A connecting piece for misalignment of steel pipes

Abstract

The utility model relates to the field of steel pipe connecting piece, concretely relates to a connecting piece for steel pipe misplacement, including first connecting assembly and second connecting assembly, is equipped with the groove board with curved groove and the fixed link with connecting column in one end of the expansion tight connector of first connecting assembly and second connecting assembly respectively, utilizes the connecting column to insert in the curved groove of groove board, its position can be adjusted in the curved groove arbitrarily, and the connecting column is detachably fixed on the groove board, make the distance between first connecting assembly and second connecting assembly for connecting first steel pipe and second steel pipe adjustable and satisfy the need of steel pipe misplacement connection, utilize the wedge extrusion between the expansion tight pipe and the tapered sleeve set up with the expansion tight connector of first connecting assembly and second connecting assembly and expand tightly, make this connecting piece and first steel pipe and second steel pipe connect through expansion tight and do not need to screw, thereby can satisfy the steel pipe of misplacement in smaller space and carry out fast connection, can improve the convenience of misplacement steel pipe connection.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe connectors, specifically to a connector for misaligning steel pipes. Background Technology

[0002] In engineering, steel pipes are often used as support or suspension members. Adjacent steel pipes are usually welded together or bolted together on-site using straight joints. If a steel pipe needs to bend, it is either pre-bent and welded on-site or multiple elbow joints are used to change the direction. Since pre-bending and on-site welding are not feasible at some construction sites, multiple elbow joints are often used to combine and bolt together steel pipes that need to bend. However, at some construction sites, adjacent steel pipes need to be staggered, and the space for staggering is too small to accommodate the elbow for bolting. Therefore, a connector is needed that can accommodate staggered steel pipe connections in limited space. This case arises from this need. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model discloses a connector for misaligned steel pipes, including a first connecting component and a second connecting component. The first connecting component and the second connecting component are respectively provided with an expansion joint that can be expanded and tightened to the first steel pipe and the second steel pipe. Each of the first connecting component and the second connecting component is provided with a groove plate with a curved groove or a fixing component with a connecting post at one end of its corresponding expansion joint. The connecting post can be inserted into the curved groove of the groove plate and its position is adjustable. The connecting post and the groove plate are detachably fixed. The present invention discloses a connector for misaligned steel pipes. A connecting post is inserted into a curved groove in a channel plate, and its position can be adjusted arbitrarily within the groove. The connecting post is detachably fixed to the channel plate, allowing the distance between the first and second connecting components used to connect the first and second steel pipes to be adjustable to meet the needs of misaligned steel pipe connections. Expansion is achieved through wedge-shaped compression between the expansion tube and the conical sleeve in the expansion joints of the first and second connecting components. This allows the connector to be connected to the first and second steel pipes through expansion without the need for screws, enabling rapid connection of misaligned steel pipes in a confined space and improving the convenience of connecting misaligned steel pipes.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A connector for misaligned steel pipes is used to connect a first steel pipe and a second steel pipe with misaligned centerlines and the same outer diameter. The connector comprises a first connecting component and a second connecting component. The first and second connecting components are respectively provided with expansion joints that can be expanded and tightened to the first and second steel pipes, and the expansion joints of the first and second connecting components are opposite to each other. The first connecting component has a grooved plate with a curved groove at the non-expansion end of its expansion joint, and the second connecting component has a fixing member with a connecting post at the non-expansion end of its expansion joint. The connecting post of the second connecting component can be inserted into the curved groove of the grooved plate of the first connecting component, and the position of the connecting post in the curved groove is adjustable. The connecting post and the grooved plate are detachably fixed together.

[0006] The expansion joint includes an expansion tube, which is a circular straight tube with an inner diameter larger than the outer diameter of the first or second steel pipe to be connected. Preferably, the difference between the inner diameter of the expansion tube and the outer diameter of the first or second steel pipe does not exceed 1 mm. The two ends of the expansion tube are expansion ends and non-expansion ends, respectively. The outer surface of the expansion end is a conical surface and several opening grooves are evenly distributed on the tube wall at this end. The expansion end can elastically deform slightly. When subjected to radial compression by external force, it can tighten towards the center to securely connect the expansion tube with the first or second steel pipe inserted in the expansion tube.

[0007] The expansion joint also includes a sleeve, which is a circular ring with external threads on the outer wall of one end. The sleeve is fitted around the expansion end of the expansion tube. The non-threaded end of the sleeve is provided with a circular plate with a through hole, and the sleeve is fixed to the expansion tube by the circular plate. After the sleeve is fitted and fixed to the expansion tube, there is a gap between the inner wall of the sleeve and the outer wall of the expansion tube.

