Manhole structure

Abstract

The utility model relates to a manhole structure which comprises a flange cover, a connecting pipe welded with a reaction container barrel and a flange welded with the connecting pipe, the flange cover comprises a flange cover main body part, a conical plug core welded on one side of the flange cover main body part and a balancing weight welded on the other side of the flange cover main body part, a lifting lug is arranged above the flange cover main body part, the conical plug core comprises a cone part and a baffle welded with the cone part, the flange cover main body part, the cone part and the baffle jointly form a cavity, and a cross rib plate welded with the baffle and the flange cover main body part is arranged in the cavity. The flange cover comprises a flange cover main body part, a cross rib plate is arranged in the flange cover main body part, a notch is formed between the staggered position of the cross rib plate and the flange cover main body part so that four cavities separated by the cross rib plate can be communicated with one another, a leak detection hole communicated with a cavity is formed in the center of the flange cover main body part, a plug is arranged on the leak detection hole, and the cavity is filled with a heat insulation piece, so that the structural strength is greatly improved, and the service life of the flange cover is prolonged. And leakage detection is realized.

Description

[Technical field]

[0001] The utility model relates to the field of reaction containers, in particular to a manhole structure. [Background technology]

[0002] Reaction vessels are containers used to complete physical and chemical reactions of media. In industrial production, especially in the chemical, pharmaceutical, fertilizer, and refining industries, reaction vessels are used extensively as a pressure-bearing equipment due to process needs. The manhole on the reaction vessel is used for regular maintenance. The manhole is opened during maintenance and closed when not under maintenance.

[0003] Please refer to the existing document (patent application number: 202123413404.8), which discloses a manhole structure in the prior art, including: a flange welded on a manhole cone, a manhole cover is sealed and fixedly connected to the flange, the manhole cover and the flange are fixedly connected by fasteners, a ring plate is fixedly connected to the inner side of the flange and is spaced apart from the manhole cover, an annular first thermal insulation layer is fixedly connected to the inner wall of the manhole cone and the cold wall tube connected to the manhole cone, the inner diameter of the first thermal insulation layer is equal to the inner diameter of the flange, and an annular second thermal insulation layer is fixedly connected to the first thermal insulation layer. The heat insulation layer, the front end of the second heat insulation layer is in contact with the ring plate, the inner diameter of the second heat insulation layer is equal to the inner diameter of the ring plate, the space between the manhole cover and the ring plate is filled with heat insulation materials, the second heat insulation layer is inserted with a plug assembly, the plug assembly includes a cylindrical plug short section, the plug short section is filled with heat insulation materials, the rear end of the plug short section is sealed and fixed with a rear end baffle, the front end of the plug short section is fixed with a front end baffle with an inner hole, the front end baffle is located between the manhole cover and the ring plate, and a pressure plate in contact with the manhole cover is fixed on the front end baffle, and the pressure plate is used to compress the heat insulation materials in the plug short section. The defects of this manhole structure are: 1. Since the plug and the manhole cover are two separate parts, both need to be assembled and disassembled separately during assembly and disassembly, which is time-consuming and labor-intensive; 2. The structural strength of this manhole structure is low and cannot be applied to high-pressure reaction vessels; 3. Once a leak occurs at the plug, this manhole structure cannot be leak-detected.

[0004] Therefore, it is necessary to provide a manhole structure that solves the above-mentioned technical problems. [Contents of the utility model]

[0005] In order to solve the above problems, the purpose of the utility model is to provide a manhole structure with high structural strength.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a manhole structure, comprising: a flange cover, a pipe welded to the reaction vessel cylinder and a flange welded to the pipe, the flange and the flange cover are connected by a plurality of fixings, the flange cover comprises: a flange cover body, a conical plugging core welded to one side of the flange cover body and a counterweight block welded to the other side of the flange cover body, a lifting lug is arranged above the flange cover body, the conical plugging core comprises a cone body and a baffle welded to the cone body, the flange cover body, the cone body and the baffle together form a cavity, a cross rib plate respectively welded to the baffle and the flange cover body is arranged in the cavity, a notch is arranged between the intersection of the cross rib plate and the flange cover body so that the four chambers separated by the cross rib plate are mutually connected, a leak detection hole connected to the cavity is arranged in the center of the flange cover body, a plug is arranged on the leak detection hole, and a heat insulating member is filled in the cavity.

