CN112285297A - Cable internal methane gas detection device - Google Patents
Cable internal methane gas detection device Download PDFInfo
- Publication number
- CN112285297A CN112285297A CN202011281356.9A CN202011281356A CN112285297A CN 112285297 A CN112285297 A CN 112285297A CN 202011281356 A CN202011281356 A CN 202011281356A CN 112285297 A CN112285297 A CN 112285297A
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- Prior art keywords
- cable
- methane gas
- socket
- gas
- methane
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- 239000005060 rubber Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 55
- 238000009413 insulation Methods 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 206010003591 Ataxia Diseases 0.000 description 1
- 208000001034 Frostbite Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0047—Organic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention relates to a device for detecting methane gas in a cable, which is used for detecting the methane gas in the cable, and comprises a gas sensor with a methane detection function, a main circuit board, a display screen and a shell for supporting the whole device, wherein the main circuit board is respectively connected with the gas sensor and the display screen, the shell is provided with a socket, the outer side of the socket is connected with a cable fixing pipe, the cable fixing pipe is of a tubular structure, rubber is circumferentially arranged along the same cross section of the inner surface, fixing holes are formed, at least one fixing hole is positioned at one end of the cable fixing pipe, which is far away from the socket, and the cable is connected into the socket through the fixing hole and is opposite to the. Compared with the prior art, the invention can detect the methane gas in the cable, and ensure the stability and reliability of the methane detection result.
Description
Technical Field
The invention relates to the field of detection of methane gas in a cable, in particular to a device for detecting methane gas in a cable.
Background
In the process of manufacturing an insulated cable, a part of decomposition products generated by decomposition of DCP by heat escape through the insulation surface to mix with nitrogen in the crosslinking tube, a pungent odor is generated at the crosslinking reaction due to molecules such as methane in the decomposition products, methane is detected at a nitrogen gas discharge port, and due to the decomposition, when the cooling section of the crosslinking tube is not long enough, or the heating temperature is high, the linear speed is fast, and the cooling is insufficient, the decomposition products of DCP such as water vapor in the XLPE insulation rapidly expand at normal pressure to generate gas. According to the ideal gas equation calculation, the following can be known: when the pressure of the cable insulation in the cross-linking pipe is 10bar atmospheric pressure, the pressure of the cable insulation after sealing is 1bar atmospheric pressure, and the volume of gas in the cable is enlarged by about 10 times. In actual production, the just cross-linked insulated wire core needs to be left for a period of time to flow into the next process. Firstly, the insulation layer thickness generates relatively more DCP decomposition products; secondly, the thicker the insulating layer, the slower the volatilization speed of the decomposition products. If the metallic aluminum sheath is used before the methane remaining in the crosslinked polyethylene insulation is volatilized, the decomposed substances are difficult to volatilize from the insulation surface and can only slowly volatilize through the gaps in the wire core. Because most cables are stacked in the open air after a long time from leaving factory to laying, if the cables just touch high-temperature weather, the volatilization speed of decomposed substances is greatly accelerated along with the temperature rise, and at the moment, a large amount of methane is rapidly diffused to the two ends of the cable head through gaps. Therefore, in the production process, a high attention needs to be paid to methane gas remaining in the crosslinked polyethylene insulation.
At present, the existing detection device for methane gas only is used for monitoring gas leaked in a fixed space, methane is basically non-toxic to people, but when the concentration is too high, the oxygen content in the air is obviously reduced, and people are suffocated. When the methane content in the air reaches 25% -30%, headache, dizziness, asthenia, inattention, acceleration of respiration and heartbeat, and ataxia can be caused. If not kept away in time, asphyxia can occur. Skin contact liquefied methane can cause the frostbite to methane is flammable explosive gas, and when there was methane gas in the cable inside, the welding was dragged in succession and is buckled the high temperature high pressure that produces and very easily arouse methane gas's burning explosion, because inside the confined cable, inside gas was hardly detected to external detection device, so there is very big hidden danger.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a cable internal methane gas detection device capable of reliably measuring the methane gas in the cable.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an inside methane gas detection device of cable for detect the interior methane gas of cable conductor, the device is including gas sensor, main circuit board, the display screen that has methane detection function and the casing that supports whole device, main circuit board connects respectively gas sensor and display screen, the casing is equipped with the socket, and the outside of this socket is connected with the fixed pipe of cable, and the fixed pipe of this cable is the tubular structure, is equipped with rubber along the same cross section circumference of internal surface to be formed with the fixed orifices, at least one the fixed orifices is located the fixed pipe of cable is kept away from the one end of socket, the cable conductor process the fixed orifices inserts the socket, and just right gas sensor.
