Discharge air lock valve, open-close structure for discharge air lock valve and working method thereof

Abstract

The present application belongs to the technical field of engineering elements, and particularly relates to a wind-lock valve for unloading, and especially relates to a wind-lock valve for unloading, an opening and closing structure for the wind-lock valve for unloading and a working method thereof. In the opening and closing structure for the wind-lock valve for unloading, a cleaning assembly is arranged between a valve plate and a material plate. In the resetting and closing process of the valve plate, the cleaning assembly is rotated towards the center of a material port under the driving of the valve plate, and the residual material on the top surface of the valve plate is actively pushed upwards along the valve plate, so that the material pad is avoided between the sealing surfaces, the valve plate can be completely attached to the material port, the sealing gap is fundamentally eliminated, the air leakage problem is avoided, the residual material is timely removed, and the abrasion of the arc-shaped sealing strip and the sealing surface of the valve plate caused by repeated rolling and friction of the material is avoided.

Description

Technical Field

[0001] This invention belongs to the field of engineering components technology, specifically relating to an airlock valve for unloading, and more particularly to an airlock valve for unloading, an opening and closing structure for the airlock valve for unloading, and its working method. Background Technology

[0002] In the cement clinker production process, thermal equipment such as preheaters, decomposition furnaces, and coolers widely use unloading airlock valves to control the flow of materials and ensure airtight isolation.

[0003] In related technologies, during the unloading process of a discharge airlock valve, material slides down the valve plate and is discharged. However, due to the large differences in the fluidity of cement clinker powder and the tendency of some materials to adhere, some material often remains on the top surface of the valve plate. When the counterweight flap assembly drives the valve plate to reset and fits against the material plate, the residual material will be trapped between the sealing surfaces, preventing the valve plate from fully fitting against the material plate, creating a sealing gap and causing air leakage. After long-term use, the residual material will also accelerate the wear of the sealing surface, further deteriorating the sealing performance.

[0004] Therefore, how to avoid material residue between the valve plate and the material plate is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one unloading airlock valve, an opening and closing structure for the unloading airlock valve, and a method for its operation.

[0007] In a first aspect, embodiments of this disclosure provide an opening and closing structure for a discharge airlock valve, which is disposed on the valve pipe of the discharge airlock valve, comprising: A material plate with a material outlet in its middle, and the material plate is inclinedly arranged inside the valve tube; A rotating shaft is rotatably mounted on the top of the material plate; A valve plate, which is fixedly connected to the rotating shaft; The counterweight flap assembly is fixedly installed at both ends of the rotating shaft; The middle part of the feed inlet is divided into an upper part and a lower part along the horizontal direction; An arc-shaped sealing strip is provided between the bottom surface of the upper part of the feed port and the valve plate; A cleaning component is rotatably installed on the bottom surface of the lower part of the feed inlet; When the counterweight flap assembly drives the valve plate to rotate to abut against the material inlet, the upper part of the material inlet is sealed to the valve plate by an arc-shaped sealing strip, and the lower part of the material inlet is sealed to the top surface of the valve plate by a cleaning assembly. The rotation of the valve plate drives the cleaning assembly to rotate toward the center of the material inlet, so as to push the material on the top surface of the valve plate upward along the valve plate.

[0008] In one alternative embodiment, the cleaning assembly includes a plurality of cleaning elements rotatably disposed at the feed inlet; The plurality of cleaning components are arranged circumferentially along the lower part of the feed inlet; When the lower part of the feed port is sealed by the cleaning assembly against the top surface of the valve plate, the sidewalls of two adjacent cleaning components are in contact with each other.

[0009] In one optional embodiment, a rotating groove is provided at the fitting point between the material plate and the cleaning component; The cleaning component is rotatably connected to the rotating rod in the rotating groove via a rotating arm.

[0010] In one optional embodiment, one end of the rotating arm is fixedly connected to the cleaning component, and the other end is provided with a snap-fit ​​portion; The rotating arm is fastened to the rotating rod via the snap-fit ​​part.

[0011] In one optional embodiment, the cross-section of the cleaning component is a right-angled trapezoid; When the lower part of the feed port is sealed by the cleaning component against the top surface of the valve plate, the upper and lower top surfaces of the cleaning component abut against the bottom surface of the feed port and the top surface of the valve plate, respectively. The inclined surface of the cleaning component is positioned facing the material in the feed inlet.

