A boiler ash discharge pipe anti-clogging device and its application

Abstract

The application provides a boiler slag discharge pipe anti-blocking device, which comprises a mounting plate and a blocking plate, the blocking plate is provided with a fixing shaft, the mounting plate is provided with a mounting hole, the upper side of the mounting plate is provided with a rotating sleeve corresponding to the mounting hole, and the outer part of the upper end of the fixing shaft protruding from the rotating sleeve is provided with a driving mechanism; the upper side of the blocking plate is provided with a blocking table corresponding to the slag discharge hole; the driving mechanism comprises an operating frame, the operating frame comprises two connecting plates, a horizontal shaft and a fixing rod are installed between the two connecting plates; the horizontal shaft is rotationally connected with the connecting hole, the two ends of the horizontal shaft are fixed with the corresponding connecting plates, and cams are fixed on the outer sides of the two connecting plates; the lower edge of the cam abuts against the upper surface of the mounting plate, alignment limiting grooves corresponding to the rotating sleeve are arranged on the upper surface of the mounting plate on the two sides of the rotating sleeve, and functional grooves are arranged on the edges of the alignment limiting grooves away from the slag discharge hole. The blocking plate can be driven to be opened or closed by pulling the operating handle at a long distance, and the operation is safe, time-saving and labor-saving.

Description

Technical Field

[0001] This invention belongs to the field of boiler slag discharge pipe anti-clogging technology, and in particular relates to a boiler slag discharge pipe anti-clogging device and its application. Background Technology

[0002] In the actual operation of fluidized bed boilers, raw coal, after exiting the pulverizer, enters the furnace for combustion with a certain wide particle size distribution. The fine particles formed during combustion enter the tail flue as fly ash and exit the boiler, while larger particles leave the bed at high temperature, forming bottom ash. Early fluidized bed boilers, due to their small capacity and low ash discharge, generally used direct discharge of high-temperature bottom ash. However, as boiler capacity has increased, the amount of bottom ash discharged has also grown significantly. Direct discharge is not only environmentally unfriendly but also causes substantial heat loss. Therefore, for cleaner production and heat recovery, bottom ash coolers have gradually been widely used in various types of fluidized bed boilers. Consequently, a ash removal system needs to be designed between the fluidized bed boiler and the ash cooler. Traditional ash removal systems are cumbersome, time-consuming, labor-intensive, and pose significant safety hazards. Although patent CN203533546U discloses a fluidized bed boiler ash removal system that can seal the ash removal pipe opening using a gate, its operation is limited. Workers need to operate near the pipe, making them susceptible to burns from the high-temperature slag. Furthermore, if slag interferes, the gate may not seal properly, leading to ash leakage. Patent CN217684968U discloses a ash removal device for a boiler cooler ash removal hole, which requires an additional electrical control system. This is not only costly and has limited application, but its reliability is also difficult to guarantee under high-temperature environments and the influence of splashing slag. Therefore, it is necessary to improve the sealing device portion of the existing ash removal system. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a boiler ash discharge pipe anti-clogging device and its application.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] A boiler ash discharge pipe anti-clogging device includes an mounting plate fixed to the ash discharge pipe, a sealing plate corresponding to the lower part of the mounting plate, a fixed shaft on the sealing plate, a mounting hole on the mounting plate, and a rotating sleeve on the upper side of the mounting plate corresponding to the mounting hole. One end of the fixed shaft passing through the mounting hole engages with the rotating sleeve, and a driving mechanism is installed on the upper end of the fixed shaft protruding from the rotating sleeve. The mounting plate has an ash discharge hole corresponding to the ash discharge pipe, and the upper side of the sealing plate has a sealing platform corresponding to the ash discharge hole. The upper surface of the sealing platform is arranged at an angle, and its upper surface gradually decreases from the side away from the fixed shaft to the side closer to the fixed shaft. The driving mechanism includes an operating frame, which includes two parallel connecting plates. A horizontal shaft and a fixed rod are installed between the two connecting plates. The horizontal shaft is located below the fixed rod and passes through the connecting hole at the upper end of the fixed shaft. The horizontal shaft rotatably engages with the connecting hole. At the same time, both ends of the horizontal shaft are fixed to the corresponding connecting plates and are located on the outer side of the two connecting plates. Each cam is fixed in place; the lower edge of the cam abuts against the upper surface of the mounting plate, and on the upper surface of the mounting plate, on both sides of the corresponding rotating sleeve, there are alignment limiting grooves that can cooperate with the cams. On the edge of the alignment limiting groove away from the slag discharge hole, there is a functional groove. The width of the functional groove is greater than the width of the alignment limiting groove, and the depth of the functional groove is less than the depth of the alignment limiting groove. An operating handle is fixed on the fixing rod. The arc-shaped part of the lower edge of the cam includes a constant diameter section and a variable diameter section. The constant diameter section accounts for 1 / 4 to 1 / 3 of the total arc length of the arc-shaped part of the cam, and the remaining part is a variable diameter section. The variable diameter section includes at least 5 arc-shaped structures, and the radius of each arc-shaped structure decreases step by step from the side of the constant diameter section to the side away from the constant diameter section. The decrease in each step is 3% to 5% of the diameter of the constant diameter section. After the cams on the outer sides of the two connecting plates are respectively engaged in the corresponding alignment limiting grooves, when the operating handle is pressed down, the sealing plate is attached to the mounting plate, and the mounting hole of the mounting plate is blocked by the sealing platform.

