Curve coal drop pipe

Abstract

The utility model relates to a curve coal drop pipe which comprises a curve coal drop pipe body and a plurality of sets of flexible chains, the curve coal drop pipe body comprises a straight pipe portion located at the feeding end and a bent pipe portion located at the discharging end, and the washing face, corresponding to the bent pipe portion, of the straight pipe portion is an installation face. A plurality of groups of flexible lock chains are mounted on the mounting surface close to the feeding end in rows, one end, far away from the feeding end, of each flexible lock chain is a free end, and the flexible lock chains are placed at the discharging end, so that the plurality of groups of flexible lock chains cover the flushing surface; the collision between the coal flow and the flexible chain can effectively control the change of kinetic potential and direction of the coal flow in the slipping process, ensure that the movement scouring speed of the coal flow is greater than the bonding speed of coal slime, enable the coal flow to slip according to the optimal tangential angle and speed, reduce the coal flow impact on the scouring surface of the coal drop pipe, and improve the coal flow quality. The support strength degradation of the scour surface is reduced, the smoothness is reduced, the risks of coal blockage and coal leakage are reduced, and the service life of the curve coal drop pipe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of coal conveying, and in particular to a curved coal drop pipe. Background Technology

[0002] The coal drop pipes at the tail of the belt conveyor in the coal conveying system of thermal power plants have been in operation for a long time, especially the curved coal drop pipes with large height differences. Due to the long-term impact of coal flow, the scouring surface of the coal drop pipe is easily thinned and perforated in many places. Routine patching and replacement of lining plates cannot solve the problem of coal spillage and leakage in the coal drop pipe. Frequent patching operations are inefficient and pose a significant safety risk. After the scouring surface is worn through, the support strength decreases and deteriorates, the smoothness decreases, and abnormal situations such as sticking and clogging occur. Utility Model Content

[0003] The purpose of this invention is to provide a curved coal drop pipe to solve the aforementioned problems in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A curved coal chute includes a curved coal chute body and several sets of flexible chains. The curved coal chute body includes a straight pipe section at the feed end and a curved pipe section at the discharge end. The scouring surface of the straight pipe section corresponding to the curved pipe section is the mounting surface. Several sets of flexible chains are installed in rows on the mounting surface near the feed end. The ends of the sets of flexible chains away from the feed end are free ends and are placed at the discharge end so that the sets of flexible chains cover the scouring surface.

[0006] The beneficial effects of this invention are as follows: By studying and analyzing the elasticity, viscosity, deformation level, sliding, expansion, and fluidity of coal particles in a curved coal chute, and based on this analysis, several sets of flexible chains are designed to be installed in the body of the curved coal chute with a large height difference. The impact of the coal flow with the flexible chains can effectively control the change in the magnitude and direction of the kinetic energy of the coal flow during the sliding process, ensuring that the scouring speed of the coal flow is greater than the coal slime adhesion speed, so that it slides strictly according to the optimal tangential angle and speed, greatly reducing the impact of the coal flow on the scouring surface of the coal chute, reducing the deterioration of the support strength of the scouring surface, reducing the smoothness, reducing the risk of coal blockage and leakage, and increasing the overall service life of the curved coal chute.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, both the straight pipe section and the curved pipe section have polygonal cross-sections, and the mounting surface and the flushing surface form a rectangular curved surface.

[0009] The further beneficial effects of adopting the above are: it facilitates the laying and scouring of several sets of flexible chains; the rectangular curved surface is formed by bending a rectangle.

[0010] Furthermore, it also includes a mounting plate with a square slot on the mounting surface near the feed end. The mounting plate has protrusions that fit the square slots, and several sets of flexible chains are fixed to the protrusions.

[0011] The further beneficial effect of adopting the above is that by fixing several sets of flexible chains to the protrusions respectively, and then detachably fixing the mounting plate to the corresponding position of the curved coal drop pipe body, the structure facilitates installation and disassembly.

[0012] Furthermore, elastic buffer pads are provided at both the upper and lower ends of the protrusion, and the elastic buffer pads are located between the mounting plate and the outer wall of the curved coal drop pipe body.

[0013] The further beneficial effects of adopting the above are: it can effectively alleviate the impact of the flexible chain and further improve the stability of the coal chute structure.

[0014] Furthermore, a reinforcing plate is provided at the lower end of the mounting plate on the outer wall of the curved coal chute body.

[0015] The additional beneficial effects of adopting the above are: on the one hand, the reinforcing plate can improve the structural strength of the feed end of the coal chute body, and better adapt to the impact force brought by the chain; on the other hand, it can limit the position of the mounting plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the flexible chain mounting structure of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Curved coal drop pipe body; 11. Flexible chain; 12. Straight pipe section; 121. Mounting surface; 1211. Square slot; 13. Bend section; 131. Flushing surface; 14. Mounting plate; 141. Protrusion; 15. Elastic buffer pad; 16. Reinforcing plate. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] Example 1

[0022] A curved coal chute includes a curved coal chute body 1 and several sets of flexible chains 11. The curved coal chute body 1 includes a straight pipe section 12 located at the feed end and a bent pipe section 13 located at the discharge end. The flushing surface 131 of the straight pipe section 12 corresponding to the bent pipe section 13 is a mounting surface 121. Several sets of flexible chains 11 are installed in rows near the feed end on the mounting surface 121. The end of each set of flexible chains 11 away from the feed end is a free end and is placed at the discharge end so that the sets of flexible chains 11 cover the flushing surface 131.

