Center water-cooled screw feeder

Abstract

The utility model discloses a central water-cooled screw feeder which can cool the head of a conveying shaft and protect the shaft head at the same time, so that the service life of the conveying shaft is greatly prolonged. The feeding machine comprises a feeding machine body and a spiral blade conveying shaft, the spiral blade conveying shaft is arranged in the feeding machine body and connected with the feeding machine body through a rotating bearing, and the feeding machine is characterized in that a central water inlet pipe is concentrically arranged in the spiral blade conveying shaft, and three-blade blocks are evenly distributed on a pipe body of the central water inlet pipe; and the end part of the water outlet end of the central water inlet pipe extends into the spiral blade conveying shaft to reach the shaft head of the spiral blade conveying shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass boiler feeder equipment, in particular to a central water-cooled spiral feeder. Background Art

[0002] Biomass boilers are mainly used for power generation with biomass raw materials. When the biomass boiler is in operation, the internal temperature is about 1000℃. When the feeder delivers the fuel into the furnace, the front end of the feeder's conveying shaft is very close to the inside of the biomass boiler. The conveying shaft will always be in a high temperature state and will continue to be radiated by the high-temperature flue gas of the boiler to produce high-temperature oxidation. Usually, the ignition point of biomass fuel only requires 300-400℃. The front end of the feeder's conveying shaft is in the flame. The existing feeder uses a water-cooling jacket to cool down the shell, which cannot effectively cool the conveying shaft. The high-temperature oxidation has a greater impact, reducing the service life of the conveying shaft. Utility Model Content

[0003] In view of the defect that the existing feeder cannot effectively cool the conveying shaft, the conveying shaft is greatly affected by high-temperature oxidation, and the service life of the conveying shaft is reduced, the utility model provides a central water-cooled screw feeder, which can cool the conveying shaft head and protect the shaft head at the same time, thereby greatly improving the service life of the conveying shaft.

[0004] The utility model provides the following technical solutions:

[0005] It includes a feeder body and a spiral blade conveying shaft, wherein the spiral blade conveying shaft is arranged inside the feeder body and connected to the feeder body through a rotating bearing, and is characterized in that a central water inlet pipe is concentrically arranged inside the spiral blade conveying shaft, three-blade blocks are evenly distributed on the pipe body of the central water inlet pipe, and the water outlet end of the central water inlet pipe extends into the spiral blade conveying shaft to reach the shaft head of the spiral blade conveying shaft.

[0006] It is further characterized by:

[0007] A feed port is provided on the tail end of the feeder body, near the connection between the feeder body and the biomass boiler. A water cooling pipe is installed on the feeder body, and the shaft head of the spiral blade conveying shaft extends into the water cooling pipe;

[0008] A driving box and a protection box are sequentially arranged on the outer side of one end of the feeder body away from the biomass boiler, a protection box is installed at the tail end of the spiral blade conveying shaft, and the tail end of the central water inlet pipe extends into the protection box, and a rotating shaft water inlet pipe is installed at the tail end of the central water inlet pipe at the center of the connection between the large box and the small box of the protection box, and the rotating shaft water inlet pipe extends vertically downward from the inside of the small box of the protection box, and a rotating shaft water outlet pipe is installed at the bottom of the large box of the protection box;

[0009] A driving motor is installed on the outer wall of the driving box. The motor shaft of the driving motor extending into the driving box is driven and connected to the spiral blade conveying shaft through a pair of meshing gears. The meshing gears are arranged in the driving box.

[0010] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0011] The spiral blade conveyor shaft is hollow and a central water inlet pipe is set in the shaft. While ensuring the conveying efficiency of the feeder, the overall cooling of the conveyor shaft is achieved. The head of the conveyor shaft enters the water cooling pipe, which has the performance of high temperature resistance and calcination resistance. The head of the conveyor shaft is protected, and the service life of the spiral blade conveyor shaft is greatly improved, which is beneficial to industrial production.

[0012] The setting of the three-blade block enables the central water inlet pipe to be stably coaxial with the spiral blade conveying shaft, and the spacing between the three-blade blocks forms a number of circumferential separation chambers. When facing the cooling water return, the cooling water realizes the overall cooling of the spiral blade conveying shaft, and there will be a certain amount of water distribution in each separation chamber, which avoids the situation of return water sedimentation and enables the spiral blade conveying shaft to be stably balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a top view of the overall structure of the utility model;

[0015] Figure 3 The main structure and partial cross-sectional view of the feeder of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the spiral blade conveying shaft of the utility model;

[0017] Figure 5 It is a schematic diagram of the structure of the spiral blade conveying shaft of the utility model.

