Automatic fastening device for petrochemical high-pressure pipeline flange

Abstract

The utility model discloses an automatic fastening device for petrochemical high-pressure pipeline flanges, which comprises two U-shaped bottom beams, two shaft support plates and a pipe brace, the shaft support plates are fixedly bolted at the top ends of the U-shaped bottom beams, the pipe brace is mounted at the top ends of the U-shaped bottom beams on one sides of the two shaft support plates, and a pressure plate is arranged on one side, far away from the shaft support plates, of the pipe brace. A main shaft is rotationally installed between the two shaft carrying plates, and a connecting rod type pushing structure used for pushing the pressing disc to be away from the pipe supporting device is installed on the surface of the main shaft. In the initial stage of construction of the petrochemical high-pressure pipelines, the petrochemical high-pressure pipelines penetrate through the pipe supporting device until flanges of the petrochemical high-pressure pipelines are located on one side of the pressing disc, after the two petrochemical high-pressure pipelines are bolted through the flanges, the gear motor drives the main shaft to rotate, and the main shaft forces the pressing disc to press the flanges tightly through the connecting rod type pushing structure; and the flange is kept in a fastening state.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure pipeline flange technology, specifically an automatic fastening device for petrochemical high-pressure pipeline flanges. Background Technology

[0002] Flange connections in petrochemical high-pressure pipelines play a crucial role in the industry, primarily ensuring reliable pipeline connections and safe operation under high pressure and high temperature conditions. Their core functions include sealing, connection reliability, ease of maintenance, and segmented system connections. Through the combination of gaskets and fasteners, flange connections effectively prevent media leakage, ensure operational safety, and facilitate pipeline disassembly and maintenance, reducing downtime. Structurally, a flange connection consists of a flange plate, gaskets, bolts and nuts, and flange faces. Flange plates are diverse, with different types selected based on specific operating conditions. Its working principle is to apply uniform pressure by tightening bolts, so that the sealing gasket and flange face can fully contact each other, filling the gaps and thus achieving a seal. In high-pressure environments, a well-designed flange face and high-strength bolts ensure the sealing performance and mechanical strength of the connection. However, at critical flange locations in petrochemical high-pressure pipelines, the medium inside the pipeline exerts enormous pressure on the connection, and the sealing state between the flange faces directly affects the risk of leakage. Over time, factors such as pipeline vibration, thermal expansion and contraction, and pressure fluctuations can cause the sealing gasket between the flange faces to gradually deform, compress, or loosen, increasing the risk of leakage and rupture. To ensure the sealing effect and the stability of the mechanical connection, the flange connection must be tightened regularly, that is, pressure must be reapplied using fasteners (such as bolts and nuts) to ensure that the sealing gasket fits tightly and prevents leakage. This requires periodic inspection and maintenance by staff. However, frequent tightening can cause mechanical fatigue of the flange face and bolts, leading to bolt breakage or deformation, increasing the difficulty of maintenance. Secondly, repeated disassembly and assembly may damage the sealing gasket, reduce the sealing effect, and increase the risk of leakage. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic flange fastening device for petrochemical high-pressure pipelines. In the initial stage of petrochemical high-pressure pipeline construction, the petrochemical high-pressure pipeline passes through the pipe support until the flange of the petrochemical high-pressure pipeline is located on one side of the pressure plate. After the two petrochemical high-pressure pipelines are bolted together by the flange, the drive shaft of the geared motor rotates, and the shaft forces the pressure plate to press the flange tightly through the connecting rod type push structure, keeping the flange in a fastened state, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic fastening device for petrochemical high-pressure pipeline flanges, comprising two U-shaped bottom beams, axle load plates bolted to the top of the two U-shaped bottom beams, and pipe supports installed on the top of the U-shaped bottom beams on one side of the two axle load plates. A pressure plate is provided on the side of the pipe support away from the axle load plate. A main shaft is rotatably mounted between the two axle load plates. A linkage-type jacking structure for pushing the pressure plate away from the pipe support is installed on the surface of the main shaft. A reduction motor for driving the rotation of the main shaft is installed on the outer wall of one side of one of the axle load plates.

[0005] Preferably, the tube support includes a support base bolted to one side of the top of the two U-shaped bottom beams and a C-shaped sleeve installed on the top of the support base.

[0006] Preferably, after the petrochemical high-pressure pipeline is installed in the upper end of the support base, the upper end of the support base and the lower end of the C-port sleeve are welded together.

[0007] Preferably, the outer wall of the pressure plate away from the tube support is provided with a plurality of annular through holes at equal intervals.

