Air door anti-blocking device for automatically controlling air volume of combustor

Abstract

The invention provides an air door anti-blocking device for automatically controlling the air volume of a combustor. The air door anti-blocking device comprises a main body, a barrel-shaped air door, an anti-blocking unit and a driving mechanism, a plurality of air inlets are formed in the main body at intervals in the circumferential direction; the barrel-shaped air door is movably arranged on the outer side of the air inlet of the main body in a sleeving manner; the anti-clamping unit comprises an anti-clamping guide rail, a fixing lug, a guide rail wheel, a dust cleaning brush and an air door push-pull rod; the anti-clamping guide rail is arranged on the main body; the fixing lugs are arranged on the outer side of the barrel-shaped air door; a fixing groove is formed below the fixing lug, the guide rail wheel is installed in the fixing groove, and the guide rail wheel is in sliding contact with the anti-clamping guide rail; the ash removal brush is arranged in the fixing groove, and the bottom of the ash removal brush is tightly attached to the anti-clamping guide rail; one end of the air door push-pull rod is connected with the fixing lug; and the other end of the air door push-pull rod is connected with the driving mechanism. The barrel-shaped air door has the technical effects that the design is reasonable, and movement and jamming of the barrel-shaped air door are effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of burner air volume control, and in particular relates to an air door anti-stuck device for automatic control of burner air volume. Background Art

[0002] As the cornerstone of the energy system, coal-fired power plants face the dual pressures of achieving ultra-low emissions and "dual carbon" goals. They face the challenge of balancing low nitrogen emissions with improved energy efficiency. The dynamic balance between nitrogen oxide (NOx) production and boiler thermal efficiency during combustion has become a core technical bottleneck restricting clean and efficient power generation. Traditional combustion control systems, limited by manual adjustments, suffer from response lags and insufficient precision, making it difficult to achieve the optimal spatial and temporal matching of air and coal.

[0003] In this context, an artificial intelligence-based combustion optimization control system came into being. Its core lies in building a multi-dimensional air volume distribution model through precise regulation of the damper mechanism to achieve real-time closed-loop control under dynamic working conditions.

[0004] However, the damper anti-sticking device, a key actuator in this system, addresses the problem of traditional mechanical structures being susceptible to sticking and failure due to ash deposits. Therefore, a damper anti-sticking device that automatically controls burner air volume is urgently needed to significantly improve equipment reliability and provide key technical support for the "low-carbon, high-efficiency" transformation of thermal power units. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art and provide a new technical solution for an air damper anti-stuck device for automatic control of burner air volume.

[0006] According to a first aspect of the present invention, there is provided a damper anti-stuck device for automatic control of burner air volume, comprising:

[0007] A main body and a barrel-shaped damper, wherein the main body is provided with a plurality of air inlets spaced apart along the circumference; the barrel-shaped damper is movably sleeved on the outer side of the air inlet of the main body;

[0008] An anti-stuck unit, comprising an anti-stuck guide rail, a fixing ear, a guide wheel, a dust cleaning brush and an air door push-pull rod; the anti-stuck guide rail is provided on the main body, and the anti-stuck guide rail is distributed along the axial direction of the main body; the outer side of the barrel-shaped air door is provided with the fixing ear; a fixing groove is provided below the fixing ear, the guide wheel is installed in the fixing groove, and the guide wheel is in sliding contact with the anti-stuck guide rail; the dust cleaning brush is provided in the fixing groove, and the two dust cleaning brushes are respectively located on the front and rear sides of the guide wheel, and the bottom of the dust cleaning brush is in close contact with the anti-stuck guide rail; one end of the air door push-pull rod is connected to the fixing ear;

[0009] a driving mechanism, the other end of the damper push-pull rod being connected to the driving mechanism;

[0010] The damper push-pull rod moves along the axial direction of the main body under the action of the driving mechanism, and drives the barrel-shaped damper to move through the anti-stuck unit to adjust the opening length of the air inlet; wherein, when the anti-stuck unit moves, the dust cleaning brush contacts the guide wheel and the anti-stuck guide rail in front of the movement to remove dust accumulated on the anti-stuck guide rail.

[0011] Optionally, the two fixing ears are respectively located on opposite sides of the barrel-shaped damper;

[0012] Two fixing grooves are provided below each of the fixing ears, and a guide wheel and two cleaning brushes located at the front and rear sides of the guide wheel are provided in each of the fixing grooves.

