A laser gas sensor convenient to disassemble

Abstract

The utility model discloses a laser gas sensor convenient to dismount relates to sensor technical field, including: sensor body and laser head, mounting piece and mounting bush, the inner wall of mounting bush is equipped with the installation through -hole, the inner wall of installation through -hole is equipped with threaded rod, the inner wall of mounting bush is equipped with the joint groove, the inner wall of groove body is installed with the sliding rod, the outer wall of sliding rod is installed with the sliding block, the outer wall of sliding block is installed with the joint block, the inner wall of groove body is installed with the spring. The utility model through being equipped with the installation and dismounting mechanism, installs the mounting bush in the specified position, then press the joint block and make the sliding block move on the sliding rod, and spring is pressed, then inserts the mounting piece into the installation groove of mounting bush and promotes, when the joint block moves to the below of joint groove, spring resets and promotes the sliding block to move on the sliding rod, then the joint block is bounced into the joint groove, then installs the sensor body, makes sensor body installation and dismounting very convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, concretely is a laser gas sensor convenient to dismouting. BACKGROUND

[0002] Laser gas sensor is a kind of high-precision gas detection device based on laser technology, realizes quantitative analysis to gas composition and concentration by the selective absorption effect of specific wavelength laser and target gas molecules, utilizes monochromaticity and directionality of laser, and the absorption intensity of specific wavelength laser is measured by gas molecules, is converted into electric signal to calculate gas concentration.It is mainly applied to the detection of methane (CH4), oxygen (Oz), carbon dioxide (COz) and other gases, covers industrial safety, environmental monitoring, medical health and other fields.

[0003] Patent document CN221326334U discloses a kind of laser gas sensor of opposite radiation, which discloses "including gas chamber shell, gas chamber shell is equipped with gas chamber, gas chamber includes middle chamber and two symmetrically arranged communication chambers on the two sides of middle chamber, communication chamber is communicated with middle chamber, two communication chambers are coaxially provided with placing hole, one of placing hole is equipped with photoelectric detector, another placing hole is equipped with laser.The utility model makes laser and photoelectric detector on a horizontal line by specific shape and size of gas chamber shell, so that light path is a straight line, no longer needs mirror to reflect light path, can improve detection efficiency, detection accuracy, sensitivity, stability and reduce cost while simplifying light path".

[0004] However, the above-mentioned disclosure of a kind of laser gas sensor of opposite radiation mainly considers improving detection efficiency, detection accuracy, sensitivity, stability and reducing cost, and the problem of inconvenient installation and disassembly of sensor body.

[0005] Therefore, it is necessary to study the installation and disassembly mechanism, so as to conveniently install and disassemble the sensor body. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of laser gas sensor convenient to dismouting to solve the technical problem that laser gas sensor has the function of convenient dismouting raised in the above background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of laser gas sensor convenient to dismouting, comprising: sensor body and laser head, the outer wall of the sensor body is equipped with installation and disassembly mechanism, the installation and disassembly mechanism is used to conveniently install and disassemble the sensor body;

[0008] The dismounting mechanism comprises a mounting block and a mounting sleeve, the mounting block is located on the outer wall of the sensor body, the outer wall of the mounting block is provided with the mounting sleeve, the inner wall of the mounting sleeve is provided with a mounting through hole, the inner wall of the mounting through hole is provided with a threaded rod, the inner wall of the mounting sleeve is provided with a clamping groove, the outer wall of the mounting block is provided with a groove body, the inner wall of the groove body is mounted with a sliding rod, the outer wall of the sliding rod is surrounded and mounted with a sliding block, the outer wall of the sliding block is mounted with a clamping block, the inner wall of the groove body is mounted with a spring, and one end of the spring extends to the outer wall of the sliding block.

[0009] Preferably, the laser head is located on the outer wall of the sensor body.

[0010] Preferably, the outer wall of the sensor body is provided with a protection mechanism for protecting the laser head.

[0011] Preferably, the protection mechanism comprises a first magnet ring and a protective cover, and the protective cover is made of aluminum alloy.

[0012] Preferably, the outer wall of the sensor body is mounted with the first magnet ring, the outer wall of the first magnet ring is mounted with the protective cover, and the outer wall of the protective cover is mounted with a second magnet ring.

[0013] Preferably, the inner wall of the protective cover is embeddedly mounted with a transparent optical glass sheet.

[0014] Preferably, the inner wall of the protective cover is provided with a heat dissipation groove, the inner wall of the heat dissipation groove is mounted with a silver heat conduction plate, and the outer wall of the silver heat conduction plate is mounted with a plurality of heat dissipation fins.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The dismounting mechanism is installed, which facilitates the installation and dismounting of the sensor body. The existing sensor body cannot be conveniently installed and dismounted, so improvement is needed. First, the mounting sleeve is installed at a specified position through the threaded rod and the external threaded groove. Then, the clamping block is pressed to move the sliding block on the sliding rod, and the spring is compressed. Then, the mounting block is inserted into the mounting groove of the mounting sleeve and pushed. When the clamping block moves below the clamping groove, the spring resets and pushes the sliding block to move on the sliding rod. Then, the clamping block is popped into the clamping groove, and the sensor body is installed, so that the sensor body is very convenient to install and dismount.

[0017] 2. The utility model discloses a protection mechanism is installed to the protection of laser head, the existing laser head is exposed outside and can cause the water vapor or dust adsorption of outside, then need to protect the laser head, install the protection cover in the outside of laser head through first magnet ring and second magnet ring, install the protection cover in the outside of laser head and protect, and the transparent optical glass sheet is located one side of laser head light source, make normal laser of laser head emit laser, and the silver heat conduction plate in the heat dissipation groove is used for adsorbing the heat in the protection cover, and carries out heat conduction through the heat dissipation fin of outside, makes the heat that will accumulate in the protection cover and is dissipated, avoids the heat accumulation of laser head long -time work. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure schematic diagram of the utility model;

[0019] Figure 2 It is installation block and installation cover side surface structure schematic diagram of the utility model;

[0020] Figure 3 It is the side surface structure schematic diagram of the utility model's clamping block;

[0021] Figure 4 It is the side surface structure schematic diagram of the utility model's magnet ring;

[0022] Figure 5 It is the side surface structure schematic diagram of the utility model's protection cover.

[0023] In the drawing: 1, sensor body; 2, laser head; 3, installation block; 4, installation cover; 5, installation through-hole; 6, threaded rod; 7, clamping groove; 8, groove; 9, sliding rod; 10, sliding block; 11, clamping block; 12, spring; 13, first magnet ring; 14, protection cover; 15, second magnet ring; 16, optical glass sheet; 17, heat dissipation groove; 18, silver heat conduction plate; 19, heat dissipation fin. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] In the description of the utility model, it needs to explain, the term "upper", "lower", "internal", "external" "front end", "rear end", "both ends", "one end", "the other end" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate with a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the term "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to explain, unless otherwise specified and limited, the term "installation", "set with", "connection" and so on, should be broad understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0027] Please refer to Figure 1 And Figure 2 A laser gas sensor convenient to disassemble, comprising: sensor body 1 and laser head 2, laser head 2 is located on the outer wall of sensor body 1, sensor body 1 is based on tunable diode laser absorption spectroscopy (TDLAS), its core is to utilize the selective absorption characteristics of gas molecules to specific wavelength laser, specifically: through the laser emission and tuning of laser head 2: the semiconductor laser emits laser with periodic changeable wavelength by driving current or temperature modulation, the center wavelength is accurately tuned to the absorption spectrum line (such as 1653.7nm of methane) of the gas to be measured;Gas absorption and light intensity attenuation: when laser passes through gas, gas molecules absorb specific wavelength light energy, resulting in laser intensity attenuation. The attenuation degree follows Lambert-Bill law, and is proportional to the gas concentration;Signal processing and concentration inversion: the photodetector receives the transmitted light signal, converts it into an electrical signal, extracts the second harmonic signal (linearly related to concentration) through lock-in amplification technology, and inversely calculates the gas concentration combined with the calibration curve.

[0028] Please refer to Figure 2 And Figure 3The outer wall of the sensor body 1 is provided with an installation and disassembly mechanism, which is used to conveniently install and disassemble the sensor body 1. The installation and disassembly mechanism comprises an installation block 3 and an installation sleeve 4. The installation block 3 is located on the outer wall of the sensor body 1. The outer wall of the installation block 3 is provided with the installation sleeve 4. The inner wall of the installation sleeve 4 is provided with an installation through hole 5. The inner wall of the installation through hole 5 is provided with a threaded rod 6. The inner wall of the installation sleeve 4 is provided with a clamping groove 7. The outer wall of the installation block 3 is provided with a groove body 8. The inner wall of the groove body 8 is provided with a sliding rod 9. The outer wall of the sliding rod 9 is surrounded by a sliding block 10. The outer wall of the sliding block 10 is provided with a clamping block 11. The inner wall of the groove body 8 is provided with a spring 12. One end of the spring 12 extends to the outer wall of the sliding block 10. The existing sensor body 1 cannot be conveniently installed and disassembled, so it needs to be improved. First, install the installation sleeve 4 in the specified position through the threaded rod 6 and the external threaded groove. Then press the clamping block 11 to make the sliding block 10 move on the sliding rod 9. The spring 12 is compressed. Then insert the installation block 3 into the installation groove of the installation sleeve 4 and push it. When the clamping block 11 moves below the clamping groove 7, the spring 12 resets and pushes the sliding block 10 to move on the sliding rod 9. Then, the clamping block 11 is popped into the clamping groove 7. Then, the sensor body 1 is installed, making the sensor body 1 very convenient to install and disassemble.

[0029] Please refer to Figure 4 and Figure 5 The outer wall of the sensor body 1 is provided with a protection mechanism, which is used to protect the laser head 2. The protection mechanism comprises a first magnet ring 13 and a protective cover 14. The protective cover 14 is made of aluminum alloy. The outer wall of the sensor body 1 is provided with the first magnet ring 13. The outer wall of the first magnet ring 13 is provided with the protective cover 14. The outer wall of the protective cover 14 is provided with a second magnet ring 15. The inner wall of the protective cover 14 is inlaid with a transparent optical glass sheet 16. The inner wall of the protective cover 14 is provided with a heat dissipation groove 17. The inner wall of the heat dissipation groove 17 is provided with a silver heat conduction plate 18. The outer wall of the silver heat conduction plate 18 is provided with a plurality of heat dissipation fins 19. The existing laser head 2 is exposed to the outside, which can cause water vapor or dust to be adsorbed. Therefore, the laser head 2 needs to be protected. The protective cover 14 is installed on the outside of the laser head 2 through the first magnet ring 13 and the second magnet ring 15. The protective cover 14 is installed on the outside of the laser head 2 for protection. The transparent optical glass sheet 16 is located on one side of the laser head 2 light source, so as not to affect the normal emission of the laser head 2. The silver heat conduction plate 18 in the heat dissipation groove 17 is used to adsorb the heat in the protective cover 14. The heat is conducted through the external heat dissipation fins 19, so as to dissipate the heat accumulated in the protective cover 14, avoiding the accumulation of heat in the laser head 2 for a long time.

