On-line monitoring device for opening and closing state of air door baffle

Abstract

The invention relates to the technical field of boiler air door baffles, in particular to an air door baffle opening and closing state online monitoring device which comprises a baffle assembly which comprises a frame, two air door baffle bodies rotationally arranged on the frame and used for controlling the air volume, and a driving mechanism arranged on the frame and used for controlling the air door baffle bodies to rotate to a preset angle. The detection assembly comprises two detection probe rod mechanisms arranged on the frame and used for detecting the opening degree of the air door baffle body, and a gas compression mechanism arranged on the outer side of the frame. The device has the advantages that the direct interaction between the detection ball and the air door baffle body can be detected, the air door state can be monitored in real time, abnormity is immediately fed back to a control system through an electric signal once found, faults can be removed in time, and stable operation of a ventilation system is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of boiler air door dampers, in particular to an online monitoring device for the switch state of an air door damper. Background Art

[0002] Combined damper door is the most common type in boiler flue. This damper door is generally composed of two sets of identical multi-axis dampers, which are achieved by the simultaneous rotation of the damper blades in the rotating device. During the rotation process, the different opening degrees of the dampers of the damper will also cause errors in operation. This phenomenon usually occurs in multi-axis dampers. If the opening and closing degrees of the dampers of the damper are different, for example, some are restricted by the position and some are not open, if the damper opening and closing degree is judged based on the blocked damper at that time, it will appear that the damper has been fully opened, but the wind force at this time is actually not fully open, which will not meet the operation requirements and may cause excessive use of fuel.

[0003] Before leaving the factory, the damper will be coated with anti-rust lubricant on the door shaft. After long-term use, the grease will dry and deteriorate, and eventually cause the door shaft to rust and corrode and become unable to rotate. At this time, you only need to disassemble the damper and re-add lubricating oil.

[0004] As the number of hours the unit is running increases, the dampers related to the air and smoke ducts often have a situation where the external mechanical structure (electric actuator, etc.) does not match the actual opening of the internal damper. The cause of this problem is often the rust of the damper, the breakage of the mechanical structure, etc. After the unit is shut down, in order to prevent such a situation from happening, the general method is to open the hand hole for inspection and perform regular maintenance and debugging. However, damper damper failures often occur during the operation of the unit, and there is a lack of effective means to make a judgment at this time. Summary of the invention

[0005] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The object of the present invention is to provide an on-line monitoring device for the switch status of a damper baffle.

[0007] Therefore, its purpose is to solve the problem that the failure of the air door damper often occurs during the operation of the unit, and there is a lack of effective means to make a judgment at this time.

[0008] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: an online monitoring device for the switch status of a damper baffle, comprising a baffle assembly, which comprises a frame, two damper baffle bodies rotatably arranged on the frame for controlling the air volume, and a driving mechanism arranged on the frame for controlling the damper baffle bodies to rotate to a preset angle; a detection assembly, which comprises two detection probe rod mechanisms arranged on the frame for detecting the opening and closing degree of the damper baffle bodies, and a gas compression mechanism arranged on the outside of the frame, and the gas compression mechanism is driven by the damper baffle body to control the detection probe rod mechanism to rotate to a preset angle.

[0009] As a preferred solution of the online monitoring device for the switch status of the damper baffle of the present invention, wherein: the outer side of the damper baffle body is connected to the frame by a rotating shaft, one end of the rotating shaft passes through the frame and the passing part is connected to a transmission belt, the driving mechanism includes a coupling fixedly connected to the rotating shaft, and one end of the coupling is transmission-connected to a motor.

[0010] As a preferred solution of the online monitoring device for the switch status of the damper baffle of the present invention, wherein: the detection probe rod mechanism includes a detection shell fixed on the frame, the detection shell is provided with a detection port on the side facing the damper baffle body, a detection ball is rotatably connected inside the detection port, a rotating rod is rotatably connected inside the detection ball, the rotating rod extends from the inside of the detection ball and is fixedly connected to the detection shell.

[0011] As a preferred solution of the on-line monitoring device for the switch status of the damper baffle of the present invention, a driving groove is provided in the part of the detection ball located in the detection shell, a sealing block is provided in the middle of the driving groove, and a reset spring is abutted against the lower half of the sealing block.

