CN210504516U - Clear stifled device of former coal bunker coal breakage pipe and airtight structure thereof - Google Patents
Clear stifled device of former coal bunker coal breakage pipe and airtight structure thereof Download PDFInfo
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- CN210504516U CN210504516U CN201921149801.9U CN201921149801U CN210504516U CN 210504516 U CN210504516 U CN 210504516U CN 201921149801 U CN201921149801 U CN 201921149801U CN 210504516 U CN210504516 U CN 210504516U
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Abstract
The utility model discloses a raw coal bunker coal breakage pipe blockage removing device and an air sealing structure thereof, wherein the blockage removing device comprises a speed reducer, a gear, a rotary supporting gear and a scraper which are connected in sequence, the scraper is arranged in a pipeline, and the rotary supporting gear is connected with an inner bunker wall, the scraper and a scraper seat body into a whole through bolts; the air sealing structure comprises an upper sealing cavity, a lower sealing cavity, an upper sealing air pipe, a lower sealing air pipe, a tool apron sealing pressing plate, an adjusting cushion block and a scraper seat body, wherein the tool apron sealing pressing plate is arranged at the position of a connector of the scraper and the inner bin wall; the adjusting cushion block is positioned between the scraper seat body and the inner bin wall, the upper sealing cavity and the lower sealing cavity are respectively positioned on the upper side and the lower side of the adjusting cushion block and are respectively communicated with the upper sealing air pipe and the lower sealing air pipe, and the upper sealing cavity is communicated with the lower sealing cavity. The utility model discloses ensured the stability of peat blending burning powder process system operation, adopted airtight structure in addition, improved sealed effect, fundamentally has eliminated the problem that exposes of wind-powder mixture.
Description
Technical Field
The utility model relates to a thermal power technical field, more specifically say, relate to a clear stifled device of former coal bunker coal breakage pipeline of malleation powder process system and air seal structure thereof.
Background
The design coal for boiler combustion is generally bituminous coal, a medium-speed mill cold primary air positive pressure direct-blowing pulverizing system is adopted, a raw coal bunker is the bottleneck of boiler fuel and is also key equipment of a boiler coal feeding system, and in order to prevent the hopper of the raw coal bunker from being blocked and influence the normal combustion of the boiler, a rotary automatic blockage clearing machine is arranged in the middle section from the inlet of a coal feeder to the raw coal bunker at present to prevent the hopper from being blocked. However, considering the economic situation, peat needs to be mixed and burned, the situation that the peat is blocked from the discharge port of the hopper of the raw coal bunker to the inlet of the coal feeder can occur due to the mixed and burned peat, the stability of the long-term operation of the peat mixed and burned pulverizing system is affected, the inlet device of the coal feeder needs to be modified, and the scraper blocking removal device of the coal dropping pipe is added.
Meanwhile, the use environment is a positive pressure direct blowing powder preparation system, the coal feeder and the raw coal bin part have certain positive pressure, and air-powder mixture can be blown out when the bin wall has a seam, so the sealing problem of the structure needs to be considered when a scraper blockage removing device is used. The existing multiple sealing modes have different disadvantages, firstly, the packing is sealed, the packing is compressed on the premise of sealing, and the gap is reduced, so that the sealing effect is achieved, the mode is just opposite to the requirement of a dynamic and static joint surface of a pipeline, the torque is large when the tightening force is large, the current is high, the gap is increased after the packing operates for a period of time, the subsequent compression is required, the sealing effect is poor, and the operation mode is not ideal; secondly, the labyrinth seal is similar to a labyrinth seal, the labyrinth seal can realize the rotation of a dynamic and static joint surface and simultaneously realize a little sealing effect, but for the use environment of the scraper blockage removing device, the processing precision and the installation precision of the seal structure are required to be quite high, the installation and processing cost is low, meanwhile, the positive pressure system of the labyrinth seal for mixing wind and powder also has a fatal defect, because the labyrinth seal has relative operation, a gap exists, the wind and powder mixture can enter the labyrinth seal from the gap, coal dust is deposited and hardened, the labyrinth seal is jammed after long-term operation, the current is increased, the speed reducer vibrates, and the labyrinth seal deformation can be seriously caused; other mechanical sealing methods have the disadvantages of the two sealing methods.