Fastening device for steam pocket manhole door

Abstract

The utility model discloses a fastening device for a steam pocket manhole door, the fastening device is used for fixedly welding a manhole cover, the fastening device comprises a panel, connecting plates and end reinforcing plates, the two ends of the panel are fixedly connected with the end reinforcing plates respectively, the connecting plates are fixedly installed on the two sides of the panel and the two sides of the end reinforcing plates respectively, and the connecting plates are fixedly connected with the panel. The two ends of the panel are each provided with a half-kidney-shaped hole used for being matched with installation of a fastening bolt of the manhole door. The utility model has simple and reasonable structure, can be matched with various steam pocket manhole doors to be installed and used, improves the stability of the whole structure through the combination of the panel, the end reinforcing plate and the internal reinforcing plate, has higher bearing capacity, and improves the service life of the steam pocket in the installation and operation process of the steam pocket. And a higher fastening load of a fastening bolt and an impact load generated in the operation process of equipment can be borne without falling off and deforming.

Description

Technical Field

[0001] This utility model relates to the field of industrial boiler technology, and in particular to a fastening device for a manhole door of a steam drum. Background Technology

[0002] A steam drum manhole is a perforated structure designed on the steam drum to allow maintenance personnel to enter the interior of the steam drum during boiler maintenance or inspection. Its function is to facilitate the installation, disassembly, cleaning, and maintenance of internal steam drum components. Manhole door fastening devices are matching fastening connection components between the steam drum and the manhole door, widely used in the manufacturing of steam drums, heat exchangers, reactors, and other boiler components.

[0003] Existing steam drum manhole fastening devices, such as Figure 1 As shown, it includes a folding plate 1, a support rod 2, a fastening bolt 3, a nut and washer 4, a manhole neck ring 5, a bolt washer 6, and a manhole cover 7. The folding plate is welded to the inner end face of the manhole cover and connected to the support rod through fastening bolts, nuts, washers, and bolt washer plates. The axial tensile force generated after the fastening bolts are tightened secures the manhole cover to the manhole neck ring, thereby securing the manhole to the steam drum.

[0004] The folding plate of this fastening device is made of stamped steel plate. Although this fastening device has a simple structure and is easy to implement, the bending point of the folding plate 1 has reduced material rigidity and high residual stress due to plastic processing. During boiler operation, it is susceptible to deformation and even cracking due to high temperature, vibration, and impact loads, which in turn affects the sealing performance of the manhole device. Therefore, it is essential to provide a more reliable manhole door fastening device. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model designs a fastening device for the manhole door of a steam drum.

[0006] The present invention adopts the following technical solution:

[0007] A fastening device for a steam drum manhole door is disclosed. The device is used to securely weld the manhole cover. The fastening device includes a panel, connecting plates, and end reinforcing plates. The end reinforcing plates are fixedly connected to both ends of the panel. Connecting plates are fixedly installed on both sides of the panel and the end reinforcing plates. Semi-circular holes are provided at both ends of the panel for mounting the manhole door's fastening bolts. This invention utilizes end reinforcing plates to strengthen the ends of the panel, improving the panel's ability to withstand shear stress.

[0008] Preferably, an internal reinforcing plate is fixedly installed between the panel and the connecting plate. The internal reinforcing plate works in conjunction with the panel and the connecting plate to reinforce and improve the overall rigidity and strength of the fastening device.

[0009] Preferably, the connection points of the panel, connecting plate, end reinforcing plate and internal reinforcing plate are fixed by welding.

[0010] Preferably, the connecting plate has an oblong hole in the middle. The oblong hole can be used as a manhole cover handle and improves the heat dissipation efficiency of the manhole cover.

[0011] Preferably, the end reinforcing plates are provided with T-shaped hand holes. The T-shaped hand holes are used to facilitate the installation of manhole fastening bolts.

