Connecting flange for municipal pipeline

Abstract

The utility model discloses a connecting flange for a municipal pipeline, which comprises a pipeline, a flange plate is fixedly connected at the joint of the pipeline, a mounting hole is arranged on the peripheral surface of the flange plate, the connecting flange further comprises a pipeline sealing element, and the pipeline sealing element comprises a conical block which is fixedly arranged on one surface, close to the pipeline, of the flange plate. A threaded head is arranged at the end of the conical block, the outer surface of the conical block is sleeved with a rubber sleeve, the threaded head is in threaded connection with a tightening nut and a flange sealing piece, and the flange sealing piece is used for improving the sealing performance between the flange plates. The connecting flange for the municipal pipeline has the technical effect of being suitable for installation of pipelines with different calibers.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal pipelines, in particular to a connecting flange for municipal pipelines. Background Art

[0002] In modern urban construction, engineering pipelines often need split connection flanges to connect with each other. Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate, add flange gaskets between the two flange plates, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment already have flange plates, which also belong to flange connection. Because flange connection is easy to use and can withstand greater pressure, it is widely used in production and is commonly used in various pressure vessels and pipeline connections.

[0003] The patent with application number: 202022081988.2 discloses a split connection flange for a municipal engineering line pipeline, and the key points of its technical solution are: it includes a first flange and a second flange, the end of the first flange is evenly provided with a plurality of first threaded holes, the second flange is provided with a plurality of second threaded holes, the end of the first flange is provided with an annular groove, the end of the second flange is integrally provided with an annular flange at a position corresponding to the annular groove, the annular flange and the annular groove are interference fit, the end of the first flange is evenly provided with a plurality of positioning holes, the second flange is integrally provided with a plurality of positioning columns at positions corresponding to the plurality of positioning holes, the middle part of the first flange is integrally provided with a first boss, the middle part of the second flange is integrally provided with a second boss, fastening bolts are provided inside the first threaded hole and the second threaded hole, and the ends of the fastening bolts are threadedly connected with fastening nuts; the utility model solves the problems of poor sealing and slow assembly process of the existing split connection flange.

[0004] The flanges in the above-mentioned comparative documents cannot be installed and matched with pipes of different diameters during use, which results in a narrow application range of the flanges. It is necessary to strictly select appropriate flanges according to the diameter of the pipes for pipeline installation, which is inconvenient to use. In view of the above situation, we have launched connecting flanges for municipal pipes of different diameters. Utility Model Content

[0005] The utility model discloses a connecting flange for municipal pipelines, aiming to solve the technical problem that the flange cannot be installed and matched with pipelines of different diameters, which leads to a narrow application range of the flange and requires strict selection of a suitable flange according to the diameter of the pipeline for pipeline installation, which is inconvenient to use.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A connecting flange for a municipal pipeline comprises a pipeline, a flange fixedly connected to the pipeline interface, a mounting hole being provided on the outer peripheral surface of the flange, and a pipeline seal, wherein the pipeline seal comprises a conical block fixedly arranged on a side of the flange close to the pipeline, a threaded head being provided at the end of the conical block, a rubber sleeve being sleeved on the outer surface of the conical block, a tightening nut being threadedly connected to the threaded head, and a flange seal, wherein the flange seal is used to improve the sealing between the flanges.

[0008] The degree of extrusion of the rubber sleeve is adjusted by rotating the tightening nut. The closer the tightening nut is rotated to the flange, the larger the cross-sectional area of ​​the rubber sleeve is extruded, so that it is suitable for installation on pipes of different diameters to ensure its sealing.

[0009] In a preferred solution, the rubber sleeve is in the shape of a trumpet opening, and the outer surface of the rubber sleeve is grooved in a stepped manner. The rubber sleeve is used to block the pipes of different diameters.

[0010] The stepped grooves ensure that the outer surface of the rubber sleeve will deform after being compressed, so that it fits the inner wall of the pipe and ensures its blocking effect. The trumpet-shaped rubber sleeve can also be more convenient for installation in pipes of different diameters.

[0011] In a preferred embodiment, the flange seal includes a sealing groove opened on the other side of the flange plate, a sealing ring is fitted in the sealing groove, a plurality of sealing grooves are opened, and the diameter of the sealing grooves decreases continuously from the outside to the inside, and a plurality of sealing ridges are arranged on the left and right sides of the sealing ring, each of the sealing grooves has a "V-shaped" cross-section, and each of the sealing grooves has two corresponding sealing ridges.

