Split manhole cover plate structure

Abstract

The utility model provides a kind of split manhole cover structure, it includes: seat ring and spliced manhole cover structure installed on seat ring, manhole cover structure is attached with seat ring edge connection, seat ring side wall and manhole cover structure top are equipped with multiple evenly distributed locking mechanism, sealing mechanism is equipped between manhole cover structure and seat ring.The utility model uses split manhole cover structure, realizes split dismounting function, breaks through limited space limit, improves narrow cabin installation, dismounting and transport convenience;Through split light-weight design, reduce single piece weight, improve handling and installation efficiency, facilitate single-person operation;Adopt double sealing structure, while realizing light weight, ensure manhole cover sealing performance, improve sealing reliability;Adopt quick fastening structure, without special tool can complete dismounting, improve overhaul maintenance efficiency;Split structure is convenient for local replacement, reduce maintenance cost, with good engineering application value.

Description

Technical Field

[0001] This utility model relates to a split-type manhole cover structure, belonging to the field of manhole cover technology. Background Technology

[0002] Manhole covers are important outfitting components for various compartments of ships (fuel tanks, ballast water tanks, fresh water tanks, sewage tanks, cargo oil tanks, etc.) as well as land-based storage tanks and pressure vessels. Their main function is to provide access for inspection, cleaning and maintenance operations while ensuring the compartment is sealed.

[0003] Existing marine manhole covers mostly adopt an integral structure, which has the following shortcomings: 1. The integral manhole cover is large in size and weight. After being disassembled in confined spaces such as the ship's engine room and bottom, it is often impossible to move it out through narrow passages or openings due to its large size, which presents the problem of "large items cannot be transported through small spaces". 2. The integral structure has a large single component weight, making it difficult to transport and install, and is not conducive to single-person operation and maintenance; 3. Existing lightweight solutions often fail to maintain sealing performance, which can reduce the reliability of compartment sealing and pose a risk of media leakage. 4. Traditional multi-bolt fastening methods are cumbersome to install and remove, resulting in low maintenance efficiency. Utility Model Content

[0004] This utility model aims to solve the technical problems of existing marine integral manhole covers, such as large size, heavy weight, difficulty in disassembly and assembly in confined space, and difficulty in ensuring sealing performance after weight reduction, by providing a split manhole cover structure.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions: This utility model provides a split-type manhole cover structure, including a seat ring and a spliced ​​manhole cover structure installed on the seat ring. The manhole cover structure is fitted and connected to the edge of the seat ring. Multiple evenly distributed locking mechanisms are installed on the side wall of the seat ring and the top of the manhole cover structure. A sealing mechanism is provided between the manhole cover structure and the seat ring. The manhole cover structure is composed of four cover plates spliced ​​together. The sealing mechanism includes a sealing ring and a sealing structure. The sealing ring is fixedly connected to the top surface of the manhole flange. The sealing structure is disposed between the cover plates. The manhole cover structure is fitted and connected to the surface of the sealing ring.

[0006] In this technical solution, a manhole flange is provided at the top of the seat ring, and multiple evenly distributed notches are provided on the edge of the manhole flange, and each notch is distributed corresponding to the locking mechanism.

[0007] In this technical solution, each pair of cover plates has a semi-circular structure and a rectangular structure, respectively. Side plates are fixedly connected at the joint of adjacent cover plates, and adjacent side plates are fitted together.

[0008] In this technical solution, the top of the side plate is provided with a plurality of evenly distributed openings, and the other side plate corresponding to the openings is provided with a slot. The openings and slots are distributed in correspondence with the locking mechanism.

[0009] In this technical solution, the locking mechanism includes a connecting seat, a screw, and a wing nut. The connecting seat is fixedly connected to the side wall of the seat ring and the top surface of the cover plate, respectively. One end of the screw is rotatably connected to the connecting seat, and the other end of the screw is threaded with a wing nut.

[0010] In this technical solution, the screws are respectively installed inside the notch, the opening and the slot, the wing nuts are respectively fitted and connected to the top surface of the cover plate and the side wall of the side plate, and the edge of the cover plate has a notch corresponding to the manhole flange.

[0011] In this technical solution, the sealing ring is disposed inside the notch, and the sealing ring is an annular structure disposed on the top of the seat ring.

[0012] In this technical solution, the sealing structure is disposed between two adjacent side plates. The sealing structure includes a sealing strip, a first sealing gasket, and a second sealing gasket. The sealing strip is fixedly connected to one of the side plates and is fitted to the other side plate.

