Coal flow switch signal detection device

Abstract

The present invention relates to the technical field of coal flow detection, and more specifically to a coal flow switch signal detection device, comprising a mounting frame configured in a door shape and mounted on a bracket of a coal conveyor belt; a coal flow switch detection plate, one end of which is mounted on the upper door frame of the mounting frame and the other end of which extends above the coal conveyor belt and is provided with a roller; a photoelectric switch, mounted on one end of the coal flow switch detection plate near the upper door frame of the mounting frame, for determining whether coal flow is present based on the angle at which the coal flow switch detection plate deviates from the mounting frame; and a coal flow switch signal control unit for outputting a coal flow switch signal based on the coal flow switch signal emitted by the photoelectric switch. Using this coal flow switch signal detection device, accurate coal flow detection can be achieved in practical applications.

Description

Technical Field

[0001] The present invention relates to the technical field of coal flow detection, and in particular to a coal flow switch signal detection device. Background Art

[0002] The coal flow signal on the coal conveyor belts of coal-fired power plants and coal mines is a critical production process signal, involved in the chained start and stop of many subsequent equipment. In particular, many coal-fired power plants currently involve the co-processing of sludge. When there is no coal flow, the sludge loading system must be chained and stopped, otherwise it will cause boiler accidents. Currently, coal flow signal detection in coal-fired power plants typically uses a contact-type mechanical coal flow switch. However, over time, the coal flow detection plate of a contact-type mechanical coal flow switch, which contacts the coal flow, suffers severe wear, resulting in reduced coal flow detection accuracy and even misjudgment.

[0003] Therefore, there is an urgent need for a coal flow switch signal detection device to effectively improve the detection accuracy of coal flow. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of low detection accuracy of the contact-type mechanical coal flow switch commonly used in the prior art to detect coal flow, and to provide a coal flow switch signal detection device.

[0005] In order to achieve the above object, the present invention provides a coal flow switch signal detection device, the coal flow switch signal detection device comprising:

[0006] A mounting frame, constructed in a door shape and mounted on a support of the coal conveyor belt;

[0007] A coal flow switch detection plate, one end of which is mounted on the upper door frame of the mounting frame, and the other end of which extends above the coal conveyor belt and is provided with a roller;

[0008] a photoelectric switch, mounted on one end of the coal flow switch detection plate close to the upper door frame of the mounting frame, for determining whether coal flow occurs based on an angle at which the coal flow switch detection plate deviates from the mounting frame;

[0009] The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by the photoelectric switch.

[0010] Preferably, a power generation component is provided in the drum for converting mechanical energy into electrical energy to power the coal flow monitoring component. The monitoring unit of the coal flow monitoring component is used to determine whether coal flow occurs based on the real-time image on the coal conveyor belt obtained by the monitoring probe;

[0011] The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by at least one of the photoelectric switch and the monitoring unit.

[0012] Preferably, the drum is further provided with a current detection and analysis unit for obtaining the thickness value of the coal flow according to the size of the generated current, and judging whether the coal flow occurs according to the thickness value of the coal flow;

[0013] The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by at least one of the photoelectric switch, the monitoring unit and the current detection and analysis unit.

[0014] Preferably, the coal flow switch detection plate includes an upper detection plate and a lower detection plate, and the upper detection plate and the lower detection plate are connected by a coupling, which is used to rotate the lower detection plate relative to the upper detection plate, and the lower detection plate extends vertically to above the coal conveyor belt.

[0015] Preferably, the coupling divides the coal flow switch detection plate into the upper detection plate and the lower detection plate at the lower door frame of the mounting frame.

[0016] Preferably, the upper detection plate includes a first detection plate and a second detection plate, and a plurality of screw holes are correspondingly provided on the first detection plate and the second detection plate for adjusting the length of the upper detection plate.

[0017] Preferably, judging whether coal flow occurs based on the real-time image on the coal conveyor belt obtained by the monitoring probe specifically includes:

[0018] The real-time image of the coal conveyor belt obtained by the monitoring probe is compared with the preset coal flow image based on the similarity method, and when the similarity value between the real-time image and the preset coal flow image is greater than the set similarity threshold, it is judged that coal flow occurs, otherwise it is judged that coal flow does not occur.

