CN114013849B

CN114013849B - Arch breaking device

Info

Publication number: CN114013849B
Application number: CN202111346400.4A
Authority: CN
Inventors: 楚世赟; 谢小鹏
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-12
Anticipated expiration: 2041-11-15
Also published as: CN114013849A

Abstract

The invention relates to an arch breaking device which comprises a storage bin, wherein a powder conveying device and a first air injection pipe are arranged in the storage bin, the first air injection pipe is arranged on one side of the powder conveying device, the first air injection pipe is connected with a first air source, and a plurality of air injection holes are formed in the first air injection pipe at intervals along the extension direction of the first air injection pipe; the plurality of air injection holes respectively correspond to the powder conveying device and are used for injecting compressed air flow to the powder conveying device. First air supply carries compressed gas to first fumarole, and compressed gas plays loose powder's effect from the fumarole blowout of first fumarole in the feed bin to when compressed gas sprays on powder conveyor, can prevent that closely knit powder material from piling up at powder conveyor and influencing the powder and carrying excessively. Can produce the destruction effect to whole arching part in the feed bin, can not form the hole in the feed bin inside, the fluctuation of lower powder volume is less, is favorable to powder conveyor to normally send the powder.

Description

Arch breaking device

Technical Field

The invention relates to the technical field of quantitative powder conveying, in particular to an arch breaking device.

Background

In carrying out the transportation and production of the powder, the powder conveying device is a device which needs to be widely used.

However, when a powder material having cohesiveness is conveyed, the flowability of the powder material is poor, and the powder material is likely to form an arch inside equipment, which affects normal production, so that an arch breaking device needs to be added.

The existing arch breaking device mainly adopts the modes of mechanical arch breaking, vibration arch breaking, pneumatic arch breaking and the like. Wherein, the pneumatic broken arch is at the feed bin lateral wall reservation compressed air nozzle, utilizes compressed air's injection messenger to become the region of encircleing and sinks, but when powder material weight is great, can only destroy the nozzle around the arch bridge that local area played, still can make the inside hole that forms of feed bin after jetting many times, not only can't break the arch this moment still can lead to the powder fluctuation great down, leads to unable assurance powder conveyor's normal powder of sending.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to: the arch breaking device can break the whole arch-breaking part, does not form holes in the storage bin, has small fluctuation of powder discharge amount, and is favorable for normal powder feeding of the powder conveying device.

In order to achieve the purpose, the invention adopts the following technical scheme:

an arch breaking device comprises a storage bin, wherein a powder conveying device and a first air injection pipe are arranged in the storage bin, the first air injection pipe is arranged on one side of the powder conveying device, the first air injection pipe is connected with a first air source, and a plurality of air injection holes are formed in the first air injection pipe at intervals along the extending direction of the first air injection pipe; the plurality of air injection holes respectively correspond to the powder conveying device and are used for injecting compressed air flow to the powder conveying device.

Further, the feed bin lateral wall is equipped with rotary joint, and rotary joint connects respectively in first jet-propelled pipe and first air supply, and first jet-propelled pipe rigid coupling has rotary device, and rotary device is used for ordering about first jet-propelled pipe rotation in a circumferential direction.

Further, rotary device is the jet-propelled pipe of second, and the jet-propelled pipe of second cup joints outside first jet-propelled pipe, and the jet-propelled hole of first jet-propelled pipe outwards extends to the jet-propelled pipe outer wall of second, and the jet-propelled pipe of second is equipped with rotatory blowback gas wheel, and rotatory blowback gas wheel is equipped with the slant venthole, and the slant venthole is connected with the second air supply, and rotary joint is double-barrelled combined type rotary joint, and double-barrelled combined type rotary joint connects respectively in first jet-propelled pipe and second jet-propelled pipe.

Further, the gas pressure of the second gas source is greater than the gas pressure of the first gas source.

Furthermore, each rotary back-blowing gas wheel is provided with two oblique air outlets, the air outlet directions of the two oblique air outlets are opposite, and the two oblique air outlets are symmetrically arranged on two sides of the rotary back-blowing gas wheel.

Furthermore, the extending direction of the oblique air outlet hole is tangent to the circumferential surface of the rotary back blowing wheel.

Furthermore, a plurality of rotary back-blowing air wheels are arranged, and the plurality of rotary back-blowing air wheels are arranged on the second air injection pipe at intervals.

Further, the diameters of the adjacent rotary back-blowing air wheels are different.

Furthermore, a plurality of hollow supports are arranged between the rotary back-blowing gas wheel and the second gas injection pipe, and the hollow supports are respectively communicated with the rotary back-blowing gas wheel and the second gas injection pipe.

