Gas detection device

Abstract

The invention discloses a gas detection device. According to the technical scheme, the gas detection device is characterized by comprising a fixing plate; the air chamber is fixedly connected to the top of the fixing plate, and the two ends of the air chamber are open; the two sets of lenses are arranged at the two ends of the air chamber respectively so as to seal the two ends of the air chamber, and the lenses are detachably connected to the top of the fixing plate; the two groups of reflectors are arranged, and the two groups of reflectors are respectively arranged on the sides, deviating from each other, of the two groups of lenses; through the arrangement of the lens, unclean gas does not make contact with the reflector but can only make contact with the lens, and after the lens is polluted, due to the detachable connection of the lens, the lens can be conveniently detached to be cleaned, so that the cleaning operation is convenient and rapid.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and more particularly to a gas detection device. Background Art

[0002] Gas detection devices are usually instruments used to detect gases such as SO2, NO, and NO2. Generally speaking, the instrument includes a gas chamber, a light source, and a spectrometer. An inlet nozzle and an outlet nozzle are installed in the gas chamber, reflectors are installed at both ends of the gas chamber, and a Y-type optical fiber is installed at one end of the gas chamber. When in use, the light source serves as the light transmitting end, and the spectrometer serves as the receiving end. The light source sends light into the gas chamber through the optical fiber. After multiple reflections by the reflector in the gas chamber, the light enters the spectrometer through another optical fiber, and the spectrometer analyzes the type and concentration of the gas.

[0003] In the existing gas detection device, the lens is fixed in the air chamber. In the daily use process, it is easy for unclean gas to enter the air chamber due to incomplete filtration of the sampled flue gas and the failure to replace the filter element in time after it is contaminated. The unclean gas entering the air chamber can easily contaminate the lens, thereby affecting the detection data or even making it impossible to detect. In the prior art, when encountering the above problem and needing to clean the lens, it is necessary to remove the entire air chamber from the instrument, and then use a special cleaning agent to clean the lens, which makes the cleaning operation cumbersome and inconvenient. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a gas detection device, which, through the setting of a lens, prevents unclean gas from contacting the reflector but can only contact the lens, and after the lens is contaminated, the detachable connection of the lens facilitates the removal of the lens for cleaning, making the cleaning operation convenient and quick.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a gas detection device, comprising a fixing plate; An air chamber, wherein the air chamber is fixedly connected to the top of the fixed plate, and both ends of the air chamber are open; Lenses, wherein the lenses are provided in two groups, the two groups of lenses are respectively provided at both ends of the air chamber to seal the two ends of the air chamber, and the lenses are detachably connected to the top of the fixing plate; and a reflector, wherein the reflector is provided in two groups, and the two groups of reflectors are respectively arranged on the sides of the two groups of lenses which are away from each other.

[0006] The present invention is further configured to include a mirror box, each group of lenses corresponds to a mirror box, and the lenses of the same group are fixed on the corresponding mirror box.

[0007] The present invention is further configured to include a dust cover, each group of reflectors corresponds to a dust cover, and the reflectors in the same group are fixed on the corresponding dust covers.

[0008] The present invention is further configured as follows: the dust cover is connected to the dust cover by means of a stepped screw that passes through the dust cover and is threadedly connected to the air chamber, and the mirror box is arranged between the dust cover and the air chamber; A spring acting on the dust cover is disposed on the outer sleeve of the step screw, and the spring pushes the dust cover by its own elastic force to press the mirror box onto the air chamber.

[0009] The present invention is further configured such that: a sealing ring is provided on both the side of the mirror box connected to the air chamber and the side connected to the dust cover.

[0010] The present invention is further configured such that a sealing ring is provided on the side of the dust cover in contact with the fixing plate.

[0011] The present invention is further configured as follows: connecting blocks extending toward the air chamber and located on both sides of the mirror box are fixedly connected on both sides of the dust cover, the step screws pass through the connecting blocks, and an inspection port is formed between the connecting blocks and the mirror box.

