Socket connection structure for steel pipe joints

Abstract

The utility model discloses a steel pipe connector socket connection structure, and relates to the technical field of steel pipe connector connection. The steel pipe connector socket connection structure comprises a first steel pipe and a second steel pipe, a bearing part is arranged on the inner surface of one end of the first steel pipe, a bearing groove is formed between the inner surface of the first steel pipe and the bearing part, an inserting part inserted into the bearing groove is arranged at one end of the second steel pipe, and a sealing piece is arranged between the bearing groove and the inserting part. And the bearing part is connected with the inserting part through a fastener. Through the cooperation of the bearing groove and the inserting part and the arrangement of the sealing piece and the fastening piece, during installation, the sealing piece is firstly placed in the bearing groove, then the inserting part is inserted into the bearing groove, connection can be completed through the fastening piece, and the construction time is shortened. Compared with a welding connector and a flange connector, the socket connection does not need complex welding equipment or flange plate presetting, the problem of limitation of an existing welding connector and an existing flange connector in pipe jacking construction is effectively solved, and wide application prospects are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe interface connection, in particular to a steel pipe interface socket connection structure. BACKGROUND

[0002] With the acceleration of urbanization process, the quality, environmental protection and safety requirements of urban renewal projects are continuously improved. Especially in the limited urban space, the updating demand of the original urban pipe network is increasing. As a kind of trenchless construction technology, pipe jacking technology has unique advantages in crossing complex environmental conditions, such as short construction period, convenient operation and high safety, and is widely used in the laying of urban underground pipelines.

[0003] At present, the connection methods of steel pipe joints in metal pipes used in pipe jacking projects mainly include welded interfaces and flange interfaces. However, the welded interfaces and flange interfaces have the following limitations in pipe jacking construction:

[0004] The construction quality of welded interfaces is affected by many factors and is difficult to control accurately, which is prone to defects such as welding undercut, porosity, slag inclusion, incomplete fusion, burn-through and welding cracks. In addition, in long-distance pipe jacking construction, if maintenance is required, the internal space of the pipeline is narrow and the ventilation capacity is insufficient, and the smoke generated by welding can pose a serious threat to the health and safety of construction personnel. The flange interface needs to be pre-set with a flange on the outside of the steel pipe, which will increase the side wall friction resistance of the pipeline, limiting its application in pipe jacking projects. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to provide a steel pipe interface socket connection structure to solve the problem of the limitations of welded interfaces and flange interfaces in pipe jacking construction.

[0006] The technical solution adopted by the present application to solve its technical problem is:

[0007] A steel pipe interface socket connection structure, comprising a first steel pipe and a second steel pipe, an inner surface of one end of the first steel pipe is provided with a receiving part, an inner surface of the first steel pipe and the receiving part form a receiving groove therebetween, one end of the second steel pipe is provided with a plug-in part plugged into the receiving groove, a sealing element is arranged between the receiving groove and the plug-in part, and the receiving part and the plug-in part are connected by a fastener.

[0008] Further, in the direction from the first steel pipe to the second steel pipe, the receiving part includes a fixed segment and a receiving segment connected in sequence, the fixed segment is connected with the inner surface of the first steel pipe, and the receiving segment is spaced apart from the inner surface of the first steel pipe to form the receiving groove therebetween.

[0009] Further, in the direction from the first steel pipe to the second steel pipe, the inner diameter of the fixed segment gradually decreases.

[0010] Further, the outer diameter of the spigot is smaller than the outer diameter of the second steel pipe.

[0011] Further, in the direction from the second steel pipe to the first steel pipe, the spigot comprises a connecting section and a spigot section connected in sequence, one end of the connecting section is connected with one end of the second steel pipe, and the spigot section is used for spigoting in the receiving groove.

[0012] Further, in the direction from the second steel pipe to the first steel pipe, the inner diameter of the connecting section gradually decreases.

[0013] Further, the sealing member comprises a first water-swelling sealing strip arranged between the outer surface of the spigot and the side wall of the receiving groove.

[0014] Further, the sealing member further comprises a second water-swelling sealing strip arranged between the inner surface of the spigot and the side wall of the receiving groove.