Furthermore, the tail end of the second gas injection pipe is provided with a discharge hole.

In summary, the present invention has the following advantages:

first air supply carries compressed gas to first fumarole, and compressed gas plays loose powder's effect from the fumarole blowout of first fumarole in the feed bin to when compressed gas sprays on powder conveyor, can prevent that closely knit powder material from piling up at powder conveyor and influencing the powder and carrying excessively. Can produce the destruction effect to whole arching part in the feed bin, can not form the hole in the feed bin inside, the fluctuation of lower powder volume is less, is favorable to powder conveyor to normally send the powder.

Drawings

Fig. 1 is a schematic perspective view of the present embodiment.

Fig. 2 is a schematic top view of the present embodiment.

Fig. 3 is a schematic view of fig. 2D-D.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is a schematic view of E-E of fig. 3.

Fig. 6 is a perspective view of a double-tube parallel tube.

Fig. 7 is a schematic perspective view of a dual-tube parallel tube from another perspective.

Reference numerals:

1-a first gas injection pipe, 11-a gas injection hole, 12-a connecting small pipe;

2-a second gas injection pipe, 21-a rotary back-blowing gas wheel, 22-an oblique gas outlet hole, 23-a hollow bracket, 24-a discharge hole and 25-a circular support seat;

3-a storage bin, 31-a bearing, 32-a bearing seat, 33-a motor mounting plate, 34-a material level sensor mounting hole and 35-a powder outlet;

4-screw cylinder.

Detailed Description

The present invention will be described in further detail below.

As shown in fig. 1-4, an arch breaking device comprises a storage bin 3, a screw and a first gas injection pipe 1 are arranged in the storage bin 3, the first gas injection pipe 1 is arranged on one side of a powder conveying device, the first gas injection pipe 1 is connected with a first gas source, and a plurality of gas injection holes 11 are arranged at intervals on the first gas injection pipe 1 along the extending direction of the first gas injection pipe 1; the plurality of gas ejection holes 11 correspond to the powder conveying device, respectively, and eject the compressed air flow to the powder conveying device.

Specifically, 3 upper ends in feed bin are equipped with the opening to be connected with powder storage device, 3 lower extremes in feed bin are equipped with out powder mouth 35. The powder conveying device is preferably a screw, and the bottom of the silo 3 is provided with a screw barrel for installing a screw (not shown in the figure) to convey the powder. The motor mounting hole position and the motor mounting plate 33 are arranged at one end of the storage bin 3 and used for mounting a motor to drive the screw to rotate, the other end of the storage bin is provided with a supporting bearing seat 32 and a threaded hole, a bearing 31 is arranged in the bearing seat 32, a supporting structure is reserved at the bottom of the storage bin 3 so as to mount other auxiliary powder discharging devices, and a mounting hole position of an arch breaking structure is reserved in the middle of the storage bin 3.

During operation, powder is filled in the bin 3, the powder flows downwards into the screw cylinder, and the screw in the screw cylinder conveys the powder in the bin 3 in a rotating mode and discharges the powder from the powder outlet 35. The first gas injection pipe 1 penetrates the whole silo 3 and is preferably arranged above the screw. First air supply carries compressed gas to first jet-propelled pipe 1, and compressed gas plays loose powder's effect from the fumarole 11 blowout of first jet-propelled pipe 1 in feed bin 3 to when compressed gas sprays the rotatory screw rod on, can prevent that closely knit powder material from piling up excessively and influencing the powder and carrying between the thread of screw rod. Because first fumarole 1 interval is equipped with a plurality of fumaroles 11, a plurality of fumaroles 11 correspond with powder conveyor respectively, consequently can be to whole arching part production destruction effect in feed bin 3, can not be in the inside formation hole of feed bin 3, and lower powder fluctuation is less, is favorable to powder conveyor to normally send powder.

3 lateral walls of feed bin are equipped with rotary joint, and rotary joint connects respectively in first jet-propelled pipe 1 and first air supply, and 1 rigid coupling of first jet-propelled pipe has rotary device, and rotary device is used for ordering about 1 circumferential direction of first jet-propelled pipe.

Through the first jet-propelled pipe 1 of rotary device drive peripheral rotation in feed bin 3, increased the effect scope of loose powder in feed bin 3, the effect of mechanical stirring and mediation is played in the rotation of first jet-propelled pipe 1 simultaneously, makes the powder material be in the better state of mobility in feed bin 3 always, has strengthened the broken effect of encircleing.

