Modularized flue gas baffle door

Abstract

When smoke suddenly flows back, a backflow plate and an inclined telescopic rod are in linkage to enable the whole baffle door module to be rapidly closed, backflow is rapidly blocked, front-end equipment is protected, when the baffle door is closed, a fan-shaped air bag is pressed, gas enters an elastic gas storage bag through a gas pipe, the fan-shaped air bag and the elastic gas storage bag jointly compress an elastic liquid storage bag, and the elastic gas storage bag and the fan-shaped air bag are closed. The elastic liquid storage bag can be recovered to the initial state, the contact area between the sealing strip and the frame is reduced, the friction force is reduced, the service life of the sealing strip is prolonged, in addition, the self-locking mechanism provides reliable mechanical guarantee, and the service life of the sealing strip is prolonged. When the baffle door is in an open state, the electromagnet can be controlled to drive the guide rod to reciprocate and drive the top plate to reciprocate, vibration is generated to clean ash of the whole baffle door module, smoke dust adhesion is prevented from affecting the air tightness, and long-term stable operation of the system is ensured.

Description

Technical Field

[0001] The present invention relates to a modular smoke damper door, and in particular to a modular smoke damper door applied in the technical field of damper doors. Background Art

[0002] As the main equipment for cutting off the medium, the damper door is suitable for flue gas desulfurization system or coal transportation system, and is widely used in the fields of electricity, metallurgy, chemical industry, light industry, grain, etc. It has the function of full opening and closing, allowing the medium to flow or shut off in the pipeline, and is used to adjust and cut off the flue gas flow.

[0003] Chinese invention patent CN104879763A discloses a baffle door, which includes: an angled valve frame and a double-leaf valve plate, and adopts elastic sealing technology to ensure that the baffle door has sealing performance and can be opened and closed flexibly. Combined with multi-point air compensation technology, the baffle door achieves zero leakage and reliable sealing performance. Although the present invention solves the problem of air tightness of the baffle door, due to the frequent opening and closing of the double-leaf valve plate, the elastic sealing plate will experience a lot of friction and compression, which may cause wear or permanent deformation, thereby reducing its sealing effect, and it also lacks the backflow closing function.

[0004] Chinese invention patent CN106369621A discloses an imported baffle door with a simple structure, low cost and reliable sealing performance. The baffle door includes a frame, a blade and an actuator, wherein the actuator is connected to the blade through a bracket and a rotating shaft to realize the control of the blade. A cavity is provided at the top of the blade, and a sealing device consisting of a sealing plate and a sealing bag is provided on the upper and lower inner sides of the frame. The sealing plate is fixed to the inner side of the frame by bolts, and the sealing bag is integrally connected to the sealing plate. In addition, a liquid injection device including a pneumatic push rod, a plunger-type liquid tank and a liquid injection tube is also provided, which is used to inject liquid into the sealing bag to enhance the sealing effect, thereby ensuring the safety and reliability of the entire device. Although the present invention enhances the sealing effect, it has certain requirements on the installation position and space, which limits its scope of application, and the sealing bag is easily damaged by repeated hard friction, and lacks a reflux closing function.

[0005] To this end, we have adopted this technical solution to solve the problems that the existing baffle door lacks the reflux closing function, is not tightly closed after being worn out after multiple opening and closing, and the seal is easily rubbed against the frame, resulting in a shortened service life and leakage. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the traditional smoke damper door cannot be closed in time when the smoke refluxes, which is easy to damage the front-end equipment, and is not closed tightly after multiple openings and closings, resulting in smoke leakage and seal wear, shortening the service life.

