High-voltage variable frequency screw conveyor

Abstract

This utility model discloses a high-pressure variable frequency screw conveyor, including a variable frequency motor, a conveying mechanism, and a connecting mechanism. The conveying mechanism is located to the right of the variable frequency motor, and the connecting mechanism is located to the right of the conveying mechanism. The conveying mechanism includes a gearbox, a coupling, a power shaft, a power shaft sealing cover, a packing seal, a spring sealing cover, a bolt, a sealing seat, an inner groove, a shaft protrusion, a pressure rotating bearing, a pressing sealing ring, sealing packing, a spring, a sealing gasket, a bolt, a screw shaft, a coupling pin, screw blades, a high-pressure purging air passage, and a lubricating grease passage. This solution, through integrated design, specifically addresses the pain points of existing technologies, such as high air consumption, heavy wear, poor sealing, high risk of hidden dangers, and frequent malfunctions, filling the gap in high-pressure screw conveyors and achieving efficient, safe, and low-consumption conveying of solid materials under high-pressure environments.

Description

Technical Field

[0001] This utility model relates to the field of screw conveyor technology, specifically a high-voltage variable frequency screw conveyor. Background Technology

[0002] In the field of solid material conveying, screw conveyors are frequently used, but currently available screw conveyors are mostly low-pressure or atmospheric-pressure screw conveyors.

[0003] In the field of coal gasification, especially fluidized bed gasifiers, solid materials are frequently transported to the gasifier. Under high pressure, there is currently no suitable high-pressure screw conveyor; the only option is a star feeder combined with high-pressure gas conveying. This not only results in high gas consumption during material transport but also leads to pipeline wear at high gas velocities, causing significant safety hazards. Furthermore, material blockages during solid material transport are difficult to resolve, thus placing higher demands on the quality of the transported materials, such as requiring them to be dry and free of impurities. These factors ultimately contribute to a high equipment failure rate.

[0004] Therefore, a solution is needed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, this utility model provides a high-pressure variable frequency screw conveyor to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A high-pressure variable frequency screw conveyor includes a variable frequency motor, a conveying mechanism, and a connecting mechanism. The conveying mechanism is located to the right of the variable frequency motor, and the connecting mechanism is located to the right of the conveying mechanism.

[0010] The conveying mechanism includes a gearbox, coupling, drive shaft, drive shaft sealing cover, packing seal, spring sealing cover, bolt one, sealing seat, inner groove, shaft protrusion, pressure rotating bearing, clamping sealing ring, sealing packing, spring, sealing gasket, bolt two, spiral shaft, coupling pin, spiral blades, high-pressure purging air passage, and lubricating grease passage. The gearbox is located at the right end of the variable frequency motor, the coupling is located at the right end of the gearbox, the drive shaft is located at the right end of the coupling, the drive shaft sealing cover is wrapped around the drive shaft, and the packing seal is wrapped around the drive shaft. The shaft is located on the right end of the power shaft sealing cover, the spring sealing cover is wrapped around the right end of the packing seal, the bolts are evenly distributed on the power shaft sealing cover and the spring sealing cover, the sealing seat is wrapped around the power shaft and located at the right end of the spring sealing cover, the inner groove is located inside the sealing seat, the shaft protrusion is located on the power shaft and inside the inner groove, the pressure rotating bearing is located at both ends of the shaft protrusion, the compression sealing ring is located at the right end of the pressure rotating bearing on the right side, and the sealing packing is located at the right end of the shaft protrusion.

[0011] Preferably, the spring wraps around the power shaft and is located inside the inner groove, abutting against the right end of the spring sealing cap at the left end of the compression sealing ring. The sealing gasket is located on the outer periphery of the left end of the inner groove. The two bolts are evenly distributed between the sealing seat and the spring sealing cap and are located on the outer periphery of the sealing gasket. The spiral shaft is fitted onto the right end of the power shaft. The coupling pin is located at the junction of the power shaft and the spiral shaft. The spiral blades are located on the spiral shaft. The high-pressure purging air passage is located at the bottom of the inner groove and extends to the right end of the sealing seat. The lubricating grease passage is located at the top of the inner groove and above the shaft protrusion.

[0012] Preferably, the inner groove has a conical structure, the shaft protrusion has an annular structure and is integrally formed with the power shaft, and the right end of the power shaft and the left end of the spiral shaft have matching protrusion and depression structures, respectively.

[0013] Preferably, the connecting mechanism includes a screw conveyor cylinder, a feed inlet, and three bolts. The screw conveyor cylinder is located at the right end of the sealing seat, the feed inlet is located at the top of the left end of the screw conveyor cylinder, and the three bolts are evenly distributed around the periphery between the sealing seat and the screw conveyor cylinder.

