Grate, grate cooler module and grate cooler

Abstract

The present application belongs to the technical field of grate coolers, and particularly relates to a grate plate, a grate cooler module and a grate cooler. The grate plate comprises a sleeve plate, a first movable plate and a second movable plate arranged on two sides of the sleeve plate respectively, and the first movable plate and the second movable plate are arranged in the sleeve plate in a reciprocating manner and can be extended or retracted relative to the sleeve plate. The grate cooler drives the telescopic inclined grate plate, uses the lifting effect of the inclined surface on the material when the inclined surface is extended, changes the pushing force on the material from the traditional horizontal static friction force into the inclined pushing force with vertical component force, breaks the locking and static friction between the material particles, enables the pushing force to act on a thicker material layer, and thus improves the effective pushing amount of a single action.

Description

Technical Field

[0001] This invention belongs to the field of grate cooler technology, and particularly relates to a grate plate, a grate cooler module, and a grate cooler. Background Technology

[0002] Traditional grate coolers typically consist of multiple horizontally arranged grate plates as their core conveying component. Driven by a drive unit, these grate plates reciprocate in a horizontal plane. The basic working mechanism is as follows: when the grate plates move towards the discharge port, they rely on the friction between the grate plate surface and the clinker particles to attempt to move the clinker layer above them forward; when the grate plates move in the opposite direction, the clinker tends to stay due to inertia. Thus, after multiple reciprocating cycles, the clinker is conveyed forward in a "stepping" manner on the grate bed.

[0003] However, the conveying power of a grate cooler mainly relies on the horizontal static friction between the grate and the bottom layer of clinker. During the pushing process, this friction can only effectively act on the thin layer of material in direct contact with it. For the thicker upper layer, the pushing effect is drastically reduced due to the slippage between particles within the material. This results in a limited volume of clinker that can be stably pushed in a single stroke, and the effective conveying capacity per unit grate area easily reaches a bottleneck. This problem is particularly pronounced when processing clinker with poor flowability or uneven particle size, often manifesting as uneven material layer distribution, low conveying efficiency, and even potentially affecting the uniformity of material layer permeability, thereby weakening the cooling effect.

[0004] Therefore, how to increase the single-pass push volume of the grate without increasing the complexity of the equipment and power consumption, thereby breaking through the conveying capacity limitation of the traditional structure, is a technical problem that urgently needs to be solved in this field.

[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 grate plate, a grate cooler module, and a grate cooler.

[0007] In a first aspect, embodiments of this disclosure provide a grate, comprising: Sleeve; The first movable plate and the second movable plate are respectively disposed on both sides of the sleeve plate; The first and second movable plates are reciprocally disposed within the sleeve and can extend or retract relative to the sleeve.

[0008] In one optional embodiment, the sleeve plate, the first movable plate, and the second movable plate are each provided with a plurality of through holes.

[0009] In one alternative embodiment, both the first movable plate and the second movable plate are provided with hinge shafts on the side away from the sleeve plate.

[0010] Secondly, embodiments of this disclosure also provide a grate cooler module, comprising: Drive beam; Multiple parallel and spaced front and rear plates, the front and rear plates being arranged in pairs and located on the same side of the drive beam; And the aforementioned grate; The grate plate is adapted to be fixedly installed on the side wall of the drive beam of an adjacent module and is inclined relative to the horizontal plane. The first movable plate is hinged to a front plate belonging to the same module, and the second movable plate is hinged to a rear plate belonging to the same module. The sleeve plate, the first movable plate, the second movable plate, and the front and rear plates connected to the drive beam together form a chamber for conveying materials.

[0011] In one optional embodiment, the front plate is provided with a hinge hole that mates with the hinge shaft of the first movable plate, and the rear plate is provided with a hinge hole that mates with the hinge shaft of the second movable plate.

[0012] In one alternative embodiment, when the sleeve is fixedly mounted on the side wall of the drive beam of the adjacent module, the angle of inclination between it and the horizontal plane is 15° to 45°.

