A welding seat for butt-welded flanges

Abstract

This utility model discloses a welding seat for a butt-welding flange, relating to the field of flange welding technology, including a base, a flange positioning unit, and a workpiece docking unit. This utility model features a reliable flange positioning unit. Under the action of a hydraulic cylinder, the insert shaft is continuously inserted into the insert cylinder, while the outer push rod uses a chamfered bevel to continuously push the sliding plate outwards, thereby causing the four arc-shaped top plates to press tightly against the target pipe from the inside. This allows the insert cylinder to coincide with the central axis of the target pipe, enabling the flange neck to be laterally aligned with the pipe opening, facilitating precise welding. It also features a reliable workpiece docking unit. After the right end of the insert cylinder is inserted into the target pipe, the butt-welding flange is moved to the right to initially connect with the port of the target pipe. Subsequently, the electric clamp is activated to fix the position of the butt-welding flange, facilitating subsequent welding operations.

Description

Technical Field

[0001] This utility model relates to the field of flange welding technology, specifically a welding seat for butt-welding flanges. Background Technology

[0002] Weld-butt flanges are high-strength flanges with a neck that are welded to the pipeline via a round pipe transition. They are suitable for pipeline systems transporting high-pressure, high-temperature, or hazardous media. Utilizing a double-sided welding process and an optimized thinning transition structure, they effectively reduce stress concentration and offer superior sealing performance compared to slip-on flanges. They are widely used in harsh environments such as petrochemicals and power generation. To facilitate welding, auxiliary mounting bodies are often used to improve welding convenience and quality. Existing welding seats for butt-welding flanges lack reliable positioning functions, making it impossible to achieve precise alignment between the flange neck and the target pipeline. This leads to potential deviations in subsequent welding and cannot guarantee a stable connection between the pipeline and the flange over a long period. Furthermore, the lack of flange fixation hinders subsequent welding operations. Therefore, we propose a welding seat for butt-welding flanges. Utility Model Content

[0003] The technical problem this utility model aims to solve is to overcome existing defects and provide a welding seat for a butt-welding flange. This seat features a reliable flange positioning unit. Under the action of a hydraulic cylinder, the insert shaft is continuously inserted into the insert cylinder, while the outer push rod uses a chamfered bevel to continuously push the sliding plate outwards. This causes the four arc-shaped top plates to press tightly against the target pipe from the inside, aligning the insert cylinder with the central axis of the target pipe. This allows the flange neck to be laterally aligned with the pipe opening, facilitating precise welding. Furthermore, it features a reliable workpiece docking unit. The butt-welding flange to be welded is hung on the outside of the insert cylinder with its neck facing right. After the right end of the insert cylinder is inserted into the target pipe, the butt-welding flange is moved to the right to initially connect with the pipe opening. A second hydraulic cylinder drives an electric caliper to move horizontally. After the electric caliper moves to a position corresponding longitudinally to the flange disc, it is rotated to clamp the flange disc between two clamping blocks. Activating the electric caliper then fixes the position of the butt-welding flange, facilitating subsequent welding operations. This effectively solves the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a welding seat for a butt-welding flange, comprising a base, a flange positioning unit, and a workpiece docking unit; Base: It is horizontally arranged and its vertical cross-section is U-shaped. There is a fixed foot at each of the four corners of the bottom of the base. The fixed foot has bolt through holes. The control panel is installed on the front middle side of the base. Flange positioning unit: includes an inner cylinder, a sliding plate, an arc-shaped top plate, an insert shaft, push rods, a storage groove, and a welding flange. The inner cylinder is horizontally positioned above the base on the right side. Four elongated sliding plates are slidably connected to the outer side of the inner cylinder. The four sliding plates are arranged in a circumferential array. An arc-shaped top plate is fixedly connected to the outer end of each sliding plate. A chamfered bevel is formed on the left side of the inner end of the sliding plate. The insert shaft is inserted from the center of the left end face of the inner cylinder. Four push rods are fixedly connected in a circumferential array on the outer side of the insert shaft. The chamfered bevel is formed on the right side of the outer end of each push rod. Each push rod corresponds to a sliding plate. A storage groove is formed on the outer side of the inner cylinder at the position corresponding to each sliding plate. The welding flange is sleeved on the outer side of the inner cylinder, with its neck facing to the right. Workpiece docking unit: installed on the upper end and left side of the base.

