Plug door sealing device

Abstract

The present application relates to the technical field of coal mill plug door and discloses a kind of plug door sealing devices, including installation component and sealing component, installation component includes installation frame, and wind hole is opened in installation frame, installation frame is located between the mixed air duct and plug door of coal mill, and wind hole is communicated with mixed air duct and plug door;Sealing component includes sliding groove, sealing ring and moving piece, sliding groove is opened in installation frame, sealing ring is slidably arranged in sliding groove and extends out of sliding groove, sealing ring is coaxially arranged with mixed air duct, sealing ring is used to contact with the end of mixed air duct, and moving piece is used to drive sealing ring to move towards the direction close to mixed air duct;The plug door sealing device of the embodiment of the present application, through the synergistic effect of installation component and sealing component, can compensate wear gap in time when sealing ring appears wear, and without cutting plug door, sealing ring can be directly disassembled, and the replacement operation of sealing component is simplified.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mill slide gates, specifically relating to a slide gate sealing device. Background Technology

[0002] The cold air gate is a key auxiliary device to ensure the stable operation of the boiler coal mill pulverizing system. It is installed at the branch of the coal mill inlet mixing duct. By adjusting the sealing state of the gate, the inlet hot air temperature of the coal mill is precisely regulated, which directly affects the pulverizing efficiency of the coal mill and the energy consumption level of the entire unit.

[0003] However, the sealing structure of existing cold air sluice gates is mostly integrated inside the gate body. During long-term use, the seals must continuously withstand multiple effects such as airflow scouring, dust abrasion, and temperature fluctuations, which easily leads to wear and aging. This causes gaps to form between the gate panel and the seals, resulting in a decrease in the sealing performance of the sluice gate and an increase in the energy consumption of the entire unit. Furthermore, when the seals are worn, the sluice gate needs to be cut off and the top cover of the gate body needs to be removed to replace the seals, which is very inconvenient. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a door sealing device that can compensate for wear of the sealing element to ensure the sealing performance of the door, and is convenient to disassemble and maintain.

[0005] The door sealing device of this invention includes: The installation component includes an installation frame with air holes. The installation frame is located between the mixing duct and the gate of the coal mill. The air holes are connected to the mixing duct and the gate. A sealing assembly includes a sliding groove, a sealing ring, and a moving part. The sliding groove is formed in the mounting frame. The sealing ring is slidably disposed in the sliding groove and extends out of the sliding groove. The sealing ring is coaxially disposed with the mixing duct. The sealing ring is used to contact the end of the mixing duct. The moving part is used to drive the sealing ring to move towards the mixing duct. The sealing ring contacts the end of the mixing duct to seal the insert door to the mixing duct. When the sealing ring wears, the moving member drives the sealing ring to move closer to the mixing duct so that the insert door is sealed to the mixing duct.

[0006] The door sealing device of this invention uses an external sealing structure where the sealing ring contacts the end of the mixing duct, replacing the original sealing method integrated inside the door body. This reduces the direct effects of airflow erosion, dust abrasion, and temperature fluctuations on the sealing parts, slows down the wear and aging process of the sealing components, maintains the sealing performance of the door for a long time, and avoids increased unit energy consumption due to decreased sealing performance. The sealing ring is driven to move closer to the mixing duct by a moving component, which can promptly compensate for wear gaps when the sealing ring wears. This allows for quick restoration of the sealing effect between the door and the mixing duct without immediate replacement of the sealing ring, effectively solving the core problem of decreased sealing performance after seal wear. The sealing component is independently set between the mixing duct and the door using a mounting frame, and the sealing ring adopts a sliding installation structure. When the sealing ring wears to the point where it cannot be compensated by the moving component and needs replacement, the door can be directly disassembled and reassembled without cutting off the door or removing the top cover plate. This greatly simplifies the replacement operation of the sealing components and reduces the maintenance difficulty and cost of the equipment.

[0007] In some embodiments, a sealing gasket is provided on one side of the sealing ring near the mixing duct, the sealing gasket is in contact with the end of the mixing duct, and the sealing gasket is made of an elastic wear-resistant material.

