Blockage removing machine for coal drop pipe and coal drop pipe

Abstract

The utility model provides a coal drop pipe blockage clearing machine and a coal drop pipe. The coal drop pipe unblocking machine comprises a motor, a speed reducer connected with the output end of the motor, a transmission shaft, a fastener, a fixing bolt and a scraper, one end of the transmission shaft is connected to the output end of the speed reducer, the scraper is vertically installed at the other end of the transmission shaft, the side, away from the speed reducer, of the scraper is fixed through the detachable fastener, and the fixing bolt is fixed to the end, away from the speed reducer, of the scraper. The fastener is sleeved on the transmission shaft, the transmission shaft extends out of the outer side of the fastener, and the fixing bolt is inserted on the outer side of the fastener. The transmission shaft is adopted to install the scraper, the scraper is locked on the scraper side through the detachable fastener, the scraper is effectively prevented from falling off, detachable installation of the scraper can be achieved, and later maintenance and replacement are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power plants, in particular to a coal chute clog clearing machine and a coal chute. Background Art

[0002] According to the design, the annual coal consumption of three units in a certain power plant is 4.11×10^4 t / a, and the daily coal consumption is about 1.3×10^4 t. The conveying capacity of the belt conveyor in the coal conveying system is 1000 t / h. The belt needs to run for 17 - 18 hours every day to meet the daily coal consumption of the boiler. The weather in the south is rainy, and the transported coal has a high moisture content, is wet and sticky. During the coal transfer process, the coal chute in the transfer station is prone to wall sticking and coal blockage, especially at the angled elbow of the coal chute. The coal blockage affects the coal conveying and needs to be cleaned in time.

[0003] The existing cleaning method generally uses a clog clearing machine. For example, the coal chute anti-blocking device disclosed in the existing patent publication number CN215508192U. During the coal conveying process, the clog clearing machine operates. The power is transmitted from the motor to the reducer, and then sequentially transmitted from the small gear and the large gear to the driving sprocket, and then drives the rotating body to rotate through the chain and the driven sprocket, thereby driving the scraper to rotate. The scraper is directly welded to the fastening sleeve, and the fastening sleeve is welded to the rotating body. On the one hand, since the scraper needs to rotate 360° continuously during the coal conveying process, the welding quality requirements are extremely high. Otherwise, there is a high risk of the scraper falling off. On the other hand, when the scraper reaches the end of its service life, it needs to be replaced. However, the welded fixing method makes it difficult to operate the replacement of the scraper. It is necessary to cut the weld on the rotating body for removal. When installing a new scraper, it is necessary to weld again. This affects the quality of the rotating body and also affects the reliability of the overall connection structure. In addition, this kind of clog clearing machine has a good application effect in a pipeline with a circular cross-section, but if the coal conveying pipe is a square pipe, the use effect is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a coal chute clog clearing machine and a coal chute that can prevent the scraper from falling off.

[0005] The technical solution of the utility model is: a coal chute clog clearing machine, including a motor, a reducer connected to the output end of the motor, a transmission shaft, a fastener, a fixing bolt and a scraper. One end of the transmission shaft is connected to the output end of the reducer, and a scraper is vertically installed at the other end of the transmission shaft. The side of the scraper away from the reducer is fixed by a detachable fastener. The fastener is sleeved on the transmission shaft, and the transmission shaft extends out of the outer side of the fastener, and the fixing bolt is inserted on the outer side.

[0006] In the above solution, the scraper is installed by using the transmission shaft, and the scraper is locked by a detachable fastener on the side of the scraper, which can realize the detachable installation of the scraper, cancel the welding, not only is it easy to maintain and replace later, but also effectively avoids the scraper from falling off.

[0007] Preferably, the transmission shaft includes a first shaft, a second shaft, a third shaft, and a fourth shaft arranged in sequence. One end of the fourth shaft away from the third shaft is connected to the speed reducer. The scraping blade is sleeved on the third shaft, the fastener is sleeved on the second shaft, and the fixing bolt is inserted into the first shaft.

[0008] Preferably, a keyway is provided on the third shaft, and a key for fixing the scraping blade is installed in the keyway.

[0009] Preferably, an external thread is provided on the outer circumferential surface of the second shaft. The fastener is a nut, and the fastener is threadedly connected to the second shaft.

[0010] Preferably, a through hole penetrating radially is provided on the first shaft, and the fixing bolt is installed in the through hole.

[0011] Preferably, the diameters of the first shaft, the second shaft, the third shaft, and the fourth shaft increase in sequence.

[0012] The present utility model further provides a coal dropping pipe, which includes a pipe and the above-mentioned coal dropping pipe clogging clearing machine installed on the side wall of the pipe. The speed reducer is installed on the outer side wall of the pipe, and the scraping blade is arranged adjacent to the inner side wall of the pipe inside the pipe.

[0013] Compared with the related art, the beneficial effects of the present utility model are as follows:

[0014] First, the coal dropping pipe clogging clearing machine of the present utility model uses a transmission shaft to install the scraping blade, and the scraping blade is locked by a detachable fastener on the side of the scraping blade, which can realize the detachable installation of the scraping blade, cancel welding, not only is it easy to maintain and replace in the later stage, but also effectively avoids the falling of the scraping blade;

[0015] Second, the scraping blade is limited by the axially installed fastener and the radially installed fixing bolt, which plays a dual insurance role and avoids the falling of the scraping blade. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram during the installation of the coal dropping pipe clogging clearing machine provided by the present utility model;

[0017] Figure 2 is a partial structural diagram of the transmission shaft.

