Pulverized coal fineness online detection device and method

Abstract

The invention belongs to the field of pulverized coal detection, and particularly discloses a pulverized coal fineness online detection device and method, and the pulverized coal fineness online detection device comprises a detection mechanism and a self-locking mechanism; the detection mechanism comprises an arc-shaped plate, an acoustic emission sensor is arranged at the top of the arc-shaped plate, and the acoustic emission sensor penetrates through the arc-shaped plate and is provided with a waveguide rod; the self-locking mechanism comprises a support arranged at the bottom of the arc-shaped plate and a pull rod movably arranged on the arc-shaped plate, a sleeve is arranged at the bottom of the support, a limiting frame is movably arranged on the sleeve, a swing arm is movably arranged on the support, and a movable rod is movably arranged at the rear end of the limiting frame. By simply pulling the pull rod, up-down movement of the pull rod can be ingeniously converted into rotary swing of the swing arm and then further converted into linear movement of the limiting frame, so that the limiting frame quickly moves out of the opening range of the pulverized coal pipeline and is in close contact with the inner wall of the pipeline, and stable limiting of the device is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of pulverized coal detection, and particularly relates to an on-line detection device and method for pulverized coal fineness. Background Technique

[0002] In many industrial productions using pulverized coal as fuel, such as thermal power generation and iron and steel smelting, pulverized coal fineness is a key parameter; appropriate pulverized coal fineness can ensure full combustion of pulverized coal, improve energy utilization efficiency, and reduce pollutant emissions.

[0003] Currently, the detection methods for pulverized coal fineness mainly include off-line screening method and on-line detection method; the off-line screening method requires regular sampling from the pulverized coal pipeline and then screening analysis in the laboratory. This method is cumbersome to operate and has a long detection cycle, and cannot reflect the change of pulverized coal fineness in real time; while the existing on-line detection devices can detect in real time, but there are some problems in installation and fixation.

[0004] Some devices are fixed on the pulverized coal pipeline by bolt connection, which will cause physical damage to the pipeline, affecting the service life and sealing performance of the pipeline. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line detection device and method for pulverized coal fineness to solve the problem of physical damage to the pipeline caused by bolt connection in the above-mentioned background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An on-line detection device for pulverized coal fineness includes a detection mechanism and a self-locking mechanism; the detection mechanism includes an arc-shaped plate, and an acoustic emission sensor is arranged on the top of the arc-shaped plate, and a waveguide rod penetrates through the arc-shaped plate; the self-locking mechanism includes a bracket arranged at the bottom of the arc-shaped plate, a pull rod movably arranged on the arc-shaped plate, a sleeve arranged at the bottom of the bracket, a limit frame movably arranged on the sleeve, a swing arm movably arranged on the bracket, a movable rod movably arranged at the rear end of the limit frame, the swing arm is sleeved with the movable rod, and the bottom of the pull rod is movably connected with the swing arm through a movable frame.

[0008] Preferably, the limit frame and the sleeve are inclined, and the rear end of the limit frame is inclined upward.

[0009] Preferably, an arc-shaped edge is arranged on the surface of the rear end of the limit frame, the arc-shaped edge is adapted to the inner wall of the pulverized coal pipeline, a groove is arranged at the front end of the limit frame, and the groove is adapted to the waveguide rod.

[0010] Preferably, a nut is threadedly connected to the pull rod on the top of the arc-shaped plate through a threaded groove, and a support cylinder is arranged at the bottom of the nut surrounding the pull rod.

[0011] Preferably, two self-locking mechanisms are provided. The two self-locking mechanisms are respectively located on both sides of the acoustic emission sensor, and a grip is provided between the two pull rods.

[0012] Preferably, a sealing block is provided at the bottom of the arc-shaped plate, and the sealing block is adapted to the opening of the pulverized coal pipeline.

[0013] Preferably, the detection device further includes a self-checking mechanism. A housing is provided on the arc-shaped plates on both sides of the sealing block. A movable seat is movably provided in the housing. The bottom of the movable seat is connected with a pressing block through a transmission member penetrating the arc-shaped plate. A spring is provided between the pressing block and the arc-shaped plate. A plurality of indicator lights are provided on the housing. The indicator lights penetrate the housing and are provided with contact pieces II. A contact piece I is provided on the movable seat, and the contact piece I is adapted to the contact piece II.