[0007] In order to solve the above problems, the present invention provides a modular smoke damper door, comprising a frame, the inner end of the frame is rotatably connected to the damper door module through a driving shaft, and the driving shaft runs through the frame, the damper door module comprises a hollow door plate rotatably connected to the outer end of the driving shaft, the inner wall of the hollow door plate is fixedly connected to a sleeve, the end of the driving shaft close to the sleeve is fixedly connected to a spline shaft, the outer end of the spline shaft is provided with a plurality of key grooves distributed in a circumferential array, the inner end of the key groove is clamped with a clamping plate, the outer end of the sleeve is fixedly connected to a sliding sleeve, and the inner wall of the sliding sleeve is slidably connected to the outer end of the clamping plate, the end of the clamping plate away from the spline shaft is fixedly connected to a push rod, and the inner wall of the hollow door plate is fixedly connected to A partition is connected, a push rod passes through the partition and is slidably connected to the partition, the outer end of the push rod is fixedly connected to a snap ring, the outer end of the push rod is slidably connected to a return spring, the end of the return spring close to the snap ring is against the snap ring, the end of the return spring away from the snap ring is against the partition, the end of the push rod away from the snap ring is rotatably connected to a guide connecting rod through a pin, the end of the guide connecting rod close to the inner wall of the hollow door panel is rotatably connected to the hollow door panel through a pin, the end of the guide connecting rod away from the hollow door panel is rotatably connected to an oblique telescopic rod through a pin, the end of the oblique telescopic rod away from the guide connecting rod is rotatably connected to a return plate through a pin, and the bottom end of the return plate is rotatably connected to the inner wall of the hollow door panel through a rotating shaft;

[0008] The two ends of the hollow door panel that are away from each other are fixedly connected to a support frame, the inner wall of the support frame is fixedly connected to a self-locking component, the self-locking component includes an electromagnet fixedly connected to the inner wall of the support frame, the inner end of the electromagnet is slidably connected to a guide rod, the end of the guide rod away from the electromagnet is fixedly connected to a locking frame, the outer end of the locking frame is slidably connected to the inner wall of the support frame, and the end of the locking frame away from the guide rod is fixedly connected to a top plate.

[0009] As a further improvement of the present application, the inner wall of the locking frame is fixedly connected to a fixing plate, the end of the fixing plate away from the guide rod is fixedly connected to an elastic air storage bag, the end of the elastic air storage bag away from the guide rod is fixedly connected to an elastic liquid storage bag, the end of the elastic liquid storage bag away from the fixing plate is fixedly connected to the top plate, when the baffle door module is closed, the self-locking assembly contracts, the elastic liquid storage bag compresses the elastic air storage bag, causing the elastic air storage bag to contract, thereby providing power for resetting the return plate.

[0010] As a further improvement of the present application, both ends of the locking frame that are close to each other are fixedly connected with fan-shaped air bags through fixing blocks, the bottom end of the fan-shaped air bag is fixedly connected to the outer end of the return plate, the fan-shaped air bag is interconnected with the elastic air storage bag through the air pipe, the compressed gas in the elastic air storage bag is transmitted to the fan-shaped air bag through the air pipe, the superposition of the gas pressure in the fan-shaped air bag and the elastic air storage bag makes the return plate in a half-open state, thereby increasing the contact area between the return smoke and the return plate, making it easier for the return plate to drive the baffle door module to close automatically.

[0011] As a further improvement of the present application, a sealing strip is fixedly connected to the outer end of the hollow door panel, and the sealing strip is filled with thermal expansion liquid. A through hole is opened on the top plate, and the sealing strip is connected to the elastic liquid storage bag through the through hole. When the baffle door is closed, the thermal expansion liquid in the elastic liquid storage bag is pressurized and flows back to the sealing strip, so that the sealing strip is in closer contact with the inner wall of the frame, thereby enhancing the air tightness. When the smoke carries heat, the thermal expansion liquid absorbs heat and expands, which can further enhance the air tightness.

[0012] As another improvement of the present application, a rectangular groove is provided at the outer end of the support frame, and a rectangular block is fixedly connected to the outer end of the locking frame. The rectangular groove and the rectangular block are nested and can be nested when the self-locking assembly is contracted. When the self-locking assembly is extended, the rectangular block can be in close contact with the sealing strip to prevent air leakage from the gap between the locking frame and the sealing strip.