[0005] The fixing feet are used to install bolts, allowing the welding seat to be installed as a whole on the matching equipment. The control panel is used to control the start and stop of various electrical devices. The welding flange to be welded is hung on the outside of the plug sleeve with the neck facing right. After the right end of the plug sleeve is inserted into the target pipe, the welding flange is moved to the right to initially connect with the port of the target pipe. Under the action of external force, the plug shaft is continuously inserted into the plug sleeve, and the outer push rod uses the chamfered bevel to continuously push the slide plate outward, so that the four arc-shaped top plates press against the inside of the target pipe. By pressing the target pipe with the four arc-shaped top plates, the central axis of the plug sleeve and the target pipe can be aligned, so that the neck of the welding flange can be aligned with the pipe opening of the target pipe, which facilitates the achievement of a precise welding effect.

[0006] Furthermore, the flange positioning unit also includes a hydraulic cylinder, a coupling, and a pin. A horizontal hydraulic cylinder is positioned on the left side of the inner cylinder. The telescopic end of the hydraulic cylinder and the insert shaft are both inserted into the coupling. The pin is inserted into the coupling from above, and the telescopic end of the hydraulic cylinder and the insert shaft are fixedly connected by the pin. The coupling connects the telescopic end of the hydraulic cylinder to the insert shaft, the pin limits and fixes the two shafts, and the hydraulic cylinder pushes the insert shaft to move to the right.

[0007] Furthermore, the workpiece docking unit includes a moving frame, a fixing ring, a support, and a hydraulic cylinder. A T-shaped moving frame is slidably connected to the upper end of the base. An Ω-shaped fixing ring is fixedly connected to the outer side of the left end of the inner cylinder. Both ends of the fixing ring are fixedly connected to the upper end of the moving frame via bolts. A support is fixedly connected to the left side of the base, and a hydraulic cylinder is fixedly mounted on the upper side of the support. The telescopic end of the hydraulic cylinder is fixedly connected to the left side of the moving frame. The moving frame is used for installing the fixing ring, which is used to fix the left end of the inner cylinder to the upper side of the moving frame. The support is used for installing the hydraulic cylinder, which is used to drive the moving frame to move laterally, thereby causing the inner cylinder on the upper side to insert into or move out of the target pipe.

[0008] Furthermore, the flange positioning unit also includes a second hydraulic cylinder and an electric clamp. Two second hydraulic cylinders are embedded in the upper end of the moving frame, with their extension ends facing horizontally to the right. An electric clamp is movably connected to the end of each cylinder. The electric clamp is laterally limited by built-in clamping blocks and can only rotate around the rod to adjust its angle. The two clamping blocks of the electric clamp are clamped to the outside of the weld flange disc. The second hydraulic cylinder drives the electric clamp to move horizontally. After the electric clamp moves to a position corresponding longitudinally to the weld flange disc, it is rotated to clamp the flange disc between the two clamping blocks. Then, the electric clamp is activated to fix the position of the weld flange.

[0009] Furthermore, the workpiece docking unit also includes guide rods and mounting blocks. Two mounting blocks are fixedly connected to the front and rear sides of the upper end of the base. A transverse guide rod is fixedly connected between two transversely opposite mounting blocks. The guide rod passes through the interior of the moving frame and maintains a slidable connection with the moving frame. The mounting blocks are used for mounting the guide rods, which can provide precise guidance for the movement of the moving frame and effectively prevent the moving frame from deviating.