[0014] Preferably, the transmission member includes a first toothed plate provided on the pressing block. A small gear is movably provided in the housing. Large gears are provided at both ends of the small gear. A second toothed plate is provided on the movable seat on the same side as the first toothed plate. The first toothed plate is meshed with the small gear, and the second toothed plate is meshed with the large gear.

[0015] Preferably, a power supply terminal is provided at the top of the housing, and the power supply terminal is electrically connected to the contact piece I through a wire.

[0016] A detection method for an on-line detection device for pulverized coal fineness includes:

[0017] S1. Preset an opening adapted to the sealing block on the pulverized coal pipeline. After the sealing block is clamped into the opening of the pulverized coal pipeline, use the self-locking mechanism to lock it to complete the connection between the acoustic emission sensor and the pulverized coal pipeline;

[0018] S2. The acoustic emission sensor allows pulverized coal particles to collide with it through the waveguide rod to generate an acoustic emission signal. Each pulverized coal particle hitting the waveguide rod can generate a clear vibration wave and be converted into a voltage signal. The voltage value is linear with the momentum of the pulverized coal impact;

[0019] S3. Through calibration, the voltage value and the momentum value are corresponding one by one, and the diameter fineness of the particles is calculated to complete the detection of the pulverized coal fineness.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] By simply pulling the pull rod, the present invention can ingeniously convert the up-and-down movement of the pull rod into the rotational swing of the swing arm, and further convert it into the linear movement of the limit frame, enabling the limit frame to quickly move out of the opening range of the pulverized coal pipeline and closely contact the inner wall of the pipeline, realizing the stable limit of the device. It abandons the traditional bolt connection method, avoids physical damage to the pulverized coal pipeline, extends the service life of the pipeline, and converts it into a protective state for the waveguide rod when removed, without special adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the bottom view of the present invention;

[0025] Figure 3 is the internal structural schematic diagram of the present invention;

[0026] Figure 4 is the structural schematic diagram of the self-locking mechanism of the present invention;

[0027] Figure 5 is the structural schematic diagram of the self-checking mechanism of the present invention;

[0028] Figure 6 is the structural schematic diagram of the transmission part of the present invention;

[0029] Figure 7 is the block diagram of the method steps of the present invention.

[0030] In the figure: 1, detection mechanism; 101, arc plate; 102, sealing block; 103, acoustic emission sensor; 104, waveguide rod; 2, self-locking mechanism; 201, bracket; 202, sleeve; 203, limit frame; 2031, groove; 2032, arc edge; 204, pull rod; 2041, handle; 2042, nut; 2043, thread groove; 2044, support cylinder; 205, movable frame; 206, swing arm; 207, movable rod; 3, self-checking mechanism; 301, housing; 302, extrusion block; 303, movable seat; 3031, power supply end; 3032, wire; 304, spring; 305, transmission part; 3051, first toothed plate; 3052, small gear; 3053, large gear; 3054, second toothed plate; 306, first contact piece; 307, second contact piece; 308, indicator light. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings of the specification.

[0032] In the following description, numerous specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively exclusive embodiments from other embodiments.

[0034] As shown in Figure 1 and 2 and shown in Figure 4 :

[0035] Embodiment 1: This embodiment provides an on-line detection device for pulverized coal fineness, including a detection mechanism 1 and a self-locking mechanism 2; the detection mechanism 1 includes an arc-shaped plate 101, and an acoustic emission sensor 103 is arranged at the top of the arc-shaped plate 101. A waveguide rod 104 is arranged through the arc-shaped plate 101 by the acoustic emission sensor 103; the self-locking mechanism 2 includes a bracket 201 arranged at the bottom of the arc-shaped plate 101, a pull rod 204 movably arranged on the arc-shaped plate 101, a sleeve 202 arranged at the bottom of the bracket 201, a limit frame 203 movably arranged on the sleeve 202, a swing arm 206 movably arranged on the bracket 201, a movable rod 207 movably arranged at the rear end of the limit frame 203, the swing arm 206 is sleeved with the movable rod 207, and the bottom of the pull rod 204 is movably connected to the swing arm 206 through a movable frame 205.

