Smoke damper capable of responding quickly

Abstract

The invention relates to the field of flue accessories, in particular to a flue gas baffle door capable of quickly responding, which is characterized in that through a vent hole formed in a door plate and a plugging block linked with a piston disc, the plugging block is far away from the vent hole when being extruded by flue gas, and a flowing gap of which the flowing area is gradually increased as the plugging block is far away from the vent hole is formed between the plugging block and the vent hole; meanwhile, the spring installed at the end of the piston disc is matched, so that the plugging block moves along with the smoke discharge capacity, the circulation area of the circulation gap is dynamically adjusted, passive response adjustment of the circulation area is achieved, and the situation that a traditional door blocking plate can only be electrically adjusted through a mechanical traction mechanism is replaced; the timeliness of flow area adjustment and the response sensitivity are improved; in addition, through a magnetic ring installed in the piston disc and an electromagnetic coil installed in the shell wall of the piston barrel, the electromagnetic coil is used for driving the magnetic ring and the piston disc on the outer side of the magnetic ring to transversely move in the piston barrel, and faster active response adjustment is achieved.

Description

Technical Field

[0001] The invention relates to a smoke damper, in particular to a smoke damper door capable of quickly responding and applied in the field of flue accessories. Background Art

[0002] Flue gas damper doors are mainly used in the inlet and outlet of the absorption tower, bypass flue, and flue gas denitrification and dust removal systems of flue gas desulfurization systems. They usually adopt a louver-type double-layer damper structure and are equipped with a special sealing device to maintain sealing performance. These damper doors are composed of an external frame, a blade assembly installed on the inside of the frame, and a mechanical transmission mechanism that adjusts the rotation of the blades and controls the airflow. In daily operation, the blades are easily affected by the flue gas airflow and vibrate, and when adjusting the flow rate, especially when adjusting against the wind, the blades will be subjected to a large flue gas squeezing force, which is easy to deform and affect the sealing effect. In order to reduce the equipment load and prevent blade damage, a slow mechanical drive mechanism is usually used, but this may result in a slower response speed and reduced adjustment accuracy for flue gas flow adjustment.

[0003] The existing patent with publication number CN105135455B discloses a smoke damper door, on which a smoke sealing device is provided, and the smoke sealing device enables the damper door with a single-axis single-damper structure to achieve good sealing performance at a low cost. The smoke sealing device includes a hard sealing device and a soft sealing device, so that it is applicable to both rectangular damper doors and circular damper doors, so that the smoke damper door can effectively seal smoke and prevent smoke leakage.

[0004] This existing patent uses a hard sealing device and a soft sealing device to improve the sealing between the blades and reduce the impact of the reduced sealing due to deformation of the blades. However, it does not solve the problem that when the blades rotate to adjust the flow rate, especially against the wind, the load of the mechanical traction device is large and the rotation adjustment speed is slow. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the blades of the existing baffle plate are subjected to large force when adjusting the flow rate and the adjustment response speed and accuracy are insufficient.

[0006] In order to solve the above problems, the present invention provides a door frame, wherein a door panel fixedly connected to the inner wall of the door frame is embedded in the door frame, a vent hole is opened near the edge of the door panel, a blocking block is slidably abutted in the vent hole, and the cross-sections of the blocking block and the vent hole are both vertical isosceles trapezoidal, and when the blocking block and the vent hole are away from each other, the flow gap for smoke flow formed between the inner wall of the vent hole and the blocking block gradually increases;

[0007] The outer ends of the plurality of blocking blocks are movably connected to the same moving plate, a piston rod penetrating the door panel is fixedly connected to the moving plate at the center position of one side of the blocking block, the end of the piston rod extending to the left side of the door panel is fixedly connected to a piston disc, a piston cylinder slidably connected to the piston disc and fixedly connected to the door panel is sleeved on the outer side of the piston disc, a first spring abutting against the right side of the piston disc is nested in the piston cylinder, and when the piston disc is not subjected to other external forces, the first spring makes the piston disc close to the left inner wall of the piston cylinder;

[0008] The piston disc divides the interior of the piston cylinder into two left and right cavities, and a pair of cavities are connected by a connecting pipe fixedly arranged on the outside of the piston cylinder. A solenoid valve is installed on the connecting pipe. The piston cylinder and the connecting pipe are both filled with hydraulic oil. By closing the solenoid valve, the piston disc is fixedly locked by the hydraulic oil filled in the piston cylinder. A magnetic ring is fixedly connected inside the piston disc, and an electromagnetic coil cooperating with the magnetic ring is fixedly connected inside the shell wall of the piston cylinder. The magnetic field generated when the electromagnetic coil is energized pushes the magnetic ring to move laterally.

