Online ash content detection device

Abstract

The utility model relates to the technical field of coal ash content on-line detection, in particular to an on-line ash content detection device which comprises a detection probe and a box body arranged above a coal conveying belt, the box body is provided with a contact face facing the conveying belt and making contact with coal, a concave structure is arranged on the contact face, and a first through hole communicating the interior of the box body with the outside is formed in the concave structure. The detection probe is arranged in the box body and detects the ash content of the coal, located at the concave structure, on the conveying belt through the first through hole. The box body pushes away the coal, higher than the contact surface, on the conveying belt, so that the detection probe in the box body is protected, and the distance between the detection probe and the coal is shortened. And the contact surface flattens the coal on the conveying belt, so that the detection precision of the detection probe is further improved. The first through hole is formed in the concave structure, and coal is prevented from entering the box body through the first through hole. Compared with the prior art, the distance between the detection probe and the coal on the conveying belt is closer, and the detection precision of the detection probe is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of online detection of coal ash content, in particular to an online ash content detection device. Background Art

[0002] The ash content in coal is one of the coal pricing standards. The ash content in coal can be detected by an X-ray ash analyzer, which uses the principle of combining X-ray fluorescence technology with X-ray absorption. It can quickly measure the ash content and calorific value of coal and has a high detection rate.

[0003] The X-ray ash analyzer includes a detection probe, which is the execution body of the X-ray ash analyzer and is installed above the coal conveyor belt.

[0004] Normally, in order to prevent the coal on the coal conveyor belt from colliding with the detection probe and causing damage to the detection probe, the detection probe is installed at a large distance from the coal on the coal conveyor belt. Although this setting can protect the detection probe, the detection probe is far away from the coal, which affects the detection accuracy of the X-ray ash analyzer. Utility Model Content

[0005] (I) The problem to be solved by the utility model is that the detection probe of the existing X-ray ash analyzer is far away from the coal on the conveyor belt, which affects the detection accuracy of the ash content in the coal.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the embodiment of the utility model provides an online ash detection device, comprising: a detection probe and a box body arranged above a conveyor belt of coal;

[0008] The box body has a contact surface facing the conveyor belt and in contact with the coal, the contact surface is provided with a recessed structure, and the recessed structure is provided with a first through hole connecting the interior of the box body with the outside;

[0009] The detection probe is arranged in the box body, and the detection probe detects the ash content of the coal located at the recessed structure on the conveyor belt through the first through hole.

[0010] Furthermore, the contact surface is a smooth plane.

[0011] Furthermore, the recessed structure is a groove provided on the contact surface, and the first through hole is provided on the bottom wall of the groove.

[0012] Furthermore, a shoveling structure is provided at the front end of the contact surface.

[0013] Furthermore, the box body includes a first bottom plate, and a surface of the first bottom plate facing the conveyor belt is the contact surface;

[0014] The shoveling structure includes a first baffle and a second baffle;

[0015] The first baffle plate is connected to the second baffle plate, and the lower ends of the first baffle plate and the second baffle plate are both connected to the front end of the first bottom plate;

[0016] The first baffle plate and the second baffle plate are arranged to be inclined along the front-to-back direction, and / or the first baffle plate and the second baffle plate are arranged to be inclined along the up-down direction.

[0017] Furthermore, a first protective film is provided at the first through hole.

[0018] Furthermore, a second through hole is provided in the recessed structure;

[0019] The second through hole is spaced apart from the first through hole, and the second through hole is located at the front end of the first through hole;

[0020] A first monitoring component is disposed in the box body, and a second protective film made of the same material as the first protective film is disposed at the second through hole. The first monitoring component is used to monitor the damage state of the second protective film.

[0021] Furthermore, the thickness of the second protective film is smaller than the thickness of the first protective film.

[0022] Furthermore, it also includes a second monitoring device and a controller;

[0023] The second monitoring component is electrically connected to the controller, and is used to monitor the conveying status of the coal on the conveyor belt. The controller controls the operating status of the online ash detection device according to the detection result of the second monitoring component.

[0024] Further, it also includes a support frame and a connecting rod;

[0025] The box body is connected to the support frame via a connecting rod;

[0026] The length of the connecting rod can be adjusted, and the connecting rod and the box body, as well as the connecting rod and the supporting frame are all rotatably connected.

