An assembly device for a ball valve

Abstract

This utility model discloses an assembly device for ball valves, relating to the field of ball valve assembly technology. It includes a base, a connecting plate fixedly connected to the top surface of the base, a swing plate rotatably connected to the top of the connecting plate, and through slots symmetrically formed at both ends of the swing plate. A push plate is rotatably connected to each through slot, and a top plate is rotatably connected to the top of each of the two push plates. A fan-shaped groove is formed on the top surface of the top plate. This utility model drives the swing plate to swing, and through a push plate linkage mechanism, converts the swing motion into precise tilt angle adjustment of the top plate around its geometric center. This allows workers to finely adjust the pitch of heavy pipes around their axis, greatly improving the alignment accuracy and efficiency of the pipe-ball valve interface, facilitating the assembly of the ball valve and pipe. Simultaneously, the contact and separation of the friction plate with the pipe achieves locking and unlocking of the pipe rotation, making it suitable for different assembly processes such as threaded connections or welding.

Description

Technical Field

[0001] This utility model relates to the field of ball valve assembly technology, and in particular to an assembly device for ball valves. Background Technology

[0002] Ball valves, as a common fluid control component, are widely used in pipeline systems across numerous industrial sectors, including petroleum, chemical, and municipal water supply. During the installation and maintenance of ball valves, it is frequently necessary to assemble the pipes to the valve interfaces. Common assembly methods include threaded connections and welding.

[0003] For threaded connections, the threaded end of the pipe needs to be precisely aligned and screwed into the threaded interface of the ball valve. For welded connections, the pipe end and the ball valve interface need to be strictly aligned and maintained in a stable relative position before welding. Currently, on-site rough positioning is often achieved using overhead cranes combined with manual prying, followed by simple V-blocks, jacks, and other general-purpose tools for auxiliary support and fixation. This method is not only inefficient and labor-intensive, but also lacks positioning accuracy and stability, failing to meet the requirements of high-quality and high-efficiency assembly. Although some specialized tooling fixtures exist on the market, they are often single-function, typically only providing support or clamping, lacking integrated pipe posture fine-tuning to suit different assembly processes. Utility Model Content

[0004] The purpose of this utility model is to provide an assembly device for ball valves to solve the problem mentioned in the background art that existing ball valve assembly devices cannot fine-tune the pipeline, resulting in poor connection between the ball valve and the pipeline during assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an assembly device for a ball valve, comprising a base, a connecting plate fixedly connected to the top surface of the base, and a swing plate rotatably connected to the top end of the connecting plate; The swing plate has through slots on both sides of the middle part, and a push plate is rotatably connected in each through slot. The top of each push plate is rotatably connected to a top plate. The top surface of the top plate is provided with a fan-shaped groove, and multiple rollers are rotatably connected in the fan-shaped groove; The base is provided with a driving device, which is connected to one end of the swing plate and is used to drive the swing plate to swing around the top of the connecting plate. Two guide rods are also fixed to the top surface of the base. The guide rods pass through the top plate and cooperate with it. A limiting plate is fixed to the top of the guide rod. A gantry is fixedly connected to the top surface of the base, and a friction plate and an abutment plate that can move independently up and down are provided on the crossbeam of the gantry. The bottom surface of the abutment plate is provided with a fan-shaped groove, and multiple rollers are rotatably connected in the fan-shaped groove.

[0006] Preferably, the driving device includes a groove formed at one end of the swing plate, a pull rod slidably disposed in the groove, and a threaded rod rotatably connected to the base; One end of the pull rod is fixedly provided with a limiting block in the slide groove, and the other end extends out of the slide groove and is rotatably connected to a moving block; the moving block is threadedly connected to the threaded rod; the base is provided with a drive source for driving the threaded rod to rotate.

[0007] Preferably, the drive source includes a servo motor and a positioning plate fixed on the base; a worm gear is fixedly connected to the output end of the servo motor, and the worm gear is rotatably connected to the positioning plate through a rotating shaft; a worm wheel is fixedly sleeved on the threaded rod, and the worm wheel meshes with the worm gear.

[0008] Preferably, the top of both the friction plate and the abutment plate is fixedly connected to a vertical rod, and the top of the vertical rod slides through the crossbeam of the gantry and is fixedly connected to a limiting plate.

[0009] Preferably, a spring is fitted on the vertical rod corresponding to the abutment plate, and the two ends of the spring abut against the inner top surface of the gantry beam and the top surface of the abutment plate, respectively; a pull rod is also fixedly connected to the top of the abutment plate, and the top of the pull rod slides through the gantry beam and is fixedly connected to a pull ring.

[0010] Preferably, a lead screw is rotatably connected to the top of the friction plate, and the top of the lead screw passes through the gantry and is threadedly connected to the crossbeam of the gantry.

[0011] The technical effects and advantages of this utility model are as follows: This utility model drives the swing plate to swing, and through the push plate linkage mechanism, converts the swing motion into precise tilt adjustment of the top plate around its own geometric center. This allows workers to make fine adjustments to the pitch of heavy pipes around their axis, greatly improving the alignment accuracy and efficiency of the pipe and ball valve interface, facilitating the assembly of the ball valve and the pipe. At the same time, the contact and separation between the friction plate and the pipe enables the locking and unlocking of the pipe rotation, making it suitable for different assembly processes such as threaded connections or welding. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the gantry structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the swing plate part of this utility model.

[0015] Figure 4for Figure 1 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Base; 2. Connecting plate; 3. Swing plate; 31. Through groove; 32. Push plate; 4. Top plate; 41. Roller 1; 42. Guide rod; 5. Mast; 51. Friction plate; 52. Abutment plate; 521. Roller 2; 53. Vertical rod; 531. Spring; 54. Pull rod; 55. Lead screw; 6. Pull rod; 61. Moving block; 62. Threaded rod; 63. Limit block; 7. Servo motor; 71. Worm gear; 72. Worm; 73. Positioning plate. 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. 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.

[0018] This utility model provides, for example Figure 1-3 An assembly device for a ball valve is shown, including a base 1. A connecting plate 2 is fixedly connected to the top surface of the base 1, and a swing plate 3 is rotatably connected to the top of the connecting plate 2; The swing plate 3 has through slots 31 on both sides of the middle part, and each through slot 31 is rotatably connected to a push plate 32. The top of each push plate 32 is rotatably connected to a top plate 4. The top surface of the top plate 4 is provided with a fan-shaped groove, and multiple rollers 41 are rotatