Pipeline connecting structure

Abstract

The utility model discloses a pipeline connecting structure which comprises a pipeline and a connector assembly, a groove and a threaded connecting area are arranged on the peripheral face of the connector end of the pipeline, the groove is separated from a connector of the pipeline, the threaded connecting area is located on the side, away from the connector, of the groove, and the connector assembly comprises a first flange, a limiting gasket and a second flange. The first flange is in threaded connection with the threaded connection area, the second flange is in threaded connection with the connector end and is separated from the first flange in the axial direction of the pipeline, the limiting gasket comprises a limiting part and a clamping part, the limiting part is arranged in the groove in a matched mode, the clamping part is arranged between the first flange and the second flange in a clamped mode, and the first flange and the second flange are connected through a bolt. According to the pipeline connecting structure, the limiting gasket is arranged between the two flange pieces, the flange pieces on the inner side are blocked through the limiting gasket, the flange pieces are prevented from being disengaged outwards, the good anti-disengagement and anti-leakage effects are achieved, and connection at a pipeline connector is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and specifically, to a pipeline connection structure. Background Art

[0002] Non-metallic pipelines are easy to lay and have strong weather resistance, and are gradually being applied in various fields, especially widely used in fields such as water conveyance and gas conveyance. However, the joints of non-metallic pipelines have always been a weak point. Because it involves the connection of metal and non-metal, the expansion rates and pressing degrees of different materials are different, resulting in failure forms such as easy detachment and leakage at the pipeline joints over time. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to propose a pipeline connection structure aiming at the defects and deficiencies of the prior art, and this pipeline connection structure has good anti-detachment and anti-leakage effects.

[0004] The pipeline connection structure of the embodiment of the utility model includes: a pipeline, an outer peripheral surface of an interface end of the pipeline is provided with a groove and a threaded connection area, and in the axial direction of the pipeline, the groove is spaced apart from the interface of the pipeline, and the threaded connection area is located on a side of the groove away from the interface; an interface assembly, the interface assembly includes a first flange, a limiting gasket and a second flange, the first flange is threadedly connected to the threaded connection area, the second flange is threadedly connected to the interface end and is spaced apart from the first flange in the axial direction of the pipeline, the limiting gasket includes a limiting portion and a clamping portion, the limiting portion is fitted in the groove, the clamping portion is clamped between the first flange and the second flange, the first flange and the second flange are connected by bolts and the second flange is further provided with assembly holes for connecting to the second flanges on other pipelines.

[0005] The pipeline connection structure according to the embodiment of the present utility model, wherein the outer peripheral surface of the interface end of the pipeline is provided with a groove and a threaded connection area, and in the axial direction of the pipeline, the groove is spaced apart from the interface of the pipeline, the threaded connection area is located on the side of the groove away from the interface, the interface assembly includes a first flange, a limit gasket and a second flange, the first flange is threadedly connected to the threaded connection area, the second flange is threadedly connected to the interface end and is spaced apart from the first flange in the axial direction of the pipeline, the limit gasket includes a limit portion and a clamping portion, the limit portion is fitted in the groove, the clamping portion is clamped between the first flange and the second flange, the first flange and the second flange are connected by bolts and the second flange is further provided with an assembly hole for connecting to the second flange on other pipelines. Thus, by clamping a limit gasket between the first flange and the second flange, and the limit portion of the limit gasket is fitted in the groove on the pipeline, the limit gasket can be used to prevent the first flange from sliding outwards, thereby realizing the anti-disconnection function and avoiding failure forms such as leakage and disconnection at the pipeline interface.

[0006] In some embodiments, the side surface of the first flange facing the limit gasket abuts against the limit portion.

[0007] In some embodiments, the thread directions of the first flange and the second flange are opposite.

[0008] In some embodiments, the inner peripheral surface of the interface end of the pipeline has an internal thread, the second flange includes an inner cylinder body fitted in the pipeline and a flange portion connected to the inner cylinder body and located outside the pipeline, the outer peripheral surface of the inner cylinder body has an external thread matching the internal thread, and the flange portion is connected to the first flange.

[0009] In some embodiments, the inner peripheral surface of the interface end of the pipeline has an annular groove, the bottom wall of the annular groove is provided with the internal thread and the bottom wall of the annular groove is connected to the end surface of the interface end of the pipeline, and the inner cylinder body is fitted in the annular groove.

