Variable frequency speed regulation transmission mechanism of cement kiln denitration rake type soot blower

Abstract

The present disclosure relates to the technical field of rake-type soot blower, and one embodiment of the present disclosure provides a variable-frequency speed-regulation transmission mechanism of a cement kiln denitration rake-type soot blower, which comprises an adjusting box, an adjusting pipe arranged in the adjusting box, a switching adjusting assembly arranged in the adjusting box, and a driving limiting assembly arranged in the adjusting box; the switching adjusting assembly comprises a driving cylinder, the telescopic end of a driving motor is provided with an adjusting shaft, the adjusting shaft is provided with a driving gear, the adjusting pipe is provided with a driven gear, and the driving gear and the driven gear are engaged. Through the above technical solution, the technical problem that in the fixed-speed motor driving mode in the prior art, the rotation speed of the soot blower cannot be dynamically adjusted according to the dust deposition thickness in the kiln, the flue gas flow rate and other working conditions, when the dust deposition amount increases, the fixed rotation speed may result in insufficient cleaning force of the rake arm, and the residual dust deposition affects the denitration efficiency; and when the dust deposition is less, high-speed operation causes energy waste and aggravates the wear of mechanical parts is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of rake sootblower technology, and more specifically, to a frequency conversion speed regulation transmission mechanism for a cement kiln denitrification rake sootblower. Background Technology

[0002] In cement kiln denitrification systems, the speed control of rake soot blowers directly affects the soot removal efficiency and system stability. Traditional transmission mechanisms use fixed-speed motors, which have significant technical defects in speed control.

[0003] In the fixed-speed motor drive mode, the speed of the soot blower cannot be dynamically adjusted according to the working conditions such as the thickness of ash accumulation in the kiln and the flue gas velocity. When the amount of ash accumulation increases, the fixed speed may result in insufficient ash removal force of the rake arm, and the ash residue will affect the denitrification efficiency. When there is less ash accumulation, high-speed operation will cause energy waste and aggravate the wear of mechanical parts.

[0004] During cement kiln operation, the resistance of the denitrification device changes with the ash accumulation state. Traditional constant speed transmission cannot adapt to load fluctuations. When the load increases, the motor speed is forced to decrease, resulting in insufficient ash removal kinetic energy. When the load decreases, speed fluctuations will cause vibration of the transmission system, and may even cause the rake arm to hit the inner wall of the equipment, posing a safety hazard. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a variable frequency speed control transmission mechanism for a cement kiln denitrification rake sootblower. This solves the technical problem that in the prior art, under the fixed speed motor drive mode, the sootblower speed cannot be dynamically adjusted according to the working conditions such as the thickness of ash accumulation in the kiln and the flue gas velocity. When the amount of ash accumulation increases, the fixed speed may result in insufficient ash removal force of the rake arm, and the ash residue will affect the denitrification efficiency. On the other hand, when the amount of ash accumulation is small, high-speed operation will cause energy waste and aggravate the wear of mechanical parts.

[0006] According to one aspect, at least one embodiment of this disclosure provides a frequency conversion speed control transmission mechanism for a cement kiln denitrification rake soot blower, comprising:

[0007] A regulating box, wherein a regulating pipe is provided inside the regulating box;

[0008] A switching adjustment component is disposed inside the adjustment box;

[0009] A drive limit assembly is disposed inside the regulating box;

[0010] The switching and adjusting assembly includes a drive cylinder body, which is disposed on the inner side wall of the adjusting box. A motor disc is disposed at the telescopic end of the drive cylinder body, and a drive motor is disposed on the motor disc. An adjusting shaft is disposed at the telescopic end of the drive motor, and a drive gear is disposed on the adjusting shaft. A driven gear is fitted outside the adjusting tube, and the drive gear and the driven gear mesh with each other.

[0011] As a further technical solution, there are two driven gears and two driving gears, and the positions of the driven gears and the driving gears are not corresponding and form an interval.

[0012] As a further technical solution, the drive limiting component includes a positioning sleeve, which is fitted onto the adjusting tube. The positioning sleeve and the adjusting tube are movably connected by a bearing. A positioning frame is provided on the outer side wall of the positioning sleeve, and the end of the positioning frame is fixedly installed on the inner side wall of the adjusting box.

[0013] As a further technical solution, the inner bottom surface of the adjusting box is provided with a limiting groove, a limiting sleeve is fitted on the adjusting shaft, a limiting frame is provided at the bottom of the limiting sleeve, and the bottom of the limiting frame is inserted into the interior of the limiting groove.

[0014] As a further technical solution, the limiting sleeve and the adjusting shaft are connected by a bearing.

