阅读说明：本技术 一种气体分析仪用可增加光程长度的光通道及其工作方法 (Optical channel capable of increasing optical path length for gas analyzer and working method thereof ) 是由 薛方明 陈锋 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种气体分析仪用可增加光程长度的光通道及其工作方法,针对现有的气体分析仪光程长度短的问题,现提出如下方案,其包括底座,底座的上端通过第一支架固定安装有照射灯,底座的上端通过多个第二支架固定安装有通道主体,底座的上端通过轴承座转动安装有螺杆,螺杆的顶端固定安装有安装轴,安装轴上可拆卸式插接卡紧固定安装有若干个滤波片,滤波片位于照射灯与通道主体之间,通道主体的左端固定连接有进光口透明玻璃片,通道主体的右端固定连接有出光口透明玻璃片,通道主体的下端且靠近进光口透明玻璃片处固定安装有进气管,本发明能够增加光程,便于转换滤波片,且操作简单方便,制造成本低,适合推广使用。(The invention discloses an optical channel capable of increasing the optical path length for a gas analyzer and a working method thereof, aiming at the problem of short optical path length of the existing gas analyzer, the invention provides a scheme which comprises a base, wherein the upper end of the base is fixedly provided with a lamp through a first bracket, the upper end of the base is fixedly provided with a channel main body through a plurality of second brackets, the upper end of the base is rotatably provided with a screw rod through a bearing seat, the top end of the screw rod is fixedly provided with a mounting shaft, the mounting shaft is detachably inserted, clamped and fixedly provided with a plurality of filter plates, the filter plates are positioned between the lamp and the channel main body, the left end of the channel main body is fixedly connected with a light inlet transparent glass sheet, the right end of the channel main body is fixedly connected with a light outlet transparent glass sheet, the lower end of the channel main body and the position close to the light inlet, the filter is convenient to convert, simple and convenient to operate, low in manufacturing cost and suitable for popularization and use.)

1. The light channel capable of increasing the optical path length for the gas analyzer comprises a base (9) and is characterized in that a lamp (2) is fixedly mounted at the upper end of the base (9) through a first support (3), a channel main body (11) is fixedly mounted at the upper end of the base (9) through a plurality of second supports (10), a screw (7) is rotatably mounted at the upper end of the base (9) through a bearing seat (6), a mounting shaft (4) is fixedly mounted at the top end of the screw (7), a plurality of filter plates (1) are detachably mounted on the mounting shaft (4) in a splicing and clamping manner, the filter plates (1) are located between the lamp (2) and the channel main body (11), a light inlet transparent glass sheet (14) is fixedly connected at the left end of the channel main body (11), and a light outlet transparent glass sheet (12) is fixedly connected at the right end of the channel main body (11), an air inlet pipe (8) is fixedly arranged at the lower end of the channel main body (11) and close to the light inlet transparent glass sheet (14), an air outlet pipe (13) is fixedly arranged at the upper end of the channel main body (11) and positioned at the light outlet transparent glass sheet (12), and the air inlet pipe (8) and the air outlet pipe (13) are communicated with the channel main body (11);

the channel main body (11) comprises two sealing side plates (111) and two reflecting plates (112), wherein the two sealing side plates (111) are fixedly arranged between the upper end and the lower end of each sealing side plate (111).

2. The optical channel capable of increasing the optical path length for a gas analyzer according to claim 1, wherein two of the reflective plates (112) are formed by sequentially splicing and fixing a plurality of total reflection prisms (1121), and a sealing ring is disposed between two adjacent total reflection prisms (1121).

3. The optical channel capable of increasing the optical path length for the gas analyzer according to claim 2, wherein the included angle between two adjacent total reflection prisms (1121) is ninety degrees.

4. The optical path for gas analyzer capable of increasing the optical path length according to claim 1, wherein the screw (7) is threadedly mounted with a locking cap (5).

5. The optical path with increased optical path length for gas analyzer according to claim 1, wherein a handle (15) is fixedly installed on the upper end of the installation shaft (4).

6. A method of operating an optical channel for a gas analyzer with an increased optical path length according to any of claims 1-5, characterized in that the procedure is as follows: firstly, gas is led into a channel main body (11) through an air inlet pipe (8), a worker twists a locking cap (5), the locking cap (5) is separated from a bearing seat (6), then a mounting shaft (4) is rotated through a handle (15), the worker rotates a filter (1) corresponding to the gas according to the gas to be detected to the middle of a lamp (2) and a light inlet transparent glass sheet (14), then the locking cap (5) is screwed, then the lamp (2) is started, the lamp (2) works to emit light into the filter (1), the filter (1) filters the light to the required wavelength, the light is emitted into the channel main body (11) through the light inlet transparent glass sheet (14) and is totally reflected through a plurality of total reflection prisms (1121), further, the optical path of the light in the channel main body (11) is increased, and the light is emitted out from the light outlet transparent glass sheet (12), obtaining the light attenuated by the gas, and finally testing the attenuated light.

