Double-helix bidirectional discharging and feeding machine

Abstract

The utility model discloses a double-helix two-way discharging and feeding machine which comprises a workbench, a machine room, a hopper, a spiral conveying shaft, a gear motor and a shaft seat. A machine bin, a gear motor and a shaft seat are fixed to the workbench. The hopper is located over the machine room, and discharging openings are formed in the two ends of the bottom of the machine room. The two ends of the spiral conveying shaft penetrate out of the machine room and are supported by shaft seats; the gear motor is connected with the spiral conveying shaft through a coupler. The spiral conveying shaft comprises a spiral cylinder part and an extension shaft part, and two sections of spiral blades with opposite rotation directions are arranged on the spiral cylinder part; the diameter of spiral blades of the spiral cylinder part is increased from the middle to two ends in a stepped mode. By optimizing the structural design and utilizing the driving principle similar to a turbine impeller, the material conveying device reduces the resistance in the material conveying process, stirs materials, avoids the bridging phenomenon, remarkably improves the material conveying efficiency and stability, reduces the energy consumption and the maintenance cost, and has wide application prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to power plant mixed combustion feeding equipment technical field especially relates to a double helix two -way discharge feeder. BACKGROUND

[0002] In the feeding system of biomass power plant, solid waste power plant and coal power plant mixed combustion, the feeder as one of the key equipment undertakes the important task of uniformly and stably conveying the material to the belt conveyor. The existing screw feeder usually adopts single helix structure and single discharge port design, which has many problems in practical application.

[0003] Firstly, in the material conveying process, due to the rotating action of the helical blade, the material is easily extruded, which leads to the consolidation of the material. This consolidation phenomenon not only increases the conveying power of the screw, but also easily forms congestion at the discharge port, which seriously even causes the interruption of conveying, and further damages the motor equipment, affecting the normal operation of the whole system.

[0004] Secondly, the design of single discharge port limits the discharge speed of the feeder, which makes the material conveying efficiency low and cannot meet the demand of large-scale production. Especially in biomass power plant and solid waste power plant, the types and properties of materials are complex and diverse, and the design of single discharge port is difficult to adapt to the conveying requirements of different materials, which further reduces the overall efficiency of the system. CONTENT OF THE UTILITY MODEL

[0005] Based on the defects existing in the prior art, the purpose of the utility model is to provide a double helix two-way discharge feeder, which can effectively solve the problems of material consolidation, discharge port congestion and low conveying efficiency of the existing single helix single discharge port feeder, thereby improving the stability and efficiency of the system.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] The double helix two-way discharge feeder comprises a workbench, a machine warehouse, a hopper, a spiral conveying shaft, a speed reducer and a shaft seat. The machine warehouse is fixed on the workbench, and the hopper is located directly above the machine warehouse, with its bottom communicating with the inner cavity of the machine warehouse. The bottom of the machine warehouse is provided with discharge ports at both ends. The spiral conveying shaft is provided with two parallel shafts in the machine warehouse, and the two ends of the shafts are supported by the shaft seat. The shaft seat is fixed on the workbench. The speed reducer is provided with two fixed shafts on the workbench, and is connected with the spiral conveying shaft through a shaft coupling. The spiral conveying shaft comprises a spiral cylinder part and an extension shaft part located on both sides of the spiral cylinder part, and two spiral leaves with opposite rotation directions are arranged on the spiral cylinder part for conveying the material in the middle to both ends. The diameter of the spiral leaves of the spiral cylinder part increases step by step from the middle to both ends.

[0008] Further optimization technical scheme, the hopper is inverted four prismatic shape, its front, back panel symmetry setting, its left, right panel asymmetric setting.

[0009] Further optimization technical scheme, the longitudinal section of the bottom panel of the machine warehouse is inverted V-shaped, which makes the inner cavity of the machine warehouse gradually increase from the middle to the two end outlets, and the inclined surface is also more conducive to the conveying of the material to the two ends, reducing the risk of blockage.