[0012] In one optional embodiment, a limiting plate is further provided on the bottom surface of the lower part of the feed port; When the weight of the material accumulated on the valve plate reaches a preset value, it drives the valve plate to rotate and open the material port. Under the action of gravity, the cleaning component rotates away from the center of the material port and rotates until it abuts against the limiting plate.

[0013] In one optional embodiment, the limiting plate is L-shaped; Furthermore, the sidewall of the horizontal section of the limiting plate is provided with an inclined abutment surface to support the cleaning component; When the valve plate rotates to abut against the feed inlet, the outer wall of the valve plate abuts against the side wall of the horizontal section of the limiting plate.

[0014] In one optional embodiment, the counterweight flap assembly includes: A connecting rod, one end of which is fixedly connected to the rotating shaft; A counterweight is located at the other end of the rotating shaft; A support frame is disposed below the connecting rod; A horizontal buffer assembly is disposed at the end of the support frame and abuts against the connecting rod; When the valve plate rotates to abut against the feed inlet, the connecting rod rotates downward under the gravity of the counterweight to squeeze the horizontal buffer assembly, thereby buffering the impact between the valve plate and the cleaning assembly.

[0015] Secondly, this disclosure also provides a discharge airlock valve, comprising: Valve tube; The unloading airlock valve described above uses an opening and closing structure, which is installed on the valve pipe.

[0016] Thirdly, this disclosure also provides a working method for using the opening and closing structure of the unloading airlock valve as described above, the working method comprising: When the weight of the material accumulated on the valve plate reaches a preset value, it causes the valve plate to flip. The cleaning component rotates away from the center of the feed inlet under the action of gravity, so that the material on the valve plate falls from the feed inlet; After unloading is completed, the valve plate rotates under the drive of the counterweight flap assembly; When the valve plate rotates to abut against the feed port, the upper part of the feed port is sealed to the valve plate by the arc-shaped sealing strip, and the lower part of the feed port is sealed to the top surface of the valve plate by the cleaning component. The rotation of the valve plate causes the cleaning assembly to rotate toward the center of the feed inlet, thereby pushing the material on the top surface of the valve plate upwards along the valve plate.

[0017] The beneficial effects of this invention are that the unloading airlock valve, the unloading airlock valve opening and closing structure and its working method, by setting a cleaning component between the valve plate and the material plate, during the valve plate reset and closing process, the cleaning component rotates towards the center of the material port under the drive of the valve plate, actively pushing the residual material on the top surface of the valve plate upward along the valve plate, avoiding the material from being stuck between the sealing surfaces, ensuring that the valve plate can completely fit with the material port, fundamentally eliminating the sealing gap, preventing air leakage, and timely removing residual material, avoiding the wear caused by repeated crushing and friction of material on the arc-shaped sealing strip and the sealing surface of the valve plate.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of the opening and closing structure of the unloading airlock valve provided in an embodiment of this disclosure; Figure 2 A schematic diagram of a partial structural state of the unloading airlock valve opening and closing structure provided in this embodiment of the present disclosure when the material inlet is closed; Figure 3 A schematic diagram of a partial structural state of the unloading airlock valve opening and closing structure provided in this embodiment of the present disclosure when the material port is opened; Figure 4 A schematic diagram of the state of the cleaning assembly and the limiting plate for the opening and closing structure of the unloading airlock valve provided in this embodiment of the disclosure; Figure 5 A cross-sectional view of the unloading airlock valve provided in an embodiment of this disclosure; Figure 6 A flowchart illustrating the working method of the opening and closing structure for the unloading airlock valve provided in this embodiment of the disclosure.

[0022] In the diagram: 100, material plate; 110, material inlet; 111, upper part; 112, lower part; 120, rotating groove; 121, rotating rod; 1211, snap-fit ​​part; 130, limiting plate; 131, inclined bearing surface; 200, rotating shaft; 300, valve plate; 330, arc-shaped sealing strip; 340, cleaning assembly; 341, cleaning component; 342, rotating arm; 400, counterweight flap assembly; 410, connecting rod; 420, counterweight block; 430, support frame; 440, horizontal buffer assembly; 500, valve pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] Research has revealed that during the unloading process of the discharge airlock valve, material slides down the valve plate and is discharged. However, due to the significant differences in the flowability of cement clinker powder and the tendency of some materials to adhere, some material often remains on the top surface of the valve plate. When the counterweight flap assembly moves the valve plate back to its original position and fits against the material plate, the residual material will accumulate between the sealing surfaces, preventing the valve plate from fully adhering to the material plate and creating a sealing gap, resulting in air leakage. With prolonged use, the residual material will also accelerate the wear of the sealing surfaces, further deteriorating the sealing performance.