[0018] Description of reference numerals:

[0019] 1. Feeder body; 2. Spiral blade conveying shaft; 3. Feed inlet; 4. Biomass boiler; 5. Drive box; 6. Drive gear; 7. Driven gear; 8. Shaft water inlet pipe; 9. Shaft water outlet pipe; 10. Water cooling pipe; 11. Rotating bearing; 12. Protection box; 13. Three-blade block; 14. Center water inlet pipe; 15. Drive motor. DETAILED DESCRIPTION

[0020] See Figure 1 The utility model provides Figure 1A central water-cooled screw feeder comprises a feeder body 1 and a spiral blade conveying shaft 2. The spiral blade conveying shaft 2 is arranged inside the feeder body 1 and connected to the feeder body 1 through a rotating bearing 11. Figure 5 A central water inlet pipe 14 is concentrically arranged inside the spiral blade conveying shaft 2, and three-leaf blocks 13 are evenly distributed on the body of the central water inlet pipe 14. The number of three-leaf blocks 13 is determined according to the length of the water inlet pipe 14. Figure 5 There are 16 three-leaf blocks 13, see Figure 5 The water outlet end of the central water inlet pipe 14 extends into the spiral blade conveying shaft 2 and reaches the shaft head of the spiral blade conveying shaft 2. The arrangement of the three-blade block 13 enables the central water inlet pipe 14 to be stably concentric with the spiral blade conveying shaft 2, and a number of circumferential separation chambers are formed between the three-blade blocks 13. When returning water, a certain amount of water will be distributed in each separation chamber, avoiding the situation of return water sedimentation, so that the spiral blade conveying shaft 2 can be stably balanced;

[0021] See Figure 1 , Figure 2 The head of the feeder body 1 is fixedly connected to the biomass boiler 4, and a feed port 3 is arranged at the tail end of the feeder body 1. A water cooling pipe 10 is installed on the feeder body 1 near the connection between the feeder body 1 and the biomass boiler 4. Figure 3 The shaft head of the spiral blade conveying shaft 2 extends into the water cooling pipe 10, and the cooling water enters the water cooling pipe 10 from one end of the water cooling pipe 10 to cool the shaft head of the spiral blade conveying shaft 2, and then is discharged from the other end of the water cooling pipe 10;

[0022] See Figure 2 A driving box 5 and a protection box 12 are sequentially arranged on the outer side of the end of the feeder body 1 away from the biomass boiler 4. Figure 5 A protection box 12 is installed at the tail end of the spiral blade conveying shaft 2, and the tail end of the central water inlet pipe 14 extends into the protection box 12. At the center of the connection between the large box and the small box of the protection box 12, a rotating shaft water inlet pipe 8 is installed at the tail end of the central water inlet pipe 14. The rotating shaft water inlet pipe 8 extends vertically downward from the inside of the small box of the protection box 12, and a rotating shaft water outlet pipe 9 is installed at the bottom of the large box of the protection box 12; the cooling water enters the central water inlet pipe 14 through the rotating shaft water inlet pipe 8, and then is discharged into the inside of the spiral blade conveying shaft 2 shaft head from the head of the central water inlet pipe 14. At this time, the cooling water moves from the inside of the spiral blade conveying shaft 2 shaft head to the large box of the protection box 12 to form a reflux, and is discharged outward through the rotating shaft water outlet pipe 9;

[0023] See Figure 4 The outer wall of the driving box 5 is equipped with a driving motor 15. The motor shaft of the driving motor 15 extending into the driving box 5 is connected to the spiral blade conveying shaft 2 through a pair of meshing gears. The meshing gears are arranged on the driving box 5, which are the driving gear 6 and the driven gear 7 (see Figure 4), the spiral blade conveying shaft 2 passes through the driving box 5. When the driving motor 15 rotates, the spiral blade conveying shaft 2 will rotate with it to convey the material.

Claims

1. A central water-cooled screw feeder, comprising a feeder body and a spiral blade conveying shaft, wherein the spiral blade conveying shaft is arranged inside the feeder body and connected to the feeder body through a rotating bearing, characterized in that: A central water inlet pipe is concentrically arranged inside the spiral blade conveying shaft, and three-blade blocks are evenly distributed on the pipe body of the central water inlet pipe. The water outlet end of the central water inlet pipe extends into the spiral blade conveying shaft to reach the shaft head of the spiral blade conveying shaft.

2. A central water-cooled screw feeder according to claim 1, characterized in that: A feed port is arranged on the tail end of the feeder body, close to the connection between the feeder body and the biomass boiler. A water cooling pipe is installed on the feeder body, and the shaft head of the spiral blade conveying shaft extends into the water cooling pipe.

3. A central water-cooled screw feeder according to claim 1 or 2, characterized in that: A driving box and a protection box are sequentially arranged on the outer side of one end of the feeder body away from the biomass boiler, a protection box is installed at the tail end of the spiral blade conveying shaft and the tail end of the central water inlet pipe extends into the protection box, and a rotating shaft water inlet pipe is installed at the tail end of the central water inlet pipe at the center of the connection between the large box and the small box of the protection box. The rotating shaft water inlet pipe extends vertically downward from the inside of the small box of the protection box, and a rotating shaft water outlet pipe is installed at the bottom of the large box of the protection box.

4. A central water-cooled screw feeder according to claim 3, characterized in that A driving motor is installed on the outer wall of the driving box. The motor shaft of the driving motor extending into the driving box is driven and connected to the spiral blade conveying shaft through a pair of meshing gears. The meshing gears are arranged in the driving box.

Images