Combustible gas detection equipment with laser methane alarm and combustible gas detection method

Abstract

The invention discloses combustible gas detection equipment with a laser methane alarm and a combustible gas detection method, and relates to the technical field of combustible gas detection of the laser methane alarm, the combustible gas detection equipment comprises a bottom plate, a transverse rotating part, a fixed screw hole, an inclination angle part and a fixed part, the laser methane alarm can be automatically adjusted at multiple angles through the transverse rotating part and the inclined angle part, and the situation that a laser probe of the laser methane alarm at a fixed angle can only detect gas on a direct laser beam path and cannot cover other directions in the surrounding environment is avoided; the laser methane alarm device has the advantages that the laser methane alarm device is simple in structure and convenient to operate, missing detection is caused, large-area multi-angle detection cannot be performed, fast sampling of methane combustible gas detection is facilitated, the detection efficiency of the laser methane alarm device is improved, and the laser methane alarm device is convenient to fix and dismount by matching with a fixing part.

Description

Technical Field

[0001] The present invention relates to the technical field of combustible gas detection of laser methane alarms, in particular to combustible gas detection equipment and a method with a laser methane alarm. Background Art

[0002] Laser methane alarms are based on the selective absorption characteristics of methane molecules for lasers of specific wavelengths. When the laser beam emitted by the laser probe of the laser methane alarm passes through methane gas, the methane molecules absorb the light energy of the corresponding wavelength, undergoing energy level transitions, resulting in light intensity attenuation. By measuring the change in light intensity, the methane concentration can be quantitatively calculated. However, in use, it has been found that most laser methane alarms cannot be automatically adjusted at multiple angles. To avoid this, the laser probe of a fixed-angle laser methane alarm can only detect methane combustible gas in the direct path of the laser beam and cannot cover other directions in the surrounding environment, resulting in missed detections and the inability to conduct large-area multi-angle detection. It is also not conducive to accelerated sampling for quick methane combustible gas detection, thus reducing the detection efficiency of the laser methane alarm.

[0003] For example, the prior art application number CN117805026B provides a combustible gas detection device with a laser methane alarm, which includes a laser methane alarm, and also includes a fixed frame, on which a linear slide and an arc-shaped slide connected to the middle of the linear slide are provided; a drive block, on which a first slide bar and a second slide bar are fixed; an L-shaped mounting plate, which is fixedly connected to the first slide bar and the second slide bar; a protective mechanism, which is arranged on the L-shaped mounting plate; a drive motor, which is fixedly mounted on a base plate; a first connecting rod, one end of which is fixedly connected to the output shaft of the drive motor; a second connecting rod, one end of which is hinged to the first connecting rod, and the other end is hinged to the drive block. According to the periodic distribution of the pause state and the working state of the laser detection probe, when the laser detection probe is in the pause state, the laser detection probe is protected to prevent the laser detection probe from being exposed to the external environment for a long time and being contaminated by dust and dirt, thereby affecting its normal detection of combustible gas;

[0004] Through actual usage, it is known that the above-mentioned existing technology mainly realizes the function of protecting and cleaning the laser detection probe; but it is found during use that it is unable to automatically adjust the laser methane alarm at multiple angles, and the laser probe of the fixed-angle laser methane alarm can only detect the gas in the direct path of the laser beam, and cannot cover other directions in the surrounding environment, resulting in missed detection and inability to conduct multi-angle detection over a large area, and is not conducive to accelerated sampling for quick methane combustible gas detection, thereby reducing the detection efficiency of the laser methane alarm. For this reason, we have improved the above-mentioned existing technology based on actual usage. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the invention.

[0006] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A combustible gas detection device with a laser methane alarm includes a base plate, a transverse rotating member, a fixing screw hole, an inclined angle member and a fixing member;

[0009] A transverse rotating member is provided on the outer side wall of the top of the bottom plate;

[0010] The bottom plate is adjacent to the top outer side walls on both sides of the horizontal rotating member and is provided with a plurality of fixing screw holes of the same structure;

[0011] An inclined angle piece is provided on the top outer side wall of the transverse rotating piece, and a fixing piece is provided on the top outer side wall of the inclined angle piece.

[0012] Further: the transverse rotating member includes a first mounting shell arranged on the outer side wall of the top of the base plate, a first support plate is provided on the side wall of the inner cavity of the first mounting shell, a first motor is installed on the side wall of the first support plate, one end of the first motor actuator end is rotatably connected to the partition side wall of the inner cavity of the first mounting shell, and a first worm is provided at one end of the first motor actuator end, the other end of the first worm is rotatably connected to the other side wall of the inner cavity of the first mounting shell, and a matching worm gear is engaged with one side of the first worm gear, a rotating round rod is embedded in the middle of the worm gear, both ends of the rotating round rod are rotatably connected to the top and bottom side walls of the mounting shell, and the top end of the rotating round rod extends to the outer side wall of the top of the mounting shell.

[0013] The gear train is connected to the gear of the said first gear and the gear train is connected with the gear of the said first gear to the said second gear train, and the gear train is connected with the gear of the said first gear to the said second gear train.

[0014] Further: the fixing part includes a horizontal plate arranged on the outer side wall of the top of the semi-arc rotating wheel, a slider is arranged on the side wall of one side of the horizontal plate, and a screw is arranged on the side wall of the other side of the horizontal plate, the screw and the outer side wall of one end of the top of the slider are both slidably connected with a pressure plate, and the outer side wall of the top of the horizontal plate is provided with a laser methane alarm body, and the outer side wall of one end of the top of the screw is threadedly connected with a matching abutment cap, and the side wall of one end of the horizontal plate is embedded with an accelerated sampling part.

