Tower furnace slagging device

Abstract

This invention relates to the field of boiler ash removal technology and discloses a tower-type boiler ash removal device, comprising a housing, a drive shaft, a valve plate, a valve seat, and a sealing bushing. The housing has a connection hole communicating with the ash removal port of the tower-type boiler. The drive shaft is slidably disposed within the housing. The valve plate is connected to the drive shaft. The annular valve seat is disposed within the housing and communicates with the connection hole. The sealing bushing is disposed on the side of the valve plate near the valve seat and is used to insert into the valve seat. The drive shaft drives the valve plate to reciprocate, causing the valve plate to separate from or fit against the valve seat. This invention achieves reliable sealing through the insertion and engagement of the sealing bushing and the valve seat, effectively preventing ash leakage and cold air ingress. The spherical joint formed by the ball-head connecting rod and the ball-and-socket seat enables self-centering of the valve plate, compensating for thermal deformation. A continuous sealing pressure is provided by a spring or annular disc spring. Quick maintenance is achieved through the inspection port. This device provides reliable sealing, adapts to high-temperature thermal cycling conditions, and is easy to operate and maintain.

Description

Technical Field

[0001] This invention belongs to the field of boiler ash removal technology, specifically relating to a tower-type furnace ash removal device. Background Technology

[0002] Tower-type boiler ash discharge mechanisms typically employ rigidly connected ash discharge gates, with a drive unit moving the valve plate reciprocating to open and close the discharge port. However, the boiler's internal operating temperature is extremely high, and the valve seat, valve plate, and shell at the ash discharge port are subjected to prolonged high temperatures and intense thermal cycling, making them prone to thermal expansion deformation and material dimensional changes. The rigidly connected valve plate cannot automatically adjust its angle to accommodate the displacement deviation of the valve seat caused by thermal deformation, resulting in a gap between the valve plate and the valve seat sealing surface. This leads to furnace air leakage and ash leakage, reducing boiler thermal efficiency and polluting the environment. Furthermore, when the valve plate becomes stuck due to thermal deformation or ash accumulation, the rigid connection structure directly subjects the drive unit to the jamming reaction force, easily causing drive rod bending, bearing damage, or even drive unit overload. Additionally, the sealing gaskets of existing ash discharge mechanisms are mostly non-removable structures, requiring complete disassembly and replacement after long-term wear, resulting in high maintenance difficulty and long downtime. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a tower-type furnace slag discharge device that can adjust the angle of the valve plate to accommodate displacement deviations in the valve seat caused by thermal deformation.

[0004] The tower-type slag discharge device of this invention includes:

[0005] The shell has a connecting hole that communicates with the slag discharge port of the tower furnace; A drive shaft, which is slidably disposed within the housing; A valve plate is disposed in the housing and is connected to the drive shaft; A valve seat, which is disposed in the housing, is annular and communicates with the connecting hole; A sealing bushing is disposed on the side of the valve plate near the valve seat, and the sealing bushing is used to be inserted into the valve seat; The drive shaft drives the valve plate to reciprocate within the housing, thereby separating and engaging the valve plate with the valve seat.

[0006] In some embodiments, the shell is provided with a discharge hole for discharging slag from the shell.

[0007] In some embodiments, the drive shaft extends through the housing in a direction away from the valve plate, and the extended end of the drive shaft is connected to a drive device for driving the drive shaft to reciprocate within the housing.

[0008] In some embodiments, the housing has a through hole, through which the drive shaft passes out of the housing. A sealed bearing is provided in the through hole and is sleeved on the drive shaft.

[0009] In some embodiments, the housing is provided with an access port, which is positioned corresponding to the valve plate and the sealing bushing, and an access cover is detachably connected to the access port.

[0010] In some embodiments, the valve plate is clearance-fitted with the inner wall of the housing.

[0011] In some embodiments, the sealing bushing is made of a high-temperature resistant and wear-resistant material, and the sealing bushing is detachably connected to the valve plate.

