Pumping type laser gas detector

Abstract

The utility model relates to the technical field of gas detection, in particular to a pumping type laser gas detector, which comprises a laser transceiver and a gas pump, the laser transceiver is positioned above the gas pump, the end part of the laser transceiver is connected with an anti-explosion flexible pipe, and the gas inlet end of the gas pump is communicated with a gas inlet hose; the air chamber detection mechanism is mounted at one end of the laser transceiver, and the surface of the air chamber detection mechanism is communicated with the other end of the air inlet hose; according to the pump suction type laser gas detector, gas in the gas chamber shell can be mixed under the action of the mixing assembly and the homogenizing assembly, two strands of inlet gas are initially mixed through the homogenizing assembly, and gas flow entering the gas chamber shell can be uniformly mixed in cooperation with the internal structure of the gas chamber shell; the change of the air pressure on one side of the inner wall of the air chamber shell is reduced, the refraction offset of light is reduced, and the detection precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, and particularly relates to a pump-suction type laser gas detector. Background Art

[0002] The laser gas detection device is based on the principle of spectral absorption. By controlling the device to modulate the current of the laser, the laser emits laser light with a specific wavelength. After passing through the gas monitoring area, it reaches the reflecting surface and is reflected back to the laser detector. If there is a characteristic gas to be detected in the gas area through which the laser passes, the laser will be absorbed by the gas. The higher the concentration of the characteristic gas, the greater the absorption amount. The laser detector will monitor the change in laser intensity and feedback it to the control device for processing. Finally, the signal is output to the display device to display the concentration result.

[0003] After searching the prior art for "pump-suction type laser gas detector" with the publication number "CN205941355U", this device is explosion-proof and safe. However, when the external gas is inhaled into the gas chamber, since the gas is introduced through a relatively narrow air inlet, it will cause uneven air pressure on one side of the inner wall of the gas chamber. During the detection process, it may cause the light to shift and bend, affecting the accuracy of the detection.

[0004] Therefore, a pump-suction type laser gas detector is proposed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pump-suction type laser gas detector to solve the above problems, and improve the problem that uneven air pressure on one side of the inner wall of the gas chamber may cause the light to shift and bend during the detection process, affecting the accuracy of the detection.

[0006] The utility model realizes the above purpose through the following technical solutions. A pump-suction type laser gas detector includes: a laser transceiver and an air pump. The laser transceiver is located above the air pump. An explosion-proof flexible pipe is connected to the end of the laser transceiver. The air inlet end of the air pump is communicated with an air inlet hose. A gas chamber detection mechanism is installed at one end of the laser transceiver, and the surface of the gas chamber detection mechanism is communicated with the other end of the air inlet hose. Among them, the gas chamber detection mechanism includes a mixing component arranged at one end of the laser transceiver. A filtering component is installed on the surface of the mixing component, and a uniform component is arranged inside the filtering component. The uniform component is located inside the mixing component.

[0007] Preferably, the mixing component includes an air chamber housing fixedly connected to one end of the laser transceiver. A second inner conical ring is fixedly connected to the inner wall of the air chamber housing. A first inner conical ring is arranged on the side of the second inner conical ring away from the laser transceiver. A plurality of spiral air guide plates are fixedly connected to the surface of the first inner conical ring, and the spiral air guide plates are fixedly connected to the inner wall of the air chamber housing. The narrow ends of the first inner conical ring and the second inner conical ring face different directions. Since the combination of the first inner conical ring and the spiral air guide plates can cause the air flow to flow here, most of the gas flows along the inner wall of the air chamber housing.

[0008] Preferably, the filtering component includes a fixed sleeve fixedly connected to the surface of the air chamber housing. An annular filter screen is embedded and installed on the surface of the fixed sleeve. A filter layer is fixedly connected to the inner wall of the annular filter screen. Filter rings are respectively arranged at both ends of the filter layer, and the filter rings are fixedly connected between the fixed sleeve and the air chamber housing. The annular filter screen and the filter layer reduce the influence of external impurities on the detection.

[0009] Preferably, the uniform component includes a fixed inner ring arranged inside the fixed sleeve. The fixed inner ring is fixedly connected to the inner wall of the air chamber housing. Connecting pieces are fixedly connected to the inner wall of the fixed inner ring. A diversion and dispersion groove is fixedly connected to the inner wall of the fixed inner ring close to the laser transceiver. The other end of the connecting piece is fixedly connected to a water droplet chamber. A diversion piece is fixedly connected to the surface of the water droplet chamber close to the laser transceiver. The guiding of the water droplet chamber and the diversion and dispersion groove reduces the rotation speed of the air flow, improves the impact on the air intake at the second intake pipe, and assists in the mixing of the two air flows.

