Pebble coal deslagging and unblocking device of coal mill
By designing a coal grinder slag removal and blocking device for gravel coal, ceramic fiber reinforced rubber skin and blocking mechanism are used to clear the slag discharge opening without shutting down, the problem of blockage of coal grinder is solved and the stability and safety of equipment operation are improved.
Patent Information
- Application Number
- CN202510414747.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, when the coal mill is running, the slag discharge opening of the gravel coal is easily blocked by impurities, resulting in the equipment not being able to operate normally. During cleaning, the machine must be shut down to isolate the air once to prevent high-temperature and high-pressure air leakage, affecting the stability and economy of the unit.
A coal grinder slag removal and blocking device is designed, including a gravel coal truck, top cover, skin, self-tightening mechanism and blocking mechanism. The slag removal port is cleared without stopping, and ceramic fiber reinforced rubber skin is used to prevent high-temperature and high-pressure wind leakage. Combined with self-tightening mechanism and cleaning wipe to achieve real-time observation and cleaning.
It realizes the cleaning and blocking of slag discharge ports without stopping the coal mill, avoids high-temperature and high-pressure wind leakage, improves the operating stability and economy of the equipment, and ensures safety and efficiency.
Smart Images
Figure CN120286164A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pebble coal slag removal and blockage clearing equipment, and in particular to a pebble coal slag removal and blockage clearing device for a coal mill. Background Art
[0002] Affected by the structure of the medium-speed roller mill, during the process of grinding coal powder in the mill, some hard impurities in the coal, such as pebble coal, will fall into the pebble coal chamber through the gap of the mill ring, and then be swept to the pebble coal slag outlet by the pebble coal scraper rotating with the mill disc, and then flow into the lower pebble coal slag trolley through the pebble coal slag plug plate by its own gravity, and the pebble coal in the pebble coal trolley is regularly emptied by a forklift. When the mill is operating normally, the pebble coal trolley is sealed and connected to the mill body, and the pebble coal plug plate is in an open state, which is convenient for the continuous discharge of pebble coal. In this case, the wind pressure in the pebble coal trolley is consistent with the primary air of the system, both of which are high-temperature and high-pressure hot air. When the pebble coal trolley needs to be emptied, the pebble coal plug plate is closed, the primary air is isolated, the trolley is separated from the system, and it is transported to the designated location by a forklift. However, since coal contains a large amount of impurities such as iron wire and iron blocks, the stone coal slag outlet will be blocked, preventing the stone coal from being discharged normally, causing a large amount of stone coal to accumulate in the stone coal chamber and block the primary air duct, causing the coal mill to be unable to operate. Excessive stone coal will also cause equipment damage and economic losses. In the prior art, when cleaning the slag outlet, in order to prevent the leakage of high-temperature and high-pressure primary air from causing harm to people and equipment, it is necessary to stop the coal mill and close the primary air shut-off door. Cleaning can only be carried out after the primary air is isolated. Stopping the coal mill will have a significant impact on the stability and economy of the unit.
[0003] Therefore, how to clean the clogged slag outlet without stopping the coal mill becomes a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention
[0004] The invention provides a coal mill stone coal slag discharge and blockage clearing device, which is used to solve the problem of how to clean the blocked slag discharge port without stopping the coal mill.
[0005] The present invention provides a coal mill stone coal slag removal and blockage removal device, comprising: Pebble coal trolley, A top cover, detachably connected to the top of the stone coal trolley; The skin is provided on one side of the pebble coal car and the skin is wrapped around the pebble coal car around the opening; A self-tightening mechanism, mounted on the skin; One end of the blockage clearing mechanism passes through the self-tightening mechanism and extends to the top of the stone coal trolley, facing the slag discharge port of the coal mill.
[0006] In some of these embodiments, the skin is composed of five layers of ceramic fiber-reinforced rubber.
[0007] In some of these embodiments, the self-tightening mechanism includes: A fixing ring, installed on the skin; A rubber ring, installed on the inner ring of the fixing ring and made of nitrile rubber.
[0008] In some of these embodiments, the self-tightening mechanism further includes: Springs, multiple in number, and one end of each spring is connected to the side of the fixing ring inside the skin; A baffle, connected to the other end of the spring.
[0009] In some of these embodiments, the baffle is semicircular in shape, and the spring is connected to the arc portion of the baffle.
