CN205244676U - Dual -seal structure clamp formula flange - Google Patents

Abstract

This utility model discloses a double-sealing clamp-type flange, including a pair of clamps connected on both sides by bolts and nuts. The clamps are characterized by sealing structures at both ends, comprising a pair of flange sleeves that mate with the clamps at both ends, and a flange sleeve located outside the pipe. An environmental sealing ring and a flow channel sealing ring are provided between flange sleeve one and flange sleeve two, with the flow channel sealing ring mates with the flow channel on the clamps. The inner wall of the flow channel of the clamps is provided with an anti-corrosion layer. The flange structure provided by this utility model is used to achieve rapid pipe installation and double sealing protection. It is a material-saving, quick-installation, well-sealing, and corrosion-resistant clamp-type flange.

Description

A clamp-type flange with a double-seal structure

technical field

The utility model relates to the design of a novel double-seal structure clamp-type flange joint, which is suitable for high-pressure and pipeline transmission systems containing corrosive media in chemical industries such as seabed oil and natural gas, and ensures fast connection, tightness and corrosion resistance. sex.

Background technique

With the increasing demand for domestic and international oil, the intensity of offshore oil exploitation has been continuously increased. As a special equipment for material transportation, pipelines are widely used in machinery, petroleum, chemical industry, metallurgy and other industries, and play an important role in modern industrial production and people's lives. However, with the continuous development of modern industry, the working conditions of the pipeline system often become extremely complex and harsh, the pipeline is not easy to install in a complex environment, and the installation of ordinary flanges requires a lot of work and is easy to leak. Flange forgings are one of the indispensable important parts in the oil extraction system. As the installation of the pipeline system becomes more difficult, it finally makes it more difficult to align the flanges during installation. During the transmission of media, especially oil, natural gas and other media containing H ₂ S, CO ₂ and other corrosive gases, leakage occurs due to installation and sealing, which seriously endangers the environment and the safety of people's lives and property.

Utility model content

The problem to be solved by the utility model is to provide a clamp type flange which is easy to install, light in weight, has a sealing structure and is corrosion-resistant.

In order to solve the above problems, the utility model provides a clamp-type flange with a double-seal structure, which includes a pair of clamps, and the two sides of the clamps are connected by bolts and nuts. There is a sealing structure, the sealing structure includes a pair of flange joints that are arranged at the upper and lower ends of the hoop to match the hoop, and a flange ferrule located on the outside of the pipeline; the first flange joint and the second flange joint An environmental sealing ring and a flow channel sealing ring are arranged between them, and the flow channel sealing ring cooperates with the flow channel on the hoop; the inner wall of the flow channel of the hoop is provided with an anti-corrosion layer.

Preferably, a pressure measuring device is provided between the environment sealing ring and the flow channel sealing ring.

Preferably, a gasket set consisting of an outer spherical gasket and an inner spherical gasket is provided between the nuts at both ends of the bolt and the hoop.

Preferably, the nut is a spherical nut.

The flange structure provided by the utility model is used to realize quick installation and double sealing protection of pipelines, and is a clamp-type flange which saves materials, can be installed quickly, has good sealing performance and is corrosion-resistant.

Description of drawings

Fig. 1 is the perspective view of the front view of a kind of double sealing structure clamp type flange that the utility model provides;

Fig. 2 is a top view of a clamp type flange with double sealing structure provided by the utility model;

Figure 3 is a top view of the environmental sealing ring and the test device;

Fig. 4 is a schematic structural view of the flow channel sealing ring.

detailed description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

Example

As shown in Figure 1-4, a double-seal structure clamp flange provided by the utility model includes a pair of clamps 12, the two sides of the clamps 12 are connected by bolts 7 and nuts 8, and the nuts at both ends of the bolts 7 8 and hoop 12 are provided with a set of gaskets composed of outer spherical gasket 9 and inner spherical gasket 10 . Nut 8 adopts spherical nut. The upper and lower ends of the hoop 12 are provided with a sealing structure, and the sealing structure includes a pair of flange sockets arranged on the upper and lower ends of the hoop 12 to match the hoop, and a flange ferrule 2 arranged on the outside of the pipeline; An environmental sealing ring 3 and a flow channel sealing ring 4 are arranged between the socket one 1 and the flange socket two 5, and the flow channel sealing ring 4 matches the flow channel on the hoop 12; the flow channel of the hoop 12 The inner wall is provided with an anti-corrosion layer 6 . A pressure measuring device 11 is provided between the environment sealing ring 3 and the channel sealing ring 4 .

Claims (4)

1. a kind of double sealing structure hoop type flange, comprise a pair of hoop (12), hoop (12) both sides are connected by bolt (7), nut (8), it is characterized in that, described hoop ( The upper and lower ends of 12) are provided with a sealing structure, which includes a pair of flange sockets arranged on the upper and lower ends of the hoop (12) to match the hoop, and a flange ferrule (2) arranged on the outside of the pipe. ; An environmental sealing ring (3), a flow channel sealing ring (4), a flow channel sealing ring (4) and a hoop (12) are arranged between the flange socket one (1) and the flange socket two (5) The inner wall of the flow channel of the hoop (12) is provided with an anti-corrosion layer (6). 2. The double-seal structure clamp flange according to claim 1, characterized in that a pressure measuring device (11) is provided between the environmental sealing ring (3) and the flow channel sealing ring (4). 3. The clamp-type flange with double-seal structure according to claim 1, characterized in that, a set of outer spherical gaskets is arranged between the nuts (8) at both ends of the bolt (7) and the clamp (12). (9), the gasket group that inner spherical gasket (10) is formed. 4. The clamp flange with double seal structure according to claim 1 or 3, characterized in that the nut (8) is a spherical nut.