阅读说明：本技术 抑尘结构及输煤、碎煤系统 (Dust suppression structure and coal conveying and crushing system ) 是由 毕婷婷 王汝青 赵勇 李宇 文明波 石峥嵘 刘皞 付衡业 刘晓朋 于 2021-08-23 设计创作，主要内容包括：本发明涉及输煤系统技术领域,具体涉及一种抑尘结构及输煤、碎煤系统,抑尘结构适于安装在落煤管中,落煤管包括相对的两个第一侧壁,第一侧壁上开设有安装通孔,抑尘结构包括：第一固定结构适于固定在其中一个第一侧壁上,第一固定结构上设有适于与落煤管内部相通的第一铰接孔；第二固定结构适于固定在其中另一个第一侧壁上,第二固定结构上设有适于与落煤管内部相通的第二铰接孔；挡板通过铰接轴连接在第一铰接孔和第二铰接孔中,挡板及铰接轴适于通过安装通孔安装到落煤管中；驱动组件适于固定在落煤管外,驱动组件与铰接轴相连,用于驱动挡板转动,以使挡板具有与落煤管的轴向相垂直的阻挡位置以及与落煤管的轴向相平行的打开位置。(The invention relates to the technical field of coal conveying systems, in particular to a dust suppression structure and a coal conveying and breaking system, wherein the dust suppression structure is suitable for being installed in a coal dropping pipe, the coal dropping pipe comprises two opposite first side walls, installation through holes are formed in the first side walls, and the dust suppression structure comprises: the first fixing structure is suitable for being fixed on one of the first side walls, and a first hinge hole suitable for being communicated with the interior of the coal dropping pipe is formed in the first fixing structure; the second fixing structure is suitable for being fixed on the other first side wall, and a second hinge hole suitable for being communicated with the interior of the coal dropping pipe is formed in the second fixing structure; the baffle is connected in the first hinge hole and the second hinge hole through hinge shafts, and the baffle and the hinge shafts are suitable for being installed in the coal dropping pipe through installation through holes; the driving component is suitable for being fixed outside the coal dropping pipe and is connected with the hinged shaft for driving the baffle to rotate, so that the baffle has a blocking position perpendicular to the axial direction of the coal dropping pipe and an opening position parallel to the axial direction of the coal dropping pipe.)

1. A dust suppressing structure adapted to be installed in a coal drop pipe (16), the coal drop pipe (16) comprising two first opposite side walls (1601), the first side walls (1601) having installation through holes opened therein, the dust suppressing structure comprising:

the first fixing structure is suitable for being fixed on one of the first side walls (1601) and provided with a first hinge hole (303) suitable for being communicated with the interior of the coal dropping pipe (16);

the second fixing structure is suitable for being fixed on the other first side wall (1601) and is provided with a second hinge hole (304) suitable for being communicated with the interior of the coal dropping pipe (16);

a baffle plate (1) connected in the first hinge hole (303) and the second hinge hole (304) by a hinge shaft (2), the baffle plate (1) and the hinge shaft (2) being adapted to be installed into the coal dropping pipe (16) through the installation through-hole;

the driving assembly is suitable for being fixed outside the coal dropping pipe (16), is connected with the hinged shaft (2) and is used for driving the baffle (1) to rotate so that the baffle (1) has a blocking position perpendicular to the axial direction of the coal dropping pipe (16) and an opening position parallel to the axial direction of the coal dropping pipe (16).

2. A dust suppressing structure as recited in claim 1, wherein said first fixing structure and/or said second fixing structure includes:

the fixing frame (3) comprises a first plate-shaped part (301), the first plate-shaped part (301) is suitable for abutting against the outside of the first side wall (1601), and the first plate-shaped part (301) is provided with a rectangular hole (302) and the first hinge hole (303) or the second hinge hole (304);

the upper fixing groove (4) is of a U-shaped structure and comprises a first bottom plate (401), a first side plate (402) and a second side plate (403) which are arranged on two sides of the first bottom plate (401), the upper fixing groove (4) is suitable for penetrating through the rectangular hole (302) so that the first side plate (402) abuts against the inner side of the first side wall (1601), the second side plate (403) abuts against the outer side of the first plate-shaped part (301), and the first bottom plate (401) abuts against the upper hole wall of the rectangular hole (302);

the lower fixing groove (5) is of a U-shaped structure and comprises a second bottom plate (501), and a third side plate (502) and a fourth side plate (503) which are arranged on two sides of the second bottom plate (501), the lower fixing groove (5) is suitable for penetrating through the rectangular hole (302) so that the third side plate (502) abuts against the inner side of the first side wall (1601), the fourth side plate (503) abuts against the outer side of the first plate-shaped part (301), and the first bottom plate (401) abuts against the lower hole wall of the rectangular hole (302);

and a seal assembly hermetically connected to the outside of the first plate-shaped portion (301), and connected to the first side plate (402), the second side plate (403), the third side plate (502), and the fourth side plate (503) by screws.