[0010] In some of these embodiments, the blockage clearing mechanism includes: An outer tube, hollow inside; An inner tube, installed in the outer tube; A sleeve, slidably sleeved outside the inner tube, and a rectangular through-hole A is opened on the outer tube; A bushing, fixedly sleeved on the inner tube; An arc-shaped claw, one end of which is rotatably connected to the bushing, and the arc-shaped claw rotates outwards through the rectangular through-hole A; A connecting rod, one end of which is rotatably connected to the top of the sleeve, and the other end is rotatably connected to the arc-shaped claw; A rectangular through-hole B is also opened on the outer tube, and the sleeve slides through the rectangular through-hole B.
[0011] In some of these embodiments, barbs are installed on the inner arc portion of the arc-shaped claw.
[0012] In some of these embodiments, a handle is installed on the sleeve at the rectangular through-hole B, and anti-slip threads are provided on the handle.
[0013] In some of these embodiments, it further includes: an observation mechanism, and the observation mechanism includes: An observation window, installed on the pebble coal trolley; A knob, one end of which passes through the observation window and extends into the interior of the pebble coal trolley; A cleaning wipe, connected to the end of the knob located inside the pebble coal trolley.
[0014] In some of these embodiments, it further includes: moving wheels, installed at the bottom of the pebble coal trolley, and a forklift opening is also provided on the pebble coal trolley.
[0015] The beneficial effects of the present invention are as follows: When the device of the present invention is in use, the top of the pebble coal trolley is hermetically connected to the coal mill to collect the processed pebble coal. If it is found that the primary air pressure and air volume of the coal mill show a decreasing trend, it indicates that the slag discharge port is blocked. At this time, the blockage clearing mechanism in the present invention is used for cleaning. The user holds the outer tube, passes the outer tube through the rubber ring and the baffle, and deep into the interior of the pebble coal trolley. Then, the user presses down the handheld part to lift the end of the outer tube, inserts it into the interior of the coal mill through the slag discharge port, and then slides the handle forward, thereby driving the sleeve to slide forward, the connecting rod to open outward, and further driving the arc-shaped claw to open. Then, the user only needs to pull the outer tube forcefully to complete the cleaning of the slag discharge port. After the cleaning is completed, slide the handle backward to retract the arc-shaped claw, take it out from the pebble coal trolley, and the baffle closes under the action of the spring elasticity to prevent the high-temperature primary air from leaking and causing burns. At the same time, an observation mechanism is also provided in the present invention, enabling the user to observe the coal storage amount in the pebble coal trolley in real time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural view of a coal mill pebble coal slag discharge and blockage clearing device of the present invention from one perspective; Figure 2 is Figure 1 a schematic structural view of the self-tightening mechanism in a coal mill pebble coal slag discharge and blockage clearing device shown; Figure 3 is Figure 1 a schematic structural view of the baffle in a coal mill pebble coal slag discharge and blockage clearing device shown; Figure 4 is Figure 1 a schematic structural view of the blockage clearing mechanism in a coal mill pebble coal slag discharge and blockage clearing device shown; Figure 5 is Figure 4 a partially enlarged view of the blockage clearing mechanism in a coal mill pebble coal slag discharge and blockage clearing device shown.
[0017] Figure 6 is Figure 1 a schematic structural view of the observation mechanism in a coal mill pebble coal slag discharge and blockage clearing device shown; In the drawings, 1, pebble coal trolley; 2, top cover; 3, skin; 4, self-tightening mechanism; 41, fixed ring; 42, rubber ring; 43, spring; 44, baffle; 5, blockage clearing mechanism; 51, outer tube; 52, inner tube; 53, sleeve; 54, rectangular through hole A; 55, bushing; 56, arc-shaped claw; 561, barbs; 57, connecting rod; 58, rectangular through hole B; 59, handle; 6, observation mechanism; 61, observation window; 62, knob; 63, cleaning wipe; 7, moving wheel; 8, forklift opening. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0019] As described in the background art, in the prior art, when cleaning the slag discharge port, in order to prevent the leakage of high-temperature and high-pressure primary air from causing harm to the person and equipment, it is necessary to stop the operation of the coal mill, close the primary air shut-off valve, and only then can the cleaning be carried out after isolating the primary air. Stopping the coal mill will have a greater impact on the stability and economy of the unit. Therefore, how to clean the blocked slag discharge port without stopping the coal mill has become a technical problem that needs to be solved urgently by those skilled in the art.
[0020] To solve the above problems, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , the present invention provides a device for clearing and unclogging the slag discharge of the coal mill's pebble coal, which includes a pebble coal trolley 1, a top cover 2, a skin 3, a self-tightening mechanism 4 and a clogging clearing mechanism 5. The top cover 2 is detachably connected to the top of the pebble coal trolley 1. An opening is provided on one side of the pebble coal trolley 1 for the skin 3, and the skin 3 is wrapped around the pebble coal trolley 1 around the opening. The self-tightening mechanism 4 is installed on the skin 3, and one end of the clogging clearing mechanism 5 passes through the self-tightening mechanism 4 and extends to the top of the pebble coal trolley 1, facing the slag discharge port of the coal mill.
