Circular flue variable cross-section flow guide device

Abstract

The present invention discloses a circular flue variable cross-section flow guide device, which includes a large circular ring, a small circular ring, a clamping mechanism, a driving motor, a gear shaft and a rotating shaft. The gear shaft is linearly pushed in or pulled out one level, so that a single ring of the circular ring or two rings can rotate simultaneously. The biggest innovation is that the variable diameter circular rings all move inside the flue, which can minimize the possibility of ash leakage and air leakage. The rotating shaft rotates at only two points, 0 degrees and 90 degrees, which is simple to move and can achieve the effect of multi-stage speed regulation. In actual industrial production applications, the required variable cross-sectional area can be adjusted accordingly according to different working conditions, the outlet flow rate can be increased, ash falling can be avoided or the outlet fluid pressure can be increased, and the utilization of resources can be maximized.

Description

Technical Field

[0001] The invention relates to the field of flues, and in particular to a variable-section flow guide device for a circular flue. Background Art

[0002] In the actual operation of boilers or sintering machines, low-load operation leads to a low flow rate at the bottom of the absorption tower. The low flow rate causes ash to fall at the bottom of the circular flue tower. In order to avoid ash falling, the circulating flue needs to replenish flue gas back to the bottom of the absorption tower, but replenishing the flue gas in the circulating flue is energy-consuming. In order to meet the basic requirement of more than 75% load operation of the subsequent desulfurization device, it must be operated at full load, which is energy-consuming.

[0003] When the boiler or sintering machine is running at low load, it is urgent to design an adjustable flow guide device to reduce the original tower bottom cross-section to achieve the purpose of speed increase without causing ash falling. Summary of the invention

[0004] The object of the present invention is to provide a circular flue variable cross-section flow guide device which can reduce and avoid ash falling.

[0005] A circular flue variable-section flow guide device comprises a large circular ring, a small circular ring, a clamping mechanism, a driving motor, a gear shaft and a rotating shaft, wherein the large circular ring and the small circular ring are coaxially connected in the circular flue, and the small circular ring is nested in the inner hole of the large circular ring; the rotating shaft is rotatably connected to one end of the circular flue, and one end of the rotating shaft extends outside the circular flue, and the clamping mechanism is arranged on one end side of the rotating shaft for clamping or loosening the rotating shaft; the other end of the rotating shaft is movably sleeved in the large circular ring and the small circular ring in turn, a stop portion is not provided at the other end of the rotating shaft, a stop groove matching the shape of the stop portion is provided on the inner wall of the small circular ring, and the stop portion is nested in the stop groove to limit relative rotation between the small circular ring and the rotating shaft.

[0006] A middle axis portion is provided on one end of the gear shaft, and an upper clamping plate and a lower clamping plate are respectively provided above and below the middle axis portion. The middle axis portion is movably sleeved in the large ring and the small ring in sequence, and the upper clamping plate is clamped on the upper end surfaces of the large ring and the small ring, and the lower clamping plate is clamped on the lower end surfaces of the large ring and the small ring. Pushing the gear shaft to slide can drive the upper clamping plate and the lower clamping plate to separate from the small ring respectively; a gear portion is provided in the middle portion of the gear shaft, and a driving wheel is fixed on the output shaft of the driving motor, and the driving wheel is meshed with the gear portion.

[0007] The outer diameter of the large circular ring is the same as the inner diameter of the circular flue, and the inner diameter of the large circular ring is the same as the outer diameter of the small circular ring.

[0008] The anti-rotation portion and the anti-rotation groove are both square.

[0009] The clamping mechanism is a hydraulic chuck.

[0010] It also includes a cylinder or an electric push rod for driving the gear shaft to slide.

[0011] The present invention adopts the above technology and has the following beneficial effects: pushing or pulling the gear shaft linearly one level can realize the rotation of a single ring or the simultaneous rotation of two rings. The biggest innovation is that the variable diameter rings all move inside the flue, which can minimize the possibility of ash leakage and gas leakage. The rotating shaft rotates only at two points, 0 degrees and 90 degrees, which is simple to move and can achieve the effect of multi-level speed regulation. In actual industrial production applications, the required variable cross-sectional area can be adjusted accordingly according to different working conditions to increase the outlet flow rate, avoid ash falling or increase the outlet fluid pressure, and maximize the use of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments;

[0013] Figure 1 A schematic diagram of the initial state of the present invention;

[0014] Figure 2 It is a schematic diagram of the primary diameter change of the present invention;

[0015] Figure 3 It is a schematic diagram of the secondary diameter change of the present invention;

[0016] Figure 4 is a schematic diagram of the gear shaft;

[0017] Figure 5 A schematic diagram of the rotating shaft. DETAILED DESCRIPTION

[0018] like Figure 1-5 As shown in one of the figures, the circular flue variable cross-section flow guide device of the present invention comprises a large circular ring 2, a small circular ring 3, a clamping mechanism 4, a driving motor 5, a gear shaft 6 and a rotating shaft 7, wherein the large circular ring 2 and the small circular ring 3 are coaxially connected in the circular flue 1, and the small circular ring 3 is nested in the inner hole of the large circular ring 2; the rotating shaft 7 is rotatably connected to one end of the circular flue 1, and one end of the rotating shaft 7 extends to the outside of the circular flue 1, and the clamping mechanism 4 is disposed on one end side of the rotating shaft 7 for clamping or loosening the rotating shaft 7; the other end of the rotating shaft 7 is movably sleeved in the large circular ring 2 and the small circular ring 3 in turn, and a stop portion 71 is not provided at the other end of the rotating shaft 7, and a stop groove matching the shape of the stop portion 71 is provided on the inner wall of the small circular ring 3, and the stop portion 71 is nested in the stop groove to limit relative rotation between the small circular ring 3 and the rotating shaft 7.

