Dust removal device for unloader of bulking machine

Abstract

The bulking machine unloader dust removal device comprises a negative pressure fan and a dust storage box, the left side of the dust storage box is connected with the right side of the outer circle of a cyclone separator through a connecting pipe, a plurality of small exhaust holes formed in the right side of the outer circle of the cyclone separator are all located in the connecting pipe, and an easily-replaced filter screen assembly dividing the interior of the dust storage box into a left cavity and a right cavity is arranged in the dust storage box; a center pipe is vertically arranged in the cyclone separator, the upper end of the center pipe penetrates through the top of the cyclone separator and is connected with the left cavity in the top of the dust storage box through an auxiliary air inducing pipe, and a lower port of the center pipe is adjacent to a discharging port in the lower end of the cyclone separator. Particles and dust generated by Chinese yam puffing balls in the cyclone separator are dedusted and collected, a grading filter screen is adopted in the dust storage box, collected large-particle materials are ground and then reused, dust collection can also be achieved at a discharging port of the cyclone separator, the workshop environment is not disturbed by dust any more, and therefore the body health of workers is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the processing technology field of yam powder, and particularly relates to a dust removal device for an expander unloader. BACKGROUND

[0002] In the processing of the expanded yam powder, the yam powder is cut into granules after being extruded and expanded by an expander, and is commonly called expanded ball due to the near-circular shape. The expanded ball contains a certain amount of water and has certain viscosity. A large-yield expander (70 or more) uses a pneumatic conveying system to convey the expanded ball to a cooling air bed for dehumidification and cooling. A cyclone separator is provided at the end of the pneumatic conveying system. The expanded ball is separated from the gas in the cyclone separator. The expanded ball is centrifugally rotated along the inner wall of the cyclone separator. Due to the effect of gravity, the expanded ball enters the lower part of the conical cylinder of the separator and then quickly falls into the inlet of the cooling air bed conveying belt. The outer cylinder of the upper part of the cyclone separator is cylindrical. An exhaust area is provided opposite the inlet of the cyclone separator. The exhaust area is uniformly provided with exhaust holes with a diameter of only one fifth of the diameter of the expanded ball. Small particles are generated during the process of cutting the expanded ball by the outlet rotary cutter of the expander. Small particles and dust are generated in the conveying pipeline due to the collision of the expanded ball. Due to the positive pressure in the cyclone, the small particles and dust are blown out of the exhaust holes of the exhaust area by the wind, which affects the production environment of the workshop. Moreover, the yam powder particles blown out by the wind cannot be eaten and are wasted. SUMMARY

[0003] To solve the above technical problems in the prior art, the utility model provides an expander unloader dust removal device capable of protecting the production environment of the expansion workshop and recovering small yam powder particles.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an expander unloader dust removal device, comprising a negative pressure fan and a dust storage box. The left side of the dust storage box is connected to the right side of the outer circle of a cyclone separator through a connecting pipe. A plurality of exhaust holes provided in the right side of the outer circle of the cyclone separator are located inside the connecting pipe. An easily replaceable filter screen assembly is arranged in the dust storage box to separate the inside of the dust storage box into a left chamber and a right chamber. The suction port of the negative pressure fan is connected to the top of the right chamber through a main air duct. A central pipe is vertically arranged in the cyclone separator. The upper end of the central pipe penetrates through the top of the cyclone separator and is connected to the left chamber at the top of the dust storage box through an auxiliary air duct. The lower end of the central pipe is adjacent to the discharge port at the lower end of the cyclone separator.

[0005] An air volume adjusting valve is arranged on the auxiliary air duct.

[0006] A left conical hopper is arranged below the left chamber at the bottom of the dust storage box. A left discharge pipe is connected to the lower end of the left conical hopper. A left discharge valve is arranged on the left discharge pipe.

[0007] The bottom of the dust storage box is provided with a right conical hopper below the right chamber, and a right discharge pipe is connected to the lower end of the right conical hopper, and a right discharge valve is arranged on the right discharge pipe.

