Easy to dredge silo
By designing an inclined wall and an L-shaped elastic hammer on the side wall of the coal bin, and setting up an agitating shaft and a second drive cylinder, the problem of easy formation of an arch structure during the coal material drop is solved, and the smooth flow of the coal material and rapid damage of the arch structure is achieved.
Patent Information
- Application Number
- CN202421984376.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The existing coal silos are prone to form an arch structure during the coal material drop, which makes the coal material difficult to fall easily and is difficult to effectively destroy the arch structure, affecting the normal flow of coal material.
A silo easy to clear silo is designed, with its side wall structures being three vertical side walls and one oblique wall. The inclination angle of the oblique wall is greater than the friction angle between the coal material and the inner surface of the oblique wall. An L-shaped elastic hammer is provided on the vertical side wall opposite the oblique wall. Through the first driving cylinder, the hammer head is driven to hit the vertical side wall opposite the oblique wall, destroying the arch structure. In addition, an agitating shaft and a second driving cylinder are provided, and the agitating shaft and agitating rod are repeatedly swung to further break the arch structure.
It effectively prevents the coal material from forming an arch structure during the falling process, ensures the normal flow of the coal material, and quickly destroys the arch structure through remote control, avoiding the coal bin blockage.
Smart Images
Figure CN222699167U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an easy-to-dredge silo. Background Art
[0002] Coal bunker refers to the storage bin for raw coal, coal slime and other granular materials in thermal power plants. It is an important equipment to ensure stable combustion and stable coal supply of boilers and is widely used. The lower part of the raw coal bunker is usually in an inverted cone shape, and the cross-sectional area gradually decreases from top to bottom. The discharge port at the bottom of the coal bunker is connected to the feed port of the coal feeder, and the coal in the coal bunker enters the coal feeder through the discharge port.
[0003] The Chinese invention patent authorized and announced on February 24, 2016 discloses a screw feeder for a coal-fired industrial boiler, which includes a motor, a feed bin and a feeder barrel. The feeder barrel has a horizontal screw shaft built in, the output shaft of the motor is fixedly connected to one end of the horizontal screw shaft, and the feed bin is connected to the feeder barrel.
[0004] The side walls on both sides of the lower part of the coal bunker above the existing coal feeder are mostly symmetrical inclined walls. Sometimes, during the process of coal falling, an arched structure with low periphery and high middle is formed in the coal bunker, which affects the normal falling of coal. The existing technology lacks an easy-to-dredge bunker that is not easy to form an arched structure and easy to break the arched structure. Summary of the invention
[0005] The technical problem to be solved by the utility model is how to overcome the above-mentioned defects of the prior art and provide an easy-to-dredge silo.
[0006] In order to solve the above technical problems, the easy-to-dredge silo includes a silo, a screw feeder is provided at the lower opening of the silo, and the silo is surrounded by four side walls, characterized in that: the upper part of one side wall of the silo is a vertical side wall, and the lower part thereof is an inclined wall bent toward the other side wall, and the other three side walls are all vertical side walls, and the inclination angle of the inclined wall is greater than the friction angle between the coal and the inner surface of the inclined wall, and an L-shaped elastic hammer is provided on the vertical side wall on the opposite side of the inclined wall, and the L-shaped elastic hammer includes an L-shaped lever and a hammer head, and the hammer head is fixed to one end of the L-shaped lever through a spring connecting rod, and the middle section of the L-shaped lever is hinged on a lug, The other end of the L-shaped lever is hinged to the front end of the piston rod of the first driving cylinder. The root of the cylinder body of the first driving cylinder is hinged to another lug. Both lugs are fixed on adjacent vertical side walls. The first driving cylinder is connected to the high-pressure air supply pipe through an accompanying solenoid valve. The accompanying solenoid valve is remotely controlled and can drive the hammer head of the L-shaped elastic hammer to strike the vertical side wall on the opposite side of the inclined wall regularly or irregularly through the first driving cylinder.
[0007] With this design, the screw feeder acts as a coal feeder, and three of the silo side walls above it are vertical side walls, and only one side wall is an inclined wall. Under this structure, it is difficult for the coal inside the coal bin to form an arch structure, and it is not easy to be blocked by coal. Even if an arch structure is formed, as long as the electromagnetic valve is remotely controlled, the hammer head of the L-shaped elastic hammer is driven by the first driving cylinder to knock on the vertical side wall on the opposite side of the inclined wall, causing it to vibrate due to knocking, and the arch structure can also be vibrated down.