[0012] In some embodiments, the tower furnace slag discharge device further includes a ball-head connecting rod and a ball-shaped socket seat. One end of the ball-head connecting rod is connected to the drive shaft, the ball-shaped socket seat is disposed on the side of the valve plate near the drive shaft, and the other end of the ball-head connecting rod is rotatably connected in the ball-shaped socket seat.

[0013] In some embodiments, the tower furnace slag discharge device further includes a plurality of springs connected between the valve seat and the inner wall of the housing, the plurality of springs being spaced apart in a circumferential direction.

[0014] In some embodiments, the extension end of the drive shaft is provided with threads to facilitate connection between the drive shaft and the drive device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the usage state of the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure of the shell in this invention. Figure 1 .

[0018] Figure 4 This is a schematic diagram of the internal structure of the shell in this invention. Figure 2 .

[0019] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0020] Figure label: 1. Housing; 11. Connecting hole; 12. Drain hole; 13. Inspection port; 14. Inspection cover; 2. Drive shaft; 3. Ball joint; 4. Valve plate; 5. Ball-and-socket seat; 6. Valve seat; 7. Spring; 8. Sealing bushing. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figures 1-5 As shown, the tower furnace slag discharge device of this embodiment includes a housing 1, a drive shaft 2, a valve plate 4, a valve seat 6, and a sealing bushing 8. A connecting hole 11 is provided on the housing 1, communicating with the slag discharge port of the tower furnace. The drive shaft 2 is slidably disposed within the housing 1, and the valve plate 4 is disposed within the housing 1 and connected to the drive shaft 2. The valve seat 6 is disposed within the housing 1, and the valve seat 6 is annular, communicating with the connecting hole 11. The sealing bushing 8 is disposed on the side of the valve plate 4 near the valve seat 6, and is inserted into the valve seat 6. The drive shaft 2 drives the valve plate 4 to reciprocate within the housing 1, causing the valve plate 4 to separate and engage with the valve seat 6.

[0023] The tower-type boiler ash discharge device of this invention uses a drive shaft to reciprocate a valve plate, thereby opening and closing the ash discharge port and completing the boiler ash discharge operation. A sealing bushing on the valve plate inserts into the valve seat to form a sealing fit, effectively preventing ash leakage and cold air ingress, thus improving the sealing reliability of the ash discharge mechanism. Simultaneously, the components work collaboratively, resulting in a compact structure and strong adaptability, facilitating subsequent operation and maintenance.

[0024] Specifically, the shell 1 serves as the mounting carrier for the entire ash removal device, providing stable mounting support for all components such as the drive shaft 2, valve plate 4, and valve seat 6. It also seals the area around the boiler ash discharge port to prevent ash leakage and cold air ingress. A connection hole 11 is provided on the shell 1 for communication with the ash discharge port of the tower furnace, allowing ash from the furnace to enter the shell 1 through the connection hole 11. A discharge hole 12 is also provided on the shell 1 to discharge ash from the shell 1, thus achieving the ash removal function. In operation, ash enters the shell 1 from the tower furnace ash discharge port through the connection hole 11, and is then discharged through the discharge hole 12 to the external ash conveying system, completing the entire ash removal process.

[0025] In some embodiments, the drive shaft 2 extends through the housing 1 in a direction away from the valve plate 4. A drive device is connected to the extended end of the drive shaft 2, which drives the drive shaft 2 to reciprocate within the housing 1. In use, the drive device generates linear reciprocating force, causing the drive shaft 2 to slide within the housing 1, thereby driving the valve plate 4 closer to or away from the valve seat 6, thus closing and opening the slag discharge port. The drive device can be a pneumatic cylinder, hydraulic cylinder, or electric actuator, selected according to the site conditions and control precision requirements. When the drive device moves the drive shaft 2 into the housing 1, the valve plate 4 approaches the valve seat 6, the sealing bushing 8 is inserted into the valve seat 6, and the slag discharge port is closed. When the drive device moves the drive shaft 2 out of the housing 1, the valve plate 4 moves away from the valve seat 6, the sealing bushing 8 is pulled out of the valve seat 6, the slag discharge port opens, and ash is discharged from the discharge hole 12.