[0009] In the above-mentioned fast-response smoke damper door, passive response regulation and active response regulation of the flow area are achieved through a piston disk communicated with the blocking block and a piston cylinder equipped with a spring and an electromagnetic coil.

[0010] As a further improvement of the present application, an infrared distance sensor arranged opposite to the piston disk is fixedly connected to the left end of the piston cylinder, and the position of the piston disk in the piston cylinder is monitored in real time by the infrared distance sensor. The electromagnetic coil, solenoid valve and infrared distance sensor are all electrically connected to the controller arranged at the upper end of the door frame.

[0011] As a further improvement of the present application, a mounting rod is fixedly connected to one end of the sealing block facing the piston cylinder, a sealing disk is fixedly connected to the outer end of the mounting rod, and an inner sealing hole cooperating with the sealing disk is opened at the opening of the vent hole facing one end of the piston cylinder.

[0012] As a further improvement of the present application, there are multiple ventilation holes which are equidistantly distributed on the door panel in a circle, and an outer sealing hole is provided on the door panel for the movable plate to be movably embedded, and the outer sealing hole is connected to the ventilation hole.

[0013] As a further improvement of the present application, the movable plate is a vertical disc-shaped structure, and a circularly distributed outer row of holes is opened at its center, and the outer row of holes is distributed between the blocking block and the piston rod.

[0014] As a further improvement of the present application, the piston cylinder is a horizontally arranged hollow cylindrical structure, and a pair of limiting rings arranged on both sides of the piston disk are fixedly connected to the inner wall of the piston cylinder. The inner diameter of the limiting ring is larger than the inner diameter of the first spring, and both ends of the connecting tube are fixedly extended to the inner side of the piston cylinder and are respectively located on the side of the pair of limiting rings away from each other.

[0015] As a further improvement of the present application, a first air pressure sensor and a second air pressure sensor are fixedly connected to the end surfaces of both sides of the door panel, respectively. Both the first air pressure sensor and the second air pressure sensor are electrically connected to the controller, and the gas pressure in the cavities on both sides of the door panel are monitored in real time through the first air pressure sensor and the second air pressure sensor.

[0016] As a further improvement of the present application, the blocking block is rotatably connected to the movable plate, and a fan impeller is fixedly connected to the front end of the blocking disk. When the vent is opened, the smoke drives the fan impeller to rotate, and the fan impeller drives the blocking block to rotate through the blocking disk and the mounting rod. A scraper is provided in the blocking block, which is slidably connected to the blocking block and can be extended to the outside of the blocking block. The scraper scrapes and cleans the dust adhered to the inner wall of the vent as the blocking block rotates.

[0017] As a further improvement of the present application, a telescopic rod fixedly connected to the inner end of the scraper is provided in the blocking block, an inner pin hole is provided on the outer wall of the blocking block on the side opposite to the vent, a first elastic pin which cooperates with the inner pin hole is fixedly connected to the inner wall of the vent, an outer pin hole is provided on the outer wall of the door panel facing the fan impeller, and a second elastic pin which cooperates with the outer pin hole is fixedly connected to the inner side of the fan impeller.

[0018] In summary, the present invention uses a door plate with a vent and a blocking block linked to a piston disk, so that the blocking block moves away from the vent when squeezed by smoke, and a flow gap is formed between the two, the flow area of ​​which gradually increases as the two move away from each other, to meet the needs of different smoke discharge volumes, and at the same time, with the spring installed at the end of the piston disk, the piston disk is acted upon by the spring elastic force and the pressure transmitted to the piston disk by the blocking block due to the air pressure, so that the piston disk moves laterally with the smoke discharge volume, thereby driving the blocking block and the vent to move relative to each other, adjusting the flow area of ​​the flow gap between the two, and realizing passive response adjustment of the flow area, instead of the traditional baffle plate which can only be adjusted by mechanical traction. The structure can electrically adjust the flow area, thereby improving the timeliness of the flow area adjustment and the sensitivity of the response; in addition, by installing a magnetic ring in the piston disc and an electromagnetic coil in the piston cylinder shell wall, the electromagnetic coil is used to drive the magnetic ring and the piston disc outside it to move laterally in the piston cylinder, thereby further improving the movement speed of the piston disc during adjustment and expanding the movement range of the piston disc at a certain flue gas pressure, thereby achieving faster active response adjustment; in addition, by filling the piston cylinder with hydraulic oil, connecting pipes connecting the piston cylinder with the cavities on both sides of the piston disc, and installing an electromagnetic valve on the connecting pipe, when the flow area needs to be fixed, the electromagnetic valve is closed, so that the hydraulic oil limits and locks the piston disc, thereby maintaining the stability of the position of the blocking block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a left-side stereoscopic structural schematic diagram of the present application in the first embodiment;