[0014] (III) Beneficial Effects

[0015] This utility model provides a high-pressure variable frequency screw conveyor. It has the following beneficial effects:

[0016] 1. This solution not only has strong anti-clogging capabilities, but also significantly reduces the amount of conveying air used. Due to the spiral conveyor, the material moves inside, and after being sprayed with a high wear-resistant coating, it can greatly reduce the wear of pipeline equipment.

[0017] 2. This solution utilizes a two-stage sealing method with a spring-loaded self-pressurizing seal, and leverages the lubricating and sealing capabilities of lubricating grease to significantly improve the shaft sealing performance of the equipment, overcoming the technical challenges that are difficult to overcome in the dynamic sealing performance of traditional screw conveyors.

[0018] 3. The high-pressure purging air duct is designed to create a high-pressure chamber within the screw conveyor during operation, which helps accelerate the flow of solid materials. When the screw stops working, the high-pressure air duct acts as a protective gas to prevent the high-temperature gas in the gasifier from backflush into the screw conveyor, thus improving the safety of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the power shaft structure of this utility model.

[0021] In the diagram: 1-Variable frequency motor; 2-Conveying mechanism; 21-Gearbox; 22-Coupling; 23-Power shaft; 24-Power shaft sealing cover; 25-Packing seal; 26-Spring sealing cover; 27-Bolt one; 28-Sealing seat; 29-Inner groove; 210-Shaft protrusion; 211-Pressure rotating bearing; 212-Pressure sealing ring; 213-Sealing packing; 214-Spring; 215-Sealing gasket; 216-Bolt two; 217-Screw shaft; 218-Coupling pin; 219-Screw blade; 220-High-pressure purging air passage; 221-Lubricating grease passage; 3-Connecting mechanism; 31-Screw conveyor cylinder; 32-Inlet; 33-Bolt three. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2The present invention provides a technical solution to achieve this: including a variable frequency motor 1 (model: 1LE1001-1DB23-3FA4), a conveying mechanism 2 and a connecting mechanism 3, wherein the conveying mechanism 2 is located to the right of the variable frequency motor 1 and the connecting mechanism 3 is located to the right of the conveying mechanism 2.

[0024] The conveying mechanism 2 includes a gearbox 21, a coupling 22, a drive shaft 23, a drive shaft sealing cover 24, a packing seal 25, a spring sealing cover 26, a bolt 27, a sealing seat 28, an inner groove 29, a shaft protrusion 210, a pressure rotating bearing 211, a pressing sealing ring 212, sealing packing 213, a spring 214, a sealing gasket 215, a bolt 216, a screw shaft 217, a coupling pin 218, a screw blade 219, a high-pressure purging air passage 220, and a lubricating grease passage 221. The gearbox 21 is located at the right end of the variable frequency motor 1, the coupling 22 is located at the right end of the gearbox 21, the drive shaft 23 is located at the right end of the coupling 22, and the drive shaft sealing cover 24 is located around the drive shaft. On shaft 23, packing seal 25 is wrapped around power shaft 23 and located at the right end of power shaft sealing cover 24. Spring sealing cover 26 is wrapped around the right end of packing seal 25. Bolts 27 are evenly distributed on power shaft sealing cover 24 and spring sealing cover 26. Sealing seat 28 is wrapped around power shaft 23 and located at the right end of spring sealing cover 26. Inner groove 29 is located inside sealing seat 28. Shaft protrusion 210 is set on power shaft 23 and located inside inner groove 29. Pressure rotating bearing 211 is set at both ends of shaft protrusion 210. Press sealing ring 212 is set at the right end of right pressure rotating bearing 211. Sealing packing 213 is set at the right end of shaft protrusion 210.

[0025] In detail, spring 214 wraps around power shaft 23 and is located inside inner groove 29, abutting the left end of compression sealing ring 212 and the right end of spring sealing cover 26. Sealing gasket 215 is located on the outer periphery of the left end of inner groove 29. Bolt 216 is evenly distributed between sealing seat 28 and spring sealing cover 26 and is located on the outer periphery of sealing gasket 215. Spiral shaft 217 is fitted to the right end of power shaft 23. Coupling pin 218 is located at the junction of power shaft 23 and spiral shaft 217. Spiral blade 219 is located on spiral shaft 217. High-pressure purging air passage 220 is located at the bottom of the interior of sealing seat 28 and extends to the right end of sealing seat 28. Lubricating grease passage 221 is located at the top of inner groove 29 and above shaft protrusion 210.

