CN110124429B

CN110124429B - Powder collecting barrel

Info

Publication number: CN110124429B
Application number: CN201910424837.1A
Authority: CN
Inventors: 殷柳; 魏忠诚
Original assignee: Sichuan Hongbo New Materials Polytron Technologies Inc
Current assignee: Sichuan Hongbo New Materials Polytron Technologies Inc
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2022-02-08
Anticipated expiration: 2039-05-21
Also published as: CN110124429A

Abstract

The invention discloses a powder collecting barrel, which solves the problems that the existing powder collecting system has poor grading precision and is difficult to effectively collect ultrafine powder below sub-nanometer level. The powder collecting barrel adopting the structure can realize grading collection of specific particle sizes, does not need a filter screen and a back flushing system, and is suitable for systems needing closed circulation or protective gas.

Description

Powder collecting barrel

Technical Field

The invention belongs to a powder collecting device, and particularly relates to a powder collecting barrel.

Background

At present, the powder grading collection mode mainly comprises physical sedimentation, cyclone separation, cloth bag collection, filter screen collection and the like. The physical sedimentation is to carry powder through airflow, large particles moving along with the airflow are firstly sedimented and small particles are secondly sedimented under the action of gravity, and then the classified collection of the powder is realized, but the method has very limited classification precision on the powder and only can sort out larger particles; cyclone collection is to make use of cyclone airflow formed in an airflow cyclone collector, and make large particles settled and small particles enter a next-stage collection device along with ascending airflow at the center of cyclone by virtue of centrifugal force, and a cyclone classification device can distinguish fine powder which cannot be distinguished by physical settlement, but the accuracy of cyclone classification collection is mostly controlled in micron order, and classification and collection of ultrafine powder cannot be realized; the sack is collected and the filter screen is collected and is utilized the network structure that polymer fiber material self formed as hierarchical collection device, according to the different particle diameters of powder, utilize the material of different mesh diameters, and then reach the purpose of hierarchical collection, but because the mesh can be blockked up to the dust, consequently need the blowback system, still regularly change filter screen material, present filter screen material is not ideal to the collection effect of superfine powder moreover, the collection limit is at the submicron level, and the grading effect is not good, use cost is higher.

Disclosure of Invention

The invention provides a powder collecting barrel, aiming at the problems that the existing powder collecting system is poor in grading precision and difficult to effectively collect superfine powder below sub-nanometer level. Form sandwich structure in the collecting vessel through adding the inner tube, add the blade that produces the vortex air current in inner tube top, under the drive of buncher, form different vortex air currents according to the shape and the rotational speed of blade, because the restriction of inner tube structure and shape, will make the air current district and the quiescent zone of vortex form in the collecting vessel, the powder inlet pipe passes the quiescent zone and gets into vortex air current district, under the drive of air current, contain the dust air current and contract into rotatory gas column, the large granule is because centrifugal force's effect collides at the inner tube inner wall of collecting vessel, then fall into the collection tank along the inner wall, the tiny particle spirals downstream along with the air current. The particle size of the collected particles can be selected by adjusting the rotating speed of the motor, the blade structure and the size parameters of the inner barrel of the collecting barrel.

In order to achieve the purpose, the invention is mainly realized by the following technical scheme:

the utility model provides a powder collecting barrel, includes urceolus, the powder collecting tank of being connected with the urceolus discharge gate, carries out the confined apron to the urceolus top, urceolus one side is connected with the inlet pipe, and the opposite side is connected with out tuber pipe, its characterized in that coaxial being provided with in the urceolus forms sandwich structure's inner tube with the urceolus, inner tube and inlet pipe intercommunication, the inside of inner tube is provided with the blading, the blading includes at least two-stage blade, the apron top is provided with the motor, the sealing member of being connected with the transmission of motor power take off end, the sealing member extends to inner tube and blading fixed connection, it is connected with the subassembly of bleeding to set up between urceolus discharge gate and the powder collecting tank.

In the technical scheme, the inner cylinder comprises an upper straight pipe, a cone and a lower straight pipe which are sequentially connected and sealed, and the pipe diameter of the upper straight pipe is larger than that of the lower straight pipe.