[0013] Thirdly, embodiments of this disclosure also provide a grate cooler, comprising: frame; Multiple grate cooler modules are arranged side by side on the frame, and the grate plate of each grate cooler module is fixedly mounted on the side wall of the drive beam of its adjacent module. A drive mechanism, connected to the drive beam, is used to drive the drive beam to move, thereby causing the first movable plate and / or the second movable plate to extend or retract.

[0014] In one alternative implementation, the drive mechanism is a cylinder, a hydraulic cylinder, or an electric push rod.

[0015] In one alternative implementation, after the first movable plate and / or the second movable plate extend or retract, the through holes on them correspond to the through holes on the sleeve plate to maintain the connectivity of the airflow channel.

[0016] In an alternative embodiment, a cooling air system is also included to provide cooling airflow to the chamber formed by the sleeve plate, the first movable plate, the second movable plate, the front plate, and the rear plate.

[0017] The beneficial effect of this invention is that, by driving a retractable inclined grate, the inclined surface of the grate lifts the material when it extends, transforming the pushing force on the material from the traditional horizontal static friction force into an inclined pushing force with a vertical component. This breaks the locking and static friction between material particles, allowing the pushing force to act on a thicker material layer, thereby increasing the effective pushing amount of a single action.

[0018] Other features and advantages of the invention will be set forth in the description which follows, 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 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 An assembly diagram of a grate cooler module provided in an embodiment of this disclosure; Figure 2 A three-dimensional grate cooler provided in this disclosure embodiment Figure 1 ; Figure 3 A three-dimensional grate cooler provided in this disclosure embodiment Figure 2 ; Figure 4 A front view of a grate cooler provided in an embodiment of this disclosure; Figure 5 This is a perspective view of a grate provided in an embodiment of the present disclosure.

[0022] In the picture: 100. Rack; 200. First grate cooler module; 210. Drive beam; 220. Front plate; 221. Hinge hole; 230. Rear plate; 300. Second grate cooler module; 400. Drive mechanism; 500, grate plate; 510, sleeve plate; 520, first movable plate; 530, second movable plate; 540, through hole; 550, hinge shaft. 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] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed a drawback of existing technologies: the conveying power of traditional grate coolers primarily relies on the horizontal static friction between the grate and the bottom layer of clinker. During the conveying process, this friction is only effective on the thin layer of material in direct contact. For the thicker upper layer, the conveying effect diminishes sharply due to the slippage between particles within the material. This results in a limited volume of clinker that can be stably conveyed in a single stroke, easily reaching a bottleneck in the effective conveying capacity per unit grate area. This problem is particularly pronounced when processing clinker with poor flowability or uneven particle size, often manifesting as uneven material layer distribution, low conveying efficiency, and potentially affecting the uniformity of air permeability, thereby weakening the cooling effect.

[0029] Based on the above research, this disclosure provides a grate cooler. By designing the grate as a retractable structure and tilting it during operation, the traditional horizontal static friction pushing of the grate on the material is transformed into an oblique active push with an upward component force generated by the inclined surface. This more effectively overcomes the internal resistance of the material, improves the single push volume and overall conveying efficiency.

[0030] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0031] 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.

[0032] 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.

[0033] See Figure 2This disclosure provides a grate 500, including a sleeve plate 510, a first movable plate 520, and a second movable plate 530. The sleeve plate 510 forms the basic fixed frame of the grate 500, and its overall shape is a long groove, providing space for the movable plates on both sides to accommodate and guide. Multiple regularly distributed through holes 540 are formed on the body of the sleeve plate 510, which constitute the main channels for cooling airflow to pass through the grate 500, cool and penetrate the upper high-temperature material. The first movable plate 520 and the second movable plate 530 are respectively reciprocally movable on the left and right sides of the sleeve plate 510. Specifically, the first movable plate 520 and the second movable plate 530 can move smoothly in a straight line along their length direction within the internal slide of the sleeve plate 510, like a drawer, thereby achieving "extension" and "retraction" relative to the sleeve plate 510. Similarly, on the plates of the first movable plate 520 and the second movable plate 530, through holes 540 are also provided in a position and size that match the through holes 540 on the sleeve plate 510, so as to ensure that the airflow channel can maintain the necessary connectivity in any extension or retraction position.

