Fire protection damper

Abstract

The present invention discloses a fire protection fire damper, which relates to the technical field of fire dampers, and comprises a mounting component, wherein the mounting component comprises a mounting cylinder and a mounting side ring plate connected to both ends of the mounting cylinder, and the mounting side ring plate is provided with a mounting hole; a closing component, wherein the closing component comprises a rotating closing component and a closing transmission component arranged inside the rotating closing component, and a closing control component is connected to the rotating closing component; the rotating closing component comprises a closing mounting seat and a closing mounting member arranged inside the closing mounting seat; the closing mounting member comprises a rotating connecting sleeve and a rotating slideway provided on the rotating connecting sleeve, one end of the rotating connecting sleeve is connected to an intermediate connecting plate, and a closing plate is connected to the intermediate connecting plate; the problem that the working principle of some existing fire dampers is relatively complicated, and when the equipment fails, it is easy to affect the use effect of the fire damper, and at the same time increase the difficulty and cost of installation and maintenance is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire dampers, and in particular to a fire damper. Background Art

[0002] Fire dampers, as an indispensable key component of modern building fire protection systems, have undergone a long period of development and evolution in design, function and application. With the continuous advancement of fire protection technology, fire dampers play an increasingly important role in protecting the safety of life and property. Fire dampers are usually made of high temperature resistant and corrosion resistant materials, such as cast iron, aluminum alloy, etc., to ensure that the structural integrity and functionality can be maintained in high temperature environments.

[0003] The working principles of some existing fire dampers are relatively complicated, involving the coordinated work of multiple systems and components, which increases the difficulty and cost of design, installation and maintenance. At the same time, the performance and reliability of fire dampers depend to a large extent on the normal operation of other fire-fighting equipment, such as detectors, control systems, etc. If these devices malfunction or fail, the function and effect of the fire dampers may be affected. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the fact that the working principles of some of the existing fire dampers are relatively complicated, and when the equipment fails, it is easy to affect the use effect of the fire damper, while increasing the difficulty and cost of installation and maintenance, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a fire damper, comprising a mounting component, wherein the mounting component comprises a mounting cylinder and a mounting side ring plate connected to both ends of the mounting cylinder, and the mounting side ring plate is provided with a mounting hole;

[0007] The sealing component comprises a rotating sealing component and a sealing transmission component arranged inside the rotating sealing component, and the rotating sealing component is connected to a sealing control component.

[0008] As a preferred solution of the fire damper of the present invention, the rotating closing assembly includes a closing mounting seat and a closing mounting member arranged inside the closing mounting seat.

[0009] As a preferred solution of the fire damper of the present invention, the closed mounting seat comprises a mounting seat body and a mounting seat inner cavity opened inside the mounting seat body, and a flow hole is opened on the mounting seat body;

[0010] The closed mounting member comprises a rotating connecting sleeve and a rotating slideway provided on the rotating connecting sleeve. One end of the rotating connecting sleeve is connected to an intermediate connecting plate, and the intermediate connecting plate is connected to a closed plate.

[0011] As a preferred solution of the fire damper of the present invention, the closed transmission assembly includes a main adjusting member and an intermediate transmission member connected to one end of the main adjusting member, and an adjusting rod is connected to one side of the intermediate transmission member.

[0012] As a preferred solution of the fire damper of the present invention, the main adjusting member includes an adjusting threaded rod and an adjusting connector connected to one end of the adjusting threaded rod.

[0013] As a preferred solution of the fire damper described in the present invention, the intermediate transmission member includes an intermediate transmission sleeve and an adjustment connecting groove opened at one end of the intermediate transmission sleeve, a limited displacement block is connected to the intermediate transmission sleeve, and a limited position slideway is opened on the intermediate transmission sleeve.

[0014] As a preferred solution of the fire damper described in the present invention, the adjusting rod comprises a moving main rod and a limiting ring connected to the moving main rod, one end of the moving main rod is connected to a limiting guide rod, and the other end of the moving main rod is connected to a fixed moving block, and a fixed slot is provided on the fixed moving block.

