Inclined anti-abrasion plate with bottom support

Abstract

The utility model relates to the technical field of anti-abrasion plates, and discloses an inclined anti-abrasion plate with a bottom support. The technical problems that in the prior art, due to uneven abrasion of a plane anti-abrasion plate, local damage is caused, the heat efficiency of equipment is affected, and the angle is difficult to adjust after installation are solved. The device comprises a plurality of unit anti-abrasion plates which are obliquely connected to fins in a hinged mode, grooves are formed in the bottoms of the unit anti-abrasion plates, supporting assemblies are installed in the grooves and comprise bottom elastic plates, the upper portions of the bottom elastic plates abut against the grooves in the bottoms of the unit anti-abrasion plates, and the lower portions of the bottom elastic plates are connected to the fins in a hinged mode. One side of each unit anti-abrasion plate is concaved inwards to form a semicircular notch attached to the corresponding fin. Abrasion resistance, heat efficiency and maintenance convenience are improved, meanwhile, the problems of dust accumulation and uneven abrasion are reduced, and the water-cooled wall protection device is suitable for water-cooled wall protection of high-temperature flue gas treatment equipment such as boilers and incinerators.

Description

Technical Field

[0001] The utility model relates to the technical field of wear-resistant plates, in particular to an inclined wear-resistant plate with a bottom support. Background Art

[0002] Circulating fluidized bed boiler power generation started in 1996 and entered the supercritical era in 2013. Circulating fluidized bed boilers have replaced pulverized coal boilers and become a trend in the thermal power generation industry due to their advantages in comprehensive resource utilization. However, it is difficult to increase the boiler capacity due to the limitations of slag cooling auxiliary equipment. Circulating fluidized bed boilers are a type of equipment that separates the combustible solid particles mixed in the flue gas at the furnace outlet through separators, return devices, etc., and then returns them to the furnace for multiple combustion. It has the characteristics of cleanliness, high efficiency, and a wide range of fuels, and has a good development prospect. Due to the high concentration of solid particles and high gas-solid flow rate in circulating fluidized bed boilers, the water-cooled wall wear in the circulating fluidized bed boiler furnace is very serious, so water-cooled wall wear protection has also become the core of stable operation of the boiler.

[0003] Chinese patent document in the prior art: 202011174901.4 discloses an anti-wear device for preventing wear of a circulating fluidized bed water-cooled wall and an installation method thereof, wherein the anti-wear device comprises: a plurality of anti-wear blocks respectively connected to the circulating fluidized bed water-cooled wall tubes, each anti-wear block is respectively made of a stainless steel plate, and each anti-wear block is respectively provided with a semicircular open-ring groove opposite to the circulating fluidized bed water-cooled wall tube; wherein a preset thermal expansion gap is constructed between the outer wall of the semicircular open-ring groove facing the water-cooled wall tube and the circulating fluidized bed water-cooled wall tube, and the protrusions on both sides of the semicircular open-ring groove are welded together with the fins.

[0004] However, during the implementation of the above scheme, there are at least the following technical problems: the flat anti-wear plate is locally damaged due to uneven wear, and particles are easily accumulated on the surface of the anti-wear plate, affecting the normal circulation of airflow. Furthermore, the airflow is unevenly distributed when passing through the anti-wear plate, resulting in local overheating and increased wear, affecting the thermal efficiency of the equipment, and it is difficult to adjust the angle after installation. Therefore, it is urgent to propose an inclined anti-wear plate with a bottom support. Summary of the invention

[0005] In view of the above technical problems, the present disclosure provides an inclined anti-wear plate with a bottom support, which solves the technical problems in the prior art that the flat anti-wear plate is locally damaged due to uneven wear, and particulate matter is easily accumulated on the surface of the anti-wear plate, affecting the normal circulation of the airflow. Furthermore, the airflow is unevenly distributed when passing through the anti-wear plate, resulting in local overheating and increased wear, affecting the thermal efficiency of the equipment, and it is difficult to adjust the angle after installation.

[0006] According to one aspect of the present disclosure, there is provided an inclined anti-wear plate with bottom support, which is installed on the fins of the water-cooled wall. The fins include a number of semi-cylindrical columns arranged at intervals. The inclined anti-wear plate includes a number of unit anti-wear plates that are inclined and hinged to the fins. A groove is provided at the bottom of the unit anti-wear plate, and a support assembly is installed in the groove to maintain the mechanical stability of the unit anti-wear plate. The support assembly is connected to the groove via a sliding pair. The bottom elastic plate abuts against the bottom groove of the unit anti-wear plate above and is hinged to the fins below. A semi-circular notch that fits the fins is formed by concave inward on one side of the unit anti-wear plate, and an arc that is in the same direction as the outer arc of the cross-section of the fins is formed on the other side of the unit anti-wear plate.