[0012] By fitting and squeezing the sealing ring together with two flanges, the sealing convex strips on the outer surface of the sealing ring will be pressed into the sealing groove, and the two sealing convex strips will be squeezed into one sealing groove, thereby further improving the sealing effect of the sealing ring and avoiding leakage of the medium in the municipal pipeline.

[0013] As can be seen from the above, a connection flange for municipal pipelines includes a pipeline, a flange is fixedly connected at the pipeline interface, a mounting hole is opened on the outer peripheral surface of the flange, and a pipeline seal includes a conical block fixedly arranged on the side of the flange close to the pipeline, a threaded head is arranged at the end of the conical block, a rubber sleeve is sleeved on the outer surface of the conical block, a tightening nut is threadedly connected at the threaded head, and a flange seal is used to improve the sealing between the flanges. The connection flange for municipal pipelines provided by the utility model has the technical effect of being applicable to the installation of pipelines with different calibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The utility model is a schematic diagram of the exploded structure of a connecting flange for municipal pipelines.

[0015] Figure 2 The utility model is a schematic diagram of the assembly state of a flange plate and a rubber sleeve of a connecting flange for a municipal pipeline proposed by the utility model.

[0016] Figure 3 The utility model is a schematic diagram of the flange plate and rubber sleeve of a connecting flange for municipal pipelines in a separated state.

[0017] Figure 4 The utility model is a schematic diagram of a sealing ring of a connecting flange for a municipal pipeline.

[0018] In the attached figure: 1. Pipe; 2. Flange; 3. Mounting hole; 4. Conical block; 5. Threaded head; 6. Rubber sleeve; 7. Tightening nut; 8. Sealing groove; 9. Sealing ring; 10. Sealing convex strip. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] The connecting flange for municipal pipelines disclosed by the utility model cannot be installed and matched with pipelines of different diameters, which leads to a narrow application range of the flange. It is necessary to strictly select a suitable flange according to the diameter of the pipeline for pipeline installation, which is inconvenient to use.

[0022] Reference Figure 1 , Figure 2 and Figure 3 A connecting flange for a municipal pipeline comprises a pipeline 1, a flange 2 is fixedly connected to the interface of the pipeline 1, a mounting hole 3 is opened on the outer peripheral surface of the flange 2, and a pipeline seal comprises a conical block 4 fixedly arranged on a side of the flange 2 close to the pipeline 1, a threaded head 5 is arranged at the end of the conical block 4, a rubber sleeve 6 is sleeved on the outer surface of the conical block 4, and a tightening nut 7 is threadedly connected at the threaded head 5;

[0023] Flange seal, flange seal is used to improve the sealing between flange plates 2.

[0024] In this embodiment, during the laying of the municipal pipeline 1, it is necessary to butt the two sections of the pipeline 1. First, a rubber sleeve 6 can be put on the conical block 4 on one side of the flange 2, and the rubber sleeve 6 can be squeezed by rotating the tightening nut 7 to ensure that it is not easy to fall off. Then the conical block 4 is inserted into the pipeline 1, and the flange 2 is welded to the mouth of the pipeline 1. Since the rubber sleeve 6 will undergo a certain deformation, the gap between the pipeline 1 and the flange 2 can be tightly blocked, and the degree of squeezing the rubber sleeve 6 can be adjusted by rotating the tightening nut 7. The closer the tightening nut 7 is rotated to the flange 2, the larger the cross-sectional area of ​​the rubber sleeve 6 is squeezed, so that it is suitable for installation of pipelines 1 of different calibers to ensure its sealing. During the butt joint of the flange 2, the flange seal can be placed between the two flanges 2 and fixed and tightened with bolts.

[0025] Among them, the rubber sleeve 6 is in the shape of a trumpet opening, and the outer surface of the rubber sleeve 6 is stepped grooved. The rubber sleeve 6 is used to block pipes 1 of different diameters. The stepped grooves can ensure that the outer surface of the rubber sleeve 6 will deform after being compressed, so as to fit the inner wall of the pipe 1 to ensure its blocking effect. The trumpet-shaped rubber sleeve 6 can also be more convenient for installation in pipes 1 of different diameters.

