Fireproof brake with filter screen convenient to disassemble and replace

Abstract

The utility model relates to the technical field of fireproof brakes, in particular to a fireproof brake with a filter screen convenient to disassemble and replace. A fire damper with a filter screen convenient to disassemble and replace comprises a fire damper body, a filter screen assembly, a plurality of cooperative connecting rods and a mounting groove, the fire damper body comprises an outer frame and a rotary closing assembly arranged in the outer frame, and the filter screen assembly comprises two closed filter screen frames rotationally connected with the outer frame; and the cooperative connecting rod is connected between the rotary closing assembly and the closed filter screen frame at intervals. The cooperative connecting rod is arranged on the rotary sealing plate driven by the executing mechanism, the filter screen assembly is driven by the cooperative connecting rod to rotate synchronously, and therefore the ventilation function of the fire damper is achieved, the filter screen assembly is prevented from blocking air from entering under the condition that ventilation is needed, and the installation groove and the closing plate are arranged on the side edge of the outer frame. A worker can pull out the filter screen assembly from the outer frame and replace the filter screen assembly with a new filter screen assembly by screwing off the bolt, opening the cover and screwing off the rotating button on the cooperative connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of fireproof gate technology, and in particular to a fireproof gate with an easy-to-replace filter screen. Background Technology

[0002] Fire dampers are installed on the supply and return air ducts of ventilation and air conditioning systems. They are normally open. In the event of a fire, when the gas temperature inside the duct reaches 70°C, the fusible link melts and the valve automatically closes under the force of the torsion spring. They can meet the requirements of fire resistance stability and fire resistance integrity for a certain period of time and serve as a smoke and fire barrier.

[0003] In existing fire dampers, a filter screen is often added at the rear to filter smoke and dust, thereby filtering harmful gases in the fire. However, when the fire damper is in the normal open state, the filter screen is also in a blocking state, which hinders the normal passage of airflow. Moreover, the filter screen is often set inside the fire damper, making it difficult to replace with a new one. Utility Model Content

[0004] Other features and advantages of this 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 this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a fireproof shutter with an easy-to-replace filter screen. A cooperating linkage is set on the rotating sealing plate driven by the actuator. The cooperating linkage drives the filter screen assembly to rotate synchronously, thereby realizing the ventilation function of the fireproof shutter and preventing the filter screen assembly from blocking air from entering when ventilation is needed. When a fire occurs, the actuator drives the rotating sealing plate to close, and the filter screen assembly also closes synchronously to achieve the function of filtering smoke. The outer frame has a mounting groove and a closing plate on the side. The operator can unscrew the bolts on the closing plate, open the cover and unscrew the rotating knob on the cooperating linkage to pull out the filter screen assembly from the outer frame and replace it with a new filter screen assembly.

[0006] This utility model provides a fireproof shutter with an easy-to-replace filter screen, including a fireproof shutter body, a filter screen assembly, several cooperating connecting rods and a mounting groove. The fireproof shutter body includes an outer frame and a rotating closing assembly disposed within the outer frame. The filter screen assembly is disposed within the outer frame and located behind the rotating closing assembly. The filter screen assembly includes two closed filter screen frames rotatably connected to the outer frame. The cooperating connecting rods are spaced apart between the rotating closing assembly and the closed filter screen frames. The mounting groove is opened on the outer frame and corresponds to the position of the filter screen assembly.

[0007] The closed filter frame contains a filter screen, and two movable slots are symmetrically arranged on the top of the closed filter frame. The rotating closing assembly includes two rotating sealing plates, and the top of the rotating sealing plates is also correspondingly provided with two movable slots. One end of the cooperating link is rotatably connected to the movable slot on the rotating sealing plate, and the other end of the cooperating link is rotatably connected to the movable slot in the closed filter frame.

[0008] The protective gate body, consisting of an outer frame and a rotating closing assembly, constitutes the basic structure of the fireproof gate. A filter assembly located behind this rotating closing assembly filters smoke during a fire. Two closed filter frames and two rotating sealing plates are correspondingly provided. Each set of closed filter frames and rotating sealing plates is connected at the top by two cooperating connecting rods, ensuring that the closed filter frame rotates synchronously when the rotating sealing plate rotates. When the rotating sealing plate opens for ventilation, it ensures the unobstructed flow of air through the entire fireproof gate passage. A downwardly recessed movable groove prevents the cooperating connecting rods located within the groove from contacting the inner wall of the outer frame, allowing for smooth rotation. The mounting groove on the outer frame corresponds to the position of the filter assembly, allowing for easy replacement of the filter assembly.

