Plate filter quick-release fixing device and sludge drying equipment

Abstract

The application discloses a quick-release fixing device of a plate filter and a sludge drying equipment. The fixing device comprises a base, a first filter, a frame, a second filter and a fixing frame. The first filter is installed on the base. One side of the frame is rotationally connected with the base, and the frame is pressed on the top surface of the first filter. The second filter is installed on the frame. One side of the fixing frame is rotationally connected with the frame, and the fixing frame is pressed on the top surface of the second filter. The other side of the fixing frame is detachably connected with the base through a locking assembly. The quick-release fixing device of the plate filter realizes the quick release and installation of the two filters through the double-rotation connecting mode, and is convenient and stable.

Description

Technical Field

[0001] This application relates to the technical field of sludge drying equipment, and more particularly to a quick-release fixing device for a plate filter and sludge drying equipment. Background Technology In the field of sludge treatment, sludge drying equipment is one of the key pieces of equipment. Its function is to remove moisture from the sludge through heating and other methods, thereby reducing and stabilizing the sludge volume for subsequent transportation, storage, and resource utilization. However, sludge drying equipment generates a large amount of dust during operation. If this dust is discharged directly without effective treatment, it will not only cause serious pollution to the surrounding environment, affecting air quality and endangering the health of operators, but may also cause wear and tear on the equipment itself, reducing its service life and operational stability.

[0002] To address the aforementioned dust problem, existing sludge drying equipment is typically equipped with filtration devices to filter and intercept the generated dust, meeting environmental protection requirements and ensuring normal equipment operation. To improve filtration efficiency, most filtration devices on the market currently employ a two-stage filtration system. This two-stage filtration structure, through a combination of filter media with different filtration precision and functions, can effectively intercept dust particles of varying sizes, significantly improving the filtration efficiency and quality for dust generated during the sludge drying process and reducing dust emissions. While existing two-stage filtration devices meet the dust filtration needs of sludge drying equipment to a certain extent, their installation design often employs a pull-out installation method. This method offers some convenience during initial installation or short-term disassembly and reassembly. However, due to the harsh operating environment of sludge drying equipment, the filters are constantly exposed to a dusty atmosphere that may also be humid and corrosive. Under such working conditions, after frequent pull-out and disassembly operations, the mating components between the filter and the mounting frame are prone to wear and deformation.

[0003] Specifically, when replacing filter media or disassembling the filter for maintenance, jamming or difficulty in pulling it out often occurs. Jamming prevents the filter from being smoothly pulled out or installed, requiring operators to spend considerable time and effort on adjustments and troubleshooting, severely impacting maintenance progress and work efficiency. Furthermore, forcibly pulling it out may cause further damage to the filter itself and the mounting frame, increasing equipment maintenance costs and operational risks. Utility Model Content

[0004] The purpose of this application is to provide a quick-release fixing device for a plate filter and a sludge drying device, which can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On one hand, a quick-release fixing device for a plate filter is provided, comprising: a base, a first filter element, a frame, a second filter element, and a fixing bracket. The first filter element is installed on the base, one side of the frame is rotatably connected to the base and the frame presses against the top surface of the first filter element, the second filter element is installed on the frame, one side of the fixing bracket is rotatably connected to the frame and the fixing bracket presses against the top surface of the second filter element, and the other side of the fixing bracket is detachably connected to the base via a locking assembly.

[0006] Furthermore, the bottom of the frame extends inward to form a folded edge, and a mounting position for embedding the second filter element is formed between the folded edge and the inner sidewall of the frame.

[0007] Furthermore, a limiting member is provided on the side of the frame away from the locking component, and a limiting boss is provided on the base to cooperate with the limiting member for limiting.

[0008] Furthermore, the frame extends upward on the side opposite to the locking assembly, forming a protrusion, and the fixing bracket is rotatably connected to the top surface of the protrusion via a connector.