[0023] By studying and analyzing the elasticity, viscosity, deformation level, sliding, expansion, and fluidity of coal particles in a curved coal chute, a design was developed to install several sets of flexible chains 11 within the main body 1 of the curved coal chute with a large height difference. The impact of the coal flow with the flexible chains 11 can effectively control the change in the magnitude and direction of the kinetic energy of the coal flow during its descent, ensuring that the scouring velocity of the coal flow is greater than the coal slime adhesion velocity, so that it slides strictly according to the optimal tangential angle and speed. This significantly reduces the impact of the coal flow on the scouring surface of the coal chute, reduces the deterioration of the scouring surface support strength, reduces the smoothness, reduces the risk of coal blockage and leakage, and increases the overall service life of the curved coal chute.

[0024] Example 2

[0025] This embodiment is a further improvement on embodiment 1, as detailed below:

[0026] Both the straight pipe section 12 and the bent pipe section 13 have polygonal cross-sections, and the mounting surface 121 and the flushing surface 131 form a rectangular curved surface.

[0027] It facilitates the laying of several sets of flexible chains 11 and the scouring surface 131; the rectangular curved surface is formed by bending a rectangle.

[0028] Example 3

[0029] This embodiment is a further improvement on embodiment 2, as detailed below:

[0030] It also includes a mounting plate 14, with a square slot 1211 on the mounting surface 121 near the feed end, and a protrusion 141 on the mounting plate 14 that is adapted to the square slot 1211, and several sets of flexible chains 11 are fixed on the protrusion 141.

[0031] By fixing several sets of flexible chains 11 to the protrusions 141 respectively, and then detachably fixing the mounting plate 14 to the corresponding position of the curved coal drop pipe body 1, this structure facilitates installation and disassembly.

[0032] In practice, the flexible chain 11 is fixed to the protrusion 141 by welding. When a part of the flexible chain 11 is damaged and needs to be replaced, the mounting plate 14 is first removed from the square slot 1211, the damaged flexible chain 11 is cut with a grinding wheel, the new flexible chain 11 is welded to the corresponding position, and the mounting plate 14 is installed on the square slot 1211, which effectively avoids cutting the wall of the coal drop pipe due to operational errors.

[0033] Example 4

[0034] This embodiment is a further improvement on embodiment 3, as detailed below:

[0035] Elastic buffer pads 15 are provided at both the upper and lower ends of the protrusion 141. The elastic buffer pads 15 are located between the mounting plate 14 and the outer wall of the curved coal chute body 1. This can effectively mitigate the impact of the flexible chain 11 and further improve the stability of the coal chute body 1 structure.

[0036] The elastic buffer pad 15 is made of spring steel. Spring steel has high elasticity, high strength, wear resistance, and corrosion resistance, which can better buffer the impact force between the mounting plate and the coal chute wall.

[0037] Example 5

[0038] This embodiment is a further improvement on embodiment 4, as detailed below:

[0039] The lower end of the mounting plate 14 is provided with a reinforcing plate 16 on the outer wall of the curved coal chute body 1.

[0040] The reinforcing plate 16 can improve the structural strength of the feed end of the curved coal drop pipe body 1, and better adapt to the impact force brought by the flexible chain 11. On the other hand, it can limit the mounting plate 14 and improve the stability of the mounting plate 14.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A curved coal drop chute, characterized in that, The curve coal chute body (1) includes a straight pipe section (12) at the feeding end and a bent pipe section (13) at the discharging end, the flush surface (131) of the bent pipe section (13) corresponds to the mounting surface (121) of the straight pipe section (12), the mounting surface (121) is close to the feeding end and is installed with a plurality of groups of flexible chains (11) in rows, the end of the plurality of groups of flexible chains (11) away from the feeding end is a free end, and is placed at the discharging end, so that the plurality of groups of flexible chains (11) cover the flush surface (131).

2. A curve coal drop chute according to claim 1 wherein, The cross sections of the straight pipe section (12) and the bent pipe section (13) are both polygonal structures, and the mounting surface (121) and the flush surface (131) form a rectangular curved surface.

3. A curve coal drop chute according to claim 2, characterised in that, The mounting plate (14) is further included, the mounting surface (121) is close to the feeding end and is provided with a square notch (1211), the mounting plate (14) is provided with a protrusion (141) matched with the square notch (1211), and the plurality of groups of flexible chains (11) are fixed on the protrusion (141).

4. A curve coal drop chute according to claim 3, characterised in that, The protrusion (141) is provided with an elastic buffer gasket (15) at the upper end and the lower end, and the elastic buffer gasket (15) is located between the mounting plate (14) and the outer wall of the curve coal chute body (1).

5. A curve coal drop chute according to claim 4 wherein, The elastic buffer gasket (15) is spring steel.

6. A curve coal drop chute according to claim 5 wherein, The lower end of the mounting plate (14) is provided with a reinforcing plate (16) on the outer wall of the curve coal chute body (1). The elastic buffer gasket (15) is spring steel. The lower end of the mounting plate (14) is provided with a reinforcing plate (16) on the outer wall of the curve coal chute body (1).

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