Sealed mill outlet gate

Abstract

The utility model discloses a sealed coal mill outlet door belongs to coal mill technical field. It includes the connecting seat, and the connecting seat top is equipped with the coal outlet that is connected with the coal mill outlet, and the bottom is equipped with the sliding mouth, and the connecting seat is equipped with the floating cavity that is connected with the coal outlet, and the floating cavity is equipped with the closing door, the linear push mechanism output end is connected with the push ring, and the push ring is connected with the sliding mouth sliding, and the push ring is butt joint with the closing door, the sliding frame is equipped with the storage cavity that is used for receiving the closing door with the floating cavity intercommunication, and the sliding frame is equipped with the linear traction mechanism, and the linear traction mechanism is connected with the closing door. The utility model discloses through linear traction mechanism and realizes the opening and closing of closing door, and simultaneously realizes the airtight compression of closing door through the push ring, guarantees the sealing effect.

Description

Technical Field

[0001] This utility model relates to a sealed coal mill outlet door, belonging to the field of coal mill technology. Background Technology

[0002] Inadequate sealing structure: Many sealed coal mill outlet doors employ sealing methods that, while preventing coal ash leakage, inadvertently create conditions for coal ash accumulation. For example, some labyrinth seal structures, although effectively blocking most coal ash, allow ash to easily accumulate in the sealing grooves. As operating time increases, the accumulated coal ash grows larger and larger, eventually obstructing the normal opening and closing of the outlet door, leading to jamming. Improperly designed gap between the door body and frame: A suitable gap is needed between the door body and frame of the exit door to ensure smooth opening and closing. If the gap is too small, during equipment operation, vibrations and other factors can easily cause minor deformations in the door frame and body, further reducing the gap. In this case, even a small amount of coal ash entering may be squeezed into the gap, gradually accumulating and jamming the exit door. Conversely, if the gap is too large, coal ash can more easily enter in large quantities, also causing ash jamming problems. Poor design of moving parts: Exit doors typically include moving parts such as hinges and rollers for opening and closing. However, in some designs, these moving parts lack adequate protection and are easily corroded by coal ash. Coal ash entering the joints or rolling parts of the moving parts increases friction, causing the parts to move sluggishly and ultimately leading to the exit door jamming.

[0003] The existing technology mainly uses a butterfly valve-type outlet gate structure, which makes it easy for coal powder to get stuck in the valve plate and valve hole. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, which mainly uses butterfly valve-type outlet gate structures, where coal powder can easily get stuck in the valve plate and valve hole, and to provide a sealed coal mill outlet gate.

[0005] To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution: A sealed coal mill outlet gate, comprising: A connecting seat, wherein the top of the connecting seat is provided with a coal outlet connected to the coal mill outlet, and the bottom is provided with a sliding port; the connecting seat is provided with a floating cavity connected to the coal outlet, and the floating cavity is provided with a sealing door; A linear push mechanism, wherein the output end of the linear push mechanism is connected to a push ring, the push ring is slidably connected to a sliding port, and the push ring abuts against a closed door; A sliding frame, wherein the sliding frame has a storage cavity communicating with the floating cavity for storing a closed door, and the sliding frame is provided with a linear traction mechanism, which is connected to the closed door.

[0006] Optionally, a limiting ring is provided on the connecting seat at the position corresponding to the coal outlet, and a first nozzle is arranged in a ring array on the side where the floating cavity intersects with the limiting ring. The first nozzle is connected to the air compressor through an internal pipeline built into the sliding frame.

[0007] Optionally, the sliding frame is provided with a plurality of second nozzles and ash discharge holes, and the second nozzles are connected to the air compressor through pipelines.

[0008] Optionally, the outer ring of the closed door is provided with a plurality of first sealing grooves, and the limiting ring is provided with a plurality of second sealing grooves concentrically.

[0009] Optionally, the outer ring of the closed door is provided with a main sealing ring that mates with the first sealing groove.