[0026] Furthermore, a through hole is provided on the housing 1, through which the drive shaft 2 passes and exits the housing 1. A sealed bearing is installed in the through hole and is fitted onto the drive shaft 2. During use, the sealed bearing ensures that the drive shaft 2 can move flexibly back and forth, reducing frictional loss during movement, while also sealing the gap between the drive shaft 2 and the housing 1, preventing ash, slag, and hot gas from leaking out of the furnace. It also prevents external dust and cold air from entering the housing 1 and damaging components. The inner ring of the sealed bearing is interference-fitted with the drive shaft 2, and the outer ring is interference-fitted with the inner wall of the through hole. The bearing is filled with high-temperature resistant grease to adapt to the high-temperature environment around the boiler. A sealed bearing with a dust cover can also be used to further enhance dust and slag prevention capabilities.

[0027] Furthermore, the extension end of drive shaft 2 is threaded to facilitate connection between drive shaft 2 and the drive unit. Specifically, the extension end of drive shaft 2 is machined with external threads, and the output end of the drive unit is provided with internal threads or a threaded connecting sleeve, achieving quick connection between the two through threaded engagement. Threaded connections offer advantages such as simple structure, easy assembly and disassembly, and high load-bearing capacity, facilitating on-site installation and subsequent maintenance. In some alternative solutions, drive shaft 2 and the drive unit can also be connected via a coupling to accommodate different output configurations of the drive unit.

[0028] In some embodiments, the valve plate 4 is clearance-fitted with the inner wall of the housing 1. Specifically, the outer diameter of the valve plate 4 is smaller than the diameter of the inner cavity of the housing 1. During use, this clearance fit design ensures smooth movement of the valve plate 4 within the housing 1, preventing jamming due to machining errors or thermal expansion. Simultaneously, the clearance fit allows the valve plate 4 to undergo a small angular deflection under the action of the spherical joint structure, enabling self-centering with the ball-end connecting rod 3. The size of the clearance can be optimized according to the specifications and dimensions of the slag discharge device and the operating temperature; higher temperatures and larger component sizes require a correspondingly larger clearance.

[0029] In some embodiments, the sealing bushing 8 is made of a high-temperature resistant and wear-resistant material, and is detachably connected to the valve plate 4. Specifically, the sealing bushing 8 can be made of high-temperature alloys, ceramic composite materials, graphite composite materials, or other special materials suitable for high-temperature and high-wear conditions, effectively resisting the erosion of ash and slag and high-temperature corrosion, not easily worn or aged, and maintaining good sealing performance for a long time. The sealing bushing 8 is cylindrical or conical, and its outer diameter is adapted to the inner diameter of the valve seat 6 so as to form a tight sealing fit when inserted into the valve seat 6. Through detachable connection methods, such as bolt connection, screw connection, or snap connection, the sealing bushing 8 becomes an independent modular wear part. During use, when the sealing bushing 8 wears or is damaged after long-term operation, the connecting parts can be directly disassembled for replacement without disassembling the entire slag discharge device, greatly reducing the difficulty and cost of operation and maintenance. The sealing surface of the sealing bushing 8 can be hardened or coated with a wear-resistant coating to further extend its service life.

[0030] In some embodiments, the slag discharge device further includes a ball-head connecting rod 3 and a ball-and-socket seat 5. One end of the ball-head connecting rod 3 is connected to the drive shaft 2, the ball-and-socket seat 5 is disposed on the side of the valve plate 4 near the drive shaft 2, and the other end of the ball-head connecting rod 3 is rotatably connected in the ball-and-socket seat 5. Specifically, a spherical joint is provided at the end of the ball-head connecting rod 3 near the valve plate 4, and a spherical groove adapted to the spherical joint is opened inside the ball-and-socket seat 5. The spherical joint is embedded in the spherical groove to form a spherical pair structure that can rotate at multiple angles, so that a non-rigid connection is formed between the ball-head connecting rod 3 and the valve plate 4. In use, the spherical joint can rotate freely in the spherical groove, allowing the valve plate 4 to deflect at multiple angles relative to the ball-head connecting rod 3. When the valve plate 4 approaches the valve seat 6 under the action of driving force, if the valve seat 6 or the housing 1 undergoes thermal expansion deformation due to high temperature, the spherical pair structure allows the valve plate 4 to automatically fine-tune the angle to achieve self-centering, ensuring that the sealing bushing 8 on the valve plate 4 can be accurately aligned and tightly fitted with the valve seat 6. This structure effectively solves the problem of valve plate and valve seat failing to fit properly due to thermal deformation in traditional rigid connections, preventing air leakage and ash / slag leakage. It also prevents valve plate jamming and sticking, improving the operational reliability and stability of the slag discharge device. Furthermore, the spherical joint structure can buffer the impact load between the drive shaft 2 and valve plate 4, reducing component wear and extending service life.