3. A dust suppressing structure as defined in claim 2, wherein said fixing frame (3) further comprises a second plate-like portion (305), said second plate-like portion (305) being provided at both ends of said first plate-like portion (301), said second plate-like portion (305) being adapted to abut against the outside of a second side wall adjacent to said first side wall (1601).

4. A dust suppressing structure as defined in claim 2, wherein said first plate-like portion (301) is provided with a mounting groove, and said seal assembly includes:

the first sealing gasket (6) is arranged in the mounting groove;

and the sealing plate (7) is positioned outside the second side plate (403) and the fourth side plate (503) and is connected with the first side plate (402), the second side plate (403), the third side plate (502) and the fourth side plate (503) through screws.

5. A dust suppressing structure as defined in claim 4, characterized in that said baffle (1) is surrounded by a second sealing gasket (8), said second sealing gasket (8) being sealingly connected to the inner wall of said coal dropping pipe (16) when said baffle (1) is in said blocking position.

6. A dust suppressing structure as defined in claim 5, characterized in that said baffle (1) is made of three-proof needle felt;

and/or, the dust suppression structure further comprises a bearing seat (9) and a bearing arranged in the bearing seat (9), the bearing seat (9) is installed on the first plate-shaped part (301), and the hinge shaft (2) is arranged in the bearing;

and/or, the drive assembly comprises:

the driving motor (10) is suitable for being fixed outside the coal dropping pipe (16);

the driving gear (11) is connected to the outside of an output shaft of the driving motor (10);

and the driven gear (12) is fixed outside the hinged shaft (2) and is meshed and connected with the driving gear (11).

7. A dust suppressing structure as defined in any one of claims 2-6 further comprising a stopper rod (13), both ends of said stopper rod (13) being provided in said first plate-like portion (301), said stopper rod (13) being located above said baffle (1).

8. A coal conveying, crushing system comprising a coal crusher and a dust suppressing structure as claimed in any one of claims 1 to 7 mounted in a coal drop tube (16) above the coal crusher.

9. The coal conveying and pulverizing system of claim 8, further comprising a time delay controller communicatively connected to the driving assembly and the coal pulverizer for controlling the driving assembly to operate after a preset time for starting the coal pulverizer to rotate the shutter (1) from the blocking position to the open position, and controlling the driving assembly to operate after a preset time for stopping the coal pulverizer to rotate the shutter (1) from the open position to the blocking position.

10. The coal conveying and crushing system according to claim 9, wherein a position sensor is disposed on an inner wall of the coal dropping pipe (16) or the baffle (1), and the delay controller is connected to the driving assembly for controlling the driving assembly to stop when the position sensor detects that the baffle (1) rotates from the blocking position to the open position or rotates from the open position to the blocking position.

Technical Field

The invention relates to the technical field of coal conveying systems, in particular to a dust suppression structure and a coal conveying and breaking system.

Background

In the power plant which is built at present, due to the defects and technical limitations of the prior design, a blanking pipe of a coal conveying system can generate reverse dust due to wind resistance in the processes of starting a coal conveying belt, starting a dust remover and conveying coal, and the dust can return to an upper coal conveying hopper through the blanking pipe. Especially, when the coal breaker is started, due to internal positive pressure, dust of the coal breaker body and the chute is totally returned out through the coal dropping pipe and the funnel, and smoke in the whole coal breaking chamber is detoured. Most of the traditional schemes are additionally provided with dust collectors, so that the manufacturing cost is high, and the production discharge is delayed.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that dust returns upwards through a coal dropping pipe when a coal breaker in the prior art is started, so that a dust suppression structure and a coal conveying and breaking system capable of preventing dust from returning upwards through the coal dropping pipe are provided.