[0008] In some embodiments, the movable element includes: The mounting slot is formed in the mounting frame and communicates with the sliding slot; An annular mounting base is connected to a sealing ring. The side of the mounting base away from the sealing ring is an inclined surface, which is inclined towards the sealing ring along the direction from the inner circumference of the mounting base to the outer circumference of the mounting base. Multiple movable blocks are spaced apart in the mounting groove along the circumferential direction. The movable blocks are in contact with the inclined surface of the mounting base and move radially along the mounting base. When the movable block moves radially toward the central axis of the mounting base, it engages with the inclined surface of the mounting base, causing the mounting base to drive the sealing ring toward the direction of the mixing duct.

[0009] In some embodiments, the movable member further includes a plurality of embedding slots, which are spaced apart in the mounting slot along the circumferential direction. Each of the plurality of embedding slots corresponds to a plurality of movable blocks, which are slidably disposed in the embedding slots. The embedding slots are used to restrict the radial movement of the movable blocks along the mounting base.

[0010] In some embodiments, the movable component further includes: A toothed ring, which is rotatably disposed in the mounting groove; Multiple arc-shaped grooves are spaced apart on the toothed ring along the circumferential direction. Each arc-shaped groove corresponds to one of the multiple moving blocks. The arc-shaped grooves extend from the outside of the toothed ring to the inside of the toothed ring. Multiple sliding rods, each corresponding to one of the multiple moving blocks, one end of each sliding rod being connected to a moving block, and the other end of each sliding rod being slidably disposed in the arc-shaped groove; When the toothed ring rotates, the arc-shaped groove engages with the sliding rod to cause the moving block to move radially along the mounting base.

[0011] In some embodiments, the door sealing device further includes a rotating assembly, the moving part further includes a gear, the gear is rotatably disposed in the mounting groove, the gear meshes with the gear ring, the gear is used to drive the gear ring to rotate, and the rotating assembly is connected to the gear to drive the gear to rotate.

[0012] In some embodiments, the rotating assembly includes a connecting groove and a rotating rod. One end of the connecting groove is connected to the mounting groove, and the other end of the connecting groove passes through the mounting frame and is connected to the external space. The rotating rod is located in the connecting groove, and the gear is sleeved on the rotating rod.

[0013] In some embodiments, the rotating assembly further includes a locking groove and a locking rod. The mounting groove communicates with the external space through the locking groove, and the locking rod is slidably disposed in the locking groove. The locking groove is used to restrict the rotation of the locking rod, and the locking rod is coaxially disposed and slidably connected to the rotating rod.

[0014] In some embodiments, the rotating rod has an opening slot, the locking rod extends into the opening slot, and a spring connects the locking rod to the inner wall of the opening slot.

[0015] In some embodiments, the locking rod has a hexagonal groove at the end away from the rotating rod. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the present invention.

[0017] Figure 2 This is an isometric side sectional view of the present invention.

[0018] Figure 3 This is the present invention. Figure 2 A magnified view of a portion of point A in the middle.

[0019] Figure 4 This is a schematic diagram of the moving part in the present invention. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the moving part in the present invention. Figure 2 .

[0021] Figure 6 This is a schematic diagram of the moving part in the present invention. Figure 3 .

[0022] Figure 7 This is a schematic diagram of the moving part in the present invention. Figure 4 .

[0023] Figure 8 This is the present invention. Figure 2 A magnified view of a section at point B in the middle.

[0024] Figure label: 1. Installation components; 11. Installation frame; 12. Vent holes; 2. Sealing assembly; 21. Sliding groove; 22. Sealing ring; 23. Moving part; 231. Mounting groove; 232. Mounting base; 233. Moving block; 234. Embedded groove; 235. Gear ring; 236. Arc groove; 237. Sliding rod; 238. Gear; 239. Opening groove; 3. Rotating assembly; 31. Connecting groove; 32. Rotating rod; 33. Locking groove; 34. Locking rod; 35. Opening groove; 36. Spring; 37. Hexagonal groove. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figures 1-8 As shown, the door sealing device of this embodiment includes an installation component 1 and a sealing component 2.