[0018] In the drawings: 1, motor; 2, speed reducer; 3, transmission shaft; 31, first shaft; 32, second shaft; 33, third shaft; 34, fourth shaft; 35, keyway; 36, through hole; 4, fastener; 5, fixing bolt; 6, scraping blade; 7, pipe. Detailed Embodiments

[0019] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other. For the convenience of description, words such as "upper", "lower", "left", and "right" hereinafter only indicate the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure.

[0020] As Figure 1 shown, a coal chute clog clearing machine provided in this embodiment includes a motor 1, a speed reducer 2 connected to the output end of the motor 1, a transmission shaft 3, a fastener 4, a fixing bolt 5, and a scraper 6.

[0021] As Figure 1 , Figure 2 shown, the transmission shaft 3 includes a first shaft 31, a second shaft 32, a third shaft 33, and a fourth shaft 34 arranged in sequence. One end of the fourth shaft 34 away from the third shaft 33 is connected to the speed reducer 2. The diameters of the first shaft 31, the second shaft 32, the third shaft 33, and the fourth shaft 34 increase in sequence. The shafts with increasing diameters form shoulders at their ends. For example, one side of the scraper 6 abuts against the shoulder of the fourth shaft 34, and the thickness of the scraper 6 is greater than the axial length of the third shaft 33, so that the other side of the scraper 6 abuts against the fastener 4 threaded on the third shaft 33.

[0022] The scraper 6 is sleeved on the third shaft 33. A keyway 35 is provided on the third shaft 33, and a key for fixing the scraper 6 is installed in the keyway 35. The rotational force of the transmission shaft 3 is transmitted to the scraper 6 through the key.

[0023] External threads are provided on the outer circumferential surface of the second shaft 32. The fastener 4 is a nut, and the fastener 4 is threadedly connected to the second shaft 32.

[0024] A through hole 36 penetrating radially is provided on the first shaft 31, and the fixing bolt 5 is installed in the through hole 36.

[0025] As Figure 1 shown, the present utility model also provides a coal chute, which includes a pipe 7. The pipe 7 is a square pipe, and its side length is slightly larger than the length of the scraper 6. An opening is provided on the side wall of the pipe 7, and the above-mentioned coal chute clog clearing machine is installed at the opening. The speed reducer 2 is installed on the outer side wall of the pipe 7, and the scraper 6 is arranged adjacent to the inner side wall of the pipe 7 inside the pipe 7. During installation, the shoulder of the fourth shaft 34 slightly protrudes from the inner side wall of the pipe 7, so that a gap is formed between the scraper 6 installed on it and the inner side wall of the pipe 7. This gap is small and is only used for the scraper 6 to rotate without interference. During the coal transportation process, the coal adhered to the inner side wall of the pipe 7 is scraped off by the rotation of the scraper 6 to achieve the purpose of clog clearing.

[0026] In addition, the scraper 6 is a slender rod or plate with a small self-area, which will not cause secondary blockage of the material.

[0027] The coal chute unblocking machine provided by the present utility model is applied to a square coal conveying pipeline, and rotates 360° to scrape materials on the inner side wall of the square pipeline 7, which can ensure that the scraper 6 does not fall off during the service life, and avoid damage to the belt caused by scratching and tearing and equipment damage.

[0028] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A coal pipe blockage clearing machine, comprising a motor (1) and a reducer (2) connected to the output end of the motor (1), characterized in that: It also comprises a transmission shaft (3), a fastener (4), a fixing bolt (5) and a scraper (6), one end of the transmission shaft (3) is connected to the output end of the reducer (2), the other end of the transmission shaft (3) is vertically mounted with a scraper (6), the side of the scraper (6) away from the reducer (2) is fixed by a detachable fastener (4), the fastener (4) is sleeved on the transmission shaft (3), the transmission shaft (3) extends out of the outside of the fastener (4), and the fixing bolt (5) is inserted on the outside.

2. The coal drop pipe clearing machine according to claim 1, characterized in that: The transmission shaft (3) comprises a first shaft (31), a second shaft (32), a third shaft (33) and a fourth shaft (34) which are arranged in sequence; an end of the fourth shaft (34) which is away from the third shaft (33) is connected to the reducer (2); the scraper (6) is sleeved on the third shaft (33); the fastener (4) is sleeved on the second shaft (32); and the fixing bolt (5) is inserted into the first shaft (31).

3. The coal drop pipe clearing machine according to claim 2, characterized in that: The third shaft (33) is provided with a keyway (35), in which a key for fixing the scraper (6) is installed.

4. The coal drop pipe clearing machine according to claim 2, characterized in that: An external thread is provided on the outer circumferential surface of the second shaft (32); the fastener (4) is a nut; and the fastener (4) is threadedly connected to the second shaft (32).

5. The coal drop pipe clearing machine according to claim 2, characterized in that: The first shaft (31) is provided with a radially penetrating through hole (36), and the fixing bolt (5) is installed in the through hole (36).

6. The coal drop pipe clearing machine according to claim 2, characterized in that: The diameters of the first shaft (31), the second shaft (32), the third shaft (33), and the fourth shaft (34) increase in sequence.

7. A coal drop pipe, comprising a pipe (7), characterized in that: It also comprises a coal drop pipe blockage clearing machine as claimed in any one of claims 1 to 6, which is installed on the side wall of the pipeline (7), the reducer (2) is installed on the outer side wall of the pipeline (7), and the scraper (6) is arranged inside the pipeline (7) adjacent to the inner side wall of the pipeline (7).

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