In order to solve the above technical problem, the present invention provides a dust suppressing structure adapted to be installed in a coal dropping pipe, the coal dropping pipe includes two first side walls opposite to each other, the first side walls are provided with installation through holes, and the dust suppressing structure includes: the first fixing structure is suitable for being fixed on one of the first side walls, and a first hinge hole suitable for being communicated with the interior of the coal dropping pipe is formed in the first fixing structure; the second fixing structure is suitable for being fixed on the other first side wall, and a second hinge hole suitable for being communicated with the interior of the coal dropping pipe is formed in the second fixing structure; a baffle plate connected in the first hinge hole and the second hinge hole by a hinge shaft, the baffle plate and the hinge shaft being adapted to be installed in the coal dropping pipe through the installation through hole; and the driving assembly is suitable for being fixed outside the coal dropping pipe and is connected with the hinged shaft and used for driving the baffle to rotate so that the baffle has a blocking position vertical to the axial direction of the coal dropping pipe and an opening position parallel to the axial direction of the coal dropping pipe.

Optionally, the first and/or second fixation structure comprises: the fixing frame comprises a first plate-shaped part, the first plate-shaped part is suitable for abutting against the outside of the first side wall, and the first plate-shaped part is provided with a rectangular hole and the first hinge hole or the second hinge hole; the upper fixing groove is of a U-shaped structure and comprises a first bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are arranged on two sides of the first bottom plate, the upper fixing groove is suitable for penetrating through the rectangular hole, so that the first side plate abuts against the inner side of the first side wall, the second side plate abuts against the outside of the first plate-shaped part, and the first bottom plate abuts against the upper hole wall of the rectangular hole; the lower fixing groove is of a U-shaped structure and comprises a second bottom plate, a third side plate and a fourth side plate, the third side plate and the fourth side plate are arranged on two sides of the second bottom plate, the lower fixing groove is suitable for penetrating through the rectangular hole, so that the third side plate is abutted against the inner side of the first side wall, the fourth side plate is abutted against the outer side of the first plate-shaped part, and the first bottom plate is abutted against the lower hole wall of the rectangular hole; and the sealing assembly is hermetically connected outside the first plate-shaped part and is connected with the first side plate, the second side plate, the third side plate and the fourth side plate through screws.

Optionally, the fixing frame further comprises second plate-shaped portions provided at both ends of the first plate-shaped portion, the second plate-shaped portions being adapted to abut against the outside of a second side wall adjacent to the first side wall.

Optionally, a mounting groove is provided on the first plate-shaped portion, and the sealing assembly includes: the first sealing gasket is arranged in the mounting groove; and the sealing plate is positioned outside the second side plate and the fourth side plate and is connected with the first side plate, the second side plate, the third side plate and the fourth side plate through screws.

Optionally, a second sealing gasket is arranged around the outer side of the baffle, and when the baffle is located at the blocking position, the second sealing gasket is in sealing connection with the inner wall of the coal dropping pipe.

Optionally, the baffle is made of a three-proof needled felt;

and/or, the dust suppression structure further comprises a bearing seat and a bearing arranged in the bearing seat, the bearing seat is mounted on the first plate-shaped part, and the articulated shaft is arranged in the bearing;

and/or, the drive assembly comprises: the driving motor is suitable for being fixed outside the coal dropping pipe; the driving gear is connected outside the output shaft of the driving motor; and the driven gear is fixed outside the hinged shaft and is in meshed connection with the driving gear.

Optionally, the dust suppressing structure further comprises a blocking rod, two ends of the blocking rod are arranged in the first plate-shaped part, and the blocking rod is located above the baffle.

The invention also provides a coal conveying and crushing system which comprises the dust suppression structure, wherein the dust suppression structure is arranged in the coal dropping pipe above the coal crusher.

Optionally, the coal pulverizer further comprises a delay controller, wherein the delay controller is in communication connection with the driving assembly and the coal pulverizer and is used for controlling the driving assembly to work after the coal pulverizer starts to work for a preset time, so that the baffle rotates from the blocking position to the opening position, and controlling the driving assembly to work after the coal pulverizer stops to work for a preset time, so that the baffle rotates from the opening position to the blocking position.

Optionally, a position sensor is arranged on the inner wall of the coal dropping pipe or the baffle, and the delay controller is connected with the driving assembly and used for controlling the driving assembly to stop working when the position sensor detects that the baffle rotates from the blocking position to the opening position or rotates from the opening position to the blocking position.