[0020] Figure 2 This is a schematic cross-sectional structural diagram of the present application in the first embodiment;

[0021] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure of a door panel in the first embodiment of the present application;

[0023] Figure 5 This is a schematic cross-sectional structural diagram of the movable plate and the blocking block in the first embodiment of the present application;

[0024] Figure 6 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 7 This is a schematic diagram of the exploded cross-sectional structure of the piston cylinder in the first embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of the state when the door panel is closed in this application;

[0027] Fig. 9 This is a schematic diagram of the state of the flow area when it is passively responded to and adjusted in this application;

[0028] Fig.10 This is a schematic diagram of the state when the flow area actively responds to adjustment in this application;

[0029] Fig.11 This is a schematic diagram of the state after the sealing disk in this application seals the vent hole;

[0030] Fig.12 It is a schematic cross-sectional structure diagram of the present application in the second embodiment;

[0031] Fig.13 for Fig.12 Schematic diagram of the enlarged structure at C in the middle;

[0032] Fig.14 This is a schematic diagram of the extended state of the scraper in the second embodiment of the present application;

[0033] Fig.15 It is a schematic cross-sectional structure diagram of the first elastic latch in the second embodiment of the present application.

[0034] Description of the numbers in the figure:

[0035] 1. Door frame; 2. Door panel; 201. Air vent; 202. Inner blocking hole; 203. Outer blocking hole; 3. Moving plate; 301. Outer row hole; 302. Outer pin hole; 4. Blocking block; 401. Inner pin hole; 5. Piston rod; 6. Piston disc; 7. Piston cylinder; 701. Limiting ring; 8. First spring; 9. Magnetic ring; 10. Electromagnetic coil; 11. Connecting pipe; 12. Electromagnetic valve; 13. Infrared distance sensor; 14. Controller; 15. Blocking disc; 16. Mounting rod; 17. First air pressure sensor; 18. Second air pressure sensor; 19. Fan impeller; 20. Scraper; 21. Telescopic rod; 22. First elastic latch; 2201. Guide rod; 2202. Sliding cylinder; 2203. Second spring; 23. Second elastic latch; 24. Fixed column; 25. Bearing. DETAILED DESCRIPTION

[0036] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] Figure 1-10 A fast-response smoke damper door is shown, comprising a door frame 1; a door panel 2 fixedly connected to the inner wall of the door frame 1 is nested in the door frame 1, a vent hole 201 is opened near the edge of the door panel 2, a blocking block 4 is slidably abutted in the vent hole 201, and the cross-sections of the blocking block 4 and the vent hole 201 are both vertical isosceles trapezoidal shapes, and when the blocking block 4 and the vent hole 201 are away from each other, the flow gap for smoke flow formed between the inner wall of the vent hole 201 and the blocking block 4 gradually increases;

[0039] The outer ends of the plurality of blocking blocks 4 are movably connected to the same movable plate 3, and the movable plate 3 is fixedly connected to a piston rod 5 that penetrates the door panel 2 toward the center position of one side of the blocking block 4, and the piston rod 5 extends to the end on the left side of the door panel 2 and is fixedly connected to a piston disc 6, and a piston cylinder 7 that is slidably connected to the piston disc 6 and fixedly connected to the door panel 2 is sleeved on the outer side of the piston disc 6, and a first spring 8 that abuts against the right side of the piston disc 6 is nested in the piston cylinder 7, and when the piston disc 6 is not subjected to other external forces, the first spring 8 makes the piston disc 6 be located on the left side of the piston cylinder 7; the piston disc 6 divides the interior of the piston cylinder 7 into two left and right cavities, and a pair of cavities are connected by a connecting pipe 11 fixedly arranged on the outer side of the piston cylinder 7, and a solenoid valve 12 is installed on the connecting pipe 11, and the piston cylinder 7 and the connecting pipe 11 are both filled with hydraulic oil, and the piston disc 6 is fixedly locked by the hydraulic oil filled in the piston cylinder 7 by closing the solenoid valve 12;

