Triggering mechanism and pebble coal cleaning device in air chamber

Abstract

The utility model discloses a trigger mechanism and a pebble coal cleaning device in an air chamber, and relates to the technical field of raw coal grinding, the pebble coal cleaning device comprises a limiting unit, the limiting unit comprises a mounting sleeve, a rotating shaft arranged on the inner side of the mounting sleeve, and a trigger piece arranged on the inner side of the mounting sleeve in a penetrating manner; the pressure sensor is detachably mounted on one side of the mounting sleeve and can abut against the triggering piece; and the triggering piece abuts against the pressure sensor and transmits a pressure signal, so that the condition of pebble coal can be mastered conveniently. When the scraping plate is subjected to certain resistance, the rotating shaft can be driven to turn over, so that the pressure sensor can be triggered through the positioning piece, a pressure signal is transmitted to a worker, and the worker can know the condition of pebble coal in the air chamber conveniently; and large pebble coal can be quickly cleaned, so that the pebble coal is effectively prevented from being accumulated at the bottom of the air chamber to damage equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of raw coal grinding, especially a trigger mechanism and stone coal cleaning device in air chamber. BACKGROUND

[0002] Medium-speed coal mill is the core equipment of coal-fired power generation and industrial fuel preparation system, mainly used for grinding raw coal into fine coal powder meeting the requirements of boiler combustion; its working principle is based on the synergistic effect of grinding and drying, through motor driving grinding disc rotation, cooperating with hydraulic loading grinding roller to apply grinding pressure on coal blocks, combining with hot air system to dry and convey coal powder, realizing integrated process of "grinding-drying-classification".

[0003] In the running process of the coal mill, a small amount of stone coal that cannot be completely crushed will gradually accumulate at the bottom of the inside of the primary air chamber; since raw coal often contains impurities with high hardness, large block-shaped stone coal may still be formed after grinding, which is easy to block the discharge channel at the bottom of the air chamber and hinder the normal operation of the cleaning mechanism; when the accumulation exceeds the critical value, not only will the grinding resistance of the grinding disc and the grinding roller increase, causing the coal mill drive motor to overload, but also the airflow in the air chamber may be turbulent, causing problems such as belt deviation and material accumulation at the discharge port, and in severe cases, even causing abnormal vibration or bearing damage, directly affecting the stability and safety of equipment operation. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the technical problem to be solved by the utility model lies in that the existing stone coal trigger inside the air chamber cannot respond in time.

[0005] The above technical problem is solved by the following technical scheme: the utility model provides a trigger mechanism, which comprises a limiting unit, the limiting unit comprises a mounting sleeve, a rotating shaft arranged on the inside of the mounting sleeve, and a trigger arranged on the inside of the mounting sleeve;

[0006] The trigger comprises a supporting rod, a partition plate arranged on the outer wall of the supporting rod, a limiting rod arranged at the end of the supporting rod, and a reset member arranged on the outer wall of the supporting rod.

[0007] In a preferred embodiment of the trigger mechanism of the utility model: the mounting sleeve comprises a protrusion arranged on the side wall thereof, and the inside of the protrusion is hollow;

[0008] The supporting rod penetrates the protrusion and extends to the outside thereof;

[0009] One end of the reset member abuts against the partition plate, and the other end abuts against the inner wall of the protrusion.

[0010] In a preferred embodiment of the trigger mechanism of the utility model: the rotating shaft comprises a groove arranged on the side wall thereof;

[0011] The limiting rod is matched with the groove;

[0012] The end of the limiting rod extends to the inside of the groove, thereby realizing the position fixation between the mounting sleeve and the rotating shaft.

[0013] In a preferred embodiment of the trigger mechanism, the rotating shaft comprises a groove opened in the side wall thereof;

[0014] The limiting rod is matched with the groove;

[0015] The end of the limiting rod extends to the inside of the groove, thereby realizing the position fixation between the mounting sleeve and the rotating shaft.