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a clear stifled device of former coal bunker coal breakage pipe of malleation powder process system and airtight structure thereof, its aim at: the scraper blockage removing device for the coal dropping pipeline is added to ensure long-term stable operation of boiler combustion, and the scraper blockage removing device can fundamentally eliminate the problem of leakage of air-powder mixture by adopting an air seal mode.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
Clear stifled device of former coal bunker coal breakage pipe and air seal structure thereof, clear stifled device is installed on the coal breakage pipeline between rotatory clear stifled quick-witted commentaries on classics storehouse of removing and the coal feeder, its characterized in that: the blockage removing device comprises a speed reducer, a gear, a rotary supporting gear and a scraper which are sequentially connected, the scraper is arranged in the pipeline and is away from the inner wall of the pipeline by a certain distance, the rotary supporting gear, the inner bin wall, the scraper and a scraper seat body are connected into a whole through bolts, and the speed reducer drives the scraper to rotate; the air sealing structure comprises an upper sealing cavity, a lower sealing cavity, an upper sealing air pipe, a lower sealing air pipe, a tool apron sealing pressing plate, an adjusting cushion block and a scraper seat body, wherein the tool apron sealing pressing plate is arranged at the position of a connector of the scraper and the inner bin wall; the adjusting cushion block is positioned between the scraper seat body and the inner bin wall, the upper sealing cavity and the lower sealing cavity are respectively positioned on the upper side and the lower side of the adjusting cushion block and are respectively communicated with the upper sealing air pipe and the lower sealing air pipe, and the upper sealing cavity is communicated with the lower sealing cavity.
Preferably, the scraper is 5-8mm from the inner wall of the pipe.
Preferably, the adjusting pads are uniformly distributed on the inner bin wall.
Furthermore, the upper sealing air pipe and the lower sealing air pipe are connected with the upper sealing cavity and the lower sealing cavity in a welding mode.
Furthermore, the upper sealing disc root is positioned on the dynamic and static joint surface of the scraper seat body and the upper coal dropping pipe, and plays a role in sealing; the lower seal packing is positioned on the outer side of the lower labyrinth seal and is fixed by using a lower pressing plate, so that the sealing effect is achieved.
Compared with the prior art, the utility model has the advantages of:
the utility model adds the coal dropping pipe blockage clearing device to timely treat the coal deposited on the wall of the coal dropping pipe bin, thereby effectively ensuring the stability of the operation of the peat blending burning pulverizing system and reducing the safety risk; additionally, the utility model discloses sealed adoption is airtight to the installation of clear stifled device of coal breakage pipe, improves sealed effect, and fundamentally has eliminated the problem that exposes of wind-powder mixture.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a schematic view of the position structure of the present invention.
Fig. 3 is a schematic view of the air-tight principle of the present invention.
Fig. 4 is the schematic view of the installation angle of the adjusting cushion block of the present invention.
In the figure: 1. the device comprises a speed reducer, 2, a gear, 3, a lower sealing packing, 4, a lower pressing plate, 5, a lower sealing air pipe, 6, a compression screw, 7, an adjusting cushion block, 8, an upper sealing packing, 9, a rotary supporting gear, 10, a bearing sealing strip, 11, an upper sealing air pipe, 12, an inner bin wall, 13, a scraper, 14, a cutter seat sealing pressing plate, 15, a housing, 16, a scraper seat body, 17, an electric plugboard door, 18, a coal dropping pipe blockage removing device, 19, a coal feeder, 20 and a rotary blockage removing machine rotary bin.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.
Example 1:
referring to fig. 2, the coal dropping pipe blockage removing device 18 is installed on the coal dropping pipe between the rotary blockage removing machine rotary bin 20 (the rotary blockage removing machine rotary bin is a conventional device) and the coal feeder 19, and is located above the electric spile door 17 of the original coal dropping machine.