[0015] Further: the accelerated sampling component includes a sleeve embedded in the side wall of one end of the horizontal plate, a connecting air pipe is provided at the bottom end of the sleeve, an air pump is installed at the top end of the connecting air pipe, and a flow guide cover is provided at the bottom end of the connecting air pipe.

[0016] Further: the sleeve includes a filter bracket nested at one end of the top, a polypropylene filter is provided on the side wall of the middle inner cavity of the filter bracket, and a fixing screw is threadedly connected to the side wall of one side of the filter bracket, and the bottom end of the fixing screw is threadedly connected to the side wall of one end of the top of the sleeve and a matching thread groove inner wall is opened.

[0017] Furthermore: the semi-arc rotating wheel includes an outer side wall provided with worm gear teeth that mesh with the second worm.

[0018] Furthermore: the second mounting shell includes a camera arranged on a bottom side wall of one side.

[0019] Furthermore: the pressing plate includes a circular movable hole adjacent to the other side of the screw, and the embedded side wall of the circular movable hole is arranged on the outer side wall of one end of the top of the screw.

[0020] A detection method for a combustible gas detection device with a laser methane alarm, the method comprising the following steps:

[0021] Step 1: At the beginning of the work, the operator manually places the laser methane alarm body into the outer wall of the top of the horizontal plate, and then manually moves the pressure plate up and down through the circular movable hole on the outer wall of the screw and the top end of the slider at the same time to adjust the pressure plate to abut against the top side wall of the laser methane alarm body, and a rubber friction pad is provided on the outer wall of the bottom of the pressure plate to increase a certain abutting friction force, and then manually rotates the outer wall of the top end of the screw to be threaded with a matching abutting cap to abut and fix the outer wall of the top of the pressure plate, completing the fixation of the laser methane alarm body, which is convenient for convenient fixation and disassembly of the laser methane alarm. The operator then uses multiple fixing screw holes of the same structure with screws to install the entire device at a suitable methane combustible gas detection position;

[0022] Step 2: When performing multi-angle detection on a large area in different other directions, the second mounting shell is provided with a prior art camera provided on the bottom side wall on one side to capture image information of the leakage area from different viewing angles and send image position information, so as to know the detection angle position of the laser probe of the laser methane alarm body and avoid leakage areas, and then the image information is captured and the image position information is sent through the prior art camera. The corresponding generated electrical signal is sent to the PLC controller, and the PLC controller then transmits the electrical signal and triggers the first motor to drive the execution end. A first worm is provided at one end of the execution end, which is connected to the partition side wall of the inner cavity of the first mounting shell and the other end of the first worm is connected to the other side wall of the inner cavity of the first mounting shell for support and rotation. The rotation of the first worm drives a worm gear engaged with a matching worm gear on one side to rotate, and the worm gear drives a rotating round rod embedded in the middle, which is connected to the top and bottom side walls of the mounting shell for support and rotation through both ends of the rotating round rod, driving the tilt angle part to adjust the lateral angle;

[0023] Step three: further, the PLC controller transmits an electrical signal and triggers the second motor execution end to drive one end connected to the first gear, which is connected to the second mounting shell inner cavity partition side wall through the other end of the first gear for support and rotation. The rotation of the first gear drives the second gear meshed with a matching one side to rotate. The rotation of the second gear drives a rotating long round rod embedded in the middle position to be connected to the second mounting shell inner cavity partition side wall through one end of the rotating long round rod and the other end of the rotating long round rod for support and rotation. The rotation of the rotating long round rod drives the second worm embedded in the outer wall away from one end of the second mounting shell inner cavity partition side wall to rotate, and the rotation of the second worm drives the semi-arc on the top side. The shaped rotating wheel is provided with worm gear teeth that mesh with the second worm gear through the outer side wall, and the arc-shaped rotation tilt angle on both sides is adjusted under the forward and reverse rotation of the second motor, which simultaneously drives the laser methane alarm body fixed by the pressure plate and the cross plate and the accelerated sampling member to adjust the arc-shaped rotation tilt angle on both sides. Due to the self-locking characteristics of the second worm gear and the meshing matching worm gear teeth themselves, the stability of the adjustment of the tilt angle is improved. Through the above operation, it is convenient to automatically adjust the laser methane alarm at multiple angles, so as to avoid the laser probe of the fixed-angle laser methane alarm being able to detect only the gas in the direct path of the laser beam and unable to cover other directions in the surrounding environment, resulting in missed detection and inability to conduct multi-angle detection over a large area.

[0024] Step 4: During accelerated sampling, the PLC controller triggers the air pump installed at one end of the top of the air pipe to accelerate the extraction of external methane combustible gas through the deflector provided at the bottom end of the air pipe. The multi-angle adjustment mentioned above accelerates the accelerated flow of methane combustible gas in different areas, so that the extracted methane combustible gas is transported to the casing through the air pump. A filter bracket is nested at one end of the top of the casing, and a polypropylene filter is provided on the side wall of the inner cavity in the middle of the filter bracket to intercept solid particles in the air such as dust, hair, and oil particles, etc., while ensuring that methane gas can freely pass through the top of the polypropylene filter to reach the laser probe of the laser methane alarm body. Moreover, the polypropylene filter is chemically inert and does not react with methane, nor does it adsorb methane molecules. Through the filtering effect of the polypropylene filter, the gas does not contain methane combustible gas and other impurities that affect the detection accuracy of the laser methane alarm body. The side wall of one side of the filter bracket is threadedly connected with a fixed screw, which is manually rotated to disengage the bottom end of the fixed screw from the threaded connection to the side wall of the top end of the sleeve, which is provided with a matching threaded groove inner wall. The polypropylene filter is provided on the side wall of the middle inner cavity of the filter bracket for regular disassembly and replacement. The above sampling operation facilitates the rapid sampling of methane combustible gas detection, improves the detection efficiency of the laser methane alarm, and is easy to operate.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the present invention facilitates automatic multi-angle adjustment of the laser methane alarm through the horizontal rotating parts and the tilting angle parts, avoiding the situation where the laser probe of the fixed-angle laser methane alarm can only detect the gas in the direct path of the laser beam and cannot cover other directions in the surrounding environment, resulting in missed detection and inability to perform large-area multi-angle detection. It is also conducive to accelerating the sampling of methane combustible gas detection, improving the detection efficiency of the laser methane alarm, and is easy to operate. In combination with the fixing parts, the laser methane alarm can be easily fixed and disassembled.