[0013] As another improvement supplement to the present application, a beveled edge is provided on the crossbeam of the frame corresponding to the guide link position, and the beveled edge can cause the locking assembly to automatically contract and clamp with the frame when the baffle door module is closed.

[0014] In summary, this application has the following beneficial effects:

[0015] (1) Automatic closure of reflux. Through the linkage mechanism between the reflux plate and the inclined telescopic rod, when smoke refluxes, the reflux plate can automatically rotate to increase the opening under the action of smoke pressure, thereby driving the entire damper door module to close. When abnormal smoke reflux is detected, the damper door can be quickly closed to protect the front-end or back-end equipment from damage, simplifying the operation process and improving the response speed and reliability of the system.

[0016] (2) Active sealing: When the damper door is closed, the fan-shaped airbag is compressed, and the compressed gas in the fan-shaped airbag enters the elastic air storage bag through the air pipe. The fan-shaped airbag and the pressurized gas in the elastic air storage bag jointly compress the elastic liquid storage bag, so that the thermal expansion liquid stored in the elastic liquid storage bag enters the sealing strip, thereby enhancing the sealing effect. Especially under high-temperature flue gas conditions, the thermal expansion liquid can further expand and provide better sealing performance. In addition, this sealing method can effectively prevent flue gas leakage, protect rotating parts from corrosion, and extend the service life of the equipment.

[0017] (3) Modular design. The smoke damper door adopts a modular design concept, so that the damper door modules can be independently manufactured, assembled and maintained, which facilitates installation and maintenance. Each damper door module can be replaced or adjusted as an independent unit, reducing maintenance time and cost. At the same time, the modular design also allows the number and arrangement of damper doors to be flexibly configured according to actual needs to adapt to different application scenarios and space constraints.

[0018] (4) Prevent friction between the sealing strip and the frame, and prevent the sealing strip from being worn during the opening and closing of the baffle door. When the baffle door is opened, the self-locking assembly contracts, and the return plate springs open to a certain angle under the action of gas pressure. At this time, the elastic liquid storage bag returns to its initial state, allowing part of the thermal expansion liquid in the sealing strip to flow back, reducing the contact area between the sealing strip and the frame, thereby reducing the friction between the two and extending the service life of the sealing strip.

[0019] (5) Self-locking and automatic cleaning. The self-locking mechanism provides a reliable mechanical guarantee. The self-locking component can automatically lock after the baffle door is closed, ensuring the airtightness of the baffle door in the closed state. When the baffle door is open, the electromagnet can be controlled to drive the guide rod to move back and forth, thereby driving the top plate (1404) to move back and forth. The reciprocating movement of the top plate hits the support frame and the hollow door panel to generate vibration to clean the entire baffle door module, so that the smoke and dust can be discharged with the smoke flow, preventing the smoke and dust from adhering to the baffle door and affecting the airtightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 Schematic diagram of the baffle door opening for this application;

[0022] Figure 3 This is a first partial view of the baffle door module of the present application;

[0023] Figure 4 For this application Figure 3 A magnified image of point A;

[0024] Figure 5 This is a second partial view of the baffle door module of the present application;

[0025] Figure 6 This is the framework diagram of this application;

[0026] Figure 7 This is a schematic diagram of the baffle door module opening for this application;

[0027] Figure 8 This is a schematic diagram of the reflux closed state for this application;

[0028] Fig. 9 This is a schematic diagram of the baffle door module backflow closure for this application;

[0029] Fig.10 For this application Fig. 9 BB cross-sectional view.