Further, the cable fixing tube is detachably connected with the socket.
Further, the cable fixing tube is in threaded connection with the socket, an external thread is arranged on the outer side of the socket, an internal thread is arranged on the inner side of the cable fixing plate, and the external thread is matched with the internal thread.
Further, the number of the fixing holes is plural.
Furthermore, the sum of the widths of the rubbers corresponding to all the fixing holes in the cable fixing tube is not less than one third of the length of the cable fixing tube, and the width of the rubbers is the width of the rubbers along the length direction of the cable fixing tube.
Further, the fixing hole is flower-shaped.
Further, the fixing hole comprises a circular through hole in the center and a plurality of petal-shaped through holes distributed around the circular through hole, and the outer circumferential diameters of the petal-shaped through holes are larger than the outer circumferential diameter of the cable.
Further, the device for detecting methane gas in the cable further comprises a buzzer, and the buzzer is connected with the main circuit board.
Further, the inside methane gas detection device of cable still includes the alarm lamp, and this alarm lamp is connected main circuit board.
Further, the number of the gas sensors is multiple, and each gas sensor is connected with the main circuit board.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, by arranging the gas sensor with a methane detection function, external methane gas leakage and methane gas in the cable can be simultaneously alarmed; in consideration of the facts that after the device is inserted into a cable, communication with a socket is blocked due to bending of the cable, gas in the cable cannot be smooth possibly, and accuracy of a methane detection result is affected, the cable fixing pipe is connected to the outer side of the socket, and a fixing hole is formed in the pipe through rubber to fix the cable, so that bending is prevented, the problems are solved, and accuracy of the methane detection result is improved.
(2) The cable fixing pipe and the socket are detachably connected and are convenient to carry, and detection and alarm of external methane gas can be realized after the cable fixing pipe is detached.
(3) A plurality of fixing holes formed by rubber can be arranged in the cable fixing pipe, so that multipoint balanced fixation of the cable is realized; the sum of the widths of the rubber in the cable fixing pipe is not less than one third of the length of the cable fixing pipe, so that the cable is stably and reliably fixed.
(4) The gas sensors can be arranged into two gas sensors, one gas sensor can be used as a standby gas sensor of the other gas sensor, and the normal work of the equipment is not influenced when any one gas sensor is damaged.
(5) The invention is provided with a digital display, a buzzer and an alarm lamp, thereby being convenient for analyzing and processing the harmful gas data, displaying the harmful gas data and giving out sound and light alarm.
(6) The invention has complete functions, adopts the traditional circuit connection scheme between the basic components, has reliable performance, convenient maintenance and repair, is economic and reasonable, can meet the requirements of safe production and danger alarm in construction, and is danger alarm equipment essential for complete construction and production.
Drawings
FIG. 1 is a schematic structural view of a methane gas detection device inside a cable according to the present invention, in which a dotted line portion is a perspective region;
FIG. 2 is a schematic view showing a structure of a fixing hole formed of rubber in a cable fixing tube according to the present invention;
FIG. 3 is a schematic view of a portion of the methane gas detection apparatus within the cable of the present invention;
FIG. 4 is a schematic diagram of the internal circuit of the methane gas detection device inside the cable according to the present invention;
in the figure, the gas sensor 1, the gas sensor 2, the main circuit board 3, the display screen 4, the buzzer 5, the alarm lamp 6, the shell 7, the socket 8, the cable fixing tube 9, the fixing hole 10 and the rubber.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1 and 4, the present embodiment provides a device for detecting methane gas inside a cable, which is used for detecting methane gas inside the cable, and the device includes a gas sensor 1 having a methane detection function, a main circuit board 2, a display screen 3, and a casing 6 supporting the entire device, where the main circuit board 2 is connected to the gas sensor 1 and the display screen 3 respectively, the casing 6 is provided with a socket 7, an outer side of the socket 7 is connected to a cable fixing tube 8, the cable fixing tube 8 is of a tubular structure, rubber 10 is provided along a same cross section circumference of an inner surface, and a fixing hole 9 is formed, at least one fixing hole 9 is located at one end of the cable fixing tube 8 far away from the socket 7, and the cable is connected to the socket 7 through the fixing hole 9 and directly faces the gas. In this embodiment, the display screen 3 is an OLED display screen, and the socket 7 is used to fix the head of the cable.
As shown in fig. 1 and 3, the cable fixing tube 8 is detachably connected to the socket 7, and the detachable connection may be a snap connection, a magnetic attraction connection or a screw connection.