[0013] Optionally, it also includes a closing limit and an opening limit;

[0014] The closing limit and the opening limit are both provided on the main body and are respectively located on opposite sides of the air inlet;

[0015] When the barrel-shaped damper moves to completely close the air inlet, the barrel-shaped damper contacts the closing limit;

[0016] When the barrel-shaped damper moves to fully open the air inlet, the barrel-shaped damper contacts the opening limit.

[0017] Optionally, it further includes a tube wall and a push-pull sleeve; the tube wall and the push-pull sleeve are provided on the main body, the tube wall is located on the side of the open limit away from the close limit, and the push-pull sleeve is located on the side of the tube wall away from the barrel-shaped damper;

[0018] The damper push-pull rod passes through the tube wall and the push-pull sleeve in sequence and is connected to the driving mechanism located on the other side of the push-pull sleeve, and the damper push-pull rod is sealed and connected to the push-pull sleeve.

[0019] Optionally, the push-pull sleeve includes a body, a purge pipe, a sealing ring, an annular air chamber, a spiral nozzle and a spiral spoiler flap component;

[0020] The annular air chamber is provided at one end of the body close to the driving mechanism, and the sealing ring is provided between the annular air chamber and the damper push-pull rod; the purge pipe is connected to the annular air chamber for blowing compressed air into the annular air chamber;

[0021] The annular air chamber is connected to the spiral nozzle at one end away from the purge pipe, and the main body is provided with the spiral spoiler flap component to enhance the surrounding effect of the spiral purge wind blown out by the spiral nozzle.

[0022] Optionally, the driving mechanism includes an electric piston rod, an electric piston cylinder, a servo motor, a power switching clutch and a hand control panel;

[0023] The electric piston rod is installed on the electric piston cylinder, and the end of the damper push-pull rod away from the barrel-shaped damper is connected to the electric piston rod;

[0024] The servo motor is connected to the electric piston cylinder, and the electric piston cylinder is used to increase the torque of the servo motor;

[0025] The power switching clutch is provided between the electric piston cylinder and the servo motor to cut off the mechanical connection between the servo motor and the electric piston cylinder and mechanically connect the hand control panel to the electric piston cylinder.

[0026] Optionally, the driving mechanism further includes a fixed support frame;

[0027] One end of the fixed support frame is fixed to the pipe wall, and the other end is fixed with the electric piston cylinder and the servo motor;

[0028] An opening scale is provided in the middle of the fixed support frame, and a pointer is provided on the side of the damper push-pull rod facing the opening scale.

[0029] Optionally, the pointer is made of stainless steel.

[0030] Optionally, the driving mechanism includes a connecting nut;

[0031] The damper push-pull rod is connected to the electric piston rod through the connecting nut.

[0032] Optionally, the pointer is close to the connecting nut.

[0033] A technical effect of the present invention is:

[0034] In the embodiment of the present application, a fixing groove is provided below the fixing ear, and the guide wheel is installed in the fixing groove, and the guide wheel is in sliding contact with the anti-stuck guide rail, thereby being able to better reduce the adjustment resistance of the barrel-shaped damper; moreover, when the anti-stuck unit moves, the dust cleaning brush first contacts the guide wheel with the anti-stuck guide rail in front of the movement to remove the accumulated dust on the anti-stuck guide rail, thereby being able to effectively prevent the anti-stuck guide rail from being stuck due to dust accumulation, thereby better solving the problem of traditional mechanical structures being susceptible to jamming and failure caused by dust deposition, and significantly improving equipment reliability, providing key technical guarantees for thermal power units to achieve "low-carbon and high-efficiency" transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a damper anti-stuck device for automatic control of burner air volume according to one embodiment of the present invention;

[0036] Figure 2 A top view of a damper anti-stuck device for automatic burner air volume control according to one embodiment of the present invention;

[0037] Figure 3 A bottom view of a damper anti-stuck device for automatic burner air volume control according to one embodiment of the present invention;

[0038] Figure 4 A side view of an air damper anti-stuck device for automatic burner air volume control according to an embodiment of the present invention;

[0039] Figure 5 A cross-sectional view and a detailed enlarged schematic diagram of a damper anti-stuck device for automatic burner air volume control according to one embodiment of the present invention;

[0040] Figure 6 The present invention is a schematic structural diagram of a push-pull sleeve of an air door anti-stuck device for automatic control of burner air volume according to an embodiment of the present invention.

