Fireproof valve with analog quantity signal control

Abstract

The invention discloses a fireproof valve with analog quantity signal control, which belongs to the technical field of fireproof valves and comprises a valve body shell, a plurality of valve plates are rotatably connected in the valve body shell, transmission mechanisms are rotatably connected in the valve plates, and auxiliary sealing plates are arranged in the valve plates in a sliding fit manner. A valve plate cleaning frame is arranged on the inner wall of the upper side of the valve body shell in a sliding fit mode, a transmission rod is rotatably connected to the inner wall of one side of the valve body shell, a secondary cleaning mechanism is arranged on the inner wall of the bottom side of the valve body shell in a sliding fit mode, and a pipeline connecting end is fixedly arranged at one end of the valve body shell. Under the driving of the transmission mechanism, the auxiliary sealing plate is blocked at the contact position of the two valve plates, so that further sealing is realized, a single sealing mode is avoided, the overall sealing performance is improved, the leakage risk is reduced, and the special environment of an oil smoke pipeline can be effectively handled.

Description

Technical Field

[0001] The invention belongs to the technical field of fire dampers, and in particular relates to a fire damper with analog signal control. Background Art

[0002] Fire dampers are an important device used in building fire protection systems. They are mainly used to prevent the spread of fire in the event of a fire, protect the safety of the building and the lives and property of personnel. The working principle, types and installation requirements of fire dampers are as follows: Fire dampers are usually connected to the building's ventilation and air-conditioning systems. When a fire occurs, the fire dampers can be closed automatically or manually to cut off the flame and smoke transmission channels. Fire dampers are filled with fireproof materials and can remain sealed under high temperature conditions to prevent the spread of fire.

[0003] Types: Automatic fire damper: When the temperature reaches a certain level, the valve closes automatically, usually controlled by a thermal element, Manual fire damper: Opened and closed manually, suitable for specific occasions, Electric fire damper: Uses an electric device to control the switch, usually linked to a fire alarm system, Smoke exhaust fire damper: Specially used to exhaust smoke in case of fire, usually installed in stairwells and corridors of high-rise buildings.

[0004] Installation Requirements Installation location: Fire dampers are usually installed at key locations such as the intersection of air ducts, the bottom of vertical air ducts and vents. Keep it unobstructed: Keep enough space around the fire damper for easy maintenance and inspection. Regular inspection: Fire dampers need to be functionally tested regularly to ensure that they can work normally in the event of a fire. Compliance with standards: The fire dampers installed and used must comply with national or regional fire safety standards and regulations.

[0005] Maintenance and Inspection Regular inspection: ensure that the valve switches flexibly and has good sealing. Cleaning and maintenance: regularly remove dust and debris around the valve to ensure its normal operation. Functional test: simulate the operation under fire conditions to ensure that the automatic or manual closing function is normal.

[0006] Fire dampers play a key role in safety protection in modern buildings, so reasonable selection, installation and maintenance are essential to ensure life safety and property safety. At present, with the continuous increase of various new types of buildings, the ventilation ducts of the building's ventilation and air-conditioning systems or the pipes of the mechanical smoke exhaust system need to be equipped with a large number of fire dampers and air volume regulating valves. Fire dampers and air volume regulating valves play an important role in the application of ventilation ducts or mechanical smoke exhaust systems. Traditional fire dampers and air volume regulating valves are independent components in the ventilation ducts or mechanical smoke exhaust system pipes, which has high manufacturing costs and complex control methods. The independent side-by-side installation is cumbersome, and the resistance of the air in the pipeline is increased.

[0007] Some invention patents in the field of fire damper technology are disclosed in the prior art. Among them, the invention patent with application number CN201911371072.6 discloses a fire damper. The overlapping part of the blades of the invention is provided with a sealing sheet made of metal foil. When it needs to be closed, the free end is flipped toward the fixed end by air pressure and tightly attached to the other blade. In this way, the sealing is completed, the sealing effect is better, and the metal can also withstand relatively high temperatures.