[0026] Based on the above research, this disclosure provides a discharge airlock valve, an opening and closing structure for the discharge airlock valve, and its working method. By setting a cleaning component 340 between the valve plate 300 and the material plate 100, during the valve plate 300 reset and close process, the cleaning component 340 rotates towards the center of the material port 110 under the drive of the valve plate 300, actively pushing the material remaining on the top surface of the valve plate 300 upward along the valve plate 300, avoiding the material from being stuck between the sealing surfaces, ensuring that the valve plate 300 can completely fit with the material port 110, fundamentally eliminating the sealing gap, preventing air leakage, and timely removal of residual material, avoiding wear caused by repeated crushing and friction of material on the arc-shaped sealing strip 330 and the sealing surface of the valve plate 300.

[0027] The shortcomings of the above solutions are the result of the inventors' practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure embodiments in this article should be considered as contributions made by the inventors during the development of the present disclosure embodiments.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figure 1At least one embodiment provides an opening and closing structure for a discharge airlock valve, which is disposed on the valve pipe 500 of the discharge airlock valve, including: a material plate 100, with a material port 110 in its middle, and the material plate 100 is inclinedly disposed within the valve pipe 500; a rotating shaft 200, which is rotatably disposed on the top of the material plate 100; a valve plate 300, which is fixedly connected to the rotating shaft 200; a counterweight flap assembly 400, which is fixedly disposed at both ends of the rotating shaft 200; the middle of the material port 110 is divided into an upper part 111 and a lower part 112 in the horizontal direction; an arc-shaped sealing strip 330 is disposed between the bottom surface of the upper part 111 of the material port 110 and the valve plate 300; a cleaning assembly 34 is rotatably disposed on the bottom surface of the lower part 112 of the material port 110. 0; When the counterweight flap assembly 400 drives the valve plate 300 to rotate to abut against the feed port 110, the upper part 111 of the feed port 110 is sealed to the valve plate 300 by the arc-shaped sealing strip 330, and the lower part 112 of the feed port 110 is sealed to the top surface of the valve plate 300 by the cleaning assembly 340. The rotation of the valve plate 300 drives the cleaning assembly 340 to rotate towards the center of the feed port 110, so as to push the material on the top surface of the valve plate 300 upward along the valve plate 300. When the weight of the material accumulated on the valve plate 300 reaches a preset value, it drives the valve plate 300 to rotate and open the feed port 110. Under the action of gravity, the cleaning assembly 340 rotates away from the center of the feed port 110 (rotation direction as shown). Figure 2 As shown in Figure F), so that the material on the valve plate 300 falls from the feed port 110.

[0031] By setting a cleaning component 340 between the valve plate 300 and the material plate 100, during the valve plate 300 reset and close process, the cleaning component 340 rotates towards the center of the material port 110 under the drive of the valve plate 300, actively pushing the material remaining on the top surface of the valve plate 300 upward along the valve plate 300, avoiding material residue on the sealing surface between the valve plate and the material plate, ensuring that the valve plate 300 can completely fit with the material port 110, fundamentally eliminating the sealing gap, preventing air leakage, and timely removal of residual material, avoiding wear caused by repeated crushing and friction of material on the arc-shaped sealing strip 330 and the sealing surface of the valve plate 300.

[0032] Please continue reading. Figure 1 and Figure 4 The cleaning assembly 340 includes a plurality of cleaning components 341 rotatably disposed on the feed port 110; the plurality of cleaning components 341 are arranged circumferentially along the lower part 112 of the feed port 110; when the lower part 112 of the feed port 110 is sealed against the top surface of the valve plate 300 by the cleaning assembly 340, the sidewalls of two adjacent cleaning components 341 are in contact with each other.