[0027] The mounting component 1 includes a mounting frame 11, on which air holes 12 are provided. The mounting frame 11 is located between the mixing duct and the gate of the coal mill, and the air holes 12 are connected to the mixing duct and the gate. The sealing assembly 2 includes a sliding groove 21, a sealing ring 22, and a moving part 23. The sliding groove 21 is formed in the mounting frame 11. The sealing ring 22 is slidably disposed in the sliding groove 21 and extends out of the sliding groove 21. The sealing ring 22 is coaxially disposed with the mixing duct. The sealing ring 22 is used to contact the end of the mixing duct. The moving part 23 is used to drive the sealing ring 22 to move towards the mixing duct. The sealing ring 22 contacts the end of the mixing duct to seal the slide door with the mixing duct. When the sealing ring 22 wears, the moving part 23 drives the sealing ring 22 to move closer to the mixing duct so that the slide door seals with the mixing duct.

[0028] The door sealing device of this invention uses an external sealing structure where the sealing ring contacts the end of the mixing duct, replacing the original sealing method integrated inside the door body. This reduces the direct effects of airflow erosion, dust abrasion, and temperature fluctuations on the sealing parts, slows down the wear and aging process of the sealing components, maintains the sealing performance of the door for a long time, and avoids increased unit energy consumption due to decreased sealing performance. The sealing ring is driven to move closer to the mixing duct by a moving component, which can promptly compensate for wear gaps when the sealing ring wears. This allows for quick restoration of the sealing effect between the door and the mixing duct without immediate replacement of the sealing ring, effectively solving the core problem of decreased sealing performance after seal wear. The sealing component is independently set between the mixing duct and the door using a mounting frame, and the sealing ring adopts a sliding installation structure. When the sealing ring wears to the point where it cannot be compensated by the moving component and needs replacement, the door can be directly disassembled and reassembled without cutting off the door or removing the top cover plate. This greatly simplifies the replacement operation of the sealing components and reduces the maintenance difficulty and cost of the equipment.

[0029] Specifically, the mounting frame 11 of the mounting component 1 is installed between the mixing duct and the gate of the coal mill, and the air hole 12 on the mounting frame 11 enables the connection between the mixing duct and the gate; the sliding groove 21 of the sealing component 2 is opened in the mounting frame 11, and the sealing ring 22 is slidably disposed in the sliding groove 21 and extends out of the sliding groove 21, and is coaxially arranged with the mixing duct. Under normal conditions, the sealing ring 22 contacts the end of the mixing duct, thereby sealing the gate and the mixing duct; when the sealing ring 22 is worn, the moving part 23 drives the sealing ring 22 to move closer to the mixing duct, making up for the gap caused by the wear of the sealing ring 22, so that the sealing ring 22 is in close contact with the end of the mixing duct again, and the gate and the mixing duct are sealed again.

[0030] In some embodiments, a sealing gasket is provided on one side of the sealing ring 22 near the mixing duct, the sealing gasket is in contact with the end of the mixing duct, and the sealing gasket is made of an elastic wear-resistant material.

[0031] The slide gate sealing device of this invention uses an elastic, wear-resistant material for the sealing gasket. Utilizing the material's elastic deformation capability, the sealing area forms a tighter fit with the end of the mixing duct, filling minute gaps and further improving the sealing accuracy between the slide gate and the mixing duct, reducing air leakage. The wear-resistant properties of the sealing gasket enhance the sealing area's resistance to airflow erosion and dust abrasion, slowing down the wear rate of the sealing components, extending the service life of the sealing assembly, and reducing the frequency of sealing component replacement. The elastic buffering effect of the sealing gasket can offset the deformation caused by slight installation deviations or temperature changes at the end of the mixing duct, maintaining the stability of the seal and preventing a decrease in sealing performance due to minor deformation of the equipment.

[0032] Specifically, the sealing ring 22 of the sealing assembly 2 is fitted with a sealing gasket on the side near the mixing duct. The sealing gasket is made of elastic wear-resistant material. The sealing ring 22 is kept coaxial with the mixing duct in the sliding groove 21. Under normal conditions, the sealing gasket is in direct contact with the end of the mixing duct. The deformation characteristics of the elastic material are used to achieve a tight fit between the sealing ring 22 and the end of the mixing duct, thus completing the seal between the door and the mixing duct. When the sealing ring 22 or the sealing gasket is worn, the moving part 23 drives the sealing ring 22 to move towards the mixing duct. The sealing gasket moves synchronously and continues to fit with the end of the mixing duct, maintaining the sealing effect.

