Air connecting pipe for low-nitrogen condensing boiler

Abstract

The utility model relates to the technical field of low-nitrogen condensing boilers, in particular to an air connecting pipe for a low-nitrogen condensing boiler, which comprises an elbow pipe, a shell, a cylindrical rotating seat rotatably connected in the shell, and a driving component used for driving the rotating seat to rotate, the two ends of the shell communicate with the elbow pipe through an air inlet pipe and an air outlet pipe correspondingly, a plurality of through holes are formed in the rotating seat, filter screens are detachably connected into the through holes, the driving assembly is installed on the shell, and the through hole rotating to the uppermost end communicates with the air inlet pipe and the air outlet pipe; the number of the through holes is at least four, and the at least four through holes are arranged at equal angles with the axis of the rotating base as the center. When the filter screen needs to be replaced, the driving assembly drives the rotating seat to rotate, and the filter screen can be replaced by replacing the opposite through holes between the air inlet pipe and the air outlet pipe; according to the utility model, the filter screen can be detached and replaced without closing the elbow pipe, so that the stability of the low-nitrogen condensing boiler in use is ensured.

Description

Technical Field

[0001] This utility model relates to the field of low-NOx condensing boiler technology, specifically to an air connection pipe for a low-NOx condensing boiler. Background Technology

[0002] The low-NOx condensing boiler consists of a modular aluminum alloy body, an external base, a combustion system, an air filtration system, an air supply system, and an electrical control system. The air filtration system includes an air filter, an air silencer, and an air pipe connecting the air filter to the fan. Traditional air pipes are inconvenient for installing filters; filter replacement, installation, and removal are difficult, time-consuming, and labor-intensive. Without a filter, the air pipe is prone to clogging, leading to frequent replacements and affecting the normal operation of the entire low-NOx condensing boiler, posing a significant safety hazard. Therefore, Chinese Patent CN215027060U discloses an air pipe for a low-NOx condensing boiler, including a main air pipe and a filter. The main air pipe has an installation ring for installing the filter. The inner wall of the installation ring has an inner ring with several evenly spaced filter-fixing components. Each filter-fixing component includes a chassis with connecting posts. The edge of the filter is installed within the installation ring by wrapping and knotting it with the connecting posts. The air inlet of this low-NOx condensing boiler is equipped with a detachable mounting ring with a connecting post. The connecting post is used to wrap and fix the edge of the filter screen. This screen fixing assembly facilitates the installation, removal and replacement of the filter screen. The installation of the mounting ring can be selected or not depending on the installation site and usage requirements of the air main pipe. A binding post is provided to prevent the filter screen edge from slipping off, improving the stability and firmness of the filter screen installation.

[0003] However, in practical applications, the above-mentioned air connection has the following shortcomings: When disassembling and replacing the filter screen, the elbow pipe must be closed before the main air pipe can be disassembled and replaced, and the filter screen needs to be replaced frequently. Therefore, the nitrogen condensing boiler needs to be shut down frequently for maintenance and replacement, which greatly reduces the stability of the low-nitrogen condensing boiler during use. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned shortcomings by providing an air connection pipe for a low-NOx condensing boiler that allows for filter screen disassembly and replacement without closing the elbow pipe, thus ensuring the stability of the low-NOx condensing boiler during use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An air connection pipe for a low-NOx condensing boiler includes an elbow pipe, characterized in that: a shell, a cylindrical rotating seat rotatably connected inside the shell, a drive assembly for driving the rotating seat to rotate, the two ends of the shell being connected to the elbow pipe through an air inlet pipe and an air outlet pipe respectively, the rotating seat having multiple through holes, each through hole having a filter screen detachably connected to it, the drive assembly being mounted on the shell, the uppermost through hole being connected to the air inlet pipe and the air outlet pipe; at least four through holes are provided, and at least four through holes are arranged at equal angles around the axis of the rotating seat.

[0007] Furthermore, the left and right replacement holes are provided on opposite sides of the outer casing, and the through hole at the bottom connects the left and right replacement holes.

[0008] Furthermore, the rotating seat is provided with an annular recess, and one side of the outer shell is provided with an opening opposite the annular recess. The driving assembly includes an external gear disposed in the annular recess, a spur gear extending into the opening, and a stepper motor used to drive the spur gear to rotate. The stepper motor is fixed on the outer shell, and the spur gear extends into the outer shell from the opening and meshes with the external gear.

[0009] Furthermore, an annular groove is provided at one end of the through hole, and the filter screen includes a fixing ring and a mesh body fixed inside the fixing ring, with the fixing ring slidably connected to the annular groove.

[0010] Furthermore, a permanent magnet ring is provided at one end of the fixed ring, and a permanent magnet is provided in the groove of the annular groove. The permanent magnet ring and the permanent magnet attract each other magnetically, and the opening of the annular groove faces the air inlet pipe.