[0008] The prior art seals by contacting each other with sealing sheets during use, and the sealing method is relatively simple. When the fire damper is used for the oil fume duct, the oil fume in the oil fume duct will adhere to the sealing sheet to form an oil layer, thereby affecting the sealing effect and possibly causing the valve to fail to be completely sealed when closed.

[0009] Based on this, the present invention designs a fire damper with analog signal control to solve the above problems. Summary of the invention

[0010] The purpose of the present invention is to solve the problem that the prior art uses sealing plates to contact each other for sealing during use, and the sealing method is relatively simple. When the fire damper is used for an oil fume duct, the oil fume in the oil fume duct will adhere to the sealing plate to form an oil layer, thereby affecting the sealing effect and possibly causing the valve to fail to be completely sealed when closed. A fire damper with analog signal control is proposed.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions: A fire damper with analog signal control comprises a valve body shell, a plurality of valve plates are rotatably connectedly arranged in the valve body shell, a transmission mechanism is rotatably arranged in the valve plates, an auxiliary sealing plate is slidably arranged in the valve plates, a valve plate cleaning rack is slidably arranged on the upper inner wall of the valve body shell, a transmission rod is rotatably arranged on the inner wall of one side of the valve body shell, a secondary cleaning mechanism is slidably arranged on the inner wall of the bottom side of the valve body shell, and a pipeline connection end is fixedly installed at one end of the valve body shell.

[0012] As a further description of the above technical solution: A cylinder is fixedly connected to the inner wall of the upper side of the valve body shell, an opening and closing rack is fixedly connected to the output end of the cylinder, and a plurality of T-shaped mounting holes are opened on one side of the valve body shell.

[0013] As a further description of the above technical solution: A rotating shaft is fixedly connected to the top of the valve plate, and the rotating shaft is rotatably connected to the inner wall of the upper side of the valve body shell. An opening and closing wheel is fixedly connected to the rotating shaft, and the opening and closing wheel is meshed with an opening and closing rack for transmission.

[0014] As a further description of the above technical solution: The transmission mechanism includes a worm, which is rotatably connected to the inner wall of the valve plate. One end of the worm extends through the inner wall of the rotating shaft to the outside and is fixedly connected to a universal joint. The other end of the universal joint is rotatably connected to the rotating shaft. One end of the universal joint is fixedly connected to a transmission wheel. One side of the transmission wheel is meshingly provided with an arc-shaped rack, and the arc-shaped rack is fixedly connected to the inner wall of the valve body shell.

[0015] As a further description of the above technical solution: A worm wheel is meshingly provided on one side of the worm, the worm wheel is rotatably connected to the inner wall of the valve plate, and a ball head rod is fixedly connected to one end of the worm wheel.

[0016] As a further description of the above technical solution: A U-shaped rod is fixedly connected to one end of the auxiliary sealing plate, a sliding frame is slidably provided on the U-shaped rod, a plurality of tension springs A are fixedly connected to the U-shaped rod, the other end of the tension spring A is fixedly connected to the inner wall of the sliding frame, the sliding frame is slidably provided with the inner wall of the valve plate, a sliding groove rod is fixedly connected to one end of the sliding frame, and the inner wall of the sliding groove rod is slidably provided with the outer wall of the ball head rod.

[0017] As a further description of the above technical solution: The valve plate cleaning rack is arranged in sliding contact with the outer wall of one end of the valve plate, and a guide head rack is fixedly connected to one end of the valve plate cleaning rack. The guide head rack is slidingly matched with the outer wall of the transmission rod, and a connecting rod group is rotatably connected to the valve plate cleaning rack, and a motor is fixedly connected to the other end of the connecting rod group, and the motor is fixedly connected to the inner wall of the valve body shell.

[0018] As a further description of the above technical solution: The transmission rod is provided with a guide groove, the inner wall of the guide groove is slidably matched with the guide head frame, and the bottom end of the transmission rod is connected and fixedly provided with a push rod.

