Flaring pipeline connecting structure

Abstract

The utility model provides a flaring pipeline connecting structure, which belongs to the technical field of pipeline connecting structures and comprises a lining pipe fitting and two flaring pipes, each flaring pipe is provided with a flaring part, the lining pipe fitting is arranged in the two flaring parts in a penetrating manner, and the flaring pipeline connecting structure further comprises an annular sealing rubber mat. The number of the annular sealing rubber mats is two, the annular sealing rubber mats are arranged outside the lining pipe fitting in a sleeving mode, and the two annular sealing rubber mats are located in the two flaring parts respectively and abut against the flaring parts where the two annular sealing rubber mats are located respectively. The flaring part is provided with a first concave part used for clamping the lining pipe fitting. According to the flaring pipeline connecting structure provided by the utility model, the annular sealing rubber mat is used for sealing between the flaring part and the lining pipe fitting, and the first concave part extrudes the lining pipe fitting, so that the sealing between the flaring part and the lining pipe fitting can also be realized; by means of the double-sealing effect, the problem that according to an existing flaring pipeline connecting structure, the sealing effect between the flaring part and the lining pipe fitting is difficult to guarantee through a single sealing mode can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connection structures, and more specifically relates to an expanded pipeline connection structure. Background Art

[0002] The end of the flared pipe has a flared portion protruding outward in the circumferential direction. The connection structure of the flared pipeline generally includes two flared pipes, a liner pipe fitting and two flared flanges. The liner pipe fitting is inserted into the two flared portions. The two flared flanges are respectively sleeved on the two flared pipes. The two flared flanges are connected by multiple sets of bolts and nuts. In the prior art, two sealing rubber rings are sleeved on the liner pipe fitting. The two sealing rubber rings are respectively located in the two flared portions to ensure the sealing between the flared portion and the liner pipe fitting. However, it is difficult to ensure the sealing effect between the flared portion and the liner pipe fitting by a single sealing method of the sealing ring. Utility Model Content

[0003] The utility model aims to provide a flared pipe connection structure, aiming to solve the problem that it is difficult to ensure the sealing effect between the flared part and the liner pipe by a single sealing method in the existing flared pipe connection structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a flared pipe connection structure, including an inner liner pipe and two flared pipes, wherein the flared pipe has a flared portion, and the inner liner pipe is inserted into the two flared portions, and also includes an annular sealing rubber pad. There are two annular sealing rubber pads, which are sleeved outside the inner liner pipe, and the two annular sealing rubber pads are respectively located in the two flared portions and respectively abut against the flared portions. The flared portion has a first recessed portion that is circumferentially recessed inward and used to clamp the inner liner pipe.

[0005] In a possible implementation manner, the number of the first recessed portions on each of the flared portions is at least two.

[0006] In a possible implementation, a middle portion of the lining pipe has a positioning portion that protrudes circumferentially outward, and the positioning portion is located between the two flared portions and abuts against the two flared portions.

[0007] In a possible implementation, the positioning portion has two second recessed portions that are recessed inwardly in the circumferential direction, and the flared pipe connection structure further includes a limiting sleeve. There are two limiting sleeves, the two limiting sleeves are respectively sleeved outside the two flared pipes and respectively accommodate the two flared portions, the limiting sleeve is sleeved outside the positioning portion, the limiting sleeve has a third recessed portion that is recessed inwardly in the circumferential direction, and the third recessed portions on the two limiting sleeves are respectively clamped in the two second recessed portions.

[0008] In a possible implementation, the limiting sleeve has a fourth recessed portion that is recessed inward in the circumferential direction, and the fourth recessed portion is clamped in the first recessed portion on the expanded portion on which it is sleeved.

[0009] In a possible implementation, the positioning portion has two fifth recessed portions that are circumferentially inwardly recessed, and the flared pipe connection structure further includes two positioning rings. The two positioning rings are respectively clamped in the two fifth recessed portions, and the two positioning rings are respectively connected to the two limiting sleeves.

