CN117554296A - Buried methane detector - Google Patents
Buried methane detector Download PDFInfo
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- CN117554296A CN117554296A CN202311543426.7A CN202311543426A CN117554296A CN 117554296 A CN117554296 A CN 117554296A CN 202311543426 A CN202311543426 A CN 202311543426A CN 117554296 A CN117554296 A CN 117554296A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000007654 immersion Methods 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 239000003673 groundwater Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 1
- 238000007514 turning Methods 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to detection equipment, in particular to a buried methane detector, which comprises a first shell, a central processing unit, a laser receiving and transmitting assembly, a laser reflecting device, a first driving assembly and a water immersion sensor, wherein the central processing unit, the laser receiving and transmitting assembly, the laser reflecting device, the first driving assembly and the water immersion sensor are arranged on the outer wall of the first shell, the laser reflecting device is connected with the first driving assembly, an inner cavity of the first shell is divided into a detection cavity and a protection cavity by the laser reflecting device, the first driving assembly can drive the laser reflecting device to rotate, a first through hole is formed in a position, corresponding to the detection cavity, of the side wall of the first shell, other parts of the first shell are sealed, and the laser receiving and transmitting assembly, the first driving assembly and the water immersion sensor are all connected with the central processing unit. The invention can prevent the damage of the laser reflecting device caused by the immersion of the ground water and avoid the pollution of the reflecting surface of the laser reflecting device.
Description
Technical Field
The invention relates to detection equipment, in particular to a buried methane detector.
Background
The buried methane detector is gas detection equipment based on TDLAS technology, and is mainly used for detecting whether methane of a buried natural gas pipeline below a pavement leaks or not. The detection principle of the buried methane detector is that a laser transmitter transmits laser beams to a reflecting mirror, the reflecting mirror reflects the laser beams, and a laser receiver receives the laser beams, when methane gas exists in a laser path, the intensity of the signals received by the laser receiver can be attenuated, and the laser attenuation is more serious as the concentration of the methane gas is larger.
In the use of the buried methane detector, if water is soaked into the area of the detection pipeline on the ground, the reading of the buried methane detector is abnormal, and after the water is removed, the reflection mirror surface can remain dirt, and the abnormal detection result data of the buried methane detector can cause the phenomenon of false alarm information. For this reason, a methane detector that can avoid moisture interference is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing the buried methane detector which can prevent the laser reflection device from being damaged due to the immersion of ground water and prevent inaccurate measurement results due to the pollution of the reflection surface of the laser reflection device.
In order to achieve the above purpose, the invention provides a buried methane detector, which comprises a first shell, a central processing unit, a laser receiving and transmitting assembly, a laser reflecting device, a first driving assembly and a water sensor, wherein the central processing unit, the laser receiving and transmitting assembly, the laser reflecting device, the first driving assembly and the water sensor are arranged in the first shell, the water sensor is arranged on the outer wall of the first shell, the laser receiving and transmitting assembly is used for transmitting laser to the laser reflecting device and receiving the laser reflected by the laser reflecting device, the laser reflecting device is provided with a reflecting surface, the laser reflecting device is connected with the first driving assembly, the laser reflecting device divides the inner cavity of the first shell into a detecting cavity and a protecting cavity, the first driving assembly can drive the laser reflecting device to rotate so that the reflecting surface of the laser reflecting device faces the laser receiving and transmitting assembly or faces the protecting cavity, the laser receiving and transmitting assembly is arranged in the detecting cavity, the position on the side wall of the first shell, corresponding to the detecting cavity, other parts of the first shell are sealed, the laser receiving and transmitting assembly, the first driving assembly, the water sensor and the water sensor are connected with the central processing unit, and the water sensor is driven by the water sensor to transmit water sensor to the central processing unit when the water sensor reaches the water sensor, and the water sensor is controlled to turn.