[0019] As a further description of the above technical solution: The secondary cleaning mechanism includes a sliding frame, which is slidably matched with the inner wall of the bottom end of the valve body shell, a plurality of springs A are connected and fixedly arranged on one side of the sliding frame, and the other end of the spring A is connected and fixedly arranged on the inner wall of the bottom end of the valve body shell. The outer wall of one side of the sliding frame is slidably contacted with the outer wall of the push rod, and a scraper plate is slidably matched inside the sliding frame, and the scraper plate is slidably contacted with the bottom end of the valve plate cleaning frame. A plurality of springs B are connected and fixedly arranged on the bottom end of the scraper plate, and the other end of the spring B is connected and fixedly arranged on the inner wall of the sliding frame.

[0020] As a further description of the above technical solution: A plurality of plug-in rods are fixedly provided at one end of the pipe connection end, a mounting block is slidably provided through the inner wall of the plug-in rod, the mounting block and the plug-in rod are movably connected with the T-shaped mounting hole, a tension spring B is fixedly provided between the mounting block and the inner wall of the plug-in rod, a contact rod is fixedly provided at one end of the mounting block, a raised ring is rotatably provided inside the pipe connection end, the raised part on the inner side of the raised ring is in sliding contact with the outer wall of the contact rod, and a rubber pad is fixedly provided at one side of the pipe connection end.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by providing an auxiliary sealing plate, when the valve plate of the fire damper is closed, the auxiliary sealing plate can be blocked at the contact position of the two valve plates under the drive of the transmission mechanism, thereby achieving further sealing and avoiding a single sealing method, thereby improving the overall sealing performance, reducing the risk of leakage, and being able to effectively cope with the special environment of the oil fume duct.

[0022] 2. In the present invention, by setting up a valve plate cleaning rack, the oil stains and other dirt attached to one end of the valve plate can be cleaned, and the scraper plate can be used to clean the oil stains on the valve plate cleaning rack, thereby ensuring the cleaning effect of the valve plate cleaning rack and effectively cleaning the oil stains on the valve plate of the fire damper, thereby improving the sealing performance and service life of the valve.

[0023] 3. In the present invention, by providing a detachable pipe connection end, the fire damper can be installed and used on pipes of different sizes to meet the needs of different buildings and equipment, thereby enhancing the versatility of the product. This not only improves the applicability of the fire damper, but also simplifies the installation and maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of a fire damper with analog signal control proposed by the present invention when one side is opened for cleaning; Figure 2 This is a schematic diagram of the other side of the overall structure of a fire damper with analog signal control proposed by the present invention when it is closed; Figure 3 A partial cross-sectional expansion diagram of the valve body shell and other structures of a fire damper with analog signal control proposed by the present invention; Figure 4 A schematic cross-sectional view of a transmission mechanism and a valve plate structure of a fire damper with analog signal control proposed by the present invention; Figure 5 This is a schematic diagram of the structure of an auxiliary sealing plate of a fire damper with analog signal control proposed by the present invention; Figure 6This is a schematic diagram of the valve plate cleaning frame and transmission rod structure of a fire damper with analog signal control proposed by the present invention; Figure 7 This is a schematic diagram of the expanded structure of a secondary cleaning mechanism of a fire damper with analog signal control proposed by the present invention; Figure 8 This is a partial sectional expansion schematic diagram of the pipe connection end structure of a fire damper with analog signal control proposed by the present invention.