[0009] Furthermore, the frame is also rotatably connected to the base via a connector.

[0010] Furthermore, the connector is a hinge.

[0011] Furthermore, a seal is provided between the first filter element and the frame; and / or a seal is provided between the second filter element and the frame.

[0012] Furthermore, the fixing frame has a locking groove that extends vertically through it. The locking component is rotatably mounted on the base, and the locking component can move repeatedly between the locked position and the unlocked position. When the locking component is in the locked position, the locking component is at least partially locked in the locking groove; when the locking component is in the unlocked position, the locking component disengages from the locking groove.

[0013] Furthermore, the locking assembly includes a support mounted on the base, a movable rod hinged to the support, and a locking member movably disposed on the movable rod. The movable rod is movable relative to the support between the locked position and the unlocked position. In the locked position, the movable rod is located within the locking groove and at least partially above the fixed frame. The locking member is movable relative to the movable rod in a vertical direction, thereby contacting and locking the fixed frame with the upper surface of the fixed frame. In the unlocked position, the movable rod disengages from the locking groove.

[0014] On the other hand, a sludge drying device is also provided, including a quick-release fixing device for a plate filter as described above.

[0015] The beneficial effects of this application are as follows: When the first filter element needs to be replaced, after unlocking the locking assembly, the operator only needs to lift the frame, which will then lift the second filter element and the fixing frame together, thus quickly exposing the first filter element. No tedious adjustments or handling are required, greatly saving time and effort in disassembling the first filter element. Similarly, when replacing the second filter element, simply unlocking the locking assembly and lifting the fixing frame allows for a quick replacement. This convenient disassembly and assembly method greatly improves maintenance efficiency, reduces equipment downtime due to maintenance, and ensures the continuous and stable operation of the sludge drying equipment.

[0016] Furthermore, by avoiding further damage to the structural strength and filter caused by forced pulling, the wear and tear on the equipment and the frequency of replacing parts are reduced, thus saving a significant amount of maintenance costs. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the quick-release fixing device for the plate filter described in the embodiments of this application. Figure 1 ; Figure 2 This is a schematic diagram of the quick-release fixing device for the plate filter described in the embodiments of this application. Figure 2 ; Figure 3 This is an exploded view of the quick-release fixing device for the plate filter described in the embodiments of this application; Figure 4 This is a schematic diagram of the framework described in the embodiments of this application; Figure 5 This is a schematic diagram of the base described in an embodiment of this application; Figure 6 This is a schematic diagram of the locking component described in an embodiment of this application.

[0019] In the diagram: 1. Base; 101. Limiting boss; 2. First filter element; 3. Frame; 301. Folded edge; 302. Protrusion; 303. Limiting element; 4. Second filter element; 5. Fixing frame; 6. Locking assembly; 601. Support; 602. Movable rod; 603. Locking element; 7. Connecting element; 8. Sealing element. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1-6 As shown, this embodiment provides a quick-release fixing device for a plate filter, including: a base 1, a first filter element 2, a frame 3, a second filter element 4, and a fixing bracket 5. The first filter element 2 is installed on the base 1. One side of the frame 3 is rotatably connected to the base 1, and the frame 3 presses against the top surface of the first filter element 2. The second filter element 4 is installed on the frame 3. One side of the fixing bracket 5 is rotatably connected to the frame 3, and the fixing bracket 5 presses against the top surface of the second filter element 4. The other side of the fixing bracket 5 is also detachably connected to the base 1 through a locking assembly 6.

