocating way, so that the friction frame 34 contacts with or breaks away from the friction wheel 21, and when the friction frame 34 contacts with the friction wheel 21, under the friction action, the rotating shaft 20 does not rotate so as to offset the influence brought by the meshing contact of the pawl strip 3002 and the ratchet wheel 22; when the friction frame 34 is out of contact with the friction wheel 21, the pawl strip 3002 drives the ratchet wheel 22 to rotate so as to realize transposition of the sampling containers 23, namely, sampling of the sampling containers 23 in different directions is finished respectively; through the reciprocal rotation of movable valve plate 13 for the sample intermittent type nature enters into in the sample intercommunication case 36, and when not taking a sample, through the isolated natural gas of movable valve plate 13, reaches the purpose of reducing the chain reaction risk.
After sampling is completed on the sampling container 23 in one direction, the residual sample in the sample communicated with the sampling valve 37 is collected and recovered through the collecting valve 39, namely, the residual sample is collected in the collecting box 38; when the sampling pipe 4 is required to be detached from the natural gas pipeline 1, the main valve 2 is closed firstly, and then the natural gas remained in the sampling pipe 4 is collected and recovered through the collecting valve 39 communicated with the sampling pipe 4; leakage during disassembly is prevented.
The sampling container 23 can perform quantitative treatment, when the sampling container 23 is changed to a sampling area, the meshing electric cylinder 7 works, the meshing gear I15 is controlled to be meshed with the meshing gear II 27 on the sampling container 23, the meshing motor 14 works, namely the driving screw rod 26 and the quantitative plate 28 slide, and the sampling amount is regulated; after the sampling is completed, the sample collected in the sampling container 23 is taken out, namely, the sample is operated through the steering motor 8, the steering wheel 25 rotates under the gear transmission, a sampling piece communicated with the steering wheel 25 moves along with the steering wheel 25, and the sampling piece is matched with an electric valve on the side surface of the sampling container 23 so as to draw out the sample in the sampling container 23 through the sample outlet valve 9, so that the sampling flow of the sample is completed.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which are extended therefrom are still within the scope of the present innovative teachings.
Claims (4)
1. The sampling device for natural gas detection comprises a natural gas pipeline (1), wherein a main valve (2) is arranged on the natural gas pipeline (1), a sampling pipe (4) is connected to the outer side of the natural gas pipeline (1), and one end of the sampling pipe (4) is connected with a sampling box (6); the method is characterized in that: the inside of the sampling box (6) is rotatably provided with a mounting ring, the mounting ring is provided with a sampling container (23) for quantitative sampling, and the side surface and the bottom end of the sampling container (23) are respectively provided with an electric valve; a sampling communication box (36) communicated with the sampling pipe (4) is arranged at the bottom end of the inside of the sampling box (6), a sample outlet valve (9) is arranged at the top of the sampling box (6), a steering wheel (25) is rotatably arranged on the sample outlet valve (9), a sampling valve (37) is arranged on the sampling communication box (36), and sampling pieces are respectively communicated with the sampling valve (37) and the steering wheel (25); the sampling part comprises a sampling tube (41), a control electric cylinder (42) is arranged on the outer side of the sampling tube (41), one end of the sampling tube (41) is movably connected with a matching disc (43), the control electric cylinder (42) controls the matching disc (43) to slide, a matching interface (44) and a sealing groove are arranged on the matching disc (43), an air bag (46) is arranged in the sealing groove, and the air bag (46) is inflated through an inflator pump (45) arranged on the matching disc (43); a sampling member connected to a sampling valve (37) for drawing a sample into a sampling container (23); the sampling part communicated with the steering wheel (25) conveys the sample in the sampling container (23) to the outside through the sample outlet valve (9); an intermittent on-off assembly is arranged at the bottom end of the sampling box (6), the intermittent on-off assembly comprises a movable valve plate (13) which is rotatably arranged inside the sampling tube (4), one end of the movable valve plate (13) is connected with a valve plate gear (12), a movable frame (30) is slidably connected to the outer side of the sampling tube (4), racks (3001) and pawl strips (3002) are respectively connected to two sides of the movable frame (30), a rotating shaft (20) is rotatably arranged on the sampling box (6), a ratchet wheel (22) and a reversing gear ring (19) are respectively connected to two ends of the rotating shaft (20), the reversing gear ring (19) is used for driving a mounting ring, the ratchet wheel (22) is meshed with the pawl strips (3002), and the valve plate gear (12) is meshed with the racks (3001); the movable frame (30) slides reciprocally, so that the ratchet wheel (22), the rotating shaft (20), the reversing gear ring (19) and the mounting ring rotate unidirectionally, and the movable valve plate (13) rotates reciprocally in the sampling pipe (4) to control intermittent on-off of natural gas;