[0025] Legend: 1. Valve body shell; 2. Valve plate; 3. Transmission mechanism; 4. Auxiliary sealing plate; 5. Valve plate cleaning rack; 6. Transmission rod; 7. Secondary cleaning mechanism; 8. Pipe connection end; 101. Cylinder; 102. Opening and closing rack; 103. T-shaped mounting hole; 201. Rotating shaft; 202. Opening and closing wheel; 301. Worm; 302. Universal joint; 303. Transmission wheel; 304. Arc rack; 305. Worm wheel; 306. Ball Head rod; 401, U-shaped rod; 402, sliding frame; 403, tension spring A; 404, sliding groove rod; 501, guide head frame; 502, connecting rod group; 503, motor; 601, guide groove; 602, push rod; 701, sliding frame; 702, spring A; 703, scraper plate; 704, spring B; 801, plug-in rod; 802, mounting block; 803, tension spring B; 804, contact rod; 805, raised ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Please see attached Figure 1 -Attached Figure 8The present invention provides a technical solution: a fire damper with analog signal control, comprising a valve body shell 1, a plurality of valve plates 2 are rotatably connected and arranged in the valve body shell 1, a transmission mechanism 3 is rotatably connected and arranged in the valve plate 2, an auxiliary sealing plate 4 is slidably arranged in the valve plate 2, a valve plate cleaning frame 5 is slidably arranged on the upper inner wall of the valve body shell 1, a transmission rod 6 is rotatably connected and arranged on the inner wall of one side of the valve body shell 1, a secondary cleaning mechanism 7 is slidably arranged on the inner wall of the bottom side of the valve body shell 1, and a pipeline connection end 8 is fixedly installed at one end of the valve body shell 1. The valve body shell 1 can accurately control the flow rate in the pipeline by the opening of the fire damper valve plate 2 through the analog signal, effectively reduce the ventilation resistance in the pipeline, and meet the requirements of fire protection regulations. At the same time, the fire damper can be accurately controlled by analog signal control. The actuator of the device can input analog signal to control the position of the valve plate 2 and accurately adjust the flow rate in the pipeline. The analog signal can be 0 (2)-10 VDC or 0 (4)-20 m A control, the opening information of the fire damper valve plate 2 can be converted into an analog signal output. A temperature sensor is installed in the valve body shell 1 of the device to realize the device with 70°C or 280°C temperature sensing control, and the control valve plate 2 has the automatic closing function. The fire damper controlled by the analog signal can have both the existing fire damper function and the air volume adjustment function. During the ventilation process, the flow in the pipeline is accurately controlled by the analog signal. In the event of a fire, when the temperature in the pipeline reaches the preset temperature of the valve and closes, the valve can detect the temperature required to be closed through the temperature sensor, and the valve automatically starts the fast closing mode. The closing time is ≤15 S, which plays the role of smoke and fire isolation. The functions of the fire damper and the air volume control valve are integrated into one valve body, which can effectively reduce the cost of manufacturing the valve and effectively reduce the ventilation resistance in the pipeline.

[0028] Specifically, Figure 3 As shown, a cylinder 101 is fixedly connected to the inner wall of the upper side of the valve body shell 1, an opening and closing rack 102 is fixedly connected to the output end of the cylinder 101, and a plurality of T-shaped mounting holes 103 are opened on one side of the valve body shell 1.

[0029] Specifically, Figure 4 As shown, a rotating shaft 201 is fixedly connected to the top of the valve plate 2, and the rotating shaft 201 is rotatably connected to the upper inner wall of the valve body shell 1. An opening and closing wheel 202 is fixedly connected to the rotating shaft 201, and the opening and closing wheel 202 is meshed with the opening and closing rack 102 for transmission.

[0030] Specifically, Figure 4As shown, the transmission mechanism 3 includes a worm 301, which is rotatably connected to the inner wall of the valve plate 2, one end of the worm 301 extends through the inner wall of the rotating shaft 201 to the outside and is fixedly connected to a universal joint 302, the other end of the universal joint 302 is rotatably connected to the rotating shaft 201, one end of the universal joint 302 is fixedly connected to a transmission wheel 303, one side of the transmission wheel 303 is meshingly transmitted with an arc-shaped rack 304, and the arc-shaped rack 304 is fixedly connected to the inner wall of the valve body shell 1.

[0031] A worm wheel 305 is meshingly provided on one side of the worm 301 . The worm wheel 305 is rotatably connected to the inner wall of the valve plate 2 . A ball head rod 306 is fixedly connected to one end of the worm wheel 305 .

