Blanking device for spiral conveying elbow pipe

Abstract

The utility model relates to a blanking device for a spiral conveying elbow pipe. The blanking device comprises a conveying pipe and a spiral propeller, the conveying pipe is provided with a first pipe body and a second pipe body which are not coaxial and communicate with each other, a feeding port is formed in the top of the first pipe body, the second pipe body is a bent pipe, and the end, away from the first pipe body, of the second pipe body faces downwards to form a discharging port. The spiral propeller is installed on the conveying pipe, a spiral blade of the spiral propeller is located in the first pipe body, and the tail end of the spiral blade extends into the second pipe body. According to the discharging device for the spiral conveying elbow pipe, the tail end of the spiral blade of the spiral propeller extends into the pipe body II, limestone powder is conveyed and operated towards one direction all the time under the thrust action of the spiral blade, powdery materials are extruded mutually under the influence of the resistance of the elbow pipe, the whole cavity of the conveying pipe is filled with the limestone powder, and the discharging effect is good. Water vapor is prevented from entering the powder bin, and the phenomenon of gypsum caking generated after limestone powder and water vapor are combined is completely eradicated.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder material unloading technical field especially relates to a spiral conveying elbow pipe unloading device. BACKGROUND

[0002] The limestone-gypsum method desulfurization process is widely used in the flue gas desulfurization of thermal power plants, and the limestone powder slurry process is one of the main processes in the wet desulfurization process. The limestone is crushed, ground and other processes to make it into powder, and the limestone powder is transported to the powder bin for use. Below the limestone powder bin is a slurry tank. In the slurry tank, limestone powder and water are mixed in a certain proportion, and simultaneous uninterrupted stirring is performed to form a uniform slurry. A star-type unloader and an electric gate valve are installed between the limestone powder bin and the slurry tank, as shown in FIG. 1, the star-type unloader and the electric gate valve are arranged in an up-down layout structure to meet the requirements of lime water slurry concentration control and achieve the purpose of slurry process technical requirements. The star-type unloader is also called a wind-off machine, which is widely used in the power, grain deep processing, feed, cement, chemical, steel and iron metallurgy industries, such as coal powder, coal ash, slag, wheat flour, corn flour, rice flour, feed, cement, iron powder, aluminum powder and other powder materials. In the actual operation process, the star-type unloader (wind-off machine) is prone to material accumulation and blockage of the material conveying pipeline due to poor sealing performance and intermittent unloading, resulting in high failure rate and large wear and tear. Figure 1

[0003] ​In the actual operation of the existing limestone-gypsum desulfurization process, the limestone powder in the powder bin is transported by a star-shaped unloader, and is discharged to the mixing tank through the electric gate valve to mix with process water. Since a large amount of heat is generated after the limestone powder is mixed with water, water vapor is generated, and the rising water vapor contacts the limestone powder deposited in the electric gate valve, which causes the limestone powder to solidify and harden over time, resulting in the jamming of the gate rail and the failure of the electric gate valve to work normally. In actual application conditions, the valve is in an open state for a long time, and the function of the valve is basically lost, which is virtually useless. In the rotary discharge of the star-shaped unloader, the upper part of the star-shaped impeller cavity receives the material, and the discharge is carried out at the lower part. The cavity after the discharge is filled with rising water vapor, and the surface of the impeller cavity is covered with gypsum scale. The gypsum scale on the surface of the impeller cavity becomes thicker and thicker until it covers the entire impeller cavity. At the same time, the water vapor also contacts the limestone powder at the bottom of the powder bin when it rotates to the upper part, which causes the limestone powder to solidify and harden, affecting normal discharge and causing uneven discharge. After the small block-shaped material is discharged, if it cannot be dispersed by the stirring impeller, it will be solidified and deposited at the bottom, which may cause the slurry filter screen and the output process pipeline to be blocked. When the water vapor and the limestone powder block seriously, the powder bin cannot be discharged, and the impeller cavity of the star-shaped unloader and the internal part of the lower cone of the powder bin are completely solidified. Therefore, the device must be stopped, and manual cleaning is required to restore normal operation. On the other hand, the particles in the limestone powder seriously wear the shaft end seals of the star-shaped unloader, which often fails to seal, resulting in powder leakage, which directly affects the service life of the speed reducer and the working environment. Practical new type content

[0004] Therefore, the utility model discloses a spiral conveying elbow pipe unloading device to solve the problems existing in the star-shaped unloader used for discharging limestone powder between the limestone powder bin and the mixing tank in the limestone powder slurry preparation process.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model discloses a spiral conveying elbow pipe unloading device, which comprises a conveying pipe and a spiral propeller.