[0040] A magnetic ring 9 is fixedly connected inside the piston disc 6, and an electromagnetic coil 10 cooperating with the magnetic ring 9 is fixedly connected inside the shell wall of the piston cylinder 7. When the electromagnetic coil 10 is started and the electromagnetic valve 12 is opened, the magnetic field generated by the electromagnetic coil 10 after being energized pushes the magnetic ring 9 to move laterally, and the magnetic ring 9 drives the piston disc 6 to move laterally in the piston cylinder 7. The piston disc 6 drives the moving plate 3 to move laterally through the piston rod 5, and the moving plate 3 drives the blocking block 4 to move closer to or away from the vent 201, thereby adjusting the size of the flow gap between the blocking block 4 and the vent 201.

[0041] Specifically, when in use, the device is installed between two sections of pipes and the piston cylinder 7 of the device is facing the air inlet end;

[0042] When it is necessary to keep the duct closed so that smoke cannot circulate, refer to Figure 8 , close the electromagnetic coil 10 and the electromagnetic valve 12. At this time, the hydraulic oil in the piston cylinder 7 and the connecting pipe 11 cannot flow, the piston disc 6 is fixed and locked, the piston disc 6 fixes the movable plate 3 through the piston rod 5, and the movable plate 3 restricts the blocking block 4 in the vent hole 201. No smoke flows from the left cavity of the door panel 2 to the right cavity of the door panel 2 through the vent hole 201;

[0043] When you need to adjust the size of the flow gap to adapt to the exhaust volume of different flue gases, please refer to Fig. 9 , open the solenoid valve 12, at this time, the cavities on both sides of the piston cylinder 7 on the piston disc 6 are connected through the connecting pipe 11, and the flowing smoke pushes the blocking block 4 to move to the right, so that a flow gap is formed between the blocking block 4 and the vent 201 and opens, and the smoke flows from the cavity on the left side of the door panel 2 of the door frame 1 to the cavity on the right side of the door panel 2 through the flow gap, so that the smoke is discharged; in the process of the blocking block 4 moving to the right, the blocking block 4 drives the piston rod 5 to move to the right through the moving plate 3, and the piston rod 5 drives the piston disc 6 to move to the right in the piston cylinder 7, and the hydraulic oil in the piston cylinder 7 flows from the cavity on the right side of the piston disc 6 through the connecting pipe 11 into the cavity on the left side of the piston disc 6 under the squeezing and pushing of the piston disc 6, and the first spring 8 is compressed to the right, and when the elastic force of the first spring 8 on the piston disc 6 is equal to the pressure of the air pressure on the blocking block 4, the blocking block 4 and the piston disc 6 stop moving;

[0044] At this time, if the smoke exhaust volume increases, please refer to Fig. 9 When the pressure of the flue gas on the blocking block 4 is greater than the elastic force of the first spring 8 on the piston disc 6, the blocking block 4 and the piston disc 6 continue to move rightward, the flow gap expands, and the flow area increases. Similarly, when the flue gas discharge volume decreases and the pressure of the flue gas on the blocking block 4 is less than the elastic force of the first spring 8 on the piston disc 6, the blocking block 4 and the piston disc 6 move leftward, the flow gap shrinks, and the flow area decreases, thereby realizing the passive response adjustment of the flow gap flow area with the fluctuation of the flue gas discharge volume;

[0045] If further adjustment of the flow gap area is required, refer to Fig.10 , start the electromagnetic coil 10, the electromagnetic coil 10 is energized to generate a magnetic field to push the magnetic ring 9 in the piston disc 6 to move laterally, and the piston disc 6 drives the blocking block 4 to move laterally through the piston rod 5 and the moving plate 3, so as to achieve a faster adjustment speed and further adjust the flow area of ​​the flow gap, and realize active response adjustment; it should be particularly noted that by changing the current size and current direction passing through the electromagnetic coil 10, the driving direction and driving force size of the magnetic force on the magnetic ring 9 are changed;

[0046] When the flow area of ​​the current flow gap needs to be maintained, the solenoid valve 12 is started to close, thereby locking and fixing the piston disc 6 and the blocking block 4 .