[0032] Specifically, Figure 5 As shown, a U-shaped rod 401 is connected and fixedly arranged at one end of the auxiliary sealing plate 4, a sliding frame 402 is slidably arranged on the U-shaped rod 401, a plurality of tension springs A403 are connected and fixedly arranged on the U-shaped rod 401, the other end of the tension spring A403 is connected and fixedly arranged with the inner wall of the sliding frame 402, the sliding frame 402 is slidably arranged with the inner wall of the valve plate 2, a sliding groove rod 404 is connected and fixedly arranged at one end of the sliding frame 402, and the inner wall of the sliding groove rod 404 is slidably arranged with the outer wall of the ball head rod 306. An inclined surface is provided at one end of the auxiliary sealing plate 4 and the valve plate 2.

[0033] Specifically, Figure 6 As shown, the valve plate cleaning rack 5 is arranged in sliding contact with the outer wall of one end of the valve plate 2, and a guide head rack 501 is fixedly connected to one end of the valve plate cleaning rack 5. The guide head rack 501 is slidingly matched with the outer wall of the transmission rod 6. A connecting rod group 502 is rotatably connected to the valve plate cleaning rack 5, and a motor 503 is fixedly connected to the other end of the connecting rod group 502. The motor 503 is fixedly connected to the inner wall of the valve body shell 1.

[0034] Specifically, Figure 6 As shown, a guide groove 601 is provided on the transmission rod 6, and the inner wall of the guide groove 601 is slidably matched with the guide head frame 501. A push rod 602 is fixedly connected to the bottom end of the transmission rod 6. One end of the guide groove 601 is arranged in a straight line structure and the other end is arranged in a spiral structure.

[0035] Specifically, Figure 7As shown, the secondary cleaning mechanism 7 includes a sliding frame 701, which is slidably matched with the inner wall of the bottom end of the valve body shell 1, and a plurality of springs A702 are connected and fixedly arranged on one side of the sliding frame 701, and the other end of the spring A702 is connected and fixedly arranged on the inner wall of the bottom end of the valve body shell 1. The outer wall of one side of the sliding frame 701 is slidably contacted with the outer wall of the push rod 602, and a scraper plate 703 is slidably matched inside the sliding frame 701, and the scraper plate 703 is slidably contacted with the bottom end of the valve plate cleaning frame 5, and a plurality of springs B704 are connected and fixedly arranged on the bottom end of the scraper plate 703, and the other end of the spring B704 is connected and fixedly arranged on the inner wall of the sliding frame 701.

[0036] Specifically, Figure 8 As shown, one end of the pipe connection end 8 is fixedly connected with a plurality of plug-in rods 801, the inner wall of the plug-in rod 801 is penetrated with a mounting block 802 for sliding cooperation, the mounting block 802 and the plug-in rod 801 are movably connected with the T-shaped mounting hole 103, a tension spring B803 is fixedly connected between the mounting block 802 and the inner wall of the plug-in rod 801, one end of the mounting block 802 is fixedly connected with a contact rod 804, a raised ring 805 is rotatably connected inside the pipe connection end 8, the inner protrusion of the raised ring 805 is in sliding contact with the outer wall of the contact rod 804, and a rubber pad is fixedly connected with one side of the pipe connection end 8.