[0041] In the figure: 1. Main body; 11. Close limit; 12. Air inlet; 13. Open limit; 2. Barrel-shaped damper; 21. Anti-stuck guide rail; 22. Fixing ear; 23. Fixing slot; 24. Guide wheel; 25. Cleaning brush; 26. Damper push-pull rod; 3. Pull rod sleeve; 31. Purge pipe; 32. Sealing ring; 33. Annular air chamber; 34. Spiral nozzle; 35. Spiral spoiler flap; 36. Main body; 4. Driving mechanism; 41. Fixed support frame; 42. Opening scale; 43. Pointer; 44. Connecting nut; 45. Electric piston rod; 46. Electric piston cylinder; 47. Servo motor; 48. Power switching clutch; 49. Hand control panel. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0043] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0047] According to the first aspect of the present invention, see Figures 1 to 6 , provides a damper anti-stuck device for automatic control of burner air volume, comprising:

[0048] A main body 1 and a barrel-shaped damper 2, wherein the main body 1 is provided with a plurality of air inlets 12 spaced apart along the circumference; the barrel-shaped damper 2 is movably sleeved on the outer side of the air inlet 12 of the main body 1;

[0049] The anti-stuck unit comprises an anti-stuck guide rail 21, a fixing lug 22, a guide rail wheel 24, a dust cleaning brush 25 and a damper push-pull rod 26; the anti-stuck guide rail 21 is arranged on the main body 1 and is distributed along the axial direction of the main body 1; the fixing lug 22 is arranged on the outer side of the barrel-shaped damper 2; a fixing groove 23 is arranged below the fixing lug 22, the guide rail wheel 24 is installed in the fixing groove 23, and the guide rail wheel 24 is in sliding contact with the anti-stuck guide rail 21; the dust cleaning brush 25 is arranged in the fixing groove 23, two dust cleaning brushes 25 are respectively located on the front and rear sides of the guide rail wheel 24, and the bottom of the dust cleaning brush 25 is in close contact with the anti-stuck guide rail 21; one end of the damper push-pull rod 26 is connected with the fixing lug 22.

[0050] A driving mechanism 4 is connected with the other end of the damper push-pull rod 26.

[0051] The damper push-pull rod 26 moves along the axial direction of the main body 1 under the action of the driving mechanism 4 and drives the barrel-shaped damper 2 to move through the anti-stuck unit, so as to adjust the opening length of the air inlet 12; when the anti-stuck unit moves, the dust cleaning brush 25 first contacts the anti-stuck guide rail 21 in front of the moving position of the guide rail wheel 24, so as to clean the dust on the anti-stuck guide rail 21.

[0052] In the embodiment, the fixing groove 23 is arranged below the fixing lug 22, the guide rail wheel 24 is installed in the fixing groove 23, and the guide rail wheel 24 is in sliding contact with the anti-stuck guide rail 21, so that the adjustment resistance of the barrel-shaped damper 2 can be reduced; when the anti-stuck unit moves, the dust cleaning brush 25 first contacts the anti-stuck guide rail 21 in front of the moving position of the guide rail wheel 24, so as to clean the dust on the anti-stuck guide rail 21, thereby effectively preventing the anti-stuck guide rail 21 from being stuck due to dust accumulation, avoiding the movement of the barrel-shaped damper 2 from being stuck, and better solving the problem that the traditional mechanical structure is prone to being stuck due to dust accumulation, and significantly improving the reliability of the equipment, thereby providing a key technical support for realizing the “low-carbon and high-efficiency” transformation of the thermal power unit.

[0053] For example, the material of the main body 1 is ZG40Cr30Ni16Si2NRe high-toughness heat-resistant steel, which is arranged between the pipe walls of the secondary air pipe and on the burner body 36, and the air inlet 12 is changed by the barrel-shaped damper 2 to achieve the purpose of air distribution.

[0054] Optionally, the two fixing lugs 22 are respectively located on the opposite sides of the barrel-shaped damper 2.

[0055] Two fixing grooves 23 are arranged below each fixing lug 22, one guide rail wheel 24 and two dust cleaning brushes 25 located on the front and rear sides of the guide rail wheel 24 are arranged in each fixing groove 23.

[0056] In the above embodiment, the fixing ears 22 help to better support the barrel-shaped damper 2 on the anti-stuck guide rail 21, thereby ensuring the stability of the movement of the barrel-shaped damper 2.

[0057] Optionally, it also includes a closing limit 11 and an opening limit 13;

[0058] The closing limit position 11 and the opening limit position 13 are both provided on the main body 1 and are respectively located on opposite sides of the air inlet 12;

[0059] When the barrel-shaped damper 2 moves to completely close the air inlet 12, the barrel-shaped damper 2 contacts the closing limit 11;

[0060] When the barrel-shaped damper 2 moves to fully open the air inlet 12 , the barrel-shaped damper 2 contacts the opening limit 13 .