[0047] Compared with the traditional smoke damper plate, the present invention uses a door plate 2 with a vent 201 and a piston disk 6 linked to the blocking block 4, so that the blocking block 4 moves away from the vent 201 when squeezed by smoke, and a flow gap is formed between the two, the flow area of ​​which gradually increases as the two move away from each other, to meet the needs of different smoke discharge volumes. At the same time, in conjunction with the first spring 8 installed at the end of the piston disk 6, the piston disk 6 is acted upon by the elastic force of the first spring 8 and the pressure transmitted to the piston disk 6 by the blocking block 4 due to the air pressure, so that the piston disk 6 moves laterally with the smoke discharge volume, thereby driving the blocking block 4 and the vent 201 to move relative to each other, adjusting the flow area of ​​the flow gap between the two, and realizing passive response adjustment of the flow area, instead of the traditional damper plate which can only be adjusted mechanically The traction mechanism performs electric adjustment of the flow area, thereby improving the timeliness of the flow area adjustment and the sensitivity of the response; in addition, by installing a magnetic ring 9 in the piston disc 6 and an electromagnetic coil 10 in the shell wall of the piston cylinder 7, the electromagnetic coil 10 is used to drive the magnetic ring 9 and the piston disc 6 on its outer side to move laterally in the piston cylinder 7, thereby further improving the movement speed of the piston disc 6 during adjustment and expanding the movement range of the piston disc 6 at a certain flue gas pressure, thereby achieving faster active response adjustment; in addition, by filling the piston cylinder 7 with hydraulic oil, connecting the piston cylinder 7 with the cavities on both sides of the piston disc 6, and installing the electromagnetic valve 12 on the connecting pipe 11, when the flow area needs to be fixed, the electromagnetic valve 12 is closed, so that the hydraulic oil limits and locks the piston disc 6, thereby maintaining the stability of the position of the blocking block 4.

[0048] See also Figure 1 and Figure 2 The door frame 1 is a cylindrical structure with openings at both ends, and mounting flanges are provided at the openings at both ends of the door frame 1.

[0049] Specifically, the door baffle plate can be conveniently installed on the pipeline through the installation flanges on both sides of the door frame 1, so as to achieve rapid installation and connection.

[0050] See also Figure 3 and Figure 4 There are multiple vent holes 201 which are equidistantly distributed on the door panel 2 in a circle. The door panel 2 is provided with an outer sealing hole 203 for the movable plate 3 to be movably embedded in. The outer sealing hole 203 is connected to the vent holes 201 .

[0051] Specifically, the overall flow area is increased by providing a plurality of circumferentially equidistantly distributed ventilation holes 201, and the adjustment accuracy of the flow area of ​​the flow gap is increased by correspondingly increasing the number of blocking blocks 4; and by providing an external blocking hole 203 that cooperates with the movable plate 3, the movable plate 3 and the blocking block 4 cooperate with each other to perform two-stage sealing of the ventilation hole 201, thereby improving the effect of sealing and isolating the smoke.

[0052] See also Figure 5 and Fig. 9 The movable plate 3 is a vertical disc-shaped structure, and a circularly distributed outer row of holes 301 is opened at its center, and the outer row of holes 301 is arranged between the blocking block 4 and the piston rod 5.

[0053] Specifically, when the smoke is conducted, the smoke flowing out of the flow gap can flow into the right cavity through the channel on the upper side of the movable plate 3, or flow out from the middle of the movable plate 3 to the right cavity through the outer discharge hole 301, thereby reducing the smoke pressure on the movable plate 3 when the smoke is conducted, and facilitating the movable plate 3 to follow the movement of the piston rod 5 during adjustment.

[0054] See also Figure 6 and Figure 7 The piston cylinder 7 is a horizontally arranged hollow cylindrical structure. A pair of limiting rings 701 arranged on both sides of the piston disc 6 are fixedly connected to the inner wall of the piston cylinder 7. The inner diameter of the limiting ring 701 is larger than the inner diameter of the first spring 8. Both ends of the connecting pipe 11 are fixedly extended to the inner side of the piston cylinder 7 and are respectively located on the side where the pair of limiting rings 701 are away from each other.

[0055] Specifically, the limit ring 701 disposed in the piston cylinder 7 limits the lateral movement range of the piston disc 6, thereby reducing excessive squeezing of the first spring 8 by the piston disc 6 and reducing blockage of the connecting holes of the connecting pipe 11 and the piston cylinder 7.

[0056] Second implementation method:

[0057] Figure 2-7 and Figure 11-15 A fast-responding smoke damper door is shown. On the basis of the first embodiment, an infrared distance sensor 13 arranged opposite to the piston disc 6 is fixedly connected to the left end of the piston cylinder 7. The position of the piston disc 6 in the piston cylinder 7 is monitored in real time by the infrared distance sensor 13. The electromagnetic coil 10, the electromagnetic valve 12 and the infrared distance sensor 13 are all electrically connected to a controller 14 arranged at the upper end of the door frame 1.