[0007] The spiral conveying elbow pipe blanking device provided by the utility model, the end of the spiral blade of the spiral propeller extends to the inside of the second pipe body, under the action of the thrust of the spiral blade, the limestone powder always runs in one direction, under the influence of the resistance of the elbow pipe, the powdery materials are extruded mutually, the limestone powder fills the whole cavity of the conveying pipe, the powder bin at the upper end of the blanking device and the size mixing tank at the lower end play the effect of complete sealing and isolation, there is no air leakage gap and cavity, so that the effect of preventing the water vapor from rising is achieved, the water vapor is prevented from entering the powder bin, the phenomenon of gypsum agglomeration after the combination of the limestone powder and the water vapor is completely eliminated, the blanking function is stable and reliable, the size mixing process of the limestone powder is positively affected to stably run, the blanking cannot be normally performed due to the material agglomeration, the safety hidden danger is eliminated, the maintenance intensity is reduced, the economic benefit of the enterprise is improved, and the on-site environment and the safety production are important.

[0008] As a further improvement of the above-mentioned scheme of the utility model, the first pipe body is a straight pipe, and the second pipe body is a semicircular elbow pipe or a 90-degree elbow pipe.

[0009] As a further improvement of the above-mentioned scheme of the utility model, one end of the second pipe body is provided with a flange plate one, one end of the first pipe body is provided with a flange plate two, the flange plate one is attached to the flange plate two, and the flange plate one and the flange plate two are connected in sealing fit through a plurality of bolts.

[0010] As a further improvement of the above-mentioned scheme of the utility model, the top of the first pipe body is provided with a feeding bin, and the top of the feeding bin is open to form the feeding port.

[0011] As a further improvement of the above-mentioned scheme of the utility model, the top edge of the feeding bin is integrally formed with a connecting flange.

[0012] As a further improvement of the above-mentioned scheme of the utility model, the spiral propeller comprises a motor, a speed reducer, a driving shaft and a spiral blade one, the motor is in transmission connection with the speed reducer, the driving shaft is coaxially arranged with the first pipe body, one end of the driving shaft is in transmission connection with the speed reducer and the other end of the driving shaft extends into the first pipe body, and the spiral blade one is arranged in the first pipe body and is spirally installed on the driving shaft.

[0013] As a further improvement of the above-mentioned scheme of the utility model, the speed reducer is connected with the first pipe body through a sealing sleeve, the sealing sleeve is in communication with the inside of the first pipe body and has a pipe diameter smaller than that of the first pipe body, and the driving shaft is provided with a spiral blade two outside the section located in the sealing sleeve.

[0014] As a further improvement of the above-mentioned scheme of the utility model, the motor is a variable frequency motor.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The spiral conveying elbow pipe blanking device provided by the utility model, the end of the spiral blade of the spiral propeller extends to the second pipe body, the limestone powder is always conveyed in one direction under the action of the thrust of the spiral blade, the powdery material is extruded under the influence of the resistance of the elbow pipe, the limestone powder fills the entire cavity of the conveying pipe, the powder bin at the upper end of the blanking device and the size mixing tank at the lower end play a complete sealing isolation effect, there is no air leakage gap and cavity, so that the effect of preventing water vapor from rising is achieved, water vapor is prevented from entering the powder bin, the phenomenon of gypsum agglomeration after the combination of limestone powder and water vapor is completely eliminated, the blanking function is stable and reliable, the size mixing process of the limestone powder is positively affected to stably operate, the blanking cannot be normally carried out due to material agglomeration, the safety hidden danger is eliminated, the maintenance intensity is reduced, the economic benefit of the enterprise is improved, and it has important significance for improving the on-site environment and safety production.

[0017] 2. The utility model discloses simple structure, single equipment, do not need to set up electric gate valve, and under the condition of not needing the gate valve, the isolation sealing performance is stable, there is no water vapor penetration gap condition, can completely overcome the defects of the prior art limestone powder blanking, accurately control the blanking speed, improve the blanking effect, eliminate the safety hidden danger, reduce the maintenance intensity, improve the equipment safe operation efficiency.

[0018] 3. The end of the spiral blade in the utility model is in a non-contact suspended state in the second pipe body, the reducer end of the spiral propeller adopts a sealing sleeve design, the limestone powder material is continuously conveyed to the end of the spiral blade, the limestone powder material is always conveyed in one direction, the material will not enter the sealing sleeve, the sealing sleeve does not contact the material, and the sealing performance is not affected, further, the second spiral blade is arranged on the section of the driving shaft located in the sealing sleeve, further preventing the limestone powder material from affecting the shaft end sealing, effectively eliminating the powder leakage phenomenon, and ensuring the requirement of the clean environment on the site.