[0010] Preferably, a nest is arranged on the side of the filter ring away from the filter layer. A second intake pipe is fixedly connected to the surface of the nest close to the laser transceiver. The air inlet of the second intake pipe is tangent to the inner wall of the air chamber housing.

[0011] Preferably, a first intake pipe is fixedly connected to the surface of the other nest. The inner diameter of the first intake pipe is larger than that of the second intake pipe, dividing the incoming gas into two air flows with different rotation directions and different flow velocities.

[0012] Preferably, a plurality of connecting straight plates are fixedly connected to the inner side of the second inner conical ring, and the connecting straight plates are fixedly connected to the inner wall of the air chamber housing. The function of the plurality of connecting straight plates is to guide the air flow to prevent the mixed gas from continuing to rotate, so as to reduce the change in the air pressure on the side of the gas close to the inner wall of the air chamber housing.

[0013] The beneficial effects of the present utility model are:

[0014] 1. The above-mentioned pump-suction type laser gas detector can mix the gas inside the gas chamber housing under the action of the mixing component and the uniform component. The device initially mixes the two intakes through the uniform component and, in combination with the internal structure of the gas chamber housing, enables the airflow entering the gas chamber housing to be evenly mixed, reducing the change in air pressure on one side of the inner wall of the gas chamber housing, reducing the refraction and deviation of light, and ensuring the detection accuracy.

[0015] 2. By setting up the filtering component, it can perform an auxiliary filtering operation on the gas introduced from the outside under the action of the filtering component. The device reduces the influence of external impurities on the detection through the annular filter screen and the filtering layer, and at the same time divides the incoming gas into two airflows with different rotation directions and different flow velocities, and then mixes them to ensure the uniformity of the airflow. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the present utility model;

[0017] Figure 2 It is a structural schematic diagram of the gas chamber detection mechanism of the present utility model;

[0018] Figure 3 It is a structural schematic diagram of the inside of the gas chamber housing of the present utility model;

[0019] Figure 4 It is a structural schematic diagram of the mixing component of the present utility model;

[0020] Figure 5 It is an exploded cross-sectional view of the uniform component of the present utility model;

[0021] Figure 6 It is a cross-sectional view of the filtering component of the present utility model.

[0022] In the figure: 1. Laser transceiver; 11. Explosion-proof flexible tube; 2. Air pump; 21. Intake hose; 3. Gas chamber detection mechanism; 31. Mixing component; 311. Gas chamber housing; 312. First inner conical ring; 313. Second inner conical ring; 314. Spiral air guide plate; 315. Connecting straight plate; 32. Filtering component; 321. Fixed sleeve; 322. Annular filter screen; 323. First intake pipe; 324. Filtering layer; 325. Filter ring; 326. Nesting; 327. Second intake pipe; 33. Uniform component; 331. Fixed inner ring; 332. Connecting piece; 333. Water droplet chamber; 334. Flow guiding and dispersing groove; 335. Flow guiding piece. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Specifically in implementation: As Figure 1-6 shown, a pump-suction type laser gas detector includes: a laser transceiver 1 and an air pump 2. The laser transceiver 1 is located above the air pump 2. One end of the laser transceiver 1 is connected with an explosion-proof flexible tube 11. The air inlet end of the air pump 2 is communicated with an air inlet hose 21; a gas chamber detection mechanism 3 is installed at one end of the laser transceiver 1, and the surface of the gas chamber detection mechanism 3 is communicated with the other end of the air inlet hose 21; among them, the gas chamber detection mechanism 3 includes a mixing component 31 arranged at one end of the laser transceiver 1. A filtering component 32 is installed on the surface of the mixing component 31, and a uniform component 33 is arranged inside the filtering component 32. The uniform component 33 is located inside the mixing component 31;