[0024] Based on the above scheme, when the first filter element 2 needs to be replaced, since the fixing frame 5 is connected to the base 1 via the locking assembly 6, to ensure that the frame 3 can be lifted smoothly, the locking assembly 6 must first be unlocked to disengage the fixing frame 5 from the base 1. Then, because the frame 3 is rotatably connected to the base 1, lifting the frame 3 will cause it to rotate around the point of connection with the base 1. Simultaneously, since the second filter element 4 is mounted on the frame 3, and the fixing frame 5 is rotatably connected to the frame 3, lifting the frame 3 will lift the second filter element 4 and the fixing frame 5 together, thus exposing the first filter element 2 mounted on the base 1. The operator can then easily disassemble and replace the first filter element 2. When the second filter element 4 needs to be replaced, the locking assembly 6 is also unlocked first to separate the fixing frame 5 from the base 1. Since the fixing frame 5 is rotatably connected to the frame 3, the fixing frame 5 can be lifted. Once lifted, the fixing frame 5 no longer presses against the second filter element 4, allowing the operator to quickly replace it.

[0025] The quick-release fixing device for the plate filter described in this application features an innovative design that combines rotating and detachable connections. It cleverly integrates the base 1, the first filter element 2, the frame 3, the second filter element 4, and the fixing bracket 5, resulting in a compact and rational overall structure. This design overcomes the limitations of traditional pull-out installation methods, which are prone to jamming and difficulty in smooth pulling after long-term use, fundamentally solving the problem of difficult filter installation and removal in existing technologies.

[0026] Furthermore, the bottom of the frame 3 extends inward to form a folded edge 301, and the folded edge 301 forms a mounting position for the second filter element 4 to be inserted between itself and the inner sidewall of the frame 3. From the perspective of ease of installation, this clearly defined mounting position provides precise guidance and positioning for the installation of the second filter element 4. Operators do not need to spend a lot of time and effort adjusting the position of the second filter element 4; they can simply insert it into the mounting position to complete the initial installation, greatly improving installation efficiency and reducing possible errors and mistakes during the installation process.

[0027] In terms of stability, the mounting position effectively limits the second filter element 4 from the bottom and sides, and combined with the top pressure of the fixing frame 5, forms a multi-directional stable fixing structure. This allows the second filter element 4 to remain stable during operation, even when subjected to external forces such as airflow impact and equipment vibration, avoiding problems such as reduced filtration effect and equipment failure caused by filter element shaking or displacement, effectively ensuring the normal operation and filtration quality of the filtration device.

[0028] Furthermore, a limiting member 303 is provided on the side of the frame 3 facing away from the locking assembly 6, and a limiting boss 101 is provided on the base 1 to cooperate with the limiting member 303 for limiting. When the frame 3 is rotated to remove the first filter element 2, the frame 3 will rotate around the rotation connection point with the base 1. As the frame 3 rotates, the limiting member 303 also moves accordingly. When the frame 3 rotates to the angle that is just right for removing the first filter element 2, the limiting member 303 contacts the limiting boss 101 on the base 1. Since the limiting boss 101 has a fixed blocking structure, it will prevent the limiting member 303 from moving further, thereby limiting the further rotation of the frame 3. This ensures that the frame 3 will not rotate too little, resulting in insufficient exposure of the first filter element 2 and difficulty in removal; nor will it rotate too much, avoiding collisions and interference with other surrounding components due to excessive rotation of the frame 3, or unreasonable occupation of operating space.

[0029] Meanwhile, the frame 3 extends upward from the side opposite to the locking assembly 6, forming a protrusion 302. The fixing bracket 5 is rotatably connected to the top surface of the protrusion 302 via a connector 7. Since the second filter element 4 has a certain thickness, directly rotatably connecting the fixing bracket 5 and the frame 3 at the height of the second filter element 4 would result in limited connection space, inconvenient operation, and unstable connection structure. However, by extending upward from the side opposite to the locking assembly 6 to form the protrusion 302, this protrusion 302 alters the local spatial structure of the frame 3, increasing its height in the vertical direction. When rotatably connecting the fixing bracket 5 and the frame 3, the connector 7 can be installed between the top surface of the protrusion 302 and the fixing bracket 5, cleverly avoiding the interference of the thickness of the second filter element 4 by utilizing the additional height space provided by the protrusion 302. This allows the fixing frame 5 to achieve a stable and flexible rotational connection with the frame 3 through the connector 7 within the reasonable space constructed by the protrusion 302, ensuring that the fixing frame 5 can rotate normally around the connection point, so as to realize subsequent operations such as pressing and fixing or lifting and replacing the second filter element 4.

