Powder conveying equipment

Abstract

The utility model discloses a powder conveying device which comprises a stock bin with openings in the upper end and the lower end, an intermittent batching mechanism is arranged at the bottom of the stock bin, a mixer is arranged at the bottom of the intermittent batching mechanism, and raw materials in the stock bin are intermittently fed into the mixer through the intermittent batching mechanism; the mixer comprises a trumpet-shaped body, a straight mixing pipe is arranged at the bottom of the body, an air inlet pipe is arranged at the bottom of the straight mixing pipe, a discharging pipe is arranged on the side wall of the body, the diameter of the air inlet pipe is larger than that of the discharging pipe, the tail end of the air inlet pipe is connected with an air blower, and the air blower is connected with the air inlet pipe. The intermittent batching mechanism is controlled to drive the powder to enter the mixer under the action of gravity in an intermittent mode, intermittent feeding is achieved, and therefore long-distance air blowing feeding is achieved through the air blower.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mechanical devices, more particularly to a kind of powder conveying equipment. BACKGROUND

[0002] Powder plays a very important role in industrial production, is the indispensable raw material of many industries, powder needs to be conveyed in the processing process, the prior art adopts two ways to convey, one is to extend suction pipe into bin or barrel, and the powder is conveyed by fan, in this process, the nozzle of suction pipe needs to be higher than the surface of powder;Another is to install conveyor at the bottom of bin, and the powder is conveyed by the spiral in the conveyor.When it is needed to convey powder directly from processing bin, the prior art uses conveyor to convey, and does not use fan to convey, because the powder in bin is accumulated together under the action of gravity, general fan conveying cannot meet the requirements, and the raw material in bin has to be conveyed to another bin or barrel by conveyor first, and then suction pipe is used to cooperate with fan to convey, resulting in complex production process and increased equipment investment cost.In view of the above defects, it is necessary to design a kind of powder conveying equipment. SUMMARY

[0003] The utility model aims at providing a kind of powder conveying equipment, which conveys material at a long distance by air blower at the bottom of bin, and avoids the adverse effects such as extrusion, adhesion and caking of powder in bin, and improves conveying efficiency.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of powder conveying equipment, including bin with upper and lower openings, the bottom of the bin is provided with intermittent batching mechanism, the bottom of the intermittent batching mechanism is provided with mixer, and the intermittent batching mechanism intermittently sends raw materials in the bin into the mixer;The mixer includes a body shaped as a horn, the bottom of the body is provided with a mixing straight pipe, the bottom of the mixing straight pipe is provided with an air inlet pipe, the sidewall of the body is provided with a discharge pipe, the diameter of the air inlet pipe is greater than that of the discharge pipe, the end of the air inlet pipe is connected with an air blower, and the axis of the air inlet pipe is not collinear with that of the mixing straight pipe, because the diameter of the air inlet pipe is greater than that of the discharge pipe and the axis of the air inlet pipe is not collinear with that of the mixing straight pipe, when the air blower blows air into the air inlet pipe, the air in the mixing straight pipe is subjected to change direction and the outlet diameter is reduced, so that the wind pressure is increased and turbulence occurs, the powder falling from the body is broken by the action of turbulence in the mixing straight pipe and the impact with the inner wall of the mixing straight pipe, and then flows out through the discharge pipe.

[0005] The utility model is further improved as follows:

[0006] Further, the intermittent feeding mechanism comprises a shell with an upper opening and a lower opening, a driving device is arranged on the outer side of the shell, and an impeller is arranged on the inner side of the shell.

[0007] Further, the driving device is a stepping motor.

[0008] Further, the mixing straight pipe is further provided with a flow guide, which is arranged at the bottom of the mixing straight pipe and is integrally connected with the air inlet pipe.

[0009] Further, a cover is further arranged on the top of the bin.

[0010] Further, a dust suction mechanism is further arranged, and the number of the dust suction mechanisms is two, which are symmetrically arranged along the bin.

[0011] Further, the dust suction mechanism comprises a dust suction pipe, which is arranged on the outer side of the bin, a filter is arranged on the top of the dust suction pipe, a pulse valve is arranged on the outer side of the filter, and an air blower is arranged on the top of the filter.

[0012] Further, the air blower is a Roots blower.