[0006] Furthermore, the sealing platform is conical, with its smaller diameter end facing the mounting plate.

[0007] Furthermore, the inner diameter of the rotating sleeve is 1-3mm larger than the inner diameter of the mounting hole, ensuring a stable fit between the fixed shaft and the rotating sleeve, reducing the machining precision of the mounting plate, and lowering the manufacturing cost.

[0008] Furthermore, the two ends of the horizontal shaft extend outward to the corresponding connecting plates, and the part extending outward to the connecting plates is provided with a threaded connection part. The upper part of the cam is provided with a fixing hole, the threaded connection part passes through the fixing hole, and the cam is locked by a locking member.

[0009] Furthermore, the slag discharge hole has a conical hole structure, and there is an adjustment gap of 2-5mm between the conical outer wall surface of the sealing platform and the inner wall of the slag discharge hole.

[0010] Furthermore, the adjustment gap decreases sequentially from top to bottom.

[0011] Furthermore, the sealing plate is the same size as the mounting plate.

[0012] A method for unblocking pipes using the aforementioned anti-clogging device includes the following steps:

[0013] Lift the operating handle to rotate the equal diameter section of the lower edge of the cam out of the alignment limit groove, while the larger diameter part of the variable diameter section close to the equal diameter section aligns with the alignment limit groove. At this time, the connection position of the equal diameter section and the variable diameter section abuts against the functional groove at the edge of the alignment limit groove, causing the lower edge of the cam to disengage from the alignment limit groove.

[0014] Continue to lift the operating handle so that the smaller diameter part of the variable diameter section, which is away from the equal diameter section, abuts against the functional groove at the edge of the aligning limit groove. As the radius of the arc structure of the part of the variable diameter section in contact with the functional groove decreases, the sealing plate gradually moves down, thereby causing the sealing platform to detach from the slag discharge hole.

[0015] Rotate the operating handle horizontally to make the operating frame rotate, which in turn drives the fixed shaft to rotate. The sealing plate rotates synchronously with the fixed shaft and detaches from the mounting plate, exposing the slag discharge hole.

[0016] Use tools such as sticks, rods, or wires to insert into the slag discharge pipe to clear it;

[0017] After clearing the slag discharge pipe, rotate the operating handle horizontally in the opposite direction to gradually return the sealing plate to its original position. When the lower edge of the cam is close to the alignment limit groove, press down the operating handle to change the contact position between the lower edge of the cam and the functional groove from the variable diameter section to the equal diameter section. At this time, the sealing plate gradually moves upward and the sealing platform gradually extends into the slag discharge hole, thereby sealing the slag discharge hole.

[0018] Continue pressing down the operating handle until the equal-diameter section of the lower edge of the cam is engaged in the alignment limiting groove, so that the equal-diameter section is stably engaged with the bottom of the alignment limiting groove.

[0019] Furthermore, the center of the bottom of the alignment limiting groove is provided with an arc-shaped mating section to achieve surface contact rather than line contact between the lower edge of the cam and the alignment limiting groove, thereby improving structural stability.

[0020] Compared with existing technologies, the present invention has the following advantages:

[0021] The invention features a reasonable structural design. The sealing plate can be opened or closed by remotely turning the operating handle. It is safe to operate, saves time and effort, and the sealing plate has high stability during the opening and closing process relative to the mounting plate. It will not interfere with the plate. In the closed state, the sealing plate and the mounting plate have a high degree of connection, which can minimize slag leakage. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure created by this invention;

[0024] Figure 2 This is a schematic diagram of the sealing plate in the open state in the present invention.