[0026] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0027] The technical solution of the present application is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the present invention;

[0030] Figure 2 It is a schematic cross-sectional view of the structure of the present invention;

[0031] Figure 3 This is a schematic cross-sectional view of the structure of the lateral rotation member and the tilt angle member of the present invention;

[0032] Figure 4 This is a schematic cross-sectional view of the tilt angle member structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the fixing member and the accelerated sampling member of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the accelerated sampling component of the present invention.

[0035] In the figure: 1, bottom plate; 2, horizontal rotating member; 21, first mounting housing; 22, first support plate; 23, worm gear; 24, first worm; 25, first motor; 26, rotating rod; 3, fixing screw hole; 4, tilting angle member; 41, second mounting housing; 411, camera; 42, second support plate; 43, second motor; 44, first gear; 45, second gear; 46, rotating long rod; 47, second worm; 48 , semi-arc rotating wheel; 481, worm gear; 49, square movable groove; 5, fixing part; 51, horizontal plate; 52, slider; 53, screw; 54, pressure plate; 541, circular movable hole; 55, laser methane alarm body; 56, accelerated sampling part; 561, sleeve; 5611, filter bracket; 5612, polypropylene filter; 5613, fixing screw; 562, connecting air pipe; 563, air pump; 564, deflector cover. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0039] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] See also Figure 1-6 , the present invention provides a technical solution: a combustible gas detection device with a laser methane alarm, comprising a base plate 1, a lateral rotating member 2, a fixing screw hole 3, an inclined angle member 4 and a fixing member 5;

[0041] A transverse rotating member 2 is provided on the top outer side wall of the bottom plate 1;

[0042] The bottom plate 1 is provided with a plurality of fixing screw holes 3 of the same structure on the top outer side walls on both sides adjacent to the horizontal rotating member 2;

[0043] The top outer wall of the horizontal rotating part 2 is provided with an inclined angle part 4, and the top outer wall of the inclined angle part 4 is provided with a fixing part 5. The horizontal rotating part 2 and the inclined angle part 4 are used to facilitate automatic multi-angle adjustment of the laser methane alarm, so as to avoid the laser probe of the fixed-angle laser methane alarm being able to only detect the gas on the direct path of the laser beam and unable to cover other directions in the surrounding environment, resulting in missed detection and inability to conduct large-area multi-angle detection. It is also conducive to accelerating the sampling of methane combustible gas detection, improving the detection efficiency of the laser methane alarm, and being easy to operate. In combination with the fixing part 5, it is convenient to fix and disassemble the laser methane alarm.

[0044] Among them, preferably, the transverse rotating member 2 includes a first mounting shell 21 arranged on the outer side wall of the top of the base plate 1, a first support plate 22 is provided on the side wall of the inner cavity of the first mounting shell 21, and a first motor 25 is installed on the side wall of the first support plate 22. One end of the execution end of the first motor 25 is rotatably connected to the side wall of the inner cavity of the first mounting shell 21, and a first worm 24 is provided at one end of the execution end of the first motor 25, and the other end of the first worm 24 is rotatably connected to the side wall of the other side of the inner cavity of the first mounting shell 21, and a matching worm gear 23 is engaged with one side of the first worm gear 24, and a rotating round rod 26 is embedded in the middle of the worm gear 23. Both ends of the rotating round rod 26 are rotatably connected to the top and bottom side walls of the mounting shell 21, and the rotating round rod One end of the top of 26 extends to the outer side wall of the top of the mounting shell 21, and the PLC controller transmits electrical signals and triggers the first motor 25 to drive the execution end. A first worm 24 is provided at one end of the execution end. One end of the execution end of the first motor 25 is rotated and connected to the side wall of the inner cavity of the first mounting shell 21, and the other end of the first worm 24 is rotated and connected to the other side wall of the inner cavity of the first mounting shell 21 for support and rotation. The rotation of the first worm 24 drives a matching worm gear 23 engaged on one side to rotate. The worm gear 23 drives a rotating round rod 26 embedded in the middle. Both ends of the rotating round rod 26 are rotated and connected to the top and bottom side walls of the mounting shell 21 for support and rotation, driving the tilt angle member 4 to adjust the lateral angle.