[0019] Preferably, the determining whether coal flow occurs based on the angle at which the coal flow switch detection plate deviates from the mounting frame specifically includes: when the angle at which the coal flow switch detection plate deviates from the mounting frame exceeds a set angle threshold, the coal flow switch detection plate does not block the photoelectric switch, and it is determined that coal flow occurs; otherwise, the coal flow switch detection plate blocks the photoelectric switch, and it is determined that coal flow does not occur;

[0020] The determining whether the coal flow occurs according to the thickness of the coal flow specifically includes: when the thickness of the coal flow is greater than a set thickness threshold, determining that the coal flow occurs; otherwise, determining that the coal flow does not occur.

[0021] Preferably, the coal flow monitoring component further includes a lighting lamp for illuminating the monitoring probe.

[0022] Preferably, the coal flow switch detection plate is installed on the upper door frame of the mounting frame through a detection plate fixing adjuster, and the photoelectric switch is installed on one end of the coal flow switch detection plate close to the upper door frame of the mounting frame through a photoelectric switch fixing frame.

[0023] According to the above technical solution, based on the coal flow switch signal detection device, by arranging a roller at one end of the coal flow switch detection plate extending to the coal conveyor belt, the sliding friction is changed to rolling friction, which can effectively improve the service life of the detection device. Furthermore, by arranging the photoelectric switch, the photoelectric switch can be blocked by the coal flow switch detection plate when there is no coal flow so that it outputs a no-coal flow switch signal. When there is coal flow, the roller end of the coal flow switch detection plate is bent at a set angle in the direction away from the mounting frame under the action of the coal flow, so that the photoelectric switch is not blocked, thereby realizing accurate detection of the coal flow.

[0024] At the same time, a power generation component is provided in the drum to convert mechanical energy into electrical energy to power the coal flow monitoring component. The monitoring unit of the coal flow monitoring component is used to determine whether coal flow occurs based on the real-time image on the coal conveyor belt obtained by the monitoring probe. While improving the service life of the detection device, it can realize the recycling of mechanical energy and power the coal flow monitoring component, thereby further effectively improving the detection accuracy of coal flow based on redundant detection.

[0025] A current detection and analysis unit is also provided in the drum, which is used to obtain the thickness value of the coal flow according to the size of the power generation current, and to determine whether the coal flow occurs according to the thickness value of the coal flow. The detection accuracy of the coal flow can be further effectively improved based on redundant detection, and the subsequent equipment of the coal-fired power plant, such as the mud system, can be linked based on the obtained coal flow thickness value, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a coal flow switch signal detection device.

[0027] Description of Reference Numerals

[0028] 1. Mounting frame; 11. Upper door frame; 12. Lower door frame; 2. Coal conveyor belt; 3. Coupling; 4. Coal flow switch detection plate; 5. Roller; 6. Photoelectric switch; 7. Photoelectric switch fixing bracket; 8. Detection plate fixing adjuster; 9. Coal flow monitoring assembly; 91. Monitoring unit; 92. Monitoring probe; 93. Lighting lamp; 13. Screw hole. DETAILED DESCRIPTION

[0029] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0030] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or implicitly specify the quantity of the technical features indicated. Therefore, unless otherwise specified, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features; "plurality" means two or more. The term "comprising" and any variations thereof are intended to imply the non-exclusive inclusion, possible presence, or addition of one or more other features, units, components, and / or combinations thereof.

[0031] Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0032] The present invention provides a coal flow switch signal detection device, such as Figure 1 As shown, the coal flow switch signal detection device includes:

[0033] The mounting frame 1 is constructed in a door shape and is mounted on the bracket of the coal conveyor belt 2;

[0034] The coal flow switch detection plate 4 has one end mounted on the upper door frame 11 of the mounting frame 1 and the other end extending above the coal conveyor belt 2 and having a roller 5 provided at the end thereof;

[0035] a photoelectric switch 6, mounted on one end of the coal flow switch detection plate 4 close to the upper door frame 11 of the mounting frame 1, for determining whether coal flow occurs based on the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1;

[0036] The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by the photoelectric switch 6.

[0037] Specifically, the coal flow switch detection plate 4 is installed on the upper door frame of the mounting frame 1 through the detection plate fixing adjuster 8; the photoelectric switch 6 is installed on one end of the coal flow switch detection plate 4 close to the upper door frame 11 of the mounting frame 1 through the photoelectric switch fixing frame 7.