Technical Field

The invention relates to the field of optical instruments, in particular to an optical channel capable of increasing optical path length for a gas analyzer and a working method thereof.

Background

The ultraviolet analyzer generally comprises a light source, a light source collimation device, an optical sample cell, a detector and a display device. The optical gas absorption cell is one of optical sample cells, is mainly used for bearing sample gas to be measured, and arranges a light path through which gas needs to pass through by an optical element arranged on the gas cell. And, according to different light sources, can be divided into infrared optical gas absorption cell and ultraviolet optical gas absorption cell. In the existing ultraviolet analyzer, a gas absorption cell is mostly a straight-through type or a primary reflection type gas absorption cell. With the flow-through gas absorption cell, the length of the flow-through gas absorption cell is limited due to the limitation of the external dimensions, resulting in a short optical path. In order to increase the optical path length, the length of the gas absorption cell is increased, which causes difficulty when the gas absorption cell is applied to an online or portable ultraviolet analyzer with limited integral volume; further, an optical channel for a gas analyzer is provided, which can increase the optical path length.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned deficiencies in the prior art, and provides an optical channel capable of increasing the optical path length for a gas analyzer and a working method thereof, so as to solve the problem of short optical path length of the existing gas analyzer.

The technical scheme adopted by the invention for solving the problems is as follows: an optical channel capable of increasing optical path length for a gas analyzer comprises a base and is characterized in that a lamp is fixedly mounted at the upper end of the base through a first support, a channel main body is fixedly mounted at the upper end of the base through a plurality of second supports, a screw rod is rotatably mounted at the upper end of the base through a bearing seat, a mounting shaft is fixedly mounted at the top end of the screw rod, a plurality of filter plates are detachably inserted and clamped and fixedly mounted on the mounting shaft and are positioned between the lamp and the channel main body, a light inlet transparent glass sheet is fixedly connected at the left end of the channel main body, a light outlet transparent glass sheet is fixedly connected at the right end of the channel main body, an air inlet pipe is fixedly mounted at the lower end of the channel main body and close to the light inlet transparent glass sheet, an air outlet pipe is fixedly mounted at the upper end of the channel main body and positioned at the, the air inlet pipe and the air outlet pipe are communicated with the channel main body;

the channel main body comprises two sealing side plates and two reflecting plates, wherein the two reflecting plates are fixedly arranged between the upper end and the lower end of each sealing side plate.

Preferably, the two reflecting plates are formed by sequentially splicing and fixing a plurality of total reflection prisms, and a sealing ring is arranged between every two adjacent total reflection prisms.

Preferably, the included angle between two adjacent total reflection prisms is ninety degrees.

Preferably, the screw is provided with a locking cap in a threaded manner.

Preferably, a handle is fixedly mounted at the upper end of the mounting shaft.

The working method of the optical channel capable of increasing the optical path length for the gas analyzer is characterized by comprising the following steps of: firstly, gas is led into a channel main body through an air inlet pipe, a worker twists a locking cap, the locking cap is separated from a bearing seat, then a mounting shaft is rotated through a handle, the worker rotates a filter plate corresponding to the gas according to the gas to be detected to the middle of an irradiation lamp and a light inlet transparent glass plate, then the locking cap is screwed down, then the irradiation lamp is started, the irradiation lamp works to emit light into the filter plate, the filter plate filters the light to the required wavelength, the light is emitted into the channel main body through the light inlet transparent glass plate and is totally reflected through a plurality of total reflection prisms, further, the optical path of the light in the channel main body is increased, after the light is emitted from the light outlet transparent glass plate, the light attenuated by the gas is obtained, and finally, the attenuated light is tested.

Compared with the prior art, the invention has the following advantages and effects: the total reflection prisms, the sealing rings and the sealing side plates are matched with one another, so that the optical path of the gas absorption pool is increased, the area of the space occupied by the gas absorption pool is obviously reduced, and the manufacturing cost is reduced; through setting up installation axle, locking cap, bearing frame, screw rod and the setting of mutually supporting of handle, this design is convenient for carry out the fast switch to the filter.

The invention can increase the optical distance, is convenient for converting the filter, has simple and convenient operation and low manufacturing cost, and is suitable for popularization and use.