[0012] The beneficial effects of this utility model are: the structure of this utility model is simple and reasonable, and it can be used with various steam drum manhole doors. The stability of the overall structure is increased by combining the panel, end reinforcing plate and internal reinforcing plate, and it has a higher load-bearing capacity. During the installation and operation of the steam drum, it can withstand higher fastening loads of fastening bolts and impact loads generated during equipment operation without falling off or deforming. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an existing manhole fastening device applied to a steam drum manhole.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model applied to the manhole door of a steam drum;

[0015] Figure 3 This is a schematic diagram of the structure of this utility model;

[0016] Figure 4 This is a structural schematic diagram from another perspective of this utility model;

[0017] In the diagram: 1. Folding plate, 2. Support rod, 3. Fastening bolt, 4. Nut and washer, 5. Manhole collar, 6. Bolt washer, 7. Manhole cover, 8. Fastening device, 9. Panel, 10. Connecting plate, 11. End reinforcement plate, 12. Internal reinforcement plate, 13. Oval hole, 14. T-shaped handhole. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0019] Example: Figures 3-4 As shown, a fastening device for a steam drum manhole door is disclosed. The fastening device 8 is used to fix the welded manhole cover. The fastening device includes a panel 9, a connecting plate 10, and an end reinforcing plate 11. The end reinforcing plate is fixedly connected to both ends of the panel. Connecting plates are fixedly installed on both sides of the panel and the end reinforcing plate. Semi-circular holes are provided at both ends of the panel for installing the fastening bolts of the manhole door. This utility model utilizes the end reinforcing plate to reinforce the ends of the panel, improving the panel's ability to withstand shear stress at both ends.

[0020] An internal reinforcing plate 12 is fixedly installed between the panel and the connecting plate. The internal reinforcing plate works in conjunction with the panel and the connecting plate to reinforce each other, improving the overall rigidity and strength of the fastening device. The connection between the panel, the connecting plate, the end reinforcing plate, and the internal reinforcing plate is fixed by welding.

[0021] The connecting plate has an oblong hole 13 in the middle. The oblong hole can be used as a manhole cover handle and improves the heat dissipation efficiency of the manhole cover. The end reinforcing plate has a T-shaped hand hole 14. The T-shaped hand hole is used to facilitate the installation of the manhole fastening bolts.

[0022] like Figure 2 As shown, the fastening device of this utility model is welded to the inner end face of the manhole cover and connected to the support rod 2 through fastening bolts 3, nuts, washers 4, and bolt washers 6. The axial tensile force generated after the fastening bolts are tightened is used to fasten the manhole cover 7 to the manhole neck ring 5, thereby fastening the manhole and the steam drum.

[0023] This utility model is a fastening device that can be adapted to various specifications of steam drum manhole doors for installation and use according to size variations. The stability of the overall structure is increased by end reinforcement plates and internal reinforcement plates, resulting in higher load-bearing capacity. During steam drum installation and operation, it can withstand higher bolt fastening loads.

[0024] This utility model has a simple and reasonable structure and can be used with various steam drum manhole doors. The overall structure is stabilized by combining the panel, end reinforcement plates and internal reinforcement plates, and has a higher load-bearing capacity. During the installation and operation of the steam drum, it can withstand higher fastening loads of fastening bolts and impact loads generated during equipment operation without falling off or deforming.

[0025] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A fastening device for a steam drum manhole door, the fastening device being used to fix a welded manhole cover, characterized in that, The fastening device includes a panel, a connecting plate, and an end reinforcing plate. The end reinforcing plates are fixedly connected to both ends of the panel, and the connecting plates are fixedly installed on both sides of the panel and the end reinforcing plates. Semi-circular holes are opened at both ends of the panel for installing the fastening bolts of the manhole door.

2. A fastening device for a steam drum manhole door according to claim 1, characterized in that, An internal reinforcing plate is fixedly installed between the panel and the connecting plate.

3. A fastening device for a steam drum manhole door according to claim 2, characterized in that, The connection points of the panel, connecting plate, end reinforcing plate and internal reinforcing plate are fixed by welding.

4. A fastening device for a steam drum manhole door according to claim 1, characterized in that, The connecting plate has oval holes in the middle.

5. A fastening device for a steam drum manhole door according to claim 1, characterized in that, T-shaped hand holes are provided on the end reinforcement plates.

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