Ash bin arch breaking anti-blocking structure

Abstract

This invention provides a structure for breaking up and preventing blockages in an ash silo, including a transfer pipe and an exhaust pipe arranged vertically along the central axis of the ash silo. The transfer pipe and the exhaust pipe are connected by a rotating seal. It also includes an air supply pipe that works in conjunction with the ash silo, with both ends connected to a high-pressure air pump and the transfer pipe, respectively. The bottom end of the exhaust pipe is closed, and its vertical sidewall has several exhaust holes. The spacing, orientation, and inner and outer diameters of the exhaust holes are inconsistent and randomly distributed. The exhaust pipe can rotate freely around the central axis of the ash silo. Because the spacing, orientation, and inner and outer diameters of the exhaust holes are inconsistent and randomly distributed, the incoming airflow can impact the powder with different pressures, directions, and distribution densities after passing through the exhaust holes, resulting in greater randomness and a stronger ability to break up caking materials. The exhaust pipe can also rotate, allowing for better airflow dispersion in all directions, thus achieving a better breaking up effect.

Description

Technical Field

[0001] This utility model relates to the technical field of ash silo arch breaking equipment, and in particular to an ash silo arch breaking and anti-blocking structure. Background Technology

[0002] Ash silos are common dust storage devices in modern industry. In the thermal power generation industry, ash hoppers are an important part of boiler equipment, mainly used to store ash and other impurities in flue gas to prevent them from affecting the boiler. In addition, ash hoppers are also components of dust removal equipment, used to collect dust and other solid particles in emissions, playing an important role in protecting downstream equipment. Furthermore, in industries such as stone processing and powder processing, powder materials need to be stored, thus requiring the use of ash silos as storage and transfer equipment.

[0003] However, after powdered materials are stored in the ash silo for a period of time, they inevitably caking and clogging due to the pressure from the materials above, affecting subsequent discharge. Therefore, the bottom of the ash silo is usually equipped with an arch-breaking and anti-clogging device to break the caking and blockage of the material and allow it to be discharged normally from the bottom of the ash silo. Existing arch-breaking devices are usually pulse-blowing structures. The principle is to use a pulse high-pressure air pump to intermittently blow air towards the bottom of the silo, using the airflow to move the powder and thus break its caking state. For example, Chinese utility model patent application number CN2014202422747 includes an ash hopper body, a support on one side of the ash hopper body, and an ash blowing device on the support. The ash blowing device includes an air chamber, a pulse valve, and a blowpipe. The air chamber is fixed on the support, the air inlet of the blowpipe is connected to the air outlet of the air chamber, the air outlet of the blowpipe is located inside the ash hopper body, the outlet of the blowpipe faces the outlet of the ash hopper body, the pulse valve is located on the blowpipe, and several nozzles are set on the section of the blowpipe located inside the ash hopper body. The dust removal method using the above-mentioned dust removal device is much more efficient than manual dust removal, and it does not require manual labor, thus avoiding harm to workers.

[0004] However, this traditional pulse air blowing structure has certain problems. The nozzles are positioned precisely, and the pressure and frequency of the pulse airflow are also fixed, resulting in a relatively predictable airflow impact on the ash hopper. When the powder is damp and severely caking, this structure is less effective at breaking up bridging. Therefore, a device with stronger bridging capabilities is needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a structure for breaking up and preventing blockages in ash silos. This structure solves the problem that existing technologies have a relatively regular impact on the airflow inside the ash silo, resulting in poor breaking up of severely caking powder.

[0006] According to an embodiment of this utility model, an anti-bridging and anti-clogging structure for an ash silo is provided. The anti-bridging and anti-clogging structure is set at the bottom outlet of the ash silo and includes a transfer pipe and an exhaust pipe arranged vertically along the central axis of the ash silo. The bottom of the transfer pipe and the top of the exhaust pipe are connected by a rotating seal. The structure also includes an air supply pipe that is matched with the ash silo. One end of the air supply pipe is located outside the ash silo and connected to a high-pressure air pump, and the other end is located inside the ash silo and connected to the top of the transfer pipe. The bottom end of the exhaust pipe is closed, and a plurality of exhaust holes are provided on its vertical sidewall. The spacing, orientation, and inner and outer diameters of the exhaust holes are not consistent and are randomly distributed. The exhaust pipe can rotate freely around the central axis of the ash silo.

[0007] Furthermore, a rotary sealing joint is provided between the adapter pipe and the exhaust pipe, so that the top of the exhaust pipe can communicate with the inside of the adapter pipe while also being able to rotate axially.