[0045] Preferably, the tilt angle member 4 includes a second mounting shell 41 provided on the outer side wall of one end of the top of the rotating round rod 26, a second support plate 42 is provided on the inner side wall of the second mounting shell 41, a second motor 43 is installed on one side wall of the second support plate 42, one end of the execution end of the second motor 43 is connected to a first gear 44, the other end of the first gear 44 is rotatably connected to the inner side wall of the second mounting shell 41, and a matching second gear 45 is engaged with one side of the first gear 44, a rotating long round rod 46 is embedded in the middle position of the second gear 45, and one end of the rotating long round rod 46 is rotatably connected to the second mounting shell 41 The inner cavity partition side wall, and the other end of the rotating long round rod 46 is rotatably connected to the other side wall of the inner cavity of the second mounting shell 41, and the outer side wall of the rotating long round rod 46 away from the inner cavity partition side wall of the second mounting shell 41 is embedded with a second worm 47, and the outer side wall of the top of the second mounting shell 41 is provided with a square movable groove 49, and a matching semi-arc rotating wheel 48 is engaged on one side of the top of the second worm 47. The round rods embedded in the middle of the semi-arc rotating wheel 48 are rotatably connected to the side walls on both sides of the top partition of the second mounting shell 41, and then transmit electrical signals and trigger the second motor 43 to execute the end belt through the PLC controller. The movable end is connected to the first gear 44 and is rotatably connected to the side wall of the inner cavity of the second mounting shell 41 through the other end of the first gear 44 for support and rotation. The rotation of the first gear 44 drives the second gear 45 engaged with the matching one side to rotate. The rotation of the second gear 45 drives the middle position to be embedded with a rotating long round rod 46. One end of the rotating long round rod 46 is rotatably connected to the side wall of the inner cavity of the second mounting shell 41 and the other end is rotatably connected to the other side wall of the inner cavity of the second mounting shell 41 for support and rotation. The rotation of the rotating long round rod 46 drives the inner cavity of the second mounting shell 41 away from the side wall of the inner cavity. A second worm 47 is embedded in the outer side wall of the end for rotation. The rotation of the second worm 47 drives the semi-arc rotating wheel 48 on the top side to adjust the arc rotation tilt angle on both sides under the forward and reverse rotation of the second motor 43, which simultaneously drives the pressure plate 54, the laser methane alarm body 55 fixed by the cross plate 51 and the accelerated sampling component 56 to adjust the arc rotation tilt angle on both sides. Due to the self-locking characteristics of the second worm 47 and the meshing worm gear teeth 481, the stability of the adjustment of the tilt angle is improved.

[0046] Preferably, the fixing member 5 includes a horizontal plate 51 arranged on the outer side wall of the top of the semi-arc rotating wheel 48, a slider 52 is provided on one side wall of the horizontal plate 51, and a screw 53 is provided on the other side wall of the horizontal plate 51, the screw 53 and the outer side wall of the top end of the slider 52 are slidably connected with a pressure plate 54, and a laser methane alarm body 55 is provided on the outer side wall of the top of the horizontal plate 51, and a matching abutment cap 57 is threadedly connected to the outer side wall of the top end of the screw 53, and an accelerating sampling member 56 is embedded in the side wall of one end of the horizontal plate 51. The operator manually places the laser methane alarm body 55 into the horizontal plate 51 top outer wall, and then manually move the pressure plate 54 up and down through the circular movable hole 541 on the outer wall of the top end of the screw 53 and the slider 52 at the same time to make the pressure plate 54 abut against the top side wall of the laser methane alarm body 55, and a rubber friction pad is provided on the bottom outer wall of the pressure plate 54 to increase a certain abutting friction force, and then manually rotate the outer wall of the top end of the screw 53 to be threadedly connected with a matching abutting cap 57 to abut and fix the top outer wall of the pressure plate 54, thereby completing the fixation of the laser methane alarm body 55, which is convenient for convenient fixation and disassembly of the laser methane alarm.

[0047] Preferably, the accelerated sampling member 56 includes a sleeve 561 embedded in the side wall of one end of the horizontal plate 51, a connecting air pipe 562 is provided at one end of the bottom of the sleeve 561, an air pump 563 is installed at one end of the top of the connecting air pipe 562, and a flow guide 564 is provided at one end of the bottom of the connecting air pipe 562. The air pump 563 installed at one end of the connecting air pipe 562 is triggered by the PLC controller to accelerate the extraction of external methane combustible gas through the flow guide 564 at one end of the connecting air pipe 562, which cooperates with the above-mentioned Multi-angle adjustment accelerates the flow of methane combustible gas in different areas, so that the extracted methane combustible gas is transported to the sleeve 561 through the air pump 563. A filter bracket 5611 is nested at one end of the top of the sleeve 561. The side wall of the middle inner cavity of the filter bracket 5611 is provided with a polypropylene filter 5612 to intercept solid particles in the air such as dust, hair, oil particles, etc., while ensuring that methane gas can freely pass through the top of the polypropylene filter 5612 to reach the laser probe of the laser methane alarm body 55.

[0048] Preferably, the sleeve 561 includes a filter bracket 5611 nested at one end of the top, a polypropylene filter 5612 is provided on the side wall of the middle inner cavity of the filter bracket 5611, and a fixing screw 5613 is threadedly connected to the side wall of one side of the filter bracket 5611, and the bottom end of the fixing screw 5613 is threadedly connected to the inner wall of the side wall of the top end of the sleeve 561 with a matching thread groove, and the polypropylene filter 5612 is provided on the side wall of the middle inner cavity of the filter bracket 5611 to facilitate the interception of solid particles in the air such as dust, hair, oil particles, etc., while ensuring that methane gas can freely pass through the top of the polypropylene filter 5612 to reach the laser methane alarm body 5 5 in front of the laser probe, and the polypropylene filter 5612 is chemically inert and does not react with methane, nor does it adsorb methane molecules. Through the filtering effect of the polypropylene filter 5612, the gas does not contain methane combustible gas and other impurities that affect the detection accuracy of the laser methane alarm body 55. Then, the side wall of one side of the filter bracket 5611 is threadedly connected to the fixing screw 5613, which is manually rotated to disengage the bottom end of the fixing screw 5613 from the inner wall of the threaded connection to the top end of the sleeve 561, and a matching thread groove is opened on the side wall. The side wall of the middle inner cavity of the filter bracket 5611 is provided with a polypropylene filter 5612 for regular disassembly and replacement.