[0010] Furthermore, the workpiece docking unit also includes a mounting bracket and an external clamping bracket. An L-shaped mounting bracket is fixedly connected to the left side of the movable frame, and an external clamping bracket is fixedly connected to the upper left side of the mounting bracket. The hydraulic cylinder is mounted and clamped inside the external clamping bracket. The mounting bracket is used for mounting the external clamping bracket, and the external clamping bracket is used for mounting and fixing the hydraulic cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The welding seat of this welding flange has the following advantages: 1. It has a reliable flange positioning unit. Under the action of hydraulic cylinder one, the insert shaft is continuously inserted into the insert cylinder. The outer push rod uses the chamfered bevel to push the slide plate outward continuously, so that the four arc-shaped top plates press against the target pipe from the inside. This can make the insert cylinder coincide with the central axis of the target pipe, so that the neck of the flange can be aligned laterally with the pipe opening of the target pipe, which is convenient for achieving a precise welding effect. 2. It has a reliable workpiece docking unit. The welding flange to be welded is hung on the outside of the plug sleeve with the neck facing right. After the right end of the plug sleeve is inserted into the target pipe, the welding flange is moved to the right to initially connect with the port of the target pipe. The second hydraulic cylinder is used to drive the electric clamp to move horizontally. After the electric clamp moves to the position corresponding to the longitudinal part of the welding flange disc, the electric clamp is rotated to clamp the flange disc between the two clamping blocks. Then the electric clamp is activated to fix the position of the welding flange, which facilitates the subsequent welding operation. 3. This utility model has a reliable flange positioning unit. Under the action of hydraulic cylinder one, the insert shaft is continuously inserted into the insert cylinder, and the outer push rod uses the chamfered bevel to continuously push the slide plate outward, thereby making the four arc-shaped top plates press against the target pipe from the inside. This allows the insert cylinder to coincide with the central axis of the target pipe, and the neck of the flange to be laterally aligned with the pipe opening of the target pipe, facilitating a precise welding effect. It also has a reliable workpiece docking unit. The welding flange to be welded is hung on the outside of the insert cylinder with the neck facing right. After the right end of the insert cylinder is inserted into the target pipe, the welding flange is moved to the right to initially connect with the port of the target pipe. Hydraulic cylinder two is used to drive the electric clamp to move horizontally. After the electric clamp moves to the position corresponding to the longitudinal direction of the welding flange disc, the electric clamp is rotated to clamp the flange disc between the two clamping blocks. Then the electric clamp is activated to fix the position of the welding flange, which facilitates subsequent welding operations. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure on the right side of this utility model; Figure 3 This is a schematic diagram of the internal structure of the inner insert in this utility model; Figure 4 This is a partial structural diagram of the flange positioning unit in this utility model.

[0013] In the diagram: 1. Base, 2. Fixed foot, 3. Flange positioning unit, 31. Inner cylinder, 32. Slide plate, 33. Arc-shaped top plate, 34. Insert shaft, 35. Top rod, 36. Storage groove, 37. Butt welding flange, 38. Hydraulic cylinder one, 39. Coupling, 310. Pin, 311. Hydraulic cylinder two, 312. Electric clamp, 4. Workpiece docking unit, 41. Moving frame, 42. Fixed retaining ring, 43. Support, 44. Hydraulic cylinder three, 45. Mounting bracket, 46. Outer clamp bracket, 47. Guide rod, 48. Mounting block, 5. Control panel. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4 This embodiment provides a technical solution: a welding seat for a butt-welding flange, including a base 1, a flange positioning unit 3, and a workpiece docking unit 4; Base 1: It is horizontally arranged and its vertical cross section is U-shaped. A fixed foot 2 is fixed at each of the four corners of the lower end of the base 1. The fixed foot 2 has bolt through holes. A control panel 5 is installed on the middle side of the front end of the base 1. Flange positioning unit 3: includes an inner cylinder 31, a sliding plate 32, an arc-shaped top plate 33, an insert shaft 34, a push rod 35, a storage groove 36, and a welding flange 37. The inner cylinder 31 is horizontally positioned above the base 1 on the right side. Four long strip-shaped sliding plates 32 are slidably connected to the outer side of the inner cylinder 31. The four sliding plates 32 are arranged in a circumferential array. An arc-shaped top plate 33 is fixedly connected to the outer end of each sliding plate 32. A chamfered bevel is opened on the left side of the inner end of the sliding plate 32. The insert shaft 34 is inserted from the center position of the left end face of the inner cylinder 31. Four push rods 35 are fixedly connected in a circumferential array on the outer side of the insert shaft 34. The chamfered bevel is on the right side of the outer end of the push rod 35. Each push rod 35 corresponds to a sliding plate 32. A storage groove 36 is opened on the outer side of the inner cylinder 31 at the position corresponding to each sliding plate 32. The welding flange 37 is sleeved on the outer side of the inner cylinder 31, with its neck facing to the right. Workpiece docking unit 4: installed on the upper end and left side of base 1.

