CN204528550U - A kind of large drop coal spout with air return function - Google Patents

Abstract

The utility model relates to a large-drop coal drop pipe with return air function. Compared with the prior art, it solves the problem that the coal dust-containing air flow with a relatively high pressure at the bottom of the coal drop pipe overflows around the guide chute due to the impact of the coal flow, causing environmental pollution. Contamination defects. In the utility model, the coal falling pipe body is installed under the funnel at the head of the belt conveyor. An air lock is installed on the lower part of the coal falling pipe body. The upper part of the pipe wall of the coal falling pipe body has an upper opening, and the lower part of the pipe wall of the coal falling pipe body has a lower opening. , the upper end of the return air duct communicates with the upper port, and the lower end of the return air duct communicates with the lower port. The utility model connects the high-pressure airflow area at the bottom of the coal-falling pipe produced by falling coal flow with the upper low-pressure airflow area, and uses the pressure difference to guide the airflow containing coal dust to flow to the upper part of the coal-falling pipe.

Description

A large-drop coal drop pipe with return air function

technical field

The utility model relates to the technical field of coal-falling pipes, in particular to a large-drop coal-falling pipe with the function of returning air.

Background technique

In the belt conveying system of the power plant, in the various links of belt conveyor transfer, coal falls from the upper belt conveyor to the lower belt conveyor, and the coal dust < 200 μm will be lifted up with a dusty air flow, making the local air dusty and forming a dust source, falling After entering the air lock or material guide trough, the air around the dust source is induced and disturbed to form a high-pressure secondary airflow, which diffuses and spreads the primary dusty airflow to the surrounding air, resulting in environmental pollution. At present, ordinary coal falling pipes cannot guide the flow direction of the coal dust-containing airflow, and the coal dust-containing airflow spreads and overflows to the surroundings, resulting in poor working environment and serious on-site pollution. Therefore, how to guide the flow direction of the coal dust-containing airflow and prevent the coal dust airflow from overflowing the material guide groove has become an urgent technical problem to be solved.

Utility model content

The purpose of this utility model is to solve the defect in the prior art that the coal dust-containing air flow with a relatively high pressure overflows around the feeder chute due to the impact of the coal flow at the bottom of the coal falling pipe, resulting in environmental pollution, and provides a large air return function. Fall drop coal pipe to solve the above problems.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A large-drop coal drop pipe with return air function, including a funnel at the head of the belt conveyor, a coal drop pipe body, an air lock and a material guide groove. The coal drop pipe body is installed under the funnel at the head of the belt conveyor. The coal drop pipe The lower part of the body is equipped with an air locker, and the lower part of the air locker is installed in the material guide groove.

It also includes a return air duct, the upper part of the wall of the coal falling pipe body has an upper opening, the lower part of the coal falling pipe main body wall has a lower opening, and the upper opening and the lower opening are longitudinally corresponding, and the return air duct is installed on the On the pipe wall of the coal falling pipe body, the upper end of the return air duct communicates with the upper opening, and the lower end of the return air duct communicates with the lower opening.

It also includes the electric tee, the electric tee is installed between the belt conveyor head funnel and the coal drop pipe body, the bypass coal drop pipe is installed on the electric tee, and the bypass air locker is installed at the lower part of the bypass coal drop pipe , the lower part of the bypass air locker is installed in the bypass guide trough; the upper part of the bypass coal drop pipe wall is provided with a bypass opening, and the lower part of the bypass coal drop pipe wall is provided with a bypass lower port. The return air duct is installed on the pipe wall of the bypass coal drop pipe, the upper end of the bypass return air duct communicates with the bypass opening, and the lower end of the bypass return air duct communicates with the bypass lower opening.

A liner is installed on the inner wall of the coal drop pipe body.

The upper part of the lower opening of the coal drop pipe body is obliquely installed with a baffle plate facing the inside of the coal drop pipe body.

