Ash bucket access door for dust remover
By introducing a sealing gasket and dust cover assembly into the ash hopper inspection door, the problem of condensation and dust accumulation caused by incomplete coverage of the insulation layer is solved, achieving a more efficient insulation effect and convenient opening, and reducing the risk of explosion of the equipment.
Patent Information
- Application Number
- CN202422049312.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The insulation layer of the existing ash hopper inspection door cannot be fully covered, resulting in condensation and dust accumulation, which increases the risk of explosion of the equipment. At the same time, the high height of the door frame affects the convenience of opening.
An ash hopper inspection door including a sealing gasket and a dust cover assembly is designed to enhance the thermal insulation effect, reduce heat exchange opportunities, and reduce the possibility of condensation and dust accumulation. It can also be opened conveniently through a limit assembly and a rotating assembly.
It effectively reduces the possibility of condensation and dust accumulation, improves the safety and opening convenience of the equipment, and reduces the risk of equipment explosion.
Smart Images
Figure CN223311818U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inspection doors, and in particular relates to an ash hopper inspection door for a dust collector. Background Art
[0002] Currently, pulverized coal, the primary fuel for clinker production in cement plants, is processed through a pulverized coal preparation system. Because pulverized coal is flammable and explosive, all equipment in this system presents a risk of explosion, including dust collection equipment. In new dry-process cement production lines, exhaust gas from the coal mill cannot be entirely discharged into the kiln; instead, dust collection and ventilation are necessary. Currently, bag filters for coal mills are widely used. In this case, the exhaust gas and dust from the coal mill are inevitably flammable and explosive.
[0003] Coal mill exhaust gas temperatures typically range from 60°C to 80°C, with a dew point of 40°C to 50°C. Dust-laden gas enters the bag filter directly, where dust concentrations typically reach 500-800g / Nm³, representing a high dust concentration. The operating negative pressure of some dust collectors can reach as high as 8,000-14,000 Pa. Freshly pulverized coal has a density of approximately 0.5t / m³, making it relatively light. The dust is fine, typically less than 0.1mm (40% to 80% of the weight of dust is less than 10μm), making it prone to spontaneous combustion and explosion. The large surface area of the dust makes it highly explosive.
[0004] For combustion and explosion to occur, three conditions must be present simultaneously: combustible materials, sufficient oxygen, and an ignition source. Dust collector design must fully consider flame and explosion prevention. Because bag filters operate under negative pressure, they place higher demands on the sealing performance of the housing and various doors to prevent air leakage from entering the dust collector, which could increase oxygen levels and lead to spontaneous combustion and explosion. Dust collector insulation requires not only an insulation layer for the housing, but also for manholes, inspection doors, and explosion-proof doors. This prevents high-temperature, humid gases from meeting the cold exterior of the housing, causing condensation on the hot and cold contact surfaces of the wall panels, resulting in coal dust sticking together and accumulating on the wall panels. Furthermore, the dust collector must be free of dust accumulation spots, dead corners, or surfaces where dust can accumulate.
[0005] In current technology, in order to ensure the insulation effect near the ash hopper inspection door and prevent condensation on the inner wall, and to ensure full coverage of the insulation layer, sufficient height space must be reserved. A height space of 150mm is reserved for the ash hopper inspection door frame to ensure that the door frame is fully covered by the insulation layer.
[0006] The doorframe of the ash hopper access door is relatively high. The taller the doorframe, the greater the likelihood and volume of dust accumulation within the straight section of the doorframe, posing a greater risk to the equipment. If the doorframe height is reduced, the insulation thickness will not be sufficient, and the wall panels will be susceptible to condensation and dust accumulation. While increasing the thickness of the insulation layer inside the access door can reduce dust accumulation, this increase is limited, and the ability to open the access door must also be considered. This still leaves a significant amount of dust accumulation space, creating the potential for dust accumulation. To allow for swinging clearance for the access door, a portion of the current doorframe extends beyond the hopper panel insulation, preventing full insulation coverage. Utility Model Content
[0007] In view of this, the main purpose of the present invention is to provide an ash hopper inspection door for a dust collector.
[0008] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:
[0009] Embodiment 1 of the present invention provides an ash hopper inspection door for a dust collector, comprising an ash hopper, a dust cover assembly, a rotating assembly, a sealing assembly, a limiting assembly, a door frame assembly, an inspection door assembly, and a locking assembly. The door frame assembly is arranged on the ash hopper, the limiting assembly is arranged on the inner wall of the door frame assembly, the dust cover assembly is arranged at the inner end of the door frame assembly through the rotating assembly, the dust cover assembly and the ash hopper are sealed by a sealing assembly, the inspection door assembly is arranged at the outer end of the door frame assembly, and the locking assembly is arranged on the outer wall of the door frame assembly for locking the inspection door assembly.
[0010] In the above solution, the ash hopper includes an ash hopper shell, an insulation layer, and a flange. The insulation layer is arranged on the outer wall of the ash hopper shell, and the flange is arranged at the lower part of the ash hopper shell.