As shown in fig. 6, fig. 7, rotary device is second jet pipe 2, second jet pipe 2 cup joints outside first jet pipe 1, the fumarole 11 of first jet pipe 1 outwards extends to second jet pipe 2 outer wall through connecting tubule 12, second jet pipe 2 is equipped with rotatory blowback gas wheel 21, rotatory blowback gas wheel 21 is equipped with slant venthole 22, slant venthole 22 is connected with the second air supply, rotary joint is double-barrelled combined type rotary joint, double-barrelled combined type rotary joint connects respectively in first jet pipe 1 and second jet pipe 2.

After the compressed gas supplied by the second gas source is discharged from the inclined gas outlet 22 of the rotary back-blowing gas wheel 21, a thrust is generated on the second gas jet pipe 2, so that the second gas jet pipe 2 makes circumferential rotation motion, and further the first gas jet pipe 1 is driven to make coaxial circumferential rotation motion. The rotary back-blowing gas wheel 21 is sleeved outside the second gas jet pipe 2 and protrudes out of the outer wall of the second gas jet pipe 2, so that better mechanical stirring and dredging effects can be achieved on the powder during circumferential rotation. The double-tube composite rotary joint has the effect that the two air injection tubes are respectively and independently provided with compressed air sources, so that one end of the double-tube composite rotary joint is respectively connected with the two compressed air sources, and the other end of the double-tube composite rotary joint is respectively connected with the two air injection tubes. When the first gas injection pipe 1 and the second gas injection pipe 2 do circumferential rotation motion, the double-pipe composite type rotary joint can ensure that the connection of the first gas source and the second gas source with the double-pipe composite type rotary joint cannot be influenced.

The gas pressure of second air supply is greater than the gas pressure of first air supply for quick circumference rotary motion can be done to first gas-jet pipe 1 and second gas-jet pipe 2, has strengthened broken the effect of encircleing.

Every rotatory blowback wheel 21 is equipped with two slant ventholes 22, and two slant ventholes 22's the opposite direction of giving vent to anger, and rotatory blowback wheel 21 both sides are located to two slant ventholes 22 symmetries, and the structure is more balanced for first jet-propelled pipe 1 and second jet-propelled pipe 2 are steady circumferential direction rotary motion, are difficult to produce and rock, have prolonged the life of device.

The extension direction of the oblique air outlet 22 is tangent to the circumferential surface of the rotary back blowing wheel 21, and the maximum reverse thrust can be generated, so that the first air injection pipe 1 and the second air injection pipe 2 rotate at a higher speed, and the arch breaking effect is enhanced.

The rotary back-blowing air wheels 21 are arranged in a plurality of numbers, the second air injection pipe 2 is arranged at intervals of the rotary back-blowing air wheels 21, the rotating speed of the first air injection pipe 1 and the rotating speed of the second air injection pipe 2 are accelerated, meanwhile, the stress is balanced, and the service life is prolonged.

The adjacent rotary back-blowing air wheels 21 have different diameters, generate blowing forces with different sizes for powder at different positions in the storage bin 3, can effectively destroy the integral stress of the powder, and destroy the integrity of the powder, thereby enhancing the arch breaking effect.

A plurality of hollow brackets 23 are arranged between the rotary back blowing air wheel 21 and the second gas injection pipe 2, and the hollow brackets 23 are respectively communicated with the rotary back blowing air wheel 21 and the second gas injection pipe 2. The hollow support 23 not only has the function of conveying the compressed gas of the second gas injection pipe 2 to the rotary back blowing gas wheel 21, but also can generate better mechanical stirring and dredging functions on the powder during rotation.

As shown in fig. 5, a circular ring support base 25 is disposed at the tail end of the second gas injection pipe 2, and the circular ring support base 25 plays a role of supporting the second gas injection pipe. Because the second jet pipe 2 buries in the powder of feed bin 3, ring supporting seat 25 is equipped with decurrent opening, can avoid long-time after the use powder pile up inside the ring supporting seat and lead to the second jet pipe 2 to rotate the difficulty.

The second gas lance 2 is provided with a discharge opening 24 at its end. If powder enters the first gas nozzle 1 from the gas injection hole 11, the powder can be discharged from the discharge hole 24 at the tail end of the second gas nozzle 2 after rotation, and blockage is prevented.

The side wall of the storage bin 3 is provided with a material level sensor mounting hole 34 for detecting the filling height of the powder in the storage bin 3.

