Steady flow type powder screw conveyor
By setting up a fluidization chamber and a throttling chamber on the screw conveyor, combining the exhaust pipe and a centrifugal dust collector, the problem of bridge and plate bonding in powder conveying is solved, and the stable conveying of powder and simplified structure is achieved.
Patent Information
- Application Number
- CN202420460372.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The screw conveyor is prone to powder bridges, arches and blockages during powder conveying. The existing solutions are complex and have poor results.
The fluidization chamber and spaced feed and discharge spiral blades are arranged on the conveying pipe to form a throttling chamber and connected to the centrifugal dust collector through the exhaust pipe to discharge excess gas to prevent the powder from forming a rack at the feed port. and dry powder through the fluidized chamber to prevent the plate from being shaved.
Effectively prevent the formation of bridges and plate bonds of powder during the transportation process, maintain stable blanking of powder, simplify the structure and improve the conveying efficiency.
Smart Images
Figure CN222158732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of material handling equipment, in particular to a steady-flow type powder material screw conveyor. Background Art
[0002] When conveying powder, generally use a screw conveyor with good sealing performance to prevent the powder from polluting the environment during the conveying process. The advantage of the screw conveyor is that it can accurately control the falling accuracy of the powder. However, the screw conveyor still has the following defects: 1. Since the screw conveyor is a closed structure, when the powder falls into the screw conveyor from the feed port, the powder will squeeze the air in the screw conveyor, and the squeezed air will cause resistance to the powder at the feed port, causing the powder to form bridges and arches at the feed port; 2. The powder will absorb moisture from the external environment during storage and transportation. When the powder enters the screw conveyor, it will become hardened, affecting the conveying efficiency of the screw conveyor. The powder will even adhere to the inner wall and spiral blades of the screw conveyor, causing the spiral blades and the inner wall to be blocked. For powder material bridging and arching, the design of the feed port is improved, such as increasing the size of the discharge port, designing the feed port into an eccentric tilted structure, etc., to prevent powder material bridging and arching, or adding an arch breaking device at the feed port; for powder material compaction, a vibrator or a blocker is currently provided to prevent powder material from compacting and clogging during transportation. The above structures need to be combined together to solve the defects of the screw conveyor, which not only complicates its structure, but also has poor effects. Utility Model Content
[0003] The utility model aims to provide a steady flow type powder material screw conveyor which can prevent powder material from bridging during feeding, prevent powder material from compacting and blocking during transportation, and ensure stable dropping of powder material.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a steady-flow powder screw conveyor, including: a conveying pipe, a feed port and a discharge port are arranged on the conveying pipe, a rotating shaft is sealed and rotatably arranged in the conveying pipe, the rotating shaft is connected to a reduction motor, a feed spiral blade and a discharge spiral blade are arranged on the rotating shaft at intervals, a throttling chamber is formed in the conveying pipe between the feed spiral blade and the discharge spiral blade, the feed port is located above the feed spiral blade, and a plurality of fluidizing bins are arranged on the pipe wall of the conveying pipe below the feed spiral blade, one of the fluidizing bins is aligned with the feed port in upper and lower directions, the discharge port is located below the discharge spiral blade, an exhaust pipe is arranged on the conveying pipe, and the exhaust pipe is located between the feed port and the throttling chamber.
[0005] Furthermore, in the aforementioned steady flow type powder screw conveyor, the exhaust pipe is connected to the air inlet of the centrifugal dust collector.
[0006] Furthermore, in the aforementioned steady flow type powder screw conveyor, two inspection holes are provided on the conveying pipe, the two inspection holes respectively correspond to the throttling chamber and the discharge port, and an observation window is sealed on the inspection hole.
[0007] Furthermore, in the aforementioned steady flow type powder screw conveyor, a sight glass flange is sealed and connected to the side wall of the fluidizing bin.
[0008] Furthermore, in the aforementioned steady flow type powder screw conveyor, a discharge valve is connected to the bottom flange of the fluidizing bin.
[0009] Furthermore, in the aforementioned steady flow type powder screw conveyor, a mounting seat is respectively provided at both ends of the conveying pipe, a bearing seat is provided on each of the two mounting seats, the reduction motor is located on any one of the mounting seats, the two ends of the rotating shaft are respectively connected to the bearings in the two bearing seats, and the rotating shaft in the bearing seat on the same side of the reduction motor extends out of the bearing seat and is connected to the output shaft on the reduction motor through a coupling.