[0058] Specifically, the position of the piston disk 6 in the piston cylinder 7 is monitored in real time through the infrared distance sensor 13, and the piston disk 6 is rigidly connected to the blocking block 4 through the piston rod 5 and the movable plate 3, thereby realizing the monitoring of the position of the blocking block 4, and facilitating the control of the position of the blocking block 4 through the controller 14, thereby controlling the opening size of the flow gap and accurately controlling the flow area; it should be particularly noted that the controller 14 is a digital display controller to improve the control convenience.

[0059] See also Figure 3-5 The end of the blocking block 4 facing the piston cylinder 7 is fixedly connected with a mounting rod 16, the outer end of the mounting rod 16 is fixedly connected with a blocking disk 15, and an inner blocking hole 202 cooperating with the blocking disk 15 is opened at the opening of the vent hole 201 facing the end of the piston cylinder 7.

[0060] Specifically, when the pressure difference between the cavities of the door frame 1 on both sides of the door panel 2 is large and the vent hole 201 needs to be blocked, please refer to Fig.11 , open the solenoid valve 12, and use the left flue gas to push the blocking block 4 and the piston disk 6 to move to the right, so that the blocking disk 15 is nested in the inner blocking hole 202, to achieve the blocking of the vent 201, instead of using the electromagnetic coil 10 to drive the magnetic ring 9 and the piston disk 6 to move left, so that the blocking block 4 moves left to block the vent 201 against the wind, thereby reducing the gas resistance of blocking the vent 201, reducing energy consumption, and improving the closing response speed; and when the pressure difference between the left and right cavities of the door panel 2 is large, to open the vent 201, it is only necessary to start the electromagnetic coil 10 to drive the piston disk 6 to move a small distance to the left to achieve the opening of the vent 201, and the flow area of ​​the vent 201 is adjusted after the pressure in the left cavity gradually decreases, thereby reducing the difficulty of opening the vent 201 against the wind and saving electric energy.

[0061] See also Figure 3 and Fig.11 The blocking disk 15 is a vertical disc-shaped structure, the inner blocking hole 202 is a columnar hole with a diameter larger than the inner diameter of the left opening of the vent hole 201 , and the inner blocking hole 202 is connected to the vent hole 201 .

[0062] Specifically, by moving the blocking disk 15 into the inner blocking hole 202, the left opening of the vent hole 201 is blocked in a stepped manner to improve the sealing effect.

[0063] See also Figure 2 and Fig.11 The first air pressure sensor 17 and the second air pressure sensor 18 are fixedly connected to the end surfaces of both sides of the door panel 2, and both the first air pressure sensor 17 and the second air pressure sensor 18 are electrically connected to the controller 14. The first air pressure sensor 17 and the second air pressure sensor 18 are used to monitor the gas pressure in the cavities on both sides of the door panel 2 in real time.

[0064] Specifically, the gas pressure in the cavities on both sides of the door panel 2 is monitored in real time through the first air pressure sensor 17 and the second air pressure sensor 18. When the pressure difference on both sides is large, the controller 14 chooses to open the solenoid valve 12, and adopts a blocking strategy for the vent 201 through the sealing plate 15. When the pressure difference on both sides is small, the controller 14 chooses to start the electromagnetic coil 10 to drive the piston plate 6 to move to the left, and adopts a strategy to block the vent 201 through the sealing block 4. In addition, when the air pressure in the cavity on the right side of the door panel 2 is greater than the air pressure in the cavity on the left side, and smoke backflow is likely to occur, the controller 14 controls the sealing block 4 to block the vent 201 to reduce smoke backflow.

[0065] See also Fig.12 and Fig.13 The blocking block 4 is rotatably connected to the movable plate 3, and a fan impeller 19 is fixedly connected to the front end of the blocking disk 15. When the vent 201 is opened, the smoke pushes the fan impeller 19 to rotate, and the fan impeller 19 drives the blocking block 4 to rotate through the blocking disk 15 and the mounting rod 16; a scraper 20 is provided in the blocking block 4, which is slidably connected to the blocking block 4 and can be extended to the outside of the blocking block 4. The scraper 20 scrapes and cleans the dust adhered to the inner wall of the vent 201 as the blocking block 4 rotates.