[0027] Beneficial effects of the utility model:

[0028] An embodiment of the utility model provides an online ash detection device, comprising: a detection probe and a box body arranged above a conveyor belt of coal; the box body has a contact surface facing the conveyor belt and in contact with the coal, the contact surface is provided with a recessed structure, and the recessed structure is provided with a first through hole connecting the interior of the box body with the outside; the detection probe is arranged in the box body, and the detection probe detects the ash content of the coal on the conveyor belt located at the recessed structure through the first through hole.

[0029] When in use, the box body can push away the coal on the conveyor belt that is higher than the contact surface, thereby protecting the detection probe inside the box body and shortening the distance between the detection probe and the coal on the conveyor belt. In addition, the contact surface can also smooth out the scattered coal on the conveyor belt, so that the detection accuracy of the detection probe can be further improved. A recessed structure is provided on the contact surface, and a first through hole is opened in the recessed structure. In this way, a gap is generated between the recessed structure and the surface of the coal, thereby preventing the coal from entering the box body through the first through hole and damaging the detection probe. Compared with the prior art, the detection probe is closer to the coal on the conveyor belt, and the distance between the detection probe and the coal can always be kept constant, which improves the detection accuracy of the detection probe and the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A three-dimensional diagram of an online ash content detection device provided by an embodiment of the utility model;

[0032] Figure 2 A three-dimensional diagram of an online ash content detection device from another perspective provided by an embodiment of the utility model;

[0033] Figure 3 A plan view of an online ash content detection device provided by an embodiment of the utility model;

[0034] Figure 4 A plan view of an online ash content detection device from another perspective provided in an embodiment of the utility model.

[0035] Icons: 1-box; 11-first bottom plate; 111-recessed structure; 112-first through hole; 113-second through hole; 114-contact surface; 12-first baffle; 13-second baffle; 14-first side plate; 15-second bottom plate; 16-second side plate;

[0036] 21-support frame; 22-connecting rod. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The utility model embodiment provides an online ash detection device, such as Figures 1 to 4 As shown, the online ash detection device includes: a detection probe and a box 1 arranged above the conveyor belt of coal; the box 1 has a contact surface 114 facing the conveyor belt and in contact with the coal, and a recessed structure 111 is provided on the contact surface 114, and a first through hole 112 connecting the inside of the box 1 with the outside is provided in the recessed structure 111; the detection probe is arranged in the box 1, and the detection probe detects the ash content of the coal on the conveyor belt located at the recessed structure 111 through the first through hole 112.

[0039] The online ash content detection device provided in this embodiment is used for online detection of the ash content of coal on a conveyor belt when the conveyor belt is conveying coal.

[0040] Specifically, the online ash content detection device includes a detection probe and a box 1. The detection probe includes an X-ray tube and a detector. The X-ray tube emits X-rays to the coal on the conveyor belt. The X-rays can excite the fluorescent substances in the coal. The detector is used to receive the scattered X-ray fluorescence, thereby obtaining the ash content of the coal. The interior of the box 1 is hollow, and the interior of the box 1 is used to accommodate the detection probe and some other electronic equipment to prevent the detection probe from colliding with the coal on the conveyor belt during use, thereby protecting the detection probe to a certain extent. In addition, arranging the detection probe inside the box 1 can also prevent the operator's health from being affected by X-rays. The box body 1 is erected above the conveyor belt, and has a contact surface 114 on the lower side of the box body 1. During use, the box body 1 can push away the coal on the conveyor belt that is higher than the contact surface 114, and make the contact surface 114 directly contact with the remaining coal on the conveyor belt after being pushed away. In this way, by setting the detection probe inside the box body 1 close to the contact surface 114, it is possible to shorten the distance between the detection probe and the coal while avoiding collision between the detection probe and the coal, thereby improving the detection accuracy of the detection probe.

[0041] The contact surface 114 is provided with a recessed structure 111 recessed toward the interior of the box 1, and a first through hole 112 is provided in the recessed structure 111, and the two ends of the first through hole 112 are respectively connected to the outside and the interior of the box 1. When in use, the X-rays emitted by the detection probe can pass through the first through hole 112 and be emitted to the outside and used to detect the ash content of the coal on the conveyor belt. By providing the recessed structure 111, when in use, the coal in contact with the contact surface 114 can be prevented from entering the interior of the box 1 through the first through hole 112, thereby playing a certain protective role for the detection probe inside the box 1.