[0025] As Figures 1-4 shown, the mixing component 31 includes a gas chamber housing 311 fixedly connected to one end of the laser transceiver 1. The inner wall of the gas chamber housing 311 is fixedly connected with a second inner cone ring 313. A first inner cone ring 312 is arranged on the side of the second inner cone ring 313 away from the laser transceiver 1. A plurality of spiral air guide plates 314 are fixedly connected to the surface of the first inner cone ring 312. The spiral air guide plates 314 are fixedly connected to the inner wall of the gas chamber housing 311. The narrow end facing directions of the first inner cone ring 312 and the second inner cone ring 313 are different. A plurality of connecting straight plates 315 are fixedly connected to the inner side of the second inner cone ring 313. The connecting straight plates 315 are fixedly connected to the inner wall of the gas chamber housing 311;

[0026] Among them, the device drives the air pump 2 to make the gas inside the gas chamber housing 311 enter the gas chamber housing 311 through the filtering component 32 under the action of the air inlet hose 21, and the gas flow direction is towards the air inlet hose 21. Since the combination of the first inner cone ring 312 and the spiral air guide plates 314 can make the air flow to this place, most of the gas flows along the inner wall of the gas chamber housing 311. At this time, the gas is rotated under the guidance of the spiral air guide plates 314 and mixed inside the gas chamber housing 311. Then the air flow continues to flow and is concentrated at the second inner cone ring 313. The air flow is guided through the action of a plurality of connecting straight plates 315 to prevent the mixed gas from continuing to rotate, so as to reduce the change in the air pressure on the side of the gas close to the inner wall of the gas chamber housing 311, reduce the refraction and deviation of light, and ensure the detection accuracy;

[0027] The filtering component 32 includes a fixed sleeve 321 fixedly connected to the surface of the air chamber housing 311. An annular filter screen 322 is embedded on the surface of the fixed sleeve 321. A filter layer 324 is fixedly connected to the inner wall of the annular filter screen 322. Filter rings 325 are respectively arranged at both ends of the filter layer 324. The filter rings 325 are fixedly connected between the fixed sleeve 321 and the air chamber housing 311. A nest 326 is arranged on the side of the filter ring 325 away from the filter layer 324. A second intake pipe 327 is fixedly connected to the surface of the nest 326 close to the laser transceiver 1. A first intake pipe 323 is fixedly connected to the surface of the other nest 326. The inner diameter of the first intake pipe 323 is larger than that of the second intake pipe 327;

[0028] The device sucks external gas into the air chamber housing 311. At this time, under the action of the annular filter screen 322, the influence of external impurities on the inhaled gas is reduced. At the same time, under the action of the annular filter screen 322 and the filter rings 325, a positioning effect on the filter layer 324 is maintained. And under the action of the first intake pipe 323 and the second intake pipe 327, the intake air volume at the second intake pipe 327 near the laser transceiver 1 is relatively lower than that at the first intake pipe 323 away from the laser transceiver 1. And the air inlets of the second intake pipe 327 and the first intake pipe 323 are tangent to the inner wall of the air chamber housing 311. At the same time, the intake directions of the second intake pipe 327 and the first intake pipe 323 are opposite, which can make the incoming gas rotate on the inner wall of the air chamber housing 311. At the same time, the rotation directions of the two intakes of air are different, forming a mixing effect, reducing the situation of uneven gas density and detection error;

[0029] As Figure 3 、 Figure 4 and Figure 5 shown, the uniform component 33 includes a fixed inner ring 331 arranged inside the fixed sleeve 321. The fixed inner ring 331 is fixedly connected to the inner wall of the air chamber housing 311. A connecting piece 332 is fixedly connected to the inner wall of the fixed inner ring 331. A diversion trough 334 is fixedly connected to the inner wall of the fixed inner ring 331 close to the laser transceiver 1. The other end of the connecting piece 332 is fixedly connected to a water droplet bin 333. A diversion piece 335 is fixedly connected to the surface of the water droplet bin 333 close to the laser transceiver 1. Among them, under the action of the first intake pipe 323, the airflow rotates into the air chamber housing 311. After that, the airflow contacts the air chamber housing 311. At this time, the airflow moves from the first intake pipe 323 towards the second intake pipe 327. Then, during the movement, the rotation speed of the airflow is reduced under the guidance of the water droplet bin 333 and the diversion trough 334, improving the impact on the intake air at the second intake pipe 327 and assisting the mixing of the two airflows;

[0030] Since the outer shape of the water droplet chamber 333 is in the shape of a water droplet, the airflow at the second intake pipe 327 rotates relatively fast near the inner wall of the air chamber housing 311 and has a short horizontal movement distance. The airflow passing through the uniform component 33 in the first intake pipe 323 has a reduced rotation speed, but the horizontal movement distance is relatively increased. And this airflow meets the airflow at the second intake pipe 327 closer to the central region of the air chamber housing 311, and the two airflows rotate in different directions, improving the mixing effect of the two airflows and reducing the light deviation situation.