[0010] Optionally, the connecting seat is provided with a plurality of guide posts, and the pushing ring is provided with a plurality of guide holes that slide with the guide posts.

[0011] Optionally, the linear push mechanism includes a stepper motor on a fixed connecting seat, a worm gear on the rotating shaft of the stepper motor, and a ruler strip on the side of the push ring that meshes with the worm gear.

[0012] Optionally, the inner ring of the push ring is coaxially provided with a dust cover extending downward toward the sliding port.

[0013] Optionally, the telescopic end of the linear traction mechanism is provided with a rotating seat, and the rotating seat is rotatably connected to the side wall of the closed door through a connecting rod.

[0014] Optionally, the closed door is provided with a right-angled limiting groove, and the connecting rod is rotatably connected to the limiting groove, which limits the rotation limit of the connecting rod.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This invention uses a linear traction mechanism to open and close the closed door, and a push ring to press the closed door shut, ensuring a sealing effect. Attached Figure Description

[0016] Figure 1 A schematic diagram of the sealed coal mill outlet door provided in an embodiment of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3A schematic diagram showing the opening of a closed door provided in an embodiment of this utility model.

[0017] In the diagram: 1. Sliding frame; 2. Push cylinder; 3. Cylinder rod; 4. Connecting seat; 5. Limiting ring; 6. Coal outlet; 7. Sealing door; 8. Pushing ring; 9. Guide column; 10. Stepper motor; 11. Worm gear; 12. Scale bar; 13. Dust cover; 14. First nozzle; 15. Internal pipeline; 16. Second nozzle; 17. Rotating seat; 18. Connecting rod; 19. Limiting groove; 20. Main sealing ring; 21. Second sealing groove; 22. Floating cavity; 23. Ash discharge hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] like Figures 1-3 A sealed coal mill outlet door is disclosed, comprising: The connecting seat 4 has a coal outlet 6 at the top that is connected to the coal mill outlet, and a sliding opening at the bottom. The connecting seat 4 also has a floating cavity 22 that is connected to the coal outlet 6, and the floating cavity 22 has a sealing door 7. A linear push mechanism, wherein the output end of the linear push mechanism is connected to a push ring 8, the push ring 8 is slidably connected to the sliding port, and the push ring 8 abuts against the closed door 7; The sliding frame 1 is connected to the side of the connecting seat 4. The sliding frame 1 has a storage cavity for storing the closed door 7 that communicates with the floating cavity 22. The sliding frame 1 is equipped with a linear traction mechanism that is connected to the closed door 7.

[0021] The sealed coal mill outlet gate mainly consists of a connecting seat 4, a sealing door 7, a push ring 8, a sliding frame 1, and related drive and sealing structures. The coal outlet 6 at the top of the connecting seat 4 is connected to the outlet of the coal mill, and a sliding port is provided at the bottom. An annular floating cavity 22 is provided inside the connecting seat 4, and the sealing door 7 is installed inside the floating cavity 22. The sealing and opening / closing operation of the sealing door 7 is realized by a linear push mechanism and a linear traction mechanism.

[0022] In this embodiment, the connecting seat 4 is the basic supporting component of the entire outlet door. Its top coal outlet 6 is connected to the outlet of the coal mill, forming a coal powder conveying channel. The sliding opening at the bottom of the connecting seat 4 provides space for the sliding of the pushing ring 8. The annular floating cavity within the connecting seat 4 has a thickness greater than that of the closed door 7, providing sufficient space for the installation and movement of the closed door 7.