[0030] Description of the numbers in the figure:

[0031] 1. Frame; 2. Drive shaft; 3. Hollow door panel; 4. Sleeve; 5. Spline shaft; 6. Keyway; 7. Clamp plate; 8. Sliding sleeve; 9. Push rod; 10. Partition plate; 11. Clamp ring; 12. Return spring; 13. Guide connecting rod; 1301. Oblique telescopic rod; 1302. Return plate; 14. Support frame; 1401. Electromagnet; 1402. Guide rod; 1403. Locking frame; 1404. Top plate; 15. Fixed plate; 16. Elastic air storage bag; 17. Elastic liquid storage bag; 18. Fan-shaped air bag; 19. Sealing strip; 20. Through hole; 21. Rectangular groove; 22. Rectangular block; 23. Beveled edge. DETAILED DESCRIPTION

[0032] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] Figure 1-10 Shown.

[0035] A modular smoke damper door comprises a frame 1, the inner end of the frame 1 is rotatably connected to a damper door module through a drive shaft 2, and the drive shaft 2 passes through the frame 1, the damper door module comprises a hollow door panel 3 rotatably connected to the outer end of the drive shaft 2, the inner wall of the hollow door panel 3 is fixedly connected to a sleeve 4, the end of the drive shaft 2 close to the sleeve 4 is fixedly connected to a spline shaft 5, the outer end of the spline shaft 5 is provided with a plurality of key grooves 6 distributed in a circumferential array, the inner end of the key groove 6 is clamped with a card plate 7, the outer end of the sleeve 4 is fixedly connected to a sliding sleeve 8, and the inner wall of the sliding sleeve 8 is slidably connected to the outer end of the card plate 7, the end of the card plate 7 away from the spline shaft 5 is fixedly connected to a push rod 9, the inner wall of the hollow door panel 3 is fixedly connected to a partition 10, and the push rod 9 passes through the partition 10 and slides with the partition 10 The outer end of the push rod 9 is fixedly connected with a snap ring 11, and the outer end of the push rod 9 is slidably connected with a return spring 12, the end of the return spring 12 close to the snap ring 11 is against the snap ring 11, and the end of the return spring 12 away from the snap ring 11 is against the partition 10, and the end of the push rod 9 away from the snap ring 11 is rotatably connected to the guide link 13 through a pin, and the end of the guide link 13 close to the inner wall of the hollow door panel 3 is rotatably connected to the hollow door panel 3 through a pin, and the end of the guide link 13 away from the hollow door panel 3 is rotatably connected to an oblique telescopic rod 1301 through a pin, and the end of the oblique telescopic rod 1301 away from the guide link 13 is rotatably connected to a return plate 1302 through a pin, and the bottom end of the return plate 1302 is rotatably connected to the inner wall of the hollow door panel 3 through a rotating shaft;

[0036] The two ends of the hollow door panel 3 that are away from each other are fixedly connected to the support frame 14, and the inner wall of the support frame 14 is fixedly connected to the self-locking component, the self-locking component includes an electromagnet 1401 fixedly connected to the inner wall of the support frame 14, the inner end of the electromagnet 1401 is slidably connected to the guide rod 1402, the end of the guide rod 1402 away from the electromagnet 1401 is fixedly connected to the locking frame 1403, the outer end of the locking frame 1403 is slidably connected to the inner wall of the support frame 14, and the end of the locking frame 1403 away from the guide rod 1402 is fixedly connected to the top plate 1404.