[0034] See Figure 1 and Figure 2 In some embodiments, in order to achieve reliable linkage with the drive mechanism 400, a hinge shaft 550 is provided at the end of the first movable plate 520 and the second movable plate 530 away from the sleeve plate 510. The hinge shaft 550 is used to hinge with other components in the grate cooler module (such as the front plate 220 and the rear plate 230), thereby smoothly converting the external driving force into the linear extension and retraction motion of the movable plate.

[0035] See also Figure 1 The grate cooler module provided in this embodiment mainly includes: a drive beam 210, multiple parallel and spaced front plates 220 and rear plates 230, and the grate 500 described in the above embodiment. The drive beam 210 serves as the rigid frame and power transmission foundation of the entire module, and is typically a sturdy beam extending along the material conveying direction. The drive mechanism 400 directly acts on the drive beam 210, providing it with the power for reciprocating motion. Multiple front plates 220 and rear plates 230 are arranged in pairs and fixedly connected to the same side of the drive beam 210, essentially perpendicularly. They are arranged parallel and spaced apart, forming the main "fence" structure of the module. Specifically, each front plate 220 is provided with a hinge hole 221, which engages with the hinge shaft 550 of the first movable plate 520 on the grate 500; similarly, each rear plate 230 is also provided with a hinge hole 221, which engages with the hinge shaft 550 of the second movable plate 530. This hinged connection allows the movable plate to rotate flexibly within a certain angle while reliably transmitting linear driving force.

[0036] See also Figure 1 and Figure 3This embodiment uses the first grate cooler module 200 as an example for illustration. It mainly includes: a drive beam 210, multiple parallel and spaced front plates 220 and rear plates 230, and the grate 500 described in the previous embodiment. The drive beam 210 serves as the rigid frame and power input component of this module, extending along the material conveying direction. Multiple front plates 220 and rear plates 230 are paired and fixedly connected, substantially perpendicularly, to the same side of the drive beam 210. They are arranged parallel and spaced apart. Each front plate 220 and rear plate 230 has a hinge hole 221 for engaging with a hinge shaft 550 on the movable plate of the grate 500. The grate 500's sleeve plate 510 is fixedly installed on the side wall of the drive beam 210 of the adjacent second grate cooler module 300. Furthermore, the sleeve plate 510 is set to be inclined relative to the horizontal plane during installation. In a preferred embodiment, this tilt angle (i.e., the angle between the surface of the sleeve plate 510 and the horizontal plane) is designed to be between 15° and 45°. The first movable plate 520 of the grate 500 is hinged to a hinge hole 221 on a front plate 220 of the first grate cooler module 200 via a hinge shaft 550 at its end; similarly, the second movable plate 530 is hinged to a rear plate 230 of the first grate cooler module 200. Furthermore, the tilted grate 500 structure optimizes the cross-section of the material layer it supports (including a specific stone layer laid for uniform air distribution) in the conveying direction. Compared to a rectangular cross-section material layer formed on a conventional horizontal grate 500, the present invention uses a smaller material layer volume for the same layer thickness and conveying distance. This is beneficial for reducing the initial filling amount of auxiliary materials such as stones while ensuring cooling effect, thus reducing operating load and material costs.

[0037] See also Figure 1In some embodiments, through the unique cross-module connection described above, a dynamically deformable chamber formed by two grate cooler module components is created. Specifically, the chamber is enclosed by the following parts: the bottom of the chamber is formed by an inclined sleeve plate 510 fixed to the second grate cooler module 300, and a first movable plate 520 and a second movable plate 530 that can extend and retract relative to it; the side walls are formed by the front plate 220 and the rear plate 230 of the first grate cooler module 200; the drive beam 210 of the first grate cooler module 200 and the drive beam 210 of the second grate cooler module 300 finally enclose the chamber with the above structure. When the drive mechanism 400 drives the drive beam 210 of the first grate cooler module 200 to reciprocate, it drives the front plate 220 and the rear plate 230 on it to move together. Because the front and rear plates (220, 230) are hinged to the movable plates of the grate 500, the first movable plate 520 and the second movable plate 530 are pulled to make linear movements of extension or retraction within the fixed, inclined sleeve 510. This causes the volume and front-to-back length of the aforementioned chamber to change periodically, thereby realizing the gripping, pushing, and releasing of materials, completing efficient step-by-step conveying. Through the above ingenious design, the fixed support, inclined guide, and power drive are separated into adjacent modules. By combining the telescopic movement of the grate 500 with the leverage effect of the inclined bottom plate, the pushing force on the material is transformed from the traditional horizontal static friction force into an oblique pushing force with a vertical component, allowing the pushing force to act on a thicker material layer, thereby increasing the effective pushing amount of a single action.

