Boiler air flue anti-blocking structure

Abstract

The utility model relates to the technical field of air flue filter elements, and discloses a boiler air flue anti-blocking structure which comprises a filter frame, an air cylinder, an electric linear guide rail module, a dust collection mechanism and a dust collector, the air cylinder is arranged outside the filter frame in a sliding mode, and the electric linear guide rail module is assembled at the bottom of the air cylinder. The dust collection mechanism is assembled and connected to the output end of the electric linear guide rail module, the dust collector is communicated with the dust collection mechanism, the top plate is assembled outside the filter frame, the dust collection mechanism comprises a suction head, the outside of a corrugated pipe is communicated with the corrugated pipe, and the corrugated pipe is connected with the output end of the electric linear guide rail module. And a cross arm is assembled at the top of the corrugated pipe. According to the anti-blocking structure of the boiler air flue, structural looseness caused by long-term vibration is avoided, meanwhile, through the direct connection design of the dust collector and the dust collection mechanism, it is guaranteed that dust is sucked away instantly, secondary deposition of raised dust is prevented, and the continuous through-flow capacity of the air flue is fundamentally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air and flue gas filter elements, and specifically relates to an anti-blocking structure for a boiler air and flue gas duct. Background Art

[0002] The anti-blocking structure for a boiler air and flue gas duct belongs to the technical field of operation and maintenance of boiler equipment, and mainly proposes an improvement scheme for the problem of reduced flow efficiency caused by ash deposition in the air and flue gas ducts during the operation of industrial boilers. During the long-term operation of the boiler, fly ash generated by fuel combustion will gradually accumulate on the inner wall of the air and flue gas ducts, forming ash accumulation layers of different shapes. These deposits will not only reduce the cross-sectional area of the pipeline and increase the system resistance, but may even cause blockage accidents in severe cases, affecting the boiler thermal efficiency and operation safety.

[0003] Traditional ash cleaning methods for air and flue gas ducts mostly rely on manual cleaning at regular intervals or the use of fixed ash cleaning devices. The former requires shutdown operations and has a high labor intensity, while the latter has the defect of limited cleaning scope. Existing ash cleaning mechanisms usually adopt a single-direction drive structure, and the dust suction component can only reciprocate along a single path, making it difficult to cover complex-shaped ash accumulation areas, especially having a poor treatment effect on corner or non-planar deposition areas. Although some devices are equipped with an angle adjustment mechanism, they lack a dynamic support structure, and the suction head is prone to deviation due to vibration during movement, affecting the cleaning stability. In addition, in the traditional structure, the dust suction component and the dust removal equipment are mostly connected by hoses, and dust return caused by pipeline bending or blockage is likely to occur during operation, resulting in secondary pollution. The frame structure is prone to deformation and loosening under long-term vibration and impact, further shortening the equipment maintenance cycle. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides an anti-blocking structure for a boiler air and flue gas duct to solve the above technical problem that the suction head is prone to deviation due to vibration during movement, affecting the cleaning stability.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an anti-blocking structure for a boiler air and flue gas duct, including: a filter frame, a top plate, a cylinder, an electric linear guide module, a dust suction mechanism, and a vacuum cleaner. The cylinder is slidably arranged outside the filter frame. The electric linear guide module is assembled at the bottom of the cylinder. The dust suction mechanism is assembled and connected to the output end of the electric linear guide module. The vacuum cleaner is communicated with the dust suction mechanism. The top plate is assembled outside the filter frame. The dust suction mechanism includes a suction head. A corrugated pipe is communicated with the outside of the suction head. The corrugated pipe is connected to the output end of the electric linear guide module. A cross arm is assembled at the top of the corrugated pipe, and the cross arm is connected to the suction head. The top of the cross arm is connected to a T-shaped arm through a hinge. A support arm is connected to the outside of the T-shaped arm. The support arm is connected to the top of the output end of the electric linear guide module.