[0030] Furthermore, the frame 3 is also rotatably connected to the base 1 via the connector 7. When it is necessary to operate the filter elements in the filtration device, such as replacing the first filter element 2 or the second filter element 4, since the frame 3 and the base 1 are only rotatably connected by the connector 7 rather than rigidly fixed, the operator can apply a certain external force to make the frame 3 rotate around the rotation axis determined by the connector 7. This rotation allows the frame 3 to change its position and angle relative to the base 1, thereby creating the necessary space and convenient conditions for operations such as removing, installing, or maintaining the filter elements.

[0031] Specifically, the connecting component 7 is a hinge. The hinge consists of two metal blades and a central pivot pin, which connects corresponding parts of two connecting components (such as frame 3 and base 1, or fixing frame 5 and frame 3). During device operation, when it is necessary to rotate frame 3 to remove the filter element, or to rotate fixing frame 5 to press or release the second filter element 4, the components connected to both ends of the pivot pin can rotate around the pivot pin. For example, under the connection of the hinge, frame 3 can rotate freely relative to base 1 within a certain angle range, changing the position and angle of frame 3, providing operating space for the installation and removal of the first filter element 2; fixing frame 5 can also rotate around the pivot under the connection of the hinge, completing the fixing and releasing action of the second filter element 4.

[0032] Generally, a sealing element 8 is provided between the first filter element 2 and the frame 3; and / or a sealing element 8 is provided between the second filter element 4 and the frame 3. In the operation of the quick-release fixing device for the plate filter, the dust-laden airflow first enters the device, and the first filter element 2, acting as a primary filter, begins its dust filtration work. At this time, the sealing element 8 installed between the first filter element 2 and the frame 3 plays a crucial role. The sealing element 8 possesses flexibility and elasticity. When the frame 3 securely fixes the first filter element 2 in a predetermined position, the sealing element 8 deforms at the contact surface due to the compressive force applied by the frame 3. This deformation allows the sealing element 8 to tightly and continuously fill all the tiny gaps between the first filter element 2 and the frame 3, constructing a tight sealing barrier. In this way, the dust-laden airflow cannot bypass the first filter element 2 through these gaps, ensuring that all dust-laden airflow entering the device must undergo primary filtration by the first filter element 2, intercepting larger dust particles and achieving initial dust separation.

[0033] Although the airflow after primary filtration by the first filter element 2 has removed most of the larger dust particles, it may still contain some smaller dust particles. At this point, the second filter element 4, acting as an intermediate filter, takes on the task of further filtering the dust. When the frame 3 installs the second filter element 4 in place and applies appropriate pressure, the seal 8 located between the second filter element 4 and the frame 3 will also deform due to the pressure. The seal 8 fits tightly against the contact surface between the second filter element 4 and the frame 3, precisely filling any gaps that may exist. This prevents the airflow that has undergone primary filtration from leaking out through the gap between the second filter element 4 and the frame 3 before entering the second filter element 4 for deep filtration. This ensures that the airflow can pass through the second filter element 4 completely according to the designed path, effectively intercepting the remaining smaller dust particles in the airflow and achieving a finer filtration effect.