The invention discloses a buried methane detector, which further comprises an opening and closing device, wherein the opening and closing device comprises a second shell and a second driving assembly, the second driving assembly is connected with a central processing unit, the central processing unit controls the second driving assembly to drive the second shell to rotate or stop rotating, the first shell is cylindrical, a plurality of first through holes are uniformly distributed along the circumferential direction of the first shell, each first through hole extends along the length direction of the first shell, the opening and closing device comprises a second shell, a second through hole is arranged on the second shell, the second through holes correspond to the first through holes, the distance between two adjacent second through holes is larger than or equal to the width of the first through holes, the second shell is arranged in a detection cavity and is in contact with the first shell, and the second shell rotates relative to the first shell to enable the first through holes to be opened or closed.
The invention discloses a buried methane detector, wherein the second driving assembly comprises a second motor and an internal gear, the internal gear is arranged at the driving end of the second motor, a gear ring is arranged at one end of a second shell, the internal gear is matched with the gear ring, and the second motor is connected with a central processing unit.
The invention relates to a buried methane detector, wherein the laser reflecting device is a reflecting mirror.
The invention discloses a buried methane detector, wherein a first rotating shaft and a second rotating shaft are respectively arranged on two sides of a laser reflecting device, a first installation boss and a second installation boss are arranged on the inner wall of a first shell, the first rotating shaft is arranged on the first installation boss, the first rotating shaft can rotate relative to the first installation boss, the second rotating shaft is arranged on the second installation boss, the second rotating shaft can rotate relative to the second installation boss, a first driving component is arranged in a protection cavity, the first driving component comprises a first driving motor, a first driving wheel, a first driven wheel and a synchronous belt, the first driving wheel is arranged on the driving end of the first driving motor, the first driven wheel is connected to the second rotating shaft, the synchronous belt is connected between the first driving wheel and the first driven wheel, and the laser reflecting device is mutually attached to the first installation boss, the second installation boss and the inner wall of the first shell.
The invention discloses a buried methane detector, wherein a sealing strip is arranged between a laser reflecting device and the inner wall of a first shell.
The invention discloses a buried methane detector, wherein a groove is formed in the annular side of a laser reflecting device, and a sealing strip is arranged in the groove.
The invention discloses a buried methane detector, wherein a first shell comprises a first barrel, a second barrel and a third barrel which are sequentially connected, the first barrel is connected with the second barrel, the second barrel is detachably connected with the third barrel, and a first through hole is formed in the second barrel.
The invention discloses a buried methane detector, which further comprises a reflecting surface cleaning device, wherein the reflecting surface cleaning device comprises a bracket, a mirror surface cleaning piece and a third driving assembly, the mirror surface cleaning piece is connected to the bracket, the bracket is connected to the third driving assembly, and the third driving assembly can drive the mirror surface cleaning piece to move up and down through the bracket so as to clean the reflecting surface of the laser reflecting device.
The invention discloses a buried methane detector, wherein a third driving assembly is an electric telescopic cylinder, the driving end of the electric telescopic cylinder is connected with a bracket, the electric telescopic cylinder is connected with a central processing unit, a mounting hole is formed in a position, close to a laser reflecting device, of a first shell, a mounting cylinder is detachably connected to a position, corresponding to the mounting hole, of the outer wall of the first shell, the electric telescopic cylinder is arranged in the mounting cylinder, and when the electric telescopic cylinder stretches out, the bracket is driven to penetrate through the mounting hole and enter a detection cavity.
Compared with the prior art, the buried methane detector has at least the following beneficial effects:
according to the buried methane detector, the water immersion sensor and the laser reflecting device are arranged on the outer wall of the first shell to divide the inner cavity of the first shell into the detection cavity and the protection cavity, the first driving component can drive the laser reflecting device to rotate to enable the reflecting surface of the laser reflecting device to face the laser receiving and transmitting component or face the protection cavity, and the water immersion sensor, the laser receiving and transmitting component and the first driving component are all connected with the central processing unit, so that when the water immersion sensor detects water leakage in a detection environment, the first driving component can drive the laser reflecting device to overturn to enable the reflecting surface of the laser reflecting device to be in the closed protection cavity, and liquid with soil is prevented from being adhered to the reflecting surface of the laser reflecting device after penetrating into the detection cavity through the first through hole, so that the laser reflecting device is damaged, the influence on methane concentration detection is reduced, meanwhile, the laser receiving and transmitting component is controlled to stop working, and false alarm caused by inaccurate detection results is prevented.