[0007] Preferably, a manhole structure in the utility model is further configured as follows: a handle is welded on the outer side of the flange cover main body, and the counterweight block is provided with a through hole for the handle to pass through.

[0008] Preferably, a manhole structure in the utility model is further configured as follows: the through hole is configured in a rectangular shape.

[0009] Preferably, a manhole structure in the utility model is further configured as follows: the fixing members are bolts and nuts.

[0010] Preferably, a manhole structure in the utility model is further configured as follows: the counterweight block is arranged in a circular shape.

[0011] Preferably, a manhole structure in the utility model is further configured as follows: a sealing gasket is provided between the flange and the flange cover.

[0012] Preferably, a manhole structure in the utility model is further configured as follows: the thermal insulation element is glass wool.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the manhole structure in the utility model forms a whole by welding the conical plugging core and the flange cover main body, thereby greatly improving the assembly and disassembly efficiency; in addition, the utility model designs the plugging core into a conical structure, so it is more convenient for the plugging core to enter the connecting pipe; compared with the cylindrical plugging core in the prior art, the utility model can greatly reduce the requirements for the processing accuracy of the plugging core after improving the plugging core into a cone. The utility model also improves the structural strength of the manhole by arranging a cross rib plate in the conical plugging core, so that it can withstand higher pressure. In addition, the utility model also arranges a notch between the intersection of the cross rib plate and the flange cover main body so that the four chambers separated by the cross rib plate are interconnected, and a leak detection hole that is interconnected with the cavity is provided in the center of the flange cover main body to achieve leak detection. The utility model solves the technical problem of instability during the installation of the flange cover by arranging a counterweight block (after the plugging core and the flange cover main body are designed as a whole, the position of the lifting ear cannot be set on the plugging core, but can only be set on the flange cover main body, and the plugging core is set on one side of the flange cover main body. If the counterweight block is not set on the other side of the flange cover main body, the flange cover will be unstable and fall during installation, thereby forming a safety hazard).

Brief Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of the manhole structure in the utility model.

[0015] Figure 2 It is a structural schematic diagram of the flange cover in the utility model.

[0016] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0017] Figures 1 to 3 In: 1. flange cover, 10. flange cover body, 100. leak detection hole, 101. handle, 11. conical plugging core, 110. cone body, 111. baffle, 12. counterweight, 120. first through hole, 121. second through hole, 2. reaction vessel body, 3. connecting pipe, 4. flange, 5. fixing part, 6. sealing gasket, 7. lifting ear, 8. cavity, 9. cross rib plate, 90. notch. [Specific implementation method]

[0018] The manhole structure of the utility model is further described in detail below through specific embodiments.