[0008] Preferably, the linkage-type jacking structure includes two rear swing arms fixed to the outer circumference of the main shaft, a connecting block bolted to the outer wall of the two rear swing arms on opposite sides, and a fisheye connecting rod hinged to the lower end of the connecting block, one end of the fisheye connecting rod being hinged to one side of the outer wall of the pressure plate.

[0009] Preferably, a back ring is fixed on the outer wall of the pressure plate near the tube support, and a protruding foot is integrally formed on one side of the outer wall of the back ring. The protruding foot and one end of the fisheye connecting rod are hinged to each other.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This automatic flange fastening device for petrochemical high-pressure pipelines, through a structure consisting of a pipe support, a geared motor, a main shaft, a connecting rod-type jacking structure, and a pressure plate working together, allows the petrochemical high-pressure pipeline to pass through the pipe support in the initial stage of pipeline construction until the flange of the petrochemical high-pressure pipeline is located on one side of the pressure plate. After the two petrochemical high-pressure pipelines are bolted together through the flange, the geared motor drives the main shaft to rotate, and the main shaft forces the pressure plate to press the flange tightly through the connecting rod-type jacking structure, keeping the flange in a fastened state. The geared motor driving the main shaft, which in turn drives the connecting rod-type jacking structure, enables uniform and stable pressure application, ensuring a tight seal on the flange surface. The gasket is fully compressed, improving sealing performance and ensuring that the high-pressure pipeline flange remains secure during operation. This not only enhances the uniformity of tightening but also reduces errors caused by human operation, thereby significantly improving the safety and reliability of the connection. Secondly, in high-pressure and hazardous working environments, manual repeated tightening and disassembly operations pose certain risks and difficulties. However, the motor-driven linkage-type jacking structure and pressure plate allow for quick and convenient release or retightening of the flange when maintenance or repair is required, saving significant time and manpower. Furthermore, it eliminates the need for repeated operation of bolts and other fasteners on the flange, reducing daily maintenance wear on fasteners and extending the service life of the high-pressure pipeline flange. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0015] Figure 5 This is a schematic diagram of the three-dimensional structure of the pressure plate of this utility model.

[0016] In the diagram: 1. U-shaped bottom beam; 2. Axle load plate; 3. Main shaft; 4. Gear motor; 5. Linkage type jacking structure; 501. Rear swing arm; 502. Connecting block; 503. Fish eye connecting rod; 504. Back ring; 505. Protruding foot; 6. Pressure plate; 601. Through hole; 7. Pipe support; 701. Support seat; 702. C-type sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] Please see Figure 1-5 An embodiment of this utility model provides an automatic fastening device for petrochemical high-pressure pipeline flanges, comprising two U-shaped bottom beams 1, axle load plates 2 bolted to the top of the two U-shaped bottom beams 1, and pipe supports 7 installed on the top of the U-shaped bottom beams 1 on one side of the two axle load plates 2. A pressure plate 6 is provided on the side of the pipe support 7 away from the axle load plates 2. A main shaft 3 is rotatably installed between the two axle load plates 2. A linkage-type jacking structure 5 for pushing the pressure plate 6 away from the pipe support 7 is installed on the surface of the main shaft 3. A reduction motor 4 for driving the rotation of the main shaft 3 is installed on the outer wall of one side of one of the axle load plates 2.

[0019] The pipe support 7 includes a support seat 701 bolted to one side of the top of two U-shaped bottom beams 1 and a C-shaped sleeve 702 installed on the top of the support seat 701. After the petrochemical high-pressure pipeline is installed into the upper end of the support seat 701, the upper end of the support seat 701 and the lower end of the C-shaped sleeve 702 are welded together. The petrochemical high-pressure pipeline is placed on the upper end of the support seat 701, and the C-shaped sleeve 702 is concentrically installed on the support seat 701. The lower end of the C-shaped sleeve 702 is welded to the upper end of the support seat 701. Thus, the support seat 701 and the C-shaped sleeve 702 provide reliable support to prevent the pipeline from shifting or vibrating during operation.

[0020] Several annular through holes 601 are provided on the outer wall of the side of the pressure plate 6 away from the pipe support 7. When the pressure plate 6 is pressed against the petrochemical high-pressure pipeline flange, the through holes 601 are reserved areas for the flange bolts and nuts, ensuring that the pressure plate 6 can contact the flange face. At this time, the opening position of the through holes 601 needs to correspond to the flange hole position to be pressed.

[0021] The linkage-type jacking structure 5 includes two rear swing arms 501 fixed on the outer periphery of the main shaft 3, a connecting block 502 bolted to the outer wall of the two rear swing arms 501 on the side away from each other, and a fisheye connecting rod 503 hinged to the lower end of the connecting block 502. One end of the fisheye connecting rod 503 is hinged to one side of the outer wall of the pressure plate 6.