[0013] In this technical solution, both ends of one side of the sealing strip are fixedly connected to the first sealing gasket, and the second sealing gasket is disposed on the other side of the sealing strip. The first sealing gasket and the second sealing gasket are distributed correspondingly. The second sealing gasket has an L-shaped structure and is attached to the sealing strip. The first sealing gasket and the second sealing gasket are disposed on both sides of the sealing strip.

[0014] In this technical solution, both the first sealing gasket and the second sealing gasket are embedded inside the bottom end of the side plate, and both the first sealing gasket and the second sealing gasket are in close contact with the top surface of the sealing ring.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0016] The positive and progressive effects of this utility model are as follows: The aforementioned split-type manhole cover structure utilizes a split-type manhole cover design, enabling separate assembly and disassembly. This overcomes the limitations of confined spaces and improves the convenience of installation, disassembly, and transportation in narrow compartments. The split-type lightweight design reduces the weight of individual components, improving handling and installation efficiency and facilitating single-person operation. A double-sealing structure ensures the manhole cover's sealing performance while achieving lightweight design, enhancing sealing reliability. A quick-fastening structure allows for assembly and disassembly without special tools, improving maintenance efficiency. The split structure facilitates partial replacement, reducing maintenance costs and demonstrating significant engineering application value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal front view of the present invention.

[0019] Figure 3 This is a schematic diagram of the half-section structure of this utility model.

[0020] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 5 This is a partial three-dimensional structural diagram of the cover plate of this utility model.

[0022] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0023] Figure 7 This is a three-dimensional structural diagram of the sealing strip of this utility model.

[0024] Explanation of reference numerals in the attached figures: 11. Seat ring; 111. Manhole flange; 112. Notch; 113. Sealing ring; 21. Cover plate; 211. Side plate; 212. Opening; 213. Slot; 22. Connecting seat; 221. Threaded rod; 222. Wing nut; 23. Sealing strip; 231. First sealing gasket; 232. Second sealing gasket. Detailed Implementation

[0025] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments described herein.

[0026] like Figure 1-7As shown, the split-type manhole cover structure includes a seat ring 11 and a spliced ​​manhole cover structure installed on the seat ring 11. The manhole cover structure is fitted and connected to the edge of the seat ring 11. Multiple evenly distributed locking mechanisms are installed on the side wall of the seat ring 11 and the top of the manhole cover structure. A sealing mechanism is provided between the manhole cover structure and the seat ring 11. In this way, the manhole cover structure can be installed on the top of the seat ring 11 through the locking mechanism. At the same time, the locking mechanism can seal the splicing position of the spliced ​​manhole cover structure. The locking mechanism can maximize the protective effect of the sealing mechanism and ensure the sealing performance of the manhole position.

[0027] The top of the seat ring 11 is provided with a manhole flange 111, and the edge of the manhole flange 111 is provided with a plurality of evenly distributed notches 112, and each notch 112 is distributed corresponding to the locking mechanism. Thus, the notches 112 can be used for the installation of the locking mechanism.

[0028] The manhole cover structure consists of four cover plates 21 spliced ​​together. Each pair of cover plates 21 has a semi-circular structure and a rectangular structure, respectively. Side plates 211 are fixedly connected at the splicing points of adjacent cover plates 21. Adjacent side plates 211 are fitted together. In this way, the four cover plates 21 can be spliced ​​together to form the same structure as the seat ring 11. The side plates 211 ensure accurate correspondence of the splicing positions and facilitate assembly.

[0029] The sealing mechanism includes a sealing ring 113 and a sealing structure. The sealing ring 113 is fixedly connected to the top surface of the manhole flange 111, and the sealing structure is disposed between the cover plates 21. The manhole cover structure is in close contact with the surface of the sealing ring 113. Thus, the sealing ring 113 achieves a seal between the seat ring 11 and the manhole cover, and the sealing structure ensures the sealing performance at the joint of the cover plates 21.

[0030] The sealing ring 113 is located inside the notch 112. The sealing ring 113 is an annular structure and is located on the top of the seat ring 11. Thus, when the locking mechanism fixes the cover plate 21 onto the manhole flange 111, the sealing ring 113 achieves a seal between the seat ring 11 and the manhole cover structure. The notch 112 and the locking mechanism do not affect the seal at the sealing ring 113.