The technical scheme of the invention has the following advantages:

1. when the dust suppression structure is installed in a coal dropping pipe, installation through holes are formed in two first side walls of the coal dropping pipe in advance, the first fixing structure is fixed on one first side wall, then a baffle plate enters the coal dropping pipe through the installation through hole in the other first side wall, a hinge shaft is connected into a first hinge hole, then a second fixing structure is fixed outside the other first side wall, the hinge shaft is connected into a second hinge hole of the second fixing structure, and finally a driving assembly is installed, fixed outside the coal dropping pipe and connected with the hinge shaft. Steerable articulated shaft of drive assembly rotates to drive the baffle and rotate, when the baffle is located and blocks the position, can block that the dust upwards returns out through the coal breakage pipe, when the baffle is located the open position, the coal cinder accessible coal breakage pipe gets into in the coal breaker of below smoothly. And because this dust suppression structure of installation only need set up on the coal breakage pipe installation through-hole can, the installation is simple and convenient, and is with low costs to current coal breakage pipe transformation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of a dust suppressing structure provided in example 1 of the present invention;

FIG. 2 is a schematic structural view of a dust suppressing structure provided in embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a dust suppressing structure provided in embodiment 1 of the present invention installed in a coal chute.

Description of reference numerals:

1. a baffle plate; 2. hinging a shaft; 3. a fixing frame; 301. a first plate-like portion; 302. a rectangular hole; 303. a first hinge hole; 304. a second hinge hole; 305. a second plate-like portion; 4. an upper fixing groove; 401. a first base plate; 402. a first side plate; 403. a second side plate; 5. a lower fixing groove; 501. a second base plate; 502. a third side plate; 503. a fourth side plate; 6. a first gasket; 7. a sealing plate; 8. a second gasket; 9. a bearing seat; 10. a drive motor; 11. a driving gear; 12. a driven gear; 13. a gear lever; 1301. a rod body; 1302. a bump; 14. a gear case; 15. an electrical box; 16. a coal dropping pipe; 1601. a first side wall.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

In the power plant which is built at present, due to the defects and technical limitations of the prior design, a blanking pipe of a coal conveying system can generate reverse dust due to wind resistance in the processes of starting a coal conveying belt, starting a dust remover and conveying coal, and the dust can return to an upper coal conveying hopper through the blanking pipe. Especially, when the coal breaker is started, due to internal positive pressure, dust of the coal breaker body and the chute is totally returned out through the coal dropping pipe and the funnel, and smoke in the whole coal breaking chamber is detoured. Most of the traditional schemes are additionally provided with dust collectors, so that the manufacturing cost is high, and the production discharge is delayed.

For this reason, the present embodiment provides a dust suppressing structure, which is suitable for being installed in the coal dropping pipe 16, the coal dropping pipe 16 includes two opposite first sidewalls 1601, and the two first sidewalls 1601 are both opened with installation through holes, and after the dust suppressing structure is installed in the coal dropping pipe 16, it can prevent the dust from returning upwards through the coal dropping pipe 16.

In one embodiment, as shown in fig. 1 and 2, the dust suppressing structure includes a first fixed structure, a second fixed structure, a baffle 1, and a drive assembly. The first fixing structure is suitable for being fixed on one of the first side walls 1601, and a first hinge hole 303 suitable for being communicated with the interior of the coal dropping pipe 16 is formed in the first fixing structure; the second fixing structure is suitable for being fixed on the other first side wall 1601 and is provided with a second hinge hole 304 suitable for being communicated with the interior of the coal dropping pipe 16; the baffle 1 is connected in the first hinge hole 303 and the second hinge hole 304 through the hinge shaft 2, and the baffle 1 and the hinge shaft 2 are adapted to be installed in the coal dropping pipe 16 through the installation through-hole; and the driving assembly is suitable for being fixed outside the coal dropping pipe 16 and is connected with the hinged shaft 2 for driving the baffle plate 1 to rotate, so that the baffle plate 1 has a blocking position perpendicular to the axial direction of the coal dropping pipe 16 and an opening position parallel to the axial direction of the coal dropping pipe 16.