[0019] 4. The utility model discloses that the motor rotating speed control is realized to the frequency conversion control technology, realizes the accurate control of the limestone powder blanking speed, makes the controllability of the continuous blanking uniform speed, and eliminates the phenomenon that the blanking amount and the water inflow do not match. DRAWINGS

[0020] Figure 1 It is a structure schematic drawing of the star type blanking machine;

[0021] Figure 2 It is a structure schematic drawing of the spiral conveying elbow pipe blanking device provided by the utility model embodiment 1;

[0022] Figure 3 It is Figure 2 the sectional view;

[0023] Figure 4The utility model discloses a structure schematic diagram of driving shaft of spiral conveying elbow pipe blanking device of embodiment 1 provides,

[0024] Figure 5 The utility model discloses a structure schematic diagram of spiral conveying elbow pipe blanking device of embodiment 2 provides.

[0025] Figure : 1, pipe body one, 101, flange plate two, 102, feed bin, 103, connecting flange, 2, pipe body two, 201, flange plate one, 3, spiral propeller, 301, spiral blade one, 302, motor, 303, speed reducer, 304, drive shaft, 305, sealing sleeve, 306, spiral blade two, 4, bolt, 5, powder bin, 6, size mixing jar. DETAILED DESCRIPTION

[0026] In order to facilitate understanding of the utility model, the utility model will be described more comprehensively in combination with specific embodiments below. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0028] Reference Figure 2 , Figure 3 The embodiment provides a spiral conveying elbow pipe blanking device, which comprises a conveying pipe and a spiral propeller 3.

[0029] The conveying pipe has pipe body one 1 and pipe body two 2 which are different shafts and are communicated with each other. The pipe body one 1 is a straight pipe, and the top of the pipe body one 1 is provided with a feed bin 102, and the top of the feed bin 102 is open to form a feeding port. The connecting flange 103 is integrally formed at the top edge of the feed bin 102, and the connecting flange 103 is connected with the discharge port of the limestone powder bin 5. The pipe body two 2 is a semicircular elbow pipe, and the end of the pipe body two 2 away from the pipe body one 1 is downwardly formed with a discharge port, and the discharge port is connected with the feeding port of the size mixing jar 6. In order to facilitate the connection of the pipe body one 1 and the pipe body two 2, the end of the pipe body two 2 is provided with a flange plate one 201, and the end of the pipe body one 1 is provided with a flange plate two 101, the flange plate one 201 is attached to the flange plate two 101, and the flange plate one 201 and the flange plate two 101 are connected in a sealing fit through a plurality of bolts 4.

[0030] The screw propeller 3 comprises a motor 302, a speed reducer 303, a driving shaft 304 and a screw blade 301. The speed reducer 303 is connected with the pipe body 1 through a sealing sleeve 305, the motor 302 is in transmission connection with the speed reducer 303, the driving shaft 304 is coaxially arranged with the pipe body 1, one end of the driving shaft 304 is in transmission connection with the speed reducer 303 and the other end thereof extends into the sealing sleeve 305 and the pipe body 1 in sequence and the distal end thereof extends into the pipe body 2, and the screw blade 301 is arranged in the pipe body 1 and is screw-mounted on the pipe body 1. Figure 4 A screw blade 306 is arranged outside the section of the driving shaft 304 located in the sealing sleeve 305.

[0031] Through the above structure, in working, the limestone powder in the limestone powder bin enters into the conveying pipe from the feeding bin 102, the limestone powder is always conveyed in one direction under the action of the thrust of the screw blade 301 and the mutual extrusion of the powder materials under the influence of the resistance of the elbow pipe, the limestone powder fills the whole cavity of the conveying pipe, so that the limestone powder bin 5 at the upper end of the discharging device and the mixing tank 6 at the lower end are completely sealed and isolated, there is no air leakage gap and cavity, so that the effect of preventing the water vapor from rising is achieved, the water vapor is prevented from entering the powder bin, the phenomenon of gypsum agglomeration caused by the combination of limestone powder and water vapor is completely eliminated, the discharging function is stable and reliable, the limestone powder mixing process is stably operated, the phenomenon of material agglomeration which causes the normal discharging to be unable to be realized is eliminated, the safety hidden danger is eliminated, the maintenance and repair intensity is reduced, the economic benefit of the enterprise is improved, and the on-site environment and the safety production are of great significance.