[0012] As a preferred solution of the online monitoring device for the switch status of the damper baffle of the present invention, wherein: the gas compression mechanism includes a compression shell fixed on the outside of the frame, two symmetrically distributed compression chambers are opened inside the compression shell, a compression plate is rotatably connected to the middle of the compression chamber, and a gas circulation mechanism is symmetrically distributed inside the compression chamber. The gas circulation mechanism is used to transport compressed gas to the detection probe rod mechanism to push the detection ball to rotate to a preset angle, and the compression plate is fixedly connected to the rotating shaft.

[0013] As a preferred solution of the online monitoring device for the switch status of the damper baffle of the present invention, the gas circulation mechanism includes a compression cylinder and a compression rod, one end of the compression rod is slidably arranged with the compression cylinder, and when the compression plate is rotated to a preset angle, it will squeeze the preset compression rod, so that the air holes on the compression rod are connected with the air holes on the compression cylinder to discharge the gas, and a delay friction pad is provided between the compression cylinder and the compression rod.

[0014] As a preferred solution of the on-line monitoring device for the damper baffle switch status of the present invention, wherein: a probe rod body is slidably connected to the detection sphere, a probe is provided on the side of the probe rod body facing the damper baffle body, and the probe is communicatively connected to the alarm device.

[0015] As a preferred solution of the on-line monitoring device for the switch status of the damper baffle of the present invention, the probe rod body and the detection ball are fixedly connected with a tension spring, and an arc-shaped push plate for pushing the probe rod body is fixed on the rotating rod.

[0016] As a preferred solution of the online monitoring device for the switch status of the damper baffle of the present invention, a scraper movably connected to the detection ball is provided under the probe rod body, a tension spring is fixed between the scraper and the detection ball, and a magnetic push plate that drives the scraper to move is fixed on the rotating rod.

[0017] As a preferred solution of the on-line monitoring device for the switch status of the damper baffle of the present invention, the scraper is made of elastic material, and an anti-stick coating is sprayed on the surface of the scraper.

[0018] The beneficial effects of the damper baffle switch status online monitoring device of the present invention are: the direct interaction between the detection ball and the damper baffle body can monitor the damper status in real time. Once an abnormality is found, it is immediately fed back to the control system via an electrical signal, which helps to eliminate faults in time and ensure the stable operation of the ventilation system.

[0019] The magnetic push plate and tension spring are used to automatically clean the contact area between the detection probe and the damper plate, which reduces maintenance requirements, extends the service life of the equipment, and ensures the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the on-line monitoring device for the switch status of the air door damper in the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the gas compression mechanism of the on-line monitoring device for the switch status of the air door damper in the present invention.

[0023] Figure 3 It is a schematic diagram of the side cross-sectional structure of the damper damper body of the damper damper switch status online monitoring device in the present invention.

[0024] Figure 4 It is a schematic diagram of the exploded structure of the detection probe mechanism of the air door damper switch status online monitoring device in the present invention.

[0025] Figure 5 It is a schematic diagram showing the structure of the detection ball of the on-line monitoring device for the switch status of the air door baffle in the present invention.

[0026] Figure 6 It is a schematic diagram of the explosion structure of the detection ball of the on-line monitoring device for the switch status of the air door damper in the present invention.

[0027] In the figure:

[0028] 100, baffle assembly; 101, frame; 102, damper baffle body; 103, driving mechanism;

[0029] 200, detection assembly; 201, detection probe mechanism; 202, gas compression mechanism;

[0030] 201a, detection housing; 201b, detection sphere; 201c, rotating rod; 201d, driving slot; 201e, probe body; 201f, tension spring; 201g, arc push plate; 201h, magnetic push plate;

[0031] 201b-1, scraper;

[0032] 202a, compression shell; 202b, compression chamber; 202c, compression plate; 202d, gas circulation mechanism. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1

[0037] Reference Figure 1-3, which is the first embodiment of the present invention, and this embodiment provides an online monitoring device for the switch status of a damper baffle, including a baffle assembly 100, which includes a frame 101, two damper baffle bodies 102 rotatably arranged on the frame 101 for controlling the air volume, and a driving mechanism 103 arranged on the frame 101 for controlling the damper baffle bodies 102 to rotate to a preset angle; a detection assembly 200, which includes two detection probe rod mechanisms 201 arranged on the frame 101 for detecting the opening and closing degree of the damper baffle bodies 102, and a gas compression mechanism 202 arranged on the outside of the frame 101, and the gas compression mechanism 202 is driven by the damper baffle bodies 102 to control the detection probe rod mechanism 201 to rotate to a preset angle.