[0012] The present invention is further configured to include: a light source, wherein the light source is arranged at one end of the fixing plate; and a spectrometer, wherein the spectrometer and the light source are arranged at the same end of the fixing plate.

[0013] The present invention is further configured as follows: two reflectors are arranged in the dust cover far away from the light source, namely the first reflector and the third reflector, and a reflector is arranged in the dust cover close to the light source, namely the second reflector; The light emitted by the light source first enters the first reflector, enters the second reflector after being reflected by the first reflector, enters the third reflector after being reflected by the second reflector, and then enters the spectrometer after being reflected by the third reflector.

[0014] The present invention is further configured as follows: three lenses are arranged in the mirror box close to the light source, namely the first lens, the second lens and the third lens, and two lenses are arranged in the mirror box far from the light source, namely the fourth lens and the fifth lens; The first lens allows the light emitted by the light source to pass through, the second lens allows the light reflected by the first reflector toward the second reflector and the light reflected by the second reflector toward the third reflector to pass through, and the third lens allows the light reflected by the third reflector toward the spectrometer to pass through; the fourth lens allows the light emitted by the light source and the light reflected by the first reflector toward the second reflector to pass through, and the fifth lens allows the light reflected by the second reflector toward the third reflector and the light reflected by the third reflector toward the spectrometer to pass through.

[0015] In summary, the present invention has the following beneficial effects compared with the prior art: the present invention, through the setting of the lens, ensures that unclean gas will not contact the reflector but can only contact the lens, and after the lens is contaminated, the detachable connection of the lens makes it easy to disassemble the lens for cleaning, making the cleaning operation convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of an embodiment; Figure 2 is a schematic diagram of an air chamber, a mirror box and a dust cover of an embodiment; Figure 3 for Figure 2 A magnified schematic diagram of part A; Figure 4 This is a schematic diagram showing the embodiment of the mirror box being disassembled from between the air chamber and the dust cover; Figure 5 The diagram is a schematic diagram showing the arrangement of reflectors according to an embodiment.

[0017] In the figure: 1. fixing plate; 2. air chamber; 3. dust cover; 31. first reflector; 32. second reflector; 33. third reflector; 4. mirror box; 41. first lens; 42. second lens; 43. third lens; 44. fourth lens; 45. fifth lens; 5. light source; 6. spectrometer; 7. connecting block; 71. inspection port; 8. step screw; 9. handle. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0019] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0020] Embodiment: A gas detection device, see attached Figure 1 -Attached Figure 5, including a fixing plate 1, an air chamber 2, a lens and a reflector; the air chamber 2 is fixedly connected to the top of the fixing plate 1, and the two ends of the air chamber 2 are open; the lens is provided in two groups, and the two groups of lenses are respectively provided at the two ends of the air chamber 2 to close the two ends of the air chamber 2, and the lens is detachably connected to the top of the fixing plate 1; the reflector is provided in two groups, and the two groups of reflectors are respectively provided on the sides of the two groups of lenses that are away from each other. The air chamber 2 is connected with an air inlet nozzle and an air outlet nozzle for sending gas into and out of the air chamber 2.

[0021] Through the arrangement of the lens, unclean gas will not contact the reflector but can only contact the lens, and after the lens is contaminated, the detachable connection of the lens facilitates the removal of the lens for cleaning, making the cleaning operation convenient and quick.

[0022] Specifically, the present embodiment further includes a mirror box 4, each group of lenses corresponds to a mirror box 4, the lenses of the same group are fixed on the corresponding mirror box 4, and the mirror box 4 is detachably connected to the fixing plate 1. Through the setting of the mirror box 4, it is convenient to disassemble a group of lenses as a whole.

[0023] Specifically, the present embodiment further includes a dust cover 3 , each group of reflectors corresponds to one dust cover 3 , and the reflectors in the same group are fixed on the corresponding dust cover 3 .

[0024] Specifically, the dust cover 3 is connected to the dust cover 3 by a step screw 8 that passes through the dust cover 3 and is threadedly connected to the air chamber 2, and the mirror box 4 is arranged between the dust cover 3 and the air chamber 2; a spring acting on the dust cover 3 is arranged on the outer sleeve of the step screw 8, and the spring pushes the dust cover 3 through its own elastic force to press the mirror box 4 against the air chamber 2.

