A special material loose sleeve manhole structure

Abstract

The utility model belongs to the field of chemical production technology, and specifically relates to a special material ring loose sleeve manhole structure, including a manhole pipe, the outer side of the manhole pipe is connected to the manhole flange ring by sliding up and down, the top of the manhole pipe and the top of the manhole flange ring are rotatably connected with a flange cover, the manhole pipe is made of titanium or zirconium, the bottom of the flange cover is close to the manhole pipe and is made of titanium or zirconium, a left blocking structure and a right blocking structure are arranged between the manhole pipe and the manhole flange ring to block the rotation of the manhole flange ring, a manhole flange sealing ring is arranged between the manhole flange ring and the flange cover, and the left blocking structure includes a left flange positioning plate arranged at the bottom of the manhole flange ring and a left azimuth fixing plate fixed to the outer side of the manhole pipe, and the left azimuth fixing plate and the left flange positioning plate are arranged in a close relationship. The utility model can ensure corrosion resistance, reduce costs, and ensure structural strength and sealing.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production, and specifically relates to a loose-ring manhole structure for special materials. Background Art

[0002] In the chemical production process, some special media, such as strong acid, strong alkali or medium under high temperature and high pressure, are extremely corrosive to the equipment, which requires that the equipment materials must be able to resist the influence of these corrosive media. Traditional ordinary carbon steel and high alloy steel are often difficult to meet the requirements in these special environments. Therefore, special materials such as titanium and zirconium have become ideal choices;

[0003] However, the use of special metals such as titanium and zirconium also brings a series of challenges. First, these materials are expensive, which leads to high equipment costs and increases production costs. Second, the allowable stress of titanium and zirconium is relatively low, especially under high-temperature operating conditions, the allowable stress will be further reduced, which requires the size of the equipment flange and flange cover to be increased accordingly to meet the strength requirements. In addition, since titanium and zirconium cannot be directly welded to carbon steel and high-alloy steel, traditional cladding structures cannot be applied to these materials, further increasing the difficulty of design and manufacturing.

[0004] In order to solve the above problems, the industry has been exploring new solutions. Traditional equipment manhole structures are mostly made of integral special materials. Although they can ensure the corrosion resistance of the parts in contact with the medium, the overall cost is high and the structural strength is difficult to guarantee;

[0005] In view of the deficiencies in the prior art, the present application proposes a novel loose-ring manhole structure to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a special material loose ring sleeve manhole structure, which can ensure corrosion resistance, reduce costs, and ensure structural strength and sealing.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A special material ring loose sleeve manhole structure, comprising a manhole pipe, the outer side of the manhole pipe is slidably connected to a manhole flange ring up and down, the top of the manhole pipe and the top of the manhole flange ring are rotatably connected to a flange cover, the manhole pipe is made of titanium or zirconium, and the bottom of the flange cover near the manhole pipe is made of titanium or zirconium;

[0009] A left blocking structure and a right blocking structure are provided between the manhole pipe and the manhole flange ring, for blocking the manhole flange ring from rotating.

[0010] A manhole flange sealing ring is arranged between the manhole flange ring and the flange cover.

[0011] The left blocking structure includes a left flange positioning plate arranged at the bottom of the manhole flange ring and a left azimuth fixing plate fixed on the outside of the manhole pipe, and the left azimuth fixing plate and the left flange positioning plate are arranged in close contact.

[0012] The right side blocking structure includes a right side flange positioning plate arranged at the bottom of the manhole flange ring and a right side azimuth fixing plate fixed to the outside of the manhole connecting pipe, and the right side azimuth fixing plate is arranged in close contact with the right side flange positioning plate, the left side azimuth fixing plate and the right side azimuth fixing plate are on the same side, and the left side flange positioning plate and the right side flange positioning plate are on the same side.

[0013] A manhole accessory is also arranged on the outer side of the manhole pipe.