[0061] In the above embodiment, the damper anti-stuck device for automatic burner air volume control uses a barrel damper 2, which changes the traditional adjustment method. With the support of the drive mechanism 4, the barrel damper 2 is supported and fixed by an anti-stuck guide rail 21 and a guide wheel 24. A dust cleaning brush 25 is used to clean dust accumulated on the anti-stuck guide rail 21 to ensure smooth adjustment of the barrel damper 2. At the same time, the air inlet 12 is accurately controlled to be fully open or fully closed under the action of the closing limit 11 and the opening limit 13. The opening size of the air inlet 12 can be remotely and automatically adjusted through the drive mechanism 4.

[0062] Exemplarily, the closing limit 11 and the main body 1 are designed as one body, and are welded and fixed around the main body 1 (i.e., the burner body) in a ring-shaped edge behind the air inlet 12. The function is to stop the barrel-shaped damper 2 from moving further when it moves to completely cover the air inlet 12, to prevent it from moving too far and failing to completely cover the air inlet 12.

[0063] The opening limit 13 is designed as an integral part of the main body 1 and is located in front of the air inlet 12 and approximately equal to the length of the barrel-shaped damper 2 from the edge of the air inlet 12. It is welded and fixed around the main body 1. Its function is to limit the further movement of the barrel-shaped damper 2 when it is opened to the maximum.

[0064] The air inlet 12 is designed as an integral whole with the main body 1 and is distributed and cut into N equal parts along the 1360-degree circular shape of the main body to form the air inlet 12 .

[0065] Optionally, it further includes a tube wall and a push-pull sleeve; the main body 1 is provided with a tube wall and a push-pull sleeve, the tube wall is located on the side of the open limit 13 away from the close limit 11, and the push-pull sleeve is located on the side of the tube wall away from the barrel-shaped damper 2;

[0066] The damper push-pull rod 26 passes through the tube wall and the push-pull sleeve in sequence and is connected to the driving mechanism 4 located on the other side of the push-pull sleeve, and the damper push-pull rod 26 is sealedly connected to the push-pull sleeve.

[0067] In the above embodiment, the cooperation between the push-pull sleeve and the damper push-pull rod 26 effectively prevents dust from being deposited on the damper push-pull rod 26 , and effectively prevents the damper push-pull rod 26 from getting stuck during the movement.

[0068] Optionally, the push-pull sleeve includes a body 36, a purge pipe 31, a sealing ring 32, an annular air chamber 33, a spiral nozzle 34 and a spiral spoiler flap 35;

[0069] The annular air chamber 33 is provided at one end of the body 36 close to the driving mechanism 4, and the sealing ring 32 is provided between the annular air chamber 33 and the damper push-pull rod 26; the purge pipe 31 is connected to the annular air chamber 33 for blowing compressed air into the annular air chamber 33;

[0070] The annular air chamber 33 is connected to the spiral nozzle 34 at one end away from the purge pipe 31 . The spiral spoiler 35 is provided in the body 36 to enhance the surrounding effect of the spiral purge air blown out by the spiral nozzle 34 .

[0071] In the above embodiment, the pull rod sleeve 3 blows the compressed air into the annular air chamber 33 through the purge pipe 31, and then distributes the compressed air to the spiral nozzle 34 through the annular air chamber 33; since the air outlet of the spiral nozzle 34 in the pull rod sleeve 3 is spirally blown out obliquely, the blown wind is blown into the pipeline in a spiral manner around the damper push-pull rod 26 in the pull rod sleeve 3; and, the spiral spoiler flap 35 provided in the middle part of the pull rod sleeve 3 will once again strengthen the surrounding effect of the spiral purge wind blown out by the spiral nozzle 34 with the gradually weakened surrounding wind to achieve a blowing effect without dead angles.

[0072] Optionally, the driving mechanism 4 includes an electric piston rod 45, an electric piston cylinder 46, a servo motor 47, a power switching clutch 48 and a hand control panel;

[0073] The electric piston rod 45 is installed on the electric piston cylinder 46, and the end of the damper push-pull rod 26 away from the barrel-shaped damper 2 is connected to the electric piston rod 45;

[0074] The servo motor 47 is connected to the electric piston cylinder 46, and the electric piston cylinder 46 is used to increase the torque of the servo motor 47;

[0075] The power switching clutch 48 is provided between the electric piston cylinder 46 and the servo motor 47 to cut off the mechanical connection between the servo motor 47 and the electric piston cylinder 46 and mechanically connect the hand control panel 49 to the electric piston cylinder 46 .