[0025] Figure 3 This is a schematic diagram of the cam structure in the present invention;

[0026] Figure 4 This is a schematic diagram of the sealing plate in the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the fixed shaft in this invention;

[0028] Figure 6 A top view of the sealing plate in this invention;

[0029] Figure 7 This is a schematic diagram of the sealing plate having a fixed shaft in the present invention;

[0030] Figure 8 This is a schematic diagram of the mounting plate in this invention.

[0031] Figure 9 for Figure 8 Top view;

[0032] Figure 10 This is a schematic diagram of a sealing plate with a dividing channel groove in the present invention. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] A boiler ash discharge pipe anti-clogging device, such as Figures 1 to 9 As shown, the system includes a mounting plate 2 fixed to the slag discharge pipe 1, a sealing plate 3 located below the mounting plate, a fixing shaft 4 on the sealing plate, mounting holes 5 on the mounting plate, and a rotating sleeve 6 on the upper side of the mounting plate corresponding to the mounting holes. Typically, a groove or through hole is provided on the sealing plate as a mounting position 20 for the fixing shaft. After the fixing shaft is inserted into the mounting position, it is fixed by welding. One end of the fixing shaft passing through the mounting hole mates with the rotating sleeve, and a drive mechanism is installed on the portion of the fixing shaft protruding from the rotating sleeve at its upper end. The mounting plate has a slag discharge hole 7 corresponding to the slag discharge pipe, and a sealing platform 8 is provided on the upper side of the sealing plate corresponding to the slag discharge hole.

[0038] The upper surface of the sealing plate is arranged at an angle, and its upper surface gradually decreases from the side away from the fixed axis to the side closer to the fixed axis. This can effectively avoid interference between the sealing plate and the mounting plate while maximizing the distance between them. The driving mechanism includes an operating frame, which includes two parallel connecting plates 9. A horizontal shaft 10 and a fixed rod 11 are installed between these two connecting plates. The horizontal shaft is located below the fixed rod and passes through the connecting hole 12 at the upper end of the fixed shaft, and the horizontal shaft is rotatably engaged with the connecting hole.

[0039] Meanwhile, the two ends of the horizontal shaft are fixed to the corresponding connecting plates respectively, and cams 13 are fixed on the outer sides of the two connecting plates respectively; the lower edge of the cam abuts against the upper surface of the mounting plate, and the upper surface of the mounting plate is provided with alignment limiting grooves 14 that can cooperate with the cams on both sides of the rotating sleeve, and a functional groove 15 is provided on the edge of the alignment limiting groove away from the slag discharge hole. The width of the functional groove is greater than the width of the alignment limiting groove, and the depth of the functional groove is less than the depth of the alignment limiting groove.

[0040] An operating handle 16 is fixed to the vertical fixing rod. It should be noted that an additional force rod can be installed on the outside of the operating handle, which makes it easier to operate from a distance, improves safety, and saves a lot of effort. After the cams on the outside of the two connecting plates are respectively engaged in the corresponding alignment limit grooves, when the operating handle is pressed down, the sealing plate and the mounting plate are in contact, and the mounting hole of the mounting plate is blocked by the sealing platform. The arc-shaped part of the lower edge of the cam includes a constant diameter section 17 and a variable diameter section 18. The constant diameter section accounts for 1 / 4 to 1 / 3 of the total arc length of the arc-shaped part of the cam, and the rest is a variable diameter section. The variable diameter section includes at least 5 arc-shaped structures, and the radius of each arc-shaped structure decreases step by step from the side of the constant diameter section to the side away from the constant diameter section. The decrease in each step is 3% to 5% of the diameter of the constant diameter section.

[0041] Typically, the aforementioned sealing platform is conical, with its smaller diameter end facing the mounting plate. This facilitates the closing and opening of the sealing plate and prevents interference between the sealing platform and the slag discharge hole. The inner diameter of the aforementioned rotating sleeve is 1-3mm larger than the inner diameter of the mounting hole, ensuring a stable fit between the fixed shaft and the rotating sleeve. This reduces the machining precision required for the mounting plate and lowers manufacturing costs.

[0042] The horizontal shaft has corresponding connecting plates extending outwards at both ends, and threaded connections are provided on the portions extending outwards from the connecting plates. A fixing hole is provided on the upper part of the cam, through which the threaded connection passes and is locked by a locking member 19. In an optional embodiment, the slag discharge hole has a conical structure, and there is a 2-5mm adjustment gap between the conical outer wall surface of the sealing platform and the inner wall of the slag discharge hole. The adjustment gap decreases sequentially from top to bottom for easy assembly and disassembly. Alternatively, the locking member can be spot-welded to the cam to ensure structural stability. Typically, the sealing plate and the mounting plate are the same size.