[0015] As a further technical solution, the regulating box is provided with an embedding port, and the opposite ends of the regulating tube are inserted into the interior of the embedding port.

[0016] As a further technical solution, the number of positioning sleeves is two, and the two positioning sleeves are located at opposite ends of the adjusting tube.

[0017] As a further technical solution, the driven gear is fixedly mounted on the adjusting tube by a key pin, and the driving gear is fixedly mounted on the adjusting shaft by a key pin.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] In this disclosure, by means of variable frequency speed control technology, the speed of the soot blower can be flexibly and precisely adjusted according to the actual situation of ash accumulation in the cement kiln, such as the thickness and distribution range of the ash accumulation, as well as complex working conditions such as temperature and pressure inside the kiln. When there is a lot of ash accumulation, the speed is increased to enhance the ash removal force; when there is less ash accumulation, the speed is reduced to avoid over-blowing. Compared with the traditional fixed speed transmission mechanism, the ash removal efficiency can be greatly improved, effectively reducing the negative impact of ash accumulation on the denitrification system and ensuring the activity of the denitrification catalyst and the stability of system operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is a cross-sectional view of the regulating box disclosed herein;

[0023] Figure 3 This is an isometric view of the adjusting shaft of this disclosure;

[0024] In the diagram: 1. Adjustment box; 2. Adjustment tube; 3. Switching adjustment component; 3-1. Drive cylinder; 3-2. Motor disc; 3-3. Drive motor; 3-4. Adjustment shaft; 3-5. Drive gear; 3-6. Driven gear; 4. Drive limit component; 4-1. Positioning sleeve; 4-2. Positioning frame; 4-3. Limiting groove; 4-4. Limiting sleeve; 4-5. Limiting frame; 5. Embedding port. Detailed Implementation

[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-3 As shown, it illustrates the frequency conversion speed control transmission mechanism of the cement kiln denitrification rake soot blower of this disclosure, comprising:

[0032] Regulating box 1, with regulating pipe 2 installed inside;

[0033] Switch adjustment component 3, which is located inside adjustment box 1;

[0034] Drive limit component 4 is installed inside the regulating box 1;

[0035] The switching adjustment component 3 includes a drive cylinder 3-1, which is located on the inner wall of the adjustment box 1. A motor disc 3-2 is provided at the telescopic end of the drive cylinder 3-1. A drive motor 3-3 is provided on the motor disc 3-2. An adjustment shaft 3-4 is provided at the telescopic end of the drive motor 3-3. A drive gear 3-5 is provided on the adjustment shaft 3-4. A driven gear 3-6 is fitted on the outside of the adjustment tube 2. The drive gear 3-5 and the driven gear 3-6 mesh with each other.

[0036] The drive limit assembly 4 includes a positioning sleeve 4-1, which is fitted onto the adjusting tube 2. The positioning sleeve 4-1 and the adjusting tube 2 are movably connected by a bearing. A positioning frame 4-2 is provided on the outer wall of the positioning sleeve 4-1, and the end of the positioning frame 4-2 is fixedly installed on the inner wall of the adjusting box 1.

[0037] In some examples, firstly, the installation position of the regulating box 1 in the cement kiln denitrification rake sootblower system is determined, ensuring it is horizontal and stable. Based on the overall layout of the equipment, a suitable support structure is used to fix the regulating box 1, for example, by welding or bolting, to a pre-designed bracket. The drive cylinder 3-1 is then installed on the inner wall of the regulating box 1. During installation, the installation angle and position of the drive cylinder 3-1 must be strictly determined according to the design requirements to ensure that its telescopic end can accurately drive the movement of subsequent components. The drive cylinder 3-1 is firmly fixed to the inner wall of the regulating box 1 using bolts or welding to prevent loosening during operation. A motor disc 3-2 is installed on the telescopic end of the drive cylinder 3-1. The motor disc 3-2 and the telescopic end of the drive cylinder 3-1 should be reliably connected, such as by key or bolt, to ensure synchronous movement between them. Next, a drive motor 3-3 is installed on the motor disc 3-2, ensuring that the installation position of the drive motor 3-3 is accurate and that its axis is aligned with the central axis of the motor disc 3-2.