The buried methane detector of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a buried methane detector according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the first housing of the buried methane detector of the present invention;
FIG. 4 is a schematic diagram showing a connection structure between a driving device and a laser reflection device in the buried methane detector according to the present invention;
FIG. 5 is a schematic view of another internal structure of the buried methane detector of the present invention;
FIG. 6 is a schematic diagram showing the connection structure of the bracket and the mirror cleaning member in the buried methane detector according to the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, the buried methane detector of the invention comprises a first shell 1, a central processing unit arranged in the first shell 1, a laser receiving and transmitting component 2, a laser reflecting device 3, a first driving component 6 and a water immersion sensor 8 arranged on the outer wall of the first shell 1, wherein the laser receiving and transmitting component 2 comprises a laser transmitter and a laser receiver which are arranged side by side and are used for transmitting laser to the laser reflecting device 3 and receiving the laser reflected by the laser reflecting device 3, the laser reflecting device 3 is provided with a reflecting surface, the laser reflecting device 3 is connected with the first driving component 6, the laser reflecting device 3 divides the inner cavity of the first shell 1 into a detecting cavity 4 and a protecting cavity 5, the first driving component 6 can drive the laser reflecting device 3 to rotate so that the reflecting surface of the laser reflecting device 3 faces the laser receiving and transmitting component 2 or faces the protecting cavity 5, the laser receiving and transmitting component 2 is positioned in the detection cavity 4, a first through hole 11 is arranged on the side wall of the first shell 1 and corresponds to the detection cavity 4, other parts of the first shell 1 are closed, the laser receiving and transmitting component 2, the first driving component 6 and the water immersion sensor 8 are all connected with a central processing unit, the central processing unit is communicated with an external control center main processing unit through wireless radio frequency communication equipment, a water preset value for enabling the laser reflection device 3 to reflect laser to work normally, a water exceeding preset value for stopping working and turning to the protection cavity 5 and a methane concentration alarm value are preset in the central processing unit, the water immersion sensor 8 transmits detected water immersion signals to the central processing unit, when the water value transmitted by the water immersion sensor 8 reaches the water exceeding preset value preset by the central processing unit, the central processing unit controls the first driving component 6 to drive the laser reflection device 3 to turn over, and the laser receiving and transmitting assembly 2 is controlled to stop working, and when the water content value transmitted by the water immersion sensor 8 reaches the water content value of normal working, the central processing unit controls the first driving assembly 6 to drive the laser reflecting device 3 to turn over and reset.
When the buried methane detector works, the laser receiving and transmitting assembly 2 is started, the central processing unit controls the laser receiving and transmitting assembly 2 to emit constant laser beams, the laser reflecting device 3 reflects the laser beams to the laser receiving and transmitting assembly 2, the laser receiving and transmitting assembly 2 detects the laser beams and transmits laser beam signals to the central processing unit, when no methane exists in the detection environment, the output signals received by the laser receiving and transmitting assembly 2 and transmitted to the central processing unit are constant, when methane leaks in the detection environment, the methane enters the detection cavity 4 through the first through hole 11, and the laser receiving and transmitting assembly 2 receives and transmits the methaneThe output signal delivered to the central processor decreases, in the central processor according to lambert-beer absorption law i=i 0 Exp (- μcl), the methane concentration c=l can be obtained by calculation n (I 0 I/μl, wherein I is the signal intensity of the laser beam emitted from the laser transceiver module 2, I 0 For the laser beam signal intensity that laser receiving and dispatching subassembly 2 received, mu is gas absorption coefficient, L is the optical path of air chamber, and C is the gas concentration that awaits measuring, and wherein gas absorption coefficient and optical path are constants, when concentration surpasses the alarm numerical value of predetermineeing, central processing unit sends alarm signal.