[0030] The working principle is that the sensor body 1 is based on tunable diode laser absorption spectroscopy (TDLAS), the core of which is to utilize the selective absorption characteristics of gas molecules to specific wavelength laser, specifically: through laser emission and tuning of the laser head 2: the semiconductor laser emits laser with periodically changed wavelength by driving current or temperature modulation, and the center wavelength is accurately tuned to the absorption spectrum line (such as 1653.7nm of methane) of the gas to be measured; gas absorption and light intensity attenuation: when the laser passes through the gas, the gas molecules absorb light energy of specific wavelength, resulting in attenuation of laser intensity. The attenuation degree follows the Lambert-Beer law and is proportional to the gas concentration; signal processing and concentration inversion: the photodetector receives the transmitted light signal, which is converted into an electrical signal, and then the second harmonic signal (linearly related to the concentration) is extracted through the lock-in amplification technology, and the gas concentration is inversely calculated by combining the calibration curve. The existing sensor body 1 cannot be conveniently installed and disassembled, so it needs to be improved. First, the mounting sleeve 4 is installed at the specified position through the threaded rod 6 and the external threaded groove, then the sliding block 10 is moved on the slide rod 9 by pressing the clamping block 11, the spring 12 is compressed, then the mounting block 3 is inserted into the mounting groove of the mounting sleeve 4 and pushed, when the clamping block 11 moves to the lower side of the clamping groove 7, the spring 12 resets and pushes the sliding block 10 to move on the slide rod 9, then the clamping block 11 is popped into the clamping groove 7, and the sensor body 1 is installed, so that the sensor body 1 is very convenient to install and disassemble. The existing laser head 2 is exposed to the outside, which can cause water vapor or dust adsorption, so the laser head 2 needs to be protected. The protective cover 14 is installed outside the laser head 2 through the first magnet ring 13 and the second magnet ring 15, so that the protective cover 14 is installed outside the laser head 2 for protection, and the transparent optical glass sheet 16 is located on one side of the laser head 2 light source, so that it does not affect the normal emission of the laser head 2. The silver heat conduction plate 18 in the heat dissipation groove 17 is used to adsorb the heat in the protective cover 14, and the heat is conducted through the external heat dissipation fin 19, so that the heat accumulated in the protective cover 14 is dissipated, avoiding the accumulation of heat caused by long-time work of the laser head 2.

[0031] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A laser gas sensor that is easy to assemble and disassemble, characterized in that, Includes: a sensor body (1) and a laser head (2), wherein the outer wall of the sensor body (1) is provided with an installation and removal mechanism, which is used to facilitate the installation and removal of the sensor body (1); The installation and removal mechanism includes an installation block (3) and an installation sleeve (4). The installation block (3) is located on the outer wall of the sensor body (1). The outer wall of the installation block (3) is provided with an installation sleeve (4). The inner wall of the installation sleeve (4) is provided with an installation through hole (5). The inner wall of the installation through hole (5) is provided with a threaded rod (6). The inner wall of the installation sleeve (4) is provided with a snap-fit ​​groove (7). The outer wall of the installation block (3) is provided with a groove (8). The inner wall of the groove (8) is provided with a slide rod (9). The outer wall of the slide rod (9) is surrounded by a slider (10). The outer wall of the slider (10) is provided with a snap-fit ​​block (11). The inner wall of the groove (8) is provided with a spring (12), and one end of the spring (12) extends to the outer wall of the slider (10).

2. The laser gas sensor that is easy to assemble and disassemble according to claim 1, characterized in that: The laser head (2) is located on the outer wall of the sensor body (1).

3. The laser gas sensor that is easy to assemble and disassemble according to claim 1, characterized in that: The outer wall of the sensor body (1) is provided with a protective mechanism, which is used to protect the laser head (2).

4. A laser gas sensor that is easy to assemble and disassemble according to claim 3, characterized in that: The protective mechanism includes a first magnet ring (13) and a protective cover (14), the protective cover (14) being made of aluminum alloy.

5. A laser gas sensor that is easy to assemble and disassemble according to claim 4, characterized in that: The outer wall of the sensor body (1) is equipped with a first magnet ring (13), the outer wall of the first magnet ring (13) is equipped with a protective cover (14), and the outer wall of the protective cover (14) is equipped with a second magnet ring (15).

6. A laser gas sensor that is easy to assemble and disassemble according to claim 5, characterized in that: The inner wall of the protective cover (14) is inlaid with a transparent optical glass plate (16).

7. A laser gas sensor that is easy to assemble and disassemble according to claim 5, characterized in that: The inner wall of the protective cover (14) is provided with a heat dissipation groove (17), and a silver heat-conducting plate (18) is installed on the inner wall of the heat dissipation groove (17). Multiple sets of heat dissipation fins (19) are installed on the outer wall of the silver heat-conducting plate (18).

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