Bolt sealing assembly

Abstract

The utility model relates to a bolt sealing assembly which is installed between blocking flanges on two adjacent components, the blocking flanges on the two components are a blocking flange I and a blocking flange II respectively, and the bolt sealing assembly comprises a bolt body, a nut, a sealing piece and a blocking plate. The end face of at least one of the first block flange and the second block flange is a pressure-bearing pressure face, the bolt body is arranged between the first block flange and the second block flange in a penetrating mode, and the head of the bolt body extends out of the block flanges to be connected with a nut. Or the bolt body is in threaded connection between the block flange I and the block flange II, the head of the bolt body is arranged in the block flange, and the end face of the block flange is provided with a blocking plate corresponding to the head of the bolt; at least one sealing piece is arranged on the bolt body in a penetrating mode and comprises a compression ring, a compression inclined face and a sealing ring, and the compression ring compresses the sealing ring through the compression inclined face to enable the sealing ring to deform. On the premise that the bolt connection mode is not damaged, the functions of rapid disassembly and replacement and pressure maintaining sealing can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt sealing, in particular to a bolt sealing assembly. Background Art

[0002] In recent years, the excavation diameter of shield machines has gradually increased, and the diameter of the shield machine itself also needs to be expanded, so the shield body and cutter head of the shield machine need to be manufactured in blocks. Take the shield body as an example: the shield body needs to be divided into blocks, each shield body block is processed and manufactured separately, and the shield body blocks are assembled and combined. The adjacent shield body blocks are connected and fixed with block flanges and bolts.

[0003] In some geological conditions, the shield cabin and earth cabin of the shield machine are required to withstand a certain pressure and have a pressure-maintaining function. Generally, the shield cabin is required to withstand a water pressure of 3-10 bar, and the bolts used between the shield blocks span the cabin. Therefore, the bolts are required to have not only the functions of tightening, detachability, and replacement, but also the functions of sealing and pressure maintenance.

[0004] Conventional bolt seals between shield blocks are usually made by thread sealant, welding plugs or sealing gaskets, but they cannot be disassembled and replaced without destroying the connection. Moreover, some sealing methods have poor sealing effects. For example, under the influence of long-term equipment vibration, the gasket may fail to seal. Summary of the invention

[0005] In order to solve the problem that the conventional bolt sealing structure has a weak sealing effect and is difficult to achieve pressure-maintaining sealing and rapid disassembly and replacement between flanges of the same segment, the utility model provides a bolt sealing assembly, which is used by a pressure ring, a sealing ring, a bolt and a nut, and is used in combination according to different sealing working conditions, so as to achieve rapid disassembly, replacement and pressure-maintaining sealing functions without destroying the connection form.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A bolt sealing assembly is installed between segmented flanges on two adjacent components to ensure a sealed connection between the two components, wherein the segmented flanges on the two components are segmented flange 1 and segmented flange 2, respectively, and include a bolt body, a nut, a sealing member and a plugging plate;

[0008] The end face of at least one of the segmented flange 1 and the segmented flange 2 is a pressure-bearing surface. According to the different distribution conditions of the pressure-bearing surface, the structural form of the bolt sealing assembly is also different. The bolt body is inserted between the segmented flange 1 and the segmented flange 2, and the head of the bolt body extends out of the segmented flange and is connected to the nut, thereby preventing the bolt body from falling off;

[0009] Or the bolt body is threadedly connected between the segmented flange 1 and the segmented flange 2, the bolt body head is placed in the segmented flange, and the segmented flange end surface is provided with the blocking plate corresponding to the bolt head, the blocking plate is suitable for sealing when the installation space on one side of the segmented flange is narrow, in this case, no nut needs to be installed on the bolt body, and the bolt body head is hidden in the segmented flange;

[0010] At least one sealing member is provided on the bolt body. The number of sealing members to be installed varies according to the distribution of the pressure-bearing surface. The sealing member includes a pressure ring, a compression slope and a sealing ring. One end face of the pressure ring is in contact with the pressure-bearing surface. The inner ring surface of the pressure ring and one end face of the pressure ring are chamfered to form a compression slope. The compression slope presses the sealing ring. The sealing ring is in close contact with the pressure-bearing surface and the bolt body to achieve a sealing effect.