[0026] The inner groove 29 has a conical structure, the shaft protrusion 210 has an annular structure and is integrally formed with the power shaft 23, and the right end of the power shaft 23 and the left end of the spiral shaft 217 have matching protrusion and concave structures respectively.

[0027] The connecting mechanism 3 includes a screw conveyor cylinder 31, a feed inlet 32, and bolts 33. The screw conveyor cylinder 31 is located at the right end of the sealing seat 28, the feed inlet 32 ​​is located at the top of the left end of the screw conveyor cylinder 31, and the bolts 33 are evenly distributed around the periphery between the sealing seat 28 and the screw conveyor cylinder 31.

[0028] Solution Analysis:

[0029] 1. Cost reduction, efficiency improvement and blockage prevention: The main method is active spiral conveying, with high-pressure purging air duct 220 as the auxiliary conveyor, which greatly reduces the amount of conveying air used; the spiral closed conveyor avoids material accumulation, and with the help of purging air to unclog, it has strong anti-blockage ability and does not require strict restrictions on material quality.

[0030] 2. Reduced wear and extended service life: The material moves at a low speed inside the cylinder, avoiding high air velocity erosion and wear. In addition, the inside is sprayed with a high wear-resistant coating, providing double protection to reduce wear on pipeline equipment.

[0031] 3. Breakthrough in dynamic sealing bottleneck: Adopting a "two-stage sealing + spring self-pressurization + grease assistance" structure, the spring can automatically compensate for the wear gap of the sealing packing, the grease enhances lubrication and sealing performance, and the packing can be replaced individually, achieving stable sealing under high pressure.

[0032] 4. High safety against backflush: The high-pressure purging air duct 220 automatically ventilates when the machine stops, forming a protective barrier to prevent high-temperature gas from the gasifier from backflushing into the equipment and avoiding safety risks.

[0033] 5. Low failure rate and easy maintenance: The power shaft 23 and the screw shaft 217 are detachably connected by the coupling pin 218. In case of failure, the cylinder can be disassembled for repair. The replacement of vulnerable parts is convenient and reduces downtime costs.

[0034] Working principle:

[0035] 1. The high-pressure variable frequency screw conveyor is driven by a variable frequency motor 1 and connected to the power shaft 23 through a gearbox 21 and a coupling 22;

[0036] 2. To prevent wear and movement of the power shaft 23, two sets of pressure rotating bearings 211 are provided on both sides of the shaft protrusion 210 and are firmly fixed in the sealing seat 28 by spring sealing cover 26 and pressing sealing ring 212.

[0037] 3. A sealing packing 213 is installed inside the sealing seat 28. The packing is pressed by the sealing ring 212 and the spring 214, so that the packing and the power shaft 23 form a good sealing effect. When the power shaft 23 rotates and wears the packing, causing the gap to increase, the pressing spring 214 can apply pressure to the packing in time, so that the packing is compressed downward and it regains the sealing effect with the main shaft. When the packing is severely worn after long-term operation, the internal packing can be replaced. In addition, the power shaft sealing cover 24 can also play a sealing role.

[0038] 4. Lubricating grease is pressurized and injected into the cavity containing the pressure rotating bearing 211 through the lubricating grease channel 221. This ensures lubrication of the pressure rotating bearing 211, extending its service life. Simultaneously, the lubricating grease can also penetrate into the sealing packing, ensuring good lubrication between the sealing packing 213 and the drive shaft 23. This also provides a sealing effect. During operation, grease needs to be replenished periodically to ensure good internal lubrication and sealing performance.

[0039] 5. The power shaft 23 and the screw shaft 317 are connected by a coupling pin 218. In case of equipment failure, the screw conveyor cylinder 31 can be disassembled first to repair and maintain the equipment.

[0040] 6. The function of the high-pressure purging air duct 220 is to assist in the conveying of materials and to activate the ventilation protection when the screw conveyor stops working.

[0041] 7. The screw conveyor cylinder 31 is coated with a high wear-resistant coating to reduce wear on pipeline equipment.

[0042] Technical effects of implementing this solution:

[0043] This solution, through integrated design, specifically addresses the pain points of existing technologies, such as high gas consumption, heavy wear, poor sealing, high risk of hidden dangers, and frequent malfunctions. It fills the gap in high-pressure screw conveyors and enables efficient, safe, and low-consumption conveying of solid materials under high-pressure environments.