In this embodiment, when the dust suppressing structure is installed in the coal chute 16, installation through holes are formed in the two first side walls 1601 of the coal chute 16 in advance, the first fixing structure is fixed to one of the first side walls 1601, the baffle 1 is then inserted into the coal chute 16 through the installation through hole in the other first side wall 1601, the hinge shaft 2 is connected to the first hinge hole 303, the second fixing structure is fixed to the other first side wall 1601, the hinge shaft 2 is connected to the second hinge hole 304 of the second fixing structure, and finally, a driving component is installed, the driving component is fixed to the outside of the coal chute 16, and the driving component is connected to the hinge shaft 2. Steerable articulated shaft 2 of drive assembly rotates to drive baffle 1 and rotate, when baffle 1 was located and blocks the position, can block that the dust upwards returns out through coal breakage pipe 16, when baffle 1 was located the open position, the coal cinder accessible coal breakage pipe 16 got into in the coal breaker of below smoothly. And because this dust suppression structure of installation only needs to set up the installation through-hole on coal breakage pipe 16 can, the installation is simple and convenient, and is with low costs to current coal breakage pipe 16 transformation.

As shown in fig. 1, the baffle 1 is a rectangular plate, and correspondingly, the cross section of the coal dropping pipe 16 is rectangular. Of course, in some other alternative embodiments, the shape of the baffle 1 may be other shapes, and correspondingly, the shape of the coal dropping pipe 16 is other shapes.

In addition to the above embodiments, in a preferred embodiment, the first fixing structure and the second fixing structure have the same structure, and each of the first fixing structure and the second fixing structure includes a fixing frame 3, an upper fixing groove 4, a lower fixing groove 5, and a sealing member. The fixed frame 3 comprises a first plate-shaped part 301, the first plate-shaped part 301 is suitable for abutting against the outside of the first side wall 1601, and the first plate-shaped part 301 is provided with a rectangular hole 302 and a first hinge hole 303 or a second hinge hole 304; the upper fixing groove 4 is of a U-shaped structure and comprises a first bottom plate 401, and a first side plate 402 and a second side plate 403 which are arranged on two sides of the first bottom plate 401, the upper fixing groove 4 is suitable for penetrating through the rectangular hole 302, so that the first side plate 402 is positioned in the first side wall 1601, the second side plate 403 is positioned outside the first plate-shaped portion 301, and the first bottom plate 401 abuts against the upper hole wall of the rectangular hole 302; the lower fixing groove 5 is of a U-shaped structure and comprises a second bottom plate 501, and a third side plate 502 and a fourth side plate 503 which are arranged on two sides of the second bottom plate 501, the lower fixing groove 5 is suitable for penetrating through the rectangular hole 302, so that the third side plate 502 is positioned in the first side wall 1601, the fourth side plate 503 is positioned outside the first plate-shaped portion 301, and the first bottom plate 401 abuts against the lower hole wall of the rectangular hole 302; the sealing assembly is hermetically connected outside the first plate-shaped portion 301, and is connected with the first side plate 402, the second side plate 403, the third side plate 502 and the fourth side plate 503 through screws. In the installation of this embodiment, the first fixing structure is first fixedly installed outside one of the first side walls 1601, specifically, one of the fixing frames 3 is first placed outside the first side wall 1601, such that the rectangular hole 302 of the fixing frame 3 is aligned with the installation through hole on the first side wall 1601, then the first side plate 402 of the upper fixing groove 4 is passed through the strip-shaped hole and the installation through hole, such that the first side plate 402 abuts against the inner side of the first side wall 1601, the second side plate 403 abuts against the outer side of the first plate-shaped portion 301, the first bottom plate 401 abuts against the upper hole wall of the rectangular hole 302, then the third side plate 502 of the lower fixing groove 5 is passed through the strip-shaped hole and the installation through hole, such that the third side plate 502 abuts against the inner side of the first side wall 1601, the fourth side plate 503 abuts against the outer side of the first plate-shaped portion 301, the first bottom plate 401 abuts against the lower hole wall of the rectangular hole 302, and then the sealing assembly is hermetically connected outside the first plate-shaped portion 301, and is connected to the first side plate 402, the second side plate, and the second side plate 3 are placed outside the first side plate 301, and the second side plate, and the second bottom plate, and the third side plate, and the third bottom plate, and the third side plate, and the third bottom plate, and the third side plate, and the bottom plate, the second side plate 403, the third side plate 502 and the fourth side plate 503 are connected through screws; then, the hinge shaft 2 is fixed to the baffle 1 such that the baffle 1 and the hinge shaft 2 enter the coal chute 16 through the installation through-hole of the other first sidewall 1601 and one end of the hinge shaft 2 is inserted into the first hinge hole 303, and then the second fixing structure is fixedly installed to the other first sidewall 1601 in such a manner that the first fixing structure is installed. The installation is simple and convenient, and can prevent that the dust from revealing through the installation through-hole department. In an alternative embodiment, the first fixing structure and the second fixing structure are different in structure, for example, the first fixing structure has only one first hinge hole 303 without a rectangular hole 302, the first fixing structure and the first sidewall 1601 are connected by screws, and the second fixing structure includes a fixing frame 3, an upper fixing groove 4, a lower fixing groove 5 and a sealing assembly. In another alternative embodiment, the first fixing structure includes the fixing frame 3, the upper fixing groove 4, the lower fixing groove 5 and the sealing assembly, and the second fixing structure has only one second hinge hole 304 without the rectangular hole 302.