[0008] The expansion joint also includes a conical sleeve, which is a circular annular sleeve with a conical inner surface and a cylindrical outer surface. The taper of its conical surface is the same as that of the expansion tube. The conical sleeve is placed in the gap between the inner wall of the sleeve and the outer wall of the expansion tube and can slide along the axial direction of the expansion tube. The conical inner wall of the conical sleeve abuts against the conical outer wall of the expansion tube.

[0009] The expansion joint also includes a screw-on top cover, which is a circular cover with a double-ringed rim and a through hole in the middle. The inner wall of the outer ring has an internal thread that matches the external thread on the sleeve. The end face of the inner ring is a push-up surface. The screw-on top cover can be screwed onto the sleeve. When the screw-on top cover is screwed in, its push-up surface can abut against the end face of the conical sleeve to drive the conical sleeve to slide along the axial direction of the expansion tube.

[0010] The groove plate is an elliptical flat plate, and the curve trajectory of the center line of its curved groove is elliptical. The ellipse of the curved trajectory is similar to and concentric with the ellipse of the groove plate. The arc length between the two endpoints of the curved groove does not exceed three-quarters of the total arc length of the ellipse of the curved trajectory formed by the center line of the curved groove.

[0011] The non-expansion end of the expansion tube of the first connecting component is fixed to the groove plate, and the center of the expansion tube is placed on one end of the major axis of the ellipse of the curved trajectory formed by the center line of the curved groove. Preferably, the straight distance a between one end of the curved groove and the center of the expansion tube does not exceed the outer diameter of the expansion tube, and the other end of the curved groove crosses the other end of the major axis of the ellipse of the curved trajectory formed by the center line of the curved groove, with an overshoot angle t < 10°.

[0012] The fastener is further provided with a connecting plate, which is fixed to the non-expansion end of the expansion tube of the expansion connector of the second connecting assembly. The connecting post is a stepped round shaft, one end of which is fixed to the connecting plate and the other end of which is threaded. The connecting post can be inserted into the curved groove of the slot plate and can be locked to the slot plate with a nut.

[0013] As described above, the advantages of the steel pipe misalignment connector provided by this utility model are as follows: One end of the expansion joint of the first connecting component and the second connecting component is respectively provided with a grooved plate with a curved groove and a fixing member with a connecting post. Firstly, the connecting post is inserted into the curved groove of the grooved plate, and its position can be adjusted arbitrarily within the groove. The connecting post is detachably fixed to the grooved plate, making the distance between the first connecting component and the second connecting component adjustable to meet the needs of misaligned steel pipe connection. Secondly, the wedge-shaped compression between the expansion tube and the conical sleeve in the expansion joint of the first and second connecting components allows the connector to be connected to the first and second steel pipes through expansion without the need for screws. This allows for rapid connection of misaligned steel pipes in a small space, improving the convenience of connecting misaligned steel pipes. This utility model has a reasonable design, simple structure, low cost, and is easy to promote. Attached Figure Description

[0014] Figure 1 This is a general schematic diagram of a connector for misaligned steel pipes according to the present invention;

[0015] Figure 2 for Figure 1 AA diagram in the image;

[0016] Figure 3 This is a schematic diagram of the first connecting component;

[0017] Figure 4 This is an enlarged schematic diagram of the expansion joint;

[0018] Figure 5 for Figure 4 A magnified diagram of BB in the image;

[0019] Figure 6 This is an enlarged schematic diagram of the expansion tube;

[0020] Figure 7 An enlarged diagram showing the top cover being screwed on;

[0021] Figure 8 This is a schematic diagram of the groove plate;

[0022] Figure 9 This is an enlarged schematic diagram of the second connecting component.

[0023] Figure label:

[0024] 1 First connecting assembly; 11 Expansion connector; 111 Expansion tube; 1111 Opening groove; 112 Pipe sleeve; 113 Conical sleeve; 114 Tightening top cover; 1141 Pushing surface; 12 Groove plate; 121 Curved groove; 2 Second connecting assembly; 21 Fixed fastener; 211 Connecting plate; 212 Connecting column; 800 First steel pipe; 900 Second steel pipe. Detailed Implementation

[0025] The present invention will be further described below through specific embodiments.

[0026] like Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, the present invention discloses a connector for misaligned steel pipes, used to connect a first steel pipe 800 and a second steel pipe 900 with misaligned centerlines and the same outer diameter. It includes a first connecting component 1 and a second connecting component 2. The first connecting component 1 and the second connecting component 2 are respectively provided with expansion joints 11 that can be expanded and tightened to the first steel pipe 800 and the second steel pipe 900. The expansion joints 11 of the first connecting component 1 and the second connecting component 2 are opposite to each other. The first connecting component 1 has a groove plate 12 with a curved groove 121 at the non-expansion end of its expansion joint 11. The second connecting component 2 has a fixing member 21 with a connecting post 212 and a connecting plate 211 at the non-expansion end of its expansion joint 11. The connecting post 212 of the second connecting component 2 can be inserted into the curved groove 121 of the groove plate 12 of the first connecting component 1, and the position of the connecting post 212 in the curved groove 121 is adjustable. The connecting post 212 and the groove plate 12 are detachably fixed together.