[0010] Further optimization technical scheme, the top surface of the machine warehouse is provided with two inspection openings, which are located directly above the two discharge openings; the inspection openings are provided with cover plates.

[0011] Further optimization technical scheme, one side of the workbench is provided with a straight ladder, which is convenient for workers to maintain and repair.

[0012] Further optimization technical scheme, the connection between the machine warehouse and the screw conveying shaft is sealed by a sealing plate.

[0013] Further preferred technical scheme, a plurality of material stirring rods are arranged on the extended shaft portion of the screw conveying shaft.

[0014] Further preferred technical scheme, the screw cylinder portion of the screw conveying shaft extends from the middle to the inside above the discharge opening.

[0015] Further optimization technical scheme, the outer portion of the shaft coupling is provided with a shaft coupling guard.

[0016] Further optimization technical scheme, a ring of outwardly extending wing plates is arranged on the top edge of the hopper, which can prevent material from splashing to the outside and polluting the surrounding working environment.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. Improve the conveying efficiency:

[0019] The double-screw bidirectional discharge design can simultaneously convey materials from two directions, significantly improving the conveying speed and efficiency. This design effectively avoids the congestion phenomenon that may occur in single-screw structures, greatly improves the overall conveying capacity, and meets the needs of large-scale production.

[0020] 2. Prevent material solidification:

[0021] The double-screw structure rotates in opposite directions, causing the material to constantly turn during the conveying process, effectively dispersing the material pressure and reducing the phenomenon of material solidification. This not only avoids the adhesion of materials to the screw blades, but also reduces the maintenance cost of the equipment.

[0022] 3. Optimize material distribution:

[0023] The design of the inverted V-shaped bottom surface of the machine bin enables the material to be naturally divided during the conveying process, avoids accumulation in the middle of the machine bin, and improves the uniformity of the material conveying. The diameter of the spiral blade gradually increases from the middle to both ends, further optimizing the distribution and conveying intensity of the material.

[0024] 4. Reducing energy consumption:

[0025] By utilizing the driving principle similar to the turbine impeller, the resistance during the material conveying process is reduced, the load of the driving motor is reduced, thereby significantly reducing energy consumption and saving operation cost.

[0026] 5. Improving equipment stability:

[0027] The design of the double discharge ports enables the material to be evenly discharged from both ends, reduces the accumulation of the material at the discharge port, improves the stability of the equipment operation, and reduces the equipment failure rate.

[0028] 6. Facilitating maintenance and maintenance:

[0029] The two maintenance openings arranged on the top surface of the machine bin facilitate the equipment inspection and maintenance of the workers, improve the maintainability of the equipment, reduce the part wear, and prolong the service life of the equipment.

[0030] 7. Preventing material splashing:

[0031] The wing plate arranged on the top edge of the hopper effectively prevents the material from splashing out during the conveying process, keeps the working environment clean, and reduces material waste.

[0032] 8. Preventing material congestion:

[0033] The different angle design of the front and rear panels of the hopper and the vertical surface causes the material to flow at different speeds on both sides, one side is faster, and the other side is slower, forming an asymmetric flow channel, promoting the smooth flow of the material, avoiding the accumulation and congestion of the material when entering the machine bin, and ensuring the continuous and stable material conveying.

[0034] In summary, the double-spiral bidirectional discharge feeder provided by the utility model significantly improves the efficiency and stability of material conveying, reduces energy consumption and maintenance cost, and has a broad application prospect. In addition, its environmental protection advantage is also worth attention, and reducing energy consumption helps to reduce carbon emissions, which meets the concept of modern green production. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the front view of the overall structure of the utility model.

[0036] Figure 2 is the right view of the overall structure of the utility model.

[0037] Figure 3 is a top view of the utility model after the hopper and the wing plate are removed.

[0038] In the figure: 1-workbench, 2-machine warehouse, 3-hopper, 4-spiral conveying shaft, 5-reduction motor, 6-shaft base, 7-coupling, 8-wing plate, 9-straight ladder; 21-discharge port, 22-inspection opening; 41-spiral cylinder shaft part, 42-extended shaft part, 43-spiral blade; 71-coupling guard. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0040] The specific embodiments of the double-spiral bidirectional discharging feeder provided by the utility model will be described in detail below by combining with the drawings.

