Gas analyzer based on laser principle

Abstract

The invention discloses a laser principle-based gas analyzer, which comprises a cooling liquid tank, the top end of the cooling liquid tank is provided with a fixed sleeve fixedly connected with the cooling liquid tank, the fixed sleeve is sleeved with a rod body, the top end of the rod body is provided with an outer shell, and the outer shell is internally provided with an inner shell sleeved with the outer shell; a laser sleeved with the inner shell is arranged in the inner shell, a laser detection head is arranged at the end of the laser, a first channel is formed between the outer shell and the inner shell, a second channel is defined between the inner shell and the outer wall of the laser, an infusion pump is fixed in the cooling liquid box, and the output end of the infusion pump communicates with a first pipeline. The other end of the first pipeline is communicated with the second channel, the interior of the cooling liquid box is communicated with a second pipeline, the other end of the second pipeline is communicated with the second channel, an air pump is fixed to the rear end of the outer shell, the output end of the air pump is communicated with the first channel, and the other opposite end of the outer shell is provided with an air outlet nozzle communicated with the first channel. According to the invention, reliable cooling and dust prevention can be carried out on the laser.

Description

Technical Field

[0001] The invention relates to the technical field of gas analyzers, and in particular to a gas analyzer based on the laser principle. Background Art

[0002] Laser gas analyzer equipment generally uses tunable semiconductor laser absorption spectroscopy (TDLAS) technology to detect gas concentration. When a beam of infrared light with a continuous wavelength passes through a substance, and the vibration frequency or rotation frequency of a group in the substance molecule is the same as the frequency of the infrared light, the molecule absorbs energy and undergoes energy level transition, and the light of this wavelength will be absorbed by the substance, thus forming a characteristic infrared absorption spectrum of the substance molecule.

[0003] The laser output wavelength is related to the operating current and the operating temperature. Current laser gas analyzers generally use fans for heat dissipation. However, in some areas with large temperature differences, the heat dissipation and refrigeration of the fans cannot meet the stable working requirements of the laser gas analyzer. Therefore, it is of great significance to design a gas analyzer with efficient cooling to ensure a constant internal operating temperature. Summary of the invention

[0004] The purpose of this application is to provide a gas analyzer based on the laser principle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A gas analyzer based on the laser principle, comprising a coolant tank, a fixed sleeve, a rod body, an outer shell, an inner shell, a laser, a liquid pump, a refrigerator, an air outlet nozzle and an air pump, wherein the top of the coolant tank is provided with a fixed sleeve fixedly connected thereto, the fixed sleeve is sleeved with the rod body, the top of the rod body is provided with an outer shell fixedly connected thereto and arranged horizontally, the inner shell is provided with an inner shell sleeved with the inner shell, the inner shell is provided with a laser sleeved with the inner shell, the laser comprises a laser detection head whose one end extends to the outside of the outer shell, a first channel is enclosed between the outer shell and the inner shell, a second channel is enclosed between the inner shell and the outer wall of the laser, a liquid pump is fixedly installed inside the coolant tank, the output end of the liquid pump is connected to a first pipeline, the other end of the first pipeline is connected to the second channel, the interior of the coolant tank is connected to a second pipeline, the other end of the second pipeline is connected to the second channel, an air pump is fixedly installed at the rear end of the outer shell, the output end of the air pump passes into the interior of the first channel, and the other end of the outer shell is provided with a

[0006] An air outlet nozzle is connected to a channel, and the air outlet nozzle is arranged obliquely toward the laser detection head.

[0007] Preferably, a refrigerator for cooling the coolant inside the coolant tank is fixedly installed at the bottom end thereof, and heat dissipation fins are fixedly installed at the side of the coolant tank.

[0008] Preferably, a mounting foot is fixedly mounted on the bottom end of the coolant tank to support the coolant tank, and a mounting hole is formed on the mounting foot.

[0009] Preferably, a top end of the coolant tank is provided with a liquid injection port connected to the interior thereof.

[0010] Preferably, a plurality of wavy heat dissipation fins arranged around the axis of the laser are fixedly mounted on the shell of the laser, the wavy heat dissipation fins pass into the interior of the second channel, and through holes are formed on the wavy heat dissipation fins.

[0011] Preferably, the rod body and the fixing sleeve are connected in a damped rotation manner.

[0012] Preferably, the second channel has a fan-shaped cross section, and the first pipeline and the second pipeline are respectively distributed at two ends of the fan-shaped cross section.