According to the buried methane detector, the water immersion sensor 8 and the laser reflecting device 3 are arranged on the outer wall of the first shell 1 to divide the inner cavity of the first shell 1 into the detection cavity 4 and the protection cavity 5, the first driving component 6 can drive the laser reflecting device 3 to rotate to enable the reflecting surface of the laser reflecting device 3 to face the laser receiving and transmitting component 2 or face the protection cavity 5, and the water immersion sensor 8, the laser receiving and transmitting component 2 and the first driving component 6 are all connected with the central processing unit, so that when the water immersion sensor 8 detects water leakage in a detection environment, the first driving component 6 can drive the laser reflecting device 3 to overturn to enable the reflecting surface of the laser reflecting device 3 to be located in the closed protection cavity 5, so that the liquid with soil is prevented from being attached to the reflecting surface of the laser reflecting device 3 after penetrating into the detection cavity 4 through the first through hole 11, the influence on concentration detection is reduced, and meanwhile, the laser receiving and transmitting component 2 is controlled to stop working, and false alarm caused by inaccurate detection results is prevented.
Optionally, as shown in fig. 1 and 5, the buried methane detector further includes an opening and closing device 9, where the opening and closing device 9 includes a second casing 91 and a second driving component 96, the second driving component 96 is connected to a central processor, the central processor controls the second driving component 96 to drive the second casing 91 to rotate or stop rotating, the first casing 1 is cylindrical, the first through holes 11 are provided with a plurality of first through holes 11 uniformly distributed along the circumferential direction of the first casing 1, each first through hole 11 extends along the length direction of the first casing 1, the second casing 91 is provided with a second through hole 92, the second through hole 92 corresponds to the first through hole 11, the distance between two adjacent second through holes 92 is greater than or equal to the width of the first through hole 11, the second casing 91 is disposed in the detection cavity 4 and is attached to the first casing 1, the second casing 91 can rotate relative to the first casing 1 to enable the first through hole 11 to be opened or closed, and the first through hole 11 is provided with a filter screen to prevent sediment from entering the detection cavity 4. When the water value transmitted by the water immersion sensor 8 reaches the water value preset by the central processing unit and exceeds the standard preset value, the first through hole 11 needs to be closed, the second driving assembly 96 is controlled by the central processing unit to drive the second shell 91 to rotate, when the first through hole 11 and the second through hole 92 are completely staggered, the first through hole 11 is closed, and when the water value transmitted by the water immersion sensor 8 reaches the water value of normal work and the first through hole 11 needs to be opened, the first through hole 11 and the second through hole 92 are overlapped, and the laser reflection device 3 is further prevented from being polluted by setting the opening and closing device 9.
Optionally, the second driving assembly 96 includes a second motor 93 and an internal gear 94, the internal gear 94 is disposed at a driving end of the second motor 93, a gear ring 95 is disposed at one end of the second housing 91, the internal gear 94 is matched with the gear ring 95, and the second motor 93 is connected to the central processor. The second motor 93 drives the second housing 91 to rotate through gear rotation, and has simple structure, reliable operation and long service life.