[0022] A back ring 504 is fixed on the outer wall of the pressure plate 6 near the pipe support 7. A protruding foot 505 is integrally formed on one side of the outer wall of the back ring 504. One end of the protruding foot 505 and the fisheye connecting rod 503 are hinged to each other. The drive shaft of the geared motor 4 drives the main shaft 3 and the rear swing arm 501 to rotate. During the rotation of the rear swing arm 501 and the connecting block 502 around the main shaft 3, the connecting block 502 will push the protruding foot 505, the back ring 504 and the pressure plate 6 away from the pipe support 7 through the fisheye connecting rod 503, so that the flange is pressed by the linkage-type push structure 5 and the pressure plate 6.

[0023] This application embodiment is used in the initial stage of constructing a petrochemical high-pressure pipeline. Two of these fastening devices are required, one fastening device mates with one petrochemical high-pressure pipeline flange. Workers inspect all components, confirming that the pipe support 7, reduction motor 4, main shaft 3, connecting rod-type jacking structure 5, and pressure plate 6 are intact, well-lubricated, and have normal electrical connections. Then, the petrochemical high-pressure pipeline is passed through the pipe support 7, aligning the flanges of the two pipelines. It is ensured that the flange surfaces of both pipelines are flat, without obvious deformation or damage. Impurities, oil stains, and old gaskets on the flange surfaces are cleaned to ensure the sealing surfaces are clean and tidy for fastening. The operation lays the foundation. During this process, the pipe support 7 provides necessary support to ensure that the pipeline maintains the correct position during the tightening process, and to avoid affecting the sealing effect due to pipeline deformation or displacement during the operation. After the flanges of the two petrochemical high-pressure pipelines are bolted together, the reduction motor 4 is turned on. The reduction motor 4 drives the main shaft 3 to rotate. The main shaft 3 drives the connecting rod type jacking structure 5 to gradually apply pressure to the pressure plate 6. At this time, the pressure plate 6 brings the flange closer to the other flange, so that the two flanges are pressed together and tightened. After the tightening is completed, the staff conducts a comprehensive inspection of the entire connection area to confirm that all bolts are tightened in place and that the main shaft 3 is operating normally.

Claims

1. An automatic flange fastening device for petrochemical high-pressure pipelines, characterized in that: It includes two U-shaped bottom beams (1), axle load plates (2) bolted to the top of the two U-shaped bottom beams (1), and tube supports (7) installed on the top of the U-shaped bottom beams (1) on one side of the two axle load plates (2). A pressure plate (6) is provided on the side of the tube support (7) away from the axle load plate (2). A main shaft (3) is rotatably installed between the two axle load plates (2). A linkage-type jacking structure (5) for pushing the pressure plate (6) away from the tube support (7) is installed on the surface of the main shaft (3). A geared motor (4) for driving the main shaft (3) to rotate is installed on the outer wall of one side of one of the axle load plates (2).

2. The automatic flange fastening device for petrochemical high-pressure pipelines according to claim 1, characterized in that: The tube support (7) includes a support seat (701) bolted to one side of the top of the two U-shaped bottom beams (1) and a C-shaped sleeve (702) installed on the top of the support seat (701).

3. The automatic flange fastening device for petrochemical high-pressure pipelines according to claim 2, characterized in that: After the petrochemical high-pressure pipeline is installed in the upper end of the support base (701), the upper end of the support base (701) and the lower end of the C-port sleeve (702) are welded together.

4. The automatic flange fastening device for petrochemical high-pressure pipelines according to claim 1, characterized in that: The pressure plate (6) has several annular through holes (601) on the outer wall of the side away from the tube support (7).

5. The automatic flange fastening device for petrochemical high-pressure pipelines according to claim 1, characterized in that: The linkage-type jacking structure (5) includes two rear swing arms (501) fixed on the outer circumference of the main shaft (3), a connecting block (502) bolted to the outer wall of the two rear swing arms (501) on the side away from each other, and a fisheye connecting rod (503) hinged to the lower end of the connecting block (502). One end of the fisheye connecting rod (503) is hinged to one side of the outer wall of the pressure plate (6).

6. The automatic flange fastening device for petrochemical high-pressure pipelines according to claim 5, characterized in that: A back ring (504) is fixed on the outer wall of the pressure plate (6) near the tube support (7). A protruding foot (505) is integrally formed on the outer wall of the back ring (504). The protruding foot (505) and one end of the fisheye connecting rod (503) are hinged to each other.

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