[0023] In this embodiment, the linear pushing mechanism includes a stepper motor 10 fixed to the connecting seat. A worm gear 11 is fixed on the rotating shaft of the stepper motor 10, and a ruler strip 12 that meshes with the worm gear 11 is fixed on the side wall of the pushing ring 8. When the stepper motor 10 works, it drives the worm gear 11 to rotate. Through the meshing of the worm gear 11 and the ruler strip 12, the linear reciprocating motion of the pushing ring 8 is realized. Several guide posts 9 arranged in a ring array on the connecting seat 4 slide in cooperation with the guide holes on the pushing ring 8, ensuring the stable reciprocating sliding of the pushing ring, thereby ensuring the uniformity of the pressure on the closed door.

[0024] In this embodiment, the outer ring of the closed door 7 is provided with several first sealing grooves (unmarked), and the limiting ring 5 is provided with several second sealing grooves 21 concentrically. The closed door 7 is installed in the floating cavity, and its outer ring is provided with a steel main sealing ring 20. One side of the main sealing ring 20 is provided with several annular first sealing grooves. The first sealing grooves can accommodate coal dust. When the closed door is closed, the coal dust can accumulate in the first sealing grooves, reducing the impact on the closure. The steel main sealing ring 20 has greater hardness and can be replaced independently after wear, improving the service life of the closed door.

[0025] In this embodiment, the linear traction mechanism uses a hydraulic cylinder 3, and the rotating seat 17 on its telescopic end is connected to the closed door 7 via a connecting rod 18. The opening and closing of the closed door 7 is achieved through the telescopic movement of the linear traction mechanism. When the closed door 7 needs to be opened, the linear traction mechanism retracts, the connecting rod 18 rotates, and the closed door 7 moves towards the receiving cavity; when the closed door 7 needs to be closed, the linear traction mechanism extends, pushing the closed door 7 back into the floating cavity.

[0026] Several second nozzles 16 and ash discharge holes 23 are arranged in an array inside the sliding frame 1. The second nozzles 16 are connected to the air compressor through pipelines. When the closed door 7 is retracted into the receiving cavity, the second nozzles 16 can blow high-pressure air onto the closed door 7 to clean it. The cleaned coal powder is discharged through the ash discharge holes 23.

[0027] Meanwhile, a ring-shaped first nozzle 14 is arranged in a ring array on the side where the floating cavity 22 meets the limiting ring 5. The first nozzle 14 is connected to the air compressor through an internal pipeline built into the sliding frame 1. During the closing process of the closed door, the first nozzle 14 can eliminate the coal dust located at the junction of the closed door 7 and the limiting ring 5 with high-pressure air, further ensuring the sealing effect.

[0028] The side wall of the closed door 7 is rotatably connected to the rotating seat 17 by a connecting rod 18 with a 90-degree arc. The closed door 7 is provided with a right-angled limiting groove 19, and one end of the connecting rod 18 is rotatably connected to the limiting groove 19. The limiting groove 19 limits the rotation limit of the connecting rod 18. When the closed door 7 is pushed to the limit position, one end of the connecting rod 18 presses against the right-angled surface of the limiting groove 19, so that as the closed door 7 moves axially toward the floating cavity 22, the right-angled surface can also transmit the radial pushing force to the closed door 7, ensuring that the closed door 7 is squeezed into place.

[0029] The outer ring of the push ring 8 is slidably connected to the sliding port, and its end is used to contact the sealing door 7 and press the sealing door 7 against one side of the floating cavity. The inner ring of the push ring 8 is coaxially provided with a dust cover 13 extending downwards towards the sliding port. The dust cover 13 is of rubber structure and is fixed to the bottom of the push ring 8 by a flange. The rubber dust cover 13 has a certain degree of flexibility and is more wear-resistant, which can reduce the contamination of the linear push mechanism by coal dust.