[0031] When the present utility model is in use, an operator drives the air pump 2 to reduce external impurities in the gas annular filter screen 322. The annular filter screen 322 and the filter ring 325 keep the filter layer 324 positioned. The two intake airflows of the second intake pipe 327 and the first intake pipe 323 rotate in different directions to form a mixture. The airflow of the first intake pipe 323 rotates and enters the air chamber housing 311. The water droplet chamber 333 and the guiding of the diversion trough 334 reduce the rotation speed of the airflow, improve the impact on the intake air at the second intake pipe 327, and assist in the mixing of the two airflows. The combined airflow of the first inner conical ring 312 and the spiral air guide plate 314 flows to this place. Most of the gas flows along the inner wall of the air chamber housing 311. After the spiral air guide plate 314 guides the gas to rotate, the refraction and deviation of light are reduced, ensuring the detection accuracy.

[0032] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pump-suction type laser gas detector, characterized in that, Including: A laser transceiver (1) and an air pump (2), the laser transceiver (1) is located above the air pump (2), an explosion-proof flexible tube (11) is connected to the end of the laser transceiver (1), and an intake hose (21) is connected to the intake end of the air pump (2); An air chamber detection mechanism (3), the air chamber detection mechanism (3) is installed at one end of the laser transceiver (1), and the surface of the air chamber detection mechanism (3) is connected to the other end of the intake hose (21); Among them, the air chamber detection mechanism (3) includes a mixing component (31) arranged at one end of the laser transceiver (1), a filtering component (32) is installed on the surface of the mixing component (31), and a uniform component (33) is arranged inside the filtering component (32), and the uniform component (33) is located inside the mixing component (31).

2. The pump suction type laser gas detector according to claim 1, wherein: The mixing component (31) includes an air chamber housing (311) fixedly connected to one end of the laser transceiver (1), a second inner conical ring (313) is fixedly connected to the inner wall of the air chamber housing (311), a first inner conical ring (312) is arranged on the side of the second inner conical ring (313) away from the laser transceiver (1), a plurality of spiral air guide plates (314) are fixedly connected to the surface of the first inner conical ring (312), the spiral air guide plates (314) are fixedly connected to the inner wall of the air chamber housing (311), and the narrow end facing directions of the first inner conical ring (312) and the second inner conical ring (313) are different.

3. The pump suction type laser gas detector according to claim 2, characterized in that: The filtering component (32) includes a fixed sleeve (321) fixedly connected to the surface of the air chamber housing (311), an annular filter screen (322) is embedded and installed on the surface of the fixed sleeve (321), a filter layer (324) is fixedly connected to the inner wall of the annular filter screen (322), filter rings (325) are respectively arranged at both ends of the filter layer (324), and the filter rings (325) are fixedly connected between the fixed sleeve (321) and the air chamber housing (311).

4. The pump suction type laser gas detector according to claim 3, characterized in that: The uniform component (33) includes a fixed inner ring (331) arranged inside the fixed sleeve (321), the fixed inner ring (331) is fixedly connected to the inner wall of the air chamber housing (311), a connecting piece (332) is fixedly connected to the inner wall of the fixed inner ring (331), a diversion and dispersion groove (334) is fixedly connected to the inner wall of the fixed inner ring (331) close to the laser transceiver (1), the other end of the connecting piece (332) is fixedly connected to a water droplet bin (333), and a diversion piece (335) is fixedly connected to the surface of the water droplet bin (333) close to the laser transceiver (1).

5. The pump suction type laser gas detector according to claim 3, wherein: A nest (326) is arranged on the side of the filter ring (325) away from the filter layer (324), and a second intake pipe (327) is fixedly connected to the surface of the nest (326) close to the laser transceiver (1).

6. The pump suction type laser gas detector according to claim 5, wherein: A first intake pipe (323) is fixedly connected to the surface of the other nest (326), and the inner diameter of the first intake pipe (323) is larger than the inner diameter of the second intake pipe (327).

7. The pump suction type laser gas detector according to claim 2, characterized in that: A plurality of connecting straight plates (315) are fixedly connected to the inner side of the second inner conical ring (313), and the connecting straight plates (315) are fixedly connected to the inner wall of the air chamber housing (311).

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