CN221800936U - A flange - Google Patents

Abstract

The utility model relates to the technical field of flanges, and discloses a flange, which comprises a first flange, a second flange and a third flange, wherein the first flange is a fixed flange which is welded with a connecting pipe into a whole, the second flange and the third flange are movable flanges which are movably sleeved on the outer wall of the connecting pipe, the second flange is arranged between the first flange and the second flange, a first sealing ring is arranged between the first flange and the second flange, a second sealing ring is arranged between the second flange and the third flange, corresponding fixing holes are formed in the first flange, the second flange and the third flange, and the first flange, the second flange and the third flange are connected through bolts and nuts. According to the utility model, the first sealing ring and the second sealing ring are respectively arranged between the fixed flange and the movable flange and between the two movable flanges through the fixed flange and the two movable flanges, so that the tightness of connection is ensured, and when overhauling, the two movable flanges can be directly dismounted, so that the disassembly and the overhaul are convenient.

Description

A flange

Technical Field

The utility model relates to the technical field of flanges, in particular to a flange.

Background Art

Flange, also called flange flange or flange, is a part that connects pipes to each other. It is usually used to connect pipe ends. There are holes on the flange, and the two flanges are connected tightly by bolts. It is the most common connection in pipeline engineering. Flanges are also commonly used in pipeline connections in hydropower plants. Existing flanges are usually used in pairs, and the two flanges are usually welded and fixed to the pipe ends respectively, and then the two flanges are connected tightly by bolts. However, in actual applications, it is found that when the two flanges are welded and fixed to the pipe ends, it is not convenient to disassemble and assemble the pipeline during maintenance. Therefore, it is necessary to improve the existing flanges.

Utility Model Content

The utility model aims to solve the above problems and provides a flange, wherein two flanges are movable flanges, which are convenient for disassembly, assembly and maintenance.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a flange, including a first flange, a second flange and a third flange, the first flange is a fixed flange, which is welded to a connecting pipe as a whole, the second flange and the third flange are movable flanges, which are movably sleeved on the outer wall of the connecting pipe, the second flange is arranged between the first flange and the second flange, a first sealing ring is arranged between the first flange and the second flange, a second sealing ring is arranged between the second flange and the third flange, the first flange, the second flange and the third flange are provided with corresponding fixing holes, and the first flange, the second flange and the third flange are connected by bolts and nuts.

Furthermore, the inner diameter of the second flange is 0.8 mm to 1.5 mm larger than the outer diameter of the connecting pipe.

Furthermore, the first sealing ring is an annular sealing gasket.

Furthermore, the second sealing ring is an O-ring.

Furthermore, the first sealing ring and the second sealing ring are made of rubber.

Furthermore, the inner hole of the second flange at one end away from the first flange is a chamfered structure, and the chamfer is 45°*5.

Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

The flange of the utility model comprises a first flange, a second flange and a third flange. The first flange is a fixed flange, which is welded and fixed to a connecting pipe. The second flange and the third flange are movable flanges. A first sealing ring is arranged between the first flange and the second flange, and a second sealing ring is arranged between the second flange and the third flange, so that the tightness of the connection is ensured. Due to the arrangement of the movable flange, the disassembly, assembly and maintenance of the pipeline are convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

In the figure: 1-first flange, 2-second flange, 3-third flange, 4-first sealing ring, 5-second sealing ring, 6-bolt, 7-nut, 8-connecting pipe.

DETAILED DESCRIPTION

In order to make the technical personnel of the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by the technical personnel in the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

As shown in FIG1 , a flange includes a first flange 1, a second flange 2 and a third flange 3. The first flange 1 is a fixed flange, which is welded to a connecting pipe 8 as a whole. The second flange 2 and the third flange 3 are movable flanges, which are movably sleeved on the outer wall of the connecting pipe 8. The second flange 2 is arranged between the first flange 1 and the second flange 2. A first sealing ring 4 is arranged between the first flange 1 and the second flange 2. A second sealing ring 5 is arranged between the second flange 2 and the third flange 3. The first flange 1, the second flange 2 and the third flange 3 are provided with corresponding fixing holes. The first flange 1, the second flange 2 and the third flange 3 are connected by bolts 6 and nuts 7.

As a preferred embodiment, the inner diameter of the second flange 2 is 0.8 mm to 1.5 mm larger than the outer diameter of the connecting pipe 8. This structure facilitates the second flange 2 to be inserted into the outside of the connecting pipe 8.

As a preferred embodiment, the first sealing ring 4 is an annular sealing gasket. The annular sealing gasket can be bonded and fixed by glue, and the sealing between the first flange 1 and the second flange 2 is enhanced by providing the annular sealing gasket.

As a preferred embodiment, the second sealing ring 5 is an O-type sealing ring. Since the O-type sealing ring is arranged between the two movable flanges, the second flange 2 and the third flange 3, a good sealing effect is achieved to prevent water leakage.

As a preferred embodiment, the first sealing ring 4 and the second sealing ring 5 are made of rubber material. Rubber material is soft and has good sealing performance.

As a preferred embodiment, the inner hole of the second flange 2 away from the first flange 1 is a chamfered structure, and the chamfer is 45°*5. This structure forms a packing groove, which is conducive to pressing the O-ring and further improving the sealing performance.

During installation, the annular sealing gasket is connected and fixed to the first flange 1 by glue, the second flange 2 and the third flange 3 are sleeved on the outside of the connecting pipe 8, and the O-type sealing ring is placed between the second flange 2 and the third flange 3. Then, bolts 6 are put into the fixing holes of the first flange 1, the second flange 2 and the third flange 3, and the nuts 7 are tightened to fix them, so that the annular sealing gasket and the O-type sealing ring are pressed tightly, ensuring the tightness of the connection between the first flange 1 and the second flange 2 and the second flange 2 and the third flange 3. When disassembly and maintenance is required, the bolts 6 and nuts 7 can be removed to remove the two movable second flanges 2 and the third flange 3, which is convenient for workers to repair.

The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims (6)

1. A flange, characterized in that: including first flange, second flange and third flange, first flange is fixed flange, and it welds as an organic wholely with the connecting pipe, second flange and third flange are movable flange, and its activity cup joints the outer wall at the connecting pipe, the second flange is located first flange with between the second flange, first flange with be equipped with first sealing washer between the second flange, the second flange with be equipped with the second sealing washer between the third flange, first flange, second flange and third flange are equipped with corresponding fixed orifices, connect through bolt and nut between first flange, second flange and the third flange.

2. A flange according to claim 1, wherein: the inner diameter of the second flange is 0.8mm-1.5mm larger than the outer diameter of the connecting pipe.

3. A flange according to claim 1, wherein: the first sealing ring is an annular sealing gasket.

4. A flange according to claim 1, wherein: the second sealing ring is an O-shaped sealing ring.

5. A flange according to claim 1, wherein: the first sealing ring and the second sealing ring are made of rubber materials.

6. A flange according to claim 2, wherein: the inner hole of one end of the second flange far away from the first flange is of a chamfering structure, and the chamfering angle is 45 degrees or 5 degrees.