[0049] Preferably, the semi-arc rotating wheel 48 includes an outer side wall provided with worm gear teeth 481 that mesh with and match the second worm 47, and the worm gear teeth 481 and the second worm 47 are self-locked during rotation.

[0050] Preferably, the second mounting shell 41 includes a camera 411 arranged on the bottom side wall of one side, and the image information of the leakage area at different viewing angles is captured and the image position information is sent through the existing technology camera 411, so as to know the detection angle position of the laser probe of the laser methane alarm body 55 and avoid leakage areas, and then the image information is captured and the image position information is sent through the existing technology camera 411 to generate corresponding electrical signals to the PLC controller.

[0051] Preferably, the pressure plate 54 includes a circular movable hole 541 adjacent to the other side of the screw 53, and the embedded side wall of the circular movable hole 541 is arranged on the outer wall of the top end of the screw 53, and the screw 53 and the outer wall of the top end of the slider 52 are moved up and down at the same time through the circular movable hole 541.

[0052] A detection method for a combustible gas detection device with a laser methane alarm, the method comprising the following steps:

[0053] Step 1: At the beginning of the work, the operator manually places the laser methane alarm body 55 into the top outer wall of the horizontal plate 51, and then manually moves the pressure plate 54 up and down through the circular movable hole 541 on the outer wall of the screw 53 and the top end of the slider 52, so that the pressure plate 54 abuts against the top side wall of the laser methane alarm body 55, and a rubber friction pad is provided on the bottom outer wall of the pressure plate 54 to increase a certain abutting friction force, and then manually rotates the outer wall of the top end of the screw 53 to be threaded with a matching abutting cap 57 to abut and fix the top outer wall of the pressure plate 54, completing the fixation of the laser methane alarm body 55, which is convenient for convenient fixation and disassembly of the laser methane alarm. The operator then uses multiple fixing screw holes 3 of the same structure with screws to install the entire device at a suitable methane combustible gas detection position;

[0054] Step 2: When performing multi-angle detection on a large area in different other directions, the second mounting shell 41 is provided with a prior art camera 411 provided on the bottom side wall of one side to capture image information of the leakage area from different viewing angles and send image position information, so as to know the detection angle position of the laser probe of the laser methane alarm body 55 and avoid leakage areas, and then the prior art camera 411 is used to capture image information and send the corresponding generated electrical signal to the PLC controller, which then transmits the electrical signal and triggers the first motor 25 to drive the first worm 24 provided at one end of the execution end to rotate and be connected to the inner cavity partition side wall of the first mounting shell 21 and the other end of the first worm 24 to be supported and rotated by the execution end of the first motor 25. The rotation of the first worm 24 drives the worm gear 23 engaged with a matching worm gear on one side to rotate, and the worm gear 23 drives the rotating rod 26 embedded in the middle to be supported and rotated by both ends of the rotating rod 26 and connected to the top and bottom side walls of the mounting shell 21, thereby driving the tilt angle member 4 to adjust the lateral angle.

[0055] Step three: further, the PLC controller transmits an electrical signal and triggers the execution end of the second motor 43 to drive one end of the first gear 44, which is connected to the side wall of the inner cavity of the second mounting shell 41 through the rotation of the first gear 44. The other end is rotated and connected to the side wall of the inner cavity of the second mounting shell 41 for support and rotation. The rotation of the first gear 44 drives one side to be meshed with a matching second gear 45 to rotate. The rotation of the second gear 45 drives a rotating long round rod 46 embedded in the middle position to be connected to the side wall of the inner cavity of the second mounting shell 41 through one end of the rotating long round rod 46 and the other end is rotated and connected to the other side wall of the inner cavity of the second mounting shell 41 for support and rotation. The rotation of the rotating long round rod 46 drives the second worm 47 embedded in the outer wall of one end away from the side wall of the inner cavity of the second mounting shell 41 to rotate, and the rotation of the second worm 47 drives the top One side of the semi-arc-shaped rotating wheel 48 is provided with worm gear teeth 481 meshing with the second worm 47 through the outer side wall, which adjusts the arc-shaped rotation tilt angle on both sides under the forward and reverse rotation of the second motor 43, and simultaneously drives the laser methane alarm body 55 fixed by the pressure plate 54 and the horizontal plate 51 and the accelerated sampling member 56 to adjust the arc-shaped rotation tilt angle on both sides. Due to the self-locking characteristics of the second worm 47 and the meshing worm gear teeth 481, the stability of the adjustment of the tilt angle is improved. Through the above operation, the laser methane alarm can be automatically adjusted at multiple angles, avoiding the laser probe of the fixed-angle laser methane alarm being able to detect only the gas in the direct path of the laser beam and unable to cover other directions in the surrounding environment, resulting in missed detection and inability to detect multiple angles over a large area.