[0010] Furthermore, in the aforementioned steady flow type powder screw conveyor, a mechanical seal is respectively provided at both ends of the conveying pipe, the mechanical seal is coaxial with the bearing in the bearing seat on the same side, the two ends of the rotating shaft are respectively sealed and connected with the two mechanical seals, and the two ends of the rotating shaft extend out of their respective connected mechanical seals and are connected to the bearing in the bearing seat on the same side.
[0011] The utility model has the advantages that: a plurality of fluidizing bins are arranged at intervals on the conveying pipe, which can fluidize and dry the powder in the conveying pipe, and prevent the powder from being hardened and adhered in the conveying pipe; a feed spiral blade and a discharge spiral blade are arranged at intervals on the rotating shaft, so that a throttling cavity is formed in the conveying pipe between the feed spiral blade and the discharge spiral blade; when the powder in the fluidized state enters the throttling cavity under the conveyance of the feed spiral blade, it will accumulate in the throttling cavity and finally form a material seal, so that the conveying environment of the discharge spiral blade can be stabilized; when the feed spiral blade conveys the powder to the throttling cavity so that the powder in the throttling cavity overflows onto the discharge spiral blade, the discharge spiral blade can stably convey the powder to the discharge port for dropping; an exhaust pipe is arranged on the conveying pipe to discharge excess gas in the conveying pipe, which can prevent the excessive fluidizing gas from destroying the material seal in the throttling cavity, and can also discharge excess gas in the space where the feed spiral blade is located, so as to prevent the powder from forming a bridge at the feed port due to wind resistance. Compared with the original complex structure, the present application only needs to add a fluidizing bin and set feed spiral blades and discharge spiral blades at intervals on the rotating shaft to solve the problems of powder bridging and compaction in the screw conveyor, and can also ensure stable powder falling without being affected by the fluidizing wind. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1It is a structural schematic diagram of the steady-flow powder screw conveyor described in the utility model. DETAILED DESCRIPTION
[0013] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.
[0014] like Figure 1 As shown, the steady flow powder screw conveyor described in the utility model comprises: a conveying pipe 1, a mounting seat 11 is respectively arranged at both ends of the conveying pipe 1, a bearing seat 12 is arranged on each of the two mounting seats 11, a reduction motor 13 is arranged on any one of the mounting seats 11, and a mechanical seal 14 is also respectively arranged at both ends of the conveying pipe 1, the mechanical seal 14 is coaxial with the bearing in the bearing seat 12 on the same side, a rotating shaft 2 is rotatably arranged in the conveying pipe 1, and the two ends of the rotating shaft 2 are respectively sealed and connected with the two mechanical seals 14, so that a sealed rotating structure is formed between the rotating shaft 2 and the conveying pipe 1, and the two ends of the rotating shaft 2 are respectively extended out of the mechanical seals 14 connected to them and connected to the bearing in the bearing seat 12 on the same side, and the rotating shaft 2 in the bearing seat 12 on the same side of the reduction motor 13 is extended out of the bearing seat 12 and connected to the output shaft on the reduction motor 13 through a coupling 15.
[0015] A feed port 16 and a discharge port 17 are provided on the conveying pipe 1, a feed spiral blade 21 and a discharge spiral blade 22 are provided at intervals on the rotating shaft 2, a throttling chamber 3 is formed in the conveying pipe 1 between the feed spiral blade 21 and the discharge spiral blade 22, the feed port 16 is located above the feed spiral blade 21, and a plurality of fluidizing bins 4 are provided at intervals on the pipe wall of the conveying pipe 1 below the feed spiral blade 21, one of the fluidizing bins 4 is aligned with the feed port 16 up and down, the discharge port 17 is located below the discharge spiral blade 22, and a sight glass flange 41 is sealed and connected to the side wall of the fluidizing bin 4, through which the fluidization of the powder in the fluidizing bin 4 can be observed, and the fluidization of the powder in the fluidizing bin 4 can be observed. The bottom flange of the chemical bin 4 is connected with a discharge valve 42. When maintenance or sewage discharge is required, it is only necessary to open the discharge valve 42. An exhaust pipe 5 is arranged on the conveying pipe 1. The exhaust pipe 5 is connected with the air inlet of the centrifugal dust collector 51. The exhaust pipe 5 is located between the feed port 16 and the throttling chamber 3. Two inspection holes are arranged on the conveying pipe 1. The two inspection holes correspond to the throttling chamber 3 and the discharge port 17 respectively. An observation window 18 is sealed on the inspection hole. The accumulation of powder in the throttling chamber 3 and the discharge condition of the discharge port 17 can be intuitively observed through the two observation windows 18. The corresponding throttling chamber 3 or the discharge port 17 can be inspected or cleaned by opening the observation window 18.
