CN220501582U - Anti-blocking coal dropping pipe - Google Patents

Abstract

The utility model discloses an anti-blocking coal dropping pipe, and mainly relates to the field of anti-blocking coal dropping pipes for thermal power generation. The coal bucket and the frustum buffer communicating pieces are sequentially arranged in a reduced mode according to the diameter of an opening at the bottom, the whole coal bucket and the frustum buffer communicating pieces are connected end to end in an inverted cone shape to form a closed coal dropping pipeline, and buffer positions are formed at the end to end positions of two adjacent frustum connecting pieces; the closed coal dropping pipeline is fixedly connected to the bottom of the coal hopper to buffer the pressure of coal at the bottom of the coal hopper so as to prevent blockage. The utility model has the beneficial effects that: the original whole large coal dropping pipe with the inverted cone structure is modified into the coal dropping pipe with the multi-section expanded inverted cone structure, and in the traditional inverted cone structure, the bottom coal has high pressure bearing and is easy to form blockage on the inclined plane. In the multi-section diameter-expanded inverted cone structure, the pressure bearing of bottom coal is reduced, and the blockage probability is greatly reduced.

Description

Anti-blocking coal dropping pipe

Technical Field

The utility model relates to the field of anti-blocking coal dropping pipes for thermal power generation, in particular to an anti-blocking coal dropping pipe from a raw coal bin to a coal feeder.

Background

Coal blockage of a coal conveying system from a raw coal bin of a thermal power plant to a coal dropping pipe of a coal feeder is a common problem of maintenance personnel.

As shown in fig. 3 and 4 of the accompanying drawings of the specification, the whole of the traditional raw coal bin to the coal feeder is of an inverted cone structure, and as shown in fig. 3 and 4 of the accompanying drawings of the specification, a large amount of coal is easy to form blockage in the downward conveying process, particularly, as the shrinkage rate of the section of the inverted cone coal bin is smaller, the flow resistance of coal is increased, so that the pressure of coal at the bottom layer of the inverted cone coal feeder is large, in addition, the diameter difference of coal inlets and coal outlets is too large under the condition, and the coal outlets are relatively smaller, so that blockage is easy to form; the traditional solution is to set up the vibrator (as the description is shown in figure 5 of the accompanying drawings) on the coal bunker outer wall, lead to stifled through beating the outer wall, but this kind of mode is when above-mentioned coal humidity is too big, beats the outer wall through the vibrator, only can beat the coal more tightly more, is unfavorable for subsequent logical stifled operation on the contrary.

Disclosure of Invention

The utility model aims to provide an anti-blocking coal dropping pipe from a raw coal bin to a coal feeder, which is characterized in that the original whole large coal dropping pipe with an inverted cone structure is firstly modified into a coal dropping pipe with a multi-section expanding inverted cone structure, and in the traditional inverted cone structure, the pressure bearing of bottom coal is large, so that the blockage is easy to form. In the multi-section diameter-expanded inverted cone structure, the pressure bearing of bottom coal is reduced, and the blockage probability is greatly reduced; meanwhile, in the multi-section diameter-expanded inverted cone structure, a plurality of spiral cleaning devices are respectively arranged, so that coal stuck on the side wall can be accurately cleaned and conveyed downwards in time.

The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:

an anti-blocking coal dropping pipe,

the coal bucket and the frustum buffer communicating pieces are sequentially arranged according to the diameter of the opening at the bottom, the whole frustum buffer communicating pieces are in an inverted cone shape and fixedly connected end to form a closed coal dropping pipeline, and buffer positions are formed at the end to end positions of two adjacent frustum connecting pieces;

the closed coal dropping pipeline is fixedly connected to the bottom of the coal bucket to buffer the pressure of coal at the bottom of the coal bucket.

The buffer position is a buffer table, a cleaning device is arranged on the buffer table, and the cleaning device is fixed on the buffer table and is attached to the side wall of the corresponding frustum buffer communicating piece in parallel.

The cleaning device is a spiral cleaning device.

The spiral cleaning device is a double-spiral line cleaning rod.