[0066] See also Fig.13 A telescopic rod 21 fixedly connected to the inner end of the scraper 20 is provided in the blocking block 4, an inner pin hole 401 is provided on the outer wall of the blocking block 4 on the side opposite to the vent 201, a first elastic latch 22 matched with the inner pin hole 401 is fixedly connected to the inner wall of the vent 201, an outer pin hole 302 is provided on the outer wall of the door panel 2 facing the fan impeller 19, and a second elastic latch 23 matched with the outer pin hole 302 is fixedly connected to the inner side of the fan impeller 19.

[0067] Specifically, when the rotating blocking block 4 approaches the inner wall of the vent hole 201, the blocking block 4 is locked and fixed after the first elastic pin 22 is inserted into the inner pin hole 401; when the blocking disk 15 rotates and approaches the outer blocking hole 203, the blocking disk 15 is locked and fixed after the second elastic pin 23 is inserted into the outer pin hole 302, thereby stopping the blocking block 4 from rotating.

[0068] Compared with the traditional smoke damper door plate, the present invention has a rotatable blocking block 4 set on the movable plate 3 and a scraper 20 set in the blocking block 4 and able to extend to contact the inner wall of the vent 201. During ventilation, the dust adhering to the inner wall of the vent 201 can be scraped off by rotation, thereby reducing the influence of the residual dust in the vent 201 on the sealing of the door plate 2 and improving the sealing effect. At the same time, the combination of the blocking block 4 and the blocking disk 15 is fixed and locked by the first elastic pin 22 and the second elastic pin 23, thereby improving the stability of the blocking block 4 and the blocking disk 15 during sealing.

[0069] See also Fig.14 and Fig.15 The telescopic rod 21 is a sleeve-type structure and includes a fixed tube and a sliding rod slidably connected to the fixed tube, the fixed tube is fixedly connected to the blocking block 4, and the sliding rod is fixedly connected to the inner end of the scraper 20; the first elastic pin 22 includes a guide rod 2201 and a sliding tube 2202 slidably sleeved therewith, and a second spring 2203 abutting against the front end of the guide rod 2201 is provided in the sliding tube 2202, and the second elastic pin 23 has the same structure as the first elastic pin 22.

[0070] Specifically, when the blocking block 4 rotates, the scraper 20 is extended to the outside of the blocking block 4 due to the centrifugal force, and the sliding rod slides along the fixed cylinder to limit the extension length of the scraper 20; through the first elastic pin 22 and the second elastic pin 23 including the guide rod 2201, the sliding cylinder 2202 and the second spring 2203, the rotating blocking block 4 and the blocking disk 15 can be inserted by the first elastic pin 22 and the second elastic pin 23 respectively, so as to realize the fixed locking of the blocking block 4 and the blocking disk 15.

[0071] See also Fig.13 A fixed column 24 extending into the blocking block 4 is fixedly connected to the movable plate 3 , and a bearing 25 is rotatably connected to the fixed column 24 , and the bearing 25 is fixedly connected to the blocking block 4 .

[0072] Specifically, the blocking block 4 is rotatably connected to the movable plate 3 through the fixed column 24 and the bearing 25 .

[0073] 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 fast-response smoke damper door, characterized in that: The invention comprises a door frame (1); a door panel (2) fixedly connected to the inner wall of the door frame (1) is nested inside the door frame (1); a vent hole (201) is provided on the door panel (2) near its edge; a blocking block (4) is slidably abutted inside the vent hole (201); the blocking block (4) and the vent hole (201) both have vertical isosceles trapezoidal cross sections; when the blocking block (4) and the vent hole (201) move away from each other, a flow gap for smoke flow formed between the inner wall of the vent hole (201) and the blocking block (4) gradually increases; The outer ends of the plurality of blocking blocks (4) are movably connected to the same movable plate (3); the movable plate (3) is fixedly connected to a piston rod (5) penetrating the door panel (2) at a central position of the blocking block (4); the end of the piston rod (5) extending to the left side of the door panel (2) is fixedly connected to a piston plate (6); a piston cylinder (7) which is slidably connected to the piston cylinder (6) and fixedly connected to the door panel (2) is sleeved on the outer side of the piston plate (6); a first spring (8) which is in contact with the right side of the piston plate (6) is nested in the piston cylinder (7); when the piston plate (6) is not subjected to other external forces, the first spring (8) causes the piston plate (6) to approach the left inner wall of the piston cylinder (7); The piston disc (6) divides the interior of the piston cylinder (7) into two left and right cavities, and the pair of cavities are connected via a connecting pipe (11) fixedly arranged on the outside of the piston cylinder (7), and a solenoid valve (12) is installed on the connecting pipe (11). The piston cylinder (7) and the connecting pipe (11) are both filled with hydraulic oil. By closing the solenoid valve (12), the piston disc (6) is fixedly locked by the hydraulic oil filled in the piston cylinder (7); a magnetic ring (9) is fixedly connected inside the piston disc (6), and an electromagnetic coil (10) matched with the magnetic ring (9) is fixedly connected inside the shell wall of the piston cylinder (7). The magnetic field generated by the electromagnetic coil (10) after being energized pushes the magnetic ring (9) to move laterally.

