Welding limiting mechanism of long oil and gas conveying pipeline

Abstract

The welding limiting mechanism of the long oil and gas conveying pipeline comprises a cross beam, a plurality of vertical holes are evenly formed in the upper surface of the cross beam, two U-shaped screw rods are arranged on the lower side of the cross beam, and the two ends of each U-shaped screw rod penetrate through the two vertical holes respectively and are in threaded connection with nuts. A steel wire rope used for lifting a long oil and gas conveying pipeline is arranged on the lower side of the cross beam, Z-shaped frames are fixedly connected to the two ends of the cross beam correspondingly, vertically-arranged hydraulic cylinders are installed at the ends, away from the cross beam, of the Z-shaped frames, first supports are installed at the cylinder body ends of the hydraulic cylinders, and L-shaped frames are installed in the middles of the back faces of the two first supports correspondingly. A first screw hole is formed in the upper surface of the horizontal portion of the L-shaped frame, a supporting screw rod is in threaded connection with the interior of the first screw hole, and a second support is rotationally installed at the lower end of the supporting screw rod. The hydraulic cylinder has the advantages that the area, supported by the ground, of the hydraulic cylinder is adjusted according to the ground hardness, and the hydraulic cylinder is prevented from sinking.

Description

Technical Field

[0001] The utility model relates to a welding limiting mechanism for long-distance oil and gas pipelines, belonging to the field of long-distance oil and gas pipeline welding. Background Art

[0002] A long-distance oil and gas pipeline refers to a pipeline system used for long-distance transportation of crude oil, refined oil or natural gas. During the laying process of long-distance oil and gas pipelines, they are generally submerged in the pits excavated on the ground. When welding long-distance oil and gas pipelines, the pipelines are lifted to a height away from the bottom of the pit by a hoisting method, so as to facilitate the welding of adjacent two sections of long-distance oil and gas pipelines. A steel wire rope is sleeved on the long-distance oil and gas pipeline, and then after the end of the steel wire rope is limited by a cross beam, the cross beam is driven by a hydraulic cylinder to move upward, so as to lift and limit the position of the long-distance oil and gas pipeline. Due to the uneven hardness of the ground and the certain area of the supporting part of the bottom of the hydraulic cylinder in contact with the ground, for the ground with relatively small hardness, there is a situation where the hydraulic cylinder sinks under the pressure of the long-distance oil and gas pipeline, which is not conducive to the stable limitation of the long-distance oil and gas pipeline. Therefore, it is necessary to design a welding limiting mechanism for long-distance oil and gas pipelines that can adjust the supporting area of the hydraulic cylinder on the ground according to the ground hardness. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a welding limiting mechanism for long-distance oil and gas pipelines to solve the problems put forward in the above background art. The utility model adjusts the supporting area of the hydraulic cylinder on the ground according to the ground hardness to prevent the hydraulic cylinder from sinking.

[0004] In order to achieve the above purpose, the utility model is realized by the following technical solutions: A welding limiting mechanism for long-distance oil and gas pipelines includes a cross beam. A plurality of vertical holes are evenly formed on the upper surface of the cross beam. Two U-shaped screws are arranged on the lower side of the cross beam. The two ends of the U-shaped screws respectively penetrate through the two vertical holes and are threadedly connected with nuts. The nuts are arranged on the upper side of the cross beam. A steel wire rope for supporting the long-distance oil and gas pipeline is arranged on the lower side of the cross beam. The two ends of the steel wire rope are respectively connected with the two U-shaped screws. Z-shaped frames are fixedly connected to both ends of the cross beam. A vertically arranged hydraulic cylinder is installed at one end of the Z-shaped frame far away from the cross beam. A first support is installed at the cylinder end of the hydraulic cylinder. L-shaped frames are installed at the middle positions of the opposite surfaces of the two first supports. A first screw hole is formed on the upper surface of the horizontal part of the L-shaped frame. A support screw is threadedly connected in the first screw hole. A second support is rotatably installed at the lower end of the support screw. A detachable handle is installed at the upper end of the support screw. A detachable extension piece is installed at the end of the horizontal part of the L-shaped frame.