[0038] According to the above technical solution, based on the coal flow switch signal detection device, by arranging a roller at one end of the coal flow switch detection plate extending to the coal conveyor belt, the sliding friction is changed to rolling friction, which can effectively improve the service life of the detection device. Furthermore, by arranging the photoelectric switch, the photoelectric switch can be blocked by the coal flow switch detection plate when there is no coal flow so that it outputs a no-coal flow switch signal. When there is coal flow, the roller end of the coal flow switch detection plate is bent at a set angle in the direction away from the mounting frame under the action of the coal flow, so that the photoelectric switch is not blocked, thereby realizing accurate detection of the coal flow.

[0039] In the coal flow switch signal detection device of the present invention, preferably, the determining whether coal flow occurs according to the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1 specifically includes:

[0040] When the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1 exceeds a set angle threshold, the coal flow switch detection plate 4 does not block the photoelectric switch 6, and it is determined that coal flow occurs; otherwise, the coal flow switch detection plate 4 blocks the photoelectric switch 6, and it is determined that no coal flow occurs. Thus, whether coal flow occurs is determined based on whether the photoelectric switch 6 is blocked, thereby achieving accurate detection of coal flow.

[0041] In the coal flow switch signal detection device described in the present invention, preferably, a power generation component is provided in the drum 5, which is used to convert mechanical energy into electrical energy to power the coal flow monitoring component 9. The monitoring unit 91 of the coal flow monitoring component 9 is used to determine whether coal flow occurs based on the real-time image on the coal conveyor belt 2 obtained by the monitoring probe 92; the coal flow switch signal control unit is used to output a coal flow switch signal based on the coal flow switch signal emitted by at least one of the photoelectric switch 6 and the monitoring unit 91. While improving the service life of the detection device based on the drum 5, it can realize the recycling of mechanical energy and power the coal flow monitoring component, thereby further effectively improving the detection accuracy of the coal flow based on redundant detection.

[0042] Further preferably, judging whether coal flow occurs based on the real-time image on the coal conveyor belt 2 obtained by the monitoring probe 92 specifically includes:

[0043] The real-time image on the coal conveyor belt 2 obtained by the monitoring probe 92 is compared with the preset coal flow image based on the similarity method, and when the similarity value between the real-time image and the preset coal flow image is greater than the set similarity threshold, it is judged that coal flow occurs, otherwise it is judged that coal flow does not occur, thereby improving the detection accuracy of the coal flow signal.

[0044] More preferably, the coal flow monitoring component 9 further includes a lighting lamp 93 for illuminating the monitoring probe 92, thereby improving the accuracy of determining whether there is coal flow based on the similarity method.

[0045] Among them, the power generation component can be any structure that can convert rotational mechanical energy into electrical energy. Specifically, the power generation component can include a rotating shaft that rotates the drum 5, a gear transmission mechanism that transmits the rotational mechanical energy to the generator, a generator that converts mechanical energy into electrical energy, and a battery for storing electricity, etc.

[0046] In the coal flow switch signal detection device described in the present invention, preferably, a current detection and analysis unit is also provided in the drum 5, which is used to obtain the thickness value of the coal flow according to the size of the power generation current, and to determine whether the coal flow occurs according to the size of the coal flow thickness value; the coal flow switch signal control unit is used to output the coal flow switch signal according to the coal flow switch signal emitted by at least one of the photoelectric switch 6, the monitoring unit 91 and the current detection and analysis unit, so as to further effectively improve the detection accuracy of the coal flow based on redundant detection, and can also be linked with subsequent equipment of the coal-fired power plant such as the mud system based on the obtained coal flow thickness value, thereby improving the power generation efficiency.

[0047] Specifically, determining whether a coal flow is present based on the coal flow thickness includes determining that a coal flow is present when the coal flow thickness is greater than a set thickness threshold, and determining that a coal flow is not present otherwise. The set thickness threshold is set based on the actual minimum coal flow conveying thickness to ensure accurate detection of the coal flow signal.