[0011] Furthermore, the end faces of both the segmented flange 1 and the segmented flange 2 are pressure-bearing surfaces, that is, the end face of the segmented flange 1 and the end face of the segmented flange 2 are both pressure-bearing surfaces.

[0012] Furthermore, the bolt body passes through the segmented flange 1 and the segmented flange 2, and the bolt body head extends out of the segmented flange 1 or the segmented flange 2 and is threadedly connected with the nut, thereby realizing the connection between the bolt and the segmented flange;

[0013] Two seals are provided on the bolt body, which are respectively used for sealing the pressure-bearing surfaces on the segment flange 1 and the segment flange 2. The two seals are symmetrically distributed on the two pressure-bearing surfaces with the joint surface of the segment flange 1 and the segment flange 2 as the symmetry surface.

[0014] Furthermore, the bolt body is threadedly connected to the segment flange one and the segment flange two, and a seal is provided on the bolt body. The seal and the blocking plate are distributed on the two pressure-bearing surfaces with the joint surface of the segment flange one and the segment flange two as the boundary, and the blocking plate is arranged on the segment flange one or the segment flange two. At this time, a nut is not installed on the head of the bolt body, and there is no need to be restricted by a narrow installation environment.

[0015] Furthermore, only one of the segment flange 1 and the segment flange 2 has an end face that is a pressure-bearing surface, that is, the end face of the segment flange 1 or the segment flange 2 is a pressure-bearing surface.

[0016] Furthermore, the bolt body is connected with the nut after passing through the segment flange 1 and the segment flange 2, and a sealing member is provided on the bolt body, and the sealing member is in contact with the pressure-bearing surface of the segment flange 1 or the segment flange 2;

[0017] The bolt body is also provided with a sealing gasket, which is separated from the joint surface of the segment flange 1 and the segment flange 2 by an interval between the sealing gasket and the sealing member. The sealing gasket and the sealing member are in a relative relationship. On the premise that the sealing member fits the pressure-bearing surface of the segment flange, the sealing gasket fits the non-pressure-bearing surface of the segment flange.

[0018] Through the above technical solution, the beneficial effects of the utility model are:

[0019] The utility model has a reasonable structural design. According to the different arrangements of the pressure-bearing surfaces on the segmented flanges, the structural forms of the bolt sealing assembly are also different. The overall structure is simple, convenient and practical. By using the bolt body in conjunction with the nut, segmented flange one and segmented flange two can be conveniently connected and fixed. If the end faces of segmented flange one and segmented flange two are both pressure-bearing surfaces, two seals are installed on the bolt body, respectively used for sealing the two pressure-bearing surfaces; if only one of the end faces of segmented flange one and segmented flange two is a pressure-bearing surface, a seal is installed on the bolt body, used for sealing the one pressure-bearing surface.

[0020] When the installation environment is limited, the utility model can weld a plugging plate on the pressure-bearing surface of the segmented flange. The head of the bolt body is hidden in the segmented flange and there is no need to install a nut, which can effectively cope with the problem of a small installation environment.

[0021] The sealing principle of the utility model is to squeeze the compression ring through the compression force of the bolt, and the compression ring uses the compression inclined surface to compress the sealing ring, so that the sealing ring is elastically deformed toward the pressure-bearing surface and the bolt body at the same time, and then the sealing ring is in contact and compacted with the pressure-bearing surface and the bolt body, thereby improving the reliability of the seal and having a better sealing effect than conventional sealing forms.

[0022] The bolt sealing assembly of the utility model adopts a detachable connection structure when connected and installed with the block flange. The installation is convenient and quick. It can realize the functions of rapid disassembly, replacement and pressure-maintaining sealing without destroying the connection form, ensuring that there will be no leakage at the block flange connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a structural schematic diagram of a bolt sealing assembly according to a first embodiment of the present invention.