[0016] Two fixing feet are used to install bolts, allowing the welding seat to be installed as a whole on the matching equipment. The control panel 5 is used to control the start and stop of various electrical devices. The welding flange 37 to be welded is hung on the outside of the insert 31 with the neck facing right. After the right end of the insert 31 is inserted into the target pipe, the welding flange 37 is moved to the right to initially connect with the port of the target pipe. Under the action of external force, the insert shaft 34 is continuously inserted into the insert 31, and the outer push rod 35 uses the chamfered bevel to continuously push the slide plate 32 outward, so that the four arc-shaped top plates 33 press against the inside of the target pipe. By pressing the target pipe with the four arc-shaped top plates 33, the insert 31 can be aligned with the central axis of the target pipe, so that the neck of the welding flange 37 can be aligned with the pipe opening of the target pipe, which facilitates the achievement of a precise welding effect.

[0017] The flange positioning unit 3 also includes a hydraulic cylinder 38, a coupling 39, and a pin 310. A horizontal hydraulic cylinder 38 is located on the left side of the inner sleeve 31. The telescopic end of the hydraulic cylinder 38 and the insert shaft 34 are both inserted into the coupling 39. The pin 310 is inserted into the coupling 39 from above, and the telescopic end of the hydraulic cylinder 38 and the insert shaft 34 are fixedly connected by the pin 310. The coupling 39 is used to connect the telescopic end of the hydraulic cylinder 38 and the insert shaft 34. The pin 310 is used to limit and fix the two shafts. The hydraulic cylinder 38 is used to push the insert shaft 34 to the right.

[0018] The workpiece docking unit 4 includes a moving frame 41, a fixing ring 42, a support 43, and a hydraulic cylinder 44. A T-shaped moving frame 41 is slidably connected to the upper end of the base 1. An Ω-shaped fixing ring 42 is fixedly connected to the outer side of the left end of the inner insert 31. Both ends of the fixing ring 42 are fixedly connected to the upper end of the moving frame 41 by bolts. A support 43 is fixedly connected to the left side of the base 1. A hydraulic cylinder 44 is mounted and fixed on the upper side of the support 43. The telescopic end of the hydraulic cylinder 44 is fixedly connected to the left side of the moving frame 41. The moving frame 41 is used for mounting the fixing ring 42, and the fixing ring 42 is used to fix the left end of the inner insert 31 to the upper side of the moving frame 41. The support 43 is used for mounting the hydraulic cylinder 44. The hydraulic cylinder 44 is used to drive the moving frame 41 to move laterally, thereby causing the inner insert 31 to insert into or move out of the target pipe.

[0019] The flange positioning unit 3 also includes a second hydraulic cylinder 311 and an electric clamp 312. Two hydraulic cylinders 311 are embedded in the upper end of the moving frame 41, with their extension ends facing horizontally to the right. An electric clamp 312 is movably connected to the end of each cylinder. The electric clamp 312 is laterally limited by built-in clamping blocks and can only rotate around a rod to adjust its angle. The two clamping blocks of the electric clamp 312 clamp the outer side of the disc portion of the weld bead flange 37. The second hydraulic cylinder 311 drives the electric clamp 312 to move horizontally. After the electric clamp 312 moves to a position corresponding longitudinally to the disc portion of the weld bead flange 37, it is rotated to clamp the flange disc between the two clamping blocks. Then, the electric clamp 312 is activated to fix the position of the weld bead flange 37.