[0013] In summary, the technical effects and advantages of the present invention are as follows:

[0014] In the present invention, the coolant in the coolant tank is extracted by a liquid pump, the coolant enters the second channel from the first pipe, circulates through the outer wall of the laser, and then flows back to the coolant tank from the second pipe at the other end, taking away the heat of the laser in the process. Air is sent into the first channel by an air pump, and the air takes away part of the cold air by exchanging heat with the inner shell. The part of the cold air is ejected from the air outlet nozzle at the end, and the ejected cold air is directed toward the laser detection head, thereby preventing dust from adhering to the surface of the laser detection head and cooling the laser detection head at the same time, thereby achieving reliable cooling of the laser and ensuring its stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of a gas analyzer based on the laser principle in an embodiment of the present application;

[0017] Figure 2 This is a partial cross-sectional structural schematic diagram of a gas analyzer based on the laser principle in an embodiment of the present application;

[0018] Figure 3This is a schematic diagram of the structure of the coolant tank of a gas analyzer based on the laser principle in an embodiment of the present application.

[0019] In: 1. Coolant tank; 2. Fixing sleeve; 3. Rod body; 4. Outer shell; 5. Inner shell; 6. Laser; 7. Laser detection head; 8. First channel; 9. Second channel; 10. Liquid pump; 11. First pipeline; 12. Second pipeline; 13. Refrigerator; 14. Heat dissipation fins; 15. Mounting feet; 16. Mounting holes; 17. Liquid filling port; 18. Air outlet nozzle; 19. Air pump; 20. Wave-shaped heat dissipation fins; 21. Through hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.

[0023] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0024] Example: Reference Figure 1-3 A gas analyzer based on the laser principle is shown, comprising a coolant tank 1, a fixed sleeve 2, a rod body 3, an outer shell 4, an inner shell 5, a laser 6, a liquid extraction pump 10, a refrigerator 13, an air outlet nozzle 18 and an air pump 19. The top of the coolant tank 1 is provided with a fixed sleeve 2 fixedly connected thereto, the fixed sleeve 2 is sleeved with a rod body 3, the top of the rod body 3 is provided with an outer shell 4 fixedly connected thereto and arranged horizontally, the outer shell 4 is provided with an inner shell 5 sleeved thereto, the inner shell 5 is provided with a laser 6 sleeved thereto, the laser 6 comprises a laser detection head 7 of which one end extends to the outside of the outer shell 4, a first channel 8 is enclosed between the outer shell 4 and the inner shell 5, a second channel 9 is enclosed between the inner shell 5 and the outer wall of the laser 6, a liquid extraction pump 10 is fixedly installed inside the coolant tank 1, the output end of the liquid extraction pump 10 is connected with a first pipe 11, the other end of the first pipe 11 is connected with the second channel 9, the coolant The interior of the cooling liquid tank 1 is connected with a second pipe 12, and the other end of the second pipe 12 is connected with the second channel 9. An air pump 19 is fixedly installed at the rear end of the outer shell 4, and the output end of the air pump 19 is connected to the interior of the first channel 8. The other end of the outer shell 4 is provided with an air outlet nozzle 18 connected with the first channel 8, and the air outlet nozzle 18 is inclined toward the laser detection head 7. The cooling liquid inside the cooling liquid tank is extracted by the liquid extraction pump, and the cooling liquid enters the interior of the second channel from the first pipe, and flows back to the interior of the cooling liquid tank from the second pipe at the other end after circulating through the outer wall of the laser. In this process, the heat of the laser is taken away, and air is sent into the first channel through the air pump. The air exchanges heat with the inner shell and takes away part of the cold air. The part of the cold air is ejected from the air outlet nozzle at the end, and the ejected cold air is directed toward the laser detection head, thereby avoiding dust adhesion on the surface of the laser detection head and cooling the laser detection head at the same time, thereby achieving reliable cooling of the laser and ensuring its stable operation.

[0025] By means of the above structure: a refrigerator 13 for cooling the coolant inside the coolant tank 1 is fixedly installed at the bottom end thereof, and a heat dissipation fin 14 is fixedly installed at the side of the coolant tank 1. The coolant is cooled by the refrigerator, so that the circulating coolant can be used to cool the laser to ensure that it works at a relatively stable temperature.

[0026] By means of the above structure: a mounting foot 15 is fixedly installed at the bottom end of the coolant tank 1 to support it, and a mounting hole 16 is opened on the mounting foot 15. Bolts are installed at the mounting hole to fix the device to the ground. The mounting foot supports the coolant tank to facilitate air cooling and heat dissipation of the refrigerator.