[0008] As an optimization, a through hole is opened in the middle of the inclined wall, and a stirring shaft is passed through the through hole. The inner end of the stirring shaft extends into the silo and is fixed on a stirring rod. The outer end of the stirring shaft extends out of the through hole and is connected to a rocker arm. The outer end of the rocker arm is hinged on the front end of the piston rod of the second driving cylinder. The root of the cylinder body of the second driving cylinder is hinged and fixed to the inclined wall through a fixed axis. The second driving cylinder is connected to the high-pressure air supply pipe through an electromagnetic valve. The electromagnetic valve is remotely controlled, and the stirring shaft and the stirring rod can be driven by the second driving cylinder to swing around the axis of the stirring shaft at regular or irregular times. When the second driving cylinder stops, the stirring rod is parallel to the vertical side walls on both sides thereof.
[0009] With this design, even if the coal contains a lot of water or has a high viscosity, causing the side wall of the coal bin to be hit and the arch structure is difficult to remove, the second driving cylinder can be started to drive the stirring shaft and the stirring rod to swing repeatedly several times to break the arch structure inside the coal bin, and the stirring rod is parallel to the vertical side walls on both sides as the starting state of stirring. The horizontal cross-section of the stirring rod is small, and the coal is less hindered by the stirring rod when it falls, thereby minimizing the obstruction of the stirring rod to the coal.
[0010] As an optimization, a boss is provided at the inner end of the stirring shaft, and a coil spring is sleeved on the stirring shaft, and the two ends of the coil spring are respectively against the inclined wall and the swing rod, and the coil spring pulls the stirring shaft outward so that the boss blocks the through hole. In this design, the coil spring pulls the stirring shaft outward, and its boss seals the through hole to prevent coal powder from leaking out of the through hole.
[0011] This easy-to-dredge silo has a simple structure and is easy to use. It is suitable for thermal power plants, coal preparation plants, cement plants and other enterprises that need to use large silos. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The following is a further description of the practical easy-to-dredge silo in conjunction with the accompanying drawings:
[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the coal bunker in the first implementation method of the easy-to-dredge bunker;
[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the spiral feeder in the first embodiment of the easy-to-dredge silo;
[0015] Figure 3This is a schematic diagram of the side view structure of the coal bunker in the first embodiment of the easy-to-dredge bunker;
[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the second implementation method of the easy-to-dredge silo in the normal state (the normal state is the stirring starting state, in which the stirring rod is parallel to the vertical side walls on both sides);
[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the second implementation method of the easy-to-dredge silo in the stirring end state.
[0018] In the figure: 1 is a silo, 2 is a screw feeder, 3 is a vertical side wall, 4 is an inclined wall, 5 is an L-shaped elastic hammer, 51 is an L-shaped lever, 52 is a hammer head, 53 is a spring connecting rod, 6 is a lug, 7 is a first driving cylinder, 8 is a stirring shaft, 9 is a stirring rod, 10 is a rocker arm, 11 is a second driving cylinder, 12 is a fixed shaft, 13 is a boss, 14 is a coil spring, 15 is a horizontal plane, and a is an inclination angle of the inclined wall. DETAILED DESCRIPTION
[0019] Implementation method 1: Figure 1-3 As shown, the easy-to-dredge silo includes a silo 1, a screw feeder 2 is provided at the lower opening of the silo 1, and the silo 1 is surrounded by four side walls, characterized in that: the upper portion of one side wall of the silo is a vertical side wall 3, and the lower portion thereof is an inclined wall 4 bent toward the other side wall, and the other three side walls are all vertical side walls, and the inclination angle of the inclined wall 4 (i.e., the angle a between the inner surface of the inclined wall 4 and the horizontal plane 15) is greater than the friction angle between the coal material and the inner surface of the inclined wall 4 (the radian of the friction angle is equal to the inverse tangent function of the friction coefficient between the coal powder and the inclined wall), and an L-shaped elastic hammer 5 is provided on the vertical side wall 3 on the opposite side of the inclined wall 4, and the L-shaped elastic hammer 5 includes an L-shaped lever 51 and a hammer head 52, and the hammer head 52 is fixed to one end of the L-shaped lever 51 through a spring connecting rod 53, and the middle section of the L-shaped lever 51 is hinged on a lug 6, The other end of the L-shaped lever 6 is hinged to the front end of the piston rod of the first driving cylinder 7. The root of the cylinder body of the first driving cylinder 7 is hinged to another lug 6. Both lugs 6 are fixed on adjacent vertical side walls 3. The first driving cylinder 7 is connected to a high-pressure air supply pipe (not shown in the figure) through an electromagnetic valve (not shown in the figure). The electromagnetic valve is remotely controlled and can drive the hammer head 52 of the L-shaped elastic hammer 5 to strike the vertical side wall 3 on the opposite side of the inclined wall 4 periodically or irregularly through the first driving cylinder 7.