[0038] The damper baffle body 102 is a rotating component that directly controls the air volume in the air duct and is installed on the frame 101. It can be adjusted to different angles as needed to adjust the air volume; the driving mechanism 103 is located on the frame 101 and is responsible for driving the damper baffle body 102 to rotate to a predetermined angle according to an external control signal or a set program to achieve precise control of the air volume; the two detection elements of the detection probe mechanism 201 installed on the frame 101 are designed to sense whether the damper baffle body 102 is opened and closed in place; the gas compression mechanism 202 is located on the outside of the frame 101, and its function is to receive the driving force from the movement of the damper baffle body 102 and convert this driving force so that the detection probe mechanism 201 can rotate to the corresponding preset angle following the opening and closing action of the damper baffle body 102; the advantage of the device is that it can monitor the state of the damper baffle in real time, improve the automation level and reliability of the ventilation control system, and convert mechanical movement into electrical signals or other readable signals, so that the control system can perform feedback adjustment and timely detect and handle damper faults.

[0039] Example 2

[0040] Reference Figure 2-5 , which is the second embodiment of the present invention, and is different from the previous embodiment in that it also includes a damper baffle body 102, the outer side of the damper baffle body 102 is connected to the frame 101 through a rotating shaft, one end of the rotating shaft passes through the frame 101 and the part passing through is connected to a transmission belt, and the driving mechanism 103 includes a coupling fixedly connected to the rotating shaft, and one end of the coupling is connected to a motor in a transmission manner. The detection probe mechanism 201 includes a detection housing 201a fixed to the frame 101, and the detection housing 201a is provided with a detection port on the side facing the damper baffle body 102, and a detection ball 201b is rotatably connected inside the detection port, and a rotating rod 201c is rotatably connected inside the detection ball 201b, and the rotating rod 201c extends from the inside of the detection ball 201b and is fixedly connected to the detection housing 201a. The detection ball 201b is provided with a driving groove 201d in the part of the detection housing 201a, and a sealing block is provided in the middle of the driving groove 201d, and a reset spring is abutted against the lower half of the sealing block.

[0041] The driving mechanism 103 includes a motor and a coupling fixedly connected to the shaft, which is used to drive the rotation of the damper baffle body 102. The motor provides power and transmits the rotational motion to the shaft through the coupling, thereby controlling the opening and closing of the damper baffle body 102. The detection probe mechanism 201 is a device for monitoring the position or state of the damper to ensure the safe and efficient operation of the system. The detection housing 201a is fixed on the frame 101, providing an installation space for the detection ball 201b, and a detection port is set to facilitate the mutual detection of the detection ball 201b and the damper baffle body 102. movement; the detection ball 201b is located in the detection port and can rotate freely, directly contacting the damper baffle body 102, and reflecting the opening and closing state of the damper baffle body 102 through its position change; the driving groove 201d and the sealing block and the reset spring, this design ensures the stability and reliability of the detection ball 201b during the detection process, the driving groove is used to guide and limit the movement direction of the detection ball 201b, and the sealing block and the reset spring work together to keep the position of the detection ball 201b accurate and have self-resetting ability, and can return to the initial position even without external force.

[0042] The gas compression mechanism 202 includes a compression shell 202a fixed on the outside of the frame 101, and two symmetrically distributed compression chambers 202b are provided inside the compression shell 202a. A compression plate 202c is rotatably connected to the middle of the compression chamber 202b, and a gas circulation mechanism 202d is symmetrically distributed inside the compression chamber 202b. The gas circulation mechanism 202d is used to transport compressed gas to the detection probe mechanism 201 to push the detection sphere 201b to rotate to a preset angle, and the compression plate 202c is fixedly connected to the rotating shaft. The gas circulation mechanism 202d includes a compression cylinder and a compression rod, and one end of the compression rod is slidably arranged with the compression cylinder. When the compression plate 202c rotates to a preset angle, it squeezes the preset compression rod, so that the air holes on the compression rod are connected with the air holes on the compression cylinder to discharge the gas, and a delay friction pad is provided between the compression cylinder and the compression rod.

[0043] In this embodiment, when in use, the motor drives the shaft to rotate through the coupling, and the shaft drives the fixed damper baffle body 102 to rotate to a preset angle to open the damper baffle body 102. The transmission belt can be used to open and close multiple damper baffle bodies 102 at the same time, which is easy to use.