[0019] Ginseng Figures 1 to 3As shown, a manhole structure comprises: a flange cover 1, a pipe 3 welded to a reaction vessel cylinder 2, and a flange 4 welded to the pipe 3, wherein the flange 4 is connected to the flange cover 1 by a plurality of fixing members 5, and in this embodiment, the fixing members 5 are bolts and nuts. A sealing gasket 6 is arranged between the flange 4 and the flange cover 1, so that the manhole structure has a good sealing performance. The flange cover 1 comprises: a flange cover body 10, a conical plugging core 11 welded to one side of the flange cover body 10, and a counterweight 12 welded to the other side of the flange cover body 10, wherein the counterweight 12 is arranged in a circular shape. After the counterweight 12 is arranged, the weight of the conical plugging core 11 on one side of the flange cover 1 and the counterweight 12 on the other side of the flange cover 1 are balanced, thereby avoiding the problem of unstable hoisting during hoisting. By welding the conical plugging core 11 to the flange cover body 10 to form a whole, the assembly and disassembly efficiency is greatly improved, and by designing the plugging core into a conical structure, it is easier for the plugging core to enter the pipe 3. A lifting ear 7 is provided above the flange cover body 10, and the conical plug 11 includes a cone 110 and a baffle 111 welded to the cone 110. The flange cover body 10, the cone 110 and the baffle 111 together form a cavity 8, and a cross rib plate 9 is provided in the cavity 8, which is respectively welded to the baffle 111 and the flange cover body 10, thereby greatly improving the structural strength of the manhole structure and enabling it to withstand higher pressure. A notch 90 is provided between the intersection of the cross rib plate 9 and the flange cover main body 10 so that the four chambers separated by the cross rib plate 9 are interconnected, a leak detection hole 100 communicating with the cavity 8 is provided in the center of the flange cover main body 10, and a first through hole 120 communicating with the leak detection hole 100 is provided on the counterweight block 12. Once leakage occurs at the welding point between the baffle plate 111 and the cone portion 110, the leaked medium will flow out through the notch 90 of the cross rib plate 9 and then pass through the leak detection hole 100 on the flange cover main body 10 and finally come out from the first through hole 120 on the counterweight block 12, thereby realizing leak detection. The cavity 8 is filled with a heat insulating member. In the present embodiment, the heat insulating member is glass wool. The glass wool can provide a good heat insulating effect to prevent the high temperature of the reaction vessel cylinder 2 from escaping through the manhole. A handle 101 is welded to the outer side of the flange cover main body 10. The counterweight block 12 is provided with a second through hole 121 for the handle 101 to pass through. In the present embodiment, the number of the handle 101 and the second through hole 121 are both two, and the second through hole 121 is arranged in a rectangular shape.

[0020] In summary, the manhole structure in the utility model has greatly improved its structural strength and safety performance through many structural improvements.

[0021] The above-mentioned embodiments are only illustrative of the principles and effects of the invention of the utility model, as well as some embodiments of its application, and are not intended to limit the invention of the utility model. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and these all fall within the scope of protection of the invention.

Claims

1. A manhole structure, comprising: A flange cover, a connecting pipe welded to a reaction vessel body and a flange welded to the connecting pipe, the flange and the flange cover being connected by a plurality of fixing parts, characterized in that: the flange cover comprises: a flange cover main body, a conical plugging core welded to one side of the flange cover main body and a counterweight block welded to the other side of the flange cover main body, a lifting ear is arranged above the flange cover main body, the conical plugging core comprises a cone part and a baffle welded to the cone part, the flange cover main body, the cone part and the baffle together form a cavity, a cross rib plate respectively welded to the baffle and the flange cover main body is arranged in the cavity, a notch is arranged between the intersection of the cross rib plate and the flange cover main body so that the four chambers separated by the cross rib plate are interconnected, a leak detection hole communicating with the cavity is arranged in the center of the flange cover main body, a plug is arranged on the leak detection hole, and the cavity is filled with a heat insulating member.

2. A manhole structure according to claim 1, characterized in that: A handle is welded on the outer side of the flange cover main body, and the counterweight block is provided with a through hole for the handle to pass through.

3. A manhole structure according to claim 2, characterized in that: The through hole is arranged in a rectangular shape.

4. A manhole structure according to claim 1, characterized in that: The fixing parts are bolts and nuts.

5. A manhole structure according to claim 1, characterized in that: The counterweight block is arranged in a circular shape.

6. A manhole structure according to claim 1, characterized in that: A sealing gasket is arranged between the flange and the flange cover.

7. A manhole structure according to claim 1, characterized in that: The thermal insulation member is glass wool.

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