[0036] During operation, an opening is preset on the coal powder pipeline, and the waveguide rod 104 is inserted into the coal powder pipeline through the opening of the coal powder pipeline. After the arc plate 101 contacts and fits with the pipeline, the pull rod 204 is pulled, and a slide groove is arranged on the swing arm 206, and the slide groove is slidably connected with the rotating shaft of the movable frame 205. When the pull rod 204 moves upward, the swing arm 206 is pulled upward through the movable frame 205. Since the front end of the swing arm 206 is movably connected to the bracket 201, when the pull rod 204 moves upward, the movable frame 205 will slide on the slide groove. The pull rod 204 slides and rotates in the groove, thereby converting the up and down movement of the pull rod 204 into a rotational swinging movement of the swing arm 206 on the bracket 201. When the swing arm 206 swings upward, since the front end of the swing arm 206 is connected to the limit frame 203 through the sleeved movable rod 207, the limit frame 203 will be driven to move synchronously, and the sleeve 202 will limit the position of the limit frame 203 so that it can only slide under the limit guide of the sleeve 202, so that when the swing arm 206 swings, the movable rod 207 will be The swing arm 206 is telescopically moved in the swing arm 206 by increasing the distance between the connection between the swing arm 206 and the limit frame 203 and the connection between the swing arm 206 and the bracket 201, thereby extending the length of the swing arm 206 and converting the rotational motion of the swing arm 206 into a linear motion of the limit frame 203, so that when the swing arm 206 swings, the limit frame 203 is driven to slide on the sleeve 202 until the limit frame 203 moves out of the opening range of the coal powder pipeline and contacts the inner wall of the pipeline, so as to limit the position of the device. Pressure will be applied to the curved plate 101 to push the curved plate 101 open and cause pipeline leakage, and the limit frame 203 will prevent the curved plate 101 from moving by pressing against the inner wall of the coal powder pipeline, thereby completing the limitation. There is no need to use bolts to connect with the pipeline to cause physical damage, and the opening movement direction of the curved plate 101 is different from the movement direction of the limit frame 203, so that the limit frame 203 will not loosen due to the increase of the opening pressure applied to the curved plate 101 during operation, but will only become more stable due to the increase of the opening pressure.

[0037] Specifically, the limiting frame 203 and the sleeve 202 are arranged to be inclined, and the rear end of the limiting frame 203 is inclined upward.

[0038] By tilting the limit frame 203, the triangle formed is more stable. The opening pressure of the arc plate 101 will act on the bracket 201, the limit frame 203, and the connection between the sleeve 202 and the limit frame 203 at the same time, so that the force is evenly applied and not easily damaged, thereby improving stability.

[0039] As attached Figure 3 and attached Figure 4 As shown:

[0040] Specifically, an arc-shaped edge 2032 is provided on the rear end surface of the limit frame 203. The arc-shaped edge 2032 is adapted to the inner wall of the pulverized coal pipeline. A groove 2031 is provided at the front end of the limit frame 203, and the groove 2031 is adapted to the waveguide rod 104.

[0041] Through the arc-shaped edge 2032, when the limit frame 203 contacts the inner wall of the pipeline, it fits tightly with the inner wall of the pipeline, improving stability. When the device is taken out of the pipeline for maintenance, the limit frame 203 will be reset. Finally, it will be stuck on the waveguide rod 104 through the groove 2031, providing a protective effect on the waveguide rod 104 after the device is taken out of the pipeline. It can be directly placed on the table without worrying about the situation where the waveguide rod 104 is bent and damaged due to collision.

[0042] Specifically, a nut 2042 is threadedly connected to a pull rod 204 at the top of the arc-shaped plate 101 through a threaded groove 2043, and a support cylinder 2044 is provided at the bottom of the nut 2042 surrounding the pull rod 204.

[0043] After pulling the pull rod 204 to complete the limitation of the device, rotate the nut 2042 to make it move horizontally on the pull rod 204 until the support cylinder 2044 contacts the arc-shaped plate 101 to resist the pull rod 204 and limit its position, avoiding the situation where the limit frame 203 is reset due to its downward movement, and achieving a fixing effect;

[0044] The nut 2042 uses the support cylinder 2044 to limit the pull rod 204, so that the nut 2042 does not need to move a long distance, improving work efficiency. Furthermore, the threaded groove 2043 only needs to be provided on the pull rod 204 at the top of the arc-shaped plate 101, avoiding the situation where setting the threaded groove 2043 on the pull rod 204 located in the arc-shaped plate 101 affects the sealing performance.