[0044] At the same time, the rotating shaft drives the fixedly connected compression plate 202c to rotate to a preset angle. For example, when the damper baffle body 102 is in an open state, the compression plate 202c will not only compress part of the gas in the compression chamber 202b during the rotation process, but also open the gas circulation mechanism 202d. In other words, the compression plate 202c will push the compression rod so that the air hole on the compression rod corresponds to the air hole on the compression cylinder. Therefore, the compressed gas in the compression chamber 202b will be discharged from the air hole, and the discharged compressed gas will enter the driving groove 202d. 01d, the sealing block in the driving groove 201d will block the flow of compressed gas, so it generates thrust on the detection ball 201b, so that the detection ball 201b rotates to a preset angle to open the probe rod body 201e, and realizes the contact between the probe rod body 201e and the damper baffle body 102. After the probe rod body 201e contacts the damper baffle body 102, a current loop is formed, and the power is cut off after a pulse signal is sent (it is easy to cause electrical failure if it is often energized), so that the actual situation of the opening and closing state of the internal damper baffle body 102 can be clearly judged; refer to Figure 5 That is to say, the probe rod body 201e is located inside the detection housing 201a when not in use, thereby preventing dirt from adhering to the probe rod body 201e and affecting the detection accuracy. When the damper baffle body 102 rotates to a preset position, the probe rod body 201e can be automatically opened by the drive of the mechanical structure, thereby realizing automatic detection of the opening and closing degree of the damper baffle body 102, which is easy to use.

[0045] In addition, when the damper baffle body 102 is in a closed state, the compression plate 202c will be separated from the compression rod, and a delay friction pad is provided between the compression rod and the compression cylinder. When the push spring in the compression cylinder pushes the compression rod to reset, the friction force generated by the delay friction pad will slow down the movement speed of the compression rod, thereby achieving a delayed reset effect, so that the reset spring can quickly push the detection ball 201b to reset. When resetting, the detection ball 201b can re-deliver the gas to the compression chamber 202b to achieve repeated operation detection.

[0046] In addition, two detection probe rod mechanisms 201 are provided, which are respectively designed to be in the fully opened position and the closed position, so as to clearly detect the actual opening and closing state of the internal air door baffle body 102.

[0047] Example 3

[0048] Reference Figure 5-6, which is the third embodiment of the present invention, and this embodiment further provides an online monitoring device for the switch state of a damper damper. It includes a detection sphere 201b, on which a probe rod body 201e is slidably connected, and a probe is provided on the side of the probe rod body 201e facing the damper damper body 102, and the probe is in communication connection with an alarm device, and the alarm device is preferably an audible and visual alarm. A tension spring 201f is fixedly connected between the probe rod body 201e and the detection sphere 201b, and an arc-shaped push plate 201g that pushes the probe rod body 201e is fixed on the rotating rod 201c. A scraper 201b-1 that is movably connected to the detection sphere 201b is provided below the probe rod body 201e, a tension spring is fixed between the scraper 201b-1 and the detection sphere 201b, and a magnetic push plate 201h that drives the scraper 201b-1 to move is fixed on the rotating rod 201c. The scraper 201b-1 is made of elastic material, and the surface of the scraper 201b-1 is sprayed with an anti-stick coating, which can reduce the adhesion of dirt and dust on the scraper surface, so that the scraper can more easily return to a clean state after each action.

[0049] It can be seen from Example 2 that the detection sphere 201b rotates around the rotating rod 201c, so when the detection sphere 201b is at the open use angle, the probe rod body 201e will be squeezed by the arc-shaped push plate 201g during the rotation process, so the probe rod body 201e will extend outward from the detection sphere 201b, thereby improving the contact tightness with the damper baffle body 102, and the arc-shaped push plate 201g can be made of elastic material, so it will not cause squeezing damage to the probe rod body 201e, and when the probe rod body 201e is in a closed state, the probe rod body 201e is no longer squeezed by the arc-shaped push plate 201g, and the probe rod body 201e will be reset under the pulling of the tension spring 201f, so it will not interfere with the rotation of the detection sphere 201b.