Alternatively, as shown in fig. 1, 4 and 5, the laser reflection device 3 is a mirror, two sides of the laser reflection device 3 are respectively provided with a first rotating shaft 31 and a second rotating shaft 32, the inner wall of the first housing 1 is provided with a first installation boss 12 and a second installation boss 13, the first installation boss 12 and the second installation boss 13 are oppositely arranged, the first rotating shaft 31 is arranged on the first installation boss 12, the first rotating shaft 31 can rotate relative to the first installation boss 12, the second rotating shaft 32 is arranged on the second installation boss 13, the second rotating shaft 32 can rotate relative to the second installation boss 13, the first driving component 6 is arranged in the protection cavity 5, the first driving component 6 comprises a first driving motor 61, a first driving wheel 62, a first driven wheel 63 and a synchronous belt 64, the first driving wheel 62 is arranged at the driving end of the first driving motor 61, the first driven wheel 63 is connected to the second rotating shaft 32, the synchronous belt 64 is connected between the first driving wheel 62 and the first driven wheel 63, and the laser reflection device 3 is mutually attached to the first installation boss 12, the second installation boss 13 and the inner wall of the first housing 1. Specifically, the first driving motor 61, the first driving wheel 62, the first driven wheel 63, and the timing belt 64 are all disposed in the protection cavity 5. The first driving motor 61 drives the second rotating shaft 32 to rotate so as to drive the laser reflecting device 3 and the first rotating shaft 31 to rotate, so that the laser reflecting device 3 is turned over, the influence on the fit between the laser reflecting device 3 and the first mounting boss 12, the second mounting boss 13 and the first shell 1 due to the arrangement of the first driving component 6 is reduced, and then methane gas is prevented from leaking from the detection cavity 4 to the protection cavity 5, meanwhile, the first driving component 6 is driven by the synchronous belt 64, the driving is accurate and stable, the constant transmission ratio is realized, the phenomenon of falling of the driving is not easy to occur, and the buffering and vibration reducing capabilities are realized.
Optionally, a sealing strip 14 is arranged between the laser reflection device 3 and the inner wall of the first shell 1, so that methane gas is further prevented from leaking from the detection cavity 4 to the protection cavity 5.
Optionally, the laser reflection device 3 is provided with a groove on the ring side, and the sealing strip 14 is arranged in the groove. Specifically, the sealing strip 14 is adhered in the groove through glue, so that the machining precision requirements on the laser reflecting device 3 and the first shell 1 are reduced, and the machining cost is reduced.
Optionally, the first casing 1 includes a first cylinder 15, a second cylinder 16, and a third cylinder 17 that are sequentially connected, between the first cylinder 15 and the second cylinder 16, between the second cylinder 16 and the third cylinder 17, all can be detachably connected, and the first through hole 11 is disposed on the second cylinder 16. Specifically, the first cylinder 15 and the second cylinder 16 are connected through threads, and the second cylinder 16 and the third cylinder 17 can be welded with each other after the internal parts are installed, so that the production and the processing are facilitated.
Optionally, as shown in fig. 5 and 6, the laser reflection device further includes a reflection surface cleaning device, where the reflection surface cleaning device includes a bracket 33, a mirror surface cleaning member 34, and a third driving assembly 35, where the mirror surface cleaning member 34 is connected to the bracket 33, the bracket 33 is connected to the third driving assembly 35, and the third driving assembly 35 can drive the mirror surface cleaning member 34 to move up and down through the bracket 33 so that the mirror surface cleaning member 34 cleans water mist, dust and other stains on the reflection surface of the laser reflection device 3. Because the gas circulation between the detection cavity 4 and the protection cavity 5 is limited, the driving motor in the protection cavity 5 heats, so that a temperature difference exists between the detection cavity 4 and the protection cavity 5, when the laser reflection device 3 turns the reflection surface to turn into the detection cavity 4 from the protection cavity 5, water mist appears on the reflection surface, the water mist, dust and dirt are removed through the reflection surface cleaning device, and the probability of error of the buried methane detector is further reduced.