[0015] Further, the bottom of the receiving groove is provided with a first positioning part, and the end of the spigot is provided with a second positioning part for positioning cooperation with the first positioning part.

[0016] Further, the fastener comprises a bolt, and the bolt is screwed with the spigot after passing through the receiving part.

[0017] The beneficial effects of the present application are as follows:

[0018] The steel pipe interface socket and spigot connection structure provided by the embodiments of the present application, through the cooperation of the receiving groove and the spigot and the arrangement of the sealing member and the fastener, when installing, the sealing member is first placed in the receiving groove, then the spigot is inserted into the receiving groove, and the connection through the fastener can be completed, which shortens the construction time. Compared with the welded interface and the flange interface, the socket and spigot connection does not need complex welding equipment or flange pre-setting, effectively solves the problem of the limitations of the existing welded interface and flange interface in pipe jacking construction, and has a broad application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0020] Figure 1 is a schematic diagram of the steel pipe interface socket and spigot connection structure provided by the embodiments of the present application;

[0021] Figure 2 is a structural schematic view of the connection of the first steel pipe and the receiving part;

[0022] Figure 3 is a structural schematic view of the connection of the second steel pipe and the inserting part.

[0023] Reference signs:

[0024] 1 - first steel pipe;

[0025] 2 - second steel pipe;

[0026] 3 - receiving part;

[0027] 31 - fixed section;

[0028] 32 - receiving section;

[0029] 321 - through hole;

[0030] 4 - receiving groove;

[0031] 41 - first positioning part;

[0032] 5 - inserting part;

[0033] 51 - connecting section;

[0034] 52 - inserting section;

[0035] 521 - second positioning part; 522 - internal thread hole;

[0036] 6 - sealing member;

[0037] 61 - first water-swelling sealing strip;

[0038] 62 - second water-swelling sealing strip;

[0039] 7 - fastener;

[0040] 71 - bolt. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise specified, the above orientation description can be flexibly arranged in the actual application process under the condition of meeting the relative positional relationship shown in the drawings.

[0043] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Referring to Figure 1 , Figure 2 , Figure 3 The embodiment of the present application provides a steel pipe interface socket connection structure, which comprises a first steel pipe 1 and a second steel pipe 2. An inner surface of one end of the first steel pipe 1 is provided with a receiving part 3. A receiving groove 4 is formed between the inner surface of the first steel pipe 1 and the receiving part 3. One end of the second steel pipe 2 is provided with a plug-in part 5 which is plugged into the receiving groove 4. A sealing element 6 is arranged between the receiving groove 4 and the plug-in part 5. The receiving part 3 and the plug-in part 5 are connected by a fastener 7.

[0045] Referring to Figure 1 , Figure 2 , Figure 3 The inner diameter and the outer diameter of the first steel pipe 1 and the second steel pipe 2 are consistent, and the lengths of the two can be equal or not equal.

[0046] The inner surface of the right end of the first steel pipe 1 is fixed with the receiving part 3. The receiving part 3 is in a whole annular structure, and forms an annular receiving groove 4 with the opening at the right end between the inner surface of the first steel pipe 1 and the receiving part 3. Exemplarily, the first steel pipe 1 and the receiving part 3 are an integral molding structure, and are produced by using a customized production mold and are integrally molded, which enhances the strength and rigidity of the connection between the two. Of course, the first steel pipe 1 and the receiving part 3 can also be connected by welding, which is not limited here.

[0047] The left end of the second steel pipe 2 is fixed with a leftward extending spigot 5, which is in a ring structure as a whole, and the left end of the spigot 5 is used for spigot connection in the receiving groove 4. Exemplarily, the second steel pipe 2 and the spigot 5 are in an integrally formed structure, and the two are produced by using a customized production mold and integrally formed, so as to enhance the strength and rigidity of the connection between the two. Of course, the second steel pipe 2 and the spigot 5 can also be connected by welding, which is not specifically limited here.

[0048] The sealing member 6 is used to be arranged between the receiving groove 4 and the spigot 5, so as to enhance the sealing performance after the spigot connection of the first steel pipe 1 and the second steel pipe 2; and the fastener 7 is used to be connected between the receiving part 3 and the spigot 5, so as to enhance the firmness after the spigot connection of the first steel pipe 1 and the second steel pipe 2.