[0048] Furthermore, the coal flow switch signal control unit is also used to judge the coal flow switch signal sent by the photoelectric switch 6, the monitoring unit 91 and the current detection and analysis unit according to their priorities, and then output the final coal flow switch signal. Preferably, the priority of the current detection and analysis unit is regarded as the first priority, and the priorities of the photoelectric switch 6 and the monitoring unit 91 are regarded as the secondary priority. When the current detection and analysis unit outputs a coal flow switch signal, the coal flow switch signal is finally output. When the current detection and analysis unit outputs no coal flow switch signal, if at least one of the photoelectric switch 6 and the monitoring unit 91 outputs a coal flow switch signal, an alarm is issued and handled by the staff, thereby improving the detection accuracy of the coal flow and ensuring the safety of the process system by avoiding false detection by the monitoring unit 91 and the photoelectric switch 6. Of course, other priority setting methods are also possible, which will not be explained here one by one.

[0049] In the coal flow switch signal detection device described in the present invention, preferably, the coal flow switch detection plate 4 includes an upper detection plate and a lower detection plate, and the upper detection plate and the lower detection plate are connected by a coupling 3, which is used to rotate the lower detection plate relative to the upper detection plate, and the lower detection plate extends vertically to the top of the coal conveyor belt 2, thereby alleviating vibration and reducing the shear force on the coal flow switch detection plate 4, and avoiding the coal flow switch detection plate 4 from being damaged by plastic deformation under the action of force when the coal flow thickness is large and the speed is fast. Preferably, as Figure 1 As shown, the coupling 3 divides the coal flow switch detection plate 4 into the upper detection plate and the lower detection plate at the lower door frame 12 of the mounting frame 1, thereby better alleviating vibration and reducing the shear force on the coal flow switch detection plate 4.

[0050] In another preferred embodiment, the upper detection plate includes a first detection plate and a second detection plate, and a plurality of screw holes 13 are correspondingly provided on the first detection plate and the second detection plate for adjusting the length of the upper detection plate so as to be suitable for the detection needs of coal flows of different thicknesses.

[0051] The present invention will be described in detail below through examples, but the protection scope of the present invention is not limited thereto.

[0052] Example 1

[0053] Use Figure 1 The coal flow switch signal detection device shown is implemented, specifically, the coal flow switch signal detection device includes:

[0054] The mounting frame 1 is constructed in a door shape and is mounted on the bracket of the coal conveyor belt 2;

[0055] The coal flow switch detection plate 4 has one end mounted on the upper door frame 11 of the mounting frame 1 and the other end extending above the coal conveyor belt 2 and having a roller 5 provided at the end thereof;

[0056] a photoelectric switch 6, mounted on one end of the coal flow switch detection plate 4 close to the upper door frame 11 of the mounting frame 1, for determining whether coal flow occurs based on the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1;

[0057] A coal flow switch signal control unit, configured to output a coal flow switch signal according to the coal flow switch signal emitted by the photoelectric switch 6;

[0058] The coal flow switch detection plate 4 is mounted on the upper door frame of the mounting frame 1 through the detection plate fixing adjuster 8, and the photoelectric switch 6 is mounted on one end of the coal flow switch detection plate 4 close to the upper door frame 11 of the mounting frame 1 through the photoelectric switch fixing frame 7;

[0059] The coal flow switch detection plate 4 includes an upper detection plate and a lower detection plate, the upper detection plate and the lower detection plate are connected by a coupling 3, which is used to rotate the lower detection plate relative to the upper detection plate, and the lower detection plate extends vertically to the top of the coal conveyor belt 2;

[0060] The coupling 3 divides the coal flow switch detection plate 4 into the upper detection plate and the lower detection plate at the lower door frame 12 of the mounting frame 1;

[0061] The upper detection plate includes a first detection plate and a second detection plate, and a plurality of screw holes 13 are correspondingly provided on the first detection plate and the second detection plate for adjusting the length of the upper detection plate;

[0062] The method of judging whether coal flow occurs based on the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1 specifically includes: when the angle at which the coal flow switch detection plate 4 deviates from the mounting frame 1 exceeds a set angle threshold, the coal flow switch detection plate 4 does not block the photoelectric switch 6, and it is judged that coal flow occurs; otherwise, the coal flow switch detection plate 4 blocks the photoelectric switch 6, and it is judged that no coal flow occurs.

