Laser methane detector
By using air pumps and delivery tube systems in laser methane detectors to cool the laser generator and detectors, and improving the drive and swing components, the damage to the equipment by the high-temperature environment is solved, and the reliability and accuracy of the detection is improved.
Patent Information
- Application Number
- CN202420636223.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-29
AI Technical Summary
When existing laser methane detectors are installed at high outdoors, they are susceptible to high-temperature environment erosion, causing electronic components to age and affecting equipment reliability.
A laser methane detector including an air pump, a conveying pipe, a protective top and a one-way air valve is designed. By transporting the low-temperature air in the factory to the hollow cavity of the protective top, the laser generator is used to use the one-way air valve at the air outlet. Blow and cool down with the detector, and achieve more precise rotation and swing through improved drive and swing components, combining thermal insulation and wear-resistant layers to improve the durability of the equipment.
It effectively avoids damage to electronic components by high temperature, improves the reliability and accuracy of methane leakage detection, and extends the service life of the equipment.
Smart Images
Figure CN222144850U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of methane detection, in particular to a laser methane detector. Background Art
[0002] In the petroleum, chemical, electric power, mining and other industries, there is a risk of methane gas leakage during their production, manufacturing, gathering, storage, distribution and application. Laser methane detectors (mainly including laser detectors and laser generators) on poles in the factory are often used to conduct leak detection in the detection area so as to detect leaks in time and carry out emergency repairs to avoid accidents.
[0003] In the prior art, a driving assembly that enables the laser methane detector to rotate in a circumferential direction and a swing assembly that enables the laser methane detector to swing up and down are installed on the vertical pole to expand the detection range and detection flexibility. However, the laser methane detector installed at high places outdoors for a long time will be corroded by the environment. The high temperature has a greater impact on the internal electronic components, which will accelerate the aging of the electronic components, thereby affecting the reliability of the laser methane detector.
[0004] Therefore, in order to solve the above problems, a laser methane detector is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a laser methane detector which is flexible to use and can withstand high temperature environments, so as to solve the problems raised in the above-mentioned background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A laser methane detector comprises an air pump, a lower shell and an upper shell, wherein the upper shell is rotatably mounted on the upper side of the lower shell, a transmission cylinder is rotatably mounted on the upper shell, a laser generator is fixedly mounted on one end of the transmission cylinder, a laser detector is fixedly mounted on the other end of the transmission cylinder, a driving assembly for rotating the upper shell is arranged inside the lower shell, and a swing assembly for swinging the transmission cylinder is arranged inside the upper shell;
[0008] A protective top is fixedly installed on the top of the upper shell by a support rod, the protective top is provided with a hollow cavity, and air outlets connected to the hollow cavity are evenly opened at the bottom of the protective top. A delivery pipe is fixedly installed on the side wall inside the upper shell by a clamp, the upper end of the delivery pipe passes through the upper shell and is connected to the hollow cavity, and the lower end of the delivery pipe is fixedly assembled to the output end of the air pump.
[0009] Specifically, the protective roof is dome-shaped.
[0010] Specifically, each of the air outlets is equipped with a one-way air valve.
[0011] Specifically, an air filter is fixedly installed at the input end of the air pump.
[0012] Specifically, the driving assembly includes a reduction motor and a connecting frame, the reduction motor is located at the center of the lower shell, the body of the reduction motor is fixedly assembled with the lower shell through the connecting frame, and the output end of the reduction motor is fixedly assembled with the upper shell through the connecting frame.
[0013] Specifically, a flange is provided on the lower side of the upper shell, and a bearing is installed between the flange and the lower shell.
[0014] Specifically, the swing assembly includes a servo motor, a worm and a worm wheel. The servo motor is fixedly mounted on the side wall inside the upper shell, the worm is fixedly mounted on the output end of the servo motor, the worm wheel is fixedly mounted on the transmission cylinder, and the worm is meshed and assembled with the worm wheel.
[0015] Specifically, the transmission cylinder is provided with a wire-passing hole, and the two ends of the transmission cylinder are respectively connected with the inside of the laser generator and the laser detector.
[0016] Specifically, a heat insulation layer is fixedly installed on the upper surface of the protective top, and a wear-resistant layer is fixedly installed on the upper surface of the heat insulation layer.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The air pump can deliver the air with lower temperature in the plant into the hollow cavity of the protective roof through the delivery pipe, and discharge it through the one-way air valve at the air outlet, which can blow and cool the laser generator and laser detector, avoid high temperature from damaging the internal electronic components, and improve the reliability of methane leak detection;
[0019] The improved driving assembly and swing assembly can more accurately rotate the laser generator and the laser detector in a circular direction and swing up and down. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic front view of the structure of the utility model;
[0021] Figure 2 for Figure 1 The schematic partial cross-section of the structure in the AA direction;
[0022] Figure 3 It is a schematic cross-sectional view of the structure of the protective top of the utility model.