[0008] The easily-replaceable filter screen assembly comprises an upper chute, a lower chute and a rectangular frame, the upper chute and the lower chute are arranged in the front-rear direction in length, and are fixed to the top and bottom of the inner wall of the dust storage box respectively, the front side of the dust storage box is provided with a vertical long slot, the upper end and the lower end of the slot are respectively penetrated by the upper chute and the lower chute, the rectangular frame is slidably arranged in the upper chute and the lower chute through the slot, a graded filter screen is arranged in the rectangular frame, a baffle is arranged at the front end of the rectangular frame to cover the slot, a cover plate is connected to the front side of the dust storage box by a first screw to cover the baffle, and a rectangular shallow groove is arranged on the rear side of the cover plate to accommodate the baffle.

[0009] The lower end of the main air duct is horizontally provided with an upper flange plate, the dust storage box is horizontally provided with a lower flange plate at the top of the right chamber, a dustproof filter screen is arranged between the bottom surface of the upper flange plate and the top surface of the upper flange plate, and the upper flange plate and the lower flange plate are connected by a second screw arranged in the vertical direction.

[0010] Compared with the prior art, the working principle and the beneficial effects of the utility model are as follows: the positive pressure air of the air conveying system conveys the puffed balls formed by puffing the shanyao powder through the puffing machine to the cyclone separator through the conveying pipeline, the puffed balls rotate in the cyclone separator by centrifugal force, and under the action of gravity, the puffed balls enter the lower conical cylinder of the cyclone separator and fall into the cooling air bed through the lower end port of the conical cylinder, and the fine particles or dust enters the dust storage box through the exhaust holes arranged on the right side of the cyclone separator, the negative pressure fan of the utility model is also started, the inside of the dust storage box is exhausted through the main air duct, the particles with a particle size greater than the graded filter screen are deposited in the left chamber, the dust with a particle size smaller than the graded filter screen is deposited in the right chamber, the graded filter screen divides the fine particles or dust into two kinds of particles with different particle sizes, the particles in the left chamber have a relatively large particle size, and need to be ground again when being recycled, and the dust in the right chamber has a small particle size and can be directly used without being ground.

[0011] The cyclone separator is internally provided with a central pipe, the lower end of the central pipe extends into the lower conical cylinder of the cyclone separator and is adjacent to the lower discharging port of the cyclone separator, the upper end of the central pipe is connected with the auxiliary air duct, and the negative pressure fan exhausts the dust from the discharging port of the cyclone separator through the auxiliary air duct and the central pipe, so that the dust or particles are sucked into the left chamber, and the dust is prevented from being generated at the discharging port.

[0012] Every time interval can open left discharge valve, discharge the particle size larger material stored in left chamber, carry out powder grinding and then utilize again, open right discharge valve, discharge the particle size smaller material stored in right chamber, directly utilize again.

[0013] When the classification filter screen is blocked, the first screw is disassembled, the cover plate is disassembled, the rectangular frame and the classification filter screen are extracted, new rectangular frame and classification filter screen are replaced, and then are inserted into the upper slide and the lower slide in the dust storage box, the cover plate is closed, and the first screw is screwed.

[0014] When the dust filter screen is blocked, the second screw is disassembled, the dust filter screen is extracted from between the upper flange plate and the lower flange plate, new dust filter screen is replaced, and the second screw is screwed.

[0015] The baffle plays the role of the first layer of sealing socket, and the cover plate plays the role of the second layer of sealing socket.

[0016] In conclusion, the novel design, simple structure, the shen yao puffed ball in the cyclone separator produced particulate matter and dust are collected and collected, the dust storage box adopts classification filter screen, the collected large particle material is ground and then utilized, the cyclone separator discharge port can also realize dust collection, so that the workshop environment is no longer disturbed by dust, so as to protect the health of workers. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a plane structure diagram of the rectangular frame and the classification filter screen;

[0019] Figure 3 It is Figure 2 the top view. DETAILED DESCRIPTION

[0020] The embodiment of the utility model is further described in detail in combination with the drawings and examples.