[0038] An adjusting shaft 3-4 is installed at the telescopic end of the drive motor 3-3. The adjusting shaft 3-4 and the telescopic end of the drive motor 3-3 must be connected in a suitable manner to ensure effective power transmission. A drive gear 3-5 is installed on the adjusting shaft 3-4, and the drive gear 3-5 is fixedly mounted on the adjusting shaft 3-4 by a key pin, ensuring no relative rotation between the gear and the adjusting shaft 3-4. Simultaneously, a driven gear 3-6 is mounted on the outside of the adjusting tube 2, and the driven gear 3-6 is also fixedly mounted on the adjusting tube 2 by a key pin, allowing the driven gear 3-6 to rotate with the adjusting tube 2. The positions of the drive gear 3-5 and the driven gear 3-6 are adjusted to ensure they mesh with each other. To ensure accuracy and stability, the positioning sleeve 4-1 is fitted onto the adjusting tube 2. The positioning sleeve 4-1 and the adjusting tube 2 are connected by a bearing to ensure that the adjusting tube 2 can rotate freely within the positioning sleeve 4-1. At the same time, the positioning sleeve 4-1 can support and position the adjusting tube 2. There are two positioning sleeves 4-1, which are installed at opposite ends of the adjusting tube 2. When installing the positioning sleeve 4-1, it is necessary to ensure its coaxiality with the adjusting tube 2 to avoid eccentricity. The end of the positioning bracket 4-2 on the outer wall of the positioning sleeve 4-1 is fixedly installed on the inner wall of the adjusting box 1. Welding or bolt connection can be used to ensure that the positioning sleeve 4-1 can be firmly fixed inside the adjusting box 1.

[0039] like Figures 1-3 As shown, this embodiment proposes that there are two driven gears 3-6 and two driving gears 3-5, and the positions of the driven gears 3-6 and the driving gears 3-5 are not corresponding and form an interval.

[0040] In some examples, since there are two driven gears 3-6 and two driving gears 3-5, and their positions are not corresponding to form an interval, when the position is adjusted by driving the motor 3-3 through the drive cylinder 3-1, one of the driving gears 3-5 meshes with the driven gear 3-6. Different speeds are achieved by the different transmission ratios of the two driving gears 3-5 and the driven gear 3-6.

[0041] For example, such as Figure 2 As shown, the inner bottom surface of the adjusting box 1 is provided with a limiting groove 4-3, the adjusting shaft 3-4 is fitted with a limiting sleeve 4-4, the bottom of the limiting sleeve 4-4 is provided with a limiting bracket 4-5, and the bottom of the limiting bracket 4-5 is inserted into the interior of the limiting groove 4-3.

[0042] In some examples, a limiting groove 4-3 is opened on the inner bottom surface of the adjusting box 1, and a limiting sleeve 4-4 is fitted on the adjusting shaft 3-4. The limiting sleeve 4-4 and the adjusting shaft 3-4 are movably fitted together by a bearing, so that the limiting sleeve 4-4 can slide freely on the adjusting shaft 3-4, while restricting the radial displacement of the adjusting shaft 3-4. A limiting bracket 4-5 is installed at the bottom of the limiting sleeve 4-4, and the bottom of the limiting bracket 4-5 is inserted into the limiting groove 4-3. After installation, the sliding of the limiting bracket 4-5 in the limiting groove 4-3 is checked to ensure that it can slide smoothly and that there is no jamming or stuck phenomenon during the sliding process.

[0043] For example, such as Figure 2 As shown, the limiting sleeve 4-4 and the adjusting shaft 3-4 are connected by a bearing.

[0044] For example, such as Figure 1 As shown, the regulating box 1 is provided with an insertion port 5, and the two ends of the regulating tube 2 are inserted into the interior of the insertion port 5.

[0045] In some examples, the regulating tube 2 is inserted into the insertion port 5 on the regulating box 1. When the two ends of the regulating tube 2 are inserted into the insertion port 5, the fit between them and the insertion port 5 should be ensured. Lubricant can be applied appropriately to reduce friction and facilitate installation. The regulating tube 2 should be able to rotate freely in the insertion port 5, and its axial position should be kept stable to avoid axial movement during operation.

[0046] For example, such as Figure 2 As shown, there are two positioning sleeves 4-1, which are located at opposite ends of the adjusting tube 2. The driven gear 3-6 is fixedly mounted on the adjusting tube 2 by a key pin, and the driving gear 3-5 is fixedly mounted on the adjusting shaft 3-4 by a key pin.

[0047] When in use, after the drive motor 3-3 starts, it outputs power and drives the connected adjusting shaft 3-4 to rotate. Since the drive gear 3-5 is fixedly mounted on the adjusting shaft 3-4 by a key pin, the rotation of the adjusting shaft 3-4 will directly drive the drive gear 3-5 to rotate synchronously. The drive gear 3-5 meshes with the driven gear 3-6, so the rotation of the drive gear 3-5 is transmitted to the driven gear 3-6 through the meshing action. The driven gear 3-6 is also fixedly mounted on the adjusting tube 2 by a key pin, so the rotation of the driven gear 3-6 will drive the adjusting tube 2 to rotate together, thus realizing the power transmission process from the drive motor 3-3 to the adjusting tube 2, and finally driving the soot blowing action of the cement kiln denitrification rake soot blower.