In this embodiment, the cable fixing tube 8 is connected with the socket 7 through threads, the outer side of the socket 7 is provided with external threads, the inner side of the cable fixing plate is provided with internal threads, and the external threads are matched with the internal threads.
As a preferred embodiment, the number of the fixing holes 9 is plural.
The sum of the widths of the rubbers 10 corresponding to all the fixing holes 9 in the cable fixing tube 8 is not less than one third of the length of the cable fixing tube 8, and the width of the rubbers 10 is the width of the rubbers 10 along the length direction of the cable fixing tube 8.
As a preferred embodiment, the fixing hole 9 has a flower shape, as shown in fig. 2.
The fixing hole 9 includes a circular through hole at the center and a plurality of petal-shaped through holes distributed around the circular through hole, and the outer circumferential diameter of the plurality of petal-shaped through holes is larger than the outer circumferential diameter of the cable.
In a preferred embodiment, the device for detecting methane gas in the cable further comprises a buzzer 4, and the buzzer 4 is connected with the main circuit board 2.
In a preferred embodiment, the device for detecting methane gas in the cable further comprises a warning lamp 5, and the warning lamp 5 is connected with the main circuit board 2.
In a preferred embodiment, the number of the gas sensors 1 is multiple, and each gas sensor 1 is connected to the main circuit board 2. In the present embodiment, two gas sensors 1 are provided, one gas sensor being damaged and the other gas sensor being on standby. Two gas sensors 1 are respectively installed on both sides of the lower part of the housing.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides an inside methane gas detection device of cable for detect the methane gas in the cable conductor, a serial communication port, the device is including gas sensor (1), main circuit board (2), display screen (3) and the casing (6) that supports whole device that have methane detection function, main circuit board (2) are connected respectively gas sensor (1) and display screen (3), casing (6) are equipped with socket (7), and the outside of this socket (7) is connected with cable fixing tube (8), and this cable fixing tube (8) are the tubular structure, are equipped with rubber (10) along the same cross section circumference of internal surface to be formed with fixed orifices (9), have at least one fixed orifices (9) are located cable fixing tube (8) are kept away from the one end of socket (7), the cable conductor passes through fixed orifices (9) access socket (7), and faces the gas sensor (1).
2. The device for detecting methane gas inside a cable according to claim 1, wherein the cable fixing tube (8) is detachably connected to the socket (7).
3. The device for detecting the methane gas in the cable according to claim 2, wherein the cable fixing tube (8) is connected with the socket (7) through a thread, an external thread is arranged on the outer side of the socket (7), an internal thread is arranged on the inner side of the cable fixing plate, and the external thread is matched with the internal thread.
4. The cable internal methane gas detecting device according to claim 1, wherein the number of the fixing holes (9) is plural.
5. The device for detecting methane gas inside a cable according to claim 4, wherein the sum of the widths of the rubbers (10) corresponding to all the fixing holes (9) in the cable fixing tube (8) is not less than one third of the length of the cable fixing tube (8), and the width of the rubbers (10) is the width of the rubbers (10) along the length direction of the cable fixing tube (8).
6. The device for detecting methane gas inside a cable according to claim 1, wherein the fixing hole (9) is flower-shaped.
7. The device for detecting methane gas inside a cable according to claim 6, wherein the fixing hole (9) comprises a central circular through hole and a plurality of petal-shaped through holes distributed around the circular through hole, and the outer circumferential diameters of the petal-shaped through holes are larger than the outer circumferential diameter of the cable.
8. The cable internal methane gas detecting device according to claim 1, further comprising a buzzer (4), wherein the buzzer (4) is connected to the main circuit board (2).
9. The cable internal methane gas detecting device according to claim 1, further comprising a warning lamp (5), wherein the warning lamp (5) is connected to the main circuit board (2).
10. The cable internal methane gas detecting device according to claim 1, wherein the number of the gas sensors (1) is plural, and each gas sensor (1) is connected to the main circuit board (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281356.9A CN112285297A (en) | 2020-11-16 | 2020-11-16 | Cable internal methane gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281356.9A CN112285297A (en) | 2020-11-16 | 2020-11-16 | Cable internal methane gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112285297A true CN112285297A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011281356.9A Pending CN112285297A (en) | 2020-11-16 | 2020-11-16 | Cable internal methane gas detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112285297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436569A (en) * | 2022-08-24 | 2022-12-06 | 巢湖学院 | Humidity sensor module of henhouse and using method thereof |
-
2020
- 2020-11-16 CN CN202011281356.9A patent/CN112285297A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436569A (en) * | 2022-08-24 | 2022-12-06 | 巢湖学院 | Humidity sensor module of henhouse and using method thereof |
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