White pool

Abstract

The invention discloses a White cell which comprises a cell body, a cell body cover plate, a first reflector, a second reflector, a third reflector, an incident window sheet, an emergent window sheet, an incident mirror assembly and an emergent mirror assembly, a mounting hole I and a mounting hole II corresponding to the second reflector and the third reflector are formed in the tank body wall at one end of the tank body, and the angles and positions of the mounting hole I and the mounting hole II meet the requirement of multiple reflection of light beams; the second reflector and the third reflector are respectively mounted in the mounting hole I and the mounting hole II, the first reflector is fixed at the other end in the pool body, and an incident light beam opening and an emergent light beam opening are formed in the pool body wall at the end where the first reflector is located according to the light beam trend and are respectively used for mounting an incident window sheet and an emergent window sheet; an incident mirror assembly and an emergent mirror assembly are correspondingly arranged on the outer sides of the incident window sheet and the emergent window sheet and are used for changing incident and emergent light beams to be horizontal and vertical to the central axis direction of the White cell; and the tank body cover plate seals the upper end of the tank body. The lens mounting and fixing mode is simplified, and the air chamber can be conveniently matched with the infrared spectrometer for application.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, in particular to a White cell. Background Art

[0002] The infrared spectrometer combined with a long optical path gas chamber can monitor a variety of trace gases and is widely used in various gas monitoring scenarios such as confined spaces, air quality, and exhaust emissions.

[0003] Infrared spectrometers used for trace gas detection usually work in the mid-infrared band and are spatial light, so the long optical path gas chamber is suitable for using the White Cell structure. This type of gas chamber structure consists of three concave reflective lenses with the same focal length. The three reflective lenses are fixed at a certain spatial position and angle based on the light reflection theory, so that the light can be reflected multiple times between the lenses to achieve the purpose of increasing the optical path.

[0004] In the prior art, a top screw is often used to fix the reflective lens, and the deflection angle of the reflective lens is adjusted by the top screw. The installation and adjustment are cumbersome, and the incident and outgoing light beam angles of the White cell are uncertain, which is not convenient for use with an infrared spectrometer. Summary of the invention

[0005] In view of this, the present invention provides a White cell, which simplifies the lens installation and fixing method and facilitates the application of the gas chamber in conjunction with the infrared spectrometer.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A White pool comprises a pool body, a pool body cover, a first reflector, a second reflector, a third reflector, an incident window, an exit window, an incident mirror assembly and an exit mirror assembly;

[0008] The pool body wall at one end of the pool body is provided with mounting holes I and II corresponding to the second reflector and the third reflector, and the angles and positions of the mounting holes I and II meet the requirements of multiple reflections of the light beam; the second reflector and the third reflector are respectively installed in the mounting holes I and II, and the first reflector is fixed at the other end of the pool body, and the pool body wall at the end where the first reflector is located is provided with an incident beam port and an exit beam port according to the direction of the light beam, which are respectively used to install an incident window and an exit window; the outer sides of the incident window and the exit window are correspondingly provided with an incident mirror assembly and an exit mirror assembly, which are used to change the incident light beam and the exit light beam to a horizontal direction and a direction perpendicular to the central axis of the White pool; the pool body cover seals the upper end of the pool body.

[0009] Furthermore, air holes are provided on both sides of the cell cover plate, which can be connected to a sampling optical path to extract the gas to be tested.

[0010] Further, the second reflector is installed through a second reflector fixing plate and a sealing ring I, the second reflector fixing plate is fixed in the mounting hole I, the mounting hole I is provided with a sealing ring mounting groove I, the sealing ring I is installed in the sealing ring mounting groove I and the second reflector is pressed onto the second reflector fixing plate, and the second reflector fixing plate faces the outside of the pool body;

[0011] The third reflector is installed through a third reflector fixing plate and a sealing ring II. The third reflector fixing plate is fixed in the mounting hole II. A sealing ring mounting groove II is provided in the mounting hole II. The sealing ring II is installed in the sealing ring mounting groove II and presses the third reflector onto the third reflector fixing plate. The third reflector fixing plate faces the outside of the pool body.