Drawings

FIG. 1 is a schematic diagram of an optical channel for a gas analyzer with an increased optical path length according to an embodiment of the present invention.

Figure 2 is a top view of a channel body in an embodiment of the invention.

Figure 3 is a cross-sectional view of a channel body in an embodiment of the invention.

Fig. 4 is a schematic structural diagram of a total reflection prism in an embodiment of the present invention.

Fig. 5 is a partial structural plan view of the left end of fig. 1.

In the figure: the device comprises a filter plate 1, a radiation lamp 2, a first support 3, a mounting shaft 4, a locking cap 5, a bearing seat 6, a screw 7, an air inlet pipe 8, a base 9, a second support 10, a channel main body 11, a light outlet transparent glass sheet 12, an air outlet pipe 13, a light inlet transparent glass sheet 14, a handle 15, a sealing side plate 111, a reflecting plate 112 and a total reflection prism 1121.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Referring to fig. 1-5, the optical channel for increasing the optical path length for a gas analyzer in this embodiment includes a base 9, a lamp 2 is fixedly mounted on the upper end of the base 9 through a first bracket 3, a channel main body 11 is fixedly mounted on the upper end of the base 9 through a plurality of second brackets 10, a screw 7 is rotatably mounted on the upper end of the base 9 through a bearing seat 6, a mounting shaft 4 is fixedly mounted on the top end of the screw 7, four filters 1 are detachably inserted and clamped and fixedly mounted on the mounting shaft 4, the filter 1 is convenient to detach and replace, the filter 1 is located between the lamp 2 and the channel main body 11, a light inlet transparent glass sheet 14 is fixedly connected to the left end of the channel main body 11, a light outlet transparent glass sheet 12 is fixedly connected to the right end of the channel main body 11, an air inlet pipe 8 is fixedly mounted at the lower end of the channel main body 11 and near, the upper end of the channel main body 11 and the position, located at the light outlet, of the transparent glass sheet 12 are fixedly provided with the air outlet pipe 13, and the air inlet pipe 8 and the air outlet pipe 13 are both communicated with the channel main body 11, so that air can enter and exit conveniently during testing.

The channel body 11 includes two sealing side plates 111 and two reflecting plates 112, and the two sealing side plates 111 are fixedly mounted between the upper and lower ends of the two sealing side plates 111.

The two reflecting plates 112 are formed by sequentially splicing and fixing the plurality of total reflection prisms 1121, and a sealing ring is arranged between two adjacent total reflection prisms 1121, so that the sealing performance of the joint of the total reflection prisms 1121 can be improved by the design, further, gas leakage is prevented, the detection accuracy is influenced, and the included angle between the two adjacent total reflection prisms 1121 is ninety degrees, so that light can be refracted well; screw thread installation has locking cap 5 on screw rod 7, and this design can lock screw rod 7, and then has improved the precision that detects, and the upper end fixed mounting of installation axle 4 has handle 15, and this design is convenient for the staff to install axle 4 and rotates, and then is convenient for change filter 1.

The implementation process comprises the following steps: firstly, gas is led into a channel main body 11 through an air inlet pipe 8, a worker twists a locking cap 5 to separate the locking cap 5 from a bearing seat 6, then a mounting shaft 4 is rotated through a handle 15, the worker rotates a filter plate 1 corresponding to the gas according to the gas to be detected to the middle of an irradiation lamp 2 and a light inlet transparent glass plate 14, then the locking cap 5 is screwed down, then the irradiation lamp 2 is started, the irradiation lamp 2 works to emit light into the filter plate 1, the filter plate 1 can filter the light to the required wavelength, the light is emitted into the channel main body 11 through the light inlet transparent glass plate 14 and is totally reflected through a plurality of total reflection prisms 1121, so that the optical path of the light in the channel main body 11 is increased, after the light exits from the light outlet transparent glass plate 12, the light attenuated by the gas can be obtained, and the attenuated light can be tested, the invention can provide light rays meeting the requirements for testing.

The total reflection prisms 1121, the sealing rings and the sealing side plate 111 are matched with each other, so that the optical path of the gas absorption pool is increased, the area of the space occupied by the gas absorption pool is obviously reduced, and the manufacturing cost is reduced; through installation axle 4, locking cap 5, bearing frame 6, screw rod 7 and the setting of mutually supporting of handle 15, this design is convenient for carry out the fast switch to filter 1. The invention can increase the optical distance, is convenient for converting the filter plate 1, has simple and convenient operation and low manufacturing cost, and is suitable for popularization and use.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.