[0010] In a possible implementation, the positioning ring has an annular cavity arranged outside the positioning portion, an annular groove portion is arranged in the annular cavity and is recessed away from the positioning portion, and the limiting sleeve is inserted into the corresponding annular cavity and has a clamping portion clamped in the corresponding annular groove portion.

[0011] In a possible implementation, the flared pipe is a PSP steel-plastic composite pressure pipe.

[0012] In a possible implementation manner, the positioning ring is made of plastic.

[0013] In a possible implementation, the lining pipe has two sixth recessed portions that are circumferentially recessed inward, and the two annular sealing rubber gaskets are respectively located in the two sixth recessed portions.

[0014] In the embodiment of the present application, the relative movement between the lining pipe and the flared part can be limited by clamping the lining pipe by the first recessed part, so that the lining pipe and the two flared pipes are connected together. The annular sealing rubber pad is used for sealing between the flared part and the lining pipe, and the first recessed part squeezes the lining pipe to achieve the sealing between the flared part and the lining pipe. The above-mentioned double sealing effect can avoid the problem that the existing flared pipe connection structure is difficult to ensure the sealing effect between the flared part and the lining pipe by a single sealing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic cross-sectional view of a flared pipe connection structure provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the local A in FIG.

[0018] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the local B in FIG.

[0019] Figure 4 A schematic cross-sectional view of a flared pipe connection structure provided in an embodiment of the utility model before being squeezed by a ring pressing tool.

[0020] In the figure: 1. lining pipe; 11. positioning part; 111. second recessed part; 112. fifth recessed part; 12. sixth recessed part; 2. flaring pipe; 21. flaring part; 211. first recessed part; 3. annular sealing gasket; 4. limiting sleeve; 41. third recessed part; 42. fourth recessed part; 43. clamping part; 5. positioning ring; 51. annular cavity; 511. annular groove part. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Please also read Figure 1 and Figure 2 , a flared pipe connection structure provided by the utility model is now described. The flared pipe connection structure includes a liner pipe 1 and two flared pipes 2, the flared pipe 2 has a flared portion 21, the liner pipe 1 is inserted into the two flared portions 21, and also includes an annular sealing rubber gasket 3. There are two annular sealing rubber gaskets 3, which are sleeved outside the liner pipe 1, and the two annular sealing rubber gaskets 3 are respectively located in the two flared portions 21 and respectively abut against the flared portions 21. Among them, the flared portion 21 has a first recessed portion 211 that is circumferentially recessed inwardly and used to clamp the liner pipe 1.

[0023] The utility model provides a flared pipe connection structure. Compared with the prior art, the relative movement of the liner pipe 1 and the flared part 21 can be limited by clamping the liner pipe 1 with the first recessed part 211, so that the liner pipe 1 and the two flared pipes 2 are connected together. The annular sealing rubber pad 3 is used for sealing between the flared part 21 and the liner pipe 1. The first recessed part 211 squeezes the liner pipe 1 and can also achieve sealing between the flared part 21 and the liner pipe 1. The above-mentioned double sealing effect can avoid the problem that the existing flared pipe 2-way connection structure is difficult to ensure the sealing effect between the flared part 21 and the liner pipe 1 through a single sealing method.

[0024] In some embodiments, the characteristic flared portion 21 may be formed as follows: Figure 2See the structure shown. Figure 2 The number of the first recessed portions 211 on each flared portion 21 is at least two, so that the sealing effect between the flared portion 21 and the liner pipe 1 can be further ensured.

[0025] Further, if the number of the first recessed portions 211 on each flared portion 21 is two, the two first recessed portions 211 are respectively located on two sides of the annular sealing rubber gasket 3 in the flared portion 21 .