[0076] In the above embodiment, when manual adjustment is required, the power switching clutch 48 can be operated to switch the power mechanical connection of the servo motor 47 to the hand control panel 49. While adjusting the opening using the hand control panel 49, the opening scale 42 and the pointer 43 can be referred to to determine the adjustment status. At the same time, the feedback of the actual opening on site can also be seen remotely. After the on-site adjustment is completed, the power switching clutch 48 can be switched back to the servo motor 47 drive mode. The operation is simple and convenient.

[0077] Optionally, the driving mechanism 4 further includes a fixed support frame 41;

[0078] One end of the fixed support frame 41 is fixed to the pipe wall, and the other end is fixed with the electric piston cylinder 46 and the servo motor 47;

[0079] An opening scale 42 is provided in the middle of the fixed support frame 41 , and a pointer 43 is provided on the side of the damper push-pull rod 26 facing the opening scale 42 .

[0080] In the above embodiment, it helps to ensure the stability of the fixing of the driving mechanism 4 .

[0081] Optionally, the pointer 43 is made of stainless steel, which helps to ensure the reliability of the pointer 43.

[0082] Optionally, the driving mechanism 4 includes a connecting nut 44;

[0083] The damper push-pull rod 26 is connected to the electric piston rod 45 via the connecting nut 44 .

[0084] In the above embodiment, the damper push-pull rod 26 is connected to the electric piston rod 45 via the connecting nut 44, and the operation is simple and fast.

[0085] Optionally, the pointer 43 is close to the connecting nut 44. This helps to smoothly read the adjustment state of the barrel-shaped damper 2.

[0086] In a specific embodiment, the barrel-shaped damper 2 is made of ZG40Cr30Ni16Si2NRe high-toughness heat-resistant steel. The barrel-shaped damper 2 surrounds the outside of the main body 1 and has two fixing ears 22 equally distributed 360 degrees on the outside of the barrel-shaped damper 2. The fixing ears 22 are provided with fixing grooves 23, guide wheels 24, and dust cleaning brushes 25 below. The guide wheels 24 are placed on the anti-stuck guide rail 21, and each fixing ear 22 has a damper push-pull rod 26 on the outside.

[0087] The material of the anti-stuck guide rail 21 is ZG40Cr30Ni16Si2NRe high-toughness heat-resistant steel, and its cross-sectional shape is a semicircular upper portion and a rectangular lower portion. Figure 5 The fixed ear 22 located below the barrel-shaped damper 2 is in direct contact with the guide wheel 24 and the dust cleaning brush 25. The guide wheel 24 is used to lift the barrel-shaped damper 2 on the anti-stuck guide rail 21 to reduce the friction of the adjustment and effectively clean the dust accumulated on the anti-stuck guide rail 21.

[0088] There are two fixing grooves 23 under each fixing ear 22 for placing the guide wheel 24. The fixing grooves 23 can reduce the dust on the guide wheel 24 as much as possible. At the same time, a dust cleaning brush 25 is fixed in front and behind the fixing grooves 23. Figure 3 .

[0089] The guide wheel 24 is made of ZG40Cr30Ni16Si2NRe high-toughness heat-resistant steel. A cleaning brush 25 is fixed at the edge of the fixing groove 23 in front and behind the guide wheel 24. Figure 3 、 4 、5.

[0090] The damper push-pull rod 26 is made of Q355 and is installed and fixed on the front side of the fixed ear 22. It passes through the pipe wall and the pull rod sleeve 3 outward. A pointer 43 is fixed at the outward end of the damper push-pull rod 26, and then it is connected to the electric piston rod 45 through the connecting nut 44, and the push-pull power of the electric piston rod 45 is transmitted to the fixed ear 22 to drive the barrel-shaped damper 2 to move.

[0091] The body 36 of the pull rod sleeve 3 is made of Q355 and is divided into two equal parts 360 degrees with the central axis of the main body 1 as the center. It is used to isolate the air duct from the outside world, ensuring the sealing effect while ensuring the back and forth movement of the damper push-pull rod 26.

[0092] The material of the high temperature resistant sealing ring 32 is polytetrafluoroethylene, and it is located at the outer end of the pull rod sleeve 3 and is designed concentrically with it, isolating the internal and external environments while ensuring that the pull rod sleeve 3 can be pulled freely.