2. A fast-response smoke damper door according to claim 1, characterized in that: The left end of the piston cylinder (7) is fixedly connected to an infrared distance sensor (13) arranged opposite to the piston disc (6), and the position of the piston disc (6) in the piston cylinder (7) is monitored in real time by the infrared distance sensor (13). The electromagnetic coil (10), the electromagnetic valve (12) and the infrared distance sensor (13) are all electrically connected to a controller (14) arranged at the upper end of the door frame (1).

3. The fast-response smoke damper door according to claim 2, characterized in that: The sealing block (4) is fixedly connected to one end facing the piston cylinder (7) with a mounting rod (16), and the outer end of the mounting rod (16) is fixedly connected to a sealing disk (15). An inner sealing hole (202) cooperating with the sealing disk (15) is provided at the opening of the vent hole (201) facing one end of the piston cylinder (7).

4. The fast-response smoke damper door according to claim 3, characterized in that: The ventilation holes (201) are multiple in number and are equidistantly distributed on the door panel (2) in a circular pattern. The door panel (2) is provided with an outer sealing hole (203) for the movable plate (3) to be movably embedded therein, and the outer sealing hole (203) is communicated with the ventilation holes (201).

5. The fast-response smoke damper door according to claim 4, characterized in that: The movable plate (3) is a vertical disc-shaped structure, and a plurality of outer holes (301) distributed in a circumferential manner are opened at the center thereof. The outer holes (301) are distributed between the blocking block (4) and the piston rod (5).

6. The fast-response smoke damper door according to claim 1, characterized in that: The piston cylinder (7) is a horizontally arranged hollow cylindrical structure. A pair of limiting rings (701) arranged on both sides of the piston disc (6) are fixedly connected to the inner wall of the piston cylinder (7). The inner diameter of the limiting ring (701) is larger than the inner diameter of the first spring (8). Both ends of the connecting pipe (11) are fixedly extended to the inner side of the piston cylinder (7) and are respectively located on the side of the pair of limiting rings (701) that are away from each other.

7. The fast-response smoke damper door according to claim 4, characterized in that: The end surfaces on both sides of the door panel (2) are respectively fixedly connected with a first air pressure sensor (17) and a second air pressure sensor (18); both the first air pressure sensor (17) and the second air pressure sensor (18) are electrically connected to the controller (14); and the air pressure of the cavities on both sides of the door panel (2) is monitored in real time through the first air pressure sensor (17) and the second air pressure sensor (18).

8. The fast-response smoke damper door according to claim 4, characterized in that: The blocking block (4) is rotatably connected to the movable plate (3); a fan impeller (19) is fixedly connected to the front end of the blocking disk (15); when the vent (201) is opened, smoke pushes the fan impeller (19) to rotate, and the fan impeller (19) drives the blocking block (4) to rotate through the blocking disk (15) and the mounting rod (16); a scraper (20) is provided inside the blocking block (4) and is slidably connected to the blocking block (4) and can extend to the outside of the blocking block (4); the scraper (20) scrapes and cleans the dust adhering to the inner wall of the vent (201) as the blocking block (4) rotates.

9. The fast-response smoke damper door according to claim 8, characterized in that: The blocking block (4) is provided with a telescopic rod (21) fixedly connected to the inner end of the scraper (20); an inner pin hole (401) is provided on the outer wall of the blocking block (4) on the side opposite to the vent hole (201); a first elastic latch (22) matching the inner pin hole (401) is fixedly connected to the inner wall of the vent hole (201); an outer pin hole (302) is provided on the outer wall of the door panel (2) on the side facing the fan impeller (19); a second elastic latch (23) matching the outer pin hole (302) is fixedly connected to the inner side of the fan impeller (19).

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