Reducing pipe fitting

Abstract

The invention discloses a different-diameter pipe fitting, which relates to the technical field of pipelines. The invention includes a small-diameter pipe at the left end and a large-diameter pipe at the right end. The diameter of the right end of the joint is the same as that of the large-diameter pipe, and the left end of the large-diameter pipe is welded with a joint 2 with the same diameter as the large-diameter pipe. The different-diameter joint and joint 2 are respectively provided with flanges A and flanges that can cooperate with each other. B. The surfaces of flange A and flange B are both provided with annular anti-corrosion grooves, and the annular anti-corrosion grooves of flange A and flange B form an anti-corrosion chamber. The anti-corrosion chamber is provided with a ring-shaped anti-corrosion lining. The outer wall of the large-diameter pipe The upper sleeve is provided with an insulating layer, and the outer wall of the small-diameter pipe is provided with a composite anti-corrosion layer. The invention has the advantages of simple structure, reliable connection of different-diameter pipes, and good anti-corrosion and heat preservation effects for both large-diameter pipes and small-diameter pipes.

Description

technical field

[0001] The invention relates to the technical field of pipelines, and more specifically relates to a pipe fitting with a different diameter. Background technique

[0002] The sewage treatment equipment is connected by pipes. There are three types of existing pipes: the first type is metal pipes, the second type is plastic composite metal pipes, and the third type is plastic pipes.

[0003] However, the corrosion problem of the existing metal water supply pipelines affects the service life of the pipelines, so the inner walls of the pipelines are generally coated with anti-corrosion coatings and other anti-corrosion treatments. During the welding process of the pipe connection, the pipe wall is heated to damage the anti-corrosion layer, which affects the anti-corrosion performance, and causes the joints of the pipe to be corroded and leak.

[0004] Existing anti-corrosion pipelines generally implement anti-corrosion by adding an anti-corrosion layer on the ou...

Examples

Embodiment 1

[0021] Such as Figures 1 to 2 As shown, this embodiment provides a pipe fitting with a different diameter, including a small-diameter pipe 1 at the left end and a large-diameter pipe 4 at the right end. 2. The diameter of the right end of the reducing joint 2 is the same as that of the large-diameter pipe 4, and the left end of the large-diameter pipe 4 is welded with a joint 2 3 having the same diameter as the large-diameter pipe 4, and the reducing joint 2 and the joint 3 are respectively provided with Flange A2-1 and flange B3-1 that cooperate with each other, the surfaces of flange A2-1 and flange B3-1 are provided with annular anti-corrosion grooves, and the annular anti-corrosion grooves of flange A2-1 and flange B3-1 The grooves form an anti-corrosion cavity, and the anti-corrosion cavity is provided with an annular anti-corrosion inner lining 5, 4 sets of large-diameter pipes are provided with an insulation layer 4-1, and the outer wall of the small-diameter pipe 1 is...

Embodiment 2

[0024] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0025] The thermal insulation layer 4-1 includes multiple layers of glass fiber layers and multiple layers of aluminum foil stacked in sequence, and two adjacent layers of aluminum foil layers are not in contact.

[0026] The inner walls of the small-diameter pipe 1 and the large-diameter pipe 4 are coated with an epoxy anti-corrosion layer, and the material of the annular anti-corrosion lining 5 is a polytetrafluoroethylene layer 6-2.

Embodiment 3

[0028] This embodiment is done as follows on the basis of any of the above embodiments

[0029] The composite anticorrosion layer 1-1 includes a primer layer 1-1, an aluminum silicate wool layer 1-2 and an anticorrosion layer 1-3 coated on the outer wall of the small-diameter pipe 1 in sequence, and the top of the aluminum silicate wool layer 1-2 is The thickness of the wrapped anti-corrosion layer 1-2 is smaller than the thickness of the anti-corrosion layer wrapped at the bottom of the aluminum silicate cotton layer 1-2.

[0030] The anti-corrosion layer 1-3 is a polyester anti-corrosion layer.

[0031] The flange A2-1 and the flange B3-1 are fixed by a plurality of evenly distributed bolt assemblies.

technical field

[0001] The invention relates to the technical field of pipelines, and more specifically relates to a pipe fitting with a different diameter. Background technique

[0002] The sewage treatment equipment is connected by pipes. There are three types of existing pipes: the first type is metal pipes, the second type is plastic composite metal pipes, and the third type is plastic pipes.

[0003] However, the corrosion problem of the existing metal water supply pipelines affects the service life of the pipelines, so the inner walls of the pipelines are generally coated with anti-corrosion coatings and other anti-corrosion treatments. During the welding process of the pipe connection, the pipe wall is heated to damage the anti-corrosion layer, which affects the anti-corrosion performance, and causes the joints of the pipe to be corroded and leak.

[0004] Existing anti-corrosion pipelines generally implement anti-corrosion by adding an anti-corrosion layer on the ou...

Examples

Embodiment 1

[0021] Such as Figures 1 to 2 As shown, this embodiment provides a pipe fitting with a different diameter, including a small-diameter pipe 1 at the left end and a large-diameter pipe 4 at the right end. 2. The diameter of the right end of the reducing joint 2 is the same as that of the large-diameter pipe 4, and the left end of the large-diameter pipe 4 is welded with a joint 2 3 having the same diameter as the large-diameter pipe 4, and the reducing joint 2 and the joint 3 are respectively provided with Flange A2-1 and flange B3-1 that cooperate with each other, the surfaces of flange A2-1 and flange B3-1 are provided with annular anti-corrosion grooves, and the annular anti-corrosion grooves of flange A2-1 and flange B3-1 The grooves form an anti-corrosion cavity, and the anti-corrosion cavity is provided with an annular anti-corrosion inner lining 5, 4 sets of large-diameter pipes are provided with an insulation layer 4-1, and the outer wall of the small-diameter pipe 1 is...

Embodiment 2

[0024] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0025] The thermal insulation layer 4-1 includes multiple layers of glass fiber layers and multiple layers of aluminum foil stacked in sequence, and two adjacent layers of aluminum foil layers are not in contact.

[0026] The inner walls of the small-diameter pipe 1 and the large-diameter pipe 4 are coated with an epoxy anti-corrosion layer, and the material of the annular anti-corrosion lining 5 is a polytetrafluoroethylene layer 6-2.

Embodiment 3

[0028] This embodiment is done as follows on the basis of any of the above embodiments

[0029] The composite anticorrosion layer 1-1 includes a primer layer 1-1, an aluminum silicate wool layer 1-2 and an anticorrosion layer 1-3 coated on the outer wall of the small-diameter pipe 1 in sequence, and the top of the aluminum silicate wool layer 1-2 is The thickness of the wrapped anti-corrosion layer 1-2 is smaller than the thickness of the anti-corrosion layer wrapped at the bottom of the aluminum silicate cotton layer 1-2.

[0030] The anti-corrosion layer 1-3 is a polyester anti-corrosion layer.

[0031] The flange A2-1 and the flange B3-1 are fixed by a plurality of evenly distributed bolt assemblies.

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