[0093] The annular air chamber 33 is located at the tail end of the pull rod sleeve 3 and is hollowed out inside to form an annular cavity. It is designed as a concentric circle with the pull rod sleeve 3. The front end is connected to the purge pipe 31, and the rear end is connected to the spiral nozzle 34 divided into three equal parts of 360 degrees, distributing the wind to these three spiral nozzles 34 at the same time.

[0094] The spiral nozzle 34 is located inside the tail end of the pull rod sleeve 3 and is distributed in three equal parts of 360 degrees concentric with the pull rod sleeve 3. At the same time, it spirally extends into the air duct, so that the gas ejected into the air duct is spirally propelled inward around the damper push-pull rod 26 in the pull rod sleeve 3, achieving the purpose of blowing away dust without dead angles.

[0095] The spiral spoiler flaps 35 are made of Q355 and are located inside the pull rod sleeve 3 and are distributed in three equal parts of a 360-degree concentric circle with the pull rod sleeve 3 . They can further strengthen the surrounding effect of the spiral purge wind blown out by the spiral nozzle 34 by the gradually weakened surrounding wind.

[0096] The driving mechanism 4 is composed of a fixed support frame 41, an opening scale 42, a pointer 43, a connecting nut 44, an electric piston rod 45, an electric piston cylinder 46, a servo motor 47, a power switching clutch 48, a hand control panel 49 and other components. It is located on the outer wall of the air duct and is used to adjust and control the opening of the barrel-shaped damper 2.

[0097] The material of the fixed support frame 41 is Q355 angle iron, which is distributed in two equal parts of 360 degrees with the axis of the main body 1 as the center. One end is welded and fixed to the outer wall of the pipeline (i.e. the pipe wall). An opening scale 42 is provided on the upper position of the middle section. The tail end is fixed with an electric piston cylinder 46 and a servo motor 47, which are used to support the fixed electric piston cylinder 46 to do work.

[0098] The opening scale 42 is made of 340 stainless steel and is located above the middle section of the fixed support frame 41. When the drive mechanism 4 is in manual adjustment mode, the damper push-pull rod 26 drives the pointer 43 to point to the position marked on the opening scale 42, providing instructions for on-site adjustment. Of course, the real-time scale can also be intuitively seen during remote automatic adjustment.

[0099] The pointer 43 is made of 340 stainless steel and is located at the outer end of the damper push-pull rod 26 close to the connecting nut 44. Its function is to point to the corresponding scale of the opening scale 42 when adjusting, indicating the real-time opening value.

[0100] The connecting nut 44 is made of 340 stainless steel, and the end of the damper push-pull rod 26 and the end of the electric piston rod 45 are connected and fixed by the connecting nut 44. The main purpose is to facilitate disassembly, repair, maintenance, etc.

[0101] The electric piston rod 45 is placed in the electric piston cylinder 46 and can move back and forth. The power of the servo motor 47 and the torque of the internal structure are transmitted to the damper push-pull rod 26 through the electric piston rod 45. Note: The two must run synchronously at the same time, otherwise they will go off track and get stuck. Figure 1 , Figure 2 , Figure 3 .

[0102] An electric piston rod 45 is provided inside the electric piston cylinder 46 , a power switching clutch 48 and a hand control panel 49 are provided at the tail, and a servo motor 47 is provided on the side of the tail. The function of the electric piston cylinder 46 is to increase the torque of the servo motor 47 by utilizing the special internal structure.

[0103] The servo motor 47 is located on the side of the tail of the electric piston cylinder 46 and is an automatically adjusted power source. It can execute remote commands and feed back the execution status to the remote operator. The execution status is synchronized with the values ​​shown by the opening scale 42 and the pointer 43.

[0104] The power switching clutch 48 is located at the connection between the electric piston cylinder 46 and the servo motor 47. Its function is to cut off the mechanical connection of the servo motor 47 and connect the mechanical connection of the hand control panel 49. The hand control panel 49 is used for manual adjustment to switch between remote automatic control and local manual control mode. Note: Both must be operated synchronously, otherwise the vehicle will deviate and get stuck. Figure 1 , Figure 2 , Figure 3 .

[0105] The hand-operated plate 49 is located at the tail of the electric piston cylinder 46 and is designed as a concentric circle with it. The power switching clutch 48 is used to disconnect the mechanical connection of the servo motor 47 while the hand-operated plate 49 is mechanically connected. At the same time, the opening indication is visually seen in conjunction with the opening scale 42 and the pointer 43, thus achieving the purpose of manual operation. Note: Both must be operated synchronously, otherwise the movement will deviate and get stuck. Figure 1 , Figure 2 , Figure 3 .