[0033] By splicing multiple cleaning components 341 to form a continuous sealing surface, the sealing performance is ensured when the feed port 110 is closed. Furthermore, the seamless fit between adjacent cleaning components 341 ensures the integrity of the seal around the lower part 112 of the feed port 110, further improving the sealing reliability.

[0034] For a preferred embodiment, please refer to Figure 2 and Figure 3 The material plate 100 and the cleaning component 341 can also be provided with a rotating groove 120 at the fitting point; the cleaning component 341 is rotatably connected to the rotating rod 121 in the rotating groove 120 through a rotating arm 342.

[0035] The cooperation between the rotating groove 120 and the rotating rod 121 provides a stable rotation fulcrum for the cleaning component 341, ensuring that the cleaning component 341 can rotate smoothly under the drive of the valve plate 300, and avoiding shaking and jamming of the cleaning component 341 during the movement process.

[0036] Specifically, one end of the rotating arm 342 is fixedly connected to the cleaning component 341, and the other end is provided with a snap-fit ​​part 1211; the rotating arm 342 is fastened to the rotating rod 121 through the snap-fit ​​part 1211.

[0037] Please see Figure 1 and Figure 2 The cleaning component 341 has a right-angled trapezoidal cross section. When the lower part 112 of the feed port 110 is sealed by the cleaning component 340 against the top surface of the valve plate 300, the upper and lower top surfaces of the cleaning component 341 abut against the bottom surface of the feed port 110 and the top surface of the valve plate 300, respectively. The inclined surface of the cleaning component 341 is set towards the material in the feed port 110.

[0038] By abutting the upper and lower surfaces of the cleaning component 341 against the bottom surface of the feed inlet 110 and the top surface of the valve plate 300, respectively, the sealing between the feed plate 100 and the valve plate 300 is ensured. Simultaneously, the inclined surface facing the material guides the material during the cleaning process, reducing the impact of the material on the components on the bottom surface of the feed plate 100.

[0039] Please see Figure 3 The bottom surface of the lower part 112 of the feed port 110 is also provided with a limiting plate 130; when the weight of the material accumulated on the valve plate 300 reaches a preset value, the valve plate 300 is driven to rotate and the feed port 110 is opened, the cleaning component 340 rotates away from the center of the feed port 110 under the action of gravity, and rotates to abut against the limiting plate 130.

[0040] The maximum opening angle of the cleaning assembly 340 is limited by the limiting plate 130, thereby ensuring that when the valve plate 300 closes with the material plate 100, it can push the cleaning component 341 in the cleaning assembly 340 to reset.

[0041] Please see Figure 3 The limiting plate 130 is L-shaped; and the side wall of the horizontal section of the limiting plate 130 is provided with an inclined abutment surface 131 to support the cleaning assembly 340; when the valve plate 300 rotates to abut against the material port 110, the outer side wall of the valve plate 300 abuts against the side wall of the horizontal section of the limiting plate 130.

[0042] The inclined support surface 131 provides stable support for the cleaning assembly 340, preventing it from loosening in the sealed state; at the same time, the abutment between the limiting plate 130 and the outer wall of the valve plate 300 further enhances the sealing rigidity of the lower part 112 of the material port 110, forming an auxiliary sealing effect and effectively suppressing air leakage.

[0043] Please see Figure 1 The counterweight flap assembly 400 includes: a connecting rod 410, one end of which is fixedly connected to the rotating shaft 200; a counterweight block 420, which is disposed at the other end of the rotating shaft 200; a support frame 430, which is disposed below the connecting rod 410; and a horizontal buffer assembly 440, which is disposed at the end of the support frame 430 and abuts against the connecting rod 410. When the valve plate 300 rotates to abut against the feed port 110, the connecting rod 410 rotates downward under the gravity of the counterweight block 420 to squeeze the horizontal buffer assembly 440, thereby buffering the impact between the valve plate 300 and the cleaning assembly 340.

[0044] By absorbing the impact energy when the valve plate 300 resets through the horizontal buffer component 440, on the one hand, hard collision damage between the valve plate 300 and the cleaning component 340 is avoided, extending the service life of the cleaning component 340 and the sealing strip; on the other hand, the buffering effect of the horizontal buffer component 440 enables the valve plate 300 to smoothly push the cleaning component 340 to rotate, which helps the cleaning component 340 to push and clean residual materials.