[0011] In the above solution, the door frame assembly includes a door frame, and the door frame is arranged on the inspection hole opened in the ash hopper shell.
[0012] In the above scheme, the inspection door assembly includes insulating rock wool, an outer door cover, an inner door cover, and a sealing ring. The two ends of the inner door cover are connected to the two ends of the outer door cover, and insulating rock wool is arranged between the outer door cover and the inner door cover. A groove is provided on the edge of the outer door cover, and the sealing ring is arranged in the groove.
[0013] In the above solution, the locking assembly includes a hinge and a ring nut. One end of the hinge is connected to the door frame, and the other end of the hinge is connected to the outer door cover. The inspection door assembly is locked by the ring nut.
[0014] In the above solution, the limiting assembly includes two limiting round steel bars, which are respectively welded on the inner wall of the door frame and located at two symmetrical positions in the diameter direction of the door frame.
[0015] In the above solution, the dust cover assembly includes a dust cover plate, a reinforcement plate, and an elastic pressure plate, and the dust cover plate, the reinforcement plate, and the elastic pressure plate are sequentially connected through a rotating assembly.
[0016] In the above solution, the rotating assembly includes a bolt and a nut, and the bolt passes through the dust cover, the reinforcement plate and the elastic pressure plate in sequence and is then locked by the nut.
[0017] In the above solution, the sealing assembly includes a sealing gasket, which is arranged between the ash hopper shell and the dust cover.
[0018] Compared with the existing technology, the utility model enhances the thermal insulation effect of the original inspection door by arranging a sealing gasket and a dust cover assembly, reduces the chance of heat exchange between hot flue gas and cold air outside the door frame, greatly reduces the possibility of condensation and dust accumulation, and does not affect the opening of the original inspection door. The utility model has a simple structure and is convenient and flexible to open, and can be easily opened manually. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings described herein are used to further understand the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0020] Figure 1 This is a structural schematic diagram of an ash hopper inspection door for a dust collector according to an embodiment of the present utility model;
[0021] Figure 2 This is a schematic cross-sectional structural diagram of the inspection door according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0023] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0024] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, article, or device comprising the element.
[0025] like Figure 1 and Figure 2 As shown, embodiment 1 of the present invention provides an ash hopper inspection door for a dust collector, comprising an ash hopper, a dust cover assembly, a rotating assembly, a sealing assembly, a limiting assembly, a door frame assembly, an inspection door assembly, and a locking assembly. The door frame assembly is arranged on the ash hopper, the limiting assembly is arranged on the inner wall of the door frame assembly, the dust cover assembly is arranged at the inner end of the door frame assembly through the rotating assembly, the dust cover assembly and the ash hopper are sealed by a sealing assembly, the inspection door assembly is arranged at the outer end of the door frame assembly, and the locking assembly is arranged on the outer wall of the door frame assembly for locking the inspection door assembly.
[0026] like Figure 1 and Figure 2 As shown, the ash hopper includes an ash hopper shell 1 , an insulation layer 11 , and a flange 12 . The insulation layer 11 is provided on the outer wall of the ash hopper shell 1 , and the flange is provided at the lower part of the ash hopper shell 1 .
[0027] like Figure 1 and Figure 2 As shown, the door frame assembly includes a door frame 3 , and the door frame 3 is arranged on an inspection hole opened in the ash hopper shell 1 .
[0028] like Figure 1 and Figure 2 As shown, the inspection door assembly includes insulating rock wool 41, an outer door cover 42, an inner door cover 43, and a sealing ring 44. The two ends of the inner door cover 43 are connected to the two ends of the outer door cover 42, and the insulating rock wool 41 is arranged between the outer door cover 42 and the inner door cover 43. A groove is provided at the edge of the outer door cover 42, and the sealing ring 44 is arranged in the groove.
[0029] like Figure 1 and Figure 2 As shown, the locking assembly includes a hinge 51 and a ring nut 52 . One end of the hinge 51 is connected to the door frame 3 , and the other end of the hinge 51 is connected to the outer door cover 42 . The inspection door assembly is locked by the ring nut 52 .
[0030] In the above solution, the inspection door assembly is opened by rotating the hinge 51, and is locked by four sets of evenly arranged ring nuts 52 when the inspection door assembly is closed.
[0031] like Figure 1 and Figure 2 As shown, the limiting assembly includes a limiting round steel 6 , and the limiting round steel 6 includes two, which are respectively welded on the inner wall of the door frame 3 and located at two symmetrical positions in the diameter direction of the door frame 3 .
[0032] like Figure 1 and Figure 2 As shown, the dust cover assembly includes a dust cover plate 71, a reinforcement plate 72, and an elastic pressure plate 73, and the dust cover plate 71, the reinforcement plate 72, and the elastic pressure plate 73 are sequentially connected through a rotating assembly.