[0030] Work process (a) The closing process of the closed door: When it is necessary to close the coal mill outlet door, the linear traction mechanism is first activated to extend it and push the sealing door 7 from the receiving chamber to the floating chamber 22. During the movement, the annular first nozzle 14 sprays high-pressure air onto the junction of the sealing door 7 and the limiting ring 5 to remove coal dust. When the sealing door 7 reaches the appropriate position in the floating chamber 22, the stepper motor is activated, and through the cooperation of the worm gear 11 and the ruler 12, the pushing ring 8 is pushed towards the sealing door 7, pressing the sealing door 7 against one side of the floating chamber 22. Since there may be coal dust between the floating chamber 22 and the sealing door 7, the pushing of the linear traction mechanism can crush this coal dust to ensure a sealing effect. At the same time, the connecting rod 18, under the action of the limiting groove 19, transmits radial pushing force to the sealing door 7 to ensure that the sealing door 7 is pressed into place.

[0031] (II) The process of opening the closed door: When it is necessary to open the coal mill outlet door, first start the stepper motor 10 to move the push ring 8 in the opposite direction, releasing the pressure on the closed door. Then start the linear traction mechanism to retract it, driving the connecting rod 18 to rotate, and the closed door 7 moves into the receiving cavity. After the closed door 7 is retracted into the receiving cavity, start the air compressor and use the second nozzle 16 to clean the closed door 7 with high-pressure air. The cleaned coal powder is discharged through the ash discharge hole 23.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sealed coal mill outlet gate, characterized in that, include: The connecting seat (4) has a coal outlet (6) at the top connected to the coal mill outlet and a sliding port at the bottom. The connecting seat (4) has a floating cavity (22) connected to the coal outlet (6) and a closing door (7). A linear push mechanism, wherein the output end of the linear push mechanism is connected to a push ring (8), the push ring (8) is slidably connected to the sliding port, and the push ring (8) abuts against the closed door (7); The sliding frame (1) has a storage cavity for storing the closed door (7) that is connected to the floating cavity (22). The sliding frame (1) has a linear traction mechanism that is connected to the closed door (7).

2. The sealed coal mill outlet gate according to claim 1, characterized in that, The connecting seat (4) is provided with a limiting ring (5) at the position corresponding to the coal outlet (6). A first nozzle (14) is arranged in a ring array on the side where the floating cavity (22) intersects with the limiting ring (5). The first nozzle (14) is connected to the air compressor through an internal pipeline (15) built into the sliding frame (1).

3. The sealed coal mill outlet gate according to claim 1, characterized in that, The sliding frame (1) is provided with several second nozzles (16) and ash discharge holes (23). The second nozzles (16) are connected to the air compressor through pipelines.

4. The sealed coal mill outlet gate according to claim 2, characterized in that, The outer ring of the closed door (7) is provided with several first sealing grooves, and the limiting ring (5) is provided with several second sealing grooves (21) concentrically.

5. The sealed coal mill outlet gate according to claim 4, characterized in that, The outer ring of the closed door (7) is provided with a main sealing ring (20) that cooperates with the first sealing groove.

6. The sealed coal mill outlet gate according to claim 1, characterized in that, The connecting seat (4) is provided with several guide posts (9), and the pushing ring (8) is provided with several guide holes that slide with the guide posts (9).

7. The sealed coal mill outlet gate according to claim 1, characterized in that, The linear push mechanism includes a stepper motor (10) on a fixed connecting seat, a worm gear (11) on the rotating shaft of the stepper motor (10), and a ruler that meshes with the worm gear (11) on the side of the push ring (8).

8. The sealed coal mill outlet gate according to claim 1, characterized in that, The inner ring of the push ring (8) is coaxially provided with a dust cover (13) extending downward toward the sliding port.

9. The sealed coal mill outlet gate according to claim 1, characterized in that, The telescopic end of the linear traction mechanism is provided with a rotating seat (17), and the rotating seat (17) is rotatably connected to the side wall of the closed door (7) by a connecting rod (18).

10. The sealed coal mill outlet gate according to claim 9, characterized in that, The closed door (7) is provided with a right-angled limiting groove (19), and the connecting rod (18) is rotatably connected to the limiting groove (19). The limiting groove (19) limits the rotation limit of the connecting rod (18).

Images