[0016] The beneficial effects of the present application are as follows: when the scraper encounters resistance during operation, the trigger will be affected, thereby further controlling the trigger to touch the pressure sensor, so as to achieve the purpose of alarming the staff, so that the staff can more timely understand the situation of the stone coal in the wind chamber.

[0017] Therefore, the technical problem to be solved by the present application is that the existing stone coal accumulation in the wind chamber cannot be cleaned in time, which leads to the problem of easy equipment failure.

[0018] The above technical problems are solved by the following technical solutions: the present application provides a stone coal cleaning device in a wind chamber, which comprises a wind chamber body, an internal grinding roller, a storage channel O formed between the wind chamber body and the grinding roller, a rotating shaft arranged in the storage channel O, a mounting sleeve arranged on the rotating shaft, a limiting rod arranged on the mounting sleeve, and a groove opened in the side wall of the rotating shaft.

[0019] A pressure sensor comprising a contact arranged at the end thereof, and a pressing plate for pressing the contact;

[0020] The pressing plate can press the contact, thereby realizing the transmission of the pressure signal;

[0021] The mounting sleeve is detachably mounted on the side wall of the grinding roller;

[0022] The rotating shaft is provided with a scraper on the outside thereof, and the scraper is matched with the storage channel O.

[0023] In a preferred embodiment of the stone coal cleaning device in the wind chamber, the wind chamber body comprises a discharge pipe opened in the bottom thereof;

[0024] The scraper rotates synchronously with the grinding roller, thereby being capable of conveying the stone coal to the discharge pipe.

[0025] In a preferred embodiment of the stone coal cleaning device in the wind chamber, the partition plate abuts against the pressing plate,

[0026] The pressing plate is deformed along the bending position, and the pressing plate is pressed by the partition plate and can be in contact with the contact.

[0027] In a preferred embodiment of the stone and coal cleaning device in the air chamber, the limiting rod end can be in contact with the outer wall of the rotating shaft, and the rotating shaft is movably connected with the mounting sleeve.

[0028] The partition plate is staggered with the pressing plate.

[0029] In a preferred embodiment of the stone and coal cleaning device in the air chamber, the air chamber body comprises a discharge pipeline formed in the bottom thereof.

[0030] The scraper is synchronously rotated with the grinding roller, and the stone and coal can be conveyed to the discharge pipeline.

[0031] In a preferred embodiment of the stone and coal cleaning device in the air chamber, the scraper can be flush with the bottom surface of the air chamber body at the bottom wall under the action of gravity.

[0032] The beneficial effects of the present application are as follows: when the scraper is subjected to a certain resistance, the rotating shaft is turned over, so that the positioning member triggers the pressure sensor, and the pressure signal is transmitted to the worker, so that the worker can understand the situation of the stone and coal in the air chamber; the large stone and coal can be quickly cleaned, thereby effectively avoiding the accumulation of stone and coal at the bottom of the air chamber and causing damage to the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application. Among them:

[0034] Figure 1 A three-dimensional structure schematic diagram of the primary air chamber is shown;

[0035] Figure 2 A half-sectional view of the primary air chamber is shown;

[0036] Figure 3 A connection structure schematic diagram of the mounting sleeve and the rotating shaft is shown;

[0037] Figure 4 A partial sectional view of the mounting sleeve is shown;

[0038] Figure 5 A partial enlarged view of A in Figure 4

[0039] Figure 6 ​A schematic view of a connection structure of the scraper and the rotating shaft is shown.

[0040] Figure 7 A schematic view of a connection structure of the scraper and the rotating shaft is shown. Figure 6 A partial enlarged view of B of the connection structure of the scraper and the rotating shaft is shown. DETAILED DESCRIPTION

[0041] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with specific embodiments and drawings.

[0042] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions of the present application, but the terms can be changed according to the intention of the person skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as mere names, but based on the meanings of the terms and the overall description of the present application.