[0010] In some embodiments, the flange portion includes an outer cylinder body and a flange plate, the outer cylinder body is connected to the inner cylinder body and extends along the axial direction of the pipeline, the flange plate is annularly arranged on the outer peripheral surface of the outer cylinder body, the outer diameter of the outer cylinder body is larger than the outer diameter of the inner cylinder body, and the end surface of the outer cylinder body facing the inner cylinder body abuts against the end surface of the interface end of the pipeline.

[0011] In some embodiments, the flange plate includes a left flange plate and a right flange plate, the left flange plate and the first flange clamp the limit gasket, the right flange plate is spaced apart from the side of the left flange plate away from the limit gasket, and the assembly hole is provided on the right flange plate.

[0012] In some embodiments, a seal is provided between the inner cylinder and the pipe, and between the first flange and the pipe; and / or, a sealing gasket is provided between the inner cylinder and the end wall of the annular groove.

[0013] In some embodiments, the groove is an annular shape extending along the circumferential direction of the pipe. The limiting gasket includes a first half-ring piece and a second half-ring piece, and the first half-ring piece and the second half-ring piece are butted to surround the entire circumference of the pipe.

[0014] In some embodiments, the first flange includes a connecting portion, a flange ring, and a bending plate. The connecting portion is threadedly connected to the pipe. The flange ring is located on the side of the connecting portion facing the second flange and is connected to the first flange. The bending plate is connected between the connecting portion and the flange ring, and the bending plate includes a first plate body and a second plate body connected at an angle. The length of the threaded connection area in the axial direction of the pipe is greater than the length of the connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the pipe connection structure according to an embodiment of the present invention.

[0016] Reference Numerals:

[0017] First flange 1, connecting portion 11, bending plate 12, flange ring 13, limiting gasket 2, limiting portion 21, clamping portion 22, inclined plate 23, second flange 3, left flange piece 31, right flange piece 32, inner cylinder 33, outer cylinder 34, pipe 4, seal 5, sealing gasket 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0019] As Figure 1 shown, the pipe connection structure according to an embodiment of the present invention includes a pipe 4 and an interface assembly.

[0020] Specifically, as Figure 1As shown in the figure, the outer peripheral surface of the interface end of the pipe 4 is provided with a groove and a threaded connection area. In the axial direction of the pipe 4, the groove is spaced apart from the interface of the pipe 4, and the threaded connection area is located on the side of the groove away from the interface. The interface assembly includes a first flange 1, a limit gasket 2, and a second flange 3. The first flange 1 is threadedly connected to the threaded connection area, the second flange 3 is threadedly connected to the interface end and is spaced apart from the first flange 1 in the axial direction of the pipe 4. The limit gasket 2 includes a limit portion 21 and a clamping portion 22. The limit portion 21 is fitted in the groove, and the clamping portion 22 is clamped between the first flange 1 and the second flange 3. The first flange 1 and the second flange 3 are connected by bolts, and the second flange 3 is further provided with an assembly hole for connecting to the second flange 3 on other pipes 4.

[0021] It can be understood that after the interface assembly is assembled with the pipe 4, the first flange 1 and the second flange 3 are connected, the limit gasket 2 is clamped in the middle of the two, and both the first flange 1 and the second flange 3 are threadedly connected to the pipe 4. The limit portion 21 of the limit gasket 2 extends into the groove. When the first flange 1 has a tendency to slide outwards, the limit gasket 2 can play a blocking role, thus preventing the first flange 1 from falling off outwards. Especially when applied to non-metallic pipes 4, it can well solve the problem of interface detachment caused by different expansion rates and pressing degrees of different materials (metal and non-metal).

[0022] In the pipe connection structure of the embodiment of the present utility model, the outer peripheral surface of the interface end of the pipe 4 is provided with a groove and a threaded connection area. In the axial direction of the pipe 4, the groove is spaced apart from the interface of the pipe 4, and the threaded connection area is located on the side of the groove away from the interface. The interface assembly includes a first flange 1, a limit gasket 2, and a second flange 3. The first flange 1 is threadedly connected to the threaded connection area, the second flange 3 is threadedly connected to the interface end and is spaced apart from the first flange 1 in the axial direction of the pipe 4. The limit gasket 2 includes a limit portion 21 and a clamping portion 22. The limit portion 21 is fitted in the groove, and the clamping portion 22 is clamped between the first flange 1 and the second flange 3. The first flange 1 and the second flange 3 are connected by bolts, and the second flange 3 is further provided with an assembly hole for connecting to the second flange 3 on other pipes 4. Thus, by clamping the limit gasket 2 between the first flange 1 and the second flange 3, and the limit portion 21 of the limit gasket 2 is fitted in the groove on the pipe 4, the limit gasket 2 can be used to prevent the first flange 1 from sliding outwards, thereby realizing the anti-detachment function and avoiding failure forms such as leakage and detachment at the interface of the pipe 4.