[0033] like Figure 1 and Figure 2 As shown, the rotating assembly includes a bolt 81 and a nut 82 . The bolt 81 passes through the dust cover 71 , the reinforcing plate 72 and the elastic pressure plate 73 in sequence and is then locked by the nut 82 .
[0034] like Figure 1 and Figure 2 As shown, the sealing assembly includes a sealing gasket 2 , which is arranged between the ash hopper shell 1 and the dust cover plate 71 .
[0035] The working principle of this utility model is as follows:
[0036] like Figure 1 and Figure 2As shown, when using the present invention, first adhere a sealing gasket 2 around the hopper's access hole, weld a retaining round steel bar 6 inside the door frame 3, then spot-weld the dust cover 71 and reinforcement plate 72 together using bolts 81. Finally, install the elastic pressure plate 73. When assembling the nut 82, ensure a certain gap between the nut 82 and the elastic pressure plate 73. The nut 82 only serves as a limiter, allowing the elastic pressure plate 73 to rotate freely. After adjusting the position of the nut 82, weld it to the bolt 81 to prevent loosening. When installing the dust cover 71, first rotate the elastic pressure plate 73 to the left or right to offset the position of the limit round steel 6. Then, the dust cover 71 can be installed at the position of the ash hopper inspection hole. After pressing the sealing gasket 2, rotate the elastic pressure plate 73 to the vicinity of the position of the limit round steel 6. Press down the two ends of the elastic pressure plate 73 with appropriate force to make it lower than the position of the limit round steel 6. Then rotate it a little bit. Using the change of the elastic deformation of the elastic pressure plate 73, the ends of the elastic pressure plate 73 are clamped on the limit round steel 6. The elastic force generated by the deformation of the elastic pressure plate 73 is used to tightly compress and fix the dust cover 71 on the ash hopper inspection hole. The pressing force of the elastic pressure plate 73 can also be adjusted according to its own shape change. When opening, first press down the two ends of the elastic pressure plate 73, then manually rotate the elastic pressure plate 73 to leave the limit position of the limit round steel 6. The dust cover 71 can be opened. The elastic pressure plate 73 also acts as a handle, which is convenient for manual disassembly and assembly of the dust cover 71.
[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.
Claims
1. An ash hopper inspection door for a dust collector, characterized in that: It includes an ash hopper, a dust cover assembly, a rotating assembly, a sealing assembly, a limit assembly, a door frame assembly, an inspection door assembly, and a locking assembly. The door frame assembly is arranged on the ash hopper, the limit assembly is arranged on the inner wall of the door frame assembly, the dust cover assembly is arranged at the inner end of the door frame assembly through the rotating assembly, the dust cover assembly and the ash hopper are sealed by the sealing assembly, the inspection door assembly is arranged at the outer end of the door frame assembly, and the locking assembly is arranged on the outer wall of the door frame assembly for locking the inspection door assembly.
2. The ash hopper access door for a dust collector according to claim 1, characterized in that: The ash hopper comprises an ash hopper shell, an insulation layer, and a flange. The insulation layer is arranged on the outer wall of the ash hopper shell, and the flange is arranged at the lower part of the ash hopper shell.
3. The ash hopper access door for a dust collector according to claim 2, characterized in that: The door frame assembly comprises a door frame, and the door frame is arranged on an inspection hole opened in the ash hopper shell.
4. The ash hopper access door for a dust collector according to claim 3, characterized in that: The inspection door assembly includes thermal insulation rock wool, an outer door cover, an inner door cover, and a sealing ring. The two ends of the inner door cover are connected to the two ends of the outer door cover, and thermal insulation rock wool is arranged between the outer door cover and the inner door cover. A groove is provided at the edge of the outer door cover, and the sealing ring is arranged in the groove.
5. The ash hopper access door for a dust collector according to claim 4, characterized in that: The locking assembly includes a hinge and a ring nut. One end of the hinge is connected to the door frame, and the other end of the hinge is connected to the outer door cover. The inspection door assembly is locked by the ring nut.
6. The ash hopper inspection door for a dust collector according to claim 5, characterized in that: The limiting assembly includes two limiting round steel bars, which are respectively welded on the inner wall of the door frame and located at two symmetrical positions in the diameter direction of the door frame.
7. The ash hopper inspection door for a dust collector according to claim 6, characterized in that: The dust cover assembly includes a dust cover plate, a reinforcement plate, and an elastic pressure plate, and the dust cover plate, the reinforcement plate, and the elastic pressure plate are sequentially connected through a rotating assembly.
8. The ash hopper inspection door for a dust collector according to claim 7, characterized in that: The rotating assembly includes a bolt and a nut, and the bolt passes through the dust cover plate, the reinforcement plate and the elastic pressure plate in sequence and is then locked by the nut.
9. The ash hopper access door for a dust collector according to claim 8, characterized in that: The sealing assembly includes a sealing gasket, which is arranged between the ash hopper shell and the dust cover plate.