[0009] In some embodiments, the movable slot has an opening, which is opposite to the opening of the closed filter frame. The opening has an opening angle greater than 120 degrees. The cooperating link is rotatably connected to the movable slot via a rotary knob. The oppositely positioned opening is used to accommodate the cooperating link. The opening angle is greater than 120 degrees to allow the cooperating link to rotate smoothly. The larger the opening angle, the larger the range of rotation of the rotating sealing plate, thereby expanding the airflow range and increasing the overall air permeability of the fire damper. The cooperating link is rotatably connected to the movable slot via a rotary knob, which is detachable.

[0010] In some embodiments, a raised base is provided on the inner wall of the outer frame, and two rotating bearings are provided on the raised base. A rotating shaft is longitudinally arranged in the middle of the closed filter frame, and the bottom end of the rotating shaft is inserted into the rotating bearing. The raised base is used to house the rotating bearing. To ensure smooth rotation of the closed filter frame, a rotating bearing that improves smoothness is added to cooperate with the rotating shaft. During installation, the bottom of the rotating shaft is directly aligned and inserted into the rotating bearing to complete the installation. Correspondingly, when replacing the closed filter frame, the rotating shaft is pulled upwards to disengage the connection.

[0011] In some embodiments, the top of the rotating shaft extends upward, and a replacement plate is connected between the two rotating shafts at the top. The replacement plate has an arc-shaped notch, the position of which corresponds to the position of the rotating knob on the cooperating link. The replacement plate between the two rotating shafts provides a fulcrum for replacing the filter assembly, and the notch is provided to reserve space. Below the replacement plate are two cooperating links. To facilitate the easy removal and installation of the rotating knob on the cooperating link, the notch is provided for easy removal. When replacing the closed filter frame, the filter assembly can be lifted or placed through the replacement plate. Preferably, the height of the top of the rotating shaft corresponds to the height of the fixed panel.

[0012] In some embodiments, the mounting groove is U-shaped and has a fixing panel horizontally arranged inside. The height of the fixing panel is lower than the height of the outer frame. An inner frame is formed on the bottom side of the U-shaped mounting groove, and the outer frame communicates with the outside through the inner frame. To make the entire outer frame flat, a downwardly recessed fixing panel is provided to accommodate the closing plate and fix its position. The inner frame is provided for workers to pull out the filter assembly.

[0013] In some embodiments, a closing plate is rotatably connected to the bottom side of the inner frame. The closing plate is convex in shape and adapted to the size of the mounting groove. Several fixing screw holes are spaced apart on the fixing panel, and fixing bolts are correspondingly screwed onto the closing plate, with the fixing bolts screwed into the fixing screw holes. The closing plate and the fixing panel are fixed together by fixing bolts to ensure the airtightness of the entire fire damper. The rotatable closing plate can be repeatedly opened and closed.

[0014] In some embodiments, the closed plate extends with two limiting holes, the positions of which correspond to the positions of the rotating shaft. The limiting holes are fitted around the rotating shaft, and each limiting hole also has a limiting groove. The limiting grooves on the two limiting holes are arranged opposite to each other, and the replacement plate is engaged within the limiting groove. The limiting holes cooperate with the bottom rotating bearing to fix the position of the rotating shaft, ensuring the central axis remains stable during the rotation of the closed filter frame. The notches are designed to accommodate the replacement plate.

[0015] In some embodiments, the height of the inner frame is greater than the thickness of the closed filter frame. During the replacement process, the operator unscrews the bolts on the closed plate, opens the closed plate, removes the corresponding knobs, disengages the connecting rod from the closed filter frame, moves the filter assembly backward using the replacement plate, disengages the end of the connecting rod from the movable slot, pulls the filter assembly out of the inner frame, replaces it with a new filter assembly, inserts it into the inner frame, places the end of the connecting rod into the movable slot, secures the knob, and screws the closed plate in place, thus completing the replacement process.