[0006] Preferably, a filter element made of stainless steel sintered felt is embedded in the inner cavity of the filter frame, and its edge is pressed against the inner wall of the filter frame by a sealing strip. Four sets of mounting holes with M12 specifications are arranged on the outside of the filter frame, and the holes are distributed in a rectangular array to adapt to different specifications of boiler flue duct flanges.

[0007] Preferably, an assembly plate formed by laser cutting is assembled at the output end of the cylinder. The assembly plate is connected to the base of the electric linear guide module through four sets of socket head cap screws. An arc-shaped adjustment groove is arranged on the surface of the assembly plate, and the installation angle can be finely adjusted by ±5°.

[0008] Preferably, the air inlet of the vacuum cleaner is connected with a hose made of polyurethane through a hose clamp. The hose is connected with a corrugated pipe through a flare fitting. The inner wall of the hose is coated with a Teflon coating to reduce dust adhesion.

[0009] Preferably, a sealing sleeve made of silicone is sleeved outside the hose. A rubber sleeve made of nitrile rubber is assembled outside the sealing sleeve. Diamond-shaped anti-slip patterns are pressed on the surface of the rubber sleeve to enhance the friction with the corrugated pipe.

[0010] Preferably, a return spring made of 304 stainless steel is assembled at the bottom of the corrugated pipe. Both ends of the return spring are welded and fixed to the bottom flange of the corrugated pipe and the cross arm through spring seats respectively, and the suction head can be automatically lifted to a safe height in the power-off state.

[0011] Compared with the prior art, the utility model provides a boiler flue duct anti-blocking structure, which has the following beneficial effects:

[0012] In this boiler flue duct anti-blocking structure, through the coordinated drive of the cylinder and the electric linear guide module, the dust suction mechanism can perform multi-dimensional movement along the surface of the filter frame, realizing the automatic cleaning of the ash accumulation in the flue duct, significantly reducing the frequency of manual intervention and improving the maintenance efficiency. The combined design of the corrugated pipe and the cross arm in the dust suction mechanism endows the suction head with flexible angle adjustment ability, which can adapt to different forms of ash accumulation areas. Combined with the articulated structure of the T-shaped arm and the support arm, a dynamic support is formed during the driving process of the electric linear guide module, which not only ensures the working stability of the suction head, but also expands the cleaning range of a single operation through the lever effect, effectively reducing the cleaning dead angle. The assembly structure of the top plate and the filter frame enhances the anti-deformation ability of the overall frame, avoiding the structural loosening caused by long-term vibration. At the same time, the direct connection design of the vacuum cleaner and the dust suction mechanism ensures the instant extraction of dust, preventing the secondary deposition of dust, and fundamentally improving the continuous flow capacity of the flue duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a front view of the utility model;

[0014] Figure 2 is an external view of the filter frame of the utility model;

[0015] Figure 3 This is an external schematic diagram of the dust suction mechanism of the present utility model.

[0016] In the figure: 1. Filter frame; 11. Filter element; 2. Top plate; 3. Cylinder; 31. Assembly plate; 4. Electric linear guide module; 5. Dust suction mechanism; 51. Suction head; 52. Bellows; 53. Cross arm; 54. T-shaped arm; 55. Support arm; 56. Return spring; 6. Vacuum cleaner; 61. Hose; 62. Sealing sleeve. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] The present utility model provides a technical solution. Please refer to Figure 1 and Figure 2 and Figure 3 , a boiler air duct anti-blocking structure, comprising: a filter frame 1, a top plate 2, a cylinder 3, an electric linear guide module 4, a dust suction mechanism 5 and a vacuum cleaner 6. The cylinder 3 is slidably arranged outside the filter frame 1, and its cylinder body is slidably matched with the guide rail on the side wall of the filter frame 1 through a linear bearing. The end of the piston rod of the cylinder 3 is equipped with a fine adjustment nut for adjusting the vertical height to adapt to the air duct environment with different installation heights; the electric linear guide module 4 is assembled at the bottom of the cylinder 3 through bolts, and its guide rail direction is arranged parallel to the axis of the filter frame 1; the dust suction mechanism 5 is assembled and connected to the output end of the electric linear guide module 4, and the vacuum cleaner 6 is communicated with the dust suction mechanism 5 through a hose 61; the top plate 2 is assembled outside the filter frame 1 through an L-shaped angle code, and a strip hole for passing through the piston rod of the cylinder 3 is opened on its surface.