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

[0014] 1. When the air blower blows air into the air inlet pipe, the air in the mixing straight pipe is subjected to change of direction and decrease of outlet diameter, so that the wind pressure is increased and turbulence occurs, the powder falling from the body is broken by the action of the turbulence and the impact with the inner wall of the mixing straight pipe in the mixing straight pipe, so that the powder is effectively prevented from being squeezed and bonded into lumps in the bin, and the conveying efficiency is improved.

[0015] 2. The driving device drives the impeller to rotate in the shell by a set angle, so as to drive the powder to enter the mixer under the action of gravity, intermittent feeding is realized, and then the air blowing feeding by the air blower is facilitated.

[0016] 3. The cover and the dust suction mechanism jointly form a micro-negative pressure, which effectively prevents the powder particles from escaping, that is, the powder is recycled, and environmental pollution is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 show the front view of the utility model

[0018] Figure 2 show the three-dimensional view of the intermittent feeding mechanism of the utility model

[0019] Figure 3 show the structure schematic view of the mixer of the utility model

[0020] Figure 4The dust absorption mechanism structure schematic view of the utility model is shown

[0021] In the drawing: bin 1, intermittent batching mechanism 2, mixer 3, air blower 4, cover 5, dust absorption mechanism 6, shell 201, driving device 202, impeller 203, body 301, mixing straight pipe 302, air inlet pipe 303, discharge pipe 304, flow guide 305, dust absorption pipe 601, filter 602, pulse valve 603, air induction fan 604, arc-shaped material falling surface 605. DETAILED DESCRIPTION

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 indicated, a kind of powder conveying equipment, including the bin 1 of upper and lower two ends opening, the bottom of the bin 1 is equipped with intermittent batching mechanism 2, the bottom of the intermittent batching mechanism 2 is equipped with mixer 3, the intermittent batching mechanism 2 will be intermittently sent into the powder in the bin 3 into mixer 3;The mixer 3 includes the body 301 of shape as horn, the bottom of the body 301 is equipped with mixing straight pipe 302, the bottom of the mixing straight pipe 302 is equipped with air inlet pipe 303, the sidewall of the body 301 is provided with discharge pipe 304, the diameter of the air inlet pipe 303 is greater than the diameter of discharge pipe 304, the terminal of the air inlet pipe 303 is connected air blower 4, the axis of the air inlet pipe 303 is not collinear with the axis of mixing straight pipe 302, since the diameter of the air inlet pipe 303 is greater than the diameter of discharge pipe 304 and the axis of the air inlet pipe 303 is not collinear with the axis of mixing straight pipe 302, when air blower 4 is into the air inlet pipe 303 with air, the air in mixing straight pipe 302 is acted on by the common effect of direction change and outlet diameter reduction and wind pressure increases and appears turbulence, the powder falling in the body 301 is broken by the action of turbulence in mixing straight pipe 302 and the impact with mixing straight pipe 302 inner wall, and then flows out through discharge pipe 304.

[0023] In the embodiment, as Figure 3 indicated, to guide powder and mixing straight pipe 302 to impact, flow guide 305 is arranged on the mixing straight pipe 302, the flow guide 305 is arranged at the bottom of mixing straight pipe 302 and is integrally connected with air inlet pipe 303, obtuse angle is formed between the flow guide 305 and the axis of air inlet pipe 303, when compressed air enters mixing straight pipe 302 through air inlet pipe 303, compressed air rises along flow guide 305 after contacting flow guide 305, at this time, it changes direction again by meeting the powder falling in the body 301, compressed air drives powder to form annular vortex, under the condition of continuous acceleration, it flows out through discharge pipe 304, the time of powder in mixing straight pipe 302 being acted on by turbulence and impacting with mixing straight pipe 302 inner wall is prolonged, prevents powder from caking, and improves conveying efficiency.

[0024] In this embodiment, the blower 4 is selected as a Roots blower, which has stable mechanical structure, good air volume stability, and large conveying capacity and conveying distance.

[0025] In this embodiment, as shown in Figure 2 The intermittent feeding mechanism 2 includes an upper and lower open housing 201, the outer side of which is provided with a driving device 202, and the inner side of which is provided with an impeller 203. The driving device 202 drives the intermittent rotation of the impeller 203 in the housing 201. The impeller 203 has a plurality of sets of equidistantly arranged blades (not shown in the figure). Two adjacent blades and the housing form a temporary buffer bin. The powder in the bin 1 falls into the buffer bin for storage. A stepping motor or a servo motor is selected as the driving device 202. The driving device 202 drives the rotation of the impeller 203 in the housing 201 by a set angle, thereby driving the rotation of the buffer bin in the housing 201. When the buffer bin 201 containing powder rotates above the mixer 3, the powder falls under the action of gravity, realizing intermittent feeding.