[0021] Specifically, in the technical solution of the present invention, by using the clogging clearing mechanism 5 to pass through the self-tightening mechanism 4, the end of the clogging clearing mechanism 5 passes through the slag discharge port of the coal mill and is inserted into the interior of the coal mill, thereby dredging the slag discharge port, and the coal mill does not need to stop during the dredging process.
[0022] Preferably, the skin 3 is composed of five layers of ceramic fiber-reinforced rubber.
[0023] Specifically, the primary air in the coal mill has the characteristics of high temperature and high pressure, and the temperature can reach 400 °C. Therefore, the skin 3 of the present invention is made of ceramic fiber-reinforced rubber, and the heat-resistant temperature of the ceramic fiber-reinforced rubber can reach above 400 °C, and it has a certain rigidity and flexibility.
[0024] Preferably, the self-tightening mechanism 4 includes: a fixing ring 41 and a rubber ring 42. The fixing ring 41 is installed on the skin 3, and the rubber ring 42 is installed on the inner ring of the fixing ring 41, and the material is nitrile rubber.
[0025] Preferably, the self-tightening mechanism 4 further includes: a spring 43 and a baffle 44. A plurality of springs 43 are provided, and one end of each spring 43 is connected to one side of the fixed ring 41 located inside the skin 3, and the baffle 44 is connected to the other end of the spring 43.
[0026] Specifically, the inner radius of the rubber ring 42 is smaller than the radius of the baffle 44, while the radius of the outer tube 51 is slightly larger than the inner radius of the rubber ring 42 and smaller than the radius of the baffle 44. After the outer tube 51 passes through the baffle 44, the rubber ring 42 can tightly wrap around the outer tube 51. And because the rubber ring 42 itself is flexible, the end of the outer tube 51 can be lifted to the slag discharge port of the coal mill.
[0027] Preferably, the baffle 44 is in a semi-circular shape, and the spring 43 is connected to the arc portion of the baffle 44.
[0028] Preferably, the blockage clearing mechanism 5 includes: an outer tube 51, an inner tube 52, a sleeve 53, a bushing 55, an arc-shaped claw 56 and a connecting rod 57. The inside of the outer tube 51 is hollow, the inner tube 52 is installed in the outer tube 51, the sleeve 53 is slidably sleeved outside the inner tube 52, and a rectangular through hole A54 is provided on the outer tube 51. The bushing 55 is fixedly sleeved on the inner tube 52. One end of the arc-shaped claw 56 is rotatably connected to the bushing 55, and the arc-shaped claw 56 rotates outwards through the rectangular through hole A54. One end of the connecting rod 57 is rotatably connected to the top of the sleeve 53, and the other end is rotatably connected to the arc-shaped claw 56. A rectangular through hole B58 is also provided on the outer tube 51, and the sleeve 53 slides through the rectangular through hole B58.
[0029] Specifically, preferably three groups of rectangular through holes A54 are provided along the circumferential direction of the outer tube 51, that is, three groups of arc-shaped claws 56 are also provided, and the horizontal included angle between two adjacent groups of arc-shaped claws 56 is 120 degrees. At the same time, the arc-shaped claws 56 can be completely retracted into the inside of the outer tube 51 to prevent scratching the rubber ring 42 when it is inserted or withdrawn.
[0030] Preferably, barbs 561 are installed on the inner arc portion of the arc-shaped claw 56.
[0031] Specifically, the arrangement of the barbs 561 can make the blockage clearing mechanism 5 in the present invention easier to "grab" the blockage. At the same time, the tip of the barbs 561 provided in the present invention is in the opposite direction to the tip of the arc-shaped claw 56.
[0032] Preferably, a handle 59 is installed on the sleeve 53 at the rectangular through hole B58, and anti-slip threads are provided on the handle 59).
[0033] Specifically, preferably four groups of rectangular through holes B58 are provided and are evenly distributed along the circumferential direction of the outer tube 51, that is, four groups of handles 59 are also provided.
[0034] Preferably, it further includes an observation mechanism 6, and the observation mechanism 6 includes an observation window 61, a knob 62, and a cleaning wiper 63. The observation window 61 is installed on the pebble coal trolley 1. One end of the knob 62 passes through the observation window 61 and extends into the interior of the pebble coal trolley 1. The cleaning wiper 63 is connected to the end of the knob 62 located inside the pebble coal trolley 1.