[0011] The beneficial effects of this utility model are:

[0012] In practical applications, when the filter screen needs to be replaced, the drive assembly drives the rotating seat to rotate, and the filter screen can be replaced by changing the through hole that is directly opposite between the air inlet pipe and the air outlet pipe. This utility model can also disassemble and replace the filter screen without closing the elbow pipe, ensuring the stability of the low-NOx condensing boiler during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a top view of the present invention;

[0015] Figure 3 yes Figure 2 Cross-sectional view at point AA;

[0016] Figure 4 yes Figure 2 Cross-sectional view at point BB;

[0017] Reference numerals: 1. Elbow pipe; 2. Outer casing; 21. Inlet pipe; 22. Outlet pipe; 23. Left replacement hole; 24. Right replacement hole; 3. Rotating seat; 31. Through hole; 31. Annular groove; 32. Annular indentation; 33. Opening; 4. Filter screen; 41. Fixing ring; 42. Mesh body; 43. Permanent magnet ring one; 44. Permanent magnet two; 51. External gear; 52. Spur gear; 53. Stepper motor. Detailed Implementation

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an air connection pipe for a low-NOx condensing boiler includes an elbow pipe 1, characterized by: a housing 2, a cylindrical rotating seat 3 rotatably connected inside the housing 2, a drive assembly for driving the rotating seat 3 to rotate, the two ends of the housing 2 being connected to the elbow pipe 1 via an air inlet pipe 21 and an air outlet pipe 22 respectively, the rotating seat 3 being provided with a plurality of through holes 31, a filter screen 4 being detachably connected to each through hole 31, the drive assembly being mounted on the housing 2, the uppermost through hole 31 being connected to the air inlet pipe 21 and the air outlet pipe 22; at least four through holes 31 are provided, and at least four through holes 31 are arranged at equal angles with the axis of the rotating seat 3 as the center.

[0019] Furthermore, the left and right replacement holes 23 and 24 are provided on the left and right sides of the outer casing 2, and the through hole 31 at the bottom is connected to the left replacement hole 23 and the right replacement hole 24. In this embodiment, the filter screen 4 in the through hole 31 can be taken out and replaced through the left replacement hole 23 and the right replacement hole 24.

[0020] Furthermore, the rotating seat 3 is provided with an annular recess 32, and one side of the outer shell 2 is provided with an opening 33 facing the annular recess 32. The driving assembly includes an external gear 51 disposed in the annular recess 32, a spur gear 52 extending into the opening 33, and a stepper motor 53 used to drive the spur gear 52 to rotate. The stepper motor 53 is fixed on the outer shell 2, and the spur gear 52 extends into the outer shell 2 from the opening 33 and meshes with the external gear 51. In this embodiment, the stepper motor 53 drives the spur gear 52 to rotate, and the spur gear 52 drives the external gear 51 and the rotating seat 3 to rotate, thereby changing the through hole 31 connecting the air inlet pipe 21 and the air outlet pipe 22.

[0021] Furthermore, an annular groove 311 is provided at one end of the through hole 31, and the filter screen 4 includes a fixing ring 41 and a mesh body 42 fixed in the fixing ring 41. The fixing ring 41 is slidably connected to the annular groove 311. In this embodiment, the mesh body 42 can be slidably connected in the through hole 31 by the fixing ring 41 being slidably connected to the annular groove 311.

[0022] Furthermore, a permanent magnet ring 43 is provided at one end of the fixing ring 41, and a permanent magnet 44 is provided in the groove of the annular groove 311. The permanent magnet ring 43 and the permanent magnet 44 are magnetically attracted, and the opening 33 of the annular groove 311 faces the air inlet pipe 21. In this embodiment, the magnetic attraction between the permanent magnet ring 43 and the permanent magnet 44 can limit the fixing ring 41 to a certain extent, preventing it from sliding and producing abnormal noise during use. When disassembling and replacing the filter screen 4, rotate the through hole 31 to be replaced to the lowest end, insert a finger into the right replacement hole 24 and push the mesh 42 to the left to overcome the attraction between the permanent magnet ring 43 and the permanent magnet 44. The fixing ring 41 slides to the left along the annular groove 311, and the filter screen 4 in the through hole 31 can be taken out through the left replacement hole 23. The new filter screen 4 can then be inserted through the left replacement hole 23.

[0023] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. A low-nitrogen air connection for a condensing boiler comprising an elbow pipe, characterized in that: The utility model provides a filter, which comprises a shell, a cylindrical rotating seat rotatably connected in the shell, a driving assembly for driving the rotating seat to rotate, and an air inlet pipe and an air outlet pipe respectively connected with the shell at two ends of the shell and communicated with a bend pipe, wherein a plurality of through holes are arranged on the rotating seat, a filter screen is detachably connected in the through holes, the driving assembly is installed on the shell, and the through hole at the uppermost end is communicated with the air inlet pipe and the air outlet pipe. The through holes are arranged at equal angles with the axis of the rotating seat as the center.

2. A low-nitrogen air pipe for a condensing boiler according to claim 1, characterized in that The left and right sides of the shell are respectively provided with a left replacement hole and a right replacement hole, and the through hole at the lowermost end is communicated with the left replacement hole and the right replacement hole.

3. The low-nitrogen air pipe for condensing boilers according to claim 1, characterized in that, The rotating seat is provided with an annular recess, one side of the shell is provided with an opening opposite to the annular recess, the driving assembly comprises an external gear arranged in the annular recess, a straight gear extending into the opening, a stepping motor for driving the straight gear to rotate, the stepping motor is fixed on the shell, and the straight gear extends into the shell from the opening and is engaged with the external gear.

4. The low-nitrogen air pipe for condensing boilers according to claim 1, characterized in that, One end of the through hole is provided with an annular groove, the filter screen comprises a fixing ring, a mesh body fixed in the fixing ring, and the fixing ring is slidably connected with the annular groove.

5. A low-nitrogen air pipe for a condensing boiler according to claim 4, characterized in that One end of the fixing ring is provided with a permanent magnet ring one, the groove body of the annular groove is provided with a permanent magnet two, the permanent magnet ring one and the permanent magnet two are magnetically attracted, and the opening of the annular groove faces the air inlet pipe.

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