[0106] In the embodiment of the present application, the damper anti-stuck device for automatic control of the burner air volume is improved from a conventional damper structure to a new structural concept, which effectively reduces the impact of dust accumulation and improves the smoothness of adjustment. It utilizes a new dust cleaning structure and the intervention of electric automatic control to greatly improve the working reliability of the equipment. First, the barrel damper 2 is inserted into the burner air inlet device (i.e., the main body 1) so that the barrel damper 2 surrounds the burner air inlet device in a surrounding shape. The bottom of the two fixed ears 22 of the barrel damper 2 each have two fixed grooves 23, and each fixed groove 23 is installed with a guide wheel 24. The four guide wheels 24 are placed on two transversely fixed anti-stuck guide rails 21. A cleaning brush 25 is welded and fixed to the front and rear edges of each fixed groove 23, and a damper push-pull rod 26 is welded and fixed to each of the two fixed ears 22. The two damper push-pull rods 26 pass through the outer wall of the pipe (i.e., the pipe wall) and then pass through the two symmetrically distributed pull rod sleeves 3 fixed on the pipe wall. At the same time, a pointer 43 is fixed to the tail end of the damper push-pull rod 26, and the damper push-pull rod 26 is connected to the electric piston rod 45 through the connecting nut 44. The electric piston rod 45 and the electric piston cylinder 46, the servo motor 47, the power switching clutch 48, and the hand control panel 49 are designed as one body (see Figure 1 、 Figure 2 、 Figure 3 Figure 1 Figure 2 Figure 3), is fixed on the outer wall of the pipeline by welding of a fixed support frame 41 to serve as a fixed support point. Moreover, an opening scale 42 is provided at a position corresponding to the fixed support frame 41 and the pointer 43 to achieve automatic control of the barrel-shaped damper 2.

[0107] For example, when the servo motor 47 receives the instruction, it amplifies the torque of the servo motor 47 through the electric piston cylinder 46 and the electric piston rod 45 to drive the damper push-pull rod 26. At the same time, the drive mechanism 4 also feeds back the real-time opening parameters to the remote operator. At this time, the damper push-pull rod 26 first enters the pull rod sleeve 3 through the high-temperature resistant sealing ring 32, and the pull rod sleeve 3 blows the compressed air into the annular wind chamber 33 through the purge pipe 31, and then distributes the compressed air to the spiral nozzles 34 distributed in 360 degrees through the annular wind chamber 33; since the air outlet of the spiral nozzle 34 in the pull rod sleeve 3 is spirally blown out, the blown wind is blown into the pipe in a spiral shape in the pull rod sleeve 3; moreover, the spiral spoiler flap 35 provided in the middle of the pull rod sleeve 3 will once again strengthen the surrounding effect of the spiral purge wind blown out by the spiral nozzle 34 with the gradually weakened surrounding wind to achieve a dead-angle blowing effect. Furthermore, the damper push-pull rod 26 passes through the pull rod sleeve 3 and then transmits force to the fixed ear 22 to drive the barrel damper 2 to change the opening of the air inlet 12. However, the closing limit 11 and the opening limit 13 on the burner air inlet device (i.e., the main body 1) can effectively limit the over-adjustment of the maximum and minimum openings of the barrel damper 2.

[0108] In addition, when the damper anti-stuck device of the automatic air volume control of the burner needs to be manually adjusted when necessary, the power switching clutch 48 can be operated to switch the power mechanical connection of the servo motor 47 to the hand control panel 49. While adjusting the opening with the hand control panel 49, the opening scale 42 and the pointer 43 can be referred to to determine the adjustment status. At the same time, the feedback of the actual opening on site can also be seen remotely. After the on-site adjustment is completed, the power switching clutch 48 can be switched back to the servo motor 47 drive mode. The operation is simple and convenient.