[0026] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In a preferred embodiment, the flange seal includes a sealing groove 8 opened on the other side of the flange plate 2, a sealing ring 9 is attached to the sealing groove 8, and a hole groove corresponding to the mounting hole 3 is opened on the outer peripheral surface of the sealing ring 9.

[0027] In this embodiment, the sealing ring 9 can be placed between the two flanges 2. During the tightening of the flanges 2, the sealing ring 9 will be deformed into the sealing groove 8 to ensure its sealing performance, wherein the hole groove is used for the bolts to pass through.

[0028] There are several sealing grooves 8 , and the diameter of the sealing grooves 8 decreases from the outside to the inside, so that the number of sealing layers between the sealing ring 9 and the sealing grooves 8 can be increased.

[0029] Specifically, a plurality of sealing ridges 10 are arranged on the left and right sides of the sealing ring 9. The cross-section of each sealing groove 8 is "V-shaped", and there are two corresponding sealing ridges 10 in each sealing groove 8. When the two flanges 2 fit and squeeze the sealing ring 9, the sealing ridges 10 on the outer surface of the sealing ring 9 will be pressed into the sealing groove 8, and two sealing ridges 10 will be squeezed into one sealing groove 8, thereby further improving the sealing effect of the sealing ring 9 and avoiding leakage of the medium in the municipal pipeline.

[0030] Working principle: When in use, first put a rubber sleeve 6 on the conical block 4 on one side of the flange 2, and squeeze the rubber sleeve 6 by rotating the tightening nut 7 to ensure that it is not easy to fall off. The degree of squeezing the rubber sleeve 6 can be adjusted by rotating the tightening nut 7. The closer the tightening nut 7 is rotated to the flange 2, the larger the cross-sectional area of ​​the rubber sleeve 6 is squeezed, so that it is suitable for installation of pipes 1 of different diameters to ensure its sealing. Then, insert the conical block 4 into the pipe 1, and weld the flange 2 to the mouth of the pipe 1. Then, place the sealing ring 9 between the two flanges 2 and tighten it through the bolts through the mounting hole 3 to complete the docking work of the pipe 1.

[0031] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. The replacement can be a replacement of part of the structure, device, method step, or a complete technical solution. Equivalent replacement or change based on the technical solution of the utility model and its utility model concept should be included in the protection scope of the utility model.

Claims

1. A connecting flange for a municipal pipeline, comprising a pipeline (1), wherein a flange (2) is fixedly connected to the interface of the pipeline (1), and a mounting hole (3) is provided on the outer peripheral surface of the flange (2), wherein: Also includes: A pipe seal, the pipe seal comprising a conical block (4) fixedly arranged on a side of the flange (2) close to the pipe (1), a threaded head (5) being arranged at the end of the conical block (4), a rubber sleeve (6) being sleeved on the outer surface of the conical block (4), and a tightening nut (7) being threadedly connected at the threaded head (5); A flange seal is used to improve the sealing performance between the flange plates (2).

2. A connecting flange for municipal pipelines according to claim 1, characterized in that: The rubber sleeve (6) is in the shape of a trumpet opening, and the outer surface of the rubber sleeve (6) is grooved in a stepped manner. The rubber sleeve (6) is used to block the pipes (1) of different calibers.

3. A connecting flange for municipal pipeline according to claim 1, characterized in that: The flange seal comprises a sealing groove (8) formed on the other side of the flange plate (2), and a sealing ring (9) is fitted on the sealing groove (8).

4. A connecting flange for municipal pipeline according to claim 3, characterized in that: A plurality of sealing grooves (8) are provided, and the diameter of the sealing grooves (8) decreases continuously from the outside to the inside.

5. A connecting flange for municipal pipeline according to claim 4, characterized in that: A plurality of sealing convex strips (10) are provided on the left and right sides of the sealing ring (9).

6. A connecting flange for municipal pipeline according to claim 5, characterized in that: Each of the sealing grooves (8) has a V-shaped cross-section, and each of the sealing grooves (8) has two corresponding sealing convex strips (10).

7. A connecting flange for municipal pipeline according to claim 3, characterized in that: The outer peripheral surface of the sealing ring (9) is provided with a hole groove corresponding to the mounting hole (3).

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