[0037] When installing the smoke damper door, the damper door module is assembled with the frame 1 in advance, and then the damper door is installed on the flue as a whole. When the damper door needs to be closed, it can be closed one by one. When the smoke is flowing, the damper door modules can be closed one by one according to the preset sequence of the control system to avoid the impact of shock waves and pressure surges caused by sudden closing on the front or back equipment, protect the system equipment and maintain smooth operation. When closing, the existing drive device drives the drive shaft 2 to rotate ninety degrees, and the rotation of the drive shaft 2 drives the spline shaft 5 to rotate. Since the reset spring 12 is against the retaining ring 11, the elastic force of the reset spring 12 makes the keyway 6 on the spline shaft 5 and the clamping plate 7 in a tightly clamped state. The rotation of the spline shaft 5 can be transmitted to the push rod 9, and then transmitted to the partition 10 through the push rod 9, thereby driving the entire damper door module to rotate. When the damper door module starts to rotate, the control system controls the self-locking component to automatically retract, the electromagnet 1401 drives the guide rod 1402 to retract, and the guide rod 14 02 contracts and drives the locking frame 1403 to slide along the inner wall of the support frame 14, and the locking frame 1403 drives the top plate 1404 to contract to a predetermined position. When the baffle door module rotates to ninety degrees and fits with the frame 1, the control system controls the electromagnet 1401 to move, and the electromagnet 1401 drives the guide rod 1402 to extend and push the locking frame 1403 out, so that the top plate 1404 is engaged with the retaining edge of the frame 1, and the baffle door is firmly locked. Conversely, when the baffle door needs to be opened, the control system first turns the self-locking The assembly contracts to release the locking state of the baffle door module and the frame 1, and the driving device then drives the entire baffle door module to rotate ninety degrees in the opposite direction to open it. When the baffle door is open, the electromagnet 1401 can be controlled to drive the guide rod 1402 to move back and forth, thereby driving the top plate 1404 to move back and forth. The reciprocating movement of the top plate 1404 hits the support frame 14 and the hollow door panel 3 to generate vibration to clean the entire baffle door module, so that the smoke and dust can be discharged with the smoke flow, preventing the smoke and dust from adhering to the baffle door and affecting the air tightness.

[0038] The second implementation method:

[0039] Figure 1-10 Shown.

[0040] On the basis of embodiment one, the inner wall of the locking frame 1403 is also fixedly connected to a fixing plate 15, an end of the fixing plate 15 away from the guide rod 1402 is fixedly connected to an elastic air storage bag 16, an end of the elastic air storage bag 16 away from the guide rod 1402 is fixedly connected to an elastic liquid storage bag 17, and an end of the elastic liquid storage bag 17 away from the fixing plate 15 is fixedly connected to the top plate 1404.

[0041] Both ends of the locking frame 1403 close to each other are fixedly connected with fan-shaped air bags 18 through fixing blocks, the bottom end of the fan-shaped air bag 18 is fixedly connected to the outer end of the return plate 1302, and the fan-shaped air bag 18 is connected to the elastic air storage bag 16 through an air pipe.

[0042] A rectangular groove 21 is formed at the outer end of the support frame 14 , and a rectangular block 22 is fixedly connected to the outer end of the locking frame 1403 , and the rectangular groove 21 and the rectangular block 22 are nested for use.

[0043] A chamfered edge 23 is provided on the crossbeam of the frame 1 at the position corresponding to the guide link 13 .

[0044] When the baffle door module is in the open state, the locking assembly is in the extended state, and the compressed gas in the elastic air bag 16 is transmitted to the fan-shaped air bag 18 through the air pipe. The superimposed gas pressure of the elastic air bag 16 and the fan-shaped air bag 18 pushes the return plate 1302 to open outward at a certain angle, so that the return plate 1302 is in a semi-open state. At the same time, the return plate 1302 drives the oblique telescopic rod 1301 to extend a certain distance to reach the limit of the oblique telescopic rod 1301 itself. When the smoke refluxes, the refluxed smoke contacts the surface of the return plate 1302. Under the action of the refluxed smoke pressure, the return plate 1302 continues to rotate. After the opening increases, the return plate 1302 pulls the oblique telescopic rod 1301, and then the oblique telescopic rod 1301 pulls the guide connecting rod 13 to rotate the guide connecting rod 13. The rotation of the guide connecting rod 13 drives the push rod 9 to move in the direction away from the sliding sleeve 8, and the push rod 9 The card plate 7 is driven to slide along the inner wall of the sliding sleeve 8, so that the card plate 7 is separated from the key slot 6. After the card plate 7 is separated from the key slot 6, the baffle door module rotates around the drive shaft 2 driven by its own gravity and the pressure of the reflux smoke, and automatically closes to prevent the reflux smoke from causing damage to the front-end equipment. When the baffle door module is automatically closed, the top plate 1404 on the locking frame 1403 contacts the beveled edge 23 on the frame 1. Under the action of the beveled edge 23, the top plate 1404 contracts and drives the locking frame 1403 to contract. The contraction of the locking frame 1403 drives the guide rod 1402 to slide in the electromagnet 1401 to complete the contraction of the locking assembly. When the baffle door module is closed in place, the spring in the electromagnet 1401 pushes the locking frame 1403 and the top plate 1404 to extend, so that the top plate 1404 is again engaged and locked with the frame 1, thereby achieving the purpose of automatic closing and locking when the smoke refluxes.