In the technical scheme, the blade group is arranged at the top in the upper straight pipe, and the feeding pipe is communicated with the upper straight pipe through the feeding pipe joint.

In the technical scheme, the blades of each stage are arranged in a vertically staggered mode.

In the above technical scheme, the fan blade of each stage of blade and the fan blade of the adjacent stage of blade are arranged at equal intervals.

In the above technical solution, the motor is a speed-adjustable motor.

In the above technical solution, the sealing member is a magnetic fluid sealing member.

In the technical scheme, one end of a rotating shaft in the magnetic fluid sealing element is connected with the motor, and the other end of the rotating shaft penetrates through the cover plate and extends to the inner cylinder to be fixedly connected with the blade group.

In the above technical scheme, the discharge port of the outer cylinder is a conical port.

In the technical scheme, the air exhaust component comprises a first-stage sanitary ball valve, a first air exhaust pipe, a second-stage sanitary ball valve and a second air exhaust pipe which are sequentially and hermetically connected, a discharge port of the outer barrel is connected with the first-stage sanitary ball valve, and the powder collecting tank is connected with the second air exhaust pipe.

In summary, due to the adoption of the technical scheme, the invention has the following advantages and beneficial effects:

the powder collecting barrel is novel in design and ingenious in conception, and can be used for grading and collecting powder with different particle sizes, particularly grading and collecting submicron and nanoscale ultrafine powder.

The powder collecting barrel disclosed by the invention has no wearing parts, does not need a filter screen, can avoid the phenomenon that a cloth bag or the filter screen collects a large amount of powder solids and the powder solids are adsorbed by the filter screen, does not need to be provided with a complicated back flushing system, and is suitable for systems needing sealed circulation or protective gas.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the inner barrel structure of the present invention.

Fig. 3 is a schematic top view of the blade assembly of the present invention rotated by the motor.

FIG. 4 is a side view of a blade of one of the stages of the present invention.

Wherein: 1. the device comprises an outer barrel, 2 parts of an inner barrel, 2 parts of 1 parts of an upper straight pipe, 2 parts of a cone, 2 parts of 3 parts of a lower straight pipe, 3 parts of a feeding pipe, 4 parts of an air outlet pipe, 5 parts of a cover plate, 6 parts of a sealing piece, 7 parts of a motor base, 8 parts of a motor, 9 parts of an inner barrel support, 10 parts of a feeding pipe joint, 11 parts of a first-level sanitary ball valve, 12 parts of a second-level sanitary ball valve, 13 parts of a first air exhaust pipe, 14 parts of a second air exhaust pipe, 15 parts of a powder collecting tank, 16 parts of a first-level blade, 17 parts of a second-level blade, 18 parts of an upper bolt hole, 19 parts of a lower bolt hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, a powder collecting barrel includes an outer barrel, an inner barrel disposed in the outer barrel and forming a sandwich structure with the outer barrel. The inner cylinder and the outer cylinder are made of stainless steel materials.

The top opening of urceolus seals through the apron, and the apron is connected with the urceolus through the ring flange, seals with O type circle. One side welding of urceolus has the inlet pipe that extends to in the urceolus, and the inlet pipe passes through inlet pipe connector and inner tube intercommunication, and the inlet pipe connector can be soft joint (hose adds the staple bolt) or hard joint (clamp). The other side of the outer barrel is welded with an air outlet pipe. The discharge gate and the powder collecting tank intercommunication of urceolus, for making things convenient for the powder granule landing to advance the powder collecting tank, the discharge gate adopts centrum structure, and the centrum structure passes through the ring flange to be connected with the urceolus, and is sealed through O type circle.

The outer barrel discharge port and the powder collecting tank are connected with an air exhaust assembly, the air exhaust assembly comprises an one-level sanitary ball valve, a first exhaust pipe, a second-level sanitary ball valve and a second exhaust pipe which are connected in sequence through a clamp, and the clamp is sealed through a silica gel pad. First exhaust tube and second exhaust tube have the little ball valve that connects the trachea, and the discharge gate is connected with one-level ball valve, and the powder collecting tank is connected with the second exhaust tube.

