Insulating joint for connecting pipelines with different diameters

Abstract

The utility model discloses an insulating joint for connecting different-diameter pipelines. The insulating joint comprises a small pipe, a large pipe, a different-diameter flange, an equal-diameter flange, an insulating ring, a sleeve, an insulating rubber layer, a thermoplastic pipe and an insulating coating layer. A different-diameter flange and an equal-diameter flange are arranged to be connected with the small pipe and the large pipe correspondingly, and then the same-caliber flange faces are connected; the insulating ring is arranged to block the flange face to achieve insulation, the insulating rubber layers are arranged to block the different-diameter flange, the equal-diameter flange and the sleeve respectively, and the thermoplastic pipe and the insulating coating layer are arranged to enhance the insulating function. According to the utility model, different-diameter pipelines are connected, and the function of an insulating joint is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connectors, in particular to an insulating joint for connecting pipelines of different diameters. Background Art

[0002] Insulating joints are a general term for pipe joints that have the sealing performance, strength performance and insulation performance required for electrical corrosion protection required for buried steel pipelines. They are widely used in the gas, petroleum, chemical and other industries, especially in long-distance transmission pipelines, urban gas pipeline networks, pressure regulating station connections, etc., to ensure the safe and stable operation of the pipeline system; and have been rapidly developed with the advancement of science and technology.

[0003] For example, a Chinese invention with the publication number CN118499597B and the publication date of September 17, 2024 discloses an insulating joint with adjustable specifications, including an insulating joint body and a fixing ring. The insulating joint body is fixedly connected to the fixing ring on both sides, and the fixing ring is slidably connected to the fixing blocks equidistantly distributed in the circumference on both sides. The fixing block close to the insulating joint body is narrower than the other side and is used to fix a thicker pipe. The fixing ring is rotatably connected to both sides of the fixing ring. The pipe is connected to the fixing ring, and the corresponding rotating ring is controlled to rotate according to the size of the pipe. The fixing block is squeezed inward by the first squeezing block and slidably sleeved on the pipe, thereby fixing the pipe so that the pipe is connected to the insulating joint body through the fixing ring. At the same time, under the action of the rubber strip, it can ensure that the fixing block is tightly fitted with the pipe surface to prevent leakage of the transported material. By setting two groups of fixing blocks, pipes of different specifications can be connected through the insulating joint body.

[0004] It can be seen from the above patent that although the specifications of the insulating joint are adjustable, the size change of the fixing ring is limited for the connection of two pipes with large differences in specifications. Therefore, it is necessary to design an insulating joint suitable for connecting pipes of different diameters for improvement. Summary of the Invention

[0005] The purpose of the utility model is to solve the deficiencies of the prior art and to provide an insulating joint for connecting pipes of different diameters.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] An insulating joint for connecting pipes of different diameters comprises a small tube, a large tube, a reducing flange, an equal-diameter flange, an insulating ring and a sleeve. The small tube is embedded in the small-diameter joint end of the reducing flange, the joints of the large tube and the equal-diameter flange are welded together, the flange surfaces of the reducing flange and the equal-diameter flange are embedded in the sleeve, and an insulating ring is arranged between the flange surfaces of the reducing flange and the equal-diameter flange.

[0008] Preferably, an insulating rubber layer is provided between the outer walls of the different-diameter flange and the equal-diameter flange and the inner wall of the sleeve.

[0009] Preferably, the insulating joint is covered with a thermoplastic tube on the outer walls of the exposed small tube, the reducing flange, the sleeve and the large tube in sequence from left to right.

[0010] Preferably, an insulating coating layer is sprayed on the outer surface of the thermoplastic pipe.

[0011] Preferably, a male thread is provided on the outer wall of the small tube, and a female thread is provided on the inner wall of the small-diameter joint end of the reducing flange, and the male thread on the small tube is threadedly connected with the female thread of the reducing flange.

[0012] Preferably, the sleeve consists of an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are fixedly connected by bolts and nuts on the outer wall of the sleeve respectively.

[0013] Preferably, the inner diameter and outer diameter of the flange surface of the different-diameter flange and the flange surface of the equal-diameter flange are equal.

[0014] The beneficial effects of the utility model are:

[0015] Set up reducing flanges and equal-diameter flanges to connect small pipes and large pipes respectively, and then connect the flange surfaces of the same diameter; set up insulating rings to block the flange surfaces to achieve insulation, set up insulating rubber layers to block reducing flanges, equal-diameter flanges and sleeves respectively, set up thermoplastic pipes and insulating paint layers to enhance the insulation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0018] Figure 1 This is a structural schematic diagram of an insulating joint for connecting pipes of different diameters proposed by the utility model;

[0019] Figure 1 Shown in the figure: 1. Small tube, 2. Large tube, 3. Reducing flange, 4. Equal diameter flange, 5. Insulating ring, 6. Sleeve, 7. Insulating rubber layer, 8. Thermoplastic tube, 9. Insulating coating layer. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] It should be noted that similar reference numerals and letters tend to denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present utility model. In addition, the terms "first," "second," etc., etc., are used only to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0025] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Reference Figure 1 The utility model discloses an insulating joint for connecting pipes of different diameters, comprising a small pipe 1, a large pipe 2, a reducing flange 3, an equal-diameter flange 4, an insulating ring 5, a sleeve 6, an insulating rubber layer 7, a thermoplastic pipe 8 and an insulating coating layer 9.