[0045] Specifically, two self-locking mechanisms 2 are provided. The two self-locking mechanisms 2 are respectively located on both sides of the acoustic emission sensor 103, and a handle 2041 is provided between the two pull rods 204.

[0046] By providing two self-locking mechanisms 2, the self-locking stability is improved, and the two pull rods 204 are connected together by using the handle 2041, enabling the staff to perform the locking operations of the two self-locking mechanisms 2 simultaneously when pushing and pulling the handle 2041, greatly improving work efficiency.

[0047] As shown in Figure 1 、 2 and Figure 4 shown:

[0048] Embodiment 2: This embodiment provides an on-line coal powder fineness detection device, which includes a detection mechanism 1 and a self-locking mechanism 2; the detection mechanism 1 includes an arc plate 101, and an acoustic emission sensor 103 is arranged at the top of the arc plate 101. A waveguide rod 104 is arranged through the arc plate 101 by the acoustic emission sensor 103; the self-locking mechanism 2 includes a bracket 201 arranged at the bottom of the arc plate 101, a pull rod 204 movably arranged on the arc plate 101, a sleeve 202 is arranged at the bottom of the bracket 201, a limit frame 203 is movably arranged on the sleeve 202, a swing arm 206 is movably arranged on the bracket 201, a movable rod 207 is movably arranged at the rear end of the limit frame 203, the swing arm 206 is sleeved with the movable rod 207, and the bottom of the pull rod 204 and the swing arm 206 are movably connected through a movable frame 205.

[0049] Specifically, the limit frame 203 and the sleeve 202 are arranged obliquely, and the rear end of the limit frame 203 is inclined upward.

[0050] As shown in the attached Figure 3 and attached Figure 4 figures:

[0051] Specifically, an arc edge 2032 is arranged on the rear end surface of the limit frame 203, and the arc edge 2032 is adapted to the inner wall of the coal powder pipeline. A groove 2031 is arranged at the front end of the limit frame 203, and the groove 2031 is adapted to the waveguide rod 104.

[0052] Specifically, a nut 2042 is threadedly connected to the pull rod 204 on the top of the arc plate 101 through a thread groove 2043, and a support cylinder 2044 is arranged at the bottom of the nut 2042 outside the pull rod 204.

[0053] Specifically, two self-locking mechanisms 2 are provided, and the two self-locking mechanisms 2 are respectively located on both sides of the acoustic emission sensor 103, and a handle 2041 is arranged between the two pull rods 204.

[0054] Specifically, a sealing block 102 is arranged at the bottom of the arc plate 101, and the sealing block 102 is adapted to the opening of the coal powder pipeline.

[0055] The sealing block 102 is adapted to the opening of the coal powder pipeline, which improves the sealing performance after installation.

[0056] As shown in the attached Figure 1 、 3 and attached Figure 5 figures:

[0057] Specifically, the detection device further includes a self-check mechanism 3. A housing 301 is provided on the arc-shaped plates 101 on both sides of the sealing block 102. A movable seat 303 is movably arranged in the housing 301. The bottom of the movable seat 303 is connected with a pressing block 302 through a transmission member 305 penetrating through the arc-shaped plate 101. A spring 304 is arranged between the pressing block 302 and the arc-shaped plate 101. A plurality of indicator lights 308 are provided on the housing 301. The indicator lights 308 penetrate through the housing 301 and are provided with a second contact piece 307. A first contact piece 306 is arranged on the movable seat 303. The first contact piece 306 is adapted to the second contact piece 307.