[0045] The third implementation method:

[0046] Figure 1-10 Shown.

[0047] On the basis of embodiment one, a sealing strip 19 is fixedly connected to the outer end of the hollow door panel 3, and the sealing strip 19 is made of elastic material. The sealing strip 19 is filled with thermal expansion liquid. A through hole 20 is opened on the top plate 1404, and the sealing strip 19 is connected to the elastic liquid storage bag 17 through the through hole 20.

[0048] A rectangular groove 21 is formed at the outer end of the support frame 14 , and a rectangular block 22 is fixedly connected to the outer end of the locking frame 1403 , and the rectangular groove 21 and the rectangular block 22 are nested for use.

[0049] When the baffle door module is closed in place, the return plate 1302 is blocked by the frame 1, so that the return plate 1302 is closed to a position flush with the hollow door plate 3. When the return plate 1302 is closed, the fan-shaped airbag 18 is compressed, and the compressed gas in the fan-shaped airbag 18 enters the elastic air storage bag 16 through the air pipe. The fan-shaped airbag 18 and the pressurized gas in the elastic air storage bag 16 jointly compress the elastic liquid storage bag 17, so that the thermal expansion liquid stored in the elastic liquid storage bag 17 enters the sealing strip 19, so that the sealing strip 19 expands rapidly and contacts closely with the inner edge of the frame 1 to enhance the sealing. In the case of hot smoke, the thermal expansion liquid in the sealing strip 19 will also absorb heat and expand to further enhance the sealing ability of the sealing strip 19. At the same time, the sealing strip 19 also seals the drive shaft 2 to prevent smoke from leaking to the outside through the drive shaft 2 or corroding the bearings at the rotating part. When the baffle door is opened, the electromagnet 1401 drives the self-locking component to contract, releasing the clamping connection between the top plate 1404 and the frame 1. At this time, the return plate 1302 is opened at a certain angle under the pressure of the elastic air storage bag 16 and the fan-shaped air bag 18, and the gas pressure in the elastic air storage bag 16 and the fan-shaped air bag 18 is released. The elastic liquid storage bag 17 recovers to its initial state under the action of its own elastic force and increases in volume. Part of the thermal expansion liquid in the sealing strip 19 flows back into the elastic liquid storage bag 17, and the sealing strip 19 contracts, thereby reducing the contact area between the sealing strip 19 and the frame 1, reducing the friction between the sealing strip 19 and the inner wall of the frame 1, and extending the service life of the sealing strip 19. The rectangular groove 21 and the rectangular block 22 are nested and can be nested when the self-locking component is contracted. When the self-locking component is extended, the rectangular block 22 can be in close contact with the sealing strip 19 to prevent air leakage in the gap between the locking frame 1403 and the sealing strip 19, thereby ensuring air tightness.