[0056] Step 4: During accelerated sampling, the PLC controller triggers the air pump 563 installed at one end of the top of the air pipe 562 to accelerate the extraction of external methane combustible gas through the deflector 564 provided at one end of the bottom of the air pipe 562. The multi-angle adjustment mentioned above accelerates the accelerated flow of methane combustible gas in different areas, so that the extracted methane combustible gas is transported to the sleeve 561 through the air pump 563. A filter bracket 5611 is nested at one end of the top of the sleeve 561, and a polypropylene filter 5612 is provided on the side wall of the inner cavity in the middle of the filter bracket 5611 to intercept solid particles in the air such as dust, hair, oil particles, etc., while ensuring that methane gas can freely pass through the top of the polypropylene filter 5612 to reach the laser detector of the laser methane alarm body 55. The head is in front, and the polypropylene filter 5612 is chemically inert, does not react with methane, and will not adsorb methane molecules. Through the filtering effect of the polypropylene filter 5612, the gas does not contain methane combustible gas and other impurities that affect the detection accuracy of the laser methane alarm body 55. The side wall of one side of the filter bracket 5611 is threadedly connected with a fixed screw 5613, which is manually rotated to disengage the bottom end of the fixed screw 5613 from the threaded connection to the side wall of the top end of the sleeve 561, and a matching threaded groove inner wall is provided. The side wall of the middle inner cavity of the filter bracket 5611 is provided with a polypropylene filter 5612 for regular disassembly and replacement. The above-mentioned sampling operation facilitates the rapid sampling of methane combustible gas detection, improves the detection efficiency of the laser methane alarm, and is easy to operate.

[0057] Embodiment: At the beginning of work, the operator manually places the laser methane alarm body 55 into the top outer wall of the horizontal plate 51, and then manually moves the pressure plate 54 up and down through the circular movable hole 541 on the outer wall of the screw 53 and the top end of the slider 52, so that the pressure plate 54 abuts against the top side wall of the laser methane alarm body 55, and a rubber friction pad is provided on the bottom outer wall of the pressure plate 54 to increase a certain abutting friction force, and then manually rotates the outer wall of the top end of the screw 53 to be threaded with a matching abutting cap 57 to abut and fix the top outer wall of the pressure plate 54, completing the fixation of the laser methane alarm body 55, which is convenient for convenient fixation and disassembly of the laser methane alarm, and the operator then uses multiple fixing screw holes 3 of the same structure with screws to install the entire device at a suitable methane combustible gas detection position;

[0058] When performing multi-angle detection over a large area in different other directions, the second mounting shell 41 is provided with a prior art camera 411 provided on the bottom side wall on one side to capture image information of the leakage area from different viewing angles and send image position information, so as to know the detection angle position of the laser probe of the laser methane alarm body 55 and avoid leakage areas, and then the prior art camera 411 is used to capture image information and send the corresponding generated electrical signal to the PLC controller, which then transmits the electrical signal and triggers the first motor 25 to drive the first worm 24 provided at one end of the execution end to rotate and be connected to the partition side wall of the inner cavity of the first mounting shell 21 through one end of the execution end of the first motor 25 and the other end of the first worm 24 to rotate and be connected to the other side wall of the inner cavity of the first mounting shell 21 for support and rotation, the rotation of the first worm 24 drives the worm gear 23 engaged with a matching one side to rotate, and the worm gear 23 drives the rotating round rod 26 embedded in the middle to be connected to the top and bottom side walls of the mounting shell 21 through both ends of the rotating round rod 26 for support and rotation, thereby driving the tilt angle member 4 to adjust the lateral angle;

[0059] Furthermore, the PLC controller transmits an electrical signal and triggers the execution end of the second motor 43 to drive one end of the first gear 44, which is connected to the side wall of the inner cavity of the second mounting shell 41 through the rotation of the other end of the first gear 44 for support and rotation. The rotation of the first gear 44 drives one side to engage with a matching second gear 45 for rotation. The rotation of the second gear 45 drives a rotating long round rod 46 embedded in the middle position to be connected to the side wall of the inner cavity of the second mounting shell 41 through one end of the rotating long round rod 46 and the other end to be connected to the other side wall of the inner cavity of the second mounting shell 41 for support and rotation. The rotation of the rotating long round rod 46 drives the second worm 47 embedded in the outer wall of one end away from the side wall of the inner cavity of the second mounting shell 41 to rotate, and the rotation of the second worm 47 drives the top side The semi-arc rotating wheel 48 is provided with worm gear teeth 481 meshing with the second worm 47 through the outer side wall, which adjusts the arc rotation tilt angle on both sides under the forward and reverse rotation of the second motor 43, and simultaneously drives the laser methane alarm body 55 fixed by the pressure plate 54 and the cross plate 51 and the accelerated sampling member 56 to adjust the arc rotation tilt angle on both sides. Due to the self-locking characteristics of the second worm 47 and the meshing worm gear teeth 481, the stability of the adjustment of the tilt angle is improved. Through the above operation, the laser methane alarm can be automatically adjusted at multiple angles, avoiding the laser probe of the fixed-angle laser methane alarm being able to detect only the gas in the direct path of the laser beam and unable to cover other directions in the surrounding environment, resulting in missed detection and inability to detect at multiple angles over a large area.

[0060] During accelerated sampling, the PLC controller triggers the air pump 563 installed at the top end of the air pipe 562 to accelerate the extraction of external methane combustible gas through the deflector 564 provided at the bottom end of the air pipe 562. The multi-angle adjustment mentioned above accelerates the accelerated flow of methane combustible gas in different areas, so that the extracted methane combustible gas is transported to the sleeve 561 through the air pump 563. A filter bracket 5611 is nested at the top end of the sleeve 561. A polypropylene filter 5612 is provided on the side wall of the inner cavity in the middle of the filter bracket 5611 to intercept solid particles in the air such as dust, hair, oil particles, etc., while ensuring that methane gas can freely pass through the top of the polypropylene filter 5612 to reach the front of the laser probe of the laser methane alarm body 55. , and the polypropylene filter 5612 has strong chemical inertness, does not react with methane, and will not adsorb methane molecules. Through the filtering effect of the polypropylene filter 5612, the gas does not contain methane combustible gas and other impurities that affect the detection accuracy of the laser methane alarm body 55. The side wall of one side of the filter bracket 5611 is threadedly connected with a fixed screw 5613, which is manually rotated to disengage the bottom end of the fixed screw 5613 from the threaded connection to the side wall of the top end of the sleeve 561, and a matching thread groove inner wall is provided. The side wall of the middle inner cavity of the filter bracket 5611 is provided with a polypropylene filter 5612 for regular disassembly and replacement. The above sampling operation facilitates the rapid sampling of methane combustible gas detection, improves the detection efficiency of the laser methane alarm, and is easy to operate.