[0016] In some embodiments, the rotary closing assembly further includes an actuator disposed outside the outer frame and in front of the mounting groove. The actuator is electrically connected to the rotary sealing plate and is used to drive the rotary sealing plate to rotate. The actuator is used to receive relevant temperature data, determine whether a fire has occurred, and drive the motor to rotate the rotary sealing plate. The specific structure of the rotary closing assembly is a common structure of fire dampers in the prior art, and can be referred to the prior art for details, which will not be elaborated here.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are:

[0018] This invention features a coordinating linkage on a rotating sealing plate driven by an actuator. This linkage drives the filter assembly to rotate synchronously, thereby enabling the fire damper to breathe and preventing the filter assembly from blocking airflow when ventilation is needed. In the event of a fire, the actuator drives the rotating sealing plate to close, and the filter assembly closes simultaneously, thus filtering smoke. The outer frame has a mounting groove and a closing plate on its side. By unscrewing the bolts on the closing plate, opening the cover, and unscrewing the rotating knob on the coordinating linkage, the operator can remove the filter assembly from the outer frame and replace it with a new one.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0020] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0021] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the protective gate in some embodiments of this utility model;

[0026] Figure 2 This is a schematic diagram showing the connection between the rotating closing assembly and the closed filter screen via a cooperating linkage in some embodiments of this utility model;

[0027] Figure 3 This is a schematic diagram showing the installation groove and filter screen assembly in some embodiments of this utility model.

[0028] 1. Fire damper body;

[0029] 11. Outer frame;

[0030] 12. Rotate the closing assembly;

[0031] 121. Rotating sealing plate; 122. Actuator;

[0032] 2. Filter assembly;

[0033] 21. Close the filter frame; 22. Filter screen; 23. Raise the base; 24. Rotate the bearing; 25. Rotate the shaft; 26. Replace the plate;

[0034] 3. Coordinating linkage;

[0035] 4. Mounting slot;

[0036] 5. Movable slot;

[0037] 6. Turn the knob;

[0038] 7. Fix the panel;

[0039] 8. Inner frame;

[0040] 9. Closure plate;

[0041] 91. Limiting hole; 92. Limiting groove. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0043] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; 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. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Reference Figure 1 , Figure 1 This is a schematic diagram of the overall structure of the protective gate in some embodiments of this utility model.

[0047] According to some embodiments of the present invention, the present invention provides a fireproof gate with a filter screen 22 that is easy to replace, including a fireproof gate body 1, a filter screen assembly 2, several cooperating connecting rods 3 and a mounting groove 4. The fireproof gate body 1 includes an outer frame 11 and a rotating closing assembly 12 disposed in the outer frame 11. The filter screen assembly 2 is disposed in the outer frame 11 and located behind the rotating closing assembly 12. The filter screen assembly 2 includes two closed filter screen frames 21 that are rotatably connected to the outer frame 11. The cooperating connecting rods 3 are spaced apart between the rotating closing assembly 12 and the closed filter screen frames 21. The mounting groove 4 is opened on the outer frame 11 and corresponds to the position of the filter screen assembly 2.

[0048] The closed filter frame 21 contains a filter screen 22. The top of the closed filter frame 21 has two symmetrically arranged movable slots 5. The rotating closing assembly 12 includes two rotating sealing plates 121. The top of the rotating sealing plates 121 also has two corresponding movable slots 5. One end of the cooperating link 3 is rotatably connected to the movable slot 5 on the rotating sealing plate 121, and the other end of the cooperating link 3 is rotatably connected to the movable slot 5 of the closed filter frame 21.

[0049] The protective gate body, consisting of an outer frame 11 and a rotating closing assembly 12, constitutes the basic structure of the fireproof gate. The filter assembly 2, located behind the rotating closing assembly 12, is used to filter smoke during a fire. There are two closed filter frames 21 and two rotating sealing plates 121. Each set of closed filter frames 21 and rotating sealing plates 121 is rotatably connected at the top by two cooperating connecting rods 3, which ensures that when the rotating sealing plate 121 rotates, the closed filter frame 21 can rotate synchronously. When the rotating sealing plate 121 opens for ventilation, it ensures the unobstructed flow of the entire fireproof gate passage, allowing airflow to pass through. The downwardly recessed movable groove 5 prevents the cooperating connecting rods 3 located in the movable groove 5 from contacting the inner wall of the outer frame 11, thus allowing for smooth rotation. The mounting groove 4 on the outer frame 11 corresponds to the position of the filter assembly 2, which is used to replace the filter assembly 2 at any time.

