Wear-resistant double-shaft stirrer blade

Abstract

The wear-resistant double-shaft stirrer blade comprises a supporting seat and a machine body fixedly connected to the top end of the supporting seat, rotating shafts are horizontally, transversely and symmetrically arranged on the inner wall of the machine body, a plurality of stirring blades are arranged on the outer walls of the rotating shafts, and wear-resistant structures used for protecting the stirring blades are arranged on the outer walls of the stirring blades. The stirring blade is provided with a wear-resistant structure, the wear-resistant structure comprises a wear-resistant sheet, the bottom end of the wear-resistant sheet is fixedly connected with the outer wall of the stirring blade, and one side, close to the rotating shaft, of the stirring blade is provided with a connecting and fixing structure used for quickly disassembling and assembling the stirring blade. The problem that in the ash discharging process, due to abrasion of wet ash, the service life is shortened is avoided, meanwhile, a corresponding connecting and fixing structure is arranged on the fixing sleeve, the stirring blades can be rapidly mounted and dismounted, and the situation that normal production of a power plant is affected due to long-time dismounting and mounting of the stirring blades is avoided.

Description

Technical Field

[0001] The utility model relates to the field of boiler flue gas ash removal in thermal power plants, in particular to a wear-resistant double-shaft agitator blade. Background Art

[0002] In the daily production of the boiler ash storage of thermal power plants, double-shaft agitators are usually used for ash discharge operations. In actual use, a single double-shaft agitator runs for about 15 hours a day, with a rated output of 200t / h and a daily ash discharge of about 3,000t. The operation time is long and the ash discharge volume is large. At the same time, during the ash discharge of the double-shaft agitator, in order to suppress the dust of dry ash, the agitator is equipped with a dry ash humidification system to humidify and stir the dry ash entering the agitator to form wet ash with a moisture content of 30%. The mass of each cubic meter of wet ash is about 1 / 3 greater than that of dry ash, which increases the output of the agitator. The blade resistance increases, the wear intensifies, and there is no corresponding protective wear-resistant structure. When the top part of the blade is worn to 1 / 3 of the blade length, the output of the twin-shaft agitator is reduced by 80%, which will cause the agitator to be blocked, accumulated or even leaked. The effective service life of the blade is short, which is not conducive to the normal ash discharge operation of the twin-shaft agitator. In actual use, the mixing blade is fixed to the fixed sleeve by bolts and nuts. When it is necessary to install and disassemble the mixing blade, it is necessary to use tools to repeatedly turn the nut. Due to the large number of mixing blades, the replacement time is long, affecting normal production. Utility Model Content

[0003] The purpose of the utility model is to provide a wear-resistant double-shaft agitator blade to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wear-resistant double-shaft agitator blade, comprising a support seat and a body fixedly connected to the top of the support seat, the inner wall of the body is horizontally and laterally symmetrically provided with a rotating shaft, the outer wall of the rotating shaft is provided with a plurality of stirring blades, the outer wall of the stirring blade is provided with a wear-resistant structure for protecting the stirring blade, the wear-resistant structure comprises a wear-resistant blade, the bottom end of the wear-resistant blade is fixedly connected to the outer wall of the stirring blade, and the side of the stirring blade close to the rotating shaft is provided with a connecting and fixing structure for quickly disassembling the stirring blade;

[0005] The connection and fixing structure comprises a fixing rod, and a plug-in groove is provided on one side of the stirring blade close to the rotating shaft, and the inner wall of the plug-in groove and the outer wall of the fixing rod are slidably inserted and connected.

[0006] Preferably, a plurality of fixed sleeves are evenly spaced and fixedly connected around the outer wall of the rotating shaft, the inner wall of the fixed sleeve and the outer wall of the stirring plate are slidably and interlacedly connected, a cavity is opened at the top of the fixed sleeve and on one side close to the stirring plate, and the outer wall of the fixed rod and the bottom end of the cavity are slidably and interlacedly connected.

[0007] Preferably, a pressure plate is fixedly connected to the top of the fixing rod, a spring is arranged on the top of the pressure plate, the spring and the pressure plate are both arranged on the inner wall of the cavity, and an unlocking piece for releasing the fixation is arranged on the top of the pressure plate.

[0008] Preferably, the unlocking member includes a pull ring, a pull rod is hinged at the bottom end of the pull ring, the bottom end of the pull rod is fixedly connected to the top end of the pressure plate, a groove is provided at the top end of the fixed sleeve and at the top end of the cavity, and the inner wall of the groove and the outer wall of the pull ring are slidably and interlacedly connected.

[0009] Preferably, an elastic block is fixedly connected to the top of the pull ring, a slot is provided on the inner wall of the groove and on a side away from the pull rod, and the outer wall of the elastic block and the inner wall of the slot are slidably interlaced and connected.