[0019] The dust suction mechanism 5 includes a conical suction head 51, the outside of which is connected to a bellows 52, the bellows 52 is made of high-temperature resistant silicone material, and a spiral reinforcing rib is pressed on its surface to prevent negative pressure from sucking and shrinking; the bellows 52 is connected to the output end of the electric linear guide module 4 through a flange, and a cross arm 53 made of aluminum alloy is installed on its top, and the cross arm 53 is connected to the suction head 51 through a universal joint; the top of the cross arm 53 is connected to a T-shaped arm 54 through a hinge, and the outside of the T-shaped arm 54 is connected to a support arm 55 made of carbon fiber through a bearing, and the support arm 55 is connected to the top of the output end of the electric linear guide module 4 through an adapter block. When the electric linear guide module 4 is running, the T-shaped arm 54 and the support arm 55 form a parallelogram mechanism, which can keep the suction head 51 always perpendicular to the surface of the filter element 11, and at the same time, when the suction head 51 moves to the bottom of the filter frame 1, it can be driven by the top plate 2 to drive the suction head 51 to rotate, thereby cleaning the bottom of the inner cavity of the air duct.

[0020] A filter element 11 made of stainless steel sintered felt is embedded in the inner cavity of the filter frame 1, and its edge is pressed against the inner wall of the filter frame 1 by a sealing strip. Four groups of M12 installation holes are opened on the outside of the filter frame 1, and the holes are distributed in a rectangular array to adapt to boiler duct flanges of different specifications.

[0021] The output end of the cylinder 3 is equipped with a laser-cut assembly plate 31, which is connected to the base of the electric linear guide module 4 through four sets of hexagonal bolts. The surface of the assembly plate 31 is provided with an arc-shaped adjustment groove, which can achieve fine adjustment of the installation angle of ±5°.

[0022] The air inlet of the vacuum cleaner 6 is connected to a hose 61 made of polyurethane through a throat clamp. The hose 61 is connected to the bellows 52 through a pagoda joint. The inner wall of the hose 61 is coated with a Teflon coating to reduce dust adhesion.

[0023] The outside of the hose 61 is sheathed with a sealing sleeve 62 made of silicone material, and the outside of the sealing sleeve 62 is equipped with a rubber sleeve made of nitrile rubber material. The surface of the rubber sleeve is pressed with diamond-shaped anti-skid patterns to enhance the friction with the bellows 52.

[0024] The bottom of the bellows 52 is equipped with a return spring 56 made of 304 stainless steel. The two ends of the return spring 56 are welded and fixed to the bottom flange of the bellows 52 and the cross arm 53 through spring seats, and the suction head 51 can be automatically lifted to a safe height when the power is off.

[0025] In this solution, the installation and debugging stage is carried out first. The operator embeds the filter frame 1 into the boiler air duct flange and fixes it using the four groups of M12 mounting holes on its exterior. The filter element 11 forms an airtight structure with the inner wall of the filter frame 1 through a sealing rubber strip. The cylinder 3 is matched with the side wall guide rail of the filter frame 1 through a linear bearing. The fine-tuning nut at the end of its piston rod is vertically adjusted according to the height of the air duct. At the same time, the arc-shaped adjustment groove of the assembly plate 31 realizes an angle correction of ±5°, ensuring that the electric linear guide rail module 4 is precisely parallel to the axis of the filter frame 1.

[0026] When entering the working state, the electric linear guide rail module 4 starts, and its output end drives the dust suction mechanism 5 to reciprocate along the axis of the filter frame 1. During the movement, the 304 stainless steel return spring 56 connects the bottom flange of the bellows 52 and the cross arm 53 through a spring seat to maintain the initial safe height of the suction head 51. When the guide rail module operates, the parallelogram mechanism formed by the T-shaped arm 54 and the support arm 55 starts to function: the carbon fiber support arm 55 is synchronously displaced with the output end of the guide rail through an adapter block, driving the T-shaped arm 54 to rotate around the hinge point. The cross arm 53 converts the rotational motion into the vertical displacement of the suction head 51 through a universal joint, ensuring that the conical suction head 51 always maintains a perpendicular contact with the surface of the filter element 11.