[0020] The workpiece docking unit 4 also includes guide rods 47 and mounting blocks 48. Two mounting blocks 48 are fixedly connected to the front and rear sides of the upper end of the base 1. A transverse guide rod 47 is fixedly connected between the two transversely opposite mounting blocks 48. The guide rod 47 passes through the interior of the moving frame 41 and maintains a slidable connection with the moving frame 41. The mounting blocks 48 are used for mounting the guide rods 47. The guide rods 47 can provide a precise guiding effect for the movement of the moving frame 41 and effectively prevent the moving frame 41 from deviating.

[0021] The workpiece docking unit 4 also includes a mounting bracket 45 and an outer clamping bracket 46. An L-shaped mounting bracket 45 is fixedly connected to the left side of the movable frame 41, and an outer clamping bracket 46 is fixedly connected to the upper left side of the mounting bracket 45. The hydraulic cylinder 38 is mounted and clamped inside the outer clamping bracket 46. The mounting bracket 45 is used for mounting the outer clamping bracket 46, and the outer clamping bracket 46 is used for mounting and fixing the hydraulic cylinder 38.

[0022] The working principle of the welding seat for a butt-welding flange provided by this utility model is as follows: When using this welding seat, first, hang the butt-welding flange 37 to be welded on the outside of the insert 31 with the neck facing right. Then, start the hydraulic cylinder 44. The hydraulic cylinder 44 is used to drive the moving frame 41 to move laterally, thereby driving the right end of the upper inner insert 31 to be inserted into the target pipe. Then, the butt-welding flange 37 can be moved to the right to initially connect with the port of the target pipe. The hydraulic cylinder 311 is used to drive the electric clamp 312 to move horizontally. When the electric clamp 312 moves to the... After positioning the flange 37 in the longitudinal direction corresponding to the disc portion of the welding flange 37, rotate the electric clamp 312 to clamp the flange disc between the two clamping blocks. Then, activate the electric clamp 312 to fix the position of the welding flange 37. The retaining ring 42 is used to install and fix the left end of the inner insert 31 to the upper side of the moving frame 41. The Ω-shaped retaining ring 42 is fixedly connected to the upper end of the moving frame 41 by bolts. The mounting block 48 is used for the installation of the guide rod 47. The guide rod 47 can provide precise guidance for the movement of the moving frame 41 and effectively prevent the moving frame 41 from deviating. This welding seat has a reliable flange positioning unit 3, which can position the flange to be welded, aligning its neck with the pipe opening of the target pipe, thus facilitating a precise welding effect. The coupling 39 is used to connect the extension end of the hydraulic cylinder 38 to the insert shaft 34. The pin 310 is used to limit and fix the two shafts. The hydraulic cylinder 38 is used to push the insert shaft 34 to the right. Under the action of external force, the insert shaft 34 is continuously inserted into the insert cylinder 31. The outer push rod 35 uses the chamfered bevel to continuously push the slide plate 32 outward, thereby making the four arc-shaped top plates 33 press against the inside of the target pipe. By pressing the target pipe with the four arc-shaped top plates 33, the insert cylinder 31 can be aligned with the central axis of the target pipe, thus enabling the neck of the welding flange 37 to be aligned with the pipe opening of the target pipe, thus facilitating a precise welding effect. In addition, the mounting bracket 45 is used for the installation of the outer clamp bracket 46, which is used to install and fix the hydraulic cylinder 38; the fixing foot 2 is used to install bolts, so that the welding seat can be installed as a whole on the matching equipment; the control panel 5 is used to control the start and stop of the operation of each electrical device.