[0045] Please see Figure 5 At least one embodiment also provides a discharge airlock valve, including: a valve pipe 500; and an opening and closing structure for the discharge airlock valve as described above, which is disposed on the valve pipe 500.

[0046] By setting a cleaning component 340 between the valve plate 300 and the material plate 100, during the valve plate 300 reset and close process, the cleaning component 340 rotates towards the center of the material port 110 under the drive of the valve plate 300, actively pushing the material remaining on the top surface of the valve plate 300 upward along the valve plate 300, avoiding the material from being stuck between the sealing surfaces, ensuring that the valve plate 300 can be completely fitted with the material port 110, fundamentally eliminating the sealing gap, preventing air leakage, and timely removal of residual material, avoiding wear caused by repeated crushing and friction of material on the arc-shaped sealing strip 330 and the sealing surface of the valve plate 300.

[0047] Please see Figure 6 At least one embodiment also provides a working method for the opening and closing structure of the unloading airlock valve as described above. By setting a cleaning component 340 between the valve plate 300 and the material plate 100, during the reset and closing process of the valve plate 300, the cleaning component 340 rotates towards the center of the material port 110 under the drive of the valve plate 300, actively pushing the material remaining on the top surface of the valve plate 300 upward along the valve plate 300, avoiding the material from being stuck between the sealing surfaces, ensuring that the valve plate 300 can be completely fitted with the material port 110, fundamentally eliminating the sealing gap, preventing air leakage, and timely removal of residual material, avoiding wear caused by repeated crushing and friction of material on the arc-shaped sealing strip 330 and the sealing surface of the valve plate 300.

[0048] Specifically, the working method includes: S110: When the weight of the material accumulated on the valve plate 300 reaches the preset value, the valve plate 300 will be rotated. S120: The cleaning component 340 rotates away from the center of the feed port 110 under the action of gravity, so that the material on the valve plate 300 falls from the feed port 110; S130: After unloading is completed, the valve plate 300 rotates under the drive of the counterweight flap assembly 400; S140: When the valve plate 300 rotates to abut against the material port 110, the upper part 111 of the material port 110 is sealed with the valve plate 300 through the arc-shaped sealing strip 330, and the lower part 112 of the material port 110 is sealed with the top surface of the valve plate 300 through the cleaning assembly 340. S150: The rotation of the valve plate 300 drives the cleaning assembly 340 to rotate toward the center of the feed port 110, so as to push the material on the top surface of the valve plate 300 upward along the valve plate 300.

[0049] The beneficial effects of this invention are that it provides a discharge airlock valve, an opening and closing structure for the discharge airlock valve, and its working method. By setting a cleaning component 340 between the valve plate 300 and the material plate 100, during the valve plate 300's reset and closing process, the cleaning component 340 rotates towards the center of the material port 110 under the drive of the valve plate 300, actively pushing the material remaining on the top surface of the valve plate 300 upward along the valve plate 300, avoiding the material from being stuck between the sealing surfaces, ensuring that the valve plate 300 can completely fit with the material port 110, fundamentally eliminating the sealing gap, preventing air leakage, and timely removing residual material, avoiding wear caused by repeated crushing and friction of material on the arc-shaped sealing strip 330 and the sealing surface of the valve plate 300.