[0027] During the dust suction operation stage, the vacuum cleaner 6 generates negative pressure through the polyurethane hose 61. The Teflon coating on the inner wall of the hose 61 prevents dust adhesion. The external silicone seal 62 and the rubber sleeve made of nitrile rubber enhance the sealing performance with the bellows 52 through diamond patterns. The high-temperature resistant silicone bellows 52 maintains its pipe shape through spiral reinforcing ribs under the action of negative pressure. Its top flange plate moves with the output end of the electric linear guide rail module 4, driving the aluminum alloy cross arm 53 to move synchronously. When the suction head 51 moves to the bottom area of the filter frame 1, mechanical contact occurs between the edge of the strip hole of the top plate 2 and the T-shaped arm 54, forcing the parallelogram mechanism to deform, causing the suction head 51 to deflect ±15° around the universal joint to specifically clean the sediment at the bottom of the inner cavity of the air duct.

[0028] After the cleaning operation is completed, the system enters the reset stage: the electric linear guide rail module 4 stops running, and the return spring 56 releases elastic potential energy to lift the bellows 52 and the cross arm 53 to a safe height to prevent thermal damage to the suction head 51 caused by high-temperature flue gas. The cylinder 3 can adjust the vertical position again according to needs to adapt to the maintenance requirements of filter elements 11 with different heights. The whole process realizes the full-coverage cleaning of the surface of the filter element 11 and the bottom of the air duct through the cooperation of mechanical linkage and elastic elements. The stainless steel sintered felt filter element 11 continuously filters the particulate matter in the flue gas to ensure the smoothness of the air flue.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler air duct and flue anti-blocking structure, comprising: A filter frame (1), a top plate (2), a cylinder (3), an electric linear guide module (4), a dust suction mechanism (5) and a vacuum cleaner (6). The cylinder (3) is slidably arranged outside the filter frame (1). The electric linear guide module (4) is assembled at the bottom of the cylinder (3). The dust suction mechanism (5) is assembled and connected to the output end of the electric linear guide module (4). The vacuum cleaner (6) is communicated with the dust suction mechanism (5). The top plate (2) is assembled outside the filter frame (1). It is characterized in that: the dust suction mechanism (5) includes a suction head (51). A bellows (52) is communicated with the outside of the suction head (51). The bellows (52) is connected to the output end of the electric linear guide module (4). A cross arm (53) is assembled at the top of the bellows (52), and the cross arm (53) is connected to the suction head (51). A T-shaped arm (54) is connected to the top of the cross arm (53) through a hinge. A support arm (55) is connected to the outside of the T-shaped arm (54). The support arm (55) is connected to the top of the output end of the electric linear guide module (4).

2. The anti-blocking structure of the boiler air duct according to claim 1, characterized in that: A filter element (11) is embedded in the inner cavity of the filter frame (1). Mounting hole positions are provided outside the filter frame (1).

3. The anti-blocking structure of the boiler air duct according to claim 1, characterized in that: An assembly plate (31) is assembled at the output end of the cylinder (3). The assembly plate (31) is connected to the electric linear guide module (4).

4. The anti-blocking structure of a boiler air duct according to claim 1, characterized in that: An air inlet of the vacuum cleaner (6) is communicated with a hose (61). The hose (61) is communicated with the bellows (52).

5. A boiler air and flue gas anti-blocking structure according to claim 4, characterized in that: A sealing sleeve (62) is sleeved outside the hose (61). A rubber sleeve is assembled outside the sealing sleeve (62).

6. The anti-blocking structure of the boiler air and flue duct according to claim 1, characterized in that: A return spring (56) is assembled at the bottom of the bellows (52). Two ends of the return spring (56) are respectively welded to the bottom flange of the bellows (52) and the cross arm (53).

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