Optionally, the third driving component 35 is an electric telescopic cylinder, the driving end of the electric telescopic cylinder is connected with the support 33, the electric telescopic cylinder is connected with the central processing unit, a mounting hole is formed in the position, close to the laser reflecting device 3, of the first shell 1, a mounting cylinder 36 is connected to the position, corresponding to the mounting hole, of the outer wall of the first shell 1, the electric telescopic cylinder is arranged in the mounting cylinder 36, the electric telescopic cylinder drives the support 33 to penetrate through the mounting hole to enter the detection cavity 4 when extending, at the moment, the mirror cleaning piece 34 abuts against the reflecting surface of the laser reflecting device 3, and the electric telescopic cylinder drives the support 33 to stretch until the reflecting surface is cleaned. When the water value transmitted to the central processing unit by the water sensor 8 reaches the water value of normal operation, the laser reflecting device 3 turns over the reflecting surface and enters the detection cavity 4 to face the laser receiving and transmitting assembly 2, before the laser receiving and transmitting assembly 2 starts to operate, the central processing unit controls the electric telescopic cylinder to operate and drive the mirror cleaning piece 34 to move up and down to clean the reflecting surface, and after the central processing unit controls the electric telescopic cylinder to complete a stroke, the central processing unit controls the buried detector to operate normally. Specifically, the mirror cleaning member 34 is adhered to the bracket 33 or screwed thereto, and the mounting cylinder 36 is screwed to the first housing 1.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a buried methane detector, its characterized in that includes first casing (1), set up in central processing unit, laser receiving and dispatching subassembly (2), laser reflection device (3), first drive assembly (6) and set up in water logging sensor (8) on the outer wall of first casing (1), laser receiving and dispatching subassembly (2) are used for to laser reflection device (3) transmitting laser and receiving laser that laser reflection device (3) reflected back, laser reflection device (3) have the reflecting surface, laser reflection device (3) with first drive assembly (6) are connected, laser reflection device (3) will first casing (1) inner chamber is separated into detection chamber (4), protection chamber (5), first drive assembly (6) can drive laser reflection device (3) rotate make laser reflection device's (3) reflecting surface orientation laser receiving and dispatching subassembly (2) or orientation protection chamber (5), detection device (3) with first drive assembly (4) are located detection chamber (4), detection chamber (4) are located first drive assembly (4), the corresponding position of sealing up of first casing (1), the first lateral wall (4) is provided with other parts, sealing up the first lateral wall (4) is moved to the first lateral wall (1) The water immersion sensor (8) is connected with the central processing unit, the water immersion sensor (8) transmits detected water immersion signals to the central processing unit, and when the water immersion value transmitted by the water immersion sensor (8) reaches a preset value of the central processing unit, the central processing unit controls the first driving component (6) to drive the laser reflecting device (3) to overturn and controls the laser receiving and transmitting component (2) to stop working.
2. The buried methane detector according to claim 1, further comprising an opening and closing device (9), wherein the opening and closing device (9) comprises a second housing (91) and a second driving assembly (96), the second driving assembly (96) is connected with the central processing unit, the central processing unit controls the second driving assembly (96) to drive the second housing (91) to rotate or stop rotating, the first housing (1) is cylindrical, the first through holes (11) are provided with a plurality of first through holes (11) uniformly distributed along the circumferential direction of the first housing (1), each first through hole (11) extends along the length direction of the first housing (1), the opening and closing device (9) comprises a second housing (91), the second housing (91) is provided with a second through hole (92), the second through hole (92) corresponds to the first through hole (11), the distance between two adjacent second through holes (92) is larger than or equal to the width of the first through hole (11), and the first housing (91) is arranged in the first housing (1) to be closed or closed by the second housing (91).
3. The buried methane detector according to claim 2, wherein the second driving assembly (96) comprises a second motor (93) and an internal gear (94), the internal gear (94) is disposed at the driving end of the second motor (93), a gear ring (95) is disposed at one end of the second housing (91), the internal gear (94) is matched with the gear ring (95), and the second motor (93) is connected to the central processor.