A motor base and a speed-adjustable motor are arranged above the outer barrel, the motor base is fixed on the collecting barrel cover plate through screws, and the motor is fixed on the motor base through screws.

As shown in figure 2, the inner cylinder is of a three-level structure and comprises an upper straight pipe, a cone and a lower straight pipe which are welded and sealed in sequence, and the inner cylinder is arranged in the outer cylinder through an inner cylinder bracket and is connected and fixed through a bolt. Go up straight tube internal top position and be provided with the blade group, the blade group is multi-stage structure, including at least two-stage blade, and the progression of blade can be adjusted as required. The type of blade may be one of axial flow, centrifugal, mixed flow, scroll. As shown in fig. 3, the axial flow type blades are adopted, the blade group can select two-stage blades, the blades in the two-stage blades are installed in a staggered mode with equal gaps from top to bottom, the first-stage blade is located above the second-stage blade, and the diameter of the blade of the first-stage blade is larger than that of the blade of the second-stage blade. The primary blades mainly generate downward spiral thrust, and the secondary blades mainly generate vortex airflow.

The motor power output end is provided with a sealing element, one end of a rotating shaft in the sealing element is in transmission connection with the motor, the other end of the rotating shaft penetrates through the collecting barrel cover plate to extend into the inner barrel and be fixedly connected with the blade group, the outer barrel is sealed while the power of the motor is transmitted to the inner barrel by the sealing element, and the sealing element can adopt a magnetic fluid sealing element. If the dust collecting barrel does not need to be sealed, the sealing element can be replaced by the thrust bearing. As shown in fig. 4, an upper bolt hole and a lower bolt hole are arranged in the vertical direction of the blade shaft sleeve, the upper bolt hole and the lower bolt hole penetrate through the shaft sleeve in the horizontal direction, corresponding bolt holes are arranged in the rotating shaft of the sealing element, and the blade and the sealing element are fixedly connected through bolts, so that the center of the blade is ensured to coincide with the center of gravity of the sealing element.

When the motor works, the inner cylinder provides fixed boundary conditions for airflow generated by the blades, the effect of a duct is achieved, and the granularity and the quality of collected dust can be controlled by adjusting the size parameters of the inner cylinder. Let a be the height of the upper straight tube of the inner tube, b be the diameter of the upper straight tube of the inner tube, c be the height of the cone of the inner tube, d be the diameter of the lower straight tube of the inner tube, and e be the height of the lower straight tube of the inner tube. The larger the value of a is, the larger the collision probability among the dust is, the longer the coarse powder centrifugation time is, and the collection of large particles is facilitated; the smaller the value of d is, the larger the value of c is, the collision between the aggregate and the cylinder wall is reduced, and the grading precision is increased; the larger the value of e is, the longer the residence time of the finely divided aggregate at the tail part of the vortex airflow is, the more the finely divided aggregate is beneficial to growing, and then the low-density ultrafine powder is collected.