[0050] And when the detection sphere 201b is opened, the scraper 201b-1 will contact the surface of the damper baffle body 102 through the scraper 201b-1, and automatically clean the position where the probe rod body 201e contacts, thereby avoiding the accumulation of dust or dirt; when the scraper 201b-1 is rotated to the position corresponding to the magnetic push plate 201h through the magnetic push plate 201h, the magnetic force generated by the magnetic push plate 201h attracts the scraper 201b-1 to move, so that it slides into the detection sphere 201b, thereby cleaning the dirt accumulated on its surface, avoiding secondary pollution caused by residual dirt, and the scraper 201b-1 is supported by a tension spring, so the scraper 201b-1 can automatically extend for cleaning when it is not attracted by the magnetic force of the magnetic push plate 201h.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0052] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0053] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An online monitoring device for the switch status of a damper, characterized in that: include, A baffle assembly (100) comprising a frame (101), two damper baffle bodies (102) rotatably arranged on the frame (101) for controlling air volume, and a driving mechanism (103) arranged on the frame (101) for controlling the damper baffle bodies (102) to rotate to a preset angle; A detection assembly (200) comprises two detection probe rod mechanisms (201) arranged on the frame (101) for detecting the opening and closing degree of a damper baffle body (102), and a gas compression mechanism (202) arranged outside the frame (101), wherein the gas compression mechanism (202) is driven by the damper baffle body (102) to control the detection probe rod mechanism (201) to rotate to a preset angle.

2. The on-line monitoring device for the switch status of the air damper as claimed in claim 1, characterized in that: The outer side of the damper baffle body (102) is connected to the frame (101) via a rotating shaft, one end of the rotating shaft passes through the frame (101) and the passing portion is connected to a transmission belt, and the driving mechanism (103) comprises a coupling fixedly connected to the rotating shaft, one end of the coupling is drivingly connected to a motor.

3. The on-line monitoring device for the switch status of the damper plate according to claim 2, characterized in that: The detection probe mechanism (201) comprises a detection housing (201a) fixed on the frame (101); a detection port is provided on a side of the detection housing (201a) facing the damper baffle body (102); a detection ball (201b) is rotatably connected inside the detection port; a rotating rod (201c) is rotatably connected inside the detection ball (201b); the rotating rod (201c) extends from the inside of the detection ball (201b) and is fixedly connected to the detection housing (201a).

4. The on-line monitoring device for the switch status of the air damper as claimed in claim 3, characterized in that: The portion of the detection ball (201b) located in the detection housing (201a) is provided with a driving groove (201d), a sealing block is provided in the middle of the driving groove (201d), and a reset spring is abutted against the lower half of the sealing block.

5. The on-line monitoring device for the switch status of the air damper as claimed in claim 4, characterized in that: The gas compression mechanism (202) comprises a compression shell (202a) fixed on the outside of the frame (101); two symmetrically distributed compression chambers (202b) are provided inside the compression shell (202a); a compression plate (202c) is rotatably connected to the middle of the compression chamber (202b); a gas circulation mechanism (202d) is symmetrically distributed inside the compression chamber (202b); the gas circulation mechanism (202d) is used to transport compressed gas to the detection probe mechanism (201) to push the detection sphere (201b) to rotate to a preset angle; and the compression plate (202c) is fixedly connected to the rotating shaft.

6. The on-line monitoring device for the switch status of the air damper as claimed in claim 5, characterized in that: The gas circulation mechanism (202d) comprises a compression cylinder and a compression rod, one end of the compression rod is slidably arranged with the compression cylinder, and when the compression plate (202c) rotates to a preset angle, it squeezes the preset compression rod, so that the air holes on the compression rod are connected with the air holes on the compression cylinder to discharge the gas, and a delay friction pad is provided between the compression cylinder and the compression rod.

7. The on-line monitoring device for the switch status of the air damper as claimed in claim 5, characterized in that: The detection sphere (201b) is slidably connected to a probe rod body (201e), and a probe is provided on a side of the probe rod body (201e) facing the damper baffle body (102), and the probe is communicatively connected to the alarm device.

8. The on-line monitoring device for the switch status of the air damper as claimed in claim 7, characterized in that: The probe rod body (201e) and the detection sphere (201b) are fixedly connected with a tension spring (201f), and an arc-shaped push plate (201g) for pushing the probe rod body (201e) is fixed on the rotating rod (201c).

9. The on-line monitoring device for the switch status of the air damper as claimed in claim 8, characterized in that: A scraper (201b-1) movably connected to the detection sphere (201b) is provided below the probe rod body (201e), a tension spring is fixed between the scraper (201b-1) and the detection sphere (201b), and a magnetic push plate (201h) for driving the scraper (201b-1) to move is fixed on the rotating rod (201c).

10. The on-line monitoring device for the switch status of the air door damper according to claim 9, characterized in that: The scraper (201b-1) is made of elastic material, and an anti-stick coating is sprayed on the surface of the scraper (201b-1).

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