[0042] When in use, the box 1 is placed as close to the conveyor belt as possible, and the detection probe is placed as close to the contact surface 114 as possible; the conveyor belt is operated and begins to convey coal, and when the coal reaches the position of the box 1, the coal on the conveyor belt that is higher than the contact surface 114 of the box 1 is pushed away by the box 1, so that the contact surface 114 on the box 1 directly contacts the coal on the conveyor belt, thereby shortening the distance between the detection probe and the coal. The concave structure 111 on the contact surface 114 can prevent the coal in contact with the contact surface 114 from entering the interior of the box 1 from the first through hole 112.

[0043] In this embodiment, the first through hole 112 is arranged toward the coal located at the recessed structure 111 on the conveyor belt, so that the X-rays emitted by the detection probe can pass through the first through hole 112 to the outside and pass through the coal on the conveyor belt, thereby realizing the detection of the ash content of the coal.

[0044] Furthermore, in this embodiment, after the coal on the conveyor belt that is higher than the contact surface 114 is pushed away, the remaining coal is also smoothed by the contact surface 114, so that the distance between the detection probe and the coal is fixed, which can further improve the detection accuracy of the detection probe and the accuracy of the detection results.

[0045] Through experiments, the distance between the detection probe and the coal can be shortened to 8mm and can be kept constant at the distance of 8mm.

[0046] The online ash detection device provided in this embodiment, when in use, the box body 1 can push away the coal on the conveyor belt that is higher than the contact surface 114, thereby protecting the detection probe inside the box body 1 and shortening the distance between the detection probe and the coal on the conveyor belt. In addition, the contact surface 114 can also smooth the scattered coal on the conveyor belt, so that the detection accuracy of the detection probe can be further improved. A recessed structure 111 is provided on the contact surface 114, and the recessed structure 111 is provided with a first through hole 112, so that a gap is generated between the recessed structure 111 and the surface of the coal, thereby preventing the coal from entering the box body 1 through the first through hole 112 and damaging the detection probe. Compared with the prior art, the detection probe is closer to the coal on the conveyor belt, and the distance between the detection probe and the coal can be kept constant, which improves the detection accuracy of the detection probe and the accuracy of the detection result.

[0047] Preferably, the online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, the contact surface 114 is a smooth plane.

[0048] In this embodiment, preferably, the contact surface 114 is a smooth plane, that is, there is no protrusion or other structure higher than the contact surface 114 on the contact surface 114 .

[0049] When in use, the smooth contact surface 114 can make the relative sliding between the contact surface 114 and the coal smoother and reduce the resistance. In addition, the smooth contact surface 114 can better smooth the scattered coal on the conveyor belt, so that the distance between the detection probe and the coal on the conveyor belt can be kept constant, thereby further improving the detection accuracy of the detection probe and improving the accuracy of the detection result.

[0050] The online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, the recessed structure 111 is a groove disposed on the contact surface 114 , and the first through hole 112 is disposed on the bottom wall of the groove.

[0051] In this embodiment, the recessed structure 111 is formed by providing a groove on the contact surface 114 , which has a simple structure and is convenient for the production of the box body 1 .

[0052] Accordingly, in this embodiment, the first through hole 112 is provided on the bottom wall of the groove, so that the detection probe can detect the ash content of the coal located at the recessed structure 111 on the conveyor belt.

[0053] It can be understood that, in this embodiment, the recessed structure 111 can also be a countersunk hole, or an arc-shaped pit, etc.

[0054] Furthermore, the online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4As shown, a shoveling structure is also provided at the front end of the contact surface 114 .

[0055] In this embodiment, the box body 1 includes a shoveling structure, and the shoveling structure is arranged at the front end of the contact surface 114. By arranging the shoveling structure at the front end of the contact surface 114, the shoveling structure can reduce the resistance when pushing away the coal higher than the contact surface 114, so that the online ash detection device and the conveyor belt can run smoothly. At the same time, the shoveling structure can also make the coal in contact with the contact surface 114 more flat, thereby further improving the detection accuracy of the detection probe.