[0050] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A modular smoke damper door, comprising a frame (1), the inner end of the frame (1) being rotatably connected to a damper door module via a drive shaft (2), and the drive shaft (2) passing through the frame (1), characterized in that: The baffle door module comprises a hollow door plate (3) rotatably connected to the outer end of the drive shaft (2); the inner wall of the hollow door plate (3) is fixedly connected to a sleeve (4); the end of the drive shaft (2) close to the sleeve (4) is fixedly connected to a spline shaft (5); the outer end of the spline shaft (5) is provided with a plurality of key grooves (6) distributed in a circumferential array; the inner end of the key groove (6) is clamped with a clamping plate (7); the outer end of the sleeve (4) is fixedly connected to a sliding sleeve (8); the inner wall of the sliding sleeve (8) is slidably connected to the outer end of the clamping plate (7); the end of the clamping plate (7) away from the spline shaft (5) is fixedly connected to a push rod (9); the inner wall of the hollow door plate (3) is fixedly connected to a partition (10); the push rod (9) penetrates the partition (10) and is slidably connected to the partition (10); the outer end of the push rod (9) is fixedly connected to a clamping ring (11); The outer end of the push rod (9) is slidably connected to a return spring (12); one end of the return spring (12) close to the snap ring (11) abuts against the snap ring (11); one end of the return spring (12) away from the snap ring (11) abuts against the partition (10); one end of the push rod (9) away from the snap ring (11) is rotatably connected to a guide link (13) via a pin; one end of the guide link (13) close to the inner wall of the hollow door panel (3) is rotatably connected to the hollow door panel (3) via a pin; one end of the guide link (13) away from the hollow door panel (3) is rotatably connected to an oblique telescopic rod (1301) via a pin; one end of the oblique telescopic rod (1301) away from the guide link (13) is rotatably connected to a return plate (1302) via a pin; the bottom end of the return plate (1302) is rotatably connected to the inner wall of the hollow door panel (3) via a rotating shaft; The two ends of the hollow door panel (3) that are away from each other are fixedly connected to a support frame (14); the inner wall of the support frame (14) is fixedly connected to a self-locking component; the self-locking component comprises an electromagnet (1401) fixedly connected to the inner wall of the support frame (14); the inner end of the electromagnet (1401) is slidably connected to a guide rod (1402); one end of the guide rod (1402) away from the electromagnet (1401) is fixedly connected to a locking frame (1403); the outer end of the locking frame (1403) is slidably connected to the inner wall of the support frame (14); and one end of the locking frame (1403) away from the guide rod (1402) is fixedly connected to a top plate (1404).

2. A modular smoke damper door according to claim 1, characterized in that: The inner wall of the locking frame (1403) is fixedly connected to a fixing plate (15), one end of the fixing plate (15) away from the guide rod (1402) is fixedly connected to an elastic air storage bag (16), one end of the elastic air storage bag (16) away from the guide rod (1402) is fixedly connected to an elastic liquid storage bag (17), and one end of the elastic liquid storage bag (17) away from the fixing plate (15) is fixedly connected to the top plate (1404).

3. A modular smoke damper door according to claim 2, characterized in that: The two ends of the locking frame (1403) close to each other are fixedly connected to a fan-shaped air bag (18) through a fixing block, the bottom end of the fan-shaped air bag (18) is fixedly connected to the outer end of the return plate (1302), and the fan-shaped air bag (18) is connected to the elastic air storage bag (16) through an air pipe.

4. A modular smoke damper door according to claim 1, characterized in that: The outer end of the hollow door panel (3) is fixedly connected with a sealing strip (19), and the sealing strip (19) is made of elastic material. The sealing strip (19) is filled with thermal expansion liquid. A through hole (20) is opened on the top plate (1404), and the sealing strip (19) is connected to the elastic liquid storage bag (17) through the through hole (20).

5. The modular smoke damper door according to claim 1, characterized in that: The outer end of the support frame (14) is provided with a rectangular groove (21), the outer end of the locking frame (1403) is fixedly connected with a rectangular block (22), and the rectangular groove (21) and the rectangular block (22) are nested for use.

6. The modular smoke damper door according to claim 1, characterized in that: A chamfered edge (23) is provided on the crossbeam of the frame (1) corresponding to the position of the guide connecting rod (13).

Images