Referring to fig. 1, the coal chute blockage removing device comprises a speed reducer 1, a gear 2, a rotary supporting gear 9 and a scraper 13 which are connected in sequence, wherein the scraper 13 is arranged in a pipeline and is 5-8mm away from the inner wall of the pipeline, the rotary supporting gear 9, an inner bin wall 12, the scraper 13 and a scraper seat body 16 are connected into a whole through a compression screw 6, and the speed reducer 1 drives the scraper to rotate to work. And a housing 15 is arranged on the outer side of the coal dropping pipe blockage cleaning device.
Referring to fig. 1, the air-tight sealing structure includes an upper sealing cavity, a lower sealing cavity, an upper sealing air duct 11, a lower sealing air duct 5, a tool apron sealing pressure plate 14, an adjusting cushion block 7, an upper sealing packing 8, and a lower sealing packing 3.
The cutter seat sealing pressing plate 14 is arranged at the interface position of the scraper 13 and the inner bin wall 12, and because the scraper is inserted into the inner bin wall and is connected with the rotary support, a gap exists between the scraper and the inner bin wall, and the hidden troubles of air leakage and powder leakage exist, the cutter seat sealing pressing plate is additionally arranged to play a sealing role.
The upper sealing packing 8 is positioned on the dynamic and static joint surface of the scraper seat body and the upper coal dropping pipe, and plays a role in sealing; a labyrinth seal is designed at the lower opening of the rotary supporting gear, and a lower seal packing 3 is positioned at the outer side of the lower labyrinth seal and is fixed by a lower pressing plate 4 to play a role in sealing.
The bearing sealing strips 10 are arranged between the inner ring and the outer ring of the rotary supporting gear 9, and the outer ring and the inner ring of the rotary supporting gear are sealed by using the sealing strips, so that the balls and the roller paths in the rotary supporting gear are prevented from being damaged due to the fact that sundries enter the rotary supporting gear; and also functions to rotatably support the grease seal.
The adjusting cushion blocks 7 are positioned between the scraper seat body 16 and the inner bin wall 12 and are uniformly distributed on the inner bin wall; the upper sealing cavity and the lower sealing cavity are respectively positioned on the upper side and the lower side of the adjusting cushion block 7 and are respectively communicated with the upper sealing air pipe 11 and the lower sealing air pipe 5, the upper sealing cavity is communicated with the lower sealing cavity, and the air source pressure introduced into the sealing cavities is greater than the air source pressure of the coal feeder, so that the hidden danger of air leakage and powder leakage in the pipeline is prevented, and the sealing effect is achieved.
The specific working principle is as follows:
the working principle of the blockage removing machine is as follows: the motor drives the gear to rotate through an external speed reducer, the rotary supporting gear 9, the adjusting cushion block 7, the inner bin wall 12 and the scraper 13 are connected into a whole through bolts and the compression screws 6, so that the scraper 13 rotates to scrape coal attached to the inner wall of the bin from the bin, a loosening effect is generated in the rotary process, the bonding force between materials is reduced, the coal is easier to fall, and the blockage removing effect of the coal chute is achieved.
Dynamic and static joint surface sealing principle: the scraper blockage removing device is characterized in that an air source of an upper sealing air pipeline and a lower sealing air pipeline of the scraper blockage removing device comes from an outlet pipeline of a sealing fan, a sealing air source of the coal feeder comes from an outlet pipeline of the primary fan, the outlet pressure of the sealing air fan is greater than the outlet pressure of the primary fan, slight deflection angles exist when the sealing air pipeline is welded with the upper sealing cavity and the lower sealing cavity, adjusting cushion blocks are uniformly distributed at the inner bin wall, the upper sealing cavity and the lower sealing cavity are in a communicated state, after the air source is communicated, the upper sealing cavity and the lower sealing cavity form an integral sealing cavity, sealing air respectively enters from an upper sealing air pipe and a lower sealing air pipe and exits from the gap of the upper sealing cavity and the lower sealing cavity to a raw coal bin of the coal feeder, raw coal bin air-powder mixture.