[0023] Furthermore, the side surface of the first flange 1 facing the limit gasket 2 abuts against the limit portion 21. Thus, as long as the first flange 1 has a tendency to shake and fall off outwards a little, the limit gasket 2 can block the first flange 1 to ensure the sealing effect of the connection.

[0024] Furthermore, the threads of the first flange 1 and the second flange 3 are in opposite directions. It is understood that after assembly, the first flange 1 and the second flange 3 are connected as a whole by bolts, and the opposite directions of the threads can avoid circumferential sliding and ensure the sealing of the interface.

[0025] In some embodiments, Figure 1 As shown, the inner circumference of the interface end of the pipe 4 has an internal thread, the second flange 3 includes an inner cylinder 33 fitted in the pipe 4 and a flange portion connected to the inner cylinder 33 and located outside the pipe 4, the outer circumference of the inner cylinder 33 has an external thread fitted with the internal thread, and the flange portion is connected to the first flange 1. In other words, the first flange 1 and the second flange 3 are connected to the pipe 4 from the inside and outside, respectively. Compared with the single-side connection, the threaded area is arranged on both sides, which can reduce the length of the threaded area and avoid the interface structure occupying too long an axial space on the pipe 4.

[0026] Alternatively, if Figure 1 As shown, the inner circumference of the interface end of the pipe 4 has an annular groove, the bottom wall of the annular groove is provided with an internal thread and the bottom wall of the annular groove is connected to the end face of the interface end of the pipe 4, and the inner cylinder 33 is fitted in the annular groove. Therefore, by providing an annular groove on the inner circumference of the interface of the pipe 4 and fitting the connecting portion 11 of the second flange 3 and the pipe 4 in the annular groove, the connection structure of the two does not occupy the axial space inside the pipe 4, avoiding damage to the original flow surface of the pipe 4, and the end wall of the annular groove and the end of the inner cylinder 33 can stop to play the role of assembly limit.

[0027] Furthermore, the flange portion includes an outer cylinder 34 and a flange sheet, the outer cylinder 34 is connected to the inner cylinder 33 and extends along the axial direction of the pipe 4, the flange sheet is arranged on the outer peripheral surface of the outer cylinder 34, the outer diameter of the outer cylinder 34 is larger than the outer diameter of the inner cylinder 33, and the end surface of the outer cylinder 34 facing the inner cylinder 33 is stopped against the end surface of the interface end of the pipe 4. Therefore, the connection between the inner cylinder 33 and the outer cylinder 34 can form a step structure, and the step structure can just clamp the end surface of the main interface end, thereby realizing assembly positioning.

[0028] In some embodiments, the flange includes a left flange 31 and a right flange 32. The left flange 31 and the first flange 1 clamp the limiting gasket 2. The right flange 32 is arranged at a distance on the side of the left flange 31 away from the limiting gasket 2, and the assembly hole is arranged on the right flange 32. In other words, two flanges are constructed on the second flange 3, one for connecting the first flange 1, and the other for connecting the flange on the other pipeline 4. The two sets of connections do not interfere with each other, and the assembly is stable and the disassembly is convenient.

[0029] Preferably, a seal 5 is provided between the inner cylinder 33 and the pipeline 4 and between the first flange 1 and the pipeline 4 .

[0030] Preferably, six sealing gaskets are provided between the inner cylinder 33 and the end wall of the annular groove. Thus, the sealing member 5 and the six sealing gaskets can improve the sealing performance of each connection contact surface and avoid leakage at the interface.

[0031] Preferably, the sealing member 5 is an annular sealing ring.

[0032] Furthermore, as Figure 1 shown, the groove is an annular shape extending along the circumferential direction of the pipeline 4. The limiting gasket 2 includes a first semi-ring piece and a second semi-ring piece, and the first semi-ring piece and the second semi-ring piece are butted to surround the entire circumference of the pipeline 4. In other words, the limiting gasket 2 is divided into two independent semi-annular shapes. During assembly, it can be snapped into the groove along the opening to achieve the assembly of the limiting gasket 2.