Compared with the prior art, the utility model has the beneficial effects that:

firstly, the whole original coal dropping pipe with a large inverted cone structure is modified into a coal dropping pipe with a multi-section diameter-expanding inverted cone structure, in the traditional inverted cone structure, the pressure bearing of bottom coal is large, and if the humidity of the coal is large, blockage can be formed. In the multi-section expanding reverse taper structure, the pressure bearing of bottom coal is reduced, and the blocking probability is greatly reduced; finally, compared with the traditional knocking blocking mode, the multi-section expanding reverse taper structure is provided with the plurality of spiral cleaning devices respectively, so that coal stuck on the side wall can be accurately cleaned and conveyed downwards in time.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a cross-sectional view of the overall structure of the present utility model.

Fig. 3 is a schematic view of a conventional coal drop pipe in the present utility model.

Fig. 4 is a cross-sectional view of a conventional coal drop tube in accordance with the present utility model.

Fig. 5 is a diagram showing the working principle of the utility model compared with a traditional coal dropping pipe.

The reference numbers shown in the drawings:

1. a coal bucket; 2. the frustum buffer communicating piece; 3. closing the coal dropping pipeline; 4. buffering bits; 41. a buffer stage; 6. a cleaning device; 7. a spiral cleaning device; 8. coal; 9. and cleaning the wear plate of the device.

Detailed Description

The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes or modifications may be made by those skilled in the art after reading the teachings of the utility model, and such equivalents are intended to fall within the scope of the utility model as defined herein.

As shown in fig. 3-5, the traditional shrimp-shaped coal hopper has overlarge upper and lower fall, and the opening below is smaller for matching with the diameter of a coal 8 conveying pipeline, so that the diameter of the smallest part is 1.2m for the convenience of understanding, the protection range is not involved, meanwhile, the data provided by the follow-up step is convenient for the convenience of understanding by a teacher of the inspector, the protection range is not involved, and the coal flow resistance is increased as the shrinkage rate of the section of the inverted cone-shaped coal bin is larger downwards, so that the coal pressure at the bottom layer of the inverted cone-shaped coal hopper is large, and the blockage phenomenon is easy to occur;

the utility model relates to an anti-blocking coal dropping pipe, which comprises a main structure, wherein the main structure comprises a coal bucket 1 and a plurality of frustum buffer communicating pieces 2, and the frustum buffer communicating pieces 2 are sequentially arranged according to the reduction of the diameter of an opening at the bottom as shown in figures 1 and 2, and are matched with the diameter of a coal 8 conveying pipeline to be issued, namely 1.2 meters marked in the drawing;

as shown in fig. 2 and 5, the diameter of the bottom opening of the conventional coal bucket 1 is enlarged, so that the blocking phenomenon can be greatly reduced, in the utility model, the data support is more visual, the protection range is not involved, in order to match the diameter of the coal 8 conveying pipeline of 1.2m, a plurality of frustum buffer communicating pieces 2 are arranged at the bottom of the coal bucket 1, after each frustum buffer communicating piece 2 passes through, the diameters of the coal 8 outlets are further reduced by the reference sign (1) (2) (3) in fig. 5, namely, the diameters of the bottom opening are reduced, in order, the diameters of the coal 8 outlets of the frustum buffer communicating pieces 2 at the bottommost side are the same as the diameters of the inlets of the normal coal 8 conveying pipeline, namely, the diameters of 1.2m in fig. 3 and 4 are reduced, namely, the upper bottom surfaces of the upper side frustum buffer communicating pieces 2 are connected with the lower bottom surfaces of the lower frustum, in order, in practical situations can be custom-set, the protection range of the utility model is not limited, and the diameters of the coal 8 conveying pipeline of the upper frustum buffer communicating pieces 2 and the diameters of the coal 8 are reduced to meet the requirements of the diameters of the coal 8 conveying pipeline of the prior art.