[0032] In the embodiment, the distal end of the screw blade 301 is in a non-contact suspended state in the pipe body 2, the end of the speed reducer 303 of the screw propeller 3 is designed with the sealing sleeve 305, the limestone powder material is continuously conveyed to the distal end of the screw blade 301 by the screw blade 301, the limestone powder material is always conveyed in one direction, the material will not enter into the sealing sleeve 305, the sealing sleeve 305 is not in contact with the material and will not affect the sealing performance, further, the screw blade 306 is arranged outside the section of the driving shaft 304 located in the sealing sleeve 305, the limestone powder material is further prevented from affecting the sealing of the shaft end, the phenomenon of powder leakage is effectively eliminated, and the clean on-site environment is ensured.

[0033] In the embodiment, the motor 302 is a variable frequency motor, the variable frequency control technology is adopted to control the rotating speed of the motor 302, the discharging speed of the limestone powder is controlled, the discharging speed is controllable, and the phenomenon that the discharging amount and the water amount are not matched is eliminated.

[0034] Embodiment 2

[0035] The embodiment and the embodiment 1 adopt the same implementation mode, and the difference between the embodiment and the embodiment 1 is that the screw blade 301 is arranged in the pipe body 1 and is screw-mounted on the pipe body 1. Figure 5The pipe body two 2 is a 90-degree elbow pipe in this embodiment. In this embodiment, since the 90-degree elbow pipe is used, the inlet and outlet of the blanking device are not coaxial, the discharge port of the blanking device cannot be directly connected with the inlet of the lower pulp mixing tank, and the inlet of the pulp mixing tank needs to be re-set to be connected with the pipe body two 2.

[0036] It should be noted that the spiral conveying elbow pipe blanking device provided in this embodiment is not only suitable for limestone powder pulping and blanking, but also can be used in coal powder, coal ash, ash, wheat flour, corn flour, rice flour, feed, cement, iron powder, aluminum powder and other preparation equipment, and can completely overcome the sealing wear defect of the star type blanking machine (air lock), completely meet the sealing requirement of the pipeline for the fan negative pressure powder conveying process, has no gap leakage gap, no powder pollution leakage and no air leakage pressure loss.

[0037] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the range disclosed in the specification.

[0038] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A spiral conveyor elbow blanking device characterized by, It includes conveying pipe and screw propeller (3), conveying pipe includes pipe body one (1), pipe body two (2), pipe body one (1) top is provided with feed inlet, pipe body two (2) is elbow pipe and its one end away from pipe body one (1) forms discharge port;Screw propeller (3) is installed on conveying pipe, screw propeller (3) spiral blade one (301) is located in pipe body one (1) and its end extends into pipe body two (2).

2. The spiral conveyor elbow blanking device of claim 1, wherein, Pipe body one (1) is straight pipe, and pipe body two (2) is semicircular elbow pipe or 90-degree elbow pipe.

3. The spiral conveyor elbow blanking apparatus of claim 1, wherein, One end of pipe body two (2) is provided with flange plate one (201), one end of pipe body one (1) is provided with flange plate two (101), flange plate one and flange plate two (101) are attached, and flange plate one (201) and flange plate two (101) are connected by a plurality of bolts (4) in sealing fit.

4. The spiral conveyor elbow blanking apparatus of claim 1, wherein, The top of pipe body one (1) is provided with feed bin (102), and the top of feed bin (102) is open to form the feed inlet.

5. The spiral conveyor elbow blanking apparatus of claim 4, wherein, The top edge of feed bin (102) is integrally formed with connecting flange (103).

6. The spiral conveyor elbow blank of claim 1, wherein, Screw propeller (3) includes motor (302), speed reducer (303), drive shaft (304) and spiral blade one (301), motor (302) is in transmission connection with speed reducer (303), drive shaft (304) is coaxially arranged with pipe body one (1), one end of drive shaft (304) is in transmission connection with speed reducer (303) and the other end thereof extends into pipe body one (1), spiral blade one (301) is arranged in pipe body one (1) and is spirally installed on drive shaft (304).

7. The spiral conveyor elbow blank of claim 6, wherein, Speed reducer (303) is connected with pipe body one (1) through sealing sleeve (305), sealing sleeve (305) is in communication with the inside of pipe body one (1) and the pipe diameter thereof is smaller than the pipe diameter of pipe body one (1), and the outer portion of the section of drive shaft (304) located in sealing sleeve (305) is provided with spiral blade two (306).

8. The spiral conveyor elbow blanking apparatus of claim 6, wherein, Motor (302) is a variable frequency motor.

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