[0033] In some embodiments, the movable element 23 includes a mounting groove 231, an annular mounting base 232, and a plurality of movable blocks 233.

[0034] The mounting slot 231 is formed in the mounting frame 11, and the mounting slot 231 is connected to the sliding slot 21; Mounting base 232 is connected to sealing ring 22. The side of mounting base 232 away from sealing ring 22 is a slope. The slope is inclined from the inner circumference of mounting base 232 to the outer circumference of mounting base 232 toward sealing ring 22. Multiple movable blocks 233 are spaced apart in the mounting groove 231 along the circumferential direction. The movable blocks 233 are in contact with the inclined surface of the mounting base 232 and move radially along the mounting base 232. When the movable block 233 moves radially toward the central axis of the mounting base 232, the movable block 233 engages with the inclined surface of the mounting base 232, so that the mounting base 232 drives the sealing ring 22 to move toward the direction of the mixing duct.

[0035] The door sealing device of this invention, through the inclined surface structure design of the mounting base, transforms the radial movement of the moving blocks into the axial movement of the sealing ring driven by the mounting base. This simple mechanical structure achieves precise gap compensation for the sealing ring, providing a reliable and easily controllable transmission method, thus reducing the technical complexity of seal adjustment. By arranging multiple moving blocks at intervals along the circumference, the mounting base receives a uniformly distributed thrust when under force, driving the sealing ring to move smoothly axially. This prevents the sealing ring from skewing due to uneven force, ensuring the sealing ring's fit accuracy with the end of the mixing duct and preventing localized seal failure.

[0036] Specifically, the mounting groove 231 of the movable component 23 is formed in the mounting frame 11, and the mounting groove 231 is connected to the sliding groove 21; the annular mounting seat 232 is connected to the sealing ring 22, and the side of the mounting seat 232 away from the sealing ring 22 is an inclined surface, which is inclined towards the sealing ring 22 along the direction from the inner circumference of the mounting seat 232 to the outer circumference; multiple movable blocks 233 are spaced apart in the mounting groove 231 along the circumferential direction, the movable blocks 233 are in contact with the inclined surface of the mounting seat 232, and can move radially along the mounting seat 232; when the movable blocks 233 move radially towards the central axis of the mounting seat 232, the movable blocks 233 cooperate with the inclined surface of the mounting seat 232, and the force transmission of the inclined surface pushes the mounting seat 232 to move axially, and then the mounting seat 232 drives the sealing ring 22 to move towards the mixing air duct, thereby realizing the compensation of wear gap.

[0037] In some embodiments, the movable member 23 further includes a plurality of embedding slots 234, which are spaced apart in the mounting slot 231 along the circumferential direction. Each embedding slot 234 corresponds to a plurality of movable blocks 233, which are slidably disposed in the embedding slots 234. The embedding slots 234 are used to restrict the radial movement of the movable blocks 233 along the mounting base 232.

[0038] The door sealing device of this invention limits the movement direction of the moving block by using an embedded groove, ensuring that the moving block can only move radially along the mounting base. This prevents circumferential offset or axial movement of the moving block during movement, ensuring stable contact and force transmission between the moving block and the inclined surface of the mounting base, and preventing adjustment failure or decreased compensation accuracy due to moving block displacement. The one-to-one correspondence between the embedded groove and the moving block provides independent movement guidance and limiting space for each moving block, ensuring that the radial movement of multiple moving blocks remains synchronous and consistent. This further ensures uniform force distribution on the mounting base, driving the sealing ring to move smoothly axially, and maintaining the contact accuracy between the sealing ring and the end of the mixing duct.

[0039] Specifically, multiple embedding grooves 234 of the movable component 23 are spaced apart in the mounting groove 231 along the circumferential direction, and the multiple embedding grooves 234 and multiple movable blocks 233 form a one-to-one matching relationship; the movable blocks 233 are slidably disposed in the corresponding embedding grooves 234, and the embedding grooves 234 constrain the movement direction of the movable blocks 233, so that they can only move radially along the mounting base 232; when the movable blocks 233 move radially along the mounting base 232 towards its central axis, under the limiting action of the embedding grooves 234, the movable blocks 233 will not undergo circumferential offset or axial movement, and can stably cooperate with the inclined surface of the mounting base 232. Through the force transmission of the inclined surface, the mounting base 232 is pushed to move axially, and then the mounting base 232 drives the sealing ring 22 to move towards the mixing air duct, so as to achieve precise compensation of wear gap.