[0027] like Figure 1 , Figures 3 to 7As shown, the expansion joint 11 of this utility model includes an expansion tube 111, a sleeve 112, a conical sleeve 113, and a screw-on top cover 114. The expansion tube 111 is a circular straight tube with an inner diameter larger than the outer diameter of the first steel pipe 800 or the second steel pipe 900 to be connected. In this embodiment, the difference between the inner diameter of the expansion tube 111 and the outer diameter of the first steel pipe 800 or the second steel pipe 900 does not exceed 1 mm. The two ends of the expansion tube 111 are the expansion end and the non-expansion end, respectively. The outer surface of the expansion end is a conical surface, and several opening grooves 1111 are evenly distributed on the tube wall of the expansion end. The expansion end can elastically deform slightly. When subjected to radial compression by external force, it can tighten towards the center to securely connect the expansion tube 111 with the first steel pipe 800 or the second steel pipe 900 inserted in the expansion tube 111. The sleeve 112 is a circular ring with external threads on one end of its outer wall. The sleeve 112 is fitted around the expansion end of the expansion tube 111. The non-threaded end of the sleeve 112 has a circular plate with a through hole, and the sleeve 112 is fixed to the expansion tube 111 using the circular plate. After the sleeve 112 is fitted and fixed to the expansion tube 111, a gap exists between the inner wall of the sleeve 112 and the outer wall of the expansion tube 111. The conical sleeve 113 is a circular ring with a conical inner surface and a cylindrical outer surface. The taper of its conical surface is the same as the taper of the conical surface of the expansion tube 111. The conical sleeve 113 is placed in the gap between the inner wall of the sleeve 112 and the outer wall of the expansion tube 111 and can slide along the axial direction of the expansion tube 111. The conical inner wall of the conical sleeve 113 abuts against the conical outer wall of the expansion tube 111. The tightening top cover 114 is a circular cover with a double-ringed rim and a through hole in the middle. It has an internal thread on the inner wall of its outer ring, which matches the external thread on the sleeve 112. The end face of its inner ring is a push surface 1141. The tightening top cover 114 can be screwed onto the sleeve 112. When the tightening top cover 114 is screwed in, its push surface 1141 can abut against the end face of the tapered sleeve 113 to drive the tapered sleeve 113 to slide along the axial direction of the expansion tube 111.

[0028] like Figure 1 , Figure 2 and Figure 8As shown, the groove plate 12 of this utility model is an elliptical flat plate. The curve trajectory of the center line of its curved groove 121 is elliptical, and the ellipse of this curve trajectory is similar to and concentric with the ellipse of the groove plate 12. The arc length between the two endpoints of the curved groove 121 does not exceed three-quarters of the total arc length of the ellipse trajectory formed by the center line of the curved groove 121. The non-expansion end of the expansion tube 111 of the first connecting component 1 is fixed to the groove plate 12, and the center of the expansion tube 111 is located at one endpoint of the major axis of the ellipse trajectory formed by the center line of the curved groove 121. In this embodiment, the straight-line distance 'a' between one endpoint of the curved groove 121 and the center of the expansion tube 111 does not exceed the outer diameter of the expansion tube 111. The other endpoint of the curved groove 121 crosses the other endpoint of the major axis of the ellipse trajectory formed by the center line of the curved groove 121, and its overshoot angle t < 10°.

[0029] like Figure 1 , Figure 4 and Figure 9 As shown, the connecting plate 211 of this utility model is fixedly connected to the non-expansion end of the expansion tube 111 of the expansion connector 11 of the second connecting assembly 2. The connecting post 212 is a stepped round shaft, one end of which is fixedly connected to the connecting plate 211, and the other end of which is threaded. The connecting post 212 can be inserted into the curved groove 121 of the groove plate 12 and can be locked onto the groove plate 12 with a nut.

[0030] The present invention discloses a connector for misaligned steel pipes. At one end of the expansion joint 11 of the first connecting component 1 and the second connecting component 2, there is a groove plate 12 with a curved groove 121 and a fixing member 21 with a connecting post 212, respectively. The connecting post 212 is inserted into the curved groove 121 of the groove plate 12, and its position can be adjusted arbitrarily within the curved groove 121. The connecting post 212 is detachably fixed to the groove plate 12, making the distance between the first connecting component 1 and the second connecting component 2 for connecting the first steel pipe 800 and the second steel pipe 900 adjustable to meet the needs of misaligned steel pipe connection. Expansion is achieved by the wedge-shaped compression between the expansion tube 111 and the conical sleeve 113 of the expansion joint 11 of the first connecting component 1 and the second connecting component 2, allowing the connector to be connected to the first steel pipe 800 and the second steel pipe 900 through expansion without screwing. This allows for rapid connection of misaligned steel pipes in a small space, improving the convenience of connecting misaligned steel pipes.