[0021] As Figures 1-3The utility model discloses an expander unloader dust removal device, including negative pressure fan 29 and dust storage tank 30, the left side of dust storage tank 30 is connected with the outer circle right side of cyclone separator 32 through connecting pipe 31, and the several exhaust small holes 33 of the outer circle right side of cyclone separator 32 are all located in the inside of connecting pipe 31, dust storage tank 30 is equipped with the easy replacement filter screen assembly that divides the left chamber 34 and right chamber 35 in dust storage tank 30, and the air intake of negative pressure fan 29 is connected with the top of right chamber 35 through main air duct 36, and the inside of cyclone separator 32 is equipped with center tube 37, and the upper end of center tube 37 passes through the top of cyclone separator 32 and is connected with the left chamber 34 of the top of dust storage tank 30 through auxiliary air duct 38, and the lower end of center tube 37 is adjacent to the lower end of cyclone separator 32 and is connected with the lower end of cyclone separator 32 and is connected with the lower end of cyclone separator 32.

[0022] Auxiliary air duct 38 is equipped with air volume regulating valve 40.

[0023] The bottom of dust storage tank 30 is equipped with left conical hopper 41 below left chamber 34, and left conical hopper 41 is connected with left discharge pipe 42, and left discharge pipe 42 is equipped with left discharge valve 43.

[0024] The bottom of dust storage tank 30 is equipped with right conical hopper 44 below right chamber 35, and right conical hopper 44 is connected with right discharge pipe 46, and right discharge pipe 46 is equipped with right discharge valve 47.

[0025] The easy replacement filter screen assembly includes upper slide 48, lower slide 49 and rectangular frame 50, and the length direction of upper slide 48 and lower slide 49 is along the front-back direction, and upper slide 48 and lower slide 49 are fixedly arranged on the top and bottom of the inner wall of dust storage tank 30, and the front side of dust storage tank 30 is equipped with vertical long strip-shaped socket, and the upper end and lower end of the open mouth are penetrated through upper slide 48 and lower slide 49 correspondingly, and rectangular frame 50 is slidably arranged in upper slide 48 and lower slide 49 through the socket, and rectangular frame 50 is equipped with graded filter screen 51, and the front end of rectangular frame 50 is equipped with baffle 52 covering the socket, and the front side of dust storage tank 30 is connected with cover plate 53 covering baffle 52 through first screw, and the rear side of cover plate 53 is equipped with rectangular shallow groove for accommodating baffle 52.

[0026] The lower end of main air duct 36 is horizontally equipped with upper flange plate, and the top of right chamber 35 is horizontally equipped with lower flange plate in dust storage tank 30, and dust filter screen 54 is arranged between the bottom surface of upper flange plate and the top surface of upper flange plate, and upper flange plate and lower flange plate are connected through the second screw arranged vertically.

[0027] The working principle and beneficial effects of the utility model are as follows: the positive pressure wind of the air conveying system conveys the puffed ball formed by puffing the yam powder through the puffing machine to the cyclone separator 32 through the conveying pipeline 45, the puffed ball rotates in the cyclone separator 32 by centrifugal force, under the action of its own gravity, the puffed ball enters the lower conical cylinder of the cyclone separator 32 downward, falls to the cooling wind bed through the lower end of the conical cylinder, and the fine particles or dust enter the dust storage box 30 through the several exhaust small holes 33 on the right side of the cyclone separator 32, the negative pressure fan 29 of the utility model is also started simultaneously, the inside of the dust storage box 30 is exhausted through the main air guide pipe 36, the particles with the particle size greater than the grading filter screen 51 deposit in the left chamber 34, the dust with the particle size smaller than the grading filter screen 51 enters the right chamber 35 through the grading filter screen 51 and deposits, the grading filter screen 51 divides the fine particles or dust into two kinds of different particle sizes, the particle size of the particles in the left chamber 34 is relatively large, and the particles need to be ground again when being recycled, and the particle size of the dust in the right chamber 35 is small, and the dust can be directly used without being ground.

[0028] The center pipe 37 is arranged in the cyclone separator 32, the lower end of the center pipe 37 extends into the lower conical cylinder of the cyclone separator 32 and is adjacent to the lower end of the cyclone separator 32, the upper end of the center pipe 37 is connected with the auxiliary air guide pipe 38, the negative pressure fan 29 sucks the dust of the lower discharge port 39 of the cyclone separator 32 through the auxiliary air guide pipe 38 and the center pipe 37, and the sucked dust or particles enter the left chamber 34, so that the dust is prevented from being generated at the lower discharge port 39. The suction air volume of the auxiliary air guide pipe 38 to the lower discharge port 39 of the cyclone separator 32 can be adjusted through the operation of the air volume adjusting valve 40, so that the puffed ball falling through the lower discharge port 39 of the cyclone separator 32 does not carry dust.