[0040] In some embodiments, the movable element 23 further includes a toothed ring 235, a plurality of arcuate grooves 236, and a plurality of sliding rods 237.

[0041] The toothed ring 235 is rotatably mounted in the mounting groove 231; Multiple arc-shaped grooves 236 are spaced apart on the toothed ring 235 along the circumferential direction. Each arc-shaped groove 236 corresponds to a multiple moving block 233. The arc-shaped grooves 236 extend from the outside of the toothed ring 235 to the inside of the toothed ring 235. Multiple sliding rods 237 correspond one-to-one with multiple moving blocks 233. One end of the sliding rod 237 is connected to the moving block 233, and the other end of the sliding rod 237 is slidably disposed in the arc-shaped groove 236. When the toothed ring 235 rotates, the arc-shaped groove 236 engages with the sliding rod 237 to make the moving block 233 move radially along the mounting base 232.

[0042] The door sealing device of this invention uses the circumferential rotation of the toothed ring to drive the synchronous movement of all arc-shaped grooves, achieving coordinated radial movement of multiple moving blocks. This ensures that the displacement and movement rhythm of each moving block are consistent, further ensuring uniform force on the mounting base and preventing the sealing ring from skewing due to local thrust deviation, thus improving the stability and accuracy of sealing compensation. Through the cooperation of the arc-shaped grooves and the sliding rod, the circumferential rotation of the toothed ring is converted into the radial movement of the moving blocks. The trajectory guidance of the arc-shaped grooves achieves precise conversion of the motion form. The transmission structure is simple and has low mechanical loss, improving the power transmission efficiency of the moving parts. Using the sliding rod as the force transmission medium between the toothed ring and the moving blocks avoids direct hard contact between the moving blocks and the arc-shaped grooves of the toothed ring, reducing friction and wear between components. Simultaneously, the sliding cooperation reduces the risk of movement jamming and extends the overall service life of the moving parts.

[0043] Specifically, the toothed ring 235 of the movable component 23 is rotatably disposed in the mounting groove 231; multiple arc-shaped grooves 236 are spaced apart on the toothed ring 235 along the circumferential direction, and each arc-shaped groove 236 corresponds to a multiple movable block 233. The arc-shaped grooves 236 extend from the outside to the inside of the toothed ring 235; multiple sliding rods 237 correspond to each of the multiple movable blocks 233. One end of the sliding rod 237 is connected to the movable block 233, and the other end is slidably disposed in the corresponding arc-shaped groove 236. When the toothed ring 235 rotates in the mounting groove 231, the arc-shaped grooves 236 move circumferentially synchronously with the toothed ring 235. The arc-shaped grooves 236 cooperate with the sliding rods 237, and the groove wall of the arc-shaped grooves 236 pushes the sliding rods 237 to move, thereby driving the movable blocks 233 connected to the sliding rods 237 to move radially along the mounting base 232, providing power for the subsequent axial clearance compensation of the sealing ring 22.

[0044] In some embodiments, the door sealing device further includes a rotating assembly 3, and the moving part 23 further includes a gear 238. The gear 238 is rotatably disposed in the mounting groove 231. The gear 238 meshes with the gear ring 235 and is used to drive the gear ring 235 to rotate. The rotating assembly 3 is connected to the gear 238 to drive the gear 238 to rotate.

[0045] The door sealing device of this invention uses gear and gear ring meshing transmission. By utilizing the transmission characteristics of gear meshing, it ensures the stability and accuracy of power transmission, avoids problems such as transmission slippage and displacement deviation, and ensures that the rotation angle of the gear ring and the radial displacement of the moving block are accurately matched, thereby improving the accuracy of sealing ring gap compensation.