[0031] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A connector for misaligned steel pipes, used to connect a first steel pipe (800) and a second steel pipe (900) with misaligned centerlines and the same outer diameter, characterized in that: The assembly includes a first connecting component (1) and a second connecting component (2). The first connecting component (1) and the second connecting component (2) are respectively provided with expansion joints (11) that can be expanded and tightened to the first steel pipe (800) and the second steel pipe (900). The expansion joints (11) of the first connecting component (1) and the expansion joints (11) of the second connecting component (2) are opposite to each other. The first connecting component (1) has a curved end on the non-expansion end of its expansion joint (11). The groove plate (12) of the wire groove (121) has a fastener (21) with a connecting post (212) on the non-expanding end of its expansion connector (11). The connecting post (212) of the second connecting component (2) can be inserted into the curved groove (121) of the groove plate (12) of the first connecting component (1), and the position of the connecting post (212) in the curved groove (121) is adjustable. The connecting post (212) and the groove plate (12) are detachably fastened together.

2. The connector for misaligned steel pipes according to claim 1, characterized in that: The expansion joint (11) includes an expansion tube (111), which is a circular straight tube with an inner diameter larger than the outer diameter of the first steel pipe (800) or the second steel pipe (900) to be connected. The two ends of the expansion tube (111) are expansion ends and non-expansion ends, respectively. The outer surface of the expansion end is a conical surface and several opening grooves (1111) are evenly distributed on the tube wall at that end.

3. A connector for misaligned steel pipes according to claim 2, characterized in that: The expansion joint (11) further includes a sleeve (112), which is a circular ring with external threads on the outer wall of one end. The sleeve (112) is fitted around the expansion end of the expansion tube (111), and the non-threaded end of the sleeve (112) is fixed to the expansion tube (111). After the sleeve (112) is fitted and fixed to the expansion tube (111), there is a gap between the inner wall of the sleeve (112) and the outer wall of the expansion tube (111).

4. A connector for misaligned steel pipes according to claim 3, characterized in that: The expansion joint (11) further includes a conical sleeve (113), which is a circular annular sleeve with a conical inner surface and a cylindrical outer surface. The taper of its conical surface is the same as that of the conical surface of the expansion tube (111). The conical sleeve (113) is placed in the gap between the inner wall of the sleeve (112) and the outer wall of the expansion tube (111) and can slide along the axial direction of the expansion tube (111). The conical inner wall of the conical sleeve (113) abuts against the conical outer wall of the expansion tube (111).

5. A connector for misaligned steel pipes according to claim 4, characterized in that: The expansion joint (11) further includes a screw-on top cover (114), which is a circular cover with a double circular rim, a through hole in the middle, an internal thread on the inner wall of its outer ring, and the internal thread matches the external thread on the sleeve (112). The end face of its inner ring is set as a push surface (1141). The screw-on top cover (114) can be screwed onto the sleeve (112). When the screw-on top cover (114) is screwed in, its push surface (1141) can abut against the end face of the conical sleeve (113).

6. A connector for misaligned steel pipes according to claim 5, characterized in that: The groove plate (12) is an elliptical flat plate. The curve trajectory of the center line of the curved groove (121) is elliptical. The ellipse of the curve trajectory is similar to and concentric with the ellipse of the groove plate (12). The arc length between the two endpoints of the curved groove (121) does not exceed three-quarters of the total arc length of the ellipse of the curve trajectory formed by the center line of the curved groove (121).

7. A connector for misaligned steel pipes according to claim 6, characterized in that: The non-expansion end of the expansion tube (111) of the first connecting assembly (1) is fixed to the groove plate (12), and the center of the expansion tube (111) is placed at one end of the major axis of the ellipse of the curved trajectory formed by the center line of the curved groove (121).

8. A connector for misaligned steel pipes according to claim 7, characterized in that: The fastener (21) is also provided with a connecting plate (211), which is fixed to the non-expansion end of the expansion tube (111) of the expansion connector (11) of the second connecting assembly (2). The connecting post (212) is a stepped round shaft, one end of which is fixed to the connecting plate (211) and the other end of which is threaded. The connecting post (212) can be inserted into the curved groove (121) of the groove plate (12) and can be locked on the groove plate (12) with a nut.

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