[0034] In some embodiments, the fixing frame 5 has a through-hole locking groove, and the locking component 6 is rotatably mounted on the base 1. The locking component 6 can move repeatedly between a locked position and an unlocked position. When the locking component 6 is in the locked position, it is at least partially locked in the locking groove; when it is in the unlocked position, it disengages from the locking groove. When it is necessary to securely fix the fixing frame 5 to the base 1 to ensure that the second filter element 4 maintains a stable working state during filtration, the operator rotates the locking component 6 to the locked position. Since the locking component 6 is rotatably mounted on the base 1, during rotation, it gradually approaches the through-hole locking groove on the fixing frame 5. When it reaches the locked position, at least a portion of the locking component 6 is precisely embedded in the locking groove. At this time, the locking component 6 and the locking groove cooperate to form a mechanical constraint relationship. This constraint restricts the movement of the mounting bracket 5 in multiple directions, including vertical movement and horizontal swaying, thereby firmly locking the mounting bracket 5 onto the base 1. This allows the second filter element 4 installed on the mounting bracket 5 to stably perform its intermediate dust filtration function, ensuring the normal operation and filtration effect of the filtration device.

[0035] When the second filter element 4 needs to be replaced, repaired, or cleaned, and the mounting bracket 5 needs to be moved, the operator rotates the locking assembly 6 to the unlocked position. During rotation, the locking assembly 6 gradually moves away from the locking groove and eventually completely disengages. At this point, the mechanical constraint of the locking assembly 6 between the mounting bracket 5 and the base 1 is removed, and the mounting bracket 5 can rotate relative to the base 1 under the action of the hinge or other connecting parts 7, providing the operator with sufficient operating space to facilitate their operations on the second filter element 4. After the operation is completed, the mounting bracket 5 is rotated back to the appropriate position, and the locking assembly 6 is rotated back to the locked position to re-secure the mounting bracket 5.

[0036] It is worth mentioning that when the first filter element 2 needs to be replaced, the locking component 6 also needs to be unlocked in order to enable the frame 3, along with the second filter element 4 and the fixing frame 5, to rotate synchronously.

[0037] Preferably, the locking assembly 6 includes a support 601 mounted on the base 1, a movable rod 602 hinged to the support 601, and a locking member 603 movably disposed on the movable rod 602. The movable rod 602 is movable relative to the support 601 between the locked position and the unlocked position. When in the locked position, the movable rod 602 is located in the locking groove and at least partially above the fixing frame 5. The locking member 603 is movable relative to the movable rod 602 in a vertical direction, thereby contacting and locking the fixing frame 5 with the upper surface of the fixing frame 5. When in the unlocked position, the movable rod 602 disengages from the locking groove.

[0038] In this design, the locking assembly 6 employs a combination of a movable rod 602 and a locking element 603. In the locked position, the movable rod 602 is located within the locking groove, limiting the horizontal movement of the fixed frame 5 and preventing it from moving horizontally. Simultaneously, the locking element 603 moves downwards to contact the upper surface of the fixed frame 5, applying a locking force vertically to prevent it from moving up or down. This dual locking mechanism ensures a more stable and reliable fixation of the fixed frame 5, enabling it to withstand various complex forces generated during the filtration process. This ensures that the second filter element 4 remains in a stable working state, effectively improving the overall performance and filtration efficiency of the filtration device and guaranteeing the smooth operation of the sludge drying process.

[0039] The rotating design of the movable rod 602 relative to the support 601 and the vertically moving design of the locking element 603 relative to the movable rod 602 make locking and unlocking operations very flexible and convenient. Operators can easily lock and release the fixed frame 5 with simple rotation and movement, without the need for complex tools or cumbersome disassembly steps. This convenient operation method greatly shortens equipment maintenance and repair time, improves work efficiency, and is especially suitable for applications requiring frequent replacement or maintenance of the second filter element 4, reducing equipment downtime and lowering production costs.

[0040] The locking assembly 6 consists of three main components: a support 601, a movable rod 602, and a locking element 603, resulting in a relatively simple structure. This simple structure not only reduces the difficulty and cost of manufacturing but also decreases the probability of malfunctions. The support 601, movable rod 602, and locking element 603 are typically made of high-strength, wear-resistant materials, enabling them to withstand frequent rotation and movement during long-term use without easily becoming damaged. Furthermore, the connection methods between the components are carefully designed to ensure the robustness and stability of the connections, further improving the durability and reliability of the locking assembly 6 and reducing equipment maintenance costs and total costs over its service life.