[0012] Furthermore, the first reflector is in a convex shape, a first reflector mounting groove is provided at the inner bottom of the pool body, the first reflector is arranged in the first reflector mounting groove, and both ends of the first reflector are clamped and fixed by columns extending from the inner wall of the pool body; the upper surface of the first reflector is press-fitted and fixed by a first reflector fixing plate, and the first reflector fixing plate is fixed to the columns at both ends of the first reflector.

[0013] Furthermore, the incident window and the exit window are fixed by an annular fixing plate and a sealing ring. The two annular fixing plates are respectively fixed in the incident beam port and the exit beam port of the cell body and face the outside of the cell body; the two sealing rings are respectively fixed on the inner sides of the incident window and the exit window, and the incident window and the exit window are pressed onto the annular fixing plates.

[0014] Further, the incident mirror assembly includes an incident mirror frame, an incident mirror, an O-ring I and an incident mirror fixing plate, the incident mirror frame is provided with a mounting hole III, the incident mirror fixing plate is fixed in the mounting hole III, and the O-ring I presses the incident mirror onto the incident mirror fixing plate;

[0015] The output mirror assembly includes an output mirror frame, an output mirror, an O-ring II and an output mirror fixing plate. The output mirror frame is provided with a mounting hole IV, the output mirror fixing plate is fixed in the mounting hole IV, and the O-ring II presses the output mirror onto the output mirror fixing plate.

[0016] Furthermore, annular bosses are provided on the inner sides of the incident mirror fixing plate and the output mirror fixing plate.

[0017] Beneficial effects:

[0018] 1. The present invention sets mounting holes I and II on the wall of the pool body, whose angles and positions meet the requirements of multiple reflections of the light beam, and directly installs the second reflector and the third reflector without adjusting the angle and position of the reflector, which is simple to assemble and simplifies the lens installation and fixing method; secondly, the present invention realizes the straight-line entry and exit of the light beam through the incident mirror assembly and the output mirror assembly, and has a certain focusing effect, which is convenient for the gas chamber to be used in conjunction with the infrared spectrometer.

[0019] 2. The cell cover of the present invention has air holes on both sides to facilitate connection to the sampling optical path to extract the gas to be tested.

[0020] 3. The incident mirror assembly and the output mirror assembly of the present invention utilize fixing plates and gaskets to fix the lenses, and the fixing assembly has a simple structure and is easy to assemble.

[0021] 4. The inner sides of the incident mirror fixing plate and the exit mirror fixing plate of the present invention are both provided with an annular boss, which is convenient for positioning and has a lighter weight under the condition of the same thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is an exploded view of the present invention.

[0024] Among them, 1-sealing ring I, 2-second reflector, 3-second reflector fixing plate, 4-third reflector fixing plate, 5-third reflector, 6-sealing ring II, 7-cell body, 8-sealing ring III, 9-incident window, 10-incident annular fixing plate, 11-incident mirror frame, 12-O-shaped gasket I, 13-incident mirror, 14-incident mirror fixing plate, 15-exit annular fixing plate, 16-exit window, 17-sealing ring IV, 18-exit mirror fixing plate, 19-exit mirror, 20-O-shaped gasket II, 21-exit mirror frame, 22-first reflector, 23-first reflector fixing plate, 24-cell body cover, 25-cell body sealing ring. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] The present invention provides a White cell, comprising a cell body 7, a cell body cover plate 24, a first reflector 22, a second reflector 2, a third reflector 5, an incident window 9, an exit window 16, an incident mirror assembly and an exit mirror assembly.