[0025] Under the action of the spring on the step screw 8, the dust cover 3 can be pressed onto the mirror box 4 and then onto the air chamber 2, thereby fixing the mirror box 4 on the fixed plate 1; when the mirror box 4 needs to be disassembled, it is also necessary to pull the dust cover 3 to squeeze the spring, thereby relaxing the pressure on the mirror box 4, so that the mirror box 4 can be removed from between the air chamber 2 and the dust cover 3, thereby facilitating the cleaning of the lens.

[0026] Specifically, a handle 9 is fixedly connected to the mirror box 4 . The mirror box 4 can be more conveniently drawn out from between the air chamber 2 and the dust cover 3 by the arrangement of the handle 9 .

[0027] Specifically, a sealing ring is provided on one side of the mirror box 4 connected to the air chamber 2 and the other side connected to the dust cover 3. By providing the sealing ring, the gas in the air chamber 2 can be prevented from leaking out.

[0028] Specifically, a sealing ring is provided on the side of the dust cover 3 that contacts the fixing plate 1 .

[0029] Specifically, the two sides of the dust cover 3 are fixedly connected with connecting blocks 7 extending toward the air chamber 2 and respectively located on the two sides of the mirror box 4, the step screws 8 pass through the connecting blocks 7, and an inspection port 71 is formed between the connecting blocks 7 and the mirror box 4. The provision of the inspection port 71 facilitates inserting a tool into the inspection port 71 when disassembling the mirror box 4 so as to pry the dust cover 3 to move and release the pressure on the mirror box 4.

[0030] Specifically, the present embodiment further includes a light source 5 and a spectrometer 6, wherein the light source 5 is disposed at one end of the fixing plate 1; the spectrometer 6 and the light source 5 are disposed at the same end of the fixing plate 1. The light emitted by the light source 5 passes through the dust cover 3 and enters the air chamber 2, and is emitted into the spectrometer 6 after multiple reflections by two sets of reflectors.

[0031] The present embodiment omits the setting of optical fiber because when setting the optical fiber, the optical fiber line is mostly exposed to the outside, and the vibration received during use will cause the detection data to be shifted, and the optical fiber is expensive, which increases the production cost of the device. However, the present embodiment shortens the distance between the light source 5 and the air chamber 2, and directly emits light into the air chamber 2 through the light source 5, so there is no need to consider the impact of the shift on the data and reduces the production cost.

[0032] Specifically, two reflectors are provided in the dust cover 3 far away from the light source 5, namely the first reflector 31 and the third reflector 33, and a reflector is provided in the dust cover 3 close to the light source 5, which is set as the second reflector 32; the light emitted by the light source 5 first enters the first reflector 31, enters the second reflector 32 after being reflected by the first reflector 31, enters the third reflector 33 after being reflected by the second reflector 32, and then enters the spectrometer 6 after being reflected by the third reflector 33.

[0033] Specifically, two light-transmitting parts are provided on the dust cover 3 near the light source 5, one light-transmitting part corresponds to the light source 5 so that the light source 5 passes through the light-transmitting part to enter the air chamber 2, and the other light-transmitting part corresponds to the spectrometer 6 so that the gas in the air chamber 2 passes through the light-transmitting part to be incident on the spectrometer 6.

[0034] Specifically, three lenses are arranged in the mirror box 4 close to the light source 5, namely, a first lens 41, a second lens 42 and a third lens 43, and two lenses are arranged in the mirror box 4 far from the light source 5, namely, a fourth lens 44 and a fifth lens 45; The first lens 41 allows the light emitted by the light source 5 to pass through, the second lens 42 allows the light reflected by the first reflector 31 toward the second reflector 32 and the light reflected by the second reflector 32 toward the third reflector 33 to pass through, and the third lens 43 allows the light reflected by the third reflector 33 toward the spectrometer 6 to pass through; the fourth lens 44 allows the light emitted by the light source 5 and the light reflected by the first reflector 31 toward the second reflector 32 to pass through, and the fifth lens 45 allows the light reflected by the second reflector 32 toward the third reflector 33 and the light reflected by the third reflector 33 toward the spectrometer 6 to pass through.