[0010] Preferably, the inner wall of the fixing sleeve is horizontally and longitudinally symmetrically fixedly connected with a limiting rod, and a limiting groove is horizontally and longitudinally symmetrically provided on one side of the stirring piece close to the fixing sleeve, and the inner wall of the limiting groove and the outer wall of the limiting rod are slidably interlaced and connected.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model provides a corresponding wear-resistant structure on the stirring blade, and utilizes the wear-resistant layer provided therein to protect the stirring blade, thereby avoiding reduction of service life due to wear of wet ash during ash placement. At the same time, a corresponding connecting and fixing structure is provided on the fixing sleeve, so that the stirring blade can be quickly installed and disassembled, avoiding long-term disassembly and assembly of the stirring blade to affect the normal production of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a top sectional view of the overall structure of the utility model.

[0015] Figure 3 For this utility model Figure 2 A magnified view of the structure in the middle.

[0016] Figure 4 For this utility model Figure 2 Cross-sectional view of the structure at point A.

[0017] Figure 5 For this utility model Figure 4 A magnified view of the structure at B in the middle.

[0018] Figure 6 This is a top sectional view of the structure of the connection between the stirring blade and the fixing sleeve of the utility model.

[0019] In the figure: 1. support seat; 2. machine body; 3. rotating shaft; 4. stirring blade; 401. plug-in slot; 402. limiting slot; 5. fixing sleeve; 501. cavity; 502. groove; 503. slot; 6. wear-resistant sheet; 7. fixing rod; 8. pressure plate; 9. pull rod; 10. spring; 11. pull ring; 1101. elastic block; 12. limiting rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides Figure 1-6 A wear-resistant dual-axis agitator blade is shown, comprising a support base 1 and a body 2 fixedly connected to the top of the support base 1, a rotating shaft 3 is horizontally and laterally symmetrically arranged on the inner wall of the body 2, a plurality of stirring blades 4 are arranged on the outer wall of the rotating shaft 3, a wear-resistant structure for protecting the stirring blades 4 is arranged on the outer wall of the stirring blades 4, the wear-resistant structure comprises a wear-resistant blade 6, the bottom end of the wear-resistant blade 6 is fixedly connected to the outer wall of the stirring blade 4, and a connecting and fixing structure for quickly disassembling and assembling the stirring blade 4 is arranged on the side of the stirring blade 4 close to the rotating shaft 3.

[0022] It should be noted that, when the twin-shaft agitator is actually in operation, the main contact surface between the stirring blade 4 and the material is one-third of the distance from the blade top to the blade root. Therefore, before replacing the blade, the lower one-third of the blade top is welded with D998 wear-resistant welding rods to form wear-resistant sheets 6. The thickness of the wear-resistant sheet 6 is more than 5 mm, covering the entire contact surface between the stirring blade 4 and the material. The D998 wear-resistant welding rod is a tungsten carbide wear-resistant welding rod, which is mainly made of W-Cr-B and a variety of wear-resistant alloys. It has high hardness and good resistance to external impact. After replacing the blade, the effective service life of the blade is extended. Long, and further, the welding of D998 wear-resistant welding rod refers to the use of D998 wear-resistant welding rod to perform surfacing welding on the arc surface of the blade top of the dual-axis agitator stirring blade 4, the weld width can cover the thickness of the blade top part, the weld length can cover the lower third of the blade top, and the weld height is about 5mm. The stirring blade 4 is protected by the wear-resistant plate 6 on the stirring blade 4 to avoid reducing the service life due to wear of wet ash during the ash discharge process. At the same time, a corresponding connecting and fixing structure is set, so that the stirring blade 4 can be quickly installed and disassembled, avoiding long-term disassembly of the stirring blade 4 to affect the normal production of the power plant.

[0023] The connection and fixing structure comprises a fixing rod 7 . A plug-in groove 401 is formed on one side of the stirring blade 4 close to the rotating shaft 3 . The inner wall of the plug-in groove 401 and the outer wall of the fixing rod 7 are slidably inserted and connected.

[0024] Furthermore, the stirring blade 4 is fan-shaped as a whole, and the position of the stirring blade 4 is fixed by inserting the fixing rod 7 into the insertion groove 401 provided on the stirring blade 4.

[0025] A plurality of fixed sleeves 5 are evenly spaced and fixedly connected around the outer wall of the rotating shaft 3. The inner wall of the fixed sleeve 5 and the outer wall of the stirring blade 4 are slidably and interlacedly connected. A cavity 501 is provided at the top of the fixed sleeve 5 and on one side close to the stirring blade 4. The outer wall of the fixed rod 7 and the bottom end of the cavity 501 are slidably and interlacedly connected.

[0026] Furthermore, the cross-section of the fixing sleeve 5 is in a concave shape, and a connecting groove is provided on the side away from the rotating shaft 3 , and the stirring blade 4 is inserted into the connecting groove of the fixing sleeve 5 .

[0027] A pressing plate 8 is fixedly connected to the top of the fixing rod 7 , a spring 10 is arranged on the top of the pressing plate 8 , the spring 10 and the pressing plate 8 are both arranged inside the cavity 501 , and an unlocking member for releasing the fixation is arranged on the top of the pressing plate 8 .

[0028] Furthermore, the spring 10 is configured as a pressure spring 10, which presses the pressure plate 8 downward to stably push the fixing rod 7 into the insertion slot 401. At the same time, the spring 10 and the pressure plate 8 are both arranged inside the cavity 501 to avoid position displacement that affects normal fixation.

