Coal spectrum acquisition device and coal detection system

Abstract

The utility model provides a coal spectrum collection device and a coal detection system.The coal spectrum collection device comprises a shell (4), a light source (1), a diaphragm (5) and an optical fiber (3), the light source (1), the diaphragm (5) and the optical fiber (3) are arranged in the shell (4), the light source (1) is located on the inlet side of the diaphragm (5) and faces the inlet of the shell (4), and the optical fiber (3) is located on the outlet side of the diaphragm (5). According to the technical scheme, the diaphragm can prevent stray light from entering the optical fiber, it is guaranteed that the optical fiber collects more effective optical signals, and the accuracy of spectral analysis is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal spectrum analysis, and in particular to a coal spectrum acquisition device and a coal detection system. Background Art

[0002] Coal composition analysis and measurement play a very important role in the production process of power, metallurgy, chemical and other products. For thermal power plants and coking plants with large coal demand, inferior coal and coal gangue are often found in the inspection of incoming coal. Due to the limited sampling volume of traditional sampling and analysis methods, it is difficult to effectively find the problem, which causes great losses to users. In the production process of thermal power plants, the quality of incoming coal is a key parameter affecting the safe and economical operation of boilers. Traditional analysis methods lag behind production needs due to their slow analysis speed. In the case of inferior coal and large fluctuations, not only is the boiler operating efficiency low, but it is also prone to shutdowns, flameouts and other accidents, which seriously affect the safe operation of thermal power plants.

[0003] In the prior art, the quality of coal is detected by analyzing the reflected light spectrum of coal. However, due to the low reflectivity of coal, there are few real effective signals and it is easily affected by stray light, which reduces the accuracy of spectral analysis. Utility Model Content

[0004] A technical problem to be solved by the present disclosure is to reduce the influence of stray light on coal spectrum analysis.

[0005] To solve the above technical problems, an embodiment of the present disclosure provides a spectral collection device for coal, which includes a shell, a light source, an aperture and an optical fiber arranged in the shell, the light source is located on the entrance side of the aperture and faces the entrance of the shell, and the optical fiber is located on the exit side of the aperture.

[0006] In some embodiments, the stop is an aperture stop.

[0007] In some embodiments, a plurality of the apertures are included, and the apertures of the plurality of apertures decrease sequentially along the direction of the light path.

[0008] In some embodiments, the aperture of the diaphragm is adjustable.

[0009] In some embodiments, the optical fiber extends toward a central hole of the aperture.

[0010] In some embodiments, a converging lens is disposed at one end of the optical fiber facing the aperture.

[0011] In some embodiments, two light sources are included that are symmetrically arranged about a central axis of the aperture.

[0012] In some embodiments, the light source is a halogen lamp.

[0013] In some embodiments, a photoelectric sensor is further included at the exit of the housing.

[0014] In some embodiments, the inner surface of the housing is provided with a low reflectivity coating.

[0015] On the other hand, the present solution provides a coal detection system, wherein the coal detection system includes the coal spectrum acquisition device described in the above solution.

[0016] Through the above technical solution, the aperture can block stray light from entering the optical fiber, ensuring that the optical fiber collects more effective light signals and improving the accuracy of spectral analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the coal spectrum collection device disclosed in the embodiment of the present disclosure.

[0019] Description of reference numerals:

[0020] 1-light source, 2-photoelectric sensor, 3-optical fiber, 4-housing, 5-aperture, 6-coal, 7-conveyor belt. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0022] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0023] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply 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. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0024] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0025] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0026] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0028] The present scheme provides a spectral acquisition device for coal, which includes a shell 4, a light source 1, an aperture 5 and an optical fiber 3 arranged in the shell 4, wherein the light source 1 is located on the entrance side of the aperture 5 and faces the entrance of the shell 4, and the optical fiber 3 is located on the exit side of the aperture 5.

[0029] The light source 1 is directed toward the entrance of the shell 4 to irradiate the emitted light onto the coal outside the shell 4, for example, onto the coal 6 on the belt conveyor 7. The light reflected by the coal 6 enters the shell 4 through the entrance of the shell 4, and the reflected light passes through the aperture 5 and reaches the optical fiber 3, thereby collecting the reflected light to analyze the spectrum of the coal.

[0030] The aperture 5 can limit the amount of light entering the optical fiber 3, and in particular block stray light from entering the optical fiber 3, so as to improve the accuracy of spectral analysis.

[0031] The housing 4 can serve as a base for various components and play a supporting role. On the other hand, it can prevent external light from entering and reduce stray light from entering the optical fiber 3. The housing 4 is generally formed in a tubular shape.

[0032] In this solution, the aperture can block stray light from entering the optical fiber, ensuring that the optical fiber collects more effective light signals and improving the accuracy of spectral analysis.