[0029] The left discharge valve 43 can be opened every certain period of time, the material with the relatively large particle size stored in the left chamber 34 is discharged, is ground after being recycled, the right discharge valve 47 is opened, and the material with the relatively small particle size stored in the right chamber 35 is directly recycled.

[0030] When the grading filter screen 51 is blocked, the first screw is disassembled, the cover plate 53 is disassembled, the rectangular frame 50 and the grading filter screen 51 are pulled out, new rectangular frame 50 and grading filter screen 51 are replaced, and are inserted into the upper slide 48 and the lower slide 49 in the dust storage box 30, the cover plate 53 is closed, and the first screw is screwed.

[0031] When the dust filter screen 54 is blocked, the second screw is disassembled, the dust filter screen 54 is pulled out from between the upper flange plate and the lower flange plate, new dust filter screen 54 is replaced, and the second screw is screwed.

[0032] The above examples illustrate the basic principles and characteristics of the present application, but the above only illustrates the preferred embodiments of the present application, and is not limited by the described embodiments. Those skilled in the art can make many forms of deformation and improvement under the inspiration of the present patent without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection scope of the present application. Therefore, the present application patent and the protection scope should be subject to the appended claims.

Claims

1. A dust removal device for an expander unloader, characterized in that: The dust storage box is connected with the right side of the outer circle of the cyclone separator through a connecting pipe, a plurality of exhaust holes opened on the right side of the outer circle of the cyclone separator are located inside the connecting pipe, the dust storage box is provided with a replaceable filter screen assembly for separating the dust storage box into a left chamber and a right chamber, the air suction port of the negative pressure fan is connected with the top of the right chamber through a main air duct, a center pipe is vertically arranged in the cyclone separator, the upper end of the center pipe penetrates through the top of the cyclone separator and is connected with the left chamber at the top of the dust storage box through an auxiliary air duct, and the lower end of the center pipe is adjacent to the discharge port at the lower end of the cyclone separator.

2. The expander unloader dust removal device of claim 1, wherein: The auxiliary air duct is provided with an air volume adjusting valve.

3. The expander unloader dust removal device of claim 1, wherein: The bottom of the dust storage box is provided with a left conical hopper below the left chamber, a left discharge pipe is connected to the lower end of the left conical hopper, and a left discharge valve is arranged on the left discharge pipe.

4. The expander unloader duster of claim 1, wherein: The bottom of the dust storage box is provided with a right conical hopper below the right chamber, a right discharge pipe is connected to the lower end of the right conical hopper, and a right discharge valve is arranged on the right discharge pipe.

5. The expander unloader duster of claim 1, wherein: The replaceable filter screen assembly comprises an upper slide, a lower slide and a rectangular frame, the lengths of the upper slide and the lower slide are arranged in the front-rear direction, the upper slide and the lower slide are fixed to the top and bottom inner walls of the dust storage box respectively, the front side of the dust storage box is provided with a vertical long slot, the upper end and the lower end of the slot are respectively penetrated by the upper slide and the lower slide, the rectangular frame is slidably arranged in the upper slide and the lower slide through the slot, the rectangular frame is provided with a graded filter screen, the front end of the rectangular frame is provided with a baffle for covering the slot, the front side of the dust storage box is connected with a cover plate for covering the baffle through a first screw, and the back side of the cover plate is provided with a rectangular shallow groove for accommodating the baffle.

6. The expander unloader dedusting device according to any one of claims 1-5, characterized in that: The lower end of the main air duct is horizontally provided with an upper flange, the dust storage box is horizontally provided with a lower flange at the top of the right chamber, a dustproof filter screen is arranged between the bottom surface of the upper flange and the top surface of the upper flange, and the upper flange and the lower flange are connected through a second screw arranged in the vertical direction.

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