[0007] In some embodiments of the present disclosure, the bottom elastic plate is arc-shaped and made of arc-shaped spring steel material, and the thickness of the arc-shaped spring steel is less than 5 mm.

[0008] In some embodiments of the present disclosure, the inclination angle of the unit anti-wear plate is 30° - 60°.

[0009] In some embodiments of the present disclosure, at least one flow guiding groove hole with an arc-shaped central axis is provided on the unit anti-wear plate, and the flow guiding groove holes are arranged around the large semi-cylindrical column.

[0010] In some embodiments of the present disclosure, 3 flow guiding groove holes with an arc-shaped central axis are arranged at intervals in the horizontal direction on the unit anti-wear plate, and the distance from the flow guiding groove holes to the fins is equal to the distance from the flow guiding groove holes to the outer edge of the arc-shaped plate.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. Through optimized air flow distribution and wear protection, it helps to improve the heat exchange efficiency of the water-cooled wall, reduces the maintenance requirements caused by wear, and extends the service life of the equipment. By reducing wear and ash accumulation, as well as improving the heat exchange efficiency, it helps to reduce the maintenance cost and energy consumption, and improves the economy and sustainability of the equipment.

[0013] 2. The flow guiding groove holes provided on the unit anti-wear plate are arranged around the large semi-cylindrical column, which helps to improve the air flow distribution, reduce turbulence and local wear, and at the same time promote the natural shedding of ash accumulation, thus extending the service life of the anti-wear plate.

[0014] 3. The design of the inclined anti-wear plate helps to disperse and reduce wear. Especially when the flue gas or particulate matter impacts at a certain angle, the inclination angle can effectively change the particle trajectory and reduce direct impact, thereby extending the service life of the anti-wear plate. The inclination angle of the unit anti-wear plate is designed between 30° and 60°, which helps to improve the guiding effect of the air flow and further improves the efficiency of the anti-wear plate.

[0015] 4. The bottom elastic plate in the support assembly has a certain elastic force, enabling the unit wear-resistant plate to remain stable when subjected to air flow impact, while allowing a certain degree of rotation, improving the self-adjustment ability and stability of the wear-resistant plate. It can have a certain degree of sliding with the wear-resistant plate and can automatically adjust the position of the unit wear-resistant plate to adapt to air flow changes under different working conditions without the need for additional adjustment mechanisms.

[0016] 5. The semi-circular notch on one side and the arc design on the other side of the unit wear-resistant plate not only improve the fit with the fins but also optimize the hydrodynamic performance, reduce resistance, and improve the heat exchange efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an inclined wear-resistant plate with a bottom support;

[0018] Figure 2 It is a schematic structural diagram of the inclined wear-resistant plate with a bottom support from another perspective;

[0019] Names of each component in the figure: 1. Unit wear-resistant plate; 2. Fins; 3. Bottom elastic plate; 4. Groove; 5. Semi-circular notch; 6. Arc; 7. Hinged connection; 8. Flow guiding groove hole; 9. Semi-circular column. Detailed Implementation Modes

[0020] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not used to limit the present invention. Embodiment 1

[0021] This example discloses an inclined wear-resistant plate with a bottom support. Refer to Figures 1 to 2 , which is installed on the fins 2 of the water-cooled wall. The fins 2 include a number of semi-circular columns 9 arranged at intervals. The inclined wear-resistant plate includes a number of unit wear-resistant plates 1 that are inclined and hingedly connected to the fins. A groove 4 is provided at the bottom of the unit wear-resistant plate 1, and a support assembly is installed in the groove 4 to maintain the mechanical stability of the unit wear-resistant plate 1. The support assembly is connected to the groove 4 via a sliding pair. The support assembly includes a bottom elastic plate 3. The bottom elastic plate 3 abuts against the bottom groove 4 of the unit wear-resistant plate 1 above and is hingedly connected 7 to the fins 2 below. A semi-circular notch 5 that fits the fins 2 is formed by concave inward on one side of the unit wear-resistant plate 1, and an arc 6 that is in the same direction as the outer arc of the cross-section of the fins 2 is formed on the other side of the unit wear-resistant plate 1.

[0022] The bottom elastic plate is arc-shaped and is made of arc-shaped spring steel material. The thickness of the arc-shaped spring steel is less than 5 mm.

[0023] The inclination angle of the unit wear-resistant plate 1 is 30 to 60 degrees.

[0024] Three diversion groove holes 8 with arc-shaped central axes are arranged at horizontal intervals on the unit wear-resistant plate 1, and the diversion groove holes 8 are arranged around the periphery of the large semi-cylindrical column. The distance from the diversion groove holes 8 to the fins is equal to the distance from the diversion groove holes 8 to the outer edge of the arc-shaped plate.