[0027] like Figure 1 , Figure 2As shown, a mounting hole I and a mounting hole II corresponding to the second reflector 2 and the third reflector 5 are provided on the pool body wall at one end of the pool body 7, and the angles and positions of the mounting holes I and II meet the requirements of multiple reflections of the light beam; the second reflector 2 and the third reflector 5 are respectively installed in the mounting holes I and II, and the first reflector 22 is fixed at the other end of the pool body 7, and an incident beam port and an outgoing beam port are opened on the pool body wall at the end where the first reflector 22 is located according to the direction of the light beam, which are used to install an incident window 9 and an outgoing window 16 respectively; an incident mirror assembly and an outgoing mirror assembly are correspondingly provided on the outer sides of the incident window 9 and the outgoing window 16, which are used to change the incident light beam and the outgoing light beam to a horizontal direction and perpendicular to the central axis of the White pool; the pool body cover plate 24 seals the upper end of the pool body 7, and a pool body sealing ring 25 is provided between the pool body cover plate 24 and the upper end of the pool body 7, and air holes are opened on both sides of the pool body cover plate 24, which can be connected to the sampling optical path to extract the gas to be measured.

[0028] Thus, the incident light beam is incident on the center of the incident mirror 13 in a direction horizontally and perpendicular to the center axis of the White cell. After being reflected, the light beam enters the White cell through the incident window 9, and is reflected multiple times between the first reflector 22, the second reflector 2, and the third reflector 5 in the cell body 7 according to the light reflection law. Finally, it is emitted from the cell body 7 to the exit mirror 19 through the exit window 16, and the light beam is changed to a direction horizontally and perpendicular to the center axis of the cell body 7 to the detector of the spectrometer.

[0029] Specifically, the second reflector 2 is installed through the second reflector fixing plate 3 and the sealing ring Ⅰ1. The second reflector fixing plate 3 is fixed in the mounting hole Ⅰ. The mounting hole Ⅰ is provided with a sealing ring mounting groove Ⅰ. The sealing ring Ⅰ1 is installed in the sealing ring mounting groove Ⅰ and presses the second reflector 2 onto the second reflector fixing plate 3. The second reflector fixing plate 3 faces the outside of the pool body 7.

[0030] The third reflector 5 is installed through the third reflector fixing plate 4 and the sealing ring Ⅱ6. The third reflector fixing plate 4 is fixed in the mounting hole Ⅱ. The mounting hole Ⅱ is provided with a sealing ring mounting groove Ⅱ. The sealing ring Ⅱ6 is installed in the sealing ring mounting groove Ⅱ and presses the third reflector 5 onto the third reflector fixing plate 4; the third reflector fixing plate 4 faces the outside of the pool body 7.

[0031] The first reflector 22 is convex in shape, and a first reflector mounting groove is provided at the bottom of the pool body 7. The first reflector 22 is arranged in the first reflector mounting groove. Both ends of the first reflector 22 are clamped and fixed by columns extending from the inner wall of the pool body 7; the upper surface of the first reflector 22 is press-fitted and fixed by a first reflector fixing plate 23, and the first reflector fixing plate 23 is fixed to the columns at both ends of the first reflector 22.

[0032] The incident window 9 and the exit window 16 are fixed by an annular fixing plate and a sealing ring, that is, the incident window 9 is fixed by the incident annular fixing plate 10 and the sealing ring III8, and the exit window 16 is fixed by the exit annular fixing plate 15 and the sealing ring IV 17. The incident annular fixing plate 10 is fixed in the incident beam port of the cell body 7 and faces the outside of the cell body 7; the sealing ring III8 is fixed on the inside of the incident window 9, and the incident window 9 is pressed onto the incident annular fixing plate 10.

[0033] The exit annular fixing plate 15 is fixed in the exit beam port of the cell body 7 and faces the outside of the cell body 7 ; the sealing ring IV 17 is fixed on the inner side of the exit window 16 , and the exit window 16 is pressed onto the exit annular fixing plate 15 .

[0034] The incident mirror assembly includes an incident mirror frame 11, an incident mirror 13, an O-ring Ⅰ12 and an incident mirror fixing plate 14. The incident mirror frame 11 is provided with a mounting hole Ⅲ, the incident mirror fixing plate 14 is fixed in the mounting hole Ⅲ, and the O-ring Ⅰ12 presses the incident mirror 13 onto the incident mirror fixing plate 14.