[0038] See Figure 4 and Figure 5 This disclosure also provides a grate cooler, which achieves efficient, stable, and controllable material conveying and cooling by combining and coordinating multiple modular units. The grate cooler mainly includes: a frame 100, multiple grate cooler modules as described above, and a drive mechanism 400. The frame 100 serves as the supporting framework for the entire device, providing a stable installation foundation for all grate cooler modules and the drive mechanism 400. Multiple grate cooler modules are arranged side-by-side on the frame 100, and these modules (modules 200, 300) are arranged sequentially along the material conveying direction. The assembly relationship of each module is as described above: the sleeve plate 510 of the grate plate 500 of each grate cooler module is fixedly mounted on the side wall of the drive beam 210 of its adjacent module. This end-to-end, staggered fixing method allows the inclined grate plates 500 of all modules to be spliced ​​together into a continuous, dynamically variable inclined grate bed surface.

[0039] See Figure 4In some embodiments, the drive mechanism 400 may employ linear actuators such as cylinders, hydraulic cylinders, or electric push rods, and achieve independent control of the drive beams 210 of each module through mechanisms such as connecting rods and synchronous shafts. Its function is to drive the drive beams 210 to perform reciprocating linear motion along the frame 100. When the grate cooler is working, the drive mechanism 400 drives the drive beams 210 of the first grate cooler module 200 and the second grate cooler module 300 synchronously forward (e.g., towards...). Figure 3 (Left side) Movement. At this time, the first movable plate 520 and the second movable plate 530 of each module grate 500 extend outside the sleeve plate 510, and the extended movable plates together with the fixed inclined sleeve plate 510 form a forward-extending inclined working surface. After the push is completed, the drive beam 210 of the first grate cooler module 200, under the action of the drive mechanism 400, first moves backward (for example, to the left). Figure 3 (Right side) Movement reset. At this time, the movable plate of the grate 500 of the first grate cooler module 200 is pulled back into its sleeve plate 510. Since the sleeve plate 510 is inclined, the movable plate moves backward and upward along the incline when retracting, which can quickly reduce the contact area and friction with the material layer above, thus making the reset action less resistant, less energy-consuming, and with minimal interference to the already pushed material layer. Then, the drive beam 210 of the second grate cooler module 300 is also driven to move backward, and both modules return to their relative positions at the beginning of the cycle. This cycle repeats continuously, with multiple modules operating in sequence, to achieve efficient and stable continuous material conveying.

[0040] See Figure 3 In some embodiments, the grate cooler also includes a cooling air system, which typically includes components such as a fan, air ducts, and air chambers (or air distribution valves) (not shown in the figures). Its core workflow is as follows: Driven by the fan, the cooling airflow is fed from the lower part of the grate bed (usually located below the frame 100) into one or more independent air chambers. Each air chamber corresponds to the lower area of ​​one or a group of grate cooler modules. Subsequently, the cooling airflow flows upward, directly entering and filling the aforementioned inclined chamber tightly enclosed by the sleeve plate 510, the first movable plate 520, the second movable plate 530, the front plate 220, and the rear plate 230. Finally, under positive pressure, the airflow is forced through the through holes 540 opened on the sleeve plate 510 and the movable plate, cooling the thick layer of high-temperature material above it.