[0031] The top of the side plate 211 has a plurality of evenly distributed openings 212, and the other side plate 211 corresponding to the openings 212 has a slot 213. The openings 212 and the slots 213 are distributed in correspondence with the locking mechanism.

[0032] The locking mechanism includes a connecting seat 22, a screw 221, and a wing nut 222. The connecting seat 22 is fixedly connected to the side wall of the seat ring 11 and the top surface of the cover plate 21. One end of the screw 221 is rotatably connected to the connecting seat 22, and the other end of the screw 221 is threadedly connected to the wing nut 222. The screw 221 is respectively disposed inside the notch 112, the opening 212, and the slot 213. The wing nut 222 is respectively fitted and connected to the top surface of the cover plate 21 and the side wall of the side plate 211. The edge of the cover plate 21 has a notch 112 corresponding to the manhole flange 111.

[0033] Thus, the locking mechanism located on the side plate 211 of the seat ring 11 can press the cover plate 21 onto the top surface of the manhole flange 111. The pressure applied by the wing nut 222 to the edge of the cover plate 21 causes the cover plate 21 to press onto the manhole flange 111 and press the sealing ring 113, thereby achieving stable installation. The locking mechanism located on the top of the cover plate 21 can form a pull between adjacent side plates 211, so that the side plates 211 fit together and are pressed and fixed.

[0034] The sealing structure is disposed between two adjacent side plates 211. The sealing structure includes a sealing strip 23, a first sealing gasket 231, and a second sealing gasket 232. The sealing strip 23 is fixedly connected to one side plate 211 and also fits against the other side plate 211. Both ends of one side of the sealing strip 23 are fixedly connected to the first sealing gasket 231. The second sealing gasket 232 is disposed on the other side of the sealing strip 23. The first sealing gasket 231 and the second sealing gasket 232 are correspondingly distributed. The second sealing gasket 232 has an L-shaped structure and fits against the sealing strip 23. The first sealing gasket 231 and the second sealing gasket 232 are respectively disposed on both sides of the sealing strip 23. Both gaskets 231 and 232 are embedded inside the bottom of the side plate 211. The first sealing gasket 231 and the second sealing gasket 232 are both attached to the top surface of the sealing ring 113. Thus, when adjacent cover plates 21 are spliced ​​together, the side plates 211 are attached to each other, and the two side plates 211 press the sealing strip 23 to achieve a seal between the adjacent side plates 211. At the same time, the side plates 211 drive the second sealing gasket 232 to adhere to the sealing strip 23. When the cover plate 21 is placed on the seat ring 11, the bottom of the first sealing gasket 231, the second sealing gasket 232 and the sealing strip 23 are pressed against the top of the sealing ring 113. The elastic deformation of the sealing strip 23 and the sealing gasket and the tight fit with the sealing ring 113 ensure that there will be no leakage at the splicing position, effectively improving the sealing effect.

[0035] Furthermore, the first sealing gasket 231 and the second sealing gasket 232 have the same structure as the sealing ring 113, so that when the sealing ring 113 contacts the first sealing gasket 231 and the second sealing gasket 232 respectively, the sealing at the contact position is achieved.

[0036] Specifically, in use, the cover plate 21 is first placed on top of the seat ring 11 and supported by the manhole flange 111. Then, the screw 221 is rotated to overlap the opening 212, so that the screw 221 is arranged horizontally. Another cover plate 21 is placed on the seat ring 11 and moved horizontally so that the side plates 211 fit together. At the same time, after the screw 221 passes through the slot 213, the wing nut 222 is tightened to achieve the splicing between adjacent cover plates 21. The subsequent cover plates 21 are installed in this way so that the manhole cover structure is formed after all the cover plates 21 are spliced. Finally, the screw 221 on the side wall of the seat ring 11 is rotated to the vertical position. At this time, the screw 221 is located inside the notch 112. Finally, the wing nut 222 is tightened to press the manhole cover structure onto the manhole flange 111, thereby realizing the installation of the manhole cover structure.

[0037] During disassembly, simply unscrew the wing nuts 222 on the side wall of the seat ring 11 and the cover plate 21, and then move the cover plate 21 in sequence to remove it in batches, thereby achieving convenient and quick disassembly of the manhole cover structure.

[0038] The seat ring 11 has a height of 150 mm, and the cover plate 21 has a thickness of 15 mm. In one embodiment, this application is applied to the manhole location for maintenance in a ship's ballast tank; it allows for separate assembly and disassembly, improving the convenience of manhole maintenance while meeting structural strength and sealing requirements.