[0049] The steel pipe interface spigot connection structure provided by the embodiment of the present application is used to cooperate the receiving groove 4 with the spigot 5 and arrange the sealing member 6 and the fastener 7, so that in the installation, the sealing member 6 is first placed in the receiving groove 4, the spigot 5 is spigot connected in the receiving groove 4 by external force, and then the receiving part 3 and the spigot 5 are connected together by the fastener 7.

[0050] Compared with the welded interface, the spigot connection structure of the present application does not need to be welded, avoids defects such as welding undercut, porosity, slag inclusion, incomplete fusion, burn-through and welding cracks, eliminates the generation of welding fume, improves the ventilation condition inside the pipeline in the long distance pipe jacking construction, and reduces the harm to the construction personnel. Compared with the flange interface, the spigot connection structure of the present application does not need an additional flange plate, so as to avoid increasing the side wall friction resistance of the pipeline. Therefore, the present application can effectively solve the problem of the limitations of the existing welded interface and flange interface in the pipe jacking construction, and has a wide application prospect. In addition, the installation process of the spigot connection structure is simple and fast, only the spigot 5 needs to be inserted into the receiving groove 4, and the connection can be completed by the fastener 7, so that the construction time is greatly shortened, the construction process does not need to use open flame, the fire risk is effectively avoided, and the safety of the construction is further improved.

[0051] In some embodiments, referring to Figure 1 、 Figure 2 In the direction along the first steel pipe 1 to the second steel pipe 2, the receiving part 3 includes a fixed segment 31 and a receiving segment 32 connected in sequence, the fixed segment 31 is connected with the inner surface of the first steel pipe 1, and the receiving segment 32 is arranged in a spaced manner between the inner surface of the first steel pipe 1 and forms the receiving groove 4 therebetween.

[0052] Correspondingly, the outer surface of the fixed section 31 is attached to and tightly connected with the inner surface of the first steel pipe 1, which can firmly fix the receiving part 3 inside the first steel pipe 1, and ensure that the receiving part 3 will not displace or deform when the first steel pipe 1 bears pressure or external force, thereby providing stable support for the entire connection structure. The receiving section 32 is arranged in a spaced manner with the first steel pipe 1, and an independent receiving groove 4 is formed between the outer surface of the receiving section 32 and the inner surface of the first steel pipe 1. This structure enables the receiving section 32 to focus on tightly fitting with the spigot part 5 of the second steel pipe 2, thereby improving the reliability of the steel pipe joint connection. The first steel pipe 1, the fixed section 31 and the receiving section 32 can be produced by using a customized production mold and integrally formed.

[0053] For example, Figure 1 , Figure 2 In the direction from the first steel pipe 1 to the second steel pipe 2, the inner diameter of the fixed section 31 gradually decreases. For example, the receiving section 32 is a cylindrical structure with equal cross sections, the inner diameter of the left end of the fixed section 31 is equal to the inner diameter of the first steel pipe 1, and the inner diameter of the right end of the fixed section 31 is equal to the inner diameter of the receiving section 32.

[0054] Correspondingly, the fixed section 31 can strengthen the strength and rigidity of the interface of the first steel pipe 1; in the direction from the first steel pipe 1 to the second steel pipe 2, due to the gradual decrease of the inner diameter of the fixed section 31, the inner surface of the fixed section 31 forms an arc surface or an inclined surface structure, which not only gradually increases the wall thickness of the fixed section 31, but also makes the stress distribution more uniform, effectively reduces the stress concentration phenomenon, reduces the risk of connection failure caused by excessive local stress, improves the stability and service life of the connection structure, and also reduces the flow resistance of the liquid at the inner surface of the fixed section 31.

[0055] In some embodiments, referring to Figure 1 , Figure 3 The outer diameter of the spigot part 5 is smaller than the outer diameter of the second steel pipe 2. Correspondingly, since the outer diameter of the spigot part 5 is smaller than the outer diameter of the second steel pipe 2, when the first steel pipe 1 is connected with the second steel pipe 2, a protruding structure is avoided on the outer surface of the pipeline, and the frictional resistance between the outer wall of the pipeline and the soil is avoided during pipe jacking construction.