[0014] Assembly holes are evenly arranged inside the manhole flange ring and the flange cover and near the edge, and bolts are threadedly connected in the assembly holes.

[0015] The technical effects achieved by the utility model are:

[0016] The utility model adopts special materials such as titanium and zirconium for the part in contact with the medium to ensure corrosion resistance, and adopts ordinary carbon steel for the other parts to reduce the cost. The flange cover can adopt a composite plate or lining structure to further reduce the cost while ensuring the structural strength and sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure between the flange cover, the right azimuth fixing plate and the left flange positioning plate in the utility model;

[0019] Figure 3 This utility model Figure 1 A is an enlarged view of the middle figure;

[0020] Figure 4 This utility model Figure 1 Enlarged view of B.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Manhole pipe; 2. Manhole flange ring; 3. Manhole flange sealing ring; 4. Flange cover; 5. Left side positioning plate; 6. Left side flange positioning plate; 7. Right side positioning plate; 8. Right side flange positioning plate; 9. Manhole accessories; 10. Assembly hole. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0024] like Figure 1-4 As shown, a special material ring loose sleeve manhole structure includes a manhole pipe 1, the manhole pipe 1 is used to be welded on the equipment cylinder, the manhole pipe 1 is made of the same special material as the cylinder, the outer side of the manhole pipe 1 is slidably connected to the manhole flange ring 2 up and down, the manhole flange ring 2 can be made of ordinary carbon steel, the cost is low and the structural strength can be guaranteed, and the inner diameter is slightly larger than the outer diameter of the manhole pipe 1, so that it can slide in the length direction of the manhole pipe 1, that is, the up and down direction;

[0025] The top of the manhole pipe 1 and the top of the manhole flange ring 2 are rotatably connected with a flange cover 4, see the attached Figure 1 and attached Figure 3 As shown, a manhole flange sealing ring 3 is arranged between the manhole flange ring 2 and the flange cover 4. The material of the manhole flange sealing ring 3 is the same as that of the manhole pipe 1, and is welded to the manhole pipe 1, so that the same materials are welded to achieve reliable connection. Assembly holes 10 are evenly arranged inside the manhole flange ring 2 and the flange cover 4 and near the edge position, and bolts are threadedly connected in the assembly holes 10. Through this arrangement, the manhole flange ring 2 and the flange cover 4 can be threadedly connected in the assembly holes 10 by bolts, thereby achieving the fixation of the manhole flange ring 2 and the flange cover 4;

[0026] The manhole pipe 1 is made of titanium or zirconium, and the bottom of the flange cover 4 near the manhole pipe 1 is made of titanium or zirconium. The cylinder of the equipment is made of some special metals, such as titanium and zirconium. Therefore, the manhole pipe 1 is made of the same material as the cylinder, so that the welding strength of the manhole pipe 1 and the cylinder is higher. The lower part of the flange cover 4 is made of the same material as the cylinder, that is, the part in contact with the medium is made of titanium or zirconium, and the rest can be made of ordinary carbon steel and other materials to ensure the cost;

[0027] A manhole accessory 9 is also provided on the outside of the manhole pipe 1. The manhole accessory 9 can be manufactured according to the corresponding pressure and nominal diameter with reference to the manhole standard. Some dimensions are related to the flange cover 4 and manhole flange ring 2 used, and are fine-tuned according to the manhole standard.

[0028] A left blocking structure and a right blocking structure are provided between the manhole pipe 1 and the manhole flange ring 2 to prevent the manhole flange ring 2 from rotating.

[0029] See attached Figure 1 and attached Figure 2 The left blocking structure includes a left flange positioning plate 6 arranged at the bottom of the manhole flange ring 2 and a left azimuth fixing plate 5 fixed to the outside of the manhole pipe 1, and the left azimuth fixing plate 5 and the left flange positioning plate 6 are fitted together;

[0030] The left side orientation fixing plate 5 is welded to the manhole pipe 1, and its material is the same as that of the manhole pipe 1, while the material of the left side flange positioning plate 6 can be ordinary carbon steel. When the manhole flange ring 2 rotates toward one side, it can be blocked by the cooperation of the left side orientation fixing plate 5 and the left side flange positioning plate 6 to limit its rotation.