[0019] A middle axis portion 61 is provided on one end of the gear shaft 6, and an upper clamping plate 62 and a lower clamping plate 63 are respectively provided above and below the middle axis portion 61. The middle axis portion 61 is movably sleeved in the large circle 2 and the small circle 3 in sequence, and the upper clamping plate 62 is clamped on the upper end surfaces of the large circle 2 and the small circle 3, and the lower clamping plate 63 is clamped on the lower end surfaces of the large circle 2 and the small circle 3. Pushing the gear shaft 6 to slide can drive the upper clamping plate 62 and the lower clamping plate 63 to separate from the small circle 3 respectively; a gear portion 64 is provided in the middle portion of the gear shaft 6, and a driving wheel 51 is fixed on the output shaft of the driving motor 5, and the driving wheel 51 is meshed with the gear portion 64.

[0020] The outer diameter of the large circular ring 2 is the same as the inner diameter of the circular flue 1, and the inner diameter of the large circular ring 2 is the same as the outer diameter of the small circular ring 3. In this embodiment, the outer diameter of the large circular ring 2 and the inner diameter of the circular flue 1 are both 500 mm, the inner diameter of the large circular ring 2 and the outer diameter of the small circular ring 3 are both 400 mm, and the inner diameter of the small circular ring 3 is 300 mm.

[0021] The anti-rotation portion 71 and the anti-rotation groove are both square.

[0022] The clamping mechanism 4 is a hydraulic chuck.

[0023] The present invention also includes a cylinder or an electric push rod (not shown in the figure) for driving the gear shaft 6 to slide.

[0024] Working principle of the present invention:

[0025] The torus parallel to the airflow direction is 0 degrees, the torus perpendicular to the airflow direction is 90 degrees, and the reset state is set to the torus parallel to the airflow direction;

[0026] like Figure 2 As shown, in the system reset state, turn on the power and press the forward button, the drive motor 5 starts, and the gear shaft 6 rotates to drive the large ring 2 and the small ring 3 to rotate at the same time. When they rotate to 90°, the limit switch is triggered, the drive motor 5 stops working, and the large ring 2 and the small ring 3 stop rotating immediately. At this time, the pipe diameter changes from 500mm to 300mm. Press the reverse button of the drive motor 5 to reset the rings;

[0027] like Figure 3 As shown, pull the gear shaft 6 outward by one level. Now the gear shaft 6 does not contact the small ring 3 surface because the upper clamping plate 62 and the lower clamping plate 63 on the shaft are pulled out. The small ring 3 is not affected when rotating, so only the large ring 2 is controlled to rotate. The stopper 71 on the rotating shaft 7 is embedded and stuck in the stopper groove of the small ring 3, and the outer end is fixed. Start the driving motor 5 again for forward rotation. After the limit switch is triggered, the pipeline diameter changes from 500mm to 400mm, realizing multi-stage change of pipeline area and having multi-stage speed regulation function.

[0028] The implementation of the present invention is described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes. The above-mentioned specific implementation modes are illustrative rather than limiting the present invention. Those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A circular flue variable cross-section flow guide device, characterized in that: It comprises a large circular ring, a small circular ring, a clamping mechanism, a driving motor, a gear shaft and a rotating shaft. The large circular ring and the small circular ring are coaxially connected in a circular flue, and the small circular ring is nested in the inner hole of the large circular ring; the rotating shaft is rotatably connected to one end of the circular flue, and one end of the rotating shaft extends outside the circular flue. The clamping mechanism is arranged on one end of the rotating shaft for clamping or loosening the rotating shaft; the other end of the rotating shaft is movably sleeved in the large circular ring and the small circular ring in turn, a stopper is not provided at the other end of the rotating shaft, a stopper groove matching the shape of the stopper groove is provided on the inner wall of the small circular ring, and the stopper groove is nested in the stopper groove to limit the relative rotation between the small circular ring and the rotating shaft; A middle shaft portion is provided on one end of the gear shaft, and an upper clamping plate and a lower clamping plate are provided above and below the middle shaft portion, respectively. The middle shaft portion is movably sleeved in the large and small rings in sequence, and the upper clamping plate is clamped on the upper end surfaces of the large and small rings, and the lower clamping plate is clamped on the lower end surfaces of the large and small rings. Pushing the gear shaft to slide can drive the upper clamping plate and the lower clamping plate to separate from the small ring respectively; a gear portion is provided in the middle of the gear shaft, and a driving wheel is fixed on the output shaft of the driving motor, and the driving wheel is meshed with the gear portion; The outer diameter of the large circular ring is the same as the inner diameter of the circular flue, and the inner diameter of the large circular ring is the same as the outer diameter of the small circular ring; The anti-rotation portion and the anti-rotation groove are both square.

2. The circular flue variable cross-section flow guide device according to claim 1, characterized in that: The clamping mechanism is a hydraulic chuck.

3. The circular flue variable cross-section flow guide device according to claim 1, characterized in that: It also includes a cylinder or an electric push rod for driving the gear shaft to slide.

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