[0044] This utility model comprises: 1-Variable frequency motor; 2-Conveying mechanism; 21-Reduction gearbox; 22-Coupling; 23-Power shaft; 24-Power shaft sealing cover; 25-Packing seal; 26-Spring sealing cover; 27-Bolt one; 28-Sealing seat; 29-Inner groove; 210-Shaft protrusion; 211-Pressure rotating bearing; 212-Pressure sealing ring; 213-Sealing packing; 214-Spring; 215-Sealing gasket; 216-Bolt two; 217-Spiral shaft; 218-Coupling pin; 219-Spiral blade; 220-High-pressure purging air passage; 221-Lubricating grease passage; 3-Connecting... The components are: 31-screw conveyor cylinder; 32-feed inlet; 33-bolt three. These components are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. The problem solved by this utility model is that in the field of coal gasification, in the high-pressure solid material conveying of fluidized bed gasifiers, there is no available high-pressure screw conveyor in the existing technology. Only a star feeder can be used in conjunction with high-pressure gas conveying, which has the problems of high gas consumption, pipeline wear and safety hazards, difficulty in solving material blockage, high requirements for material quality and high equipment failure rate. This utility model, through integrated design, specifically solves the pain points of high gas consumption, heavy wear, poor sealing, high hidden dangers and many failures in the existing technology, fills the gap of high-pressure screw conveyors, and realizes efficient, safe and low-consumption conveying of solid materials under high pressure.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-pressure variable frequency screw conveyor, characterized in that: It includes a variable frequency motor (1), a conveying mechanism (2) and a connecting mechanism (3), wherein the conveying mechanism (2) is located to the right of the variable frequency motor (1) and the connecting mechanism (3) is located to the right of the conveying mechanism (2); The conveying mechanism (2) includes a gearbox (21), a coupling (22), a power shaft (23), a power shaft sealing cover (24), a packing seal (25), a spring sealing cover (26), a bolt (27), a sealing seat (28), an inner groove (29), a shaft protrusion (210), a pressure rotating bearing (211), a pressing sealing ring (212), sealing packing (213), a spring (214), a sealing gasket (215), a bolt (216), a spiral shaft (217), a coupling pin (218), spiral blades (219), a high-pressure purging air passage (220), and a lubricating grease passage (221). The gearbox (21) is located at the right end of the variable frequency motor (1), the coupling (22) is located at the right end of the gearbox (21), the power shaft (23) is located at the right end of the coupling (22), and the power shaft sealing cover (24) is wrapped around the power shaft (23). The packing seal (25) is wrapped around the power shaft (23) and located at the right end of the power shaft sealing cover (24). The spring sealing cover (26) is wrapped around the right end of the packing seal (25). The bolts (27) are evenly distributed on the power shaft sealing cover (24) and the spring sealing cover (26). The sealing seat (28) wraps around the power shaft (23) and is located at the right end of the spring sealing cover (26). The inner groove (29) is located inside the sealing seat (28). The shaft protrusion (210) is located on the power shaft (23) and is located inside the inner groove (29). The pressure rotating bearing (211) is located at the left and right ends of the shaft protrusion (210). The compression sealing ring (212) is located at the right end of the right pressure rotating bearing (211). The sealing packing (213) is located at the right end of the shaft protrusion (210).

2. The high-pressure variable frequency screw conveyor according to claim 1, characterized in that: The spring (214) encloses the power shaft (23) and is located inside the inner groove (29), abutting the left end of the compression sealing ring (212) and the right end of the spring sealing cover (26). The sealing gasket (215) is located on the outer periphery of the left end of the inner groove (29). The bolts (216) are evenly distributed between the sealing seat (28) and the spring sealing cover (26) and are located on the outer periphery of the sealing gasket (215). The spiral shaft (217) fits into the design. The coupling pin (218) is located at the junction of the power shaft (23) and the screw shaft (217), the screw blade (219) is located on the screw shaft (217), the high-pressure purging air passage (220) is located at the bottom of the interior of the sealing seat (28) and extends to the right end of the sealing seat (28), and the lubricating grease passage (221) is located at the top of the inner groove (29) and above the shaft protrusion (210).

3. The high-pressure variable frequency screw conveyor according to claim 2, characterized in that: The inner groove (29) has a conical structure, the shaft protrusion (210) has an annular structure and is integrally formed with the power shaft (23), and the right end of the power shaft (23) and the left end of the spiral shaft (217) have matching protrusion and concave structures respectively.

4. The high-pressure variable frequency screw conveyor according to claim 3, characterized in that: The connecting mechanism (3) includes a screw conveyor cylinder (31), a feed inlet (32), and three bolts (33). The screw conveyor cylinder (31) is located at the right end of the sealing seat (28), the feed inlet (32) is located at the top of the left end of the screw conveyor cylinder (31), and the three bolts (33) are evenly distributed around the periphery between the sealing seat (28) and the screw conveyor cylinder (31).

Images