Safety platform suitable for being installed in air duct

Abstract

A safety platform suitable for being installed in an air duct is characterized in that a manhole is formed in the bulkhead of the air duct, the air duct is arranged on one side of the manhole, an external deck is arranged on the other side of the manhole, a square grating plate is arranged on the side, located in the air duct, of the manhole, a manhole cover is fixed to the grating plate, and the manhole cover corresponds to the manhole in position and is matched with the manhole; the bottom of the grating plate is movably connected with the bulkhead through a shaft, shaft sleeves are fixed to the two ends of the shaft and fixed to the bulkhead, the grating plate is wider than the manhole, a seat ring is fixed to the side, located on the air duct, of the manhole and along the circumferential edge of the manhole, a circle of bolt holes are formed in the circumferential direction of the seat ring, and the bolt holes formed in the seat ring correspond to the bolt holes formed in the circumferential direction of the manhole. And bolts penetrate through the bolt holes from one side of the deck outside the manhole to fix the manhole cover on the manhole. The ventilation capacity is not interfered by the platform, the technology is advanced, the conception is ingenious, the manufacturing difficulty is low, the installation is simple, and the technical advantages are particularly obvious.

Description

Technical Field

[0001] The invention belongs to the field of design and construction of marine ship ventilation systems, and in particular relates to a safety platform suitable for installation in an air duct. Background Art

[0002] The ventilation system on the ship will use a lot of structural air ducts. These air ducts are very large, generally square in structure, with a length and width of 1 to 3 meters, and a height of more than 10 meters. The function of the air duct is to exhaust the dirty air in the cabin to the outside, and to blow clean air from the outside into the cabin. On the one hand, it provides fresh air for personnel, and on the other hand, it also cools the equipment in the cabin. In order to maintain the air duct and facilitate construction, straight ladders and manholes need to be set up in the air duct, which can be entered and exited from the platforms on each floor. However, too many outfitting parts cannot be installed in the air duct, otherwise it will affect the wind speed and air volume. Therefore, how to set up these maintenance channels is a matter that needs careful consideration.

[0003] In the past, most ships only had vertical ladders in their structural air ducts to minimize the impact on wind speed and air volume. However, the practice of only providing vertical ladders is not enough for personnel safety protection. It is recommended to add a buffer platform for super-high vertical ladders, especially for manhole entrances and exits. Otherwise, it is very dangerous to enter the air duct directly by climbing the vertical ladder. However, how to increase the safety platform without affecting ventilation is a difficult problem. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a safety platform suitable for installation in the air duct, and the technical solution adopted is: A safety platform suitable for installation in an air duct, wherein a manhole is opened on the air duct bulkhead, one side of the manhole is the air duct, and the other side is the external deck, a square grille plate is arranged on the side of the manhole located in the air duct, a manhole cover is fixed on the grille plate, the thickness of the grille plate at the manhole cover is less than the thickness of the grille plates at other places, the position of the manhole cover corresponds to the manhole, and is adapted to the manhole.

[0005] The bottom of the grille plate is movably connected to the bulkhead through a shaft, and shaft sleeves are fixed at both ends of the shaft, and the shaft sleeves are fixed on the bulkhead. The width of the grille plate is greater than the width of the manhole. The manhole is located on one side of the air duct, and a seat ring is fixed along the circumferential edge of the manhole. A circle of bolt holes is arranged along the circumference of the seat ring. The bolt holes on the seat ring correspond to the bolt holes arranged around the manhole. The bolts pass through the bolt holes from the outer deck side of the manhole to fix the manhole cover on the manhole.

[0006] The above-mentioned safety platform is suitable for installation in the air duct. Furthermore, the manhole has a size of 400mm×600mm and a height of 600mm from the ground.

[0007] The above-mentioned safety platform suitable for installation in the air duct is further provided with a support rod fixed below the shaft sleeve, the end of the support rod is fixed on the bulkhead, and when the grille plate is laid flat, the other end of the support rod contacts the grille plate.

[0008] The above-mentioned safety platform suitable for installation in the air duct is further provided with a handle on the upper part of the manhole cover, and the handle cooperates with the hook rod, and the manhole cover is opened and closed by using the hook rod.

[0009] The above-mentioned safety platform suitable for installation in an air duct further has a sealing gasket bonded to the outer surface of the seat ring.

[0010] The above-mentioned safety platform is suitable for installation in an air duct. Furthermore, the support rod is located below the shaft sleeve, and the shaft sleeve and the support rod are connected to the bulkhead through a pad.