[0056] In some embodiments, referring to Figure 1 , Figure 3 In the direction from the second steel pipe 2 to the first steel pipe 1, the spigot part 5 includes a connecting section 51 and a spigot section 52 connected in sequence, one end of the connecting section 51 is connected with one end of the second steel pipe 2, and the spigot section 52 is used for spigoting in the receiving groove 4.

[0057] Correspondingly, the right end of the connecting section 51 is fixedly connected with the left end of the second steel pipe 2, so that the splicing part 5 cannot be loosened or separated during use. The splicing section 52 is specially used to tightly fit with the receiving groove 4, so as to improve the reliability of the steel pipe interface connection. The connecting section 51, the splicing section 52 and the second steel pipe 2 can be integrally formed by using a customized production mold.

[0058] For example, Figure 1 , Figure 3 The inner diameter of the connecting section 51 gradually decreases in the direction from the second steel pipe 2 to the first steel pipe 1. For example, the splicing section 52 is a cylindrical structure with equal cross sections, the inner diameter of the right end of the connecting section 51 is equal to the inner diameter of the second steel pipe 2, and the inner diameter of the left end of the connecting section 51 is equal to the inner diameter of the splicing section 52. The wall thickness of the connecting section 51 gradually increases from right to left.

[0059] Correspondingly, the connecting section 51 can strengthen the strength and rigidity of the interface of the second steel pipe 2. In the direction from the second steel pipe 2 to the first steel pipe 1, the inner surface of the connecting section 51 forms an arc surface or an inclined surface structure due to the gradually decreasing inner diameter of the connecting section 51, so that the stress distribution is more uniform, the stress concentration phenomenon is effectively reduced, the risk of connection failure caused by excessive local stress is reduced, the stability and service life of the connection structure are improved, and the flow resistance of the liquid at the inner surface of the connecting section 51 is also reduced.

[0060] In some embodiments, referring to Figure 1 The sealing member 6 includes a first water-swelling sealing strip 61 arranged between the outer surface of the splicing part 5 and the side wall of the receiving groove 4. Specifically, the first water-swelling sealing strip 61 is arranged between the outer surface of the splicing section 52 and the inner surface of the first steel pipe 1.

[0061] Correspondingly, the first water-swelling sealing strip 61 can swell rapidly after contacting water, and the volume can increase by 2-3 times, so as to tightly fill the gap between the outer surface of the splicing section 52 and the inner surface of the first steel pipe 1, form a dense waterproof layer, effectively prevent liquid penetration, and thus improve the sealing performance of the pipeline interface.

[0062] In order to further improve the sealing performance of the pipeline interface, referring to Figure 1 The sealing member 6 further includes a second water-swelling sealing strip 62 arranged between the inner surface of the splicing part 5 and the side wall of the receiving groove 4. Specifically, the second water-swelling sealing strip 62 is arranged between the inner surface of the splicing section 52 and the outer surface of the receiving section 32.

[0063] Correspondingly, the second water-swelling sealing strip 62 can swell rapidly after contacting water, and its volume can increase by 2-3 times, so as to tightly fill the gap between the inner surface of the splicing section 52 and the outer surface of the receiving section 32, and form a compact waterproof layer, which effectively prevents liquid penetration, and further improves the sealing performance of the pipeline interface in cooperation with the waterproof layer formed by the first water-swelling sealing strip 61.

[0064] In some embodiments, referring to Figure 1 , Figure 2 , Figure 3 The bottom of the receiving groove 4 is provided with a first positioning part 41, and the end of the splicing part 5 is provided with a second positioning part 521 which is positioned and matched with the first positioning part 41.

[0065] Correspondingly, in order to facilitate the insertion of the splicing section 52 into the receiving groove 4, the groove width of the receiving groove 4 is slightly greater than the thickness of the splicing section 52, and after the splicing section 52 is inserted into the receiving groove 4, the radial positioning of the splicing section 52 in the receiving groove 4 can be achieved by the cooperation of the first positioning part 41 and the second positioning part 521, so as to prevent the displacement of the two in the radial direction.