[0056] Specifically, the online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, the box body 1 includes a first bottom plate 11, and the surface of the first bottom plate 11 facing the conveyor belt is the contact surface 114; the shoveling structure includes a first baffle 12 and a second baffle 13; the first baffle 12 and the second baffle 13 are connected, and the lower ends of the first baffle 12 and the second baffle 13 are connected to the front end of the first bottom plate 11; the first baffle 12 and the second baffle 13 are inclined in the front-to-back direction, and / or the first baffle 12 and the second baffle 13 are inclined in the up-down direction.

[0057] In this embodiment, the box body 1 includes a first bottom plate 11, a first baffle 12 and a second baffle 13, and the first baffle 12 and the second baffle 13 form the above-mentioned shoveling structure. The surface of the first bottom plate 11 facing the conveyor belt is the above-mentioned contact surface 114, and the first baffle 12 and the second baffle 13 are connected to the front end of the first bottom plate 11, and the right end of the first baffle 12 is connected to the left end of the second baffle 13. The first baffle 12 and the second baffle 13 cooperate to push away the coal on the conveyor belt that is higher than the contact surface 114.

[0058] That is to say, the box body 1 includes two parts. For the convenience of description, the two parts of the box body 1 are respectively a first main body and a second main body.

[0059] The first body is located above the second body, and the first body includes a second side plate 16, a second top plate and a second bottom plate 15, and the first body is a square structure; the second body includes a first baffle 12, a second baffle 13, a first bottom plate 11 and a first side plate 14, and the second body is a boat-shaped structure. The upper end of the second body is connected to the second bottom plate 15, and the first body and the second body together form an internal hollow box 1.

[0060] Optionally, in this embodiment, the first baffle plate 12 and the second baffle plate 13 may be flat plates or special-shaped plates with a certain curvature.

[0061] Furthermore, in order to reduce the resistance of the first baffle 12 and the second baffle 13 when pushing coal, the first baffle 12 and the second baffle 13 are inclined.

[0062] Specifically, in the first embodiment of the first baffle plate 12 and the second baffle plate 13 , the first baffle plate 12 and the second baffle plate 13 are arranged to be inclined along the front-rear direction.

[0063] In this embodiment, the left end of the first baffle 12 is arranged backward and the right end is arranged forward, and the right end of the second baffle 13 is arranged backward and the left end is arranged forward. In this way, when the first baffle 12 and the second baffle 13 are connected, the first baffle 12 and the second baffle 13 are in a V-shaped structure.

[0064] In the second embodiment of the first baffle plate 12 and the second baffle plate 13 , the first baffle plate 12 and the second baffle plate 13 are arranged to be inclined in the up-down direction.

[0065] In this embodiment, the first baffle 12 and the second baffle 13 are both arranged with their upper ends facing forward and their lower ends facing backward. Thus, when the first baffle 12 and the second baffle 13 are connected, they together form an inclined scraper.

[0066] In the third embodiment of the first baffle 12 and the second baffle 13 , the first baffle 12 and the second baffle 13 are tilted in the front-rear direction, and at the same time, the first baffle 12 and the second baffle 13 are also tilted in the up-down direction.

[0067] In this embodiment, the left end of the first baffle 12 is arranged backward and the right end is arranged forward, and at the same time, the upper end of the first baffle 12 is arranged forward and the lower end is arranged backward; the right end of the second baffle 13 is arranged backward and the left end is arranged forward, and at the same time, the upper end of the second baffle 13 is arranged forward and the lower end is arranged backward, so that when the first baffle 12 and the second baffle 13 are connected, the front end of the second main body presents a boat-shaped structure.

[0068] It should be noted that the front, back, up and down directions are already in Figure 4 As pointed out in the figure, the direction perpendicular to the paper surface is outwards is left, and the direction perpendicular to the paper surface is inwards is right.

[0069] In the present embodiment, preferably, the first baffle 12 and the second baffle 13 are arranged in the third arrangement mode, that is, the first baffle 12 and the second baffle 13 are arranged obliquely along the front-to-back direction, and the first baffle 12 and the second baffle 13 are also arranged obliquely along the up-down direction, so that the resistance of the second main body is minimized and the smoothing effect on the coal is better.