The greatest difference between the utility model and the traditional coal dropping pipe shown in the figures 3-5 is that, as described with reference to figures 1 and 5, the whole is in an inverted cone shape and fixedly connected end to form a closed coal dropping pipeline 3, the fixed connection mode is just to adopt welding, the whole is in an inverted cone shape, namely, the upper part is big and the lower part is small, which is a necessary condition for buffering coal 8, only in this way, the range of the coal 8 required by people can be narrowed from the outlet to a small extent, meanwhile, in the aspect of bearing pressure, the inlet is only slightly bigger than the outlet, the pressure of coal 8 at the bottom is smaller than that of coal 8 above, so that the blockage phenomenon is not easy to occur;

as described with reference to fig. 1, 2 and 5, by designing the diameter of the bottom side of the coal bucket 1 at the position of 1.2m in fig. 5 is enlarged to 1.5m, the coal 8 is not blocked at the position as shown in fig. 5, and then the coal 8 conveyed from the inlet of the coal 8 at the upper part is received by any frustum buffer communication piece 2 at the lower part, the diameter of the inlet and the diameter of the outlet of the coal 8 are not greatly different, most of the coal 8 can be directly input downwards from the outlet of the coal 8 at the lower part by virtue of self gravity, the coal 8 is not extruded at the outlet to cause blockage of a coal dropping pipe, and meanwhile, the frustum buffer communication piece 2 is assumed to be filled by the coal 8 to cause blockage;

at this time, as described with reference to fig. 1, 2 and 5, the buffer position 4 is a buffer table 41, because the above design can form a table top between two adjacent tables, as described in fig. 1, because the lower bottom surface of the lower frustum is larger than the upper bottom surface of the upper frustum, we are provided with a cleaning device 6 on the buffer table 41, the cleaning device 6 is fixed on the buffer table 41 and is attached to the side wall of the corresponding frustum buffer communicating piece 2 in parallel, as described with reference to fig. 2, further the cleaning device 6 is a spiral cleaning device 7, further the spiral cleaning device 7 is a double-spiral cleaning rod, and the cleaning mechanism cleans the root position where the blockage occurs, compared with the traditional beating mode, the cleaning efficiency is greatly improved, and the phenomenon of preventing the coal dropping pipe from being blocked is more beneficial; it should be noted that, as described with reference to the drawings, one end of the spiral cleaning device 7 is fixedly arranged on the buffer table 41, and the other end is free to droop, in order to protect the spiral cleaning device 7, the spiral rod of the spiral cleaning device 7 should not be too long, so that the length of the spiral rod of the spiral cleaning device 7 should be considered when the number of frustum buffer communicating pieces 2 is arranged subsequently;

finally, considering that coal extrudes the spiral cleaning device 7, the spiral cleaning device 7 is pressed on the side wall of the frustum buffer communication piece 2, so that the side wall of the frustum buffer communication piece 2 is damaged, and cleaning device anti-wear plates 9 are arranged at corresponding positions of the side wall of the frustum buffer communication piece 2 to protect the side wall of the frustum buffer communication piece 2 (as shown in fig. 2).

Claims (5)

1. An anti-blocking coal dropping pipe is characterized in that:

the coal bucket comprises a coal bucket (1) and a plurality of frustum buffering communicating pieces (2), wherein the frustum buffering communicating pieces (2) are sequentially arranged in a reduced mode according to the diameter of an opening at the bottom, and are integrally connected end to end in an inverted cone shape to form a closed coal dropping pipeline (3), and buffer positions (4) are formed at the end to end positions of two adjacent frustum connecting pieces;

the closed coal dropping pipeline (3) is fixedly connected to the pressure of the coal (8) at the bottom of the coal bucket (1) for buffering the coal (1) at the bottom of the coal bucket (1) to prevent blockage.

2. An anti-clogging coal chute as in claim 1 wherein: the buffer position (4) is a buffer table (41), a cleaning device (6) is arranged on the buffer table (41), and the cleaning device (6) is fixed on the buffer table (41) and is attached to the side wall of the corresponding frustum buffer communicating piece (2) in parallel.

3. An anti-clogging coal chute as in claim 2 wherein: the cleaning device (6) is a spiral cleaning device (7).

4. A choke-off preventing coal drop tube as set forth in claim 3, wherein: the spiral cleaning device (7) is a double-spiral line cleaning rod.

5. The anti-blocking coal drop pipe of claim 4, wherein: the anti-abrasion plate (9) of the cleaning device is arranged at the corresponding position of the side wall of the frustum buffering communication piece (2), and the spiral cleaning device (7) is tightly attached to the anti-abrasion plate (9) of the cleaning device.