[0023] In the figure: 1 air pump, 2 delivery pipe, 3 lower shell, 4 upper shell, 5 worm gear, 6 transmission cylinder, 7 protective top, 8 one-way air valve, 9 heat insulation layer, 10 wear-resistant layer, 11 laser generator, 12 worm, 13 servo motor, 14 reduction motor, 15 air filter, 16 laser detector. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1 , Figure 2 and Figure 3 The utility model provides a laser methane detector, including an air pump 1, a lower shell 3 and an upper shell 4, the upper shell 4 is rotatably mounted on the upper side of the lower shell 3, the upper shell 4 is rotatably mounted with a transmission cylinder 6, one end of the transmission cylinder 6 is fixedly mounted with a laser generator 11, and the other end of the transmission cylinder 6 is fixedly mounted with a laser detector 16; a driving component for rotating the upper shell 4 is arranged inside the lower shell 3, so that the upper shell 4 can rotate circumferentially, and a swinging component for swinging the transmission cylinder 6 is arranged inside the upper shell 4, so that the transmission cylinder 6 can drive the laser generator 11 and the laser detector 16 to swing up and down synchronously.
[0026] The laser generator 11 and the laser detector 16 are existing components, and the TDLAS technology is used. This technology mainly utilizes the characteristics of the narrow line width and wavelength of the tunable semiconductor laser that change with the injected current to measure a single or several absorption lines of a molecule that are very close and difficult to distinguish. The absorption spectrum can be used to invert state parameters such as gas concentration and temperature, thereby achieving the purpose of methane leakage detection.
[0027] A protective top 7 is fixedly installed on the top of the upper shell 4 through a support rod. The protective top 7 is used to shield and protect the laser generator 11 and the laser detector 16 without affecting the movement of the laser generator 11 and the laser detector 16; the protective top 7 is provided with a hollow cavity, and air outlets connected to the hollow cavity are evenly opened at the bottom of the protective top 7. A delivery pipe 2 is fixedly installed on the side wall inside the upper shell 4 through a clamp. The upper end of the delivery pipe 2 passes through the upper shell 4 and is connected and assembled with the hollow cavity, and the lower end of the delivery pipe 2 is fixedly assembled with the output end of the air pump 1; the delivery pipe 2 is connected with the air pump 1 arranged in the factory building through an internal wiring. When the air pump 1 is working, the air with a lower temperature in the factory building can be transported to the hollow cavity of the protective top 7 through the delivery pipe 2, and discharged evenly through the air outlet to blow and cool the laser generator 11 and the laser detector 16.
[0028] Specifically, the protective roof 7 is dome-shaped and can have the functions of falling object protection, rain and snow diversion, etc., to ensure the protective effect of the laser generator 11 and the laser detector 16.
[0029] Specifically, each air outlet is equipped with a one-way air valve 8, such as a duckbill one-way valve, whose one-way delivery function can ensure that the gas is output from the hollow cavity, and dust in the external environment will not enter the hollow cavity.
[0030] Specifically, an air filter 15 is fixedly installed at the input end of the air pump 1. The air filter 15 is an existing component used to filter the air entering the air pump 1 to avoid contamination or even blockage of the delivery pipe 2, the hollow cavity, the air outlet and the one-way air valve 8.
[0031] Specifically, Figure 2 As shown, the driving assembly includes a reduction motor 14 and a connecting frame. The reduction motor 14 is located at the center of the lower shell 3. The body of the reduction motor 14 is fixedly assembled with the lower shell 3 through the connecting frame, and the output end of the reduction motor 14 is fixedly assembled with the upper shell 4 through the connecting frame. The lower connecting frame is used to fix and support the reduction motor 14, and the upper connecting frame is used to transmit torque. When the reduction motor 14 is working, the upper shell 4 can be rotated circumferentially through the upper connecting frame.
[0032] Specifically, a flange is provided on the lower side of the upper shell 4 , and a bearing is installed between the flange and the lower shell 3 . The setting of the bearing can reduce the rotation resistance of the upper shell 4 .
[0033] Specifically, the swing assembly includes a servo motor 13, a worm 12 and a worm wheel 5. The servo motor 13 is fixedly mounted on the side wall inside the upper shell 4, the worm 12 is fixedly mounted on the output end of the servo motor 13, the worm wheel 5 is fixedly mounted on the transmission cylinder 6, and the worm 12 is meshed and assembled with the worm wheel 5. When the servo motor 13 is working, the worm 12 can be rotated forward and reversely, thereby rotating the worm wheel 5 by reducing speed and increasing torque, accurately swinging the laser generator 11 and the laser detector 16 up and down, and having reverse braking capability to prevent free movement.