The inside of the sampling container (23) is slidably provided with a quantitative plate (28), the quantitative plate (28) is connected with a screw rod (26) and a guide rod (29), a meshing gear II (27) is rotatably arranged at the top of the sampling container (23), and the meshing gear II (27) and the screw rod (26) form a screw pair; an engagement electric cylinder (7) is arranged at the outer side of the sampling box (6), an engagement motor (14) is arranged on a telescopic rod of the engagement electric cylinder (7), an engagement gear I (15) is connected to an output shaft of the engagement motor (14), and the engagement motor is engaged with an engagement gear II (27) through the engagement gear I (15) so as to drive a quantitative plate (28) to move;
A steering motor (8) is arranged at the top of the sampling box (6), a steering gear (24) is connected to an output shaft of the steering motor (8), and the steering gear (24) and a steering wheel (25) form a gear pair; a connecting pipe (40) is connected to the steering wheel (25), and one end of the connecting pipe (40) is communicated with the sample outlet valve (9); the sampling piece communicated with the steering wheel (25) is communicated with the connecting pipe (40); the sampling piece on the steering wheel (25) is shifted by rotating the steering wheel (25);
The intermittent on-off assembly comprises a driving motor (10) arranged at the outer side of the sampling tube (4), a driving gear (11) is connected to an output shaft of the driving motor (10), and the driving gear (11) and a valve plate gear (12) form a gear pair; a friction wheel (21) is arranged on the rotating shaft (20); a moving rod (31) is slidably arranged at one end of the moving frame (30), and a moving rod spring (35) for providing elasticity is connected between the moving rod (31) and the moving frame (30); a sliding seat (32) is arranged at the bottom of the sampling box (6) in a sliding manner, and a sliding seat spring (33) is connected between the sliding seat (32) and the sampling box (6); a friction frame (34) is connected to one end of the sliding seat (32), and the friction frame (34) is used for limiting the rotation of the rotating shaft (20) when contacting with the friction wheel (21);
A sliding groove is formed in the sliding seat (32), the sliding groove is formed by a, b, c, d, e sections, and the moving rod (31) moves in the sliding groove; when the moving rod (31) moves in the section a, the sliding seat (32) is extruded to slide, so that the friction frame (34) is contacted with the friction wheel (21) to limit the rotation of the rotating shaft (20); when the motion rod (31) moves in the section b, the contact state of the friction frame (34) and the friction wheel (21) is maintained; when the motion rod (31) moves in the section c, the sliding seat (32) returns to the initial position under the elasticity of the sliding seat spring (33), and the friction frame (34) is separated from contact with the friction wheel (21); when the motion rod (31) moves in the section d, the friction frame (34) is kept in a state of being separated from contact with the friction wheel (21), and the ratchet wheel (22), the rotating shaft (20) and the reversing gear ring (19) rotate under the meshing of the pawl strip (3002) and the ratchet wheel (22); when the moving rod (31) moves in the section e, the moving rod (31) is extruded to slide so as to deviate to the section a, so that the moving rod (31) reciprocates along the section a, b, c, d, e, and the sliding seat (32) is pushed to slide in a reciprocating manner.
2. The sampling device for natural gas detection as defined in claim 1, wherein: the outer side of the natural gas pipeline (1) is provided with a main valve (2) for controlling the on-off state of natural gas between the sampling pipe (4) and the natural gas pipeline (1); the outside at natural gas line (1) is provided with locating lever (3), is provided with the jack on main valve (2), cooperates with jack on main valve (2) through locating lever (3) to fix main valve (2).
3. The sampling device for natural gas detection as defined in claim 1, wherein: the mounting ring consists of a connecting ring (16), a connecting rod (17) and a gear ring (18), and two ends of the connecting rod (17) are respectively connected with the connecting ring (16) and the gear ring (18); a reversing gear ring (19) and a gear ring (18) on the intermittent on-off assembly form a gear pair; the sampling container (23) is arranged on the connecting ring (16), and the sampling container (23) is carried by the connecting ring (16) to rotate for transposition.
4. The sampling device for natural gas detection as defined in claim 1, wherein: the bottom end inside the sampling box (6) is provided with a collecting box (38), the collecting box (38) is provided with two collecting valves (39), and one collecting valve (39) is communicated with a sampling piece communicated with the sampling valve (37) so as to collect samples remained in the sampling piece; the other collecting valve (39) is communicated with the sampling pipe (4).
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| CN117589527A (en) | 2024-02-23 |
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