[0041] Embodiment 1: The drawing of this embodiment is a structure diagram of two sets of equipment used side by side.

[0042] As shown in the drawing, Figure 1 this embodiment provides a double-spiral bidirectional discharging feeder, mainly including a workbench 1, a machine warehouse 2, a hopper 3, a spiral conveying shaft 4, a reduction motor 5 and a shaft base 6. The workbench 1 is the supporting foundation of the whole equipment, and the machine warehouse 2, the shaft base 6 and the reduction motor 5 are fixed thereon. The hopper 3 is located above the machine warehouse 2. The spiral conveying shaft 4 is located in the machine warehouse 2, and two are arranged side by side and penetrate through the whole machine warehouse 2. Two reduction motors 5 are arranged, which respectively butt joint and drive two spiral conveying shafts 4.

[0043] The detailed design details of each part structure are introduced as follows:

[0044] Hopper design:

[0045] The hopper 3 in this embodiment adopts an inverted quadrangular pyramid structure, and the design features are that the front and rear panels are symmetrically arranged (as shown in the drawing), Figure 1 and the left and right panels are asymmetrically arranged (as shown in the drawing) Figure 2 . This design of the hopper 3 can promote the flowability of the material and reduce the stagnation of the material in the feeding process, so as to ensure that the feeding process is more smooth. A circle of wing plates 8 extending outward is arranged at the top edge of the hopper 3, and this design effectively prevents the material from splashing to the outside and reduces the pollution of the working environment.

[0046] Machine warehouse design:

[0047] The top of the machine bin 2 is provided with an opening and the bottom of the hopper 3 is connected. The bottom of the machine bin 2 is provided with two discharge ports 21 at both ends, which can ensure that the material can be discharged quickly and uniformly from both ends. The longitudinal section of the bottom plate of the machine bin 2 is designed in an inverted V shape, which can ensure that the material flows naturally to both sides during transportation, avoid material congestion caused by accumulation in the middle, and enhance the uniform distribution of the material.

[0048] Screw conveying shaft design:

[0049] Two screw conveying shafts 4 are arranged side by side in the machine bin 2, and their two ends pass out of the machine bin 2 and are supported by the shaft seat 6. The shaft seat 6 is located on both sides of the machine bin 2 and is fixed on the workbench 1.

[0050] The screw conveying shaft 4 includes a screw cylinder part 41 and an extension shaft part 42 located on both sides of the screw cylinder part, and the screw cylinder part 41 is provided with two sections of helical leaves 43 with opposite rotation directions. The screw cylinder part 41 extends from the middle to both ends to the inside above the discharge port 21, for conveying the material in the middle to the discharge port 21 at both ends respectively; a plurality of raking rods 421 are arranged in a staggered manner on the extension shaft part 42.

[0051] The diameter of the helical leaves of the screw cylinder part 41 increases in steps from the middle to both ends. Such a design can avoid the accumulation of material on the helical leaves during transmission, optimize the distribution and conveying effect of the material in the screw conveying shaft; the larger space in the middle is conducive to the uniform pushing of the material during transmission, and the smaller space at both ends helps the material to flow smoothly to the discharge port, avoiding material blockage. The design is similar to the driving principle of the turbine impeller. The material is pressed downward from the middle under the action of its own weight, and the contact surface section of the material and the screw cylinder part 41 will form a curve opening upward. This design can reduce the resistance during material conveying, reduce the load of the driving motor, and thus significantly reduce energy consumption and save operating costs.

[0052] In addition, in order to prevent material leakage and pollution of the surrounding environment, a sealing plate is used to seal the connection between the machine bin 2 and the screw conveying shaft 4.

[0053] Reduction motor configuration:

[0054] Two reduction motors 5 are connected to two screw conveying shafts 4 through couplings 7, and two reduction motors 5 drive two screw conveying shafts 4 to rotate synchronously when working. The coupling 7 is provided with a coupling guard 71 to ensure that there is no accidental damage caused by coupling failure during operation.