Beneficial effect

Compared with the prior art, the utility model has a large-drop coal drop pipe with return air function, which avoids the coal dust-containing air flow at the bottom of the coal drop pipe caused by the impact of the coal flow to diffuse and overflow around the guide chute, thereby The problem of polluting the environment. Through the design of the return air duct, the high-pressure airflow area at the bottom of the coal-falling pipe caused by the falling of coal flow is connected to the upper low-pressure airflow area, and the pressure difference is used to guide the airflow containing coal dust to the upper part of the coal-falling pipe. The invention has the characteristics of simple structure, strong practicability, low cost and suitable for popularization.

                           

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of another embodiment of the present utility model;

Among them, 1-coal drop pipe body, 2-return air duct, 3-bypass coal drop pipe, 4-bypass air locker, 5-bypass guide trough, 6-belt conveyor head funnel, 7-lock Air device, 8-material guide trough, 9-electric tee, 10-bypass return air duct, 11-upper port, 12-lower port, 13-lining plate, 14-baffle plate, 31-bypass port, 32 -Bypass Lower Exit.

Detailed ways

In order to have a further understanding and understanding of the structural features and the achieved effects of the utility model, a detailed description is provided in conjunction with preferred embodiments and accompanying drawings, as follows:

As shown in Figure 1, a large drop coal drop pipe with return air function described in the utility model includes a funnel 6 at the head of the belt conveyor, a coal drop pipe body 1, an air lock 7 and a material guide trough 8. The coal pipe body 1 is installed below the belt conveyor head funnel 6, and the coal stream transported from the belt conveyor head funnel 6 enters the coal drop pipe body 1. The bottom of the coal falling pipe body 1 is equipped with an air lock 7, and the bottom of the air lock 7 is installed in the material guide trough 8. Since the length of the coal falling pipe body 1 is large and the drop is large, if the coal falling pipe body 1 The coal flow directly falls in the material guide chute 8, and its huge impact force will damage the belt in the material guide chute 8. Therefore, an air lock 7 is installed between the bottom of the coal falling pipe body 1 and the material guide chute 8 to prevent coal The impact force of flow damages the belt in the material guide groove 8.

The upper part of the pipe wall of the coal falling pipe body 1 has an upper opening 11, and the lower part of the pipe wall of the coal falling pipe body 1 has a lower opening 12. The upper opening 11 and the lower opening 12 correspond longitudinally, and the upper opening 11 and the lower opening 12 are located in the same vertical direction. on-line. The return air duct 2 is installed on the pipe wall of the coal falling pipe body 1, and the return air duct 2 is attached to the coal falling pipe body 1. The upper end of the return air duct 2 communicates with the upper port 11, and the lower end of the return air duct 2 communicates with the lower port 12, so that the coal flow can directly enter the gas locker 7 through the coal falling pipe body 1 to reach the material guide trough 8, and the coal flow in The coal dust airflow produced in the falling process can enter the lower end of the return air duct 2 from the lower opening 12 of the coal falling pipe body 1, and then enter the upper opening 11 of the coal falling pipe body 1 through the upper end of the return air duct 2.

In order to prevent the coal falling pipe body 1 from being worn by the coal flow, a liner 13 can be installed on the inner wall of the coal falling pipe body 1 to prevent the coal flow from hitting the wall of the coal falling pipe body 1, wear it through, and prolong the coal falling. The service life of pipe body 1. The top of the lower opening 12 on the coal drop pipe body 1 can also be inclined to install a baffle plate 14, and the baffle plate 14 can prevent the coal flow from entering the return air duct 2 towards the inside of the coal drop pipe body 1. Similarly, the baffle plate 14 can also be installed obliquely on the upper part of the upper opening 11 on the coal falling pipe body 1, and the baffle plate 14 is also facing the inside of the coal falling pipe body 1, so as to better ensure that only the air flow containing coal dust in the return air duct 2 , to ensure the unimpeded flow of the return air duct 2.