Through the transformation to the clear stifled device of scraper, the operation of powder process system is stable, and clear stifled device does not appear the circumstances such as jam, speed reducer vibration, and motor current is stabilized about 2.02A.
The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (5)
1. Clear stifled device of former coal bunker coal breakage pipe and air seal structure thereof, clear stifled device is installed on the coal breakage pipeline between rotatory clear stifled quick-witted commentaries on classics storehouse of removing and the coal feeder, its characterized in that: the blockage removing device comprises a speed reducer, a gear, a rotary supporting gear and a scraper which are sequentially connected, the scraper is arranged in the pipeline and is away from the inner wall of the pipeline by a certain distance, the rotary supporting gear, the inner bin wall, the scraper and a scraper seat body are connected into a whole through bolts, and the speed reducer drives the scraper to rotate; the air sealing structure comprises an upper sealing cavity, a lower sealing cavity, an upper sealing air pipe, a lower sealing air pipe, a tool apron sealing pressing plate, an adjusting cushion block, a scraper seat body, an upper sealing packing and a lower sealing packing, wherein the tool apron sealing pressing plate is arranged at the interface position of the scraper and the inner bin wall; the adjusting cushion block is positioned between the scraper seat body and the inner bin wall, the upper sealing cavity and the lower sealing cavity are respectively positioned on the upper side and the lower side of the adjusting cushion block and are respectively communicated with the upper sealing air pipe and the lower sealing air pipe, and the upper sealing cavity is communicated with the lower sealing cavity.
2. The raw coal bunker coal breakage pipe blockage cleaning device and the air sealing structure thereof as claimed in claim 1 are characterized in that: the scraper is 5-8mm away from the inner wall of the pipeline.
3. The raw coal bunker coal breakage pipe blockage cleaning device and the air sealing structure thereof as claimed in claim 1 are characterized in that: the adjusting cushion blocks are uniformly distributed on the inner bin wall.
4. The raw coal bunker coal breakage pipe blockage cleaning device and the air sealing structure thereof as claimed in claim 1 are characterized in that: the upper sealing air pipe and the lower sealing air pipe are connected with the upper sealing cavity and the lower sealing cavity in a welding mode.
5. The raw coal bunker coal breakage pipe blockage cleaning device and the air sealing structure thereof as claimed in claim 1 are characterized in that: the upper sealing packing is arranged on a dynamic and static joint surface between the scraper seat body and the upper coal dropping pipe, and plays a role in sealing; the lower seal packing is arranged on the outer side of the lower labyrinth seal and is fixed by using a lower pressing plate, so that the sealing effect is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149801.9U CN210504516U (en) | 2019-07-22 | 2019-07-22 | Clear stifled device of former coal bunker coal breakage pipe and airtight structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149801.9U CN210504516U (en) | 2019-07-22 | 2019-07-22 | Clear stifled device of former coal bunker coal breakage pipe and airtight structure thereof |
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| CN210504516U true CN210504516U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921149801.9U Active CN210504516U (en) | 2019-07-22 | 2019-07-22 | Clear stifled device of former coal bunker coal breakage pipe and airtight structure thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436150A (en) * | 2019-07-22 | 2019-11-12 | 国家能源集团宿迁发电有限公司 | Run coal bin coal spout blockage-clearing device and its air-tight structure |
| CN110436150B (en) * | 2019-07-22 | 2024-07-02 | 国家能源集团宿迁发电有限公司 | Raw coal bin coal dropping pipe blockage removing device and air sealing structure thereof |
-
2019
- 2019-07-22 CN CN201921149801.9U patent/CN210504516U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436150A (en) * | 2019-07-22 | 2019-11-12 | 国家能源集团宿迁发电有限公司 | Run coal bin coal spout blockage-clearing device and its air-tight structure |
| CN110436150B (en) * | 2019-07-22 | 2024-07-02 | 国家能源集团宿迁发电有限公司 | Raw coal bin coal dropping pipe blockage removing device and air sealing structure thereof |
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