[0043] Referring to Figures 3-7 , the present embodiment provides a trigger mechanism, comprising, a limiting unit 1 is composed of a mounting sleeve 11, a rotating shaft 12 and a trigger 13, the rotating shaft 12 is coaxially installed on the inside of the mounting sleeve 11, the trigger 13 penetrates the rotating shaft 12 and extends to the outside of the mounting sleeve 11, and a pressing plate is arranged on the side wall of the trigger 13 for dynamic contact with a pressure sensor 2;

[0044] The pressure sensor 2 is detachably installed on the lateral interface of the mounting sleeve 11 through a buckle structure, and the sensing surface of the pressure sensor 2 is in pre-pressing contact with the pressing plate of the trigger 13;

[0045] When the stone coal is stuck in the pipeline, it will push the scraper to overturn, the scraper overturns and drives the rotating shaft 12 to rotate, when the rotating shaft 12 overturns to an appropriate angle, the trigger 13 is pushed by the elastic force of the reset member, so that the trigger 13 moves towards the rotating shaft 12, and then the pressing plate connected to the outside of the trigger 13 will abut against the contact of the pressure sensor 2, and then through the signal transmitted by the pressure sensor 2, the staff can know the situation of the stone coal blockage in the air chamber, so as to make corresponding action.

[0046] In the present embodiment, the pressure sensor 2 is installed by a quick-release buckle, which can be replaced or calibrated without tools, improving the equipment maintenance efficiency; the inner wall of the mounting sleeve 11 is provided with a self-lubricating coating, reducing the friction loss of the rotating shaft 12 and ensuring the action sensitivity of the trigger 13.

[0047] Reference Figure 6 and Figure 7As an optional embodiment, the mounting sleeve 11 comprises a protrusion 111 provided on the side wall of the mounting sleeve 11, and the protrusion 111 is hollow inside; the trigger piece 13 comprises a supporting rod 131, a partition plate 132 provided on the outer wall of the supporting rod 131, a limiting rod 133 provided on the end of the supporting rod 131, and a reset piece 134 provided on the outer wall of the supporting rod 131; the supporting rod 131 penetrates through the protrusion 111 and extends to the outside of the protrusion 111; one end of the reset piece 134 abuts against the partition plate 132, and the other end abuts against the inner wall of the protrusion 111.

[0048] In the embodiment, the mounting sleeve 11 has a circular ring structure, and the outer wall of the mounting sleeve 11 is provided with the protrusion 111; and the protrusion 111 is hollow inside, which provides sufficient movement space for the trigger piece 13 and ensures that the trigger piece 13 is installed at the position of the side wall of the protrusion 111.

[0049] It should be noted that the supporting rod 131 and the partition plate 132 are welded and fixed, and when the supporting rod 131 moves towards the rotation shaft 12, the side wall of the partition plate 132 abuts against the contact of the pressure sensor 2, so as to trigger the signal of the pressure sensor 2.

[0050] Further, the reset piece 134 is sleeved on the outside of the supporting rod 131, and the elastic potential energy released by the reset piece 134 can push the limiting rod 133 to move towards the rotation shaft 12, and in the normal state, the reset piece 134 is in a compressed state; and then the reset piece 134 is compressed to store energy, so as to facilitate the movement of the supporting rod 131 at the appropriate position.

[0051] Reference Figure 4 and Figure 5 In some embodiments, the pressure sensor 2 comprises a contact 21 provided on the end of the pressure sensor 2, and a pressing plate 22 for pressing the contact 21; the pressing plate 22 can press the contact 21, so as to realize the transmission of the pressure signal.

[0052] In the embodiment, the pressure sensor 2 is further refined, and the pressure sensor 2 is divided into two parts of the contact 21 and the pressing plate 22; the pressing plate 22 is fixed on the end surface of the pressure sensor 2 in a detachable manner, and the pressing plate 22 has a certain deformation ability; when subjected to external pressure, the pressing plate 22 deforms towards the side close to the contact 21, so as to abut against the contact 21 through the pressing plate 22, and achieve the purpose of triggering the pressure sensor 2.