[0025] During the working process, the bottom elastic plate 3 is installed in the bottom groove 4 of the unit wear-resistant plate 1. The unit wear-resistant plate 1 is fixed on the fin 2 through the hinge connection 7 to ensure that the unit wear-resistant plate 1 is in close contact with the fin 2. When the air flow passes through the unit wear-resistant plate, due to the dynamic pressure effect of the air flow, a downward force will be generated on the unit wear-resistant plate, and this force attempts to deflect the unit wear-resistant plate downward or change its inclination angle. The direction of the bottom elastic plate is opposite to the impact force of the air flow and acts upward on the unit wear-resistant plate, thereby resisting the downward force brought by the air flow and supporting the unit wear-resistant plate to maintain a predetermined inclination angle. Under the interaction of the air flow impact force and the bottom elastic plate, the unit wear-resistant plate will reach a dynamic equilibrium state, that is, the forces in these two directions cancel each other out at a certain inclination angle, so that the unit wear-resistant plate is stabilized at this angle. The hinge connection design between the unit wear-resistant plate and the fin allows the unit wear-resistant plate to rotate freely within a certain range, increasing flexibility and enabling the unit wear-resistant plate to adapt to air flow changes of different intensities and directions. At the same time, the stability of the structure is ensured, and even under the air flow impact, the unit wear-resistant plate can maintain its predetermined inclination angle without excessive deflection or damage. It effectively improves the air flow distribution, reduces wear, and improves the heat exchange efficiency. At the same time, it realizes automatic adjustment through the repulsive effect of the magnetic snap, reduces the maintenance cost, and improves the reliability. When the high-temperature flue gas carrying fly ash particles passes through the water-cooled wall, the design of the inclined wear-resistant plate changes the flow direction of the flue gas. Since the wear-resistant plate is inclined at 30° to 60°, the flue gas and fly ash do not directly vertically impact the surface of the wear-resistant plate, but slide along the inclined surface, reducing the wear caused by direct impact. The setting of the bottom elastic plate 3 enables the wear-resistant plate to undergo slight elastic deformation when impacted by fly ash, which helps to disperse the impact force and reduce the concentrated damage to the wear-resistant plate, thereby extending the service life of the wear-resistant plate. The existence of the diversion groove holes 8 not only helps to guide the flue gas flow but also promotes the uniform distribution of the flue gas on the surface of the water-cooled wall, which improves the heat exchange efficiency because the flue gas can contact the water-cooled wall more fully, thereby improving the thermal utilization rate of the boiler. The bottom elastic plate is designed as an arc-shaped spring steel, which can adapt to the working environment of the water-cooled wall, has a certain elastic force, and can have a certain sliding with the wear-resistant plate under the hot air impact. Therefore, in actual operation, this inclined wear-resistant plate can effectively reduce the wear of fly ash on the water-cooled wall, improve the heat exchange efficiency, simplify the maintenance process, and ensure the long-term stable operation and economy of the boiler.

[0026] Although some preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present utility model.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of this application and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. An inclined wear-resistant plate with a bottom support is installed on the fin of a water-cooled wall. The fin comprises a plurality of semi-cylindrical columns arranged at intervals, and is characterized in that: The inclined wear-resistant plate comprises a plurality of unit wear-resistant plates which are inclinedly hinged to the fins. A groove is arranged at the bottom of the unit wear-resistant plate, and a support assembly is installed in the groove to maintain the mechanical stability of the unit wear-resistant plate. The support assembly is connected to the groove through a sliding pair. The support assembly comprises a bottom elastic plate, the upper part of the bottom elastic plate abuts against the bottom groove of the unit wear-resistant plate, and the lower part is hinged to the fin. A semi-circular notch which fits the fin is formed by concave in one side of the unit wear-resistant plate, and an arc which is in the same direction as the outer arc of the cross-section of the fin is formed in the other side of the unit wear-resistant plate.

2. The inclined anti-wear plate with bottom support according to claim 1, characterized in that: The bottom elastic plate is arc-shaped and made of arc-shaped spring steel material, and the thickness of the arc-shaped spring steel is less than 5mm.

3. The inclined anti-wear plate with bottom support described in claim 1, characterized in that: The inclination angle of the unit wear-resistant plate is 30-60 degrees.

4. The inclined anti-wear plate with bottom support according to claim 1, characterized in that: At least one diversion groove hole with an arc-shaped central axis is arranged on the unit wear-resistant plate, and the diversion groove holes are arranged around the periphery of a large semi-cylindrical column.

5. The inclined wear-resistant plate with bottom support according to claim 1, characterized in that: Three diversion groove holes with arc-shaped central axes are arranged at intervals in the horizontal direction on the unit wear-resistant plate, and the distance from the diversion groove holes to the fin is equal to the distance from the diversion groove holes to the outer edge of the arc-shaped plate.

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