[0023] It is worth noting that the input terminals of hydraulic cylinder 38, hydraulic cylinder 311, hydraulic cylinder 44 and electric caliper 312 disclosed in the above embodiments are all electrically connected to the output terminal of an external power supply through the control panel 5. The control panel 5 controls the operation of each electrical device using methods commonly used in the prior art.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding seat for a butt-welded flange, characterized in that: It includes a base (1), a flange positioning unit (3), and a workpiece docking unit (4); Base (1): It is set horizontally and its vertical section is a U-shaped structure. A fixed foot (2) is fixed at each of the four corners of the lower end of the base (1). Bolt through holes are opened inside the fixed foot (2). A control console (5) is installed on the middle side of the front end of the base (1). Flange positioning unit (3): includes an inner insert (31), a sliding plate (32), an arc-shaped top plate (33), a shaft (34), a top rod (35), a storage groove (36), and a welding flange (37). The inner insert (31) is horizontally positioned on the right side above the base (1). Four long sliding plates (32) are slidably connected to the outer side of the inner insert (31). The four sliding plates (32) are arranged in a circumferential array. An arc-shaped top plate (33) is fixedly connected to the outer end of each sliding plate (32). The inner end of the sliding plate (32) is opened on the left side. The insert shaft (34) is inserted from the center of the left end face of the inner insert (31), and four push rods (35) are fixedly connected in a circular array on the outside of the insert shaft (34). The outer end of the push rod (35) is chamfered on the right side. Each push rod (35) corresponds to a slide plate (32). A storage groove (36) is opened on the outside of the inner insert (31) and at the position corresponding to each slide plate (32). The welding flange (37) is sleeved on the outside of the inner insert (31) and its neck is set to the right. Workpiece docking unit (4): installed on the upper end and left side of the base (1).

2. A welding stand for butt-welded flanges according to claim 1, characterized in that: The flange positioning unit (3) also includes a hydraulic cylinder (38), a coupling (39), and a pin (310). A horizontal hydraulic cylinder (38) is provided on the left side of the inner cylinder (31). The telescopic end of the hydraulic cylinder (38) and the insert shaft (34) are both inserted into the inside of the coupling (39). The pin (310) is inserted into the inside of the coupling (39) from the top. The telescopic end of the hydraulic cylinder (38) and the insert shaft (34) are fixedly connected by the pin (310).

3. A welding stand for butt-welded flanges according to claim 2, characterized in that: The workpiece docking unit (4) includes a moving frame (41), a fixed retaining ring (42), a support (43), and a hydraulic cylinder (44). The upper end of the base (1) is slidably connected to a T-shaped moving frame (41). The outer side of the left end of the inner tube (31) is fixedly connected to an Ω-shaped fixed retaining ring (42). The two ends of the fixed retaining ring (42) are fixedly connected to the upper end of the moving frame (41) by bolts. The left side of the base (1) is fixedly connected to a support (43). The upper side of the support (43) is fixedly mounted with a hydraulic cylinder (44). The telescopic end of the hydraulic cylinder (44) is fixedly connected to the left side of the moving frame (41).

4. A welding stand for butt-welded flanges according to claim 3, characterized in that: The flange positioning unit (3) also includes a hydraulic cylinder (311) and an electric caliper (312). The upper end of the moving frame (41) is fitted with two hydraulic cylinders (311) at the front and rear. The telescopic end of the hydraulic cylinder (311) is horizontally to the right, and an electric caliper (312) is movably connected at the end. The electric caliper (312) is laterally limited by the built-in clamping block and can only rotate around the rod to adjust the angle. The two clamping blocks of the electric caliper (312) are clamped on the outside of the disc part of the butt-welded flange (37).

5. A welding stand for butt-welded flanges according to claim 3, characterized in that: The workpiece docking unit (4) also includes a guide rod (47) and a mounting block (48). Two mounting blocks (48) are fixedly connected to the front and rear sides of the upper end of the base (1). A horizontal guide rod (47) is fixedly connected between the two horizontally opposite mounting blocks (48). The guide rod (47) passes through the inside of the moving frame (41) and maintains a sliding connection with the moving frame (41).

6. A welding stand for butt-welded flanges according to claim 3, characterized in that: The workpiece docking unit (4) also includes a mounting bracket (45) and an outer clamping bracket (46). An L-shaped mounting bracket (45) is fixedly connected to the left side of the movable frame (41), and an outer clamping bracket (46) is fixedly connected to the upper left side of the mounting bracket (45). The hydraulic cylinder (38) is mounted and clamped inside the outer clamping bracket (46).

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