[0015] As a preferred solution of the fire damper described in the present invention, the closed control component includes a mounting platform and a shifting member installed on the mounting platform, a fixed adjusting member is provided on one side of the mounting platform, and a fixed clamping member is provided on the other side of the fixed adjusting member, a limiting sliding rod is connected to the outer side of the fixed clamping member, and a return spring is provided on the outer side of the limiting sliding rod, and a fixed metal rod is provided on the inner side of the mounting platform.

[0016] As a preferred solution of the fire damper of the present invention, the shift member includes a shift adjustment rod and a mounting limit plate connected to the shift adjustment rod, and the shift adjustment rod is provided with a shift plate.

[0017] As a preferred solution of the fire damper of the present invention, the fixed adjustment member comprises a fixed adjustment ring and a first matching block connected to the inner side of the fixed adjustment ring, a limiting ball is connected to the fixed adjustment ring, and a locking circular groove is provided on the outer side of the fixed adjustment ring;

[0018] The fixed engaging member comprises a fixed slide plate and a fixed engaging block connected to one side of the fixed slide plate, and the other side of the fixed slide plate is connected to a second matching block.

[0019] The beneficial effects of the present invention are as follows: the fire damper can be securely mounted on the pipe by installing the side ring plate and setting the mounting hole; when in use, the fixed metal rod needs to be inserted into the interior of the mounting platform, and the fixed adjusting member is clamped and positioned, and then the stop member is used to limit the fixed metal rod to prevent it from falling off; when a fire occurs and causes the smoke temperature inside the pipe to be too high, the fixed metal rod will melt and fall off due to the high temperature, thereby loosening the limit on the fixed adjusting member, allowing the fixed adjusting member to rotate under a series of transmission actions of the closed transmission component, thereby driving the rotating closed component to operate, thereby achieving sealing of the interior of the pipe to prevent the spread of smoke and limit the spread of fire.

[0020] If the fixed metal rod needs to be replaced after use, first use the main adjustment part to pull the intermediate transmission part back to its original position, and turn the gear adjustment rod to move the gear plate; then turn the fixed adjustment part to restore it to the installation position; then insert the new fixed metal rod through the jack on the mounting table, and ensure that it is correctly engaged with the engagement groove; finally, turn the gear adjustment rod again to allow the gear plate to restrict the new fixed metal rod. This installation and maintenance process is faster and more convenient; in addition, the working process of the fire damper is independent and does not interact with other electrical and detection equipment, so the use of the fire damper will not be affected by the failure of the electrical and detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the overall structure of the sealing component in the present invention.

[0024] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0026] Figure 5 It is a schematic diagram of the structure of the shifting member in the present invention.

[0027] Figure 6 It is a schematic diagram of the exploded structure of the closed transmission assembly in the present invention.

[0028] Figure 7 For the present invention Figure 6Enlarged structural diagram at B in the middle.

[0029] Figure 8 It is a structural schematic diagram of the adjusting rod in the present invention.

[0030] Fig. 9 It is a schematic diagram of the connection structure between the closed mounting seat and the closed mounting member in the present invention.

[0031] In the figure: 10, mounting component; 11, mounting cylinder; 12, mounting side ring plate; 13, mounting hole; 20, closing component; 21, rotating closing assembly; 211, closed mounting seat; 2111, mounting seat body; 2112, mounting seat inner cavity; 2113, flow hole; 212, closed mounting member; 2121, rotating connecting sleeve; 2122, rotating slideway; 2123, intermediate connecting plate; 2124, closing plate; 22, closed transmission assembly; 221, main adjusting member; 2211, adjusting threaded rod; 2212, adjusting connector; 222, intermediate transmission member; 2221, intermediate transmission sleeve; 2222, adjusting connecting groove; 2223, displacement limit block; 2224, limit slideway; 223, adjusting rod; 2231, moving main rod; 2232, limiting ring; 2233, limiting guide rod; 2234, fixed moving block; 2235, fixed slot; 23, closed control assembly; 231, mounting table; 232, shifting member; 2321, shifting adjusting rod; 2322, installing limiting plate; 2323, shifting plate; 233, fixed adjusting member; 2331, fixed adjusting ring; 2332, first matching block; 2333, limiting ball; 2334, engaging groove; 234, fixed engaging member; 2341, fixed slide plate; 2342, fixed engaging block; 2343, second matching block; 235, limiting slide bar; 236, reset spring; 237, fixed metal rod. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Example 1