[0070] In the online ash detection device provided by the embodiment of the utility model, a first protective film is provided at the first through hole 112 .

[0071] In this embodiment, a first protective film is further disposed at the first through hole 112 . The first protective film is a transparent film and can be made of an organic polymer material such as plastic.

[0072] In this embodiment, by providing the first protective film at the first through hole 112 , dust and the like can be prevented from entering the box body 1 , thereby providing a certain degree of protection for the detection probe and some other electronic components inside the box body 1 .

[0073] Furthermore, the online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, a second through hole 113 is further provided in the recessed structure 111; the second through hole 113 is spaced apart from the first through hole 112, and the second through hole 113 is located at the front end of the first through hole 112; a first monitoring component is provided in the box body 1, and a second protective film made of the same material as the first protective film is provided at the second through hole 113, and the first monitoring component is used to monitor the damage state of the second protective film.

[0074] In this embodiment, the recessed structure 111 is further provided with a second through hole 113 spaced apart from the first through hole 112, and the second through hole 113 can also connect the interior of the box body 1 with the outside. The second through hole 113 is provided with a second protective film, and the second protective film is made of the same material as the first protective film. The second through hole 113 and the second protective film mainly play a protective role.

[0075] Specifically, a first monitoring component for monitoring whether the second protective film is damaged is provided in the box body 1. When the second protective film at the second through hole 113 is scratched by coal, the first protective film at the first through hole 112 is also at risk of being scratched. In this way, when the second protective film at the second through hole 113 is scratched, the first monitoring component promptly issues an alarm to remind the operator to shut down the conveyor belt in time to avoid the first protective film being scratched by coal and the coal entering the box body 1 to damage the detection probe.

[0076] Optionally, in this embodiment, the first monitoring component may be a camera, which monitors whether the second protective film is damaged by image recognition.

[0077] It can be understood that, in this embodiment, the first monitoring component can also be a rangefinder, which can also achieve the purpose of monitoring whether the second protective film is damaged.

[0078] In this embodiment, it has been mentioned above that the recessed structure 111 is a groove. Preferably, the groove is a long strip groove, and the extending direction of the groove is the same as the conveying direction of the conveyor belt.

[0079] Preferably, in the online ash detection device provided by the embodiment of the utility model, the thickness of the second protective film is less than the thickness of the first protective film.

[0080] In this embodiment, the thickness of the second protective film is smaller than the thickness of the first protective film, so as to improve the monitoring accuracy.

[0081] Furthermore, in this embodiment, the first monitoring component is electrically connected to the controller described below, and the controller is also electrically connected to the drive motor of the conveyor belt. When the first monitoring component detects that the second protective film is damaged, the controller immediately controls the drive motor of the conveyor belt to stop running.

[0082] The online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, it also includes a second monitoring component and a controller; the second monitoring component is electrically connected to the controller, and the second monitoring component is used to monitor the conveying status of the coal on the conveyor belt, and the controller controls the operating status of the online ash detection device according to the detection result of the second monitoring component.

[0083] In this embodiment, a second monitoring device is also provided at the front end of the box body 1. The second monitoring device is used to monitor whether coal is being transported on the conveyor belt. The controller is electrically connected to the detection probe, etc. When the second monitoring device detects that there is no coal being transported on the conveyor belt, the controller controls the detection probe and other structures to shut down to save energy and increase the service life of the detection probe.

[0084] Optionally, in this embodiment, the second monitoring device is a distance meter, which determines whether coal is being transported on the conveyor belt by measuring the distance between the second monitoring device and the conveyor belt.

[0085] It can be understood that, in this embodiment, the second monitoring component can also be a camera, which determines whether coal is being transported on the conveyor belt through image recognition.

[0086] The online ash content detection device provided by the embodiment of the utility model is as follows: Figures 1 to 4 As shown, it also includes a support frame 21 and a connecting rod 22; the box body 1 is connected to the support frame 21 through the connecting rod 22; the length of the connecting rod 22 is adjustable, and the connecting rod 22 and the box body 1, as well as the connecting rod 22 and the support frame 21 are all rotatably connected.