[0061] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A combustible gas detection device with a laser methane alarm, characterized by: It comprises a base plate (1), a transverse rotating member (2), a fixing screw hole (3), an inclined angle member (4) and a fixing member (5); A transverse rotating member (2) is provided on the top outer side wall of the bottom plate (1); The bottom plate (1) is provided with a plurality of fixing screw holes (3) of the same structure on the top outer side walls on both sides adjacent to the transverse rotating member (2); The top outer side wall of the transverse rotating member (2) is provided with an inclined angle member (4), and the top outer side wall of the inclined angle member (4) is provided with a fixing member (5).

2. The combustible gas detection device with a laser methane alarm according to claim 1, characterized in that: The transverse rotating member (2) comprises a first mounting shell (21) arranged on the outer side wall of the top of the base plate (1), a first support plate (22) is arranged on the inner side wall of the first mounting shell (21), a first motor (25) is installed on the side wall of the first support plate (22), one end of the execution end of the first motor (25) is rotatably connected to the inner side wall of the first mounting shell (21), and one end of the execution end of the first motor (25) is provided with a first worm (24), the other end of the first worm (24) is rotatably connected to the other side wall of the inner side of the first mounting shell (21), and a matching worm wheel (23) is engaged on one side of the first worm (24), a rotating round rod (26) is embedded in the middle of the worm wheel (23), both ends of the rotating round rod (26) are rotatably connected to the top and bottom side walls of the mounting shell (21), and one end of the top of the rotating round rod (26) extends to the outer side wall of the top of the mounting shell (21).

3. The combustible gas detection device with a laser methane alarm according to claim 2, characterized in that: The tilt angle member (4) comprises a second mounting shell (41) arranged on the outer side wall of one end of the top of the rotating round rod (26), a second support plate (42) is arranged on the inner side wall of the second mounting shell (41), a second motor (43) is installed on one side wall of the second support plate (42), one end of the execution end of the second motor (43) is connected to a first gear (44), the other end of the first gear (44) is rotatably connected to the inner side wall of the second mounting shell (41), and a matching second gear (45) is meshed on one side of the first gear (44), a rotating long round rod (46) is embedded in the middle position of the second gear (45), and the rotating long round rod (46) is arranged on the middle position of the second gear (45). One end of the rod (46) is rotatably connected to the side wall of the inner cavity of the second mounting shell (41), and the other end of the rotating long round rod (46) is rotatably connected to the other side wall of the inner cavity of the second mounting shell (41), and a second worm (47) is embedded in the outer wall of one end of the rotating long round rod (46) away from the side wall of the inner cavity of the second mounting shell (41), and a square movable groove (49) is opened on the outer wall of the top of the second mounting shell (41), and a matching semi-arc rotating wheel (48) is engaged on one side of the top of the second worm (47), and the round rod embedded in the middle of the semi-arc rotating wheel (48) is rotatably connected to the side walls on both sides of the top partition of the second mounting shell (41).

4. The combustible gas detection device with a laser methane alarm according to claim 3, characterized in that: The fixing member (5) includes a transverse plate (51) arranged on the outer side wall of the top of the semi-arc rotating wheel (48), a slider (52) is arranged on one side wall of the transverse plate (51), and a screw (53) is arranged on the other side wall of the transverse plate (51), the screw (53) and the outer side wall of the top end of the slider (52) are both slidably connected with a pressure plate (54), and the outer side wall of the top of the transverse plate (51) is provided with a laser methane alarm body (55), and the outer side wall of the top end of the screw (53) is threadedly connected with a matching abutment cap (57), and an accelerated sampling member (56) is embedded in the side wall of one end of the transverse plate (51).

5. The combustible gas detection device with a laser methane alarm according to claim 4, characterized in that: The accelerated sampling member (56) comprises a sleeve (561) embedded in the side wall of one end of the horizontal plate (51); a connecting air pipe (562) is provided at the bottom end of the sleeve (561); an air pump (563) is installed at the top end of the connecting air pipe (562); and a flow guide cover (564) is provided at the bottom end of the connecting air pipe (562).

6. The combustible gas detection device with a laser methane alarm according to claim 5, characterized in that: The sleeve (561) includes a filter holder (5611) embedded at one end of the top, a polypropylene filter (5612) is provided on the side wall of the middle inner cavity of the filter holder (5611), and a fixing screw (5613) is threadedly connected to the side wall of one side of the filter holder (5611), and the bottom end of the fixing screw (5613) is threadedly connected to the inner wall of the side wall of the top end of the sleeve (561) and a matching thread groove is provided.

7. The combustible gas detection device with a laser methane alarm according to claim 3, characterized in that: The semi-arc-shaped rotating wheel (48) includes an outer side wall provided with worm gear teeth (481) that mesh with and match the second worm (47).

8. The combustible gas detection device with a laser methane alarm according to claim 3, characterized in that: The second mounting shell (41) includes a camera (411) arranged on a bottom side wall of one side.