[0063] In actual application, when there is no coal flow on the coal conveyor belt 2, the coal flow switch detection plate 4 blocks the photoelectric switch 6, and the photoelectric switch 6 sends a no-coal-flow switch signal. The coal flow switch signal control unit outputs a no-coal-flow switch signal according to the no-coal-flow switch signal sent by the photoelectric switch 6; when there is coal flow on the coal conveyor belt 2, the roller 5 of the coal flow switch detection plate 4 rotates under the action of the coal flow and the coal flow switch detection plate 4 as a whole bends in the direction away from the mounting frame 1 exceeding the set angle threshold. At this time, the coal flow switch detection plate 4 does not block the photoelectric switch 6, and the photoelectric switch 6 sends a coal flow switch signal. The coal flow switch signal control unit outputs a coal flow switch signal according to the coal flow switch signal sent by the photoelectric switch 6.

[0064] After testing, it was found that the coal flow switch signal detection device of the present invention can effectively improve the detection accuracy of coal flow compared with the contact-type mechanical coal flow switch, and has the advantage of a long service life.

[0065] Example 2

[0066] The embodiment is implemented with reference to Example 1, except that a power generation component is provided in the drum 5 for converting mechanical energy into electrical energy to power the coal flow monitoring component 9. The monitoring unit 91 of the coal flow monitoring component 9 is used to determine whether coal flow occurs based on the real-time image on the coal conveyor belt 2 obtained by the monitoring probe 92; the coal flow switch signal control unit is used to output a coal flow switch signal based on the coal flow switch signal emitted by at least one of the photoelectric switch 6 and the monitoring unit 91;

[0067] The determination of whether coal flow occurs based on the real-time image on the coal conveyor belt 2 acquired by the monitoring probe 92 specifically includes:

[0068] The real-time image of the coal conveyor belt 2 obtained by the monitoring probe 92 is compared with the preset coal flow image based on the similarity method, and when the similarity value between the real-time image and the preset coal flow image is greater than the set similarity threshold, it is judged that coal flow occurs, otherwise it is judged that coal flow does not occur; the coal flow monitoring component 9 also includes a lighting lamp 93 for illuminating the monitoring probe 92.

[0069] In actual application, the coal flow switch signal control unit outputs a coal flow switch signal according to the coal flow switch signal sent by any one of the photoelectric switch 6 and the monitoring unit 91 .

[0070] After testing, it was found that the coal flow switch signal detection device of the present invention can further effectively improve the detection accuracy of coal flow based on redundant detection compared with the solution in Example 1.

[0071] Example 3

[0072] The embodiment 2 is implemented with reference to the embodiment 2, except that a current detection and analysis unit is further provided in the drum 5, for obtaining the thickness value of the coal flow according to the magnitude of the generated current, and determining whether the coal flow occurs according to the thickness value of the coal flow;

[0073] The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by at least one of the photoelectric switch 6, the monitoring unit 91 and the current detection and analysis unit;

[0074] The determining whether the coal flow occurs according to the thickness of the coal flow specifically includes: when the thickness of the coal flow is greater than a set thickness threshold, determining that the coal flow occurs; otherwise, determining that the coal flow does not occur.

[0075] In actual application, the coal flow switch signal control unit outputs a coal flow switch signal according to the coal flow switch signal sent by any one of the photoelectric switch 6, the monitoring unit 91 and the current detection and analysis unit.

[0076] After testing, it was found that the coal flow switch signal detection device described in the present invention can further effectively improve the detection accuracy of coal flow based on redundant detection compared with the solution in Example 2, and can also be linked with subsequent equipment of the coal-fired power plant such as the mud system based on the obtained coal flow thickness value, thereby improving the power generation efficiency.

[0077] The coal flow switch signal detection device provided by the present invention provides a roller at one end of the coal flow switch detection plate extending to the coal conveyor belt, thereby changing sliding friction into rolling friction, which can effectively improve the service life of the detection device. Furthermore, by providing the photoelectric switch, the photoelectric switch can be blocked by the coal flow switch detection plate when there is no coal flow so that it outputs a no-coal flow switch signal. When there is coal flow, the roller end of the coal flow switch detection plate is bent at a set angle away from the mounting frame under the action of the coal flow, so that the photoelectric switch is not blocked, thereby achieving accurate detection of the coal flow.