[0035] Specifically, in this embodiment, the light source 5 is configured as a tritium lamp.

[0036] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A gas detection device, characterized in that: It comprises a fixing plate (1); An air chamber (2), wherein the air chamber (2) is fixedly connected to the top of the fixed plate (1), and both ends of the air chamber (2) are open; Lenses, wherein the lenses are provided in two groups, the two groups of lenses are respectively provided at two ends of the air chamber (2) to seal the two ends of the air chamber (2), and the lenses are detachably connected to the top of the fixing plate (1); and a reflector, wherein the reflector is provided in two groups, and the two groups of reflectors are respectively arranged on the sides of the two groups of lenses which are away from each other.

2. A gas detection device according to claim 1, characterized in that: It also comprises a mirror box (4), each group of lenses corresponds to a mirror box (4), and the lenses of the same group are fixed on the corresponding mirror box (4).

3. A gas detection device according to claim 2, characterized in that: It also includes a dust cover (3), each group of reflectors corresponds to one dust cover (3), and the reflectors in the same group are fixed on the corresponding dust cover (3).

4. A gas detection device according to claim 3, characterized in that: The dust cover (3) is connected to the dust cover (3) by means of a stepped screw (8) which passes through the dust cover (3) and is threadedly connected to the air chamber (2), and the mirror box (4) is arranged between the dust cover (3) and the air chamber (2); The stepped screw (8) is provided with a spring acting on the dust cover (3). The spring pushes the dust cover (3) by its own elastic force to press the mirror box (4) onto the air chamber (2).

5. A gas detection device according to claim 4, characterized in that: The mirror box (4) is provided with sealing rings on the side connected to the air chamber (2) and the side connected to the dust cover (3).

6. A gas detection device according to claim 5, characterized in that: A sealing ring is provided on the side of the dust cover (3) that contacts the fixing plate (1).

7. A gas detection device according to claim 6, characterized in that: Connecting blocks (7) extending toward the air chamber (2) and located respectively on both sides of the mirror box (4) are fixedly connected to the two sides of the dust cover (3); the step screws (8) pass through the connecting blocks (7); and an inspection port (71) is formed between the connecting blocks (7) and the mirror box (4).

8. A gas detection device according to claim 7, characterized in that: It also includes a light source (5), wherein the light source (5) is arranged at one end of the fixing plate (1); and a spectrometer (6), wherein the spectrometer (6) and the light source (5) are arranged at the same end of the fixing plate (1).

9. A gas detection device according to claim 8, characterized in that: Two reflectors are arranged in the dust cover (3) far from the light source (5), namely a first reflector (31) and a third reflector (33); and a reflector is arranged in the dust cover (3) close to the light source (5), namely a second reflector (32); The light emitted by the light source (5) first enters the first reflector (31), enters the second reflector (32) after being reflected by the first reflector (31), enters the third reflector (33) after being reflected by the second reflector (32), and then enters the spectrometer (6) after being reflected by the third reflector (33).

10. A gas detection device according to claim 8, characterized in that: Three lenses are arranged in the mirror box (4) close to the light source (5), namely a first lens (41), a second lens (42) and a third lens (43), and two lenses are arranged in the mirror box (4) far from the light source (5), namely a fourth lens (44) and a fifth lens (45); The first lens (41) allows light emitted by the light source (5) to pass through; the second lens (42) allows light reflected by the first reflector (31) toward the second reflector (32) and light reflected by the second reflector (32) toward the third reflector (33) to pass through; the third lens (43) allows light reflected by the third reflector (33) toward the spectrometer (6) to pass through; the fourth lens (44) allows light emitted by the light source (5) and light reflected by the first reflector (31) toward the second reflector (32) to pass through; and the fifth lens (45) allows light reflected by the second reflector (32) toward the third reflector (33) and light reflected by the third reflector (33) toward the spectrometer (6) to pass through.

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