[0050] Reference Figure 2 , Figure 2 This is a schematic diagram showing the connection between the rotating closing assembly and the closed filter screen via a cooperating linkage in some embodiments of this utility model.

[0051] According to some embodiments of this utility model, optionally, the movable groove 5 is provided with an opening, and the opening on the rotating sealing plate 121 is opposite to the opening of the closed filter frame 21. The opening has an opening angle greater than 120 degrees, and the cooperating link 3 is rotatably connected to the movable groove 5 via a rotating knob 6. The oppositely arranged opening is used to accommodate the cooperating link 3. The opening angle is greater than 120 degrees to allow the cooperating link 3 to rotate smoothly. The larger the opening angle, the larger the range of rotation angle of the rotating sealing plate 121, thereby expanding the air circulation range and increasing the permeability of the entire fireproof barrier. The cooperating link 3 is rotatably connected to the movable groove 5 via a rotating knob 6, which is detachable.

[0052] The inner wall of the outer frame 11 is provided with a raised base 23, on which two rotating bearings 24 are provided. A rotating shaft 25 is longitudinally arranged in the middle of the closed filter frame 21, and the bottom end of the rotating shaft 25 is inserted into the rotating bearing 24. The raised base is used to house the rotating bearing 24. To ensure smooth rotation of the closed filter frame 21, the rotating bearing 24 is added to improve the smoothness of rotation and to cooperate with the rotating shaft 25. During installation, the bottom of the rotating shaft 25 is directly aligned and inserted into the rotating bearing 24 to complete the installation. Correspondingly, when replacing the closed filter frame 21, the rotating shaft 25 is pulled upwards to disconnect the connection.

[0053] The rotating shaft 25 extends upward from its top, and a replacement plate 26 connects the two rotating shafts 25 at the top. The replacement plate 26 has an arc-shaped notch, the position of which corresponds to the position of the rotating knob 6 on the cooperating link 3. The replacement plate 26 between the two rotating shafts 25 provides a fulcrum for replacing the filter assembly 2, and the notch is provided to reserve space. There are two cooperating links 3 below the replacement plate 26. The notch is provided to facilitate the removal and installation of the rotating knob 6 on the cooperating link 3. When replacing the closed filter frame 21, the filter assembly 2 can be lifted or placed through the replacement plate 26. Preferably, the height of the top of the rotating shaft 25 corresponds to the height of the fixed panel 7.

[0054] Reference Figure 3 , Figure 3 This is a schematic diagram showing the installation groove and filter screen assembly in some embodiments of this utility model.

[0055] According to some embodiments of this utility model, optionally, the mounting groove 4 is convex in shape and has a fixing panel 7 horizontally arranged inside. The height of the fixing panel 7 is lower than the height of the outer frame 11. An inner frame 8 is provided on the bottom side of the convex mounting groove 4, and the outer frame 11 communicates with the outside through the inner frame 8. In order to make the entire outer frame 11 flat, a downwardly recessed fixing panel 7 is provided to accommodate the closing plate 9 and fix the position of the closing plate 9. The inner frame 8 is provided for the operator to pull out the filter assembly 2.

[0056] A closing plate 9 is rotatably connected to the bottom side of the inner frame 8. The closing plate 9 is convex in shape and fits the size of the mounting groove 4. Several fixing screw holes are provided at intervals on the fixing panel 7, and fixing bolts are screwed onto the closing plate 9 accordingly. The fixing bolts are screwed into the fixing screw holes. The closing plate 9 and the fixing panel 7 are fixed together by fixing bolts to ensure the airtightness of the entire fireproof gate. The rotatable closing plate 9 can be repeatedly opened and closed.

[0057] Two limiting holes 91 are extended from the closed plate 9, and the positions of the limiting holes 91 correspond to the positions of the rotating shaft 25. The limiting holes 91 are fitted around the rotating shaft 25, and the limiting holes 91 also have limiting grooves 92. The limiting grooves 92 on the two limiting holes 91 are arranged opposite each other, and the replacement plate 26 is locked in the limiting groove 92. The limiting holes 91 cooperate with the rotating bearing 24 at the bottom to fix the position of the rotating shaft 25, so that the central axis of the closed filter frame 21 remains stable during rotation. The notch is provided to accommodate the replacement plate 26.

[0058] The height of the inner frame 8 is greater than the thickness of the closed filter frame 21. During the replacement process, the operator unscrews the bolts on the closing plate 9, opens the closing plate 9, removes the corresponding rotating knobs 6, disengaging the connecting rod 3 from the closed filter frame 21. The filter assembly 2 is then moved backward by the replacement plate 26, causing the end of the connecting rod 3 to disengage from the movable slot 5. The filter assembly 2 is then pulled out of the inner frame 8, replaced with a new filter assembly 2, and inserted into the inner frame 8. The end of the connecting rod 3 is then placed into the movable slot 5, the rotating knob 6 is secured, and the closing plate 9 is screwed in, completing the replacement process.

[0059] The rotating closing assembly 12 also includes an actuator 122, which is located outside the outer frame 11 and in front of the mounting groove 4. The actuator 122 is electrically connected to the rotating sealing plate 121 and is used to drive the rotating sealing plate 121 to rotate. The actuator 122 is used to receive relevant temperature data, determine whether a fire has occurred, and drive the motor to rotate the rotating sealing plate 121. The specific structure of the rotating closing assembly 12 is a common structure of fire dampers in the prior art, and can be referred to the prior art for details, which will not be elaborated here.

[0060] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0061] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0062] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A fireproof gate with an easily replaceable filter screen, characterized in that, include The fire damper body includes an outer frame and a rotating closing assembly disposed within the outer frame; A filter assembly is disposed within the outer frame and located behind the rotating closure assembly. The filter assembly includes two closed filter frames that are rotatably connected to the outer frame. Several cooperating links are connected at intervals between the rotating closing assembly and the closed filter frame; The mounting slot is provided on the outer frame and corresponds to the position of the filter assembly; The closed filter frame contains a filter screen, and two movable slots are symmetrically arranged on the top of the closed filter frame. The rotating closing assembly includes two rotating sealing plates, and the top of the rotating sealing plates is also correspondingly provided with two movable slots. One end of the cooperating link is rotatably connected to the movable slot on the rotating sealing plate, and the other end of the cooperating link is rotatably connected to the movable slot in the closed filter frame.

2. The fireproof gate with easily replaceable filter screen according to claim 1, characterized in that, The movable slot has an opening, and the opening on the rotating sealing plate is opposite to the opening of the closed filter frame. The opening has an opening angle greater than 120 degrees. The cooperating link is rotatably connected to the movable slot via a rotating knob.

3. The fireproof gate with easily replaceable filter screen according to claim 2, characterized in that, The inner wall of the outer frame is provided with a raised base, and the raised base is provided with two rotating bearings. The closed filter screen frame is provided with a rotating shaft in the middle longitudinally, and the bottom end of the rotating shaft is inserted into the rotating bearing.

4. The fireproof gate with easily replaceable filter screen according to claim 3, characterized in that, The top of the rotating shaft extends upward, and a replacement plate is connected between the two rotating shafts at the top. The replacement plate has an arc-shaped notch, and the position of the arc-shaped notch corresponds to the position of the rotating knob of the cooperating link.

5. The fireproof gate with easily replaceable filter screen according to claim 4, characterized in that, The mounting groove is convex in shape and has a fixing panel horizontally arranged inside. The height of the fixing panel is lower than the height of the outer frame. The bottom side of the convex mounting groove has an inner frame, and the outer frame communicates with the outside through the inner frame.

6. The fireproof gate with easily replaceable filter screen according to claim 5, characterized in that, The bottom side of the inner frame is rotatably connected to a closing plate. The closing plate is convex in shape and is adapted to the size of the mounting groove. Several fixing screw holes are provided at intervals on the fixing panel. Fixing bolts are screwed onto the closing plate and are screwed into the fixing screw holes.

7. The fireproof gate with easily replaceable filter screen according to claim 6, characterized in that, The closed plate extends with two limiting holes, the positions of which correspond to the positions of the rotating shaft. The limiting holes are fitted around the rotating shaft, and limiting grooves are also provided on the limiting holes. The limiting grooves on the two limiting holes are arranged opposite to each other, and the replacement plate is locked in the limiting groove.

8. The fireproof gate with easily replaceable filter screen according to claim 5, characterized in that, The height of the inner frame is greater than the thickness of the closed filter frame.

9. The fireproof gate with easily replaceable filter screen according to claim 1, characterized in that, The rotating closure assembly also includes an actuator, which is located outside the outer frame and in front of the mounting groove. The actuator is electrically connected to the rotating sealing plate and is used to drive the rotating sealing plate to rotate.

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