[0016] The powder is fed into the conveying pipe 1 from the feed port 16, and the powder will accumulate in the conveying pipe 1. The fluidizing bin 4 generates fluidizing gas to fluidize and dry the powder, and then the reduction motor 13 is started to drive the rotating shaft 2 to rotate. The feed spiral blade 21 on the rotating shaft 2 pushes the powder in a fluidized state into the throttling chamber 3 for accumulation. After the powder is dried by the fluidizing air, it will not be compacted when it is accumulated in the throttling chamber 3. When the powder in the throttling chamber 3 accumulates to a certain extent, a material seal will be formed, isolating the space where the feed spiral blade 21 is located from the space where the discharge spiral blade 22 is located. In this way, only the space where the feed spiral blade 21 is located is affected by the fluidizing gas. However, if the fluidizing gas in the space where the feed spiral blade 21 is located is not discharged in time, the material seal in the throttling chamber 3 and the discharge spiral blade 22 will be destroyed. The material port 16 creates resistance to the powder, causing the powder to form a bridge at the material port 16, affecting the discharge of the powder. In order to prevent the above situation, the centrifugal dust collector 51 is opened and in a normally open state. The centrifugal dust collector 51 extracts and discharges the excess fluidizing gas in the space where the feed spiral blade 22 is located through the exhaust pipe 5, and the space where the discharge spiral blade 22 is located is no longer affected by the fluidizing gas, thereby maintaining the air pressure in the space where the discharge spiral blade 22 is located stable, making the flow of the powder in the space more stable. After the feed spiral blade 21 continuously transports the powder into the throttling chamber 3, the powder in the throttling chamber 3 will overflow in the direction of the discharge spiral blade 22. After the overflowed powder contacts the discharge spiral blade 22, it can be spirally transported, so that the powder can stably fall out of the discharge port 17.
[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. Steady flow powder screw conveyor, including: A conveying pipe is provided with a feed port and a discharge port, a rotating shaft is sealed and rotatably provided in the conveying pipe, and the rotating shaft is connected to a reduction motor. The characteristic is that a feed spiral blade and a discharge spiral blade are arranged at intervals on the rotating shaft, a throttling cavity is formed in the conveying pipe between the feed spiral blade and the discharge spiral blade, the feed port is located above the feed spiral blade, and a plurality of fluidizing bins are arranged at intervals on the pipe wall of the conveying pipe below the feed spiral blade, one of the fluidizing bins is aligned with the feed port in upper and lower directions, and the discharge port is located below the discharge spiral blade. An exhaust pipe is provided on the conveying pipe, and the exhaust pipe is located between the feed port and the throttling cavity.
2. The steady flow type powder screw conveyor according to claim 1, characterized in that: The exhaust pipe is connected to the air inlet of the centrifugal dust collector.
3. The steady flow type powder screw conveyor according to claim 1, characterized in that: Two inspection holes are arranged on the conveying pipe, the two inspection holes correspond to the throttling cavity and the discharge port respectively, and an observation window is sealed on the inspection holes.
4. The steady flow type powder screw conveyor according to claim 1, characterized in that: A sight glass flange is sealed and connected to the side wall of the fluidizing bin.
5. The steady flow type powder screw conveyor according to claim 4, characterized in that: A discharge valve is connected to the bottom flange of the fluidized bin.
6. The steady flow type powder screw conveyor according to any one of claims 1 to 5, characterized in that: A mounting seat is respectively arranged at both ends of the conveying pipe, and a bearing seat is arranged on each of the two mounting seats. The reduction motor is located on any one of the mounting seats, and both ends of the rotating shaft are respectively connected to the bearings in the two bearing seats. The rotating shaft in the bearing seat on the same side of the reduction motor extends out of the bearing seat and is connected to the output shaft on the reduction motor through a coupling.
7. The steady flow type powder screw conveyor according to claim 6, characterized in that: A mechanical seal is provided at each end of the conveying pipe. The mechanical seal is coaxial with the bearing in the bearing seat on the same side. The two ends of the rotating shaft are respectively connected to the two mechanical seals. The two ends of the rotating shaft extend out of their respective connected mechanical seals and are connected to the bearing in the bearing seat on the same side.