[0048] When the position of the drive cylinder 3-1 is adjusted by pushing the drive motor 3-3, one of the drive gears 3-5 meshes with the driven gear 3-6. Through the different transmission ratios of the two drive gears 3-5 and the driven gear 3-6, different speeds are achieved, which in turn causes the speeds of the drive gear 3-5, the driven gear 3-6, and the regulating pipe 2 to change. In this way, the working speed of the soot blower can be flexibly adjusted according to the actual needs of the cement kiln denitrification process to achieve the best soot blowing effect.

[0049] Positioning sleeves 4-1 are fitted onto both ends of the adjusting tube 2 and are movably connected to the adjusting tube 2 via bearings. Simultaneously, positioning brackets 4-2 on the outer wall of positioning sleeves 4-1 are fixed to the inner wall of the adjusting box 1. This structural design allows positioning sleeves 4-1 to support the adjusting tube 2, ensuring its stability during rotation. Furthermore, limiting sleeves 4-4 on the adjusting shaft 3-4 are inserted into limiting grooves 4-3 on the bottom inner surface of the adjusting box 1 via limiting brackets 4-5 at the bottom. When the adjusting shaft 3-4 moves with the drive motor 3-3, the limiting brackets 4-5 can only slide within the limiting grooves 4-3, thus restricting the radial displacement of the adjusting shaft 3-4 and ensuring accurate movement trajectory. Through the combined action of positioning sleeves 4-1 and the limiting components, the adjusting tube 2 can rotate stably without axial movement or radial offset, ensuring the normal operation of the entire transmission mechanism.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A variable frequency speed control transmission mechanism for a cement kiln denitrification rake-type soot blower, characterized in that, include: A regulating box (1) is provided with a regulating pipe (2) inside the regulating box (1); A switching adjustment component (3) is disposed inside the adjustment box (1); Drive limit assembly (4), the drive limit assembly (4) is disposed inside the regulating box (1); The switching adjustment assembly (3) includes a drive cylinder (3-1), which is disposed on the inner side wall of the adjustment box (1). A motor disc (3-2) is disposed at the telescopic end of the drive cylinder (3-1), and a drive motor (3-3) is disposed on the motor disc (3-2). An adjustment shaft (3-4) is disposed at the telescopic end of the drive motor (3-3), and a drive gear (3-5) is disposed on the adjustment shaft (3-4). A driven gear (3-6) is fitted on the outside of the adjustment tube (2), and the drive gear (3-5) meshes with the driven gear (3-6).

2. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake soot blower according to claim 1, characterized in that, There are two driven gears (3-6) and two driving gears (3-5). The driven gears (3-6) and the driving gears (3-5) are not in corresponding positions and are spaced apart.

3. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake soot blower according to claim 1, characterized in that, The drive limiting component (4) includes a positioning sleeve (4-1), which is fitted onto the adjusting tube (2). The positioning sleeve (4-1) and the adjusting tube (2) are movably connected by a bearing. A positioning frame (4-2) is provided on the outer side wall of the positioning sleeve (4-1), and the end of the positioning frame (4-2) is fixedly installed on the inner side wall of the adjusting box (1).

4. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake soot blower according to claim 3, characterized in that, The inner bottom surface of the adjustment box (1) is provided with a limiting groove (4-3), and a limiting sleeve (4-4) is fitted on the adjustment shaft (3-4). A limiting frame (4-5) is provided at the bottom of the limiting sleeve (4-4), and the bottom of the limiting frame (4-5) is inserted into the interior of the limiting groove (4-3).

5. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake soot blower according to claim 4, characterized in that, The limiting sleeve (4-4) and the adjusting shaft (3-4) are connected by a bearing.

6. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake-type soot blower according to claim 1, characterized in that, The regulating box (1) is provided with an insertion port (5), and the two ends of the regulating tube (2) are inserted into the interior of the insertion port (5).

7. The variable frequency speed control transmission mechanism for the cement kiln denitrification rake soot blower according to claim 3, characterized in that, The number of positioning sleeves (4-1) is 2, and the two positioning sleeves (4-1) are located at opposite ends of the regulating tube (2).

8. The frequency conversion speed regulation transmission mechanism for the cement kiln denitrification rake soot blower according to claim 1, characterized in that, The driven gear (3-6) is fixedly mounted on the adjusting tube (2) by a key pin, and the driving gear (3-5) is fixedly mounted on the adjusting shaft (3-4) by a key pin.

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