[0058] When the sealing block 102 is inserted into the opening of the pulverized coal pipeline, the arc-shaped plate 101 will contact the outer surface of the pipeline. When contacting, the pressing block 302 will pre-contact the pulverized coal pipeline. At this time, the continuous movement of the arc-shaped plate 101 until it fits the outer surface of the pipeline will cause extrusion on the pressing block 302, so as to squeeze the pressing block 302 into the arc-shaped plate 101. During the process, the pressing block 302 moves upward relative to the arc-shaped plate 101, and then pushes the movable seat 303 to move upward through the transmission member 305. The movable seat 303 is connected to an external power supply. When the first contact piece 306 on the movable seat 303 contacts the corresponding second contact piece 307, the power of the external power supply will be transmitted to the corresponding indicator light 308 to make it light up. A plurality of indicator lights 308 are provided. The positions of the movable seat 303 corresponding to the plurality of indicator lights 308 correspond to the moving distance of the pressing block 302. The staff can judge whether the tightness of the installation of the arc-shaped plate 101 meets the requirements by observing which indicator light 308 lights up, and can quickly find when the arc-shaped plate 101 becomes loose, which is convenient for personnel to check. When the staff separates the device from the pipeline for maintenance, the spring 304 will push the pressing block 302 back to its original position through its own elasticity for the next detection use. When the pressing block 302 returns to its original position, it will drive the movable seat 303 to return to its original position together, and separate from the second contact pieces 307 of all the indicator lights 308, saving power and avoiding reactive consumption.

[0059] As shown in the Figure 6 appendix

[0060] Specifically, the transmission member 305 includes a first toothed plate 3051 arranged on the pressing block 302. A small gear 3052 is movably arranged in the housing 301. Large gears 3053 are arranged at both ends of the small gear 3052. A second toothed plate 3054 is arranged on the movable seat 303 on the same side as the first toothed plate 3051. The first toothed plate 3051 is meshed with the small gear 3052. The second toothed plate 3054 is meshed with the large gear 3053.

[0061] When the extrusion block 302 is extruded and moved, it will drive the first toothed plate 3051 to move synchronously. The first toothed plate 3051 will drive the small gear 3052 to rotate through meshing, and the small gear 3052 will drive the large gear 3053 to rotate synchronously. Furthermore, through the meshing of the large gear 3053 and the second toothed plate 3054, the second toothed plate 3054 together with the movable seat 303 will move upward. Since the first toothed plate 3051 and the second toothed plate 3054 are on the same side, the moving direction of the movable seat 303 is the same as that of the extrusion block 302. And because the diameters of the small gear 3052 and the large gear 3053 are different, when the rotational speeds of the small gear 3052 and the large gear 3053 are constant, the moving distance of the movable seat 303 is greater than that of the extrusion block 302, enabling the staff to arrange more indicator lights 308 to improve the detection fineness, or increase the spacing between adjacent indicator lights 308 to avoid misjudgment by the staff.

[0062] As shown in the Figure 5 and Figure 6 accompanying

[0063] Specifically, a power supply terminal 3031 is provided at the top of the housing 301, and the power supply terminal 3031 is electrically connected to the first contact piece 306 through a wire 3032.

[0064] The power supply terminal 3031 includes a storage battery or is directly electrically connected to an external power supply. When the first contact piece 306 contacts the second contact piece 307, electricity will be transmitted through the power supply terminal 3031, the wire 3032, the first contact piece 306, and the second contact piece 307 to the indicator light 308 to make it light up.

[0065] As shown in the Figure 7 accompanying

[0066] Embodiment 3: A detection method for an on-line coal powder fineness detection device, including:

[0067] S1. Preset an opening on the coal powder pipeline that is adapted to the sealing block 102. After the sealing block 102 is clamped into the opening of the coal powder pipeline, use the self-locking mechanism 2 to lock it to complete the connection of the acoustic emission sensor 103 to the coal powder pipeline.

[0068] S2. The acoustic emission sensor 103 allows coal powder particles to collide with it through the waveguide rod 104 to generate an acoustic emission signal. Each coal powder particle hitting the waveguide rod 104 can generate a clear vibration wave and be converted into a voltage signal. The voltage value is linear with the momentum of the coal powder impact.

[0069] S3. Through calibration, the voltage value and the momentum value are corresponding one by one, and the diameter fineness of the particles is calculated to complete the detection of the coal powder fineness.

[0070] As can be seen from the above, the particle mass m = 4 / 3ρr3, and the density of the coal powder is basically a constant. The diameter of the particle can be calculated through calculation.

[0071] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those skilled in the art who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clauses are intended to cover the structures that perform the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Accordingly, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0072] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to the implementation of the present invention).