[0011] The present invention changes the manhole cover from an outward-opening design to an inward-opening design, and embeds it in the grille platform. When a person enters the air duct, the foldable safety platform is guaranteed to be in an unfolded state, and when the person leaves the air duct and wants to close the manhole cover, the platform can be strictly folded, ensuring that the ventilation capacity will not be disturbed by the platform. The present invention has advanced technology, clever design, low manufacturing difficulty, simple installation, and particularly obvious technical advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure when the manhole cover is closed; Figure 2 A schematic diagram of the structure when the manhole cover is opened from the side; Figure 3 It is a schematic diagram of the structure when the manhole cover is closed from the side; Figure 4 It is a schematic diagram of the position of the present invention when it is actually installed in the structural air duct; Figure 5 This is a schematic diagram of using an iron chain to open and close a manhole cover; Among them, 1-deck, 2-bulkhead, 4-bolt, 5-seat ring, 6-manhole, 8-manhole cover, 10-handle, 11-grating plate, 12-shaft, 13-shaft sleeve, 14-support rod, 15-pad, 19-hook rod. DETAILED DESCRIPTION

[0013] The present invention will be further described in conjunction with the accompanying drawings. Example

[0014] like Figure 1 , 2 As shown in FIG. 3, the left side of the bulkhead 2 is the interior of the air duct, and the right side is the deck 1. The conventional manhole cover is placed on the right side of the bulkhead 2, but as shown in FIG. AA, the present invention places the manhole cover 8 on the left side of the bulkhead 2, that is, inside the structural air duct, and can also be viewed from the inside. Figure 4The installation position of the present invention can be seen more intuitively.

[0015] The present invention requires a manhole 6 to be opened on the bulkhead 2. The manhole 6 has an elliptical structure, and the opening size is generally 400mmX600mm, with the long side in the vertical direction. The height from the bottom of the opening to the deck 1 is about 600mm, which is just suitable for people to enter and exit.

[0016] A circle of bulkhead bolt holes should be evenly opened around the manhole 6, and the hole diameter is about 2mm~4mm larger than the diameter of the bolt 4. The seat ring 5 is on the left side of the bulkhead 2, that is, inside the structural air duct, and is welded to the left side of the bulkhead 2. A circle of seat ring bolt holes 1 are also evenly opened on the seat ring 5. The number and diameter are exactly the same as the bulkhead bolt holes, and they are just aligned. Figure 1 AA view and Figure 2 It can be seen from the DD view that the bolt 4 needs to pass through the bulkhead bolt hole and the seat ring bolt hole 1, and be tightened on the manhole cover bolt hole to fix the manhole cover 8 on the seat ring 5.

[0017] In order to ensure the sealing performance, a sealing gasket needs to be arranged between the manhole cover 8 and the seat ring 5. The outer dimensions of the sealing gasket are exactly the same as those of the seat ring 5, which plays a sealing role. In order to ensure the convenience of installation, the sealing gasket needs to be glued to the seat ring 5, so that the sealing gasket can be ensured not to fall off after the manhole cover 8 is opened.

[0018] The manhole cover 8 is oval in shape, and the outer ring size is the same as the seat ring 5. In order to reduce the weight, the middle area of ​​the manhole cover is made of thin plates, about 6~8mm. A handle 10 is installed in the upper middle part for opening and closing operations. The handle 10 is installed in a recessed manner. The right side of the manhole cover 8 is flush with the front, and the handle guard is recessed to the left into the left side of the manhole cover 8. This method is to ensure that the front of the manhole cover is flat after it is opened to prevent people from tripping over the handle. Figure 2 DD view shown.

[0019] like Figure 1 As shown in the B-direction view, the manhole cover 8 is integrated with the grille plate 11 as a whole, and after opening, the front of the manhole cover 8 and the grille plate 11 together become a safety platform. Figure 2 DD view shown.

[0020] The grille plate 11 adopts a rotating shaft opening method, and the figure is a schematic diagram of its opening method. Figure 1 and Figure 2 Its detailed structure can be seen. The grid plate 11 is welded on the shaft 12, and the two sides of the shaft 11 are respectively inserted into the shaft sleeve 1 and can rotate around the shaft sleeve 1, and ensure that when closed, the manhole cover 8 can be sealed with the seat ring 5. After opening, it can be turned to a horizontal state, presenting a state of a safe platform.