[0024] Figure 2 This is a force analysis diagram of a sealing ring in Embodiment 1 of a bolt sealing assembly of the utility model.

[0025] Figure 3 The utility model is a cross-sectional view of a pressure ring in a first embodiment of a bolt sealing assembly.

[0026] Figure 4 This is a structural schematic diagram of a second embodiment of a bolt sealing assembly of the utility model.

[0027] Figure 5 This is one of the structural schematic diagrams of the third embodiment of a bolt sealing assembly of the utility model.

[0028] Figure 6 This is the second structural schematic diagram of the third embodiment of a bolt sealing assembly of the utility model.

[0029] The numbers in the accompanying drawings are: 1 segment flange, 11 segment flange one, 12 segment flange two, 2 pressure-bearing pressure surface, 3 non-pressure-bearing pressure surface, 4 bolt body, 5 nut, 6 sealing member, 61 pressure ring, 62 compression ramp, 63 sealing ring, 7 blocking plate, 8 sealing gasket. DETAILED DESCRIPTION

[0030] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings:

[0031] A bolt sealing assembly is installed between segmented flanges 1 on two adjacent components to realize flange connection installation of the two adjacent components. The segmented flanges 1 on the two components are segmented flange 11 and segmented flange 2 12, respectively. The bolt sealing assembly is used to realize a sealed connection between segmented flange 11 and segmented flange 2 12.

[0032] It should be noted that at least one of the end faces of the segmented flange 11 and the segmented flange 2 12 is a pressure-bearing surface 2, that is, the arrangement of the pressure-bearing surface 2 is divided into two situations: one is that the end faces of the segmented flange 11 and the segmented flange 2 12 are both pressure-bearing surfaces 2. The second is that the end face of the segmented flange 11 is the pressure-bearing surface 2, in which case the end face of the segmented flange 2 12 can be understood as a non-pressure-bearing surface 3, or the end face of the segmented flange 2 12 is the pressure-bearing surface 2, in which case the end face of the segmented flange 11 can be understood as a non-pressure-bearing surface 3.

[0033] The bolt seal assembly includes a bolt body 4, a nut 5, a seal 6 and a plug 7, and at least one seal 6 is provided on the bolt body 4. The combination of the above components can be used for the connection and installation between the segment flange 1 11 and the segment flange 2 12. Since the distribution of the pressure-bearing pressure surface 2 on the segment flange 1 11 and the segment flange 1 is different, the connection combination forms between the components are also different, but they can all play the role of connection and sealing.

[0034] Embodiment 1:

[0035] In this embodiment, the end faces of both the segmented flange 11 and the segmented flange 2 12 are pressure-bearing surfaces 2, and there is sufficient installation space on both sides of the segmented flange 11 and the segmented flange 2 12. At this time, the structure of the bolt sealing assembly is as follows: Figure 1 shown.

[0036] The bolt body 4 is passed through the segment flange 11 and the segment flange 2 12, and the head of the bolt body 4 extends out of the segment flange 1 and is connected with the nut 5, that is, the bolt body 4 passes through the segment flange 11 and the segment flange 2 12, and the head of the bolt body 4 extends out of the segment flange 11 or the segment flange 2 12 and is threadedly connected with the nut 5.

[0037] Two seals 6 are provided on the bolt body 4, and the two seals 6 are respectively used to seal the pressure-bearing surfaces 2 on the segmented flange 1 11 and the segmented flange 2 12. The two seals 6 are symmetrically distributed on the two pressure-bearing surfaces 2 with the joint surface of the segmented flange 1 11 and the segmented flange 2 12 as the symmetry surface.