9. The combustible gas detection device with a laser methane alarm according to claim 4, characterized in that: The pressing plate (54) includes a circular movable hole (541) provided adjacent to the other side of the screw rod (53), and the inner side wall of the circular movable hole (541) is arranged on the outer side wall of one end of the top of the screw rod (53).

10. A detection method for a combustible gas detection device with a laser methane alarm according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: At the beginning of the work, the operator manually places the laser methane alarm body (55) into the outer side wall of the top of the horizontal plate (51), and then manually moves the pressure plate (54) up and down through the circular movable hole (541) on the outer side wall of the screw (53) and the top end of the slider (52) to adjust so that the pressure plate (54) abuts against the top side wall of the laser methane alarm body (55), and the bottom outer side wall of the pressure plate (54) is provided with a rubber friction pad to increase a certain abutting friction force, and then manually rotates the outer side wall of the top end of the screw (53) to be threadedly connected with a matching abutting cap (57) to abut and fix the pressure plate (54) to the top outer side wall, thereby completing the fixation of the laser methane alarm body (55), facilitating the convenient fixation and disassembly of the laser methane alarm, and the operator then uses a plurality of fixing screw holes (3) of the same structure with screws to install the entire device at a suitable methane combustible gas detection position; Step 2: When performing multi-angle detection on a large area in different other directions, the second mounting shell (41) is provided on the bottom side wall of one side to capture the image information of the leakage area from different viewing angles and send the image position information, so as to know the detection angle position of the laser probe of the laser methane alarm body (55) and avoid the leakage area. Then, the image information is captured and the image position information is sent to the PLC controller by the existing technology camera (411), and the PLC controller transmits the electrical signal and triggers the first motor (25) to drive the execution A first worm (24) is provided at one end of the row end. One end of the row end is rotated and connected to the side wall of the inner cavity of the first mounting shell (21) through the execution end of the first motor (25). The other end of the first worm (24) is rotated and connected to the other side wall of the inner cavity of the first mounting shell (21) for support and rotation. The rotation of the first worm (24) drives a worm wheel (23) engaged with a matching one side to rotate. The worm wheel (23) drives a rotating rod (26) embedded in the middle. Both ends of the rotating rod (26) are rotated and connected to the top and bottom side walls of the mounting shell (21) for support and rotation, thereby driving the tilt angle member (4) to adjust the lateral angle. Step 3: Further, the PLC controller transmits an electrical signal and triggers the execution end of the second motor (43) to drive one end connected to the first gear (44) and the other end of the first gear (44) to rotate and connect to the inner cavity partition side wall of the second mounting shell (41) for support and rotation. The rotation of the first gear (44) drives one side to be meshed with a matching second gear (45) to rotate. The rotation of the second gear (45) drives a rotating long round rod (46) embedded in the middle position to be rotated and connected to the inner cavity partition side wall of the second mounting shell (41) and the other end of the rotating long round rod (46) to support and rotate. The rotation of the rotating long round rod (46) drives the outer wall of one end of the inner cavity partition side wall away from the second mounting shell (41) to rotate. The rotation of the second worm (47) The semi-arc-shaped rotating wheel (48) on one side of the top is driven by the outer wall to be provided with worm gear teeth (481) that mesh with the second worm (47) to adjust the arc-shaped rotation tilt angle on both sides under the forward and reverse rotation of the second motor (43). At the same time, it drives the laser methane alarm body (55) fixed by the pressure plate (54) and the horizontal plate (51) and the accelerated sampling member (56) to adjust the arc-shaped rotation tilt angle on both sides. Due to the self-locking characteristics of the second worm (47) and the meshing worm gear teeth (481), the stability of the adjustment of the tilt angle is improved. Through the above operation, it is convenient to automatically adjust the laser methane alarm at multiple angles, avoiding the laser probe of the fixed-angle laser methane alarm that can only detect the gas on the direct path of the laser beam and cannot cover other directions in the surrounding environment, resulting in missed detection and inability to detect at multiple angles over a large area. Step 4: When accelerating the sampling, the PLC controller triggers the air pump (563) installed at the top end of the air pipe (562) to accelerate the extraction of external methane combustible gas through the guide cover (564) provided at the bottom end of the air pipe (562). The multi-angle adjustment mentioned above accelerates the accelerated flow of methane combustible gas in different areas, so that the extracted methane combustible gas is transported to the sleeve (561) through the air pump (563). The filter bracket (5611) is nested at the top end of the sleeve (561). The side wall of the inner cavity of the filter bracket (5611) is provided with a polypropylene filter (5612) to intercept solid particles in the air such as dust, hair, oil particles, etc., while ensuring that the methane gas can freely pass through the top of the polypropylene filter (5612) to reach the laser methane alarm body (55). In front of the laser probe, the polypropylene filter (5612) is chemically inert and does not react with methane, nor does it adsorb methane molecules. Through the filtering effect of the polypropylene filter (5612), the gas does not contain methane combustible gas and other impurities that affect the detection accuracy of the laser methane alarm body (55). The side wall of one side of the filter bracket (5611) is threadedly connected with a fixed screw (5613) and manually rotated to make the bottom end of the fixed screw (5613) detach from the inner wall of the threaded connection with the side wall of the top end of the sleeve (561) and a matching thread groove is opened. The polypropylene filter (5612) is regularly disassembled and replaced on the side wall of the middle inner cavity of the filter bracket (5611). The above sampling operation facilitates the accelerated sampling of methane combustible gas detection, improves the detection efficiency of the laser methane alarm, and is easy to operate.

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