[0109] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A damper anti-stuck device for automatic control of burner air volume, characterized in that: include: A main body and a barrel-shaped damper, wherein the main body is provided with a plurality of air inlets spaced apart along the circumference; the barrel-shaped damper is movably sleeved on the outer side of the air inlet of the main body; An anti-stuck unit, comprising an anti-stuck guide rail, a fixing ear, a guide wheel, a dust cleaning brush and an air door push-pull rod; the anti-stuck guide rail is provided on the main body, and the anti-stuck guide rail is distributed along the axial direction of the main body; the outer side of the barrel-shaped air door is provided with the fixing ear; a fixing groove is provided below the fixing ear, the guide wheel is installed in the fixing groove, and the guide wheel is in sliding contact with the anti-stuck guide rail; the dust cleaning brush is provided in the fixing groove, and the two dust cleaning brushes are respectively located on the front and rear sides of the guide wheel, and the bottom of the dust cleaning brush is in close contact with the anti-stuck guide rail; one end of the air door push-pull rod is connected to the fixing ear; a driving mechanism, the other end of the damper push-pull rod being connected to the driving mechanism; The damper push-pull rod moves along the axial direction of the main body under the action of the driving mechanism, and drives the barrel-shaped damper to move through the anti-stuck unit to adjust the opening length of the air inlet; wherein, when the anti-stuck unit moves, the dust cleaning brush contacts the guide wheel and the anti-stuck guide rail in front of the movement to remove dust accumulated on the anti-stuck guide rail.

2. The damper anti-stuck device for automatic burner air volume control according to claim 1, characterized in that: The two fixing ears are respectively located on opposite sides of the barrel-shaped damper; Two fixing grooves are provided below each of the fixing ears, and a guide wheel and two cleaning brushes located at the front and rear sides of the guide wheel are provided in each of the fixing grooves.

3. The damper anti-stuck device for automatic burner air volume control according to claim 2, characterized in that: Also includes closing limit and opening limit; The closing limit and the opening limit are both provided on the main body and are respectively located on opposite sides of the air inlet; When the barrel-shaped damper moves to completely close the air inlet, the barrel-shaped damper contacts the closing limit; When the barrel-shaped damper moves to fully open the air inlet, the barrel-shaped damper contacts the opening limit.

4. The damper anti-stuck device for automatic burner air volume control according to claim 3, characterized in that: It also includes a tube wall and a push-pull sleeve; the tube wall and the push-pull sleeve are provided on the main body, the tube wall is located on the side of the open limit away from the close limit, and the push-pull sleeve is located on the side of the tube wall away from the barrel-shaped damper; The damper push-pull rod passes through the tube wall and the push-pull sleeve in sequence and is connected to the driving mechanism located on the other side of the push-pull sleeve, and the damper push-pull rod is sealed and connected to the push-pull sleeve.

5. The damper anti-stuck device for automatic burner air volume control according to claim 4, characterized in that: The push-pull sleeve includes a body, a purge pipe, a sealing ring, an annular air chamber, a spiral nozzle and a spiral spoiler flap component; The annular air chamber is provided at one end of the body close to the driving mechanism, and the sealing ring is provided between the annular air chamber and the damper push-pull rod; the purge pipe is connected to the annular air chamber for blowing compressed air into the annular air chamber; The annular air chamber is connected to the spiral nozzle at one end away from the purge pipe, and the main body is provided with the spiral spoiler flap component to enhance the surrounding effect of the spiral purge wind blown out by the spiral nozzle.

6. The damper anti-stuck device for automatic burner air volume control according to claim 5, characterized in that: The driving mechanism includes an electric piston rod, an electric piston cylinder, a servo motor, a power switching clutch and a hand control panel; The electric piston rod is installed on the electric piston cylinder, and the end of the damper push-pull rod away from the barrel-shaped damper is connected to the electric piston rod; The servo motor is connected to the electric piston cylinder, and the electric piston cylinder is used to increase the torque of the servo motor; The power switching clutch is provided between the electric piston cylinder and the servo motor to cut off the mechanical connection between the servo motor and the electric piston cylinder and mechanically connect the hand control panel to the electric piston cylinder.

7. The damper anti-stuck device for automatic burner air volume control according to claim 6, characterized in that: The driving mechanism further includes a fixed support frame; One end of the fixed support frame is fixed to the pipe wall, and the other end is fixed with the electric piston cylinder and the servo motor; An opening scale is provided in the middle of the fixed support frame, and a pointer is provided on the side of the damper push-pull rod facing the opening scale.

8. The damper anti-stuck device for automatic burner air volume control according to claim 7, characterized in that: The pointer is made of stainless steel.

9. The damper anti-stuck device for automatic burner air volume control according to claim 8, characterized in that: The driving mechanism includes a connecting nut; The damper push-pull rod is connected to the electric piston rod through the connecting nut.

10. The damper anti-stuck device for automatic burner air volume control according to claim 9, characterized in that: The pointer is close to the connecting nut.

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