[0035] Reference Figure 1~Figure 4 and Figure 6~Figure 9, which is the first embodiment of the present invention, provides a fire damper, including a mounting component 10, the mounting component 10 includes a mounting cylinder 11 and a mounting side ring plate 12 connected to both ends of the mounting cylinder 11, and the mounting side ring plate 12 is provided with mounting holes 13, wherein the mounting side ring plate 12 is fixedly mounted on both ends of the mounting cylinder 11, and the mounting holes 13 are arranged on the mounting side ring plate 12 at equal angles with respect to the center of the mounting cylinder 11. During installation, the fire damper is fixedly mounted on the pipeline by bolts through the mounting holes 13; a closing component 20, the closing component 20 includes a rotating closing group The rotary closure component 21 and the closed transmission component 22 are arranged inside the rotary closure component 21, and the rotary closure component 21 is connected with a closed control component 23, wherein the rotary closure component 21 and the closed transmission component 22 are cooperatively connected together, and the rotary closure component 21 is controlled to open and close the fire damper through the connection transmission of the closed transmission component 22. At the same time, the closed control component 23 is cooperatively connected to the outside of the closed transmission component 22, and the position of the closed transmission component 22 is limited by the closed control component 23 to complete the control of the movement of the closed transmission component 22.

[0036] The rotary closure assembly 21 includes a closed mounting seat 211 and a closed mounting member 212 arranged inside the closed mounting seat 211. The closed mounting seat 211 is fixedly mounted inside the mounting cylinder 11, and the closed mounting member 212 is rotatably connected to the inside of the closed mounting seat 211. At the same time, the closed mounting seat 211 and the closed mounting member 212 are tightly fitted; the closed mounting seat 211 includes a mounting seat body 2111 and a mounting seat inner cavity 2112 opened inside the mounting seat body 2111. The mounting seat body 2111 is provided with a flow hole 2113, wherein the mounting seat body 2111 is welded to the inside of the mounting cylinder 11, and the flow holes 2113 are arranged at equal angles with respect to the center of the mounting seat body 2111. There are multiple groups of closed mounting parts 212, including a rotating connecting sleeve 2121 and a rotating slideway 2122 provided on the rotating connecting sleeve 2121, one end of the rotating connecting sleeve 2121 is connected to an intermediate connecting plate 2123, and the intermediate connecting plate 2123 is connected to a closing plate 2124, wherein the rotating connecting sleeve 2121 is connected to the mounting seat body 2111 in a rotating manner, and the closing plate 2124 is limitedly rotated inside the mounting seat inner cavity 2112, and the closing plate 2124 is fixedly connected to the rotating connecting sleeve 2121 by using the intermediate connecting plate 2123, and the closing plate 2124 is provided with the same number as the flow holes 2113, so that the closing plate 2124 can block the flow holes 2113.

[0037] The closed transmission assembly 22 includes a main adjusting member 221 and an intermediate transmission member 222 connected to one end of the main adjusting member 221, and an adjusting rod 223 is connected to one side of the intermediate transmission member 222, wherein the main adjusting member 221 and the closed mounting seat member 211 are connected in a threaded manner, and the main adjusting member 221 and the intermediate transmission member 222 are connected together in a rotating manner, so that the main adjusting member 221 can drive the intermediate transmission member 222 to move, and the intermediate transmission member 222 will not rotate when moving, and the adjusting rod 223 moves within the intermediate transmission member 222; the main adjusting member 221 includes an adjusting threaded rod 2211 and an adjusting connector 2212 connected to one end of the adjusting threaded rod 2211, and the cross-sectional shape of the adjusting connector 2212 is an isosceles trapezoid; the intermediate transmission member 221 includes an adjusting threaded rod 2211 and an adjusting connector 2212 connected to one end of the adjusting threaded rod 2211, and the cross-sectional shape of the adjusting connector 2212 is an isosceles trapezoid; 22 includes an intermediate transmission sleeve 2221 and an adjustment connection groove 2222 provided at one end of the intermediate transmission sleeve 2221, a limited displacement block 2223 is connected to the intermediate transmission sleeve 2221, and a limited position slideway 2224 is provided on the intermediate transmission sleeve 2221, wherein the intermediate transmission sleeve 2221 moves horizontally inside the closed mounting seat 211, and the longitudinal section of the adjustment connection groove 2222 is an isosceles trapezoid, and its size is slightly larger than that of the adjustment connection head 2212, so that the adjustment connection head 2212 is matched and connected inside the adjustment connection groove 2222, and at the same time, through the setting of the limited displacement block 2223, the limited displacement block 2223 slides inside the slot provided inside the closed mounting seat 211, so that it limits the horizontal movement of the intermediate transmission sleeve 2221 and prevents the intermediate transmission sleeve 2221 from rotating;