[0020] Implementation method 2: Figure 4-5As shown, a through hole is opened in the middle of the inclined wall 4, and a stirring shaft 8 is penetrated in the through hole. The inner end of the stirring shaft 8 extends into the silo 1 and is fixed on a stirring rod 9. The outer end of the stirring shaft 8 extends out of the through hole and is connected to a swing rod 10. The outer end of the swing rod 10 is hinged on the front end of the piston rod of the second driving cylinder 11. The root of the cylinder body of the second driving cylinder 11 is hinged and fixed on the inclined wall 4 through a fixed shaft 12. The second driving cylinder 11 is connected to the high-pressure air supply pipe (not shown in the figure) through an electromagnetic valve (not shown in the figure). The electromagnetic valve is remotely controlled to drive the stirring shaft 8 and the stirring rod 9 to swing around the axis of the stirring shaft 8 through the second driving cylinder 11 at regular or irregular times, and when the second driving cylinder 11 stops, the stirring rod 9 is parallel to the vertical side walls 3 on both sides thereof.
[0021] A protrusion 13 is provided at the inner end of the stirring shaft 8, and a coil spring 14 is sleeved on the stirring shaft 8. The two ends of the coil spring 14 are respectively against the inclined wall 4 and the rocker rod 10. The coil spring 14 pulls the stirring shaft 8 outward so that the protrusion 13 blocks the through hole. The remaining structure is as described in the first embodiment and is omitted.
Claims
1. An easy-to-dredge silo, comprising a silo, a spiral feeder is provided at the lower opening of the silo, the silo is surrounded by four side walls, and is characterized by: The upper part of one side wall of the silo is a vertical side wall, and the lower part thereof is an inclined wall bent toward the other side wall, and the other three side walls are all vertical side walls. The inclination angle of the inclined wall is greater than the friction angle between the coal and the inner surface of the inclined wall. An L-shaped elastic hammer is provided on the vertical side wall on the opposite side of the inclined wall. The L-shaped elastic hammer includes an L-shaped lever and a hammer head. The hammer head is fixed to one end of the L-shaped lever through a spring connecting rod. The middle section of the L-shaped lever is hinged on a lug, and the other end of the L-shaped lever is hinged to the front end of the piston rod of the first driving cylinder. The root of the cylinder body of the first driving cylinder is hinged on another lug, and the two lugs are fixed on adjacent vertical side walls. The first driving cylinder is connected to the high-pressure air supply pipe through an electromagnetic valve. The electromagnetic valve is remotely controlled, and the hammer head of the L-shaped elastic hammer can be driven by the first driving cylinder to strike the vertical side wall on the opposite side of the inclined wall regularly or irregularly.
2. The easy-to-dredge silo according to claim 1, characterized in that: A through hole is provided in the middle of the inclined wall, a stirring shaft is passed through the through hole, an inner end of the stirring shaft extends into the silo and is fixed on a stirring rod, an outer end of the stirring shaft extends out of the through hole and is connected to a rocker arm, an outer end of the rocker arm is hinged on the front end of the piston rod of the second driving cylinder, a root of the cylinder body of the second driving cylinder is hinged and fixed to the inclined wall through a fixed axis, the second driving cylinder is communicated with the high-pressure air supply pipe through an electromagnetic valve, and the electromagnetic valve is remotely controlled to drive the stirring shaft and the stirring rod to swing around the axis of the stirring shaft through the second driving cylinder at regular or irregular times, and when the second driving cylinder stops, the stirring rod is parallel to the vertical side walls on both sides thereof.
3. The easy-to-dredge silo according to claim 2, characterized in that: A protrusion is provided at the inner end of the stirring shaft, and a coil spring is sleeved on the stirring shaft, and the two ends of the coil spring are respectively against the inclined wall and the swing rod. The coil spring pulls the stirring shaft outward so that the protrusion blocks the through hole.