As shown in Figure 2, as another embodiment of the present utility model, when the coal flow requires the electric tee 9 to switch the coal flow channel and the drop is large, the electric tee 9 is installed on the belt conveyor head funnel 6 and the coal drop Between the pipe body 1, the bypass coal drop pipe 3 is installed on the electric tee 9. The import of electric tee 9 is contained on the belt conveyor head funnel 6, and two outlets of electric tee 9 are contained on the coal-falling pipe body 1 and the bypass coal-falling pipe 3 respectively. Equally, because the drop of bypass coal drop pipe 3 is bigger, the bottom of bypass drop coal pipe 3 is equipped with bypass air locker 4, and the bottom of bypass air locker 4 is installed in bypass guide chute 5. The installation structure of the bypass coal drop pipe 3 and the bypass return air duct 10 is the same as that of the coal drop pipe body 1 and the return air duct 2. The upper part of the bypass coal drop pipe 3 pipe wall has a bypass outlet 31, and The bottom of the road coal drop pipe 3 pipe wall has a bypass lower opening 32, the bypass return air duct 10 is installed on the pipe wall of the bypass coal drop pipe 3, and the bypass return air duct 10 upper end communicates with the bypass outlet 31, The lower end of the bypass return air duct 10 communicates with the bypass lower port 32 .

In actual use, when the coal flow enters the coal drop pipe body 1 from the funnel 6 at the head of the belt conveyor, and then enters the material guide groove 8 through the coal drop pipe body 1 through the air locker 7 . When coal flows through the coal falling pipe body 1 and falls, the impact airflow generated produces a high-pressure airflow zone at the bottom of the coal falling pipe body and the air locker 7. Since the return air duct 2 connects the lower port 12 and the upper port 11 of the coal falling pipe body 1, that is, it connects the high-pressure airflow area (lower port 12) and the upper low-pressure airflow area (upper port 11) of the coal falling pipe body 1. , use the pressure difference to guide the airflow containing coal dust to flow to the upper part of the coal drop pipe body 1, thereby avoiding the coal dust flow with high pressure caused by the impact of the coal flow at the bottom of the coal drop pipe to flow to the gas locker 7 and overflow from the surroundings of the material guide groove 8 The problem of polluting the environment.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A large-drop coal drop pipe with air return function, including the funnel (6) at the head of the belt conveyor, the coal drop pipe body (1), the air lock (7) and the material guide groove (8), and the coal drop pipe The body (1) is installed under the funnel (6) at the head of the belt conveyor, and the lower part of the coal falling pipe body (1) is installed with an air locker (7), and the lower part of the air locker (7) is installed in the material guide trough (8 ), characterized by: It also includes a return air duct (2), the upper part of the pipe wall of the coal falling pipe body (1) has an upper opening (11), the lower part of the pipe wall of the coal falling pipe body (1) has a lower opening (12), and the upper The port (11) corresponds to the lower port (12) longitudinally, the return air duct (2) is installed on the pipe wall of the coal falling pipe body (1), and the upper end of the return air duct (2) is connected to the upper port (11) communicated, the lower end of the return air duct (2) communicates with the lower port (12). 2. A large-drop coal drop pipe with air return function according to claim 1, characterized in that it also includes an electric tee (9), which is installed on the funnel (6) at the head of the belt conveyor ) and the coal drop pipe body (1), the bypass coal drop pipe (3) is installed on the electric tee (9), and the lower part of the bypass coal drop pipe (3) is installed with a bypass air locker (4) , the bottom of the bypass air locker (4) is installed in the bypass guide trough (5); the upper part of the wall of the bypass coal drop pipe (3) has a bypass port (31), and the bypass coal drop pipe ( 3) The lower part of the pipe wall is provided with a bypass lower port (32), and the bypass return air duct (10) is installed on the pipe wall of the bypass coal drop pipe (3). The road opening (31) communicates, and the lower end of the bypass return air duct (10) communicates with the bypass lower opening (32). 3. A large-drop coal drop pipe with return air function according to claim 1, characterized in that: a liner (13) is installed on the inner wall of the coal drop pipe body (1). 4. A large-drop coal drop pipe with return air function according to claim 1, characterized in that: the upper part of the lower opening (12) of the coal drop pipe body (1) is obliquely installed with a baffle plate (14), the baffle (14) faces the inside of the coal falling pipe body (1).