[0031] Furthermore, the ball joint connecting rod 3 and the drive shaft 2 can be connected by a threaded connection or a one-piece molding structure. When a threaded connection is used, the end of the ball joint connecting rod 3 is provided with an external thread, and the end of the drive shaft 2 is provided with an internal threaded hole. After the two are screwed together, they are fixed with a lock nut, which facilitates disassembly and fine-tuning of the length. The ball socket seat 5 and the valve plate 4 can be connected by welding, bolting, or one-piece casting to ensure the installation strength and positional accuracy of the ball socket seat 5.

[0032] In some embodiments, the slag discharge device further includes multiple springs 7 connected between the valve seat 6 and the inner wall of the housing 1, with the multiple springs 7 spaced apart circumferentially. Specifically, the springs 7 may be cylindrical helical compression springs, with one end abutting against the back of the valve seat 6 and the other end abutting against the inner wall of the housing 1. The valve seat 6 is not rigidly fixed to the inner wall of the housing 1, but is supported by the floating springs 7. During use, the springs 7 always apply elastic pressure to the valve seat 6 in the direction of the valve plate 4. When the valve plate 4 drives the sealing bushing 8 to insert into the valve seat 6, the valve seat 6 forms elastic contact with the sealing bushing 8 under the elastic force of the springs 7, compensating for gaps caused by thermal deformation or processing errors, and ensuring a tight seal. Under extreme thermal cycling conditions of the boiler, when metal parts expand and contract due to temperature changes, the springs 7 can provide continuous elastic pressure to compensate for dimensional changes, ensuring that the sealing surfaces are always tightly fitted, achieving a reliable seal. The multiple springs 7 are evenly spaced circumferentially, so that the valve seat 6 is subjected to uniform force and avoids skewing.

[0033] Furthermore, the number of springs 7 can be determined according to the diameter of the valve seat 6 and the required elastic force, and is usually set to 4, 6 or 8. A guide sleeve can be provided on the outside of the spring 7 to prevent the spring 7 from bending laterally and failing. In some alternatives, the spring 7 can also be a ring disc spring, which is sleeved on the outside or inside of the valve seat 6 to provide uniform circumferential pressure.

[0034] In some embodiments, a maintenance port 13 is provided on the housing 1, corresponding to the positions of the valve plate 4 and the sealing bushing 8, and a maintenance cover 14 is detachably connected to the maintenance port 13. Specifically, the maintenance port 13 is located on the side wall or end of the housing 1, and its opening size is larger than the outer diameter of the valve plate 4, facilitating the insertion of operators or maintenance tools into the housing 1. The maintenance cover 14 is connected to the housing 1 by bolts, clamps, or hinges, and a sealing gasket is provided at the connection surface to ensure the sealing performance when the maintenance port 13 is closed. In use, when it is necessary to periodically inspect, maintain, or replace easily worn parts such as the valve plate 4, the sealing bushing 8, the ball joint rod 3, and the ball socket seat 5, the maintenance cover 14 of the maintenance port 13 can be opened, and the operation can be performed directly through the maintenance port 13 without disassembling the entire housing 1 and the slag discharge device. For example, when the sealing bushing 8 wears out, the operator can disassemble the connection between the sealing bushing 8 and the valve plate 4 through the inspection port 13, remove the old sealing bushing 8, and install the new sealing bushing 8. The whole process is simple and quick. After maintenance, the inspection cover 14 is closed and the bolts are tightened to ensure reliable sealing and prevent air leakage and ash leakage during operation. This structure significantly reduces the difficulty and labor intensity of equipment operation and maintenance, shortens downtime, reduces operation and maintenance costs, and improves the overall economic efficiency of the slag discharge device.