[0029] The unlocking member includes a pull ring 11, the bottom end of which is hinged with a pull rod 9, the bottom end of the pull rod 9 is fixedly connected to the top of the pressure plate 8, a groove 502 is provided at the top of the fixed sleeve 5 and at the top of the cavity 501, and the inner wall of the groove 502 is slidably and interlacedly connected with the outer wall of the pull ring 11.

[0030] Furthermore, by pulling the pull ring 11, the pull rod 9, the pressure plate 8 and the fixing rod 7 are moved in the vertical plane position, so that the fixing rod 7 is released. At the same time, a groove 502 is opened at the top of the fixing sleeve 5, and the pull ring 11 can be stored in the groove 502 when it is not in use.

[0031] An elastic block 1101 is fixedly connected to the top of the pull ring 11 , a slot 503 is provided on the inner wall of the groove 502 and on the side away from the pull rod 9 , and the outer wall of the elastic block 1101 and the inner wall of the slot 503 are slidably interlaced and connected.

[0032] Furthermore, the elastic block 1101 made of elastic rubber material slides in the slot 503 to fix the pull ring 11, thereby preventing it from shaking when the agitator is working and affecting actual use.

[0033] The inner wall of the fixing sleeve 5 is symmetrically fixedly connected to the limiting rod 12 in the horizontal and longitudinal direction. The stirring blade 4 has a limiting groove 402 symmetrically formed in the horizontal and longitudinal direction on one side close to the fixing sleeve 5. The inner wall of the limiting groove 402 and the outer wall of the limiting rod 12 are slidably interlaced.

[0034] Furthermore, the limiting rods 12 symmetrically arranged in the horizontal and longitudinal directions slide in the limiting grooves 402 to fix the horizontal and longitudinal positions of the stirring blades 4 to prevent the stirring blades 4 from shaking and affecting normal stirring.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant double-shaft agitator blade, comprising a support base (1) and a body (2) fixedly connected to the top of the support base (1), characterized in that: The inner wall of the machine body (2) is symmetrically provided with a rotating shaft (3), the outer wall of the rotating shaft (3) is provided with a plurality of stirring blades (4), the outer wall of the stirring blade (4) is provided with a wear-resistant structure for protecting the stirring blade (4), the wear-resistant structure comprises a wear-resistant blade (6), the bottom end of the wear-resistant blade (6) is fixedly connected to the outer wall of the stirring blade (4), and a connecting and fixing structure for quickly disassembling the stirring blade (4) is provided on one side of the stirring blade (4) close to the rotating shaft (3); The connecting and fixing structure comprises a fixing rod (7), and a plug-in groove (401) is provided on a side of the stirring blade (4) close to the rotating shaft (3), and the inner wall of the plug-in groove (401) and the outer wall of the fixing rod (7) are connected in a sliding manner.

2. A wear-resistant dual-shaft agitator blade according to claim 1, characterized in that: A plurality of fixing sleeves (5) are evenly spaced and fixedly connected around the outer wall of the rotating shaft (3); the inner wall of the fixing sleeve (5) and the outer wall of the stirring blade (4) are slidably interpenetratingly connected; a cavity (501) is provided at the top of the fixing sleeve (5) and on one side close to the stirring blade (4); and the outer wall of the fixing rod (7) and the bottom end of the cavity (501) are slidably interpenetratingly connected.

3. A wear-resistant dual-shaft agitator blade according to claim 2, characterized in that: A pressure plate (8) is fixedly connected to the top of the fixing rod (7), a spring (10) is arranged at the top of the pressure plate (8), the spring (10) and the pressure plate (8) are both arranged inside the cavity (501), and an unlocking member for releasing the fixation is arranged at the top of the pressure plate (8).

4. A wear-resistant dual-shaft agitator blade according to claim 3, characterized in that: The unlocking member comprises a pull ring (11), the bottom end of the pull ring (11) is hinged with a pull rod (9), the bottom end of the pull rod (9) is fixedly connected to the top end of the pressure plate (8), the top end of the fixing sleeve (5) and the top end of the cavity (501) are provided with a groove (502), the inner wall of the groove (502) and the outer wall of the pull ring (11) are slidably interlaced and connected.

5. A wear-resistant dual-shaft agitator blade according to claim 4, characterized in that: An elastic clamping block (1101) is fixedly connected to the top of the pull ring (11), a clamping slot (503) is provided on the inner wall of the groove (502) and on a side away from the pull rod (9), and the outer wall of the elastic clamping block (1101) and the inner wall of the clamping slot (503) are slidably interlaced and connected.

6. A wear-resistant dual-shaft agitator blade according to claim 2, characterized in that: The inner wall of the fixing sleeve (5) is horizontally and longitudinally symmetrically fixedly connected to the limiting rod (12); a limiting groove (402) is horizontally and longitudinally symmetrically provided on one side of the stirring blade (4) close to the fixing sleeve (5); the inner wall of the limiting groove (402) and the outer wall of the limiting rod (12) are slidably interlaced and connected.

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