[0034] Specifically, the transmission cylinder 6 is provided with a wire hole, and the two ends of the transmission cylinder 6 are respectively connected with the interior of the laser generator 11 and the laser detector 16; the wires of the laser generator 11 and the laser detector 16 can pass through the interior of the transmission cylinder 6, and then enter the upper shell 4 through the wire hole, and are connected with the external power supply by internal wiring, which can avoid the erosion of the external environment to the wires and extend the service life.
[0035] Specifically, Figure 3As shown, a heat-insulating layer 9, such as foam plastic, is fixedly installed on the upper surface of the protective top 7 for heat insulation to prevent the temperature of the protective top 7 from rising too quickly; a wear-resistant layer 10, such as wear-resistant rubber, is fixedly installed on the upper surface of the heat-insulating layer 9 to protect the heat-insulating layer 9 and prevent the heat-insulating layer 9 from being damaged.
[0036] The working principle of this embodiment:
[0037] The lower shell 3 is installed on the top of the pole through a flange structure. The wires of the laser generator 11 and the laser detector 16 enter the interior of the upper shell 4 and the lower shell 3 through the transmission cylinder 6 and the wire hole, and are then electrically connected to the power supply and the main machine in the factory through the interior of the pole. The internal wiring method can prevent the wires from contacting the external environment and extend the service life.
[0038] The delivery pipe 2 is also connected to the air pump 1 in the factory through the upper shell 4, the lower shell 3, and the inside of the vertical pole. The internal wiring method can prevent the delivery pipe 2 from contacting the external high temperature environment and keep the low temperature of the delivered gas.
[0039] When the air pump 1 is working, the air with lower temperature in the factory can be filtered through the air filter 15, and then transported to the hollow cavity of the protective roof 7 through the delivery pipe 2, and evenly discharged through the one-way air valve 8 at the air outlet, blowing and cooling the laser generator 11 and the laser detector 16 without affecting the circumferential rotation and up and down swinging movements, thereby improving the reliability of methane leak detection.
[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A laser methane detector, characterized in that: The invention comprises an air pump (1), a lower shell (3) and an upper shell (4); the upper shell (4) is rotatably mounted on the upper side of the lower shell (3); a transmission cylinder (6) is rotatably mounted on the upper shell (4); a laser generator (11) is fixedly mounted on one end of the transmission cylinder (6); a laser detector (16) is fixedly mounted on the other end of the transmission cylinder (6); a driving component for rotating the upper shell (4) is arranged inside the lower shell (3); and a swinging component for swinging the transmission cylinder (6) is arranged inside the upper shell (4); A protective top (7) is fixedly mounted above the upper shell (4) via a support rod, the protective top (7) is provided with a hollow cavity, and air outlets connected to the hollow cavity are evenly opened at the bottom of the protective top (7), a delivery pipe (2) is fixedly mounted on the side wall inside the upper shell (4) via a clamp, the upper end of the delivery pipe (2) passes through the upper shell (4) and is connected to the hollow cavity, and the lower end of the delivery pipe (2) is fixedly assembled with the output end of the air pump (1).
2. A laser methane detector according to claim 1, characterized in that: The protective roof (7) is dome-shaped.
3. A laser methane detector according to claim 1, characterized in that: The air outlets are all equipped with one-way air valves (8).
4. A laser methane detector according to claim 1, characterized in that: An air filter (15) is fixedly mounted on the input end of the air pump (1).
5. A laser methane detector according to claim 1, characterized in that: The driving assembly comprises a reduction motor (14) and a connecting frame, wherein the reduction motor (14) is located at the center of the lower housing (3), the body of the reduction motor (14) is fixedly assembled with the lower housing (3) via the connecting frame, and the output end of the reduction motor (14) is fixedly assembled with the upper housing (4) via the connecting frame.
6. A laser methane detector according to claim 1, characterized in that: A flange is provided on the lower side of the upper shell (4), and a bearing is installed between the flange and the lower shell (3).
7. A laser methane detector according to claim 1, characterized in that: The swing assembly comprises a servo motor (13), a worm (12) and a worm wheel (5); the servo motor (13) is fixedly mounted on the side wall inside the upper housing (4); the worm (12) is fixedly mounted on the output end of the servo motor (13); the transmission cylinder (6) is fixedly mounted on the worm wheel (5); and the worm (12) is meshedly assembled with the worm wheel (5).
8. The laser methane detector according to claim 1, characterized in that: The transmission cylinder (6) is provided with a wire-passing hole, and the two ends of the transmission cylinder (6) are respectively connected to the inside of the laser generator (11) and the laser detector (16).
9. A laser methane detector according to claim 1, characterized in that: A heat insulation layer (9) is fixedly mounted on the upper surface of the protective top (7), and a wear-resistant layer (10) is fixedly mounted on the upper surface of the heat insulation layer (9).