[0026] In this embodiment, in order to avoid the overflow of powder during the conveying of the bin, a cover 5 is provided at the top of the bin 1 to prevent the overflow of powder from the top. Meanwhile, two dust collection mechanisms 6 are symmetrically installed at the outer wall of the bin 1. The dust collection mechanism 6 includes a dust collection pipe 601, which is provided outside the bin 1. The top of the dust collection pipe 601 is provided with a filter 602. The outer side of the filter 602 is provided with a pulse valve 604. The top of the filter 602 is provided with an induced draft fan 603. Under the action of the induced draft fan 603, the inlet of the dust collection pipe 601 is in a micro-negative pressure state. The powder particles enter the dust collection pipe 601 under the action of negative pressure. Since the filter 602 is provided between the dust collection pipe 601 and the induced draft fan 604, the filter screen in the filter 602 captures and collects the powder. Meanwhile, the pulse valve 604 is installed outside the filter 602. The powder in the filter 602 is blown off to the bin 1 by the intermittent blowing of compressed air.

[0027] In order to facilitate the falling of the powder, the bottom of the dust collection pipe 601 is provided with an arc-shaped material falling surface 605. The powder blown off by the pulse valve slides into the bin along the arc-shaped material falling surface 605 under the action of gravity, that is, the powder is recovered, and the filter screen is cleaned.

[0028] In summary, during the operation of the powder conveying device, the driving device 202 (a stepping motor or a servo motor) provided in the intermittent batching mechanism 2 drives the impeller 203 to rotate in the shell 201 by a set angle, thereby driving the powder falling from the hopper 1 to enter the mixer 3, when the air blower 4 blows air into the air inlet pipe 303, the air in the mixing straight pipe 302 is subjected to the interaction of the change of direction and the decrease of the outlet diameter, so that the air pressure is increased and the turbulence occurs, the powder falling from the body 301 is broken by the action of the turbulence in the mixing straight pipe 302 and the impact with the inner wall of the mixing straight pipe 302, and then flows out through the discharge pipe 304, so that the long-distance conveying is realized, and the powder is effectively prevented from being bonded into blocks, and the conveying efficiency is improved.

[0029] The utility model is not limited to the above-mentioned specific implementation, and the ordinary skilled in the art falls in the protection scope of the utility model from the above concept, and all kinds of changes made without creative labor.

Claims

1. A powder delivery apparatus, characterized by The application relates to a material bin with both upper and lower openings, the bottom of the material bin is provided with an intermittent feeding mechanism, the bottom of the intermittent feeding mechanism is provided with a mixer, and the intermittent feeding mechanism intermittently feeds raw materials in the material bin into the mixer; The mixer comprises a horn-shaped body, the bottom of the body is provided with a mixing straight pipe, the bottom of the mixing straight pipe is provided with an air inlet pipe, the axis of the air inlet pipe is not collinear with the axis of the mixing straight pipe, a discharging pipe is arranged at the side wall of the body, the diameter of the air inlet pipe is larger than the diameter of the discharging pipe, and the end of the air inlet pipe is connected with a blower.

2. The powder delivery apparatus of claim 1, wherein The intermittent feeding mechanism comprises an upper and lower opening shell, the outer side of the shell is provided with a driving device, and the inner side of the shell is provided with an impeller; the driving device drives the impeller to intermittently rotate in the shell.

3. The powder delivery apparatus of claim 2, wherein The driving device is a stepping motor.

4. The powder delivery apparatus of claim 1, wherein The mixing straight pipe is further provided with a flow guide piece which is arranged at the bottom of the mixing straight pipe and is integrally connected with the air inlet pipe.

5. The powder delivery apparatus of claim 1, wherein The application further comprises a cover which is arranged at the top of the material bin.

6. The powder delivery apparatus of claim 5, wherein The application further comprises two dust suction mechanisms which are symmetrically arranged along the material bin.

7. The powder delivery apparatus of claim 6, wherein The dust suction mechanism comprises a dust suction pipe which is arranged at the outer side of the material bin, the top of the dust suction pipe is provided with a filter, the outer side of the filter is provided with a pulse valve, and the top of the filter is provided with an air guide fan.

8. The powder delivery apparatus of claim 1, wherein The blower is a Roots blower.

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