[0053] Reference Figures 4-7 In some embodiments, the rotation shaft 12 comprises a groove 121 opened on the side wall of the rotation shaft 12; the limiting rod 133 is matched with the groove 121; the end of the limiting rod 133 extends to the inside of the groove 121, so as to realize the position fixation between the mounting sleeve 11 and the rotation shaft 12.

[0054] In this embodiment, the side wall of the rotating shaft 12 is provided with a groove 121, and the position of the groove 121 is matched with the limiting rod 133, and the partition plate 132 separates the support rod 131 and the limiting rod 133; the reset member 134 pushes the limiting rod 133 to penetrate the mounting sleeve 11 and is clamped into the inside of the groove 121 during the release of the elastic potential energy, thereby providing a certain movement space for the partition plate 132, so that the limiting rod 133 can move towards the rotating shaft 12, and the partition plate 132 will gradually compress the pressing plate 22 during the movement, and the end of the pressing plate 22 will abut against the contact 21 after being extruded, thereby realizing the transmission of the pressure signal.

[0055] In use, the scraper moves along the bottom of the air chamber, and when the large stone coal interferes with the movement of the scraper, the scraper is affected by the stone coal and turns over along the axis direction of the rotating shaft 12; during the turning over of the rotating shaft 12, the end of the limiting rod 133 abuts against the side wall of the rotating shaft 12, the side wall of the rotating shaft 12 extrudes the limiting rod 133 and makes the reset member 134 in a compressed energy storage state; when the position of the groove 121 corresponds to the position of the limiting rod 133, the reset member 134 releases the elastic potential energy and pushes the limiting rod 133 to move, so that the limiting rod 133 is clamped into the inside of the groove 121, thereby fixing the position between the rotating shaft 12 and the mounting sleeve 11; at the same time, the partition plate 132 moves synchronously with the limiting rod 133, and the partition plate 132 extrudes the pressing plate 22 during the movement, and the extruded pressing plate 22 deforms, and as the deformation amount of the pressing plate 22 gradually increases, the pressing plate 22 triggers the contact 21, and then the pressure sensor 2 transmits the signal to the external alarm device, so that the work can act on the corresponding reaction more quickly.

[0056] Reference Figure 3 In an embodiment provided in the present application, the end of the limiting rod 133 can abut against the outer wall of the rotating shaft 12, and the rotating shaft 12 is movably connected with the mounting sleeve 11; the partition plate 132 is misaligned with the position of the pressing plate 22.

[0057] In this embodiment, the limiting rod 133 abuts against the outer wall of the rotating shaft 12, and the extrusion of the limiting rod 133 by the rotating shaft 12 makes the reset member 134 in a compressed energy storage state, thereby better facilitating the work personnel to complete the release of the limiting rod 133 at a suitable position.

[0058] Further, during the abutting process of the limiting rod 133 and the outer wall of the rotating shaft 12, the partition plate 132 is located on one side of the pressing plate 22, and at this time the partition plate 132 does not contact the pressing plate 22, so that the pressure sensor 2 is not triggered.

[0059] Reference Figure 1 and Figure 2The embodiment provides a stone coal cleaning device in a wind chamber, which comprises a wind chamber body 3, a grinding roller 4 is arranged in the wind chamber body 3, a storage channel O is formed between the wind chamber body 3 and the grinding roller 4; a mounting sleeve 11 is detachably mounted on the side wall of the grinding roller 4; a scraping plate 14 is mounted on the outer side of a rotating shaft 12, and the scraping plate 14 is matched with the storage channel O.