[0008] Furthermore, a motor is also provided at the bottom of the exhaust pipe, and the output shaft of the motor is coaxial with the exhaust pipe and fixedly connected to the bottom end of the exhaust pipe to drive the exhaust pipe to rotate.

[0009] Furthermore, both the air supply pipe and the motor are provided with horizontal connecting rods on their outer sides. These connecting rods are connected to the inner wall of the ash hopper, thereby suspending and fixing the air supply pipe and the motor at the position of the central axis inside the ash hopper.

[0010] Furthermore, the bottom end face of the rotary sealing joint is provided with a sealing plate, which has a semi-circular structure, thereby sealing half of the area of ​​the bottom end face of the rotary sealing joint.

[0011] Furthermore, the top end face of the exhaust pipe is provided with several baffles, the baffles are fan-shaped plates and are arranged around the center of the exhaust pipe end face, the arc lengths of the baffles are not the same, and the distance between adjacent arc lengths of the baffles is also not the same.

[0012] Furthermore, an auxiliary air inlet pipe is also connected to the air supply pipe, and a one-way valve is provided at the location of the auxiliary air inlet pipe corresponding to the air supply pipe. The connection between the auxiliary air inlet pipe and the air supply pipe is located at the end of the one-way valve near the ash hopper.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, the exhaust pipe is vertically arranged, and several exhaust holes are provided on the side wall of the exhaust pipe. The spacing, orientation, and inner and outer diameters of the exhaust holes are inconsistent, exhibiting a random distribution. Therefore, the incoming airflow, after passing through the exhaust holes, can impact the powder with different pressures, directions, and distribution densities, exhibiting greater randomness and a stronger ability to break up caking materials. Furthermore, in this invention, the exhaust pipe can rotate freely around the central axis of the ash hopper, thus allowing for better airflow dispersion in all directions, achieving a more effective caking-breaking effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axial cross-section of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram showing the connection between the transfer pipe and the exhaust pipe in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the bottom end face of the rotary sealing joint in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the top end face of the exhaust pipe in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram showing the connection between the air supply pipe and the auxiliary air intake pipe in an embodiment of this utility model.

[0020] In the above attached diagram: 1. Ash hopper; 2. Air supply pipe; 3. Transfer pipe; 4. Exhaust pipe; 5. Motor; 6. Sealing plate; 7. Baffle plate; 21. Auxiliary air intake pipe; 22. One-way valve; 31. Rotary sealing joint; 41. Exhaust port; 51. Connecting rod. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown in the figure, this utility model embodiment proposes an arch-breaking and anti-blocking structure for ash silos, which is set at the bottom outlet of ash silo 1.

[0023] In this embodiment, the anti-bridging and anti-blocking structure includes a transfer pipe 3 and an exhaust pipe 4 arranged vertically along the central axis of the ash silo 1. The bottom of the transfer pipe 3 and the top of the exhaust pipe 4 are connected by a rotary seal, specifically by a rotary seal joint 31, so that the top of the exhaust pipe 4 can communicate with the inside of the transfer pipe 3 while also allowing axial rotation. It also includes an air supply pipe 2 that works in conjunction with the ash silo 1. One end of the air supply pipe 2 is located outside the ash silo 1 and connected to a high-pressure air pump (not shown), while the other end is located inside the ash silo 1 and communicates with the top of the transfer pipe 3. This allows high-pressure airflow to be pumped into the ash silo 1 by the high-pressure air pump to break up the bridging.

[0024] like Figure 2As shown, preferably, the bottom end of the exhaust pipe 4 is closed, and several exhaust holes 41 are provided on its vertical sidewall. The spacing, orientation, and inner and outer diameters of the exhaust holes 41 are inconsistent and randomly distributed. Therefore, the incoming airflow can impact the powder with different pressures, directions, and distribution densities after passing through the exhaust holes 41, resulting in greater randomness and stronger arch-breaking ability for caking materials. In addition, a motor 5 is also provided at the bottom of the exhaust pipe 4. The output shaft of the motor 5 is coaxial with the exhaust pipe 4 and fixedly connected to the bottom end of the exhaust pipe 4, driving the exhaust pipe 4 to rotate. Therefore, airflow can be sprayed from all directions of the powder more effectively, achieving a better arch-breaking effect. At the same time, the motor 5 can also be placed outside the ash hopper 1, and the rotation of the exhaust pipe 4 can be driven by a closed transmission structure, such as bevel gear transmission, to facilitate heat dissipation of the motor 5. Since this transmission method is relatively existing, it will not be described in detail here.

