CN204265038U - A kind of unpowered material blanking tube dust keeper - Google Patents

Abstract

A dust-proof device for a non-powered drop tube, comprising a drop tube (1); a variable-section tube (3) whose upper end communicates with the outlet of the drop tube (1); and a variable-section tube (3) ) connected to the lower end of the air locker (4); at least one air duct (2) whose upper end communicates with the drop pipe (1) and whose lower end communicates with the variable-section tube (3); the variable-section tube The section width of (3) is larger than that of the drop tube (1), and the outlet of the drop tube (1) extends below the top of the variable section tube (3). The amount of dust is suppressed, the purpose of dust removal is achieved, there is no power consumption, and the operating cost is low.

Description

A dust-proof device for unpowered feeding pipe

technical field

The utility model relates to a dust-proof device in the material transfer process, in particular to a dust-proof device for a blanking pipe in the bulk material transfer process.

Background technique

Bulk materials (such as coal, coke, ore, grain), etc. are generally transported during storage and transportation, from one (one) device (such as a belt conveyor) to another (one) device, common Such as: the transfer point of the transfer station; due to the bulk material will generate a lot of dust during the transfer, whereabouts and collision process, which will pollute the site and surrounding air; with the improvement of environmental protection requirements, the air dust pollution Prevention and treatment are becoming more and more important.

CN103754553A disclosed a dust suppression device for a bulk material transfer station drop pipe on April 30, 2014, specifically disclosing a dust suppression device for a bulk material transfer station drop pipe, including a frame, a bulk material drop pipe, There are dust collection hood, energy dissipation separator and dust collection fan on it, wherein the dust collection cover is connected with the dust inlet of the energy dissipation separator through the suction pipe, and the inlet of the dust collection fan is connected with the air outlet of the energy dissipation separator. A return air pipe is connected to the outlet of the dust collection fan, and the mouth of the dust collection cover is correspondingly arranged above the dust generation point on the bottom side of the bulk material discharge pipe, and the outlet of the dust collection fan communicates with the middle part of the bulk material discharge pipe through the return air pipe . During the falling process of the bulk material inside the discharge tube of the transfer station, it is mixed with some air and carried with it to accelerate the fall. When the bulk material is mixed with air and falls to the bottom of the discharge tube, the bulk material forms a dust point due to the accumulation and shearing effect. The air entrained in it is forced to carry the fine particles in the bulk material to spread to the surrounding space at a high speed. Under the action of the dust suction fan, the dust suction hood arranged above the dust generation point at the bottom of the discharge pipe quickly sucks the dust-laden gas into the dust suction pipe, and sends it into the energy dissipation separator to dissipate the dust with high kinetic energy and eliminate it. Dust separation. The structure of the dust suppressing device is relatively complicated, power consumption is required during operation, and the occupied space is also relatively large.

Utility model content

In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a dust removal device for a powerless drop pipe, which has the characteristics of high efficiency and no power consumption.

In order to solve the above-mentioned technical problems, the utility model provides a dust-proof device for a non-powered drop tube, which includes a drop tube; a variable-section tube whose upper end communicates with the discharge port of the drop tube; The air lock connected to the lower end of the lower end; at least one air duct whose upper end communicates with the falling pipe and whose lower end communicates with the variable section pipe; the section width of the variable section pipe is greater than the section width of the drop pipe, and the The discharge opening of the falling pipe extends below the top of the variable section pipe.

As a further improvement technical solution, the utility model provides the dust-proof device for the unpowered drop pipe, the upper port of the air pipe is inclined downward to communicate with the drop pipe; the lower port of the air pipe is connected with the variable section pipe The top is connected, and the position of the lower port of the air duct is higher than the position of the discharge port of the drop pipe.

As a preferred solution, in the dust-proof device for the unpowered drop pipe provided by the utility model, the section of the variable-section pipe is triangular.

As a preferred solution, in the dust-proof device for the unpowered drop pipe provided by the utility model, the section of the variable-section pipe is trapezoidal.

As a preferred solution, in the dust-proof device for the unpowered drop pipe provided by the utility model, the section of the variable section pipe is an inverted trapezoid.

In the case of no conflict, the above-mentioned improvements or preferred solutions can be implemented alone or in combination.

In the utility model, the cross-sectional size of the variable-section pipe changes relative to the cross-sectional size of the blanking pipe, and the cross-sectional area of the variable-section pipe is generally larger than the cross-sectional area of the blanking pipe; and the cross-sectional size of the variable-section pipe itself can be changed. It is also possible not to change.