The working process of the powder collecting barrel comprises the following steps: under the drive of a motor, the multistage blades rotate at high speed, vortex airflow is formed in the inner barrel, a vortex airflow area is formed in the inner barrel, an interlayer between the outer barrel of the collecting barrel and the inner barrel of the collecting barrel is a static area, airflow containing powder enters the vortex airflow area from the feeding pipe under the action of an external circulating fan, the distance from the central line of the feeding pipe to the first-stage blade is larger than the diameter of the feeding pipe but is close to the first-stage blade as much as possible, the airflow containing dust enters the vortex airflow area under the drive of the vortex airflow formed by the first-stage blade and spirally shrinks downwards to form a rotating air column, large particles collide with the inner wall of the inner barrel under the action of centrifugal force and then fall into the collecting tank along the inner wall, small particles spirally downwards move along with the airflow, the particle size of the collected particles can be selected by adjusting the rotating speed of the motor, the size parameters of the blade structure and the inner barrel of the collecting barrel, and powder which does not need to be collected is sucked into the next-stage collecting barrel by the negative pressure of the air outlet, when the nanoscale ultrafine powder is prepared, the powder-containing airflow enters a vortex airflow area to form a rotary air column, the nanoscale ultrafine powder collides and aggregates in the air column, after the bottom of the air column is contacted with a conical discharge port of an inner cylinder of a collecting barrel, the peripheral rotation of the vortex airflow is blocked, aggregates in the peripheral airflow collide with the inner wall of the inner cylinder of the collecting barrel and then settle into the collecting barrel due to gravity, fine particles in the center of the vortex airflow move along a lower straight pipe of the inner cylinder of the collecting barrel, after passing through the lower straight pipe of the inner cylinder of the collecting barrel, the airflow is gradually and radially diffused in the downward direction without being constrained by a pipeline, so that the constraint height of the powder is lost, the height of the powder is adjusted according to different particle sizes, airflow density and powder density, the diameter of an air outlet is adjusted, so that the negative pressure formed by a circulating fan at the air outlet is not enough to resist the gravity of the powder aggregates, and the powder without constraint settles along with the gravity in a static area below the air outlet, the clean air flow enters the static area at the air outlet and returns to the circulation system from the air outlet pipe.

When the powder is collected, the first-stage sanitary ball valve and the second-stage sanitary ball valve are closed firstly, then the clamp between the first exhaust pipe and the second-stage sanitary ball valve is loosened, and the second-stage sanitary ball valve, the second exhaust pipe and the powder collecting tank are integrally moved to the packing box. When the collecting tank is installed, if the system needs inert gas or vacuum protection, air in the first air exhaust pipe needs to be pumped out firstly, and then the first-stage sanitary ball valve and the second-stage sanitary ball valve are opened. The powder collecting tank adopts threaded connection, and other parts are all connected by buckles, so that the powder collecting tank is convenient to disassemble.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a powder collecting barrel, includes urceolus, the powder collecting tank of being connected with the urceolus discharge gate, carries out the confined apron to the urceolus top, urceolus one side is connected with the inlet pipe, and the opposite side is connected with out tuber pipe, its characterized in that coaxial being provided with in the urceolus forms sandwich structure's inner tube with the urceolus, inner tube and inlet pipe intercommunication, the inside of inner tube is provided with the blading, the blading includes at least two-stage blade, the apron top is provided with the motor, the sealing member of being connected with the transmission of motor power take off end, the sealing member extends to inner tube and blading fixed connection, it is connected with the subassembly of bleeding to set up between urceolus discharge gate and the powder collecting tank.

2. The powder collecting barrel according to claim 1, wherein the inner barrel comprises an upper straight tube, a cone and a lower straight tube which are sequentially connected and sealed, and the diameter of the upper straight tube is larger than that of the lower straight tube.

3. A powder collector bucket as claimed in claim 2 wherein said vane assembly is located at the top of the upper tube and the feed tube communicates with the upper tube through a feed connection.

4. The powder collecting bucket of claim 1, wherein the blades of each stage are arranged in a vertically staggered manner.

5. The powder collecting bucket of claim 4, wherein the blades of each stage of blades are spaced from the blades of the adjacent stage of blades by equal intervals.

6. The powder collection bin of claim 1, wherein the motor is a variable speed motor.

7. A powder collection bin according to claim 1, wherein the seal is a magnetic fluid seal.

8. The powder collecting barrel according to claim 7, wherein one end of the rotating shaft in the magnetic fluid sealing element is connected with the motor, and the other end of the rotating shaft passes through the cover plate and extends to the inner barrel to be fixedly connected with the blade group.

9. The powder collecting container according to claim 1, wherein the outlet of the outer barrel is a tapered outlet.

10. The powder collecting barrel according to claim 1, wherein the air extracting component comprises a first-stage sanitary ball valve, a first air extracting pipe, a second-stage sanitary ball valve and a second air extracting pipe which are hermetically connected in sequence, a discharge port of the outer barrel is connected with the first-stage sanitary ball valve, and the powder collecting tank is connected with the second air extracting pipe.