[0050] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 the present invention based on the specific circumstances.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0052] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0053] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An opening and closing structure for a discharge airlock valve, which is disposed on the valve pipe of the discharge airlock valve, characterized in that, include: A material plate (100) has a material outlet (110) in its middle, and the material plate (100) is inclinedly disposed inside the valve tube (500); A rotating shaft (200) is rotatably mounted on the top of the material plate (100); A valve plate (300) is fixedly connected to the rotating shaft (200); The counterweight flap assembly (400) is fixedly installed at both ends of the rotating shaft (200); The middle part of the feed inlet (110) is divided into an upper part (111) and a lower part (112) along the horizontal direction. An arc-shaped sealing strip (330) is provided between the bottom surface of the upper part (111) of the feed port (110) and the valve plate (300). A cleaning component (340) is rotatably provided on the bottom surface of the lower part (112) of the feed inlet (110). When the counterweight flap assembly (400) drives the valve plate (300) to rotate to abut against the material inlet (110), the upper part (111) of the material inlet (110) is sealed with the valve plate (300) by the arc-shaped sealing strip (330), and the lower part (112) of the material inlet (110) is sealed with the top surface of the valve plate (300) by the cleaning assembly (340). The rotation of the valve plate (300) drives the cleaning assembly (340) to rotate toward the center of the material inlet (110) so as to push the material on the top surface of the valve plate (300) upward along the valve plate (300). The cleaning assembly (340) includes a plurality of cleaning components (341) rotatably disposed at the feed inlet (110). Multiple cleaning components (341) are arranged circumferentially along the lower part (112) of the feed inlet (110); When the lower part (112) of the feed port (110) is sealed against the top surface of the valve plate (300) by the cleaning assembly (340), the side walls of two adjacent cleaning components (341) are in contact with each other; A rotating groove (120) is provided at the fitting point between the material plate (100) and the cleaning component (341). The cleaning component (341) is rotatably connected to the rotating rod (121) in the rotating groove (120) via a rotating arm (342); One end of the rotating arm (342) is fixedly connected to the cleaning component (341), and the other end is provided with a snap-fit ​​part (1211). The rotating arm (342) is fastened to the rotating rod (121) by the snap-fit ​​part (1211).

2. The opening and closing structure for the unloading airlock valve as described in claim 1, characterized in that, The cross-section of the cleaning component (341) is a right trapezoid; When the lower part (112) of the feed port (110) is sealed by the cleaning component (340) against the top surface of the valve plate (300), the upper and lower top surfaces of the cleaning component (341) abut against the bottom surface of the feed port (110) and the top surface of the valve plate (300), respectively. The inclined surface of the cleaning component (341) is oriented toward the material in the feed inlet (110).

3. The opening and closing structure for the unloading airlock valve as described in claim 1, characterized in that, A limiting plate (130) is also provided on the bottom surface of the lower part (112) of the feed port (110). When the weight of the material accumulated on the valve plate (300) reaches a preset value, it drives the valve plate (300) to rotate and open the material port (110). Under the action of gravity, the cleaning component (340) rotates away from the center of the material port (110) and rotates to abut against the limiting plate (130).

4. The opening and closing structure for the unloading airlock valve as described in claim 3, characterized in that, The limiting plate (130) is L-shaped; Furthermore, the side wall of the horizontal section of the limiting plate (130) is provided with an inclined abutment surface (131) to support the cleaning assembly (340); When the valve plate (300) rotates to abut against the feed inlet (110), the outer wall of the valve plate (300) abuts against the side wall of the horizontal section of the limiting plate (130).

5. The opening and closing structure for the unloading airlock valve as described in claim 1, characterized in that, The counterweight flap assembly (400) includes: A connecting rod (410), one end of which is fixedly connected to the rotating shaft (200); A counterweight (420) is disposed at the other end of the pivot (200); A support frame (430) is disposed below the connecting rod (410); A horizontal buffer assembly (440) is disposed at the end of the support frame (430) and abuts against the connecting rod (410); When the valve plate (300) rotates to abut against the feed port (110), the connecting rod (410) rotates downward under the gravity of the counterweight (420) to squeeze the horizontal buffer assembly (440), thereby buffering the impact between the valve plate (300) and the cleaning assembly (340).

6. A discharge airlock valve, characterized in that, include: Valve tube (500); The opening and closing structure for the unloading airlock valve as described in any one of claims 1-5 is provided on the valve pipe (500).

7. A method for operating a discharge airlock valve using the opening and closing structure as described in any one of claims 1-5, characterized in that, The working method includes: When the weight of the material accumulated on the valve plate (300) reaches a preset value, the valve plate (300) will flip. The cleaning assembly (340) rotates away from the center of the feed port (110) under the action of gravity, so that the material on the valve plate (300) falls from the feed port (110); After unloading is completed, the valve plate (300) rotates under the drive of the counterweight flap assembly (400); When the valve plate (300) rotates to abut against the feed port (110), the upper part (111) of the feed port (110) is sealed with the valve plate (300) by the arc-shaped sealing strip (330), and the lower part (112) of the feed port (110) is sealed with the top surface of the valve plate (300) by the cleaning assembly (340). The rotation of the valve plate (300) drives the cleaning assembly (340) to rotate toward the center of the feed port (110) so as to push the material on the top surface of the valve plate (300) upward along the valve plate (300).

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