[0005] Further, the lengthening member includes a lengthening rod. The lengthening rod is provided at the end of the horizontal portion of the L-shaped frame. A plug connector is fixedly connected to the side of the lengthening rod close to the L-shaped frame. A first plugging groove adapted to the plug connector is formed on the side of the L-shaped frame facing the lengthening rod. The plug connector is inserted into the first plugging groove. A second plugging groove is formed on the side of the lengthening rod away from the plug connector. The plug connector on one lengthening rod is inserted into the second plugging groove on another lengthening rod. A first threaded hole communicating with the first plugging groove is formed on one side surface of the L-shaped frame. A second threaded hole communicating with the second plugging groove is formed on one side surface of the lengthening rod. Positioning screws are threadedly connected in both the first threaded hole and the second threaded hole. A second threaded hole is formed on the upper surface of the lengthening rod on the side away from the plug connector. A support screw rod is threadedly connected in the second threaded hole.

[0006] Further, the plug connector and the lengthening rod are of an integrally formed structure. The cross-sections of the plug connector, the first plugging groove, and the second plugging groove are all rectangular.

[0007] Further, a threaded blind hole is formed at the upper end of the support screw rod. An external thread is machined at one end of the handle. The end of the handle with the machined external thread is threadedly connected in the threaded blind hole.

[0008] Further, a rib is fixedly connected to the middle position of the upper surface of the cross beam. The rib is arranged along the length direction of the cross beam.

[0009] Further, a bearing is sleeved on the lower end of the support screw rod. The inner ring of the bearing is fixedly connected to the support screw rod. The outer ring of the bearing is fixedly connected to the second support.

[0010] The beneficial effects of the present utility model:

[0011] 1. A plurality of vertical holes are formed in the cross beam to increase or reduce the distance between the two U-shaped screw rods. Then, the two ends of the U-shaped screw rods are respectively passed through the vertical holes at the corresponding positions and then nuts are screwed on. On the one hand, the assembly of the steel wire rope and the cross beam is completed. On the other hand, it is convenient to adjust the opening amplitude of the steel wire rope according to the diameter of the long-distance oil and gas pipeline, meeting the needs of long-distance oil and gas pipelines with different diameters.

[0012] 2. Select an appropriate number of extension rods according to the hardness of the ground where the hydraulic cylinder is located, insert the plug joint on one extension rod into the second plug slot on another extension rod, and use positioning screws to limit the relative positions of adjacent extension rods to complete the assembly of adjacent extension rods. By analogy, complete the assembly of multiple extension rods, connect the structure formed by the multiple extension rods to the L-shaped frame, and then screw support screws into the first screw holes on the L-shaped frame and the second screw holes on the multiple extension rods, so that the second supports at the lower ends of the multiple support screws all contact the ground. At this time, the multiple second supports, the first support, etc. jointly support the hydraulic cylinder, realizing the adjustment of the support area of the hydraulic cylinder by the ground according to the ground hardness, preventing the hydraulic cylinder from sinking, improving the stability of the long-distance oil and gas pipeline limit, and at the same time connecting the extension rods in an assembled manner, which is convenient for separate storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects, and advantages of the present utility model will become more apparent from the following detailed description of non-limiting embodiments when read in conjunction with the accompanying drawings:

[0014] Figure 1 FIG. is a schematic structural diagram of a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0015] Figure 2 FIG. is an assembly schematic diagram of a U-shaped screw, a steel wire rope, and a cross beam in a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0016] Figure 3 FIG. is an assembly schematic diagram of a U-shaped screw and a steel wire rope in a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0017] Figure 4 FIG. is an assembly schematic diagram of a second support, a support screw, and an L-shaped frame in a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0018] Figure 5 FIG. is a perspective view of an L-shaped frame in a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0019] Figure 6 FIG. is an assembly schematic diagram of a plug joint and an extension rod in a welding limit mechanism for a long-distance oil and gas pipeline of the present utility model;