In the prior art, an additional mechanical arch breaking structure needs to be added in the mechanical arch breaking device, namely, a stirrer or a dredging device is added in the mechanical arch breaking device to ensure that powder materials in a storage bin 3 are always in a good flowing state, but a speed reducer needs to be added in the device, and the equipment cost is increased more. The vibration arch breaking utilizes the vibrator to destroy the stress state in the material and activate the material, but the material is more vibrated and more solid, and the normal powder discharging is difficult. The compressed air nozzle is reserved on the side wall of the bin 3 in a pneumatic arch breaking mode, the arch forming area is sunk by utilizing the injection of compressed air, when the weight of powder materials is large, an arch bridge formed in a local area around the nozzle can only be damaged, holes are formed in the bin 3 after multiple times of injection, and at the moment, the arch can not be broken and the fluctuation of the powder amount is large.

Mechanical stirring device to appear in the present broken technique of encircleing is with high costs, the vibration makes the powder closely knit, pneumatic broken arch can only act on technical problem such as local, this embodiment has provided a broken device of encircleing of double-barrelled parallel tube rotation type, stretch into in the feed bin 3 with double-barrelled parallel tube (including first jet-propelled pipe 1 and second jet-propelled pipe 2), it sprays to go out the regional compressed air that uses of powder in the feed bin 3 specially, play loose powder with this and get an effect, simultaneously because double-barrelled reverse blow swiveling wheel that is provided with, the reaction force when the air current is spun from the swiveling wheel can make double-barrelled parallel tube rotatory, can play the stirring effect, strengthen the effect that the powder arch bridge destroyed, mechanical stirring device's advantage has been combined, need not increase the reduction gear alone again, and production cost is reduced. The damage effect on the whole arching area can be generated, particularly, compressed air can be directly injected into each pitch of the screw rod in the screw rod barrel, dust adhered to the surface of the screw rod can be removed, holes cannot be formed in the bin 3, and the fluctuation of powder discharging amount is small; meanwhile, the discharge hole 24 is specially arranged at the tail end of the double-tube parallel tube, so that the phenomenon of powder accumulation in the tube is avoided, and the normal powder feeding of the screw conveying device is further ensured.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. An arch breaking device is characterized in that: the powder conveying device and the first gas injection pipe are arranged in the storage bin, the first gas injection pipe is arranged on one side of the powder conveying device, the first gas injection pipe is connected with a first gas source, and a plurality of gas injection holes are formed in the first gas injection pipe at intervals along the extending direction of the first gas injection pipe; the plurality of air injection holes respectively correspond to the powder conveying device and are used for injecting compressed air flow to the powder conveying device;

the side wall of the storage bin is provided with a rotary joint, the rotary joint is respectively connected with a first gas injection pipe and a first gas source, the first gas injection pipe is fixedly connected with a rotary device, and the rotary device is used for driving the first gas injection pipe to rotate circumferentially;

the rotary device is a second jet pipe, the second jet pipe is sleeved outside the first jet pipe, a jet hole of the first jet pipe extends outwards to the outer wall of the second jet pipe, the second jet pipe is provided with a rotary back blowing turbine, the rotary back blowing turbine is provided with an oblique air outlet hole, the oblique air outlet hole is connected with a second air source, the rotary joint is a double-pipe combined type rotary joint, and the double-pipe combined type rotary joint is connected to the first jet pipe and the second jet pipe respectively.

2. An arch breaking apparatus according to claim 1, wherein: the gas pressure of the second gas source is greater than the gas pressure of the first gas source.

3. An arch breaking apparatus according to claim 1, wherein: each rotary back-blowing gas wheel is provided with two oblique air outlets, the air outlet directions of the two oblique air outlets are opposite, and the two oblique air outlets are symmetrically arranged on two sides of the rotary back-blowing gas wheel.

4. An arch breaking apparatus according to claim 3, wherein: the extending direction of the oblique air outlet hole is tangent to the circumferential surface of the rotary back blowing wheel.

5. An arch breaking apparatus according to claim 3, wherein: the rotary back-blowing air wheels are arranged in a plurality, and the plurality of rotary back-blowing air wheels are arranged on the second air injection pipe at intervals.

6. An arch breaking apparatus according to claim 5, wherein: the diameters of the adjacent rotary back blowing air wheels are different.

7. An arch breaking apparatus according to claim 3, wherein: and a plurality of hollow supports are arranged between the rotary back blowing wheel and the second gas injection pipe, and the hollow supports are respectively communicated with the rotary back blowing wheel and the second gas injection pipe.

8. An arch breaking device according to claim 1, wherein: the tail end of the second gas injection pipe is provided with a discharge hole.