[0038] like Figure 2 and Figure 3 As shown, each seal 6 includes a pressure ring 61, a compression slope 62 and a sealing ring 63. The pressure ring 61 is an annular body. The material of the pressure ring 61 includes but is not limited to carbon steel, alloy, non-metal and other materials. One end face of the pressure ring 61 is in contact with the pressure-bearing pressure surface 2. The inner ring surface of the pressure ring 61 and one end face of the pressure ring 61 are chamfered to form a compression slope 62. The compression slope 62 compresses the sealing ring 63, and the compression deformation of the sealing ring 63 is used to ensure the sealing effect.

[0039] After the nut 5 and the bolt body 4 are tightened together, the bolt clamping force F is transmitted through the pressure ring 61 and decomposed into F1 and F2, so that the sealing ring 63 is in contact and compacted with the bolt body 4 and the segmented flange 1, thereby improving the reliability of the seal. When the pressure ring 61 uses the compression inclined surface 62 to compress the sealing ring 63, the sealing ring 63 is compressed and elastically deformed, and the elastic deformation is simultaneously directed toward the pressure-bearing pressure surface 2 and the bolt body 4, ensuring the uniformity of the seal.

[0040] Embodiment 2:

[0041] This embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that the end faces of both the segmented flange 11 and the segmented flange 2 12 are also pressure-bearing surfaces 2, but the installation space on one side of the segmented flange 11 or the segmented flange 2 12 is limited. In this case, the structure of the bolt sealing assembly is as follows.

[0042] The bolt body 4 is threadedly connected between the segmented flange 11 and the segmented flange 2 12, the head of the bolt body 4 is placed in the segmented flange 1, and a plugging plate 7 corresponding to the bolt head is arranged on the end surface of the segmented flange 1. That is, the bolt body 4 is threadedly connected with the segmented flange 11 and the segmented flange 2 12.

[0043] A seal 6 is provided on the bolt body 4. The seal 6 and the plugging plate 7 are distributed on the two pressure-bearing surfaces 2 with upper and lower intervals, with the joint surfaces of the segment flange 11 and the segment flange 2 12 as the boundary. The plugging plate 7 can be arranged on the segment flange 1 11 or the segment flange 2 12.

[0044] In this embodiment, the installation space of the segmented flange 11 is limited. At this time, the blocking plate 7 is fixed to the segmented flange 11 by welding to seal one of the pressure-bearing surfaces 2. The sealing member 6 is also fitted with the pressure-bearing surface 2 of the segmented flange 2 12 to seal it, thereby ensuring the airtightness of the two pressure-bearing surfaces 2. Figure 4 shown.

[0045] Embodiment three:

[0046] This embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that only one of the end faces of the segmented flange 11 and the segmented flange 2 12 is the pressure-bearing surface 2. In this case, the structure of the bolt sealing assembly is as follows.

[0047] The bolt body 4 is connected with a nut 5 after passing through the segmented flange 1 11 and the segmented flange 2 12. A sealing member 6 is provided on the bolt body 4, and the sealing member 6 is in contact with the pressure-bearing surface 2 of the segmented flange 1 11 or the segmented flange 2 12. As for the end face of the segmented flange 1 11 or the segmented flange 2 12 that is not the pressure-bearing surface 2, a sealing gasket 8 is sleeved on the bolt body 4 to achieve sealing. The sealing gasket 8 and the sealing member 6 are distributed on the two end faces of the segmented flange 1 at intervals with the joint surface of the segmented flange 11 and the segmented flange 2 12 as the boundary, that is, the sealing gasket 8 is in contact with the non-pressure-bearing surface 3.

[0048] In this embodiment, the end face of the segmented flange 2 12 is the pressure-bearing surface 2, and the end face of the segmented flange 1 11 is the non-pressure-bearing surface 3. At this time, a sealing member 6 on the bolt body 4 is in contact with the end face of the segmented flange 2 12, and the sealing gasket 8 is in contact with the end face of the segmented flange 1 11. Figure 5 After the nut 5 is tightened, the nut 5 squeezes the sealing gasket 8, and the sealing member 6 is in close contact with the pressure-bearing surface 2 on the segmented flange 2 12 at the same time.