[0020] In the figure: 1 - crossbeam, 2 - steel wire rope, 3 - first support, 4 - hydraulic cylinder, 5 - second support, 6 - positioning screw, 7 - extension rod, 8 - support screw rod, 9 - handle, 10 - Z-shaped frame, 11 - rib, 12 - nut, 13 - L-shaped frame, 14 - U-shaped screw rod, 15 - vertical hole, 16 - first insertion slot, 17 - first screw hole, 18 - first threaded hole, 19 - plug joint, 20 - second screw hole, 21 - second insertion slot, 22 - second threaded hole. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a welding limiting mechanism for long-distance oil and gas pipelines, including a crossbeam 1. A plurality of vertical holes 15 are evenly opened on the upper surface of the crossbeam 1. Two U-shaped screw rods 14 are arranged on the lower side of the crossbeam 1. The two ends of the U-shaped screw rod 14 respectively penetrate through the two vertical holes 15 and are threadedly connected with nuts 12. The nuts 12 are arranged on the upper side of the crossbeam 1. A steel wire rope 2 for supporting the long-distance oil and gas pipeline is arranged on the lower side of the crossbeam 1. The two ends of the steel wire rope 2 are respectively connected with the two U-shaped screw rods 14. By opening a plurality of vertical holes 15 on the crossbeam 1, the distance between the two U-shaped screw rods 14 is increased or reduced, and then the two ends of the U-shaped screw rod 14 are respectively penetrated through the vertical holes 15 at the corresponding positions and the nuts 12 are screwed on. On the one hand, the assembly of the steel wire rope 2 and the crossbeam 1 is completed, and on the other hand, it is convenient to adjust the opening amplitude of the steel wire rope 2 according to the diameter of the long-distance oil and gas pipeline, meeting the needs of long-distance oil and gas pipelines with different diameters. A rib 11 is fixedly connected to the middle position of the upper surface of the crossbeam 1. The rib 11 is arranged along the length direction of the crossbeam 1, and the rib 11 improves the bending resistance of the crossbeam 1.

[0023] Refer to Figures 1 - 3 , Z-shaped frames 10 are fixedly connected to both ends of the crossbeam 1. A vertically arranged hydraulic cylinder 4 is installed at one end of the Z-shaped frame 10 away from the crossbeam 1. The cylinder end of the hydraulic cylinder 4 is installed with a first support 3 to make the first support 3 contact the ground. Then, after the steel wire rope 2 is sleeved on the long-distance oil and gas pipeline and connected to the crossbeam 1, the hydraulic cylinder 4 is controlled to extend. The hydraulic cylinder 4 drives the crossbeam 1 to move upward, so that the steel wire rope 2 hoists the long-distance oil and gas pipeline, making the end of the long-distance oil and gas pipeline in a suspended state, realizing the limitation of the long-distance oil and gas pipeline and facilitating the welding of adjacent two sections of long-distance oil and gas pipelines.

[0024] Refer to Figure 1 , Figure 4 and Figure 5, L-shaped brackets 13 are installed at the middle positions of the backs of the two first supports 3. A first screw hole 17 is provided on the upper surface of the horizontal part of the L-shaped bracket 13. A support screw 8 is threadedly connected in the first screw hole 17. A second support 5 is rotatably installed at the lower end of the support screw 8. A bearing is sleeved at the lower end of the support screw 8. The inner ring of the bearing is fixedly connected to the support screw 8, and the outer ring of the bearing is fixedly connected to the second support 5. A detachable handle 9 is installed at the upper end of the support screw 8. A threaded blind hole is provided at the upper end of the support screw 8, and an external thread is processed at one end of the handle 9, so that the end of the handle 9 with the external thread is threadedly connected in the threaded blind hole, which is convenient for the disassembly and assembly of the handle 9 and the support screw 8.

[0025] Refer to Figures 1 - 6 , an extension rod 7 is provided at the end of the horizontal part of the L-shaped bracket 13. A plug joint 19 with a rectangular cross-section is fixedly connected to the side of the extension rod 7 close to the L-shaped bracket 13. The plug joint 19 and the extension rod 7 are integrally formed. A first plug slot 16 with a rectangular cross-section that matches the plug joint 19 is provided on the side of the L-shaped bracket 13 facing the extension rod 7. The plug joint 19 is inserted into the first plug slot 16. A second plug slot 21 with a rectangular cross-section is provided on the side of the extension rod 7 away from the plug joint 19. The plug joint 19 on one extension rod 7 is inserted into the second plug slot 21 on another extension rod 7. A first threaded hole 18 communicating with the first plug slot 16 is provided on one side of the L-shaped bracket 13. A second threaded hole 22 communicating with the second plug slot 21 is provided on one side of the extension rod 7. Positioning screws 6 are threadedly connected in both the first threaded hole 18 and the second threaded hole 22. A second screw hole 20 is provided on the upper surface of the extension rod 7 away from the plug joint 19. A support screw 8 is threadedly connected in the second screw hole 20. According to the hardness of the ground where the hydraulic cylinder 4 is located, select an appropriate number of extension rods 7, so that the plug joint 19 on one extension rod 7 is inserted into the second plug slot 21 on another extension rod 7, and use the positioning screws 6 to limit the relative positions of two adjacent extension rods 7 to achieve the assembly of two adjacent extension rods 7. By analogy, complete the assembly of multiple extension rods 7, so that the structure formed by multiple extension rods 7 is connected to the L-shaped bracket 13. Then, screw the support screws 8 into both the first screw holes 17 on the L-shaped bracket 13 and the second screw holes 20 on multiple extension rods 7, so that the second supports 5 at the lower ends of multiple support screws 8 all contact the ground. At this time, multiple second supports 5, first supports 3, etc. jointly support the hydraulic cylinder 4, realizing the adjustment of the support area of the hydraulic cylinder 4 by the ground according to the ground hardness, preventing the hydraulic cylinder 4 from sinking, improving the stability of the long-distance oil and gas pipeline limit, and at the same time making the extension rods 7 connected in an assembled manner, which is convenient for separate storage and transportation.