[0087] In this embodiment, the support frame 21 is used to support the box 1 so that the box can be located above the conveyor belt. The support frame 21 has four legs, which are arranged on the ground. The box 1 is connected to the support frame 21 through a connecting rod 22. In addition, the box 1 and the connecting rod 22, as well as the support frame 21 and the connecting rod 22, are all rotatably connected. In this way, it can play a certain buffering role when the height of coal on the conveyor belt is too high, reduce the vibration when the box 1 touches the coal, and avoid damage to the equipment inside the box 1.

[0088] In addition, the length of the connecting rod 22 can be adjusted to adjust the distance between the detection probe and the conveyor belt, so as to adapt to different detection environments and improve the practicability of the online ash detection device.

[0089] Optionally, in this embodiment, a stud bolt is provided on the connecting rod 22, and the length of the connecting rod 22 can be adjusted by screwing the stud bolt.

[0090] It can be understood that, in the present embodiment, the connecting rod 22 can also be a telescopic cylinder such as a pneumatic cylinder, an oil cylinder or an electric cylinder, which can also achieve the purpose of adjusting the length of the connecting rod 22.

[0091] Optionally, in this embodiment, bearings are provided at both ends of the connecting rod 22, and rotating shafts corresponding to the connecting rod 22 are provided on the box body 1 and the supporting frame 21. The rotating shaft cooperates with the bearings to achieve a rotating connection between the connecting rod 22 and the box body 1, and between the connecting rod 22 and the supporting frame 21.

[0092] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0093] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit 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. An online ash content detection device, characterized in that: include: A detection probe and a box (1) arranged above a coal conveying belt; The box body (1) has a contact surface (114) facing the conveyor belt and in contact with the coal, the contact surface (114) is provided with a recessed structure (111), and the recessed structure (111) is provided with a first through hole (112) connecting the interior of the box body (1) with the outside; The detection probe is arranged in the box body (1), and the detection probe detects the ash content of the coal located at the recessed structure (111) on the conveyor belt through the first through hole (112).

2. The online ash content detection device according to claim 1, characterized in that: The contact surface (114) is a smooth plane.

3. The online ash content detection device according to claim 1, characterized in that: The recessed structure (111) is a groove provided on the contact surface (114), and the first through hole (112) is provided on the bottom wall of the groove.

4. The online ash content detection device according to claim 1, characterized in that: A shoveling structure is provided at the front end of the contact surface (114).

5. The online ash content detection device according to claim 4, characterized in that: The box body (1) comprises a first bottom plate (11), and the surface of the first bottom plate (11) facing the conveyor belt is the contact surface (114); The shoveling structure comprises a first baffle (12) and a second baffle (13); The first baffle plate (12) and the second baffle plate (13) are connected, and the lower ends of the first baffle plate (12) and the second baffle plate (13) are both connected to the front end of the first bottom plate (11); The first baffle plate (12) and the second baffle plate (13) are arranged to be inclined along the front-rear direction, and / or the first baffle plate (12) and the second baffle plate (13) are arranged to be inclined along the up-down direction.

6. The online ash content detection device according to any one of claims 1 to 5, characterized in that: A first protective film is provided at the first through hole (112).

7. The online ash content detection device according to claim 6, characterized in that: A second through hole (113) is also provided in the recessed structure (111); The second through hole (113) is spaced apart from the first through hole (112), and the second through hole (113) is located at the front end of the first through hole (112); A first monitoring component is provided in the box body (1), and a second protective film made of the same material as the first protective film is provided at the second through hole (113), and the first monitoring component is used to monitor the damage state of the second protective film.

8. The online ash content detection device according to claim 7, characterized in that: The thickness of the second protective film is smaller than the thickness of the first protective film.

9. The online ash content detection device according to claim 1, characterized in that: Also includes a second monitoring device and a controller; The second monitoring component is electrically connected to the controller, and is used to monitor the conveying status of the coal on the conveyor belt. The controller controls the operating status of the online ash detection device according to the detection result of the second monitoring component.

10. The online ash content detection device according to claim 1, characterized in that: It also includes a support frame (21) and a connecting rod (22); The box body (1) is connected to the support frame (21) via a connecting rod (22); The length of the connecting rod (22) can be adjusted, and the connecting rod (22) and the box body (1), as well as the connecting rod (22) and the supporting frame (21) are all rotatably connected.

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