[0046] Specifically, the door sealing device is equipped with a rotating assembly 3. The gear 238 of the moving part 23 is rotatably mounted in the mounting groove 231, and the gear 238 meshes with the gear ring 235. The rotating assembly 3 is connected to the gear 238 to provide rotational power for the gear 238. When it is necessary to compensate for the wear clearance of the sealing ring 22, the rotating assembly 3 drives the gear 238 to rotate in the mounting groove 231, and the gear 238 drives the gear ring 235 to rotate synchronously through meshing transmission.

[0047] In some embodiments, the rotating assembly 3 includes a connecting groove 31 and a rotating rod 32. One end of the connecting groove 31 is connected to the mounting groove 231, and the other end of the connecting groove 31 passes through the mounting frame 11 and is connected to the external space. The rotating rod 32 is located in the connecting groove 31, and the gear 238 is sleeved on the rotating rod 32.

[0048] The door sealing device of this invention uses a rotating rod with a gear to directly transmit external rotational force to the gear. The transmission path is simple and the torque transmission efficiency is high, which reduces the loss in the power transmission process and ensures that the gear can stably drive the gear ring to rotate.

[0049] Specifically, one end of the connecting groove 31 of the rotating component 3 is connected to the mounting groove 231, and the other end passes through the mounting frame 11 and communicates with the external space; the rotating rod 32 passes through the connecting groove 31, and the gear 238 of the moving component 23 is sleeved on the rotating rod 32, forming a linkage with the rotating rod 32. When it is necessary to drive the gear 238 to rotate, a rotational force is applied to the rotating rod 32 from outside the mounting frame 11, and the rotating rod 32 rotates around its own axis in the connecting groove 31, thereby driving the gear 238 sleeved on it to rotate synchronously.

[0050] In some embodiments, the rotating assembly 3 further includes a locking groove 33 and a locking rod 34. The mounting groove 231 communicates with the external space through the locking groove 33. The locking rod 34 is slidably disposed in the locking groove 33. The locking groove 33 is used to restrict the rotation of the locking rod 34. The locking rod 34 is coaxially disposed with the rotating rod 32 and slidably connected.

[0051] The door sealing device of this invention restricts the rotational freedom of the locking rod by locking groove. The circumferential fixed state of the locking rod can limit the accidental rotation of the rotating rod, and prevent the position of the sealing ring from shifting due to factors such as equipment vibration and accidental contact on site, thus ensuring the stability of the sealing state.

[0052] Specifically, under normal conditions, the locking groove 33 restricts the rotation of the locking rod 34. When it is necessary to rotate the rotating rod 32, the locking rod 34 is pressed, causing the locking rod 34 to move out of the locking groove 33 and into the communicating groove 31, thereby releasing the locking groove 33 from restricting the locking rod 34. Then, the locking rod 34 is rotated, which drives the rotating rod 32 to rotate.

[0053] In some embodiments, the rotating rod 32 has an opening groove 35, the locking rod 34 extends into the opening groove 35, and a spring 36 is connected between the locking rod 34 and the inner wall of the opening groove 35.

[0054] In some embodiments, the locking lever 34 has a hexagonal groove 37 at the end away from the rotating lever 32.

[0055] The door sealing device of this invention, through the setting of the hexagonal groove, facilitates the cooperation of tools with the locking rod, thereby driving the locking rod to move and rotate.

[0056] Specifically, when the rotating rod 32 needs to be rotated, a tool is inserted into the hexagonal slot 37, and then the tool is moved so that the tool drives the locking rod 34 to move into the connecting slot 31. Then the tool is rotated, and the tool drives the rotating rod 32 to rotate through the locking rod 34.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A door sealing device with a sliding door, characterized in that, include: The installation component (1) includes an installation frame (11) with an air hole (12) on it. The installation frame (11) is located between the mixing duct and the gate of the coal mill. The air hole (12) is connected to the mixing duct and the gate. A sealing assembly (2) includes a sliding groove (21), a sealing ring (22), and a moving part (23). The sliding groove (21) is formed in the mounting frame (11). The sealing ring (22) is slidably disposed in the sliding groove (21) and extends out of the sliding groove (21). The sealing ring (22) is coaxially disposed with the mixing duct. The sealing ring (22) is used to contact the end of the mixing duct. The moving part (23) is used to drive the sealing ring (22) to move toward the mixing duct. The sealing ring (22) contacts the end of the mixing duct to seal the insert door with the mixing duct. When the sealing ring (22) wears, the moving part (23) drives the sealing ring (22) to move closer to the mixing duct so that the insert door seals with the mixing duct.