[0041] See Figure 1 and Figure 2In some embodiments, the distribution pattern of the through holes 540 on the first movable plate 520 and the second movable plate 530 is designed to perfectly match the distribution pattern of the through holes 540 on the sleeve plate 510. Specifically, when the first movable plate 520 and the second movable plate 530 reciprocate within the sleeve plate 510, and are in a fully extended, fully retracted, or intermediate position, the through holes 540 on the movable plates always maintain at least partial overlap with the through holes 540 on the sleeve plate 510 in the vertical projection, thereby physically forming a continuous and uninterrupted airflow path, thus achieving stable and continuous cooling airflow supply.

[0042] In summary, this grate cooler, by driving the retractable inclined grate plate 500, utilizes the lifting effect of the inclined surface on the material when it extends, transforming the pushing force on the material from the traditional horizontal static friction force into an inclined pushing force with a vertical component. This breaks the locking and static friction between material particles, allowing the pushing force to act on a thicker material layer, thereby increasing the effective pushing amount of a single action.

[0043] 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.

[0044] 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, are based on the orientation or positional relationships shown in the accompanying drawings and 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.

[0045] 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.

[0046] 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. A grate, characterized in that, include: Sleeve plate (510); The first movable plate (520) and the second movable plate (530) are respectively disposed on both sides of the sleeve plate (510); The first movable plate (520) and the second movable plate (530) are reciprocally movable within the sleeve (510) and can extend or retract relative to the sleeve (510).

2. The grate (500) as described in claim 1, characterized in that, The sleeve plate (510), the first movable plate (520), and the second movable plate (530) are each provided with several through holes (540).

3. The grate (500) as described in claim 1, characterized in that, The first movable plate (520) and the second movable plate (530) are both provided with hinge shafts (550) on the side away from the sleeve plate (510).

4. A grate cooler module, characterized in that, include: Drive beam (210); Multiple parallel, spaced-apart front plates (220) and rear plates (230), the front plates (220) and rear plates (230) being arranged in pairs and located on the same side of the drive beam (210); and, The grate (500) as described in any one of claims 1-3; The sleeve plate (510) of the grate plate (500) is adapted to be fixedly installed on the side wall of the drive beam (210) of an adjacent module and is inclined relative to the horizontal plane. The first movable plate (520) is hinged to a front plate (220) belonging to the same module, and the second movable plate (530) is hinged to a rear plate (230) belonging to the same module. The sleeve plate (510), the first movable plate (520), the second movable plate (530), and the front plate (220) and rear plate (230) connected to the drive beam (210) together form a chamber for conveying materials.

5. The grate cooler module as described in claim 4, characterized in that, The front plate (220) is provided with a hinge hole (221) that cooperates with the hinge shaft (550) of the first movable plate (520), and the rear plate (230) is provided with a hinge hole (221) that cooperates with the hinge shaft (550) of the second movable plate (530).

6. The grate cooler module as described in claim 4, characterized in that, When the sleeve plate (510) is fixedly installed on the side wall of the drive beam (210) of the adjacent module, the inclination angle between it and the horizontal plane is 15° to 45°.

7. A grate cooler, characterized in that, include: Rack (100); Multiple grate cooler modules as described in any one of claims 4-6, the multiple grate cooler modules are arranged side by side on the frame (100), and the sleeve plate (510) of the grate plate (500) of each grate cooler module is fixedly arranged on the side wall of the drive beam (210) of its adjacent module; A drive mechanism (400) is connected to the drive beam (210) and is used to drive the drive beam (210) to move, thereby causing the first movable plate (520) and / or the second movable plate (530) to extend or retract.

8. The grate cooler as described in claim 7, characterized in that, The drive mechanism (400) is a cylinder, a hydraulic cylinder, or an electric push rod.

9. The grate cooler as described in claim 7, characterized in that, After the first movable plate (520) and / or the second movable plate (530) are extended or retracted, the through holes (540) on them correspond to the through holes (540) on the sleeve plate (510) to maintain the connection of the airflow channel.

10. The grate cooler as described in claim 7, characterized in that, It also includes a cooling air system for providing cooling airflow to the chamber formed by the sleeve plate (510), the first movable plate (520), the second movable plate (530), the front plate (220), and the rear plate (230).

Images