[0031] According to the above structure, refer to the attached Figure 1 and attached Figure 2 The right blocking structure includes a right flange positioning plate 8 arranged at the bottom of the manhole flange ring 2 and a right azimuth fixing plate 7 fixed to the outside of the manhole pipe 1, and the right azimuth fixing plate 7 is fitted with the right flange positioning plate 8;

[0032] Like the left azimuth fixing plate 5 and the left flange positioning plate 6, the right azimuth fixing plate 7 is welded to the manhole pipe 1, and the material of the right azimuth fixing plate 7 is the same as that of the manhole pipe 1, while the right flange positioning plate 8 can be made of ordinary carbon steel. When the manhole flange ring 2 rotates toward the other side, the right azimuth fixing plate 7 and the right flange positioning plate 8 can be used to block and limit its rotation;

[0033] In this way, the manhole flange ring 2 is restricted from rotating clockwise and counterclockwise, so that the manhole flange ring 2 can only slide up and down.

[0034] See attached Figure 2 As shown, the left azimuth fixing plate 5 and the right azimuth fixing plate 7 are on the same side, and the left flange positioning plate 6 and the right flange positioning plate 8 are on the same side, and the left azimuth fixing plate 5 and the right azimuth fixing plate 7 are adjacent to each other. Figure 2 The lower part of the left flange positioning plate 6 and the right flange positioning plate 8 are located adjacent to Figure 2 The upper part of the manhole flange ring 2 is restricted from rotating when the manhole flange ring 2 is subjected to force.

[0035] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A special material loose ring manhole structure, comprising a manhole pipe (1), characterized in that: The outer side of the manhole pipe (1) is slidably connected to a manhole flange ring (2) up and down, and the top of the manhole pipe (1) and the top of the manhole flange ring (2) are rotatably connected to a flange cover (4), the manhole pipe (1) is made of titanium or zirconium, and the bottom of the flange cover (4) near the manhole pipe (1) is made of titanium or zirconium; A left blocking structure and a right blocking structure are provided between the manhole pipe (1) and the manhole flange ring (2) to block the rotation of the manhole flange ring (2).

2. A special material loose sleeve manhole structure according to claim 1, characterized in that: A manhole flange sealing ring (3) is provided between the manhole flange ring (2) and the flange cover (4).

3. A special material loose sleeve manhole structure according to claim 1, characterized in that: The left-side blocking structure comprises a left-side flange positioning plate (6) arranged at the bottom of the manhole flange ring (2) and a left-side orientation fixing plate (5) fixed to the outside of the manhole pipe (1), and the left-side orientation fixing plate (5) and the left-side flange positioning plate (6) are arranged in close contact with each other.

4. A special material loose sleeve manhole structure according to claim 3, characterized in that: The right side blocking structure comprises a right side flange positioning plate (8) arranged at the bottom of the manhole flange ring (2) and a right side orientation fixing plate (7) fixed to the outside of the manhole pipe (1), and the right side orientation fixing plate (7) is arranged in close contact with the right side flange positioning plate (8), the left side orientation fixing plate (5) and the right side orientation fixing plate (7) are on the same side, and the left side flange positioning plate (6) and the right side flange positioning plate (8) are on the same side.

5. A special material loose ring manhole structure according to claim 1, characterized in that: A manhole attachment (9) is also provided on the outer side of the manhole pipe (1).

6. A special material loose ring manhole structure according to claim 1, characterized in that: Assembly holes (10) are evenly arranged inside and near the edge of the manhole flange ring (2) and the flange cover (4), and bolts are connected to the internal threads of the assembly holes (10).

Images