[0049] Alternatively, the end face of the segmented flange 11 is the pressure-bearing surface 2, while the end face of the segmented flange 2 12 is the non-pressure-bearing surface 3. In this case, a sealing member 6 on the bolt body 4 fits with the end face of the segmented flange 11, and a sealing gasket 8 fits with the end face of the segmented flange 2 12. Figure 6 shown.

[0050] The utility model has different structural forms of the bolt sealing assembly according to the different arrangements of the pressure-bearing surface 2, and can be applied to a variety of connection forms and scenarios. It can achieve rapid disassembly and replacement without destroying the connection form, as well as pressure-maintaining sealing.

[0051] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A bolt seal assembly, installed between segmented flanges (1) on two adjacent components, the segmented flanges (1) on the two components are segmented flange 1 (11) and segmented flange 2 (12), characterized in that: It comprises a bolt body (4), a nut (5), a sealing member (6) and a blocking plate (7); The end face of at least one of the segmented flange 1 (11) and the segmented flange 2 (12) is a pressure-bearing surface (2); the bolt body (4) is inserted between the segmented flange 1 (11) and the segmented flange 2 (12); the head of the bolt body (4) protrudes from the segmented flange (1) and is connected to the nut (5); or the bolt body (4) is threadedly connected between the segmented flange 1 (11) and the segmented flange 2 (12), the head of the bolt body (4) is placed in the segmented flange (1), and the end surface of the segmented flange (1) is provided with the blocking plate (7) corresponding to the bolt head; At least one sealing member (6) is provided on the bolt body (4), and the sealing member (6) comprises a pressure ring (61), a compression bevel (62) and a sealing ring (63). One end face of the pressure ring (61) is in contact with the pressure-bearing surface (2), and an inner ring surface of the pressure ring (61) and one end face of the pressure ring (61) are chamfered to form a compression bevel (62), and the compression bevel (62) presses the sealing ring (63).

2. A bolt sealing assembly according to claim 1, characterized in that: The end faces of both the segmented flange 1 (11) and the segmented flange 2 (12) are pressure-bearing surfaces (2).

3. A bolt sealing assembly according to claim 2, characterized in that: The bolt body (4) passes through the segmented flange 1 (11) and the segmented flange 2 (12), and the head of the bolt body (4) protrudes out of the segmented flange 1 (11) or the segmented flange 2 (12) and is threadedly connected to the nut (5); The bolt body (4) is provided with two sealing members (6), and the two sealing members (6) are symmetrically distributed on the two pressure-bearing surfaces (2) with the joint surfaces of the first segment flange (11) and the second segment flange (12) as symmetric surfaces.

4. A bolt sealing assembly according to claim 2, characterized in that: The bolt body (4) is threadedly connected to the segmented flange 1 (11) and the segmented flange 2 (12); a sealing member (6) is provided on the bolt body (4); the sealing member (6) and the blocking plate (7) are distributed on the two pressure-bearing surfaces (2) with the joint surface of the segmented flange 1 (11) and the segmented flange 2 (12) as the boundary, and the blocking plate (7) is arranged on the segmented flange 1 (11) or the segmented flange 2 (12).

5. The bolt sealing assembly according to claim 1, characterized in that: Only one of the segmented flange 1 (11) and the segmented flange 2 (12) has an end face that is a pressure-bearing surface (2).

6. A bolt sealing assembly according to claim 5, characterized in that: The bolt body (4) passes through the segmented flange 1 (11) and the segmented flange 2 (12) and is connected to the nut (5). A sealing member (6) is provided on the bolt body (4). The sealing member (6) is in contact with the pressure-bearing surface (2) of the segmented flange 1 (11) or the segmented flange 2 (12). A sealing gasket (8) is also provided on the bolt body (4). The sealing gasket (8) and the sealing member (6) are distributed on both end surfaces of the segment flange (1) at intervals with the joint surface of the segment flange 1 (11) and the segment flange 2 (12) as the boundary.

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