[0033] In some embodiments, the first flange 1 includes a connecting portion 11, a flange ring 13, and a bending plate 12. The connecting portion 11 is threadedly connected to the pipeline 4. The flange ring 13 is located on the side of the connecting portion 11 facing the second flange 3 and is connected to the first flange 1. The bending plate 12 is connected between the connecting portion 11 and the flange ring 13, and the bending plate 12 includes a first plate body and a second plate body connected at an angle. The length of the threaded connection area in the axial direction of the pipeline 4 is greater than the length of the connecting portion 11. Thus, by setting the threaded connection area longer than the connecting portion 11, it is convenient for the assembly of the first flange 1. The bending plate 12 is configured as two plates at an angle, which can enhance the structural strength of the first flange 1.

[0034] Furthermore, the limiting gasket 2 further includes an inclined plate 23. The inclined plate 23 extends obliquely outward in the direction towards the second flange 3. Its inner end is connected to the limiting portion 21, and its outer end is connected to the clamping portion 22. The clamping portion 22 stands between the flange ring 13 of the first flange 1 and the left flange piece 31 of the second flange 3.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0040] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pipeline connection structure, characterized in that: include: A pipeline, wherein the outer peripheral surface of the interface end of the pipeline is provided with a groove and a threaded connection area, and in the axial direction of the pipeline, the groove is spaced apart from the interface of the pipeline, and the threaded connection area is located on a side of the groove away from the interface; An interface component, the interface component includes a first flange, a limiting gasket and a second flange, the first flange is threadedly connected to the threaded connection area, the second flange is threadedly connected to the interface end and is spaced apart from the first flange in the axial direction of the pipeline, the limiting gasket includes a limiting portion and a clamping portion, the limiting portion is engaged in the groove, the clamping portion is clamped between the first flange and the second flange, the first flange and the second flange are connected by bolts and the second flange is also provided with an assembly hole connected to the second flange on other pipelines.

2. The pipeline connection structure according to claim 1, characterized in that: The side surface of the first flange facing the limiting gasket abuts against the limiting portion.

3. The pipeline connection structure according to claim 1, characterized in that: The first flange and the second flange have opposite thread directions.

4. The pipeline connection structure according to claim 1, characterized in that: The inner circumference of the interface end of the pipe has an internal thread, the second flange includes an inner cylinder body that fits in the pipe and a flange portion that is connected to the inner cylinder body and is located outside the pipe, the outer circumference of the inner cylinder body has an external thread that fits with the internal thread, and the flange portion is connected to the first flange.

5. The pipeline connection structure according to claim 4, characterized in that: The inner circumference of the interface end of the pipe has an annular groove, the bottom wall of the annular groove is provided with the internal thread and the bottom wall of the annular groove is connected to the end surface of the interface end of the pipe, and the inner cylinder is fitted in the annular groove.

6. The pipeline connection structure according to claim 5, characterized in that: The flange portion includes an outer cylinder and a flange sheet. The outer cylinder is connected to the inner cylinder and extends along the axial direction of the pipeline. The flange sheet is arranged on the outer circumferential surface of the outer cylinder. The outer diameter of the outer cylinder is larger than the outer diameter of the inner cylinder. The end surface of the outer cylinder facing the inner cylinder stops at the end surface of the interface end of the pipeline.

7. The pipeline connection structure according to claim 6, characterized in that: The flange includes a left flange and a right flange. The left flange and the first flange clamp the limiting gasket. The right flange is spaced apart on a side of the left flange away from the limiting gasket. The assembly hole is provided on the right flange.

8. The pipeline connection structure according to claim 5, characterized in that: A sealing member is provided between the inner cylinder and the pipeline and between the first flange and the pipeline; and / or a sealing gasket is provided between the inner cylinder and the end wall of the annular groove.

9. The pipeline connection structure according to claim 1, characterized in that: The groove is annular and extends along the circumference of the pipeline. The limiting gasket includes a first half ring piece and a second half ring piece. The first half ring piece and the second half ring piece are butt-jointed to surround the entire circumference of the pipeline.

10. The pipeline connection structure according to any one of claims 1 to 9, characterized in that: The first flange includes a connecting portion, a flange ring and a bent plate, the connecting portion is threadedly connected to the pipeline, the flange ring is located on the side of the connecting portion facing the second flange and is connected to the first flange, the bent plate is connected between the connecting portion and the flange ring and the bent plate includes a first plate body and a second plate body connected at an angle, and the length of the threaded connection area in the axial direction of the pipeline is greater than the length of the connecting portion.

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