In addition to the above embodiments, in a preferred embodiment, the fixing frame 3 further includes second plate-like portions 305, the second plate-like portions 305 are provided at both ends of the first plate-like portion 301, and the second plate-like portions 305 are adapted to abut against the outside of the second side wall adjacent to the first side wall 1601. In this embodiment, the second plate-like portion 305 is provided, so that the fixing frame 3 is held outside the coal chute 16, and the first and second fixing structures are more firmly connected to the coal chute 16. Of course, in other alternative embodiments, the fixing frame 3 may comprise only the first plate-like portion 301.

On the basis of the above embodiment, in a preferred embodiment, the first plate-shaped portion 301 is provided with a mounting groove, the sealing assembly includes a first sealing gasket 6 and a sealing plate 7, the first sealing gasket 6 is disposed in the mounting groove, specifically, the first sealing gasket 6 is in a rectangular frame structure, and the sealing plate 7 is located outside the second side plate 403 and the fourth side plate 503 and is connected with the first side plate 402, the second side plate 403, the third side plate 502 and the fourth side plate 503 through screws. When the installation is specifically carried out, the first sealing gasket 6 is arranged in the installation groove firstly, then the upper fixing groove 4 and the lower fixing groove 5 are respectively installed, and finally the sealing plate 7 is connected with the first side plate 402, the second side plate 403, the third side plate 502 and the fourth side plate 503 through screws, so that the dust can be effectively prevented from leaking through the installation through holes. In an alternative embodiment, the seal assembly may comprise only the seal plate 7.

On the basis of the above embodiment, in a preferred embodiment, the baffle 1 is provided with a second sealing gasket 8 around the outside, and when the baffle 1 is located at the blocking position, the second sealing gasket 8 is in sealing connection with the inner wall of the coal dropping pipe 16. In this embodiment, by providing the second packing 8 on the outer periphery of the baffle plate 1, it is ensured that dust does not return upward through the gap between the baffle plate 1 and the coal chute 16 when the baffle plate 1 is in the blocking position.

On the basis of the above embodiments, in a preferred embodiment, the baffle 1 is made of a three-proof needle punched felt which has waterproof, fireproof and antistatic performances, is made of a lighter material, and can reduce the power consumption of the driving assembly. Of course, in other alternative embodiments, the baffle 1 may be made of other materials capable of blocking dust, such as plastic, wood, steel, etc.

In addition to the above embodiments, in a preferred embodiment, the dust suppressing structure further includes a bearing seat 9 and a bearing provided in the bearing seat 9, the bearing seat 9 is mounted on the first plate-like portion 301, and the hinge shaft 2 is provided in the bearing. In this embodiment, the bearing seat 9 and the bearing are provided to ensure that the hinge shaft 2 can smoothly rotate, and to effectively support and limit the hinge shaft 2.

On the basis of the above embodiment, in a preferred embodiment, the driving assembly comprises a driving motor 10, a driving gear 11 and a driven gear 12, the driving motor 10 is adapted to be fixed outside the coal dropping pipe 16, the driving gear 11 is connected outside an output shaft of the driving motor 10, and the driven gear 12 is fixed outside the hinge shaft 2 and is in meshed connection with the driving gear 11. As shown in the figure, the driving gear 11 is a small gear, and the driven gear 12 is a large gear, so that the rotation speed of the baffle 1 can be reduced, and the position of the baffle 1 can be controlled. In an alternative embodiment, the drive assembly may comprise only the drive motor 10, directly connecting the hinge shaft 2 with the output shaft of the drive motor 10.

Specifically, the dust suppression structure comprises a gear box 14, a driving gear 11 and a driven gear 12 are assembled in the gear box 14, and the gear box 14 can be fixed outside a coal dropping pipe 16.