[0026] In some embodiments, the above-mentioned characteristic lining pipe 1 can be used as follows Figure 1 See the structure shown. Figure 1 The middle part of the lining pipe 1 has a positioning portion 11 protruding outward in the circumferential direction, and the positioning portion 11 is located between the two flaring portions 21 and abuts against the two flaring portions 21. The positioning portion 11 limits the flaring portion 21 so that the length of the lining pipe 1 inserted into the flaring portion 21 can be a preset length.

[0027] In some embodiments, see Figure 1 and Figure 2 The positioning part 11 has two second recessed parts 111 that are recessed inwardly in the circumferential direction, and the flared pipe 2-way connection structure also includes a limiting sleeve 4. There are two limiting sleeves 4, and the two limiting sleeves 4 are respectively sleeved outside the two flared pipes 2 and respectively accommodate the two flared parts 21. The limiting sleeves 4 are sleeved outside the positioning part 11, and the limiting sleeves 4 have a third recessed part 41 that is recessed inwardly in the circumferential direction. The third recessed parts 41 on the two limiting sleeves 4 are respectively clamped in the two second recessed parts 111. The positioning part 11 and the limiting sleeve 4 are connected together by the cooperation of the third recessed part 41 and the second recessed part 111.

[0028] In this embodiment, see Figure 1 and Figure 4 , the limiting sleeve 4 can be firstly sleeved on the positioning portion 11 and the flared tube 2, and then the ring pressing tool in the prior art can be sleeved on the limiting sleeve 4, and finally the third recessed portion 41 and the second recessed portion 111 can be squeezed out.

[0029] In some embodiments, see Figure 1 and Figure 2 The limiting sleeve 4 has a fourth recessed portion 42 that is recessed inwardly in the circumferential direction, and the fourth recessed portion 42 is clamped in the first recessed portion 211 on the sleeved expanding portion 21. The limiting sleeve 4 can be connected to the expanding pipe 2 through the cooperation of the fourth recessed portion 42 and the first recessed portion 211.

[0030] The sealing between the limiting sleeve 4 and the lining pipe 1 can be achieved through the concave-convex cooperation between the third recessed portion 41 and the second recessed portion 111, and the sealing between the limiting sleeve 4 and the expanding portion 21 can be achieved through the concave-convex cooperation between the fourth recessed portion 42 and the first recessed portion 211. In this way, the reliability of the sealing between the expanding pipe 2 and the lining pipe 1 can be indirectly improved.

[0031] In this embodiment, see Figure 1 and Figure 4 , the ring pressing tool in the prior art can be set on the limiting sleeve 4, and then the fourth recessed portion 42 and the first recessed portion 211 are squeezed out. In this way, the deformation of the flared portion 21 can make the flared portion 21 press the annular sealing gasket 3.

[0032] Furthermore, the limiting sleeve 4 and the accommodated flared portion 21 may be provided with at least two groups of fourth recessed portions 42 and first recessed portions 211 .

[0033] In some embodiments, see Figure 1 and Figure 3 The positioning portion 11 has two fifth recessed portions 112 that are recessed inwardly in the circumferential direction, and the flared pipe 2-way connection structure further includes two positioning rings 5. The two positioning rings 5 ​​are respectively clamped in the two fifth recessed portions 112, and the two positioning rings 5 ​​are respectively connected to the two limiting sleeves 4. The relative position of the limiting sleeve 4 and the lining pipe 1 can be positioned by clamping the positioning ring 5 with the fifth recessed portion 112.

[0034] When the first recess 211 , the second recess 111 , the third recess 41 and the fourth recess 42 are processed by the ring pressing tool, the clamping connection between the positioning ring 5 and the fifth recess 112 can avoid relative displacement between the lining pipe 1 and the limiting sleeve 4 .

[0035] In some embodiments, see Figure 1 and Figure 3 The positioning ring 5 has an annular cavity 51 arranged outside the positioning portion 11, and an annular groove portion 511 is arranged in the annular cavity 51 and is recessed in a direction away from the positioning portion 11. The limiting sleeve 4 is inserted into the corresponding annular cavity 51 and has a clamping portion 43 clamped in the corresponding annular groove portion 511, so that the positioning ring 5 is connected to the limiting sleeve 4. The corresponding annular cavity 51 and the corresponding annular groove portion 511 in this embodiment refer to the annular cavity 51 and the annular groove portion 511 on the positioning ring 5 to be connected with the limiting sleeve 4.