[0041] The locking assembly 6 is designed with versatility and adaptability. The shape, size, and material of the support 601, movable rod 602, and locking element 603 can be flexibly adjusted according to different equipment specifications and usage requirements to accommodate different sizes of mounting frames 5 and bases 1. Furthermore, this locking method can also be applied to other similar mechanical structures requiring fixing and unlocking, demonstrating strong scalability and compatibility. Whether in small, manually operated equipment or large automated production lines, it provides excellent fixing and unlocking functions, offering more choices and flexibility for equipment design and manufacturing.

[0042] On the other hand, a sludge drying device is also provided, including a quick-release fixing device for a plate filter as described above.

[0043] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A quick-release fixing device for a plate filter, characterized in that, include: The base (1), the first filter element (2), the frame (3), the second filter element (4), and the fixing bracket (5) are provided. The first filter element (2) is installed on the base (1). One side of the frame (3) is rotatably connected to the base (1) and the frame (3) presses against the top surface of the first filter element (2). The second filter element (4) is installed on the frame (3). One side of the fixing bracket (5) is rotatably connected to the frame (3) and the fixing bracket (5) presses against the top surface of the second filter element (4). The other side of the fixing bracket (5) is detachably connected to the base (1) through a locking assembly (6).

2. The quick-release fixing device for the plate filter according to claim 1, characterized in that, The bottom of the frame (3) extends inward to form a folded edge (301), and the folded edge (301) and the inner sidewall of the frame (3) form a mounting position for the second filter element (4) to be embedded.

3. The quick-release fixing device for a plate filter according to claim 1, characterized in that, The frame (3) is provided with a limiting member (303) on the side away from the locking component (6), and the base (1) is provided with a limiting boss (101) that cooperates with the limiting member (303) for limiting.

4. The quick-release fixing device for a plate filter according to claim 1, characterized in that, The frame (3) extends upward on the side away from the locking assembly (6) to form a protrusion (302), and the fixing frame (5) is rotatably connected to the top surface of the protrusion (302) via a connector (7).

5. The quick-release fixing device for a plate filter according to claim 4, characterized in that, The frame (3) is also rotatably connected to the base (1) via a connector (7).

6. The quick-release fixing device for a plate filter according to claim 5, characterized in that, The connector (7) is a hinge.

7. The quick-release fixing device for a plate filter according to any one of claims 1-6, characterized in that, A seal (8) is provided between the first filter element (2) and the frame (3); and / or a seal (8) is provided between the second filter element (4) and the frame (3).

8. The quick-release fixing device for a plate filter according to any one of claims 1-6, characterized in that, The fixing frame (5) has a locking groove that runs vertically through it. The locking component (6) is rotatably mounted on the base (1). The locking component (6) can move repeatedly between the locked position and the unlocked position. When the locking component (6) is in the locked position, the locking component (6) is at least partially locked in the locking groove. When the locking component (6) is in the unlocked position, the locking component (6) disengages from the locking groove.

9. The quick-release fixing device for a plate filter according to claim 8, characterized in that, The locking assembly (6) includes a support (601) mounted on the base (1), a movable rod (602) hinged to the support (601), and a locking member (603) movably disposed on the movable rod (602). The movable rod (602) is movable relative to the support (601) between the locked position and the unlocked position. When in the locked position, the movable rod (602) is located in the locking groove and at least partially above the fixing frame (5). The locking member (603) is movable relative to the movable rod (602) in the vertical direction, thereby contacting and locking the fixing frame (5) with the upper surface of the fixing frame (5). When in the unlocked position, the movable rod (602) disengages from the locking groove.

10. A sludge drying device, characterized in that, Includes the quick-release fixing device for plate filters as described in any one of claims 1-9.

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