[0037] Working principle, when in use: when it is necessary to install a fire damper on the oil fume duct, first select a suitable pipe connection end 8 according to the size of the oil fume duct and install it on the valve body shell 1, and insert the plug rod 801 on the pipe connection end 8 into the T-shaped mounting hole 103 on the valve body shell 1. At this time, under the action of the tension spring B803, the mounting block 802 will be stuck in the T-shaped mounting hole 103 for fixation. When it is necessary to remove the pipe connection end 8, the raised ring 805 is moved so that the raised position of the raised ring 805 contacts and squeezes the contact rod 804, so that the mounting block 802 connected to the contact rod 804 is retracted into the plug rod 801, so that the plug rod 801 can be taken out from the T-shaped mounting hole 103; During the use of the fire damper, when the gas containing oil smoke in the oil smoke pipe is discharged, the oil smoke and other dirt will adhere to the valve plate 2. At this time, the oil stains on the valve plate 2 need to be cleaned to ensure the sealing between the valve plate 2 when it is closed. The motor 503 drives the connecting rod group 502 to rotate, so that the connecting rod group 502 drives the valve plate cleaning frame 5 to move downward, so that the valve plate cleaning frame 5 scrapes the oil stains on the valve plate 2; When the valve plate cleaning frame 5 moves to the lower side and contacts the scraper plate 703, the guide frame 501 connected to the valve plate cleaning frame 5 drives the transmission rod 6 with the guide groove 601 to rotate, so that the transmission rod 6 drives the push rod 602 to rotate, thereby contacting and pushing the sliding frame 701 to move, so that the sliding frame 701 drives the scraper plate 703 to move, thereby cleaning the oil stains at the bottom of the valve plate cleaning frame 5 to ensure its cleaning effect; When the valve plate 2 needs to be closed, the cylinder 101 is used to drive the opening and closing rack 102 to move, so that the opening and closing rack 102 drives the rotating shaft 201 connected to the opening and closing wheel 202 to rotate, thereby driving the valve plate 2 to close; When the valve plate 2 is closed, the driving wheel 303 will be driven to rotate under the action of the arc-shaped rack 304, so that the driving wheel 303 drives the connected universal joint 302 to rotate, and the universal joint 302 drives the connected worm 301 to rotate. At this time, the worm 301 will drive the ball head rod 306 connected to the worm wheel 305 to swing, so that the other end of the ball head rod 306 slides in the slide groove rod 404, thereby pushing the slide frame 402 connected to the slide groove rod 404 to move. At this time, since the auxiliary sealing plate 4 and one end of the valve plate 2 are provided with inclined surfaces, the auxiliary sealing plate 4 will be driven to move when the slide frame 402 moves. At this time, the auxiliary sealing plate 4 will move to the outside of the valve plate 2, and then under the action of the tension spring A403, the auxiliary sealing plate 4 will be close to the outside of the valve plate 2 and move to contact the outside of the other valve plate 2, so as to achieve secondary sealing between the two valve plates 2 and improve the sealing effect.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fire damper with analog signal control, comprising a valve body housing (1), characterized in that: A plurality of valve plates (2) are rotatably connected to the valve body shell (1), a transmission mechanism (3) is rotatably connected to the valve plate (2), an auxiliary sealing plate (4) is slidably provided in the valve plate (2), a valve plate cleaning frame (5) is slidably provided on the upper inner wall of the valve body shell (1), a transmission rod (6) is rotatably connected to the inner wall of one side of the valve body shell (1), a secondary cleaning mechanism (7) is slidably provided on the lower inner wall of the valve body shell (1), and a pipeline connection end (8) is fixedly mounted on one end of the valve body shell (1).

2. A fire damper with analog signal control according to claim 1, characterized in that: A cylinder (101) is fixedly connected to the inner wall of the upper side of the valve body shell (1), an opening and closing rack (102) is fixedly connected to the output end of the cylinder (101), and a plurality of T-shaped mounting holes (103) are provided on one side of the valve body shell (1).

3. A fire damper with analog signal control according to claim 1, characterized in that: A rotating shaft (201) is fixedly connected to the top of the valve plate (2), the rotating shaft (201) is rotatably connected to the inner wall of the upper side of the valve body shell (1), an opening and closing wheel (202) is fixedly connected to the rotating shaft (201), and the opening and closing wheel (202) is meshed with the opening and closing rack (102) for transmission.