[0021] In order to ensure that the grille plate 11 can be stabilized in a horizontal state after opening, a support rod 14 needs to be installed under the grille plate 11. Figure 2 The support rods 14 need to be installed in pairs, one on each side of the grille plate 11, and it is necessary to ensure that the support rods can be on the grille plate 11.

[0022] The support rods 14 and the shaft sleeves 1 share the backing plates 15, and there are two sets of them, one on each side of the grid plate 11. This has the advantage of ensuring the accuracy during installation and avoiding errors.

[0023] like Figure 4 As shown, when closing the manhole cover, the personnel can stand outside the manhole 6, that is, stand on the deck 1, use the hook rod 1 to pass through the manhole 6, hook on the manhole cover handle 10, and then pull up the grille plate 11, and close the manhole cover 8, and then use the bolt 4 to pass through the manhole cover bolt hole and the seat ring bolt hole 1, screw it on the manhole cover bolt hole, tighten it, and complete the operation.

[0024] When opening, loosen the bolt 4, the grille plate 11 opens to the left with the manhole cover 8 by gravity, and the hook rod 1 can also be used to slowly release it to avoid impact.

[0025] After entering the structural air duct, personnel can step on the safety platform of the present invention and then climb the vertical ladder, which greatly increases the safety level of personnel.

[0026] like Figure 5 As shown, the manhole cover seat ring 5 and the manhole cover 8 are both installed on the right side of the bulkhead 2, that is, the outside of the structural air duct, which belongs to the conventional manhole cover installation method. However, in order to ensure the retraction and deployment of the safety platform, an iron chain is welded on the top of the grid plate 11, and a hook is welded on the left side of the bulkhead 2, that is, inside the structural air duct, near the upper part of the manhole cover.

[0027] When entering the structural air duct, the iron chain is loosened, the grille plate 11 is lowered and placed on the support 14 in a horizontal state, and then the structural air duct can be entered through the manhole 6.

[0028] After leaving the structural air duct, the iron chain can be pulled to pull up the grille plate 11. After being pulled up to a vertical state, the iron chain is hung on the hook, and a suitable iron chain ring can be selected according to the actual situation. The grille plate 11 is fixed to avoid affecting the ventilation effect as much as possible.

[0029] This design can also ensure that the safety platform is in an open state before personnel enter the structural air duct, thereby ensuring personnel safety. When personnel leave, even if they forget to put away the grille plate 11, the design of the grille plate has little effect on ventilation, and generally speaking, it will not cause a big impact.

Claims

1. A safety platform suitable for installation in an air duct, characterized in that: A manhole is opened on the air duct bulkhead, with the air duct on one side of the manhole and the external deck on the other side. A square grille plate is provided on the side of the manhole located in the air duct, and a manhole cover is fixed on the grille plate. The thickness of the grille plate at the manhole cover is less than that of the grille plates at other places. The position of the manhole cover corresponds to the manhole and is adapted to the manhole; The bottom of the grille plate is movably connected to the bulkhead through a shaft, and shaft sleeves are fixed at both ends of the shaft, and the shaft sleeves are fixed on the bulkhead. The width of the grille plate is greater than the width of the manhole. The manhole is located on one side of the air duct, and a seat ring is fixed along the circumferential edge of the manhole. A circle of bolt holes is arranged along the circumference of the seat ring. The bolt holes on the seat ring correspond to the bolt holes arranged around the manhole. The bolts pass through the bolt holes from the outer deck side of the manhole to fix the manhole cover on the manhole.

2. A safety platform suitable for installation in an air duct according to claim 1, characterized in that: The manhole size is 400mm×600mm, and the manhole height from the ground is 600mm.

3. A safety platform suitable for installation in an air duct according to claim 1, characterized in that: A support rod is fixed below the shaft sleeve, and the end of the support rod is fixed on the bulkhead. When the grid plate is laid flat, the other end of the support rod contacts the grid plate.

4. A safety platform suitable for installation in an air duct according to claim 1, characterized in that: A handle is provided on the upper part of the manhole cover, and the handle cooperates with a hook rod, and the manhole cover is opened and closed by utilizing the hook rod.

5. A safety platform suitable for installation in an air duct according to claim 1, characterized in that: A sealing gasket is bonded to the outer surface of the seat ring.

6. A safety platform suitable for installation in an air duct according to claim 3, characterized in that: The support rod is located below the shaft sleeve, and the shaft sleeve and the support rod are connected to the bulkhead through a pad.

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