[0026] Although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding limiting mechanism for a long-distance oil and gas pipeline, comprising a cross beam (1), characterized in that: The upper surface of the cross beam (1) is evenly provided with a plurality of vertical holes (15). There are two U-shaped screw rods (14) arranged on the lower side of the cross beam (1). The two ends of the U-shaped screw rod (14) respectively penetrate through the two vertical holes (15) and are threadedly connected with nuts (12). The nuts (12) are arranged on the upper side of the cross beam (1). A steel wire rope (2) for supporting the long-distance oil and gas pipeline is arranged on the lower side of the cross beam (1). The two ends of the steel wire rope (2) are respectively connected with the two U-shaped screw rods (14). Z-shaped frames (10) are fixedly connected to both ends of the cross beam (1). A vertically arranged hydraulic cylinder (4) is installed at one end of the Z-shaped frame (10) away from the cross beam (1). A first support (3) is installed at the cylinder body end of the hydraulic cylinder (4). L-shaped frames (13) are installed at the middle positions of the opposite sides of the two first supports (3). A first screw hole (17) is provided on the upper surface of the horizontal part of the L-shaped frame (13). A support screw rod (8) is threadedly connected in the first screw hole (17). A second support (5) is rotatably installed at the lower end of the support screw rod (8). A detachable handle (9) is installed at the upper end of the support screw rod (8). A detachable lengthening piece is installed at the end of the horizontal part of the L-shaped frame (13).

2. The welding limit mechanism for a long-distance oil and gas pipeline according to claim 1, characterized in that: The lengthening piece includes a lengthening rod (7). A lengthening rod (7) is provided at the end of the horizontal part of the L-shaped frame (13). A plug connector (19) is fixedly connected to the surface of the lengthening rod (7) close to the L-shaped frame (13). A first plug-in groove (16) matching the plug connector (19) is provided on the surface of the L-shaped frame (13) facing the lengthening rod (7). The plug connector (19) is inserted into the first plug-in groove (16). A second plug-in groove (21) is provided on the surface of the lengthening rod (7) away from the plug connector (19). The plug connector (19) on one lengthening rod (7) is inserted into the second plug-in groove (21) on the other lengthening rod (7). A first threaded hole (18) communicating with the first plug-in groove (16) is provided on one side surface of the L-shaped frame (13). A second threaded hole (22) communicating with the second plug-in groove (21) is provided on one side surface of the lengthening rod (7). Positioning screws (6) are threadedly connected in both the first threaded hole (18) and the second threaded hole (22). A second screw hole (20) is provided on the upper surface of the lengthening rod (7) away from the plug connector (19). A support screw rod (8) is threadedly connected in the second screw hole (20).

3. The welding limiting mechanism for a long-distance oil and gas pipeline according to claim 2, characterized in that: The plug connector (19) and the lengthening rod (7) are of an integrally formed structure. The cross sections of the plug connector (19), the first plug-in groove (16), and the second plug-in groove (21) are all rectangular.

4. A welding limit mechanism for a long-distance oil and gas pipeline according to claim 1, characterized in that: A threaded blind hole is provided at the upper end of the support screw rod (8). An external thread is processed at one end of the handle (9). The end of the handle (9) processed with the external thread is threadedly connected in the threaded blind hole.

5. The welding limit mechanism for a long-distance oil and gas pipeline according to claim 1, characterized in that: A rib (11) is fixedly connected to the middle position of the upper surface of the cross beam (1). The rib (11) is arranged along the length direction of the cross beam (1).

6. The welding limit mechanism for a long-distance oil and gas pipeline according to claim 1, characterized in that: A bearing is sleeved on the lower end of the support screw rod (8). The inner ring of the bearing is fixedly connected to the support screw rod (8), and the outer ring of the bearing is fixedly connected to the second support (5).

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