4. A fire damper with analog signal control according to claim 1, characterized in that: The transmission mechanism (3) comprises a worm (301), the worm (301) being rotatably connected to the inner wall of the valve plate (2), one end of the worm (301) passing through the inner wall of the rotating shaft (201) extending to the outside and being connected and fixedly provided with a universal joint (302), the other end of the universal joint (302) being rotatably connected to the rotating shaft (201), one end of the universal joint (302) being connected and fixedly provided with a transmission wheel (303), one side of the transmission wheel (303) being meshingly provided with an arc-shaped rack (304), and the arc-shaped rack (304) being connected and fixedly provided with the inner wall of the valve body shell (1).

5. A fire damper with analog signal control according to claim 4, characterized in that: A worm wheel (305) is provided on one side of the worm (301) for meshing transmission. The worm wheel (305) is rotatably connected to the inner wall of the valve plate (2). A ball head rod (306) is fixedly connected to one end of the worm wheel (305).

6. The fire damper with analog signal control according to claim 1, characterized in that: A U-shaped rod (401) is fixedly connected to one end of the auxiliary sealing plate (4), a sliding frame (402) is slidably arranged on the U-shaped rod (401), a plurality of tension springs A (403) are fixedly connected to the U-shaped rod (401), the other end of the tension spring A (403) is fixedly connected to the inner wall of the sliding frame (402), the sliding frame (402) is slidably arranged on the inner wall of the valve plate (2), a sliding groove rod (404) is fixedly connected to one end of the sliding frame (402), and the inner wall of the sliding groove rod (404) is slidably arranged on the outer wall of the ball head rod (306).

7. The fire damper with analog signal control according to claim 1, characterized in that: The valve plate cleaning frame (5) is arranged in sliding contact with the outer wall of one end of the valve plate (2); a guide head frame (501) is fixedly connected to one end of the valve plate cleaning frame (5); the guide head frame (501) is slidably matched with the outer wall of the transmission rod (6); a connecting rod group (502) is rotatably connected to the valve plate cleaning frame (5); a motor (503) is fixedly connected to the other end of the connecting rod group (502); and the motor (503) is fixedly connected to the inner wall of the valve body shell (1).

8. The fire damper with analog signal control according to claim 1, characterized in that: The transmission rod (6) is provided with a guide groove (601), the inner wall of the guide groove (601) is slidably matched with the guide head frame (501), and a push rod (602) is fixedly connected to the bottom end of the transmission rod (6).

9. The fire damper with analog signal control according to claim 1, characterized in that: The secondary cleaning mechanism (7) comprises a sliding frame (701), the sliding frame (701) is slidably arranged with the inner wall of the bottom end of the valve body shell (1), a plurality of springs A (702) are connected and fixedly arranged on one side of the sliding frame (701), the other end of the spring A (702) is connected and fixedly arranged on the inner wall of the bottom end of the valve body shell (1), the outer wall of one side of the sliding frame (701) is slidably contacted with the outer wall of the push rod (602), a scraper plate (703) is slidably arranged inside the sliding frame (701), the scraper plate (703) is slidably contacted with the bottom end of the valve plate cleaning frame (5), a plurality of springs B (704) are connected and fixedly arranged on the bottom end of the scraper plate (703), the other end of the spring B (704) is connected and fixedly arranged on the inner wall of the sliding frame (701).

10. The fire damper with analog signal control according to claim 1, characterized in that: A plurality of plug-in rods (801) are fixedly connected to one end of the pipe connection end (8), a mounting block (802) is slidably provided through the inner wall of the plug-in rod (801), the mounting block (802) and the plug-in rod (801) are movably engaged with the T-shaped mounting hole (103), a tension spring B (803) is fixedly connected between the mounting block (802) and the inner wall of the plug-in rod (801), a contact rod (804) is fixedly connected to one end of the mounting block (802), a raised ring (805) is rotatably connected to the inside of the pipe connection end (8), a raised portion on the inner side of the raised ring (805) is slidably contacted with the outer wall of the contact rod (804), and a rubber pad is fixedly connected to one side of the pipe connection end (8).

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