[0066] For example, the first positioning part 41 can be a ring-shaped flange, and the second positioning part 521 can be a ring-shaped groove. After the splicing section 52 is inserted into the receiving groove 4, the flange is inserted into the groove for positioning. Of course, the first positioning part 41 can also be a ring-shaped groove, and the second positioning part 521 can also be a ring-shaped flange.

[0067] In some embodiments, referring to Figure 1 The fastener 7 includes bolts 71 which are screwed with the splicing part 5 after passing through the receiving part 3. The bolts 71 can include two groups which are spaced along the axial direction of the pipeline, and each group of bolts 71 includes a plurality of bolts which are uniformly distributed along the circumferential direction of the pipeline.

[0068] For example, the receiving section 32 of the receiving part 3 is provided with a through hole 321 for the bolts 71 to pass through, and the splicing section 52 of the splicing part 5 is provided with an internal thread hole 522 which is screwed with the bolts 71. Correspondingly, after the splicing section 52 is inserted into the receiving groove 4, and the through hole 321 is aligned with the corresponding internal thread hole 522, the bolts 71 are screwed with the internal thread hole 522 after passing through the through hole 321.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements which can be easily thought of by those skilled in the art within the technical scope disclosed in the present application shall be covered within the protection scope of the present application.

Claims

1. A steel pipe joint socket connection structure characterized by comprising: The application relates to a steel pipe joint, which comprises a first steel pipe (1) and a second steel pipe (2), wherein one end of the first steel pipe (1) is provided with a receiving part (3), a receiving groove (4) is formed between the inner surface of the first steel pipe (1) and the receiving part (3), one end of the second steel pipe (2) is provided with a plug-in part (5) which is plugged into the receiving groove (4), a sealing element (6) is arranged between the receiving groove (4) and the plug-in part (5), and the receiving part (3) and the plug-in part (5) are connected through a fastener (7).

2. The steel pipe bell and spigot joint structure according to claim 1, characterized by In the direction from the first steel pipe (1) to the second steel pipe (2), the receiving part (3) comprises a fixed section (31) and a receiving section (32) which are connected in sequence, the fixed section (31) is connected with the inner surface of the first steel pipe (1), and the receiving section (32) is arranged at intervals between the inner surface of the first steel pipe (1) and forms the receiving groove (4) between the inner surface of the first steel pipe (1).

3. The steel pipe bell and spigot joint structure according to claim 2, characterized by In the direction from the first steel pipe (1) to the second steel pipe (2), the inner diameter of the fixed section (31) gradually decreases.

4. The steel pipe bell and spigot joint structure according to claim 1, characterized by The outer diameter of the plug-in part (5) is smaller than the outer diameter of the second steel pipe (2).

5. The steel pipe bell and spigot joint structure according to claim 1, wherein In the direction from the second steel pipe (2) to the first steel pipe (1), the plug-in part (5) comprises a connecting section (51) and a plug-in section (52) which are connected in sequence, one end of the connecting section (51) is connected with one end of the second steel pipe (2), and the plug-in section (52) is used for plugging into the receiving groove (4).

6. The steel pipe bell and spigot joint structure according to claim 5, wherein In the direction from the second steel pipe (2) to the first steel pipe (1), the inner diameter of the connecting section (51) gradually decreases.

7. The steel pipe bell and spigot joint structure according to claim 1, wherein The sealing element (6) comprises a first water-swelling sealing strip (61) which is arranged between the outer surface of the plug-in part (5) and the side wall of the receiving groove (4).

8. The steel pipe bell and spigot joint structure according to claim 7, characterized by The sealing element (6) further comprises a second water-swelling sealing strip (62) which is arranged between the inner surface of the plug-in part (5) and the side wall of the receiving groove (4).

9. The steel pipe bell and spigot joint structure according to claim 1, wherein The bottom of the receiving groove (4) is provided with a first positioning part (41), and the end of the plug-in part (5) is provided with a second positioning part (521) which is positioned and matched with the first positioning part (41).

10. The steel pipe bell and spigot joint structure according to claim 1, characterized by The fastener (7) comprises a bolt (71), and the bolt (71) is screwed with the plug-in part (5) after penetrating through the receiving part (3).

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