[0025] like Figure 3 As shown, an auxiliary air inlet pipe 21 is also connected to the air supply pipe 2. A one-way valve 22 is installed at the location of the auxiliary air inlet pipe 21 corresponding to the air supply pipe 2. The connection between the auxiliary air inlet pipe 21 and the air supply pipe 2 is located at the end of the one-way valve 22 near the ash hopper 1. An air pump (not shown) is installed at the other end of the auxiliary air inlet pipe 21. The air pump continuously and at a low flow rate introduces gas, so that the inside of the exhaust pipe 4 is always under positive pressure. This can prevent powder from entering the exhaust pipe 4 from the exhaust port 41 and causing blockage of the exhaust pipe 4 itself.

[0026] It should be noted that both the air supply pipe 2 and the motor 5 are equipped with horizontal connecting rods 51 on their outer sides. These connecting rods 51 are connected to the inner wall of the ash hopper 1, thereby suspending and fixing the air supply pipe 2 and the motor 5 in the middle of the ash hopper 1. This achieves the fixation of the air supply pipe 2 and the motor 5, and consequently, also achieves the axial fixation of the exhaust pipe 4.

[0027] like Figure 4 , 5 As shown, in a preferred embodiment, the bottom end face of the rotary sealing joint 31 is provided with a sealing plate 6, which has a semi-circular structure, thereby sealing half of the area of ​​the bottom end face of the rotary sealing joint 31. Furthermore, the top end face of the exhaust pipe 4 is provided with several baffle plates 7, which are fan-shaped plates arranged around the center of the end face of the exhaust pipe 4. The arc lengths of the baffle plates 7 are all inconsistent, and the distance between adjacent arc lengths of the baffle plates 7 is also inconsistent. Thus, when the exhaust pipe 4 rotates relative to the rotary sealing joint 31, the magnitude of the introduced airflow also changes accordingly, further changing the flow rate and pressure of the pulsed airflow, achieving a better airflow arch-breaking effect.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A structure for breaking arches and preventing blockages in an ash silo, wherein the structure is installed at the bottom outlet of the ash silo, characterized in that: The device includes a transfer pipe and an exhaust pipe arranged vertically along the central axis of the ash silo. The bottom of the transfer pipe and the top of the exhaust pipe are connected by a rotating seal. It also includes an air supply pipe that is matched with the ash silo. One end of the air supply pipe is located outside the ash silo and connected to a high-pressure air pump, and the other end is located inside the ash silo and connected to the top of the transfer pipe. The bottom end of the exhaust pipe is closed, and several exhaust holes are provided on its vertical sidewall. The spacing, orientation, and inner and outer diameters of the exhaust holes are not consistent and are randomly distributed. The exhaust pipe can rotate freely around the central axis of the ash silo.

2. The anti-arching and anti-blocking structure for ash silos as described in claim 1, characterized in that: A rotary sealing joint is provided between the adapter pipe and the exhaust pipe, so that the top of the exhaust pipe can communicate with the inside of the adapter pipe while also allowing axial rotation.

3. The anti-arching and anti-blocking structure for ash silos as described in claim 1, characterized in that: A motor is also installed at the bottom of the exhaust pipe. The output shaft of the motor is coaxial with the exhaust pipe and fixedly connected to the bottom end of the exhaust pipe, driving the exhaust pipe to rotate.

4. The anti-arching and anti-blocking structure for ash silos as described in claim 3, characterized in that: Both the air supply pipe and the motor are equipped with horizontal connecting rods on their outer sides. These connecting rods are connected to the inner wall of the ash silo, thereby suspending and fixing the air supply pipe and the motor in the position of the central axis inside the ash silo.

5. The anti-arching and anti-blocking structure for ash silos as described in claim 2, characterized in that: The bottom end face of the rotary sealing joint is provided with a sealing plate, which has a semi-circular structure, thereby sealing half of the area of ​​the bottom end face of the rotary sealing joint.

6. The anti-arching and anti-blocking structure for ash silos as described in claim 5, characterized in that: The exhaust pipe has several baffles on its top end face. The baffles are fan-shaped and are arranged around the center of the exhaust pipe end face. The arc lengths of the baffles are all different, and the distance between adjacent arc lengths of the baffles is also different.

7. The anti-arching and anti-blocking structure for ash silos as described in claim 1, characterized in that: An auxiliary air inlet pipe is also connected to the air supply pipe. A one-way valve is installed at the location of the auxiliary air inlet pipe corresponding to the air supply pipe. The connection between the auxiliary air inlet pipe and the air supply pipe is located at the end of the one-way valve near the ash hopper.

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