[0036] In this embodiment, the clamping portion 43 may also be in a circular ring shape.

[0037] In some embodiments, the expanded pipe 2 is a PSP steel-plastic composite pressure pipe, which has the characteristics of high pressure bearing and strong impact resistance.

[0038] In some embodiments, the positioning ring 5 is made of plastic. In this way, the deformation ability of the plastic can be used to clamp the positioning ring 5 in the fifth recessed portion 112 and clamp the clamping portion 43 in the annular groove portion 511.

[0039] In some embodiments, the above-mentioned characteristic lining pipe 1 can be used as follows Figure 2 See the structure shown. Figure 2 The inner lining pipe 1 has two sixth recessed parts 12 which are recessed inwardly in the circumferential direction, and the two annular sealing rubber pads 3 are respectively located in the two sixth recessed parts 12. The position of the annular sealing rubber pads 3 on the inner lining pipe 1 can be positioned by the sixth recessed parts 12.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flared pipe connection structure, comprising a liner pipe and two flared pipes, wherein the flared pipe has a flared portion, and the liner pipe is inserted into the two flared portions, characterized in that: Also includes: There are two annular sealing rubber pads, which are sleeved outside the lining pipe, and the two annular sealing rubber pads are respectively located in the two flared parts and respectively abut against the flared parts; The flared portion has a first recessed portion which is recessed inwardly in the circumferential direction and is used for clamping the lining pipe.

2. A flared pipe connection structure according to claim 1, characterized in that: The number of the first recessed parts on each of the flared parts is at least two.

3. A flared pipe connection structure according to claim 1, characterized in that: The middle portion of the lining pipe has a positioning portion protruding outward in the circumferential direction, and the positioning portion is located between the two flaring portions and abuts against the two flaring portions.

4. A flared pipe connection structure as claimed in claim 3, characterized in that: The positioning portion has two second recessed portions that are recessed inwardly in the circumferential direction, and the flared pipe connection structure further includes: There are two limit sleeves, which are respectively sleeved on the outside of the two flared tubes and respectively accommodate the two flared parts. The limit sleeves are sleeved outside the positioning part. The limit sleeve has a third recessed part which is circumferentially recessed inwardly. The third recessed parts on the two limit sleeves are respectively clamped in the two second recessed parts.

5. A flared pipe connection structure as claimed in claim 4, characterized in that: The limiting sleeve has a fourth recessed portion which is recessed inwardly in the circumferential direction, and the fourth recessed portion is clamped in the first recessed portion on the expanded portion on which it is sleeved.

6. A flared pipe connection structure as claimed in claim 4, characterized in that: The positioning portion has two fifth recessed portions that are recessed inwardly in the circumferential direction, and the flared pipe connection structure further includes: The two positioning rings are respectively clamped in the two fifth recessed parts, and the two positioning rings are respectively connected to the two limiting sleeves.

7. A flared pipe connection structure according to claim 6, characterized in that: The positioning ring has an annular cavity arranged outside the positioning portion, and an annular groove portion is arranged in the annular cavity and is recessed away from the positioning portion. The limiting sleeve is inserted into the corresponding annular cavity and has a clamping portion clamped in the corresponding annular groove portion.

8. The flared pipe connection structure according to claim 1, characterized in that: The expanded pipe is a PSP steel-plastic composite pressure pipe.

9. The flared pipe connection structure according to claim 6, characterized in that: The positioning ring is made of plastic.

10. The flared pipe connection structure according to claim 1, characterized in that: The lining pipe has two sixth recessed parts which are recessed inward in the circumferential direction, and the two annular sealing rubber pads are respectively located in the two sixth recessed parts.

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