[0035] Furthermore, reinforcing ribs can be provided around the inspection port 13 to compensate for the weakening effect of the opening on the strength of the housing 1. An observation window can be provided on the inspection cover 14 to facilitate observation of the working status and component wear inside the housing 1 without opening the inspection cover 14.

[0036] Furthermore, a wear-resistant sealing gasket can be provided on the side of the valve seat 6 facing the valve plate 4. The wear-resistant sealing gasket is made of high-temperature and wear-resistant material and can be detachably fixed to the valve seat 6 by bolts, forming a modular wear component structure. In use, the wear-resistant sealing gasket cooperates with the sealing bushing 8 or sealing step on the valve plate 4 to form a double seal, further enhancing the sealing performance. When the wear-resistant sealing gasket wears out, it can also be quickly replaced through the inspection port 13 without disassembling the valve seat 6.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A tower-type furnace slag discharge device, characterized in that, include: The shell (1) has a connecting hole (11) which is connected to the slag discharge port of the tower furnace; A drive shaft (2) is slidably disposed in the housing (1); Valve plate (4), the valve plate (4) is disposed in the housing (1), and the valve plate (4) is connected to the drive shaft (2); Valve seat (6), the valve seat (6) is disposed in the housing (1), the valve seat (6) is annular, and the valve seat (6) communicates with the connecting hole (11); A sealing bushing (8) is disposed on the side of the valve plate (4) near the valve seat (6) and is used to be inserted into the valve seat (6). The drive shaft (2) drives the valve plate (4) to reciprocate within the housing (1) so that the valve plate (4) separates from and fits against the valve seat (6).

2. The tower-type slag discharge device according to claim 1, characterized in that, The shell (1) is provided with a discharge hole (12) for discharging slag from the shell (1).

3. The tower-type slag discharge device according to claim 1, characterized in that, The drive shaft (2) extends out of the housing (1) in a direction away from the valve plate (4). The extended end of the drive shaft (2) is connected to a drive device, which is used to drive the drive shaft (2) to reciprocate within the housing (1).

4. The tower-type slag discharge device according to claim 3, characterized in that, The housing (1) has a through hole, and the drive shaft (2) passes through the through hole and exits the housing (1). A sealed bearing is provided in the through hole and is sleeved on the drive shaft (2).

5. The tower-type slag discharge device according to claim 1, characterized in that, The housing (1) is provided with an inspection port (13), which is located corresponding to the valve plate (4) and the sealing bushing (8), and an inspection cover (14) is detachably connected to the inspection port (13).

6. The tower-type slag discharge device according to claim 1, characterized in that, The valve plate (4) is fitted with the inner wall of the housing (1) with a clearance.

7. The tower-type slag discharge device according to claim 1, characterized in that, The sealing bushing (8) is made of high temperature and wear resistant material, and the sealing bushing (8) is detachably connected to the valve plate (4).

8. The tower-type slag discharge device according to claim 1, characterized in that, It also includes a ball joint (3) and a ball socket (5). One end of the ball joint (3) is connected to the drive shaft (2), and the ball socket (5) is disposed on the side of the valve plate (4) near the drive shaft (2). The other end of the ball joint (3) is rotatably connected in the ball socket (5).

9. The tower-type slag discharge device according to claim 1, characterized in that, It also includes a plurality of springs (7) connected between the valve seat (6) and the inner wall of the housing (1), and the plurality of springs (7) are spaced apart along the circumferential direction.

10. The tower-type slag discharge device according to claim 4, characterized in that, The extension end of the drive shaft (2) is provided with a thread so that the drive shaft (2) can be connected to the drive device.

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