[0043] A method for unblocking pipes using the aforementioned anti-clogging device includes the following steps:

[0044] Lift the operating handle upwards (or rotate it along the fixed rod) to make the equal diameter section of the lower edge of the cam (larger diameter) rotate out of the alignment limit groove, while the variable diameter section (the larger diameter part close to the equal diameter section) aligns with the alignment limit groove. At this time, the connection position of the equal diameter section and the variable diameter section abuts against the functional groove at the edge of the alignment limit groove, causing the lower edge of the cam to disengage from the alignment limit groove.

[0045] Continue to lift the operating handle so that the variable diameter section (the smaller diameter part away from the equal diameter section) abuts against the functional groove at the edge of the aligning limit groove. As the radius of the arc structure of the part in contact with the functional groove decreases, the sealing plate gradually moves down, thereby causing the sealing platform to detach from the slag discharge hole.

[0046] Rotate the operating handle horizontally to make the operating frame rotate, which in turn drives the fixed shaft to rotate. The sealing plate rotates synchronously with the fixed shaft and detaches from the mounting plate, exposing the slag discharge hole.

[0047] Use tools such as sticks, rods, or wires to insert into the slag discharge pipe to clear it;

[0048] After clearing the slag discharge pipe, rotate the operating handle horizontally in the opposite direction to gradually return the sealing plate to its original position. When the lower edge of the cam is close to the alignment limit groove, press down the operating handle to change the contact position between the lower edge of the cam and the functional groove from the variable diameter section to the equal diameter section. At this time, the sealing plate gradually moves upward and the sealing platform gradually extends into the slag discharge hole, thereby sealing the slag discharge hole.

[0049] Continue pressing down the operating handle until the equal-diameter section of the lower edge of the cam engages with the alignment limiting groove, ensuring a stable connection between the equal-diameter section and the bottom of the alignment limiting groove. During the rotation and adjustment of the sealing plate, the inclined sealing platform and the mounting plate can grind the slag. After the cam is aligned with the alignment limiting groove, the sealing platform is fully in place. Even if the slag is squeezed between the sealing platform and the slag discharge hole, it will not affect the sealing of the anti-blocking device. Furthermore, the slag squeezed between the sealing platform and the slag discharge hole also effectively seals the area.

[0050] The aforementioned alignment limiting groove has an arc-shaped mating section at the center of its bottom to achieve surface contact rather than line contact between the lower edge of the cam and the alignment limiting groove, thus improving structural stability. This structural design effectively ensures that the cam can smoothly move when the operating handle is rotated, allowing it to smoothly exit the alignment limiting groove when the sealing plate is opened and smoothly return to the alignment limiting groove when the sealing plate needs to be closed.

[0051] Since this anti-clogging device is used for boiler ash discharge, no precision structural design is required, allowing for a small gap (generally 0.5-2mm) between the sealing plate and the mounting plate. This structural design prevents large-scale ash leakage (even if a very small amount of ash leaks out, it will not splash into safe areas outside the boiler facilities and is within a controllable range), while improving the smoothness of the sealing plate's opening and closing, avoiding situations where interference prevents closure and affects the normal operation of the boiler. In an optional embodiment, such as... Figure 10 As shown, the upper surface of the sealing plate has a dividing channel groove 21 located around the sealing platform. The dividing channel groove is arranged in a ring shape around the sealing platform. The dividing channel groove is 5-10mm wide and 3-5mm deep.

[0052] During the opening and closing of the sealing plate, slag is allowed to enter the partition channel groove. This not only prevents the slag from causing jamming during the sealing plate's movement, but also seals the gap between the sealing plate and the mounting plate. The annular partition channel groove effectively "collects" the slag, improving the bonding between the sealing plate and the mounting plate and minimizing slag leakage. Especially when slag remains in the partition channel groove for a long time, larger slag particles are squeezed and embedded into the existing slag during the sealing plate's rotation and adjustment, forming a "fence"-like interception structure in different areas of the partition channel groove. This effectively prevents slag overflow under normal boiler (slag discharge pipe) operation.

[0053] The invention features a reasonable structural design. The sealing plate can be opened or closed by remotely turning the operating handle. It is safe to operate, saves time and effort, and the sealing plate has high stability during the opening and closing process relative to the mounting plate. It will not interfere with the plate. In the closed state, the sealing plate and the mounting plate have a high degree of connection, which can minimize slag leakage.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A boiler slagging pipe anti-blocking device, characterized in that: The installation plate is fixed on the slag discharge pipe, and a blocking plate is arranged below the installation plate. One end of the fixed shaft passes through the installation hole and cooperates with the rotating sleeve, and the part of the fixed shaft protruding outside the upper end of the fixed shaft is provided with a driving mechanism. The installation plate is provided with a slag discharge hole corresponding to the slag discharge pipe, and the upper side of the blocking plate is provided with a blocking table corresponding to the slag discharge hole. The upper end surface of the blocking table is arranged in a slope, and the upper end surface gradually decreases from the side away from the fixed shaft to the side close to the fixed shaft. The driving mechanism includes an operating frame, which includes two parallel connection plates.