[0039] In another embodiment, this application is applied to the maintenance manhole location of the double-bottom oil tank in the engine room of a ship. The traditional integral manhole cover structure is relatively heavy, and usually requires multiple people to complete the disassembly and assembly process. It is inconvenient to operate in narrow spaces. The manhole cover structure of this application adopts a 4-piece split structure, and each cover plate 21 can be disassembled and assembled independently. During operation, the personnel can loosen the wing nuts 222 in sequence and release the pre-tightening of the cover plate 21 pieces, and then disassemble the cover plates one by one without the need for overall hoisting.

[0040] Field application results show that the present invention can effectively reduce the weight of a single disassembly and assembly, improve the convenience of maintenance, shorten the opening time, and at the same time meet the requirements of manhole sealing and structural strength.

[0041] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A split-type manhole cover structure, comprising a seat ring (11) and a spliced ​​manhole cover structure mounted on the seat ring (11), characterized in that, The manhole cover structure is fitted and connected to the edge of the seat ring (11). Multiple evenly distributed locking mechanisms are installed on the side wall of the seat ring (11) and the top of the manhole cover structure. A sealing mechanism is provided between the manhole cover structure and the seat ring (11). The manhole cover structure is composed of four cover plates (21) spliced ​​together. The sealing mechanism includes a sealing ring (113) and a sealing structure. The sealing ring (113) is fixedly connected to the top surface of the manhole flange (111). The sealing structure is set between the cover plates (21). The manhole cover structure is fitted and connected to the surface of the sealing ring (113). The sealing structure is disposed between two adjacent side plates (211). The sealing structure includes a sealing strip (23), a first sealing gasket (231), and a second sealing gasket (232). The sealing strip (23) is fixedly connected to one of the side plates (211), and the sealing strip (23) is fitted and connected to the other side plate (211).

2. The split-type manhole cover structure as described in claim 1, characterized in that: The seat ring (11) is provided with a manhole flange (111) at the top. The manhole flange (111) has multiple evenly distributed notches (112) on its edge, and each notch (112) is distributed corresponding to the locking mechanism.

3. The split-type manhole cover structure as described in claim 1, characterized in that: Each pair of cover plates (21) has a semi-circular structure and a rectangular structure, respectively. Side plates (211) are fixedly connected at the joint of adjacent cover plates (21), and adjacent side plates (211) are fitted together.

4. The split-type manhole cover structure as described in claim 3, characterized in that: The top of the side plate (211) has a plurality of evenly distributed openings (212), and the other side plate (211) corresponding to the openings (212) has a slot (213). The openings (212) and the slots (213) are distributed in correspondence with the locking mechanism.

5. The split-type manhole cover structure as described in claim 4, characterized in that: The locking mechanism includes a connecting seat (22), a screw (221) and a wing nut (222). The connecting seat (22) is fixedly connected to the side wall of the seat ring (11) and the top surface of the cover plate (21) respectively. One end of the screw (221) is rotatably connected to the connecting seat (22), and the other end of the screw (221) is threaded with a wing nut (222).

6. The split-type manhole cover structure as described in claim 5, characterized in that: The screw (221) is respectively installed inside the notch (112), the opening (212) and the slot (213), and the wing nut (222) is respectively attached to the top surface of the cover plate (21) and the side wall of the side plate (211). The edge of the cover plate (21) is provided with a notch (112) corresponding to the manhole flange (111).

7. The split-type manhole cover structure as described in claim 1, characterized in that: The sealing ring (113) is located inside the notch (112), and the sealing ring (113) is an annular structure and is located on the top of the seat ring (11).

8. The split-type manhole cover structure as described in claim 1, characterized in that: The sealing strip (23) is fixedly connected to the first sealing gasket (231) at both ends on one side, and the second sealing gasket (232) is disposed on the other side of the sealing strip (23). The first sealing gasket (231) and the second sealing gasket (232) are distributed correspondingly. The second sealing gasket (232) has an L-shaped structure and is attached to the sealing strip (23). The first sealing gasket (231) and the second sealing gasket (232) are disposed on both sides of the sealing strip (23).

9. The split-type manhole cover structure as described in claim 1, characterized in that: The first sealing gasket (231) and the second sealing gasket (232) are both embedded inside the bottom end of the side plate (211), and the first sealing gasket (231) and the second sealing gasket (232) are both attached to the top surface of the sealing ring (113).

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