[0033] The aperture 5 is an aperture aperture. The aperture aperture 5 is formed with a central hole to allow the passage of the light beam. The aperture aperture can limit the light beam, that is, limit the reflected light beam between the optical fiber 3 and the coal 6, and reduce the entry of stray light.

[0034] In addition, in some embodiments, the coal spectrum collection device includes a plurality of apertures 5, and the apertures of the plurality of apertures 5 decrease in sequence along the light path direction. The light path direction refers to the direction in which the reflected light is directed toward the optical fiber 3. The plurality of apertures 5 filter and block stray light in sequence, which can further enhance the stray light blocking effect. Figure 1 As shown, two apertures 5 may be provided, or more apertures 5 may be provided.

[0035] In some embodiments, the aperture of the aperture 5 is adjustable. According to the size of the housing 4, the distance between the optical fiber 3 and the aperture 5, and the distance between the aperture 5 and the entrance of the housing 4, the aperture of the aperture 5 can be set to different values ​​to block stray light while ensuring that more effective light signals pass through the aperture 5 and enter the optical fiber 3.

[0036] In some embodiments, the optical fiber 3 extends toward the central hole of the aperture 5. The optical fiber 3 is a long and narrow structure, which extends toward the central hole of the aperture 5, that is, aligned with the central hole of the aperture 5, so that the light beam passing through the aperture 5 can enter the optical fiber 3.

[0037] In addition, in some embodiments, a converging lens is provided at one end of the optical fiber 3 facing the aperture 5. Converging lens ( Figure 1The optical fiber 3 (not shown) can converge the light beam, and the converged light beam is injected into the optical fiber 3, which can allow more light to enter the optical fiber 3 to improve the accuracy of spectral analysis.

[0038] In addition, in some embodiments, the spectrum collection device of coal includes two light sources 1 symmetrically arranged about the central axis of the aperture 5. The two light sources 1 can emit more uniform light to the coal, ensuring that the reflected light has better uniformity to improve the accuracy of the analysis. Of course, in other embodiments, multiple apertures 5 can also be arranged around the central axis of the aperture 5 to further improve the uniformity of the light.

[0039] In some embodiments, the light source 1 is a halogen lamp.

[0040] In addition, in some embodiments, the coal spectrum acquisition device further comprises a photoelectric sensor 2 disposed at the outlet of the housing 4. The photoelectric sensor 2 can detect the intensity of the light of the light source 1. When the light intensity of the light source decreases due to long-term use, it is convenient for the staff to find out in time so as to replace the appropriate light source.

[0041] In addition, in some embodiments, a low reflectivity coating is provided on the inner surface of the housing 4. The low reflectivity coating can reduce the reflection of light on the housing 4, thereby reducing the formation of stray light, thereby reducing the stray light entering the optical fiber 3.

[0042] On the other hand, the present solution provides a coal detection system, wherein the coal detection system includes the coal spectrum acquisition device described in the above solution. The coal detection system may include a spectrum analyzer, which is communicatively connected to the optical fiber 3 to receive and process the spectrum signal transmitted by the optical fiber 3, and the coal detection system may also include a belt conveyor 7 to transport the coal.

[0043] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0044] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A coal spectrum collection device, characterized in that: The invention comprises a shell (4), a light source (1) arranged in the shell (4), an aperture (5) and an optical fiber (3), wherein the light source (1) is located on the entrance side of the aperture (5) and faces the entrance of the shell (4), and the optical fiber (3) is located on the exit side of the aperture (5).

2. The coal spectrum acquisition device according to claim 1, characterized in that: The diaphragm (5) is an aperture diaphragm.

3. The coal spectrum acquisition device according to claim 2, characterized in that: It comprises a plurality of diaphragms (5), the apertures of which decrease in sequence along the direction of the light path.

4. The coal spectrum acquisition device according to claim 2, characterized in that: The aperture of the diaphragm (5) is adjustable.

5. The coal spectrum acquisition device according to claim 1, characterized in that: The optical fiber (3) extends toward the central hole of the aperture (5).

6. The coal spectrum collection device according to claim 1, characterized in that: A converging lens is provided at one end of the optical fiber (3) facing the aperture (5).

7. The coal spectrum collection device according to claim 1, characterized in that: It comprises two light sources (1) which are symmetrically arranged about the central axis of the aperture (5).

8. The coal spectrum collection device according to claim 1, characterized in that: It also includes a photoelectric sensor (2) arranged at the outlet of the housing (4).

9. The coal spectrum collection device according to claim 1, characterized in that: The inner surface of the shell (4) is provided with a low reflectivity coating.

10. A coal detection system, characterized in that: The coal detection system comprises the coal spectrum acquisition device according to any one of claims 1-9.

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