In addition to the above embodiments, in a preferred embodiment, the dust suppressing structure further includes a stopper 13, both ends of the stopper 13 are provided in the first plate-like portion 301, and the stopper 13 is located above the baffle 1. In this embodiment, the stopper rod 13 is provided to limit the position of the flapper 1 and prevent the flapper 1 from rotating excessively.

As shown in fig. 1, the stopper rod 13 includes a rod body 1301 and a protrusion 1302 located at two ends of the rod body 1301, an end face of the protrusion 1302 is rectangular, and the length of the protrusion 1302 is greater than the width of the rectangular hole 302, when the stopper rod 13 is installed, the rod body 1301 and the protrusion 1302 can pass through the installation through hole by rotating the stopper rod 13, and then the stopper rod 13 is rotated to limit the protrusion 1302 at the outer side of the first plate-shaped portion 301, so as to prevent the stopper rod 13 from moving along the length direction thereof.

Example 2

The embodiment provides a coal conveying and crushing system. In one embodiment, including a coal pulverizer and the dust suppression structure provided in the above example, the dust suppression structure is installed in the coal drop tube 16 above the coal pulverizer, as shown in FIG. 3.

In this embodiment, by installing a dust suppression structure in the coal dropping pipe 16, when the coal breaker starts to start, the driving assembly is controlled to keep the baffle 1 at the blocking position to prevent dust from returning upwards through the coal dropping pipe 16, and when the coal conveying belt starts to operate to convey coal, the driving assembly is controlled to rotate the baffle 1 to the open position, so that coal can smoothly enter the coal breaker below through the coal dropping pipe 16.

The above embodiments have been described in detail with respect to the process of installing the dust suppressing structure to the coal chute 16, and the present embodiment will not be described in detail.

On the basis of the above embodiment, in a preferred embodiment, the coal conveying and crushing system further includes a delay controller, the delay controller is in communication connection with the driving assembly and the coal crusher, and is configured to control the driving assembly to operate after the coal crusher starts to operate for a preset time, so that the baffle 1 rotates from the blocking position to the opening position, and control the driving assembly to operate after the coal crusher stops to operate for the preset time, so that the baffle 1 rotates from the opening position to the blocking position. In this embodiment, when the whole coal conveying and pulverizing system is not operated, the damper 1 is in the blocking position, and the driving motor 10 is not energized, and the damper 1 is kept in the blocking position. When the coal conveying and crushing system receives a command of needing to convey coal, the coal crusher needs to be started at the moment, the delay controller receives a signal that the coal crusher is started, the coal crusher is controlled to be powered for the driving assembly after being started for a preset time, the driving assembly is enabled to work, the baffle 1 is rotated to the opening position, and the baffle 1 is located at the blocking position within the preset time when the coal crusher is started, so that dust can be prevented from being upwards returned through the coal dropping pipe 16. The preset time may be several seconds. When the baffle 1 rotates to the opening position, the power supply to the driving assembly is stopped, so that the baffle 1 is kept at the opening position, and the coal conveying can be normally carried out. After the coal crusher stops working, a signal is sent to the delay controller, the delay controller receives the signal that the coal crusher stops working, the coal crusher is controlled to stop working for a preset time, then power is supplied to the driving assembly, the driving assembly works, and the baffle plate 1 is rotated to a blocking position.

On the basis of the above embodiments, in a preferred embodiment, a position sensor is disposed on the inner wall of the coal dropping pipe 16 or the baffle 1, and the delay controller is connected to the driving assembly and is configured to control the driving assembly to stop working when the position sensor detects that the baffle 1 rotates from the blocking position to the opening position and rotates from the opening position to the blocking position. In the embodiment, when the baffle 1 rotates from the blocking position to the opening position, the position sensor detects that the baffle 1 rotates in place, the position sensor sends a signal to the delay controller, and the delay controller controls the driving assembly to stop supplying power so as to keep the baffle 1 at the opening position; when the baffle 1 rotates to the blocking position from the opening position, the position sensor detects that the baffle 1 rotates in place, the position sensor sends a signal to the delay controller, and the delay controller controls the driving assembly to stop supplying power, so that the baffle 1 is kept at the blocking position.

An electrical box 15 is arranged outside the coal dropping pipe 16, and a delay controller and a power supply for supplying power to the driving assembly are arranged in the electrical box 15.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.