In the technical scheme provided by the utility model, the induced wind brought in by the material falling from the falling pipe touches the bottom and spreads out to both sides of the variable section pipe, and then runs along the side wall. When it reaches the top of the variable section pipe, due to the falling Due to the blocking effect of the extension part of the material pipe, most of the induced wind will enter the air pipe on the side wall instead of passing through the outlet of the material pipe. The negative pressure area is formed in the discharge pipe due to the downward flow of the material and the air is taken away, while the variable cross-section pipe area forms a positive pressure area. A return circulation is formed among the air pipe, the blanking pipe and the variable section pipe. In addition to the external induced wind, the air supply source of the negative pressure area in the blanking pipe also increases the return air. The other end of the return air is in the positive pressure area, and its pressure is significantly greater than the pressure of the external induced wind, so that the external induced wind enters the blanking The air volume of the pipe is greatly reduced, the amount of externally induced wind is reduced, and the air volume that can cause backflow is also reduced. The amount of dust is naturally reduced, and the dust is suppressed to achieve the purpose of dust removal without power consumption and low operating costs.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the schematic diagram of the front view structure of the dust-proof device of the falling pipe in embodiment 1;

Fig. 2 is a left view structural schematic diagram of the dust-proof device for the drop pipe in Fig. 1;

Fig. 3 is a schematic diagram of the front view of the dust-proof device for the falling tube in Embodiment 2;

Fig. 4 is a schematic diagram of the front structure of the dust-proof device for the falling tube in Embodiment 3.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Embodiment 1: The dust-proof device for the unpowered drop tube shown in Figure 1 and Figure 2, comprising a drop tube 1, a variable-section tube 3 whose upper end communicates with the discharge port of the drop tube 1, and the The air locker 4 connected to the lower end of the variable-section pipe 3, the two upper ports are inclined downward to communicate with the discharge pipe 1, and the lower port is connected to the top of the variable-section pipe 3 Air duct 2, the air locker 4 is located on the belt conveyor 5, the cross-section of the variable-section pipe 3 is triangular, and its width is greater than the cross-sectional width of the drop pipe 1, and the discharge port of the drop pipe 1 extends below the top of the variable-section pipe 3; At the discharge port of the drop tube 1.

Embodiment 2: As shown in FIG. 3 , the dust-proof device for the unpowered drop pipe, on the basis of Embodiment 1, the cross-section of the variable-section pipe 3 is replaced with a trapezoid.

Embodiment 3: As shown in FIG. 4 , the dust-proof device for the unpowered drop pipe, on the basis of Embodiment 1, the cross-section of the variable-section pipe 3 is replaced with an inverted trapezoid.

During the operation, the induced wind brought in by the material falling from the blanking pipe 1 touches the bottom and spreads out to both sides of the variable-section pipe 3, and then runs along the side wall. When it reaches the top of the variable-section pipe 3, due to the falling Due to the blocking effect of the extension part of the pipe 1, most of the induced wind will enter the air pipe 2 on the side wall instead of passing through the outlet of the drop pipe 1. The negative pressure area is formed in the discharge pipe 1 due to the downward flow of the material and the air is taken away, while the area of the variable cross-section pipe 3 forms a positive pressure area. The effect makes the induced wind form a return air circulation among the air pipe 2, the blanking pipe 1 and the variable cross-section pipe 3. In addition to the external induced wind, the air replenishment source in the negative pressure area in the blanking pipe 1 also increases the return air. The air volume of the blanking pipe 1 is greatly reduced, the reduction of the inflow of externally induced wind, and the reduction of the air volume that can form backflow, the amount of dust naturally becomes smaller, and the dust is suppressed.

In other embodiments, on the basis of Embodiment 1, the dust-proof device for the non-powered drop pipe, the cross-section of the variable-section pipe 3 is replaced with a rectangle. It can also solve the same technical problem and has the same technical effect.

Apparently, the utility model is not limited to the above preferred embodiments, and can also be transformed and improved in various forms within the spirit of the claims of the utility model and the specifications, so as to solve the same technical problem and achieve the desired technical effect. Therefore no restatement. All the solutions that a person of ordinary skill in the art can directly or associate from the content disclosed in the utility model also belong to the protection scope of the utility model as long as they are within the spirit defined in the claims.

Claims (5)

1. A dust-proof device for a non-powered blanking tube, characterized in that: it includes a blanking tube (1); a variable-section tube (3) whose upper end communicates with the outlet of the blanking tube (1); An air locker (4) connected to the lower end of the variable-section pipe (3); at least one air pipe (2) whose upper end communicates with the discharge pipe (1) and whose lower end communicates with the variable-section pipe (3) The cross-sectional width of the variable-section pipe (3) is greater than that of the drop pipe (1), and the discharge port of the drop pipe (1) extends below the top of the variable-section pipe (3). 2. The dust-proof device for unpowered drop pipe according to claim 1, characterized in that: the upper port of the air duct (2) is inclined downward to communicate with the drop pipe (1); the air duct (2) ) communicates with the top of the variable section pipe (3), and the position of the lower port of the air pipe (2) is higher than that of the outlet of the discharge pipe (1). 3. The dust-proof device for unpowered drop pipe according to claim 1 or 2, characterized in that: the cross-section of the variable-section pipe (3) is triangular. 4. The dust-proof device for unpowered drop tube according to claim 1 or 2, characterized in that: the section of the variable section tube (3) is trapezoidal. 5. The dust-proof device for unpowered drop pipe according to claim 1 or 2, characterized in that: the cross-section of the variable-section pipe (3) is an inverted trapezoid.