[0060] In the embodiment, the grinding roller 4 is arranged in the wind chamber body 3, and a storage channel O is formed between the grinding roller 4; the structure of the storage channel O is matched with the rotating path of the grinding roller 4, and is used for temporarily storing and guiding the material flow; by optimizing the cross-sectional shape and spatial layout of the storage channel O, the material accumulation can be effectively reduced, and the efficiency reduction caused by local blockage can be avoided; the wind chamber body 3 is designed in an integrated forming mode, the inner wall is smooth and transitioned, and the material flow resistance is further reduced.

[0061] Further, the mounting sleeve 11 is detachably mounted on the side wall of the grinding roller 4 through clamping or bolt connection; the mounting sleeve 11 can be quickly disassembled for maintenance or replacement, the grinding roller 4 does not need to be disassembled as a whole, the downtime is significantly shortened; the side wall of the mounting sleeve 11 is further provided with a reinforcing rib structure, so that the stability of the connection between the mounting sleeve 11 and the grinding roller 4 is ensured, and the loosening problem caused by long-term vibration is avoided.

[0062] The scraping plate 14 is fixedly mounted on the outer side of the rotating shaft 12, and the profile of the scraping plate 14 is matched with the shape of the inner wall of the storage channel O. When the rotating shaft 12 drives the scraping plate 14 to rotate, the scraping plate 14 can slide along the inner wall of the storage channel O, continuously clean the attached material, and prevent the channel from being blocked; the scraping plate 14 is made of wear-resistant composite material, and the edge is designed in an arc transition, so that the shearing force on the material is reduced, and the service life is prolonged.

[0063] The scraping plate 14 can be replaced by a multi-section structure, and the sections are connected through hinge pieces, so as to adapt to the complex curved surface of the storage channel O. In addition, an observation window (not shown in the figure) can be additionally arranged on the outer side of the wind chamber body 3, so that the material state of the storage channel O can be monitored in real time, and the operation parameters can be adjusted in time.

[0064] Reference Figures 4-7 As an optional embodiment, the wind chamber body 3 comprises a discharge pipe 31 arranged at the bottom of the wind chamber body 3; the scraping plate 14 rotates synchronously with the grinding roller 4, so that the stone coal can be conveyed to the discharge pipe 31.

[0065] In the embodiment, the bottom of the wind chamber body 3 is provided with the discharge pipe 31, and the discharge pipe 31 is communicated with the end of the storage channel O; by optimizing the inclination and cross-sectional shape of the discharge pipe 31, the material can be guided to flow naturally along the preset direction, and the stagnation problem caused by uneven gravity distribution can be avoided; the inner wall of the discharge pipe 31 is treated by a wear-resistant coating, so that the friction loss in the material conveying process is further reduced.

[0066] The scraper 14 is fixedly installed on the outer side of the rotating shaft 12, and the rotating shaft 12 is connected with the driving mechanism of the grinding roller 4 through a transmission assembly not shown in the figure. When the grinding roller 4 rotates, the rotating shaft 12 drives the scraper 14 to rotate synchronously. The rotating track of the scraper 14 matches the profile of the storage channel O, so that it continuously pushes the stone coal in the storage channel O to the direction of the discharge pipeline 31 during rotation, realizing the automatic conveying of the material.

[0067] Under the synchronous action of the grinding roller 4 and the scraper 14, the stone coal in the storage channel O is uniformly scraped and gradually gathered to the discharge pipeline 31. The outlet end of the discharge pipeline 31 can be connected with an external collecting device or a conveying belt according to actual needs, forming a continuous discharging process. This design not only reduces the frequency of manual cleaning, but also avoids the influence of material accumulation on the running efficiency of the equipment, and is especially suitable for high-dust and high-wear industrial environments.

[0068] Reference Figures 4-6 In an embodiment provided in the present application, the scraper 14 can be flush with the bottom surface of the air chamber body 3 under the action of gravity.

[0069] In the embodiment, the scraper 14 is detachably connected with the rotating shaft 12, and the scraper 14 can rotate synchronously with the rotating shaft 12; in the normal state, the surface of the scraper 14 is perpendicular to the ground, and the stone coal can be pushed to move by moving the scraper 14 along with the grinding roller 4.