[0073] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development efforts will be a routine task of design, manufacturing and production without excessive experimentation.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An on-line detection device for pulverized coal fineness, characterized in that, It includes a detection mechanism (1) and a self-locking mechanism (2); The detection mechanism (1) includes an arc-shaped plate (101). At the top of the arc-shaped plate (101), there is an acoustic emission sensor (103). The acoustic emission sensor (103) is provided with a waveguide rod (104) penetrating through the arc-shaped plate (101); The self-locking mechanism (2) includes a bracket (201) arranged at the bottom of the arc-shaped plate (101), a pull rod (204) movably arranged on the arc-shaped plate (101). At the bottom of the bracket (201), there is a sleeve (202). A limit frame (203) is movably arranged on the sleeve (202). A swing arm (206) is movably arranged on the bracket (201). At the rear end of the limit frame (203), there is a movable rod (207). The swing arm (206) is sleeved with the movable rod (207). Between the bottom of the pull rod (204) and the swing arm (206), there is a movable connection through a movable frame (205).

2. The on-line coal powder fineness detection device according to claim 1, characterized in that, The limit frame (203) and the sleeve (202) are arranged obliquely, and the rear end of the limit frame (203) is inclined upward.

3. The on-line coal powder fineness detection device according to claim 1, characterized in that, On the rear end surface of the limit frame (203), there is an arc-shaped edge (2032), which is adapted to the inner wall of the pulverized coal pipeline. At the front end of the limit frame (203), there is a groove (2031), which is adapted to the waveguide rod (104).

4. An on-line detection device for pulverized coal fineness according to claim 1, characterized in that On the pull rod (204) at the top of the arc-shaped plate (101), there is a nut (2042) threadedly connected through a threaded groove (2043). At the bottom of the nut (2042) surrounding the pull rod (204), there is a support cylinder (2044).

5. The on-line detection device for pulverized coal fineness according to claim 1, characterized in that, There are two self-locking mechanisms (2). The two self-locking mechanisms (2) are respectively located on both sides of the acoustic emission sensor (103). Between the two pull rods (204), there is a grip (2041).

6. The on-line detection device for pulverized coal fineness according to claim 1, characterized in that, At the bottom of the arc-shaped plate (101), there is a sealing block (102), which is adapted to the opening of the pulverized coal pipeline.

7. An on-line coal powder fineness detection device according to claim 6, characterized in that, The detection device further includes a self-checking mechanism (3). On the arc-shaped plate (101) on both sides of the sealing block (102), there is a housing (301). Inside the housing (301), there is a movable seat (303). At the bottom of the movable seat (303), there is an extrusion block (302) connected through a transmission member (305) penetrating through the arc-shaped plate (101). Between the extrusion block (302) and the arc-shaped plate (101), there is a spring (304). On the housing (301), there are multiple indicator lights (308). The indicator lights (308) are provided with contact pieces two (307) penetrating through the housing (301). On the movable seat (303), there is a contact piece one (306), and the contact piece one (306) is adapted to the contact piece two (307).

8. An on-line detection device for pulverized coal fineness according to claim 7, characterized in that, The transmission member (305) includes a first toothed plate (3051) provided on the extrusion block (302). A pinion (3052) is movably provided in the housing (301). Large gears (3053) are provided at both ends of the pinion (3052). A second toothed plate (3054) is provided on the movable seat (303) on the same side of the first toothed plate (3051). The first toothed plate (3051) meshes with the pinion (3052), and the second toothed plate (3054) meshes with the large gear (3053).

9. An on-line detection device for pulverized coal fineness according to claim 7, characterized in that, A power supply terminal (3031) is provided at the top of the housing (301), and the power supply terminal (3031) is electrically connected to the first contact piece (306) through a wire (3032).

10. The detection method of an on-line detection device for pulverized coal fineness according to any one of claims 1-9, characterized in that, Including: S1. Preset an opening on the pulverized coal pipeline that fits the sealing block (102). After the sealing block (102) is inserted into the opening of the pulverized coal pipeline, use the self-locking mechanism (2) to lock it, and complete the connection between the acoustic emission sensor (103) and the pulverized coal pipeline; S2. The acoustic emission sensor (103) allows pulverized coal particles to collide with it through the waveguide rod (104) to generate acoustic emission signals. Each pulverized coal particle hitting the waveguide rod (104) can generate a clear vibration wave and convert it into a voltage signal. The voltage value is linear with the momentum of the pulverized coal impact; S3. Through calibration, the voltage value and the momentum value are corresponded one by one, calculate the diameter fineness of the particles, and complete the detection of the pulverized coal fineness.

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