[0035] The output mirror assembly includes an output mirror frame 21, an output mirror 19, an O-ring II 20 and an output mirror fixing plate 18. The output mirror frame 21 is provided with a mounting hole IV, the output mirror fixing plate 18 is fixed in the mounting hole IV, and the O-ring II 20 presses the output mirror 19 onto the output mirror fixing plate 18.

[0036] In another embodiment, an annular boss is disposed on the inner side of the incident mirror fixing plate 14 and the exit mirror fixing plate 18 .

[0037] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. 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 White pool, characterized in that: It includes a cell body, a cell body cover, a first reflector, a second reflector, a third reflector, an incident window, an exit window, an incident mirror assembly and an exit mirror assembly; The pool body wall at one end of the pool body is provided with mounting holes I and II corresponding to the second reflector and the third reflector, and the angles and positions of the mounting holes I and II meet the requirements of multiple reflections of the light beam; the second reflector and the third reflector are respectively installed in the mounting holes I and II, and the first reflector is fixed at the other end of the pool body, and the pool body wall at the end where the first reflector is located is provided with an incident beam port and an exit beam port according to the direction of the light beam, which are respectively used to install an incident window and an exit window; the outer sides of the incident window and the exit window are correspondingly provided with an incident mirror assembly and an exit mirror assembly, which are used to change the incident light beam and the exit light beam to a horizontal direction and a direction perpendicular to the central axis of the White pool; the pool body cover seals the upper end of the pool body.

2. The White Pool according to claim 1, characterized in that: The cell cover is provided with air holes on both sides, which can be connected to a sampling optical path to extract the gas to be tested.

3. The White Pool according to claim 1, characterized in that: The second reflector is installed through a second reflector fixing plate and a sealing ring I. The second reflector fixing plate is fixed in a mounting hole I. A sealing ring mounting groove I is provided in the mounting hole I. The sealing ring I is installed in the sealing ring mounting groove I and the second reflector is pressed onto the second reflector fixing plate. The second reflector fixing plate faces the outside of the pool body. The third reflector is installed through a third reflector fixing plate and a sealing ring II. The third reflector fixing plate is fixed in the mounting hole II. A sealing ring mounting groove II is provided in the mounting hole II. The sealing ring II is installed in the sealing ring mounting groove II and presses the third reflector onto the third reflector fixing plate. The third reflector fixing plate faces the outside of the pool body.

4. The White Pool according to claim 1, characterized in that: The first reflector is convex in shape, a first reflector mounting groove is provided at the bottom of the pool body, the first reflector is arranged in the first reflector mounting groove, and two ends of the first reflector are clamped and fixed by columns extending from the inner wall of the pool body; the upper surface of the first reflector is press-fitted and fixed by a first reflector fixing plate, and the first reflector fixing plate is fixed to the columns at both ends of the first reflector.

5. The White Pool according to claim 1, characterized in that: The incident window and the exit window are both fixed by an annular fixing plate and a sealing ring. The two annular fixing plates are respectively fixed in the incident beam port and the exit beam port of the cell body and face the outside of the cell body. The two sealing rings are respectively fixed on the inner sides of the incident window and the exit window, and the incident window and the exit window are pressed onto the annular fixing plates.

6. The White Pool according to any one of claims 1 to 5, characterized in that: The incident mirror assembly includes an incident mirror frame, an incident mirror, an O-shaped gasket I and an incident mirror fixing plate. The incident mirror frame is provided with a mounting hole III. The incident mirror fixing plate is fixed in the mounting hole III. The O-shaped gasket I presses the incident mirror onto the incident mirror fixing plate. The output mirror assembly includes an output mirror frame, an output mirror, an O-ring II and an output mirror fixing plate. The output mirror frame is provided with a mounting hole IV, the output mirror fixing plate is fixed in the mounting hole IV, and the O-ring II presses the output mirror onto the output mirror fixing plate.

7. The White Pool according to claim 6, characterized in that: The inner sides of the incident mirror fixing plate and the exit mirror fixing plate are both provided with an annular boss.

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