2. A boiler slag pipe anti-blocking device according to claim 1, characterized in that: The horizontal shaft is located below the fixed rod and passes through the connecting hole in the upper end of the fixed shaft.

3. A boiler slagging pipe anti-blocking device according to claim 1, characterized in that: The horizontal shaft is rotatably connected with the connecting hole, and the two ends of the horizontal shaft are fixed with the corresponding connection plates.

4. A boiler slagging pipe anti-blocking device according to claim 1, characterized in that: The lower edge of the cam abuts against the upper surface of the installation plate.

5. A boiler slagging pipe anti-blocking device according to claim 2, characterized in that: The upper surface of the installation plate is provided with alignment limiting grooves corresponding to the two sides of the rotating sleeve.

6. A boiler slagging pipe anti-blocking device according to claim 5, characterized in that: The edge of the alignment limiting groove away from the slag discharge hole is provided with a functional groove with a width greater than that of the alignment limiting groove and a depth less than that of the alignment limiting groove.

7. A boiler slagging pipe anti-blocking device according to claim 1, characterized in that: The fixed rod is fixed with an operating handle.

8. A method for pipe dredging using the anti-blocking device of claim 1, characterized in that, The arc-shaped part of the lower edge of the cam includes a constant-diameter section and a variable-diameter section. The constant-diameter section accounts for 1 / 4-1 / 3 of the total arc length of the cam arc-shaped part. The remaining part is the variable-diameter section, which includes at least 5 arc-shaped structures. The radius of each arc-shaped structure gradually decreases from one side of the constant-diameter section to the side away from the constant-diameter section. When the cams on the outer sides of the two connection plates are clamped into the corresponding alignment limiting grooves, the blocking plate is attached to the installation plate, and the blocking table blocks the slag discharge hole of the installation plate. The blocking table is conical, with the small-diameter end facing the side of the installation plate. The inner diameter of the rotating sleeve is greater than the inner diameter of the installation hole. The two ends of the horizontal shaft respectively protrude out of the corresponding connection plates. The upper part of the cam is provided with a fixed hole. The threaded connection part passes through the fixed hole and locks the cam through a locking piece. The slag discharge hole is in a conical hole structure. The conical outer wall surface of the blocking table and the inner wall of the slag discharge hole have an adjustment gap of 2-5 mm. The adjustment gap gradually decreases from top to bottom. The blocking plate is the same size as the installation plate. The method includes the following steps: Lift the operating handle upward to make the constant-diameter section of the lower edge of the cam rotate out of the alignment limiting groove, and the variable-diameter section corresponds to the alignment limiting groove. At this time, the constant-diameter section and the variable-diameter section are connected at the junction position, which abuts against the functional groove at the edge of the alignment limiting groove, so that the lower edge of the cam is separated from the alignment limiting groove. Continue to lift the operating handle to make the variable-diameter section abut against the functional groove at the edge of the alignment limiting groove. As the radius of the arc-shaped structure of the contact part of the variable-diameter section and the functional groove decreases, the blocking plate gradually moves downward, so that the blocking table is separated from the slag discharge hole. Horizontally rotate the operating handle to rotate the operating frame, thereby driving the fixed shaft to rotate. The blocking plate rotates synchronously with the fixed shaft and is separated from the installation plate, exposing the slag discharge hole. Use a tool to extend into the slag discharge pipe for dredging operation. After dredging the slag discharge pipe, reverse horizontally rotate the handle, so that the blocking plate gradually returns to the original position, when the lower edge of the cam approaches the alignment limit groove, press down the handle, so that the contact position of the lower edge of the cam and the functional groove changes from the variable diameter section to the constant diameter section, at this time the blocking plate gradually moves up, the blocking platform gradually extends into the slag discharge hole, and further blocks the slag discharge hole; Until the constant diameter section of the lower edge of the cam is clamped into the alignment limit groove, and then continue to press down the handle, so that the constant diameter section is combined with the groove bottom of the alignment limit groove stably.

9. A method of pipe de-clogging according to claim 8, wherein: The groove bottom of the alignment limit groove is provided with an arc-shaped matching section in the middle.

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