[0027] According to the above structure, the top of the coolant tank 1 is provided with a liquid injection port 17 communicating with the interior thereof.

[0028] By means of the above structure: a plurality of wavy heat dissipation fins 20 arranged around the axis of the laser 6 are fixedly mounted on the outer shell of the laser 6, the wavy heat dissipation fins 20 are passed into the interior of the second channel 9, and a through hole 21 is provided on the wavy heat dissipation fin 20. The setting of the through hole facilitates the flow of the coolant inside the second channel. The wavy heat dissipation fins 20 improve the heat exchange effect of the laser, thereby improving the heat dissipation efficiency. A temperature sensor for detecting its temperature is also fixedly mounted on the specific laser, so that the cooling temperature of the refrigerator is controlled by the controller to ensure that the laser works in an environment with a more stable temperature.

[0029] By means of the above structure, the rod body 3 and the fixing sleeve 2 are connected in a damping rotation manner, which makes it easy to adjust the angle after installation.

[0030] With the above structure: the cross section of the second channel 9 is fan-shaped, and the first pipe 11 and the second pipe 12 are respectively distributed at the two ends of the fan-shaped, serving as the liquid inlet end and the liquid outlet end respectively.

[0031] Finally, it should be noted that the above are only preferred embodiments 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas analyzer based on the laser principle, characterized in that: The invention comprises a cooling liquid tank (1), a fixing sleeve (2), a rod body (3), an outer shell (4), an inner shell (5), a laser (6), a liquid extraction pump (10), a refrigerator (13), an air outlet nozzle (18) and an air pump (19); the top of the cooling liquid tank (1) is provided with a fixing sleeve (2) fixedly connected thereto; the fixing sleeve (2) is sleeved with a rod body (3); the top of the rod body (3) is provided with an outer shell (4) fixedly connected thereto and arranged horizontally; the inner part of the outer shell (4) is provided with an inner shell (5) sleeved thereto; the inner part of the inner shell (5) is provided with a laser (6) sleeved thereto; the laser (6) comprises a laser detection head (7) one end of which extends to the outside of the outer shell (4); a first channel (8) is enclosed between the outer shell (4) and the inner shell (5); ), a second channel (9) is enclosed between the inner shell (5) and the outer wall of the laser (6), a liquid pump (10) is fixedly installed inside the coolant tank (1), the output end of the liquid pump (10) is connected to a first pipe (11), the other end of the first pipe (11) is connected to the second channel (9), the interior of the coolant tank (1) is connected to a second pipe (12), the other end of the second pipe (12) is connected to the second channel (9), an air pump (19) is fixedly installed at the rear end of the outer shell (4), the output end of the air pump (19) is connected to the interior of the first channel (8), and the other end of the outer shell (4) is provided with an air outlet nozzle (18) connected to the first channel (8), and the air outlet nozzle (18) is arranged obliquely toward the laser detection head (7).

2. A gas analyzer based on the laser principle according to claim 1, characterized in that: A refrigerator (13) for cooling the coolant inside the coolant tank (1) is fixedly mounted at the bottom end thereof, and heat dissipation fins (14) are fixedly mounted on the side of the coolant tank (1).

3. A gas analyzer based on the laser principle according to claim 1, characterized in that: A mounting foot (15) is fixedly mounted on the bottom end of the coolant tank (1) to support the coolant tank, and a mounting hole (16) is provided on the mounting foot (15).

4. A gas analyzer based on the laser principle according to claim 1, characterized in that: The top end of the cooling liquid tank (1) is provided with a liquid injection port (17) which is in communication with the interior thereof.

5. The gas analyzer based on the laser principle according to claim 1, characterized in that: A plurality of wavy heat dissipation fins (20) arranged around the axis of the laser (6) are fixedly mounted on the outer shell of the laser (6); the wavy heat dissipation fins (20) are passed into the interior of the second channel (9); and through holes (21) are provided on the wavy heat dissipation fins (20).

6. The laser-based gas analyzer according to claim 1, characterized in that: The rod body (3) and the fixing sleeve (2) are connected in a damping rotation manner.

7. The laser-based gas analyzer according to claim 1, characterized in that: The second channel (9) has a fan-shaped cross section, and the first pipe (11) and the second pipe (12) are respectively distributed at two ends of the fan.

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