4. Buried methane detector according to claim 1, characterized in that the laser reflection means (3) are mirrors.
5. The buried methane detector according to claim 4, wherein a first rotating shaft (31) and a second rotating shaft (32) are respectively arranged at two sides of the laser reflection device (3), a first mounting boss (12) and a second mounting boss (13) are arranged on the inner wall of the first housing (1), the first rotating shaft (31) is arranged on the first mounting boss (12), the first rotating shaft (31) can rotate relative to the first mounting boss (12), the second rotating shaft (32) is arranged on the second mounting boss (13), the second rotating shaft (32) can rotate relative to the second mounting boss (13), the first driving assembly (6) is arranged in the protection cavity (5), the first driving assembly (6) comprises a first driving motor (61), a first driving wheel (62), a first driven wheel (63) and a synchronous belt (64), the first driving wheel (62) is arranged on the driving end of the first driving motor (61), the first rotating shaft (63) is connected with the first driven wheel (63) and the first driven wheel (64) is connected with the first driving wheel (63) and the first driving wheel (64) in a synchronous way, and the first driving wheel (63) is connected with the first driving wheel (63) and the laser reflection device (12) is arranged on the second driving assembly (3) The second installation bosses (13) are mutually attached to the inner wall of the first shell (1).
6. Buried methane detector according to claim 5, characterized in that a sealing strip (14) is arranged between the laser reflection means (3) and the inner wall of the first housing (1).
7. The buried methane detector according to claim 6, characterized in that the laser reflection means (3) is provided with a groove on the annular side, and the sealing strip (14) is arranged in the groove.
8. The buried methane detector according to claim 1, wherein the first housing (1) comprises a first cylinder (15), a second cylinder (16) and a third cylinder (17) which are sequentially connected, wherein the first cylinder (15) and the second cylinder (16) are detachably connected, the second cylinder (16) and the third cylinder (17) are detachably connected, and the first through hole (11) is formed in the second cylinder (16).
9. The buried methane detector according to claim 1, further comprising a reflective surface cleaning device, wherein the reflective surface cleaning device comprises a bracket (33), a mirror cleaning member (34) and a third driving assembly (35), the mirror cleaning member (34) is connected to the bracket (33), the bracket (33) is connected to the third driving assembly (35), and the third driving assembly (35) can drive the mirror cleaning member (34) to move up and down through the bracket (33) to clean the reflective surface of the laser reflecting device (3).
10. The buried methane detector according to claim 9, wherein the third driving component (35) is an electric telescopic cylinder, the driving end of the electric telescopic cylinder is connected with the bracket (33), the electric telescopic cylinder is connected with the central processing unit, a mounting hole is formed in the position, close to the laser reflecting device (3), of the first shell (1), a mounting cylinder (36) is detachably connected to the position, corresponding to the mounting hole, of the outer wall of the first shell (1), the electric telescopic cylinder is arranged in the mounting cylinder (36), and when the electric telescopic cylinder stretches out, the bracket (33) is driven to pass through the mounting hole to enter the detection cavity (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311543426.7A CN117554296A (en) | 2023-11-20 | 2023-11-20 | Buried methane detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311543426.7A CN117554296A (en) | 2023-11-20 | 2023-11-20 | Buried methane detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117554296A true CN117554296A (en) | 2024-02-13 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367478A (en) * | 2017-07-19 | 2017-11-21 | 常州合众电气有限公司 | Non-dispersive infrared optical sulfur hexafluoride gas concentration sensor |
| US20190346366A1 (en) * | 2018-05-11 | 2019-11-14 | Yokogawa Electric Corporation | Laser gas analyzer |
| CN218067651U (en) * | 2022-07-29 | 2022-12-16 | 海纳云物联科技有限公司 | Laser combustible gas monitoring device |
| CN218512391U (en) * | 2022-08-16 | 2023-02-21 | 辽宁北方化学工业有限公司 | Trace ethylene oxide detection device |
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2023
- 2023-11-20 CN CN202311543426.7A patent/CN117554296A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107367478A (en) * | 2017-07-19 | 2017-11-21 | 常州合众电气有限公司 | Non-dispersive infrared optical sulfur hexafluoride gas concentration sensor |
| US20190346366A1 (en) * | 2018-05-11 | 2019-11-14 | Yokogawa Electric Corporation | Laser gas analyzer |
| CN218067651U (en) * | 2022-07-29 | 2022-12-16 | 海纳云物联科技有限公司 | Laser combustible gas monitoring device |
| CN218512391U (en) * | 2022-08-16 | 2023-02-21 | 辽宁北方化学工业有限公司 | Trace ethylene oxide detection device |
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