[0027] A convex thread is provided on the outer wall of the small tube 1, and a concave thread is provided on the inner wall of the small-diameter joint end of the reducing flange 3. The convex thread on the small tube 1 is embedded in the concave thread of the reducing flange 3 for threaded connection, so that the small tube 1 is embedded in the small-diameter joint end of the reducing flange 3 and is fixed, thereby realizing the connection and fixation of the small tube 1 and the reducing flange 3; the joint of the large tube 2 and the equal-diameter flange 4 is welded to realize the connection and fixation of the large tube 2 and the equal-diameter flange 4; the inner diameter and outer diameter of the flange surface of the reducing flange 3 and the flange surface of the equal-diameter flange 4 are equal The flange surface of the reducing flange 3 and the flange surface of the equal-diameter flange 4 are embedded in the sleeve 6, and are connected and fixed by the sleeve 6 to realize the connection and fixation of the reducing flange 3 and the equal-diameter flange 4; an insulating ring 5 is provided between the flange surface of the reducing flange 3 and the flange surface of the equal-diameter flange 4 to block the flange surfaces of the reducing flange 3 and the equal-diameter flange 4 to realize insulation; an insulating rubber layer 7 is provided between the outer walls of the reducing flange 3 and the equal-diameter flange 4 and the inner wall of the sleeve 6 to block the reducing flange 3 and the equal-diameter flange 4 from the insulating rubber layer 7.

[0028] In an optional embodiment, a thermoplastic tube 8 is covered on the outer walls of the exposed small tube 1, the reducing flange 3, the sleeve 6, and the large tube 2 from left to right, on the one hand to fix the structure of the insulating joint, and on the other hand to enable the insulating joint as a whole to achieve the insulation function.

[0029] In an optional embodiment, an insulating coating layer 9 is sprayed on the outer surface of the thermoplastic tube 8 to enhance the insulating function of the insulating joint.

[0030] In an optional embodiment, the sleeve 6 is composed of an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are respectively fixedly connected by bolts and nuts on the outer wall of the sleeve 6 to connect and fix the embedded different-diameter flange 3 and the equal-diameter flange 4.

[0031] Of course, the embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. An insulating joint for connecting pipes of different diameters, comprising a small pipe (1), a large pipe (2), a different-diameter flange (3), a constant-diameter flange (4), an insulating ring (5) and a sleeve (6), characterized in that: The small tube (1) is embedded in the small-diameter joint end of the reducing flange (3), the joint of the large tube (2) and the equal-diameter flange (4) is welded, the flange surface of the reducing flange (3) and the flange surface of the equal-diameter flange (4) are embedded in the sleeve (6), and an insulating ring (5) is provided between the flange surface of the reducing flange (3) and the flange surface of the equal-diameter flange (4).

2. The insulating joint for connecting pipes of different diameters according to claim 1, characterized in that: An insulating rubber layer (7) is provided between the outer walls of the different-diameter flange (3) and the equal-diameter flange (4) and the inner wall of the sleeve (6).

3. The insulating joint for connecting pipes of different diameters according to claim 2, characterized in that: The insulating joint is covered with a thermoplastic tube (8) on the outer walls of the exposed small tube (1), the reducing flange (3), the sleeve (6), and the large tube (2) in sequence from left to right.

4. The insulating joint for connecting pipes of different diameters according to claim 3, characterized in that: An insulating coating layer (9) is sprayed on the outer surface of the thermoplastic tube (8).

5. The insulating joint for connecting pipes of different diameters according to claim 1, characterized in that: A male thread is provided on the outer wall of the small tube (1), and a female thread is provided on the inner wall of the small-diameter joint end of the reducing flange (3). The male thread on the small tube (1) is threadedly connected with the female thread of the reducing flange (3).

6. The insulating joint for connecting pipes of different diameters according to claim 1, characterized in that: The sleeve (6) consists of an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are fixedly connected by bolts and nuts on the outer wall of the sleeve (6).

7. The insulating joint for connecting pipes of different diameters according to claim 1, characterized in that: The inner diameter and outer diameter of the flange surface of the different-diameter flange (3) and the flange surface of the equal-diameter flange (4) are equal.

Images