[0078] While the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited thereto. Within the technical scope of the present invention, various simple variations of the technical solution of the present invention may be made. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple variations and combinations should also be considered as disclosed herein and fall within the scope of protection of the present invention.

Claims

1. A coal flow switch signal detection device, characterized in that: The coal flow switch signal detection device comprises: A mounting frame (1) configured in a door shape and mounted on a bracket of a coal conveyor belt (2); A coal flow switch detection plate (4), one end of which is mounted on the upper door frame (11) of the mounting frame (1), and the other end of which extends above the coal conveyor belt (2) and is provided with a roller (5); a photoelectric switch (6) mounted on one end of the coal flow switch detection plate (4) close to the upper door frame (11) of the mounting frame (1), and used to determine whether coal flow occurs based on the angle at which the coal flow switch detection plate (4) deviates from the mounting frame (1); A coal flow switch signal control unit, configured to output a coal flow switch signal according to the coal flow switch signal emitted by the photoelectric switch (6); A power generation component is provided in the drum (5) for converting mechanical energy into electrical energy to power the coal flow monitoring component (9); a monitoring unit (91) of the coal flow monitoring component (9) is used to determine whether coal flow occurs based on a real-time image on the coal conveying belt (2) obtained by a monitoring probe (92); The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by at least one of the photoelectric switch (6) and the monitoring unit (91); The drum (5) is also provided with a current detection and analysis unit for obtaining the thickness value of the coal flow according to the size of the generated current, and judging whether the coal flow occurs according to the size of the thickness value of the coal flow; The coal flow switch signal control unit is used to output a coal flow switch signal according to the coal flow switch signal sent by at least one of the photoelectric switch (6), the monitoring unit (91) and the current detection and analysis unit; The determining whether coal flow occurs based on the real-time image on the coal conveyor belt (2) obtained by the monitoring probe (92) specifically includes: The real-time image on the coal conveyor belt (2) obtained by the monitoring probe (92) is compared with the preset coal flow image based on a similarity method, and when the similarity value between the real-time image and the preset coal flow image is greater than a set similarity threshold, it is determined that coal flow occurs; otherwise, it is determined that coal flow does not occur.

2. The coal flow switch signal detection device according to claim 1, characterized in that: The coal flow switch detection plate (4) comprises an upper detection plate and a lower detection plate, wherein the upper detection plate and the lower detection plate are connected via a coupling (3) for enabling the lower detection plate to be rotated relative to the upper detection plate, and the lower detection plate extends vertically to above the coal conveying belt (2).

3. The coal flow switch signal detection device according to claim 2, characterized in that: The coupling (3) divides the coal flow switch detection plate (4) into the upper detection plate and the lower detection plate at the lower door frame (12) of the mounting frame (1).

4. The coal flow switch signal detection device according to claim 2, characterized in that: The upper detection plate comprises a first detection plate and a second detection plate, and a plurality of screw holes (13) are correspondingly provided on the first detection plate and the second detection plate for adjusting the length of the upper detection plate.

5. The coal flow switch signal detection device according to claim 1, characterized in that: The method of judging whether coal flow occurs according to the angle at which the coal flow switch detection plate (4) deviates from the mounting frame (1) specifically includes: when the angle at which the coal flow switch detection plate (4) deviates from the mounting frame (1) exceeds a set angle threshold, the coal flow switch detection plate (4) does not block the photoelectric switch (6), and it is judged that coal flow occurs; otherwise, the coal flow switch detection plate (4) blocks the photoelectric switch (6), and it is judged that coal flow does not occur; The determining whether the coal flow occurs according to the thickness of the coal flow specifically includes: when the thickness of the coal flow is greater than a set thickness threshold, determining that the coal flow occurs; otherwise, determining that the coal flow does not occur.

6. The coal flow switch signal detection device according to claim 1, characterized in that: The coal flow monitoring component (9) further includes a lighting lamp (93) for illuminating the monitoring probe (92).

7. The coal flow switch signal detection device according to claim 1, characterized in that: The coal flow switch detection plate (4) is mounted on the upper door frame (11) of the mounting frame (1) via a detection plate fixing adjuster (8), and the photoelectric switch (6) is mounted on one end of the coal flow switch detection plate (4) close to the upper door frame (11) of the mounting frame (1) via a photoelectric switch fixing frame (7).

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