[0070] Further, after the stone coal is stuck in the air chamber body 3, the scraper 14 is limited during movement along with the grinding roller 4, so that the rotating shaft 12 is flipped along the axis direction of the mounting sleeve 11. When the rotating shaft 12 is flipped to a certain angle, the limiting rod 133 corresponds to the position of the groove 121, the elastic potential energy of the reset member 134 is released to push the limiting rod 133 to approach the inside of the groove 121, and the limiting rod 133 cooperates with the groove 121, so that the position between the scraper 14 and the mounting sleeve 11 is fixed. At this time, the scraper 14 is in an inclined state and moves along with the grinding roller 4, and the angle of the scraper 4 is fixed. The pressing plate 22 is controlled to extrude the contact 21, and then the pressure sensor 2 is triggered, so that the pressure signal is transmitted to the alarm device through the pressure sensor 2, and then the worker can understand the situation in the air chamber body 3. At this time, the worker can make corresponding response according to the specific situation.

[0071] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present application.

Claims

1. A triggering mechanism, characterized in that: include, The limiting unit (1) includes a mounting sleeve (11), a rotating shaft (12) disposed inside the mounting sleeve (11), and a trigger (13) passing through the inside of the mounting sleeve (11). The triggering element (13) includes a support rod (131), a partition (132) disposed on the outer wall of the support rod (131), a limiting rod (133) disposed at the end of the support rod (131), and a reset element (134) disposed on the outer wall of the support rod (131).

2. The triggering mechanism according to claim 1, characterized in that: The mounting sleeve (11) includes a protrusion (111) disposed on its side wall, the protrusion (111) being hollow inside; The support rod (131) passes through the protrusion (111) and extends to its outer side; One end of the reset member (134) abuts against the partition (132), and the other end abuts against the inner wall of the protrusion (111).

3. The triggering mechanism according to claim 2, characterized in that: It also includes, The rotating shaft (12) includes a groove (121) formed in its side wall; The limiting rod (133) is adapted to the groove (121); The end of the limiting rod (133) extends to the inside of the groove (121), thereby fixing the position between the mounting sleeve (11) and the rotating shaft (12).

4. A device for cleaning stones and coal inside a ventilation chamber, characterized in that: Including any one of the triggering mechanisms of claims 1 to 3, and The air chamber body (3) has a grinding roller (4) installed inside it, and a material storage channel O is formed between the air chamber body (3) and the grinding roller (4); A pressure sensor (2) includes a contact (21) disposed at its end and a pressure plate (22) for pressing the contact (21); The pressure plate (22) can press the contact (21) to transmit the pressure signal; The mounting sleeve (11) is detachably mounted on the side wall of the grinding roller (4); A scraper (14) is installed on the outside of the rotating shaft (12), and the scraper (14) is adapted to the material storage channel O.

5. The stone and coal cleaning device in the ventilation chamber according to claim 4, characterized in that: The partition (132) abuts against the pressure plate (22). The pressure plate (22) is rotated and deformed along the bend, and the pressure plate (22) is squeezed by the partition (132) and can come into contact with the contact (21).

6. The stone and coal cleaning device in the ventilation chamber according to claim 4, characterized in that: The end of the limiting rod (133) can abut against the outer wall of the rotating shaft (12), and the rotating shaft (12) is movably connected to the mounting sleeve (11); The partition (132) is offset from the pressure plate (22).

7. The air chamber stone and coal cleaning device according to claim 6, characterized in that: The main body of the air chamber (3) includes a discharge pipe (31) located at its bottom; The scraper (14) rotates synchronously with the grinding roller (4), thereby conveying the stones and coal to the discharge pipe (31).

8. The air chamber stone and coal cleaning device according to claim 7, characterized in that: The scraper (14) is able to have its bottom wall flush with the bottom surface of the air chamber body (3) under the action of gravity.

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