[0035] Specifically, multiple groups of the observation windows 61 are provided in the present invention. The multiple groups of observation windows 61 can be horizontally arranged on the upper part of the pebble coal trolley 1 to expand the field of view in the horizontal direction, or can be longitudinally arranged to expand the field of view in the vertical direction. In the case where the observation window 61 becomes blurred after long-term use, the user can drive the cleaning wiper 63 to rotate by turning the knob 62 to clean the observation window 61.
[0036] Preferably, it further includes moving wheels 7, which are installed at the bottom of the pebble coal trolley 1, and a forklift opening 8 is also provided on the pebble coal trolley 1.
[0037] Specifically, in order to prevent the drawback that the special forklift for pebble coal cleaning fails and the pebble coal cannot be cleaned in time, while retaining the original distance between the forklift forks and the socket, another socket is opened according to the distance between the forks of the manual hydraulic forklift in the present invention, enabling the blockage clearing device of the present invention to be mechanically cleaned by a special forklift and manually cleaned by a hydraulic forklift when the special forklift fails, greatly improving the reliability of the equipment.
[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0040] In the present invention, unless otherwise clearly specified or limited, terms such as "install", "connect", "couple", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.
Claims
1. A slag discharging and blockage clearing device for pulverized coal mill stones, characterized in that, Including: The pebble coal trolley (1), The top cover (2), detachably connected to the top of the pebble coal trolley (1); The skin (3), an opening is provided on one side of the pebble coal trolley (1), and the skin (3) is wrapped around the pebble coal trolley (1) around the opening; The self-tightening mechanism (4), installed on the skin (3); The blockage clearing mechanism (5), one end passes through the self-tightening mechanism (4) and extends into the top of the pebble coal trolley (1), facing the slag discharge port of the coal mill.
2. The coal mill pebble coal slag discharging and blockage clearing device according to claim 1, characterized in that, The skin (3) is composed of five layers of ceramic fiber reinforced rubber.
3. The coal mill slag discharge and blockage clearing device according to claim 1, characterized in that, The self-tightening mechanism (4) includes: The fixed ring (41), installed on the skin (3); The rubber ring (42), installed on the inner ring of the fixed ring (41), and the material is nitrile rubber.
4. The coal mill slag discharge and blockage clearing device for pebble coal according to claim 3, wherein The self-tightening mechanism (4) further includes: The springs (43), there are multiple, and one end is connected to the side of the fixed ring (41) inside the skin (3); The baffle (44), connected to the other end of the spring (43).
5. The coal mill pebble coal slag discharging and plugging clearing device according to claim 4, characterized in that, The shape of the baffle (44) is semi-circular, and the spring (43) is connected to the arc portion of the baffle (44).
6. The coal mill pebble coal slag discharging and plugging clearing device according to claim 1, characterized in that, The blockage clearing mechanism (5) includes: The outer tube (51), with a hollow interior; The inner tube (52), installed in the outer tube (51); The sleeve (53), slidably sleeved on the outside of the inner tube (52), and a rectangular through hole A (54) is provided on the outer tube (51); The bushing (55), fixedly sleeved on the inner tube (52); The arc claw (56), one end is rotatably connected to the bushing (55), and the arc claw (56) rotates outwards through the rectangular through hole A (54); The connecting rod (57), one end is rotatably connected to the top of the sleeve (53), and the other end is rotatably connected to the arc claw (56); A rectangular through hole B (58) is also provided on the outer tube (51), and the sleeve (53) slides through the rectangular through hole B (58).
7. The coal mill pebble coal slag discharging and plugging clearing device according to claim 6, characterized in that, Barbs (561) are installed on the inner arc portion of the arc claw (56).
8. The coal mill pebble coal slag discharging and blockage clearing device according to claim 6, wherein A handle (59) is installed on the sleeve (53) at the rectangular through hole B (58), and anti-slip threads are provided on the handle (59).
9. The coal stone slag discharging and plug clearing device for coal mill according to claim 1, characterized in that, It also includes: The observation mechanism (6), the observation mechanism (6) includes: The observation window (61), installed on the pebble coal trolley (1); The knob (62), one end passes through the observation window (61) and extends into the interior of the pebble coal trolley (1); The cleaning wipe (63), connected to the end of the knob (62) inside the pebble coal trolley (1).
10. The coal mill pebble coal slag discharging and clogging clearing device according to claim 1, wherein, It also includes: The moving wheels (7), installed at the bottom of the pebble coal trolley (1), and a forklift opening (8) is also provided on the pebble coal trolley (1).