2. The door sealing device according to claim 1, characterized in that, The sealing ring (22) has a sealing gasket on one side near the mixing duct, the sealing gasket is in contact with the end of the mixing duct, and the sealing gasket is made of elastic wear-resistant material.

3. The door sealing device according to claim 1, characterized in that, The movable component (23) includes: The mounting slot (231) is formed in the mounting frame (11) and is connected to the sliding slot (21); An annular mounting base (232) is connected to the sealing ring (22). The side of the mounting base (232) away from the sealing ring (22) is an inclined surface. The inclined surface is inclined towards the sealing ring (22) along the direction from the inner circumference of the mounting base (232) to the outer circumference of the mounting base (232). Multiple movable blocks (233) are spaced apart in the mounting groove (231) along the circumferential direction. The movable blocks (233) are in contact with the inclined surface of the mounting base (232) and move radially along the mounting base (232). When the moving block (233) moves radially toward the central axis of the mounting base (232), the moving block (233) engages with the inclined surface of the mounting base (232) so that the mounting base (232) drives the sealing ring (22) to move toward the direction of the mixing duct.

4. The door sealing device according to claim 3, characterized in that, The movable component (23) further includes a plurality of embedding slots (234), which are spaced apart in the mounting slot (231) along the circumferential direction. Each of the embedding slots (234) corresponds to a plurality of movable blocks (233), which are slidably disposed in the embedding slots (234). The embedding slots (234) are used to restrict the radial movement of the movable blocks (233) along the mounting base (232).

5. The door sealing device according to claim 4, characterized in that, The movable component (23) also includes: A toothed ring (235) is rotatably disposed in the mounting groove (231); Multiple arc-shaped grooves (236) are spaced apart on the toothed ring (235) along the circumferential direction. Each arc-shaped groove (236) corresponds to a multiple moving block (233). The arc-shaped grooves (236) extend from the outside of the toothed ring (235) to the inside of the toothed ring (235). Multiple sliding rods (237) are provided, and each of the multiple sliding rods (237) corresponds to one of the multiple moving blocks (233). One end of each sliding rod (237) is connected to the moving block (233), and the other end of each sliding rod (237) is slidably disposed in the arc-shaped groove (236). When the toothed ring (235) rotates, the arc-shaped groove (236) engages with the sliding rod (237) to make the moving block (233) move radially along the mounting base (232).

6. The door sealing device according to claim 5, characterized in that, It also includes a rotating assembly (3), the moving part (23) further includes a gear (238), the gear (238) is rotatably disposed in the mounting groove (231), the gear (238) meshes with the gear ring (235), the gear (238) is used to drive the gear ring (235) to rotate, and the rotating assembly (3) is connected to the gear (238) to drive the gear (238) to rotate.

7. The door sealing device according to claim 6, characterized in that, The rotating assembly (3) includes a connecting groove (31) and a rotating rod (32). One end of the connecting groove (31) is connected to the mounting groove (231), and the other end of the connecting groove (31) passes through the mounting frame (11) and is connected to the external space. The rotating rod (32) is located in the connecting groove (31), and the gear (238) is sleeved on the rotating rod (32).

8. The door sealing device according to claim 7, characterized in that, The rotating assembly (3) further includes a locking groove (33) and a locking rod (34). The mounting groove (231) is connected to the external space through the locking groove (33). The locking rod (34) is slidably disposed in the locking groove (33). The locking groove (33) is used to restrict the rotation of the locking rod (34). The locking rod (34) is coaxially disposed with the rotating rod (32) and slidably connected.

9. The door sealing device according to claim 8, characterized in that, An opening groove (35) is provided in the rotating rod (32), and the locking rod (34) extends into the opening groove (35). A spring (36) is connected between the locking rod (34) and the inner wall of the opening groove (35).

10. The door sealing device according to claim 8, characterized in that, The locking rod (34) has a hexagonal groove (37) at the end away from the rotating rod (32).

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