[0055] Access hole and work platform design:

[0056] For the convenience of daily maintenance, the top of the machine bin 2 is provided with two manholes 22, which are respectively located directly above the two discharge ports 21, and the workers can check and clean the equipment through the manholes 22. The manholes are provided with cover plates 23. The workbench 1 is provided with a straight ladder 9 on one side, which facilitates the workers to carry out maintenance and maintenance work.

[0057] Working process description:

[0058] After the material enters the machine bin 2 from the hopper 3, the following process is completed:

[0059] Initial shunting stage: the material enters the machine bin 2 at an asymmetric speed through the differentiated inclined panel of the hopper 3, and is guided to the two sides under the inverted V-shaped bottom surface;

[0060] Bidirectional conveying stage: the middle helical blade group of the spiral conveying shaft 4 rotates in opposite directions, pushing the material to the two discharge ports 21 respectively, while the blade diameter increases to produce a centrifugal acceleration effect;

[0061] Dynamic anti-blocking stage: the reduced diameter design of the end shaft section increases the flow rate when the material is pushed to the discharge port 21.

[0062] Closed-loop control stage: the two reduction motors realize power complementary adjustment through the frequency converter, when the load of one discharge port 21 increases, the output torque of the other motor automatically increases to keep the total power consumption stable.

[0063] It should be noted that in this text, terms such as "including", "containing" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0064] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A twin-screw bi-directional outfeed feeder, characterized in that, It comprises a workbench, a machine bin, a hopper, screw conveying shafts, a speed reducer motor and a shaft base; the machine bin is fixed on the workbench, the hopper is located right above the machine bin, the bottom of the hopper is communicated with the inner cavity of the machine bin; the bottom of the machine bin is provided with discharge ports at both ends; two screw conveying shafts are arranged in parallel in the machine bin, the two ends of the screw conveying shafts are out of the machine bin and are supported by the shaft base; the shaft base is fixed on the workbench; two speed reducer motors are fixed on the workbench and are connected with the screw conveying shafts through couplings; the screw conveying shafts comprise screw cylinder parts and extension shaft parts located at both sides of the screw cylinder parts, two sections of helical leaves with opposite rotation directions are arranged on the screw cylinder parts for conveying the materials in the middle part to both ends; the diameters of the helical leaves of the screw cylinder parts are increased in steps from the middle part to both ends.

2. The twin-screw bi-directional outfeed feeder of claim 1, wherein, The hopper is in the shape of an inverted quadrangular pyramid, the front and rear panels are symmetrically arranged, and the left and right panels are asymmetrically arranged.

3. The twin-screw bi-directional outfeed feeder of claim 1, wherein, The longitudinal section of the bottom panel of the machine bin is in the shape of an inverted V, which makes the inner cavity of the machine bin gradually increase from the middle part to both ends of the outlet.

4. The twin-screw bi-directional outfeed feeder of claim 1, wherein, Two inspection openings are arranged on the top of the machine bin, which are located right above the two discharge ports; a cover plate is arranged on the inspection opening.

5. The twin-screw bi-directional outfeed feeder of claim 1, wherein, A straight ladder is arranged on one side of the workbench.

6. The twin-screw bi-directional outfeed feeder of claim 1, wherein, A sealing plate is arranged at the connection between the machine bin and the screw conveying shaft.

7. The twin-screw bi-directional outfeed feeder of claim 1, wherein, A plurality of material stirring rods are arranged on the extension shaft part of the screw conveying shaft.

8. The twin-screw bi-directional outfeed feeder of claim 1, wherein, The screw cylinder part of the screw conveying shaft extends to the inner side above the discharge port from the middle part to both ends.

9. The twin-screw bi-directional outfeed feeder of claim 1, wherein, A coupling guard is arranged on the outside of the coupling.

10. The twin-screw bi-directional outfeed feeder of claim 1, wherein, A wing plate extending outward is arranged on the top edge of the hopper.

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