[0038] The adjusting rod 223 includes a moving main rod 2231 and a limiting ring 2232 connected to the moving main rod 2231. One end of the moving main rod 2231 is connected to a limiting guide rod 2233, and the other end of the moving main rod 2231 is connected to a fixed moving block 2234. A fixed slot 2235 is provided on the fixed moving block 2234. A strong spring is provided on one side of the limiting ring 2232 to push the moving main rod 2231 to move and complete the closing action of the fire damper. The limiting guide rod 2233 is limited in the rotating slide 2122 to move the limiting guide rod 2233. When 2233 moves horizontally, it can drive the rotating connecting sleeve 2121 to rotate, and then the closing plate 2124 to rotate, completing the closing of the fire damper. At the same time, the outer end of the limiting guide rod 2233 slides within the closed mounting seat 211 to limit the movement of the moving main rod 2231. The fixed moving block 2234 moves within the limiting slide 2224, so that the moving main rod 2231 will not rotate. At the same time, one side of the fixed slot 2235 is set as an inclined surface, and the two sides inside the fixed slot 2235 are also set as inclined surfaces.

[0039] During use, the closing plate 2124 is inside the inner cavity 2112 of the mounting seat and will not close the flow hole 2113. When a fire occurs, smoke flows inside the pipe, triggering the closing control component 23, causing the closing control component 23 to release the engagement with the fixed moving block 2234, causing the fixed moving block 2234 to move under the action of the strong spring on one side of the limiting ring 2232. Since the limiting guide rod 2233 cooperates inside the rotating slide 2122, the movement of the limiting guide rod 2233 drives the rotating connecting sleeve 2121 to rotate, thereby driving the closing plate 2124 to rotate, and finally causing the closing plate 2124 to close the flow hole 2113 to prevent the smoke from continuing to spread, thereby preventing the fire from further developing.

[0040] Example 2

[0041] Reference Figure 2~Figure 7 , which is the second embodiment of the present invention. On the basis of embodiment 1, this embodiment is further improved in that: the closed control component 23 includes a mounting platform 231 and a stopper 232 mounted on the mounting platform 231, a fixed adjustment member 233 is provided on one side of the mounting platform 231, and a fixed engaging member 234 is provided on the other side of the fixed adjustment member 233, the outer side of the fixed engaging member 234 is connected to a limited sliding rod 235, and a return spring 236 is provided on the outer side of the limited sliding rod 235, and a fixed metal rod 237 is provided on the inner side of the mounting platform 231, wherein one end of the mounting platform 231 is fixedly mounted on the closed mounting seat 211, and the other end is fixedly mounted on the mounting cylinder 11, and the fixed adjustment member 233 is provided on the other side of the fixed adjusting member 233. The member 233 is limitedly rotated on the outside of the closed mounting seat member 211, and the fixed adjustment member 233 is connected to the fixed engaging member 234 in a limited matching manner. At the same time, a sliding hole is opened on the fixed engaging member 234, so that the fixed engaging member 234 is installed on the limited sliding rod 235. The return spring 236 is fixedly connected to one side of the fixed engaging member 234 and is located on the outside of the limited sliding rod 235. The fixed metal rod 237 is installed inside the mounting platform 231 to limit and fix the fixed adjustment member 233. At the same time, the fixed metal rod 237 is a specific metal alloy material, which will melt and fall off when the temperature reaches a certain level to loosen the restriction on the fixed adjustment member 233.

[0042] The shift member 232 includes a shift adjustment rod 2321 and a mounting limit plate 2322 connected to the shift adjustment rod 2321. The shift adjustment rod 2321 is provided with a shift plate 2323, wherein the shift adjustment rod 2321 is provided with two sections of threaded structures, and the threaded structures have opposite rotation directions. At the same time, the shift plate 2323 is threadedly connected to the shift adjustment rod 2321, and the mounting limit plate 2322 plays a role of limiting installation; the fixed adjustment member 233 includes a fixed adjustment ring 2331 and a fixed adjustment ring connected to the fixed adjustment ring The first matching block 2332 on the inner side of 2331, the fixed adjustment ring 2331 is connected with a limiting ball 2333, and the outer side of the fixed adjustment ring 2331 is provided with a snap-fitting circular groove 2334, wherein one side of the first matching block 2332 is arranged in an arc shape, and the first matching block 2332 is arranged centrally symmetrically with respect to the center of the fixed adjustment ring 2331, and the limiting ball 2333 is limitedly slid inside the closed mounting seat 211, and at the same time, the snap-fitting circular groove 2334 is snap-fitted and connected with the fixed metal rod 237;

[0043] The fixed engaging member 234 includes a fixed slide 2341 and a fixed engaging block 2342 connected to one side of the fixed slide 2341, and a second matching block 2343 is connected to the other side of the fixed slide 2341, wherein the fixed slide 2341 is slidably connected to the limiting slide bar 235, and at the same time, both sides of one end of the fixed engaging block 2342 are inclined, and its inclination angle is the same as the inclination angle of the internal inclined surface of the fixed slot 2235, and the two can be engaged with each other, and one side of the second matching block 2343 is arc-shaped, and it is matched with the first matching block 2332, so that the rotation of the fixed adjustment ring 2331 can be achieved through the matching connection between the first matching block 2332 and the second matching block 2343, so that the fixed engaging block 2342 is moved to complete the engagement and disengagement with the fixed slot 2235.

[0044] When in use, the fixed metal rod 237 is used to limit the fixed adjustment member 233 so as to complete the position limit fixation of the adjustment rod 223. When a fire occurs, the temperature of the smoke inside the pipe is too high, so that the fixed metal rod 237 melts, and the fixed metal rod 237 releases the restriction on the fixed adjustment member 233, and finally the fixed adjustment member 233 moves, so that the closed mounting member 212 rotates and completes the closing of the closed mounting seat 211.

[0045] At the same time, when it needs to be re-fixed after use, first rotate the adjusting threaded rod 2211, and use the rotating connection between the adjusting connecting head 2212 and the adjusting connecting groove 2222 to make the adjusting threaded rod 2211 drive the intermediate transmission sleeve 2221 to move, and since the fixed moving block 2234 is limitedly installed inside the limiting slide 2224, the moving main rod 2231 is moved and reset, and then the gear adjustment rod 2321 is rotated to move the gear plate 2323, and the fixed adjustment ring 2331 is rotated to restore the engaging circular groove 2334 to the engaging position, and the new fixed metal rod 237 is inserted into the hole inside the mounting platform 231 to engage the fixed metal rod 237 with the engaging circular groove 2334, and finally the gear adjustment rod 2321 is rotated to restore the gear plate 2323 to the position, completing the restriction of the fixed metal rod 237 and completing the installation.

[0046] The remaining structures are the same as those of Example 1.

[0047] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be changed or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

Claims

1. A fire damper, characterized in that: include, A mounting component (10), the mounting component (10) comprising a mounting cylinder (11) and a mounting side ring plate (12) connected to both ends of the mounting cylinder (11), the mounting side ring plate (12) being provided with a mounting hole (13); A sealing component (20), the sealing component (20) comprising a rotary sealing component (21) and a sealing transmission component (22) arranged inside the rotary sealing component (21), the rotary sealing component (21) being connected to a sealing control component (23); The rotating closed component (21) comprises a closed mounting seat (211) and a closed mounting member (212) arranged inside the closed mounting seat (211); The closed mounting seat component (211) comprises a mounting seat body (2111) and a mounting seat inner cavity (2112) provided inside the mounting seat body (2111); a flow hole (2113) is provided on the mounting seat body (2111); The closed mounting member (212) comprises a rotating connection sleeve (2121) and a rotating slideway (2122) provided on the rotating connection sleeve (2121); one end of the rotating connection sleeve (2121) is connected to an intermediate connection plate (2123), and the intermediate connection plate (2123) is connected to a closed plate (2124); The closed transmission assembly (22) comprises a main adjustment member (221) and an intermediate transmission member (222) connected to one end of the main adjustment member (221), and an adjustment rod (223) is connected to one side of the intermediate transmission member (222); The main adjustment member (221) comprises an adjustment threaded rod (2211) and an adjustment connector (2212) connected to one end of the adjustment threaded rod (2211); The intermediate transmission member (222) comprises an intermediate transmission sleeve (2221) and an adjustment connection groove (2222) provided at one end of the intermediate transmission sleeve (2221); a limited displacement block (2223) is connected to the intermediate transmission sleeve (2221); and a limited position slideway (2224) is provided on the intermediate transmission sleeve (2221); The adjusting connector (2212) is fitted and connected inside the adjusting connector groove (2222); The adjusting rod (223) comprises a movable main rod (2231) and a limiting ring (2232) connected to the movable main rod (2231); one end of the movable main rod (2231) is connected to the limiting guide rod (2233), and the other end of the movable main rod (2231) is connected to a fixed movable block (2234); and a fixed slot (2235) is provided on the fixed movable block (2234); A strong spring is provided on one side of the limiting ring (2232) for pushing the moving main rod (2231) to move; By utilizing the limiting movement of the limiting guide rod (2233) inside the rotating slideway (2122), the limiting guide rod (2233) drives the rotating connecting sleeve (2121) to rotate when it moves horizontally; The fixed moving block (2234) moves inside the limiting slideway (2224); The sealing control assembly (23) comprises a mounting platform (231) and a stopper (232) mounted on the mounting platform (231); a fixed adjustment member (233) is disposed on one side of the mounting platform (231); a fixed engaging member (234) is disposed on the other side of the fixed adjustment member (233); a limiting sliding rod (235) is connected to the outer side of the fixed engaging member (234); a return spring (236) is disposed on the outer side of the limiting sliding rod (235); the return spring (236) is fixedly connected to one side of the fixed engaging member (234); and a fixed metal rod (237) is disposed on the inner side of the mounting platform (231); When the temperature reaches a certain level, the fixed metal rod (237) will melt and fall off, thereby releasing the restriction on the fixed adjustment member (233); The fixed adjustment member (233) comprises a fixed adjustment ring (2331) and a first matching block (2332) connected to the inner side of the fixed adjustment ring (2331); a limiting ball (2333) is connected to the fixed adjustment ring (2331); and a locking circular groove (2334) is provided on the outer side of the fixed adjustment ring (2331); The fixed metal rod (237) is engaged and connected with the engaging circular groove (2334); The fixed engaging member (234) comprises a fixed slide plate (2341) and a fixed engaging block (2342) connected to one side of the fixed slide plate (2341), and the other side of the fixed slide plate (2341) is connected to a second matching block (2343); The fixed slide plate (2341) is slidably connected to the limiting slide bar (235); One side of the first matching block (2332) is arranged in an arc shape, one side of the second matching block (2343) is arranged in an arc shape, and the second matching block (2343) and the first matching block (2332) are matched with each other; The fixed engaging block (2342) is moved to achieve engagement and disengagement with the fixed engaging slot (2235).

2. The fire damper according to claim 1, characterized in that: The shifting member (232) comprises a shifting adjustment rod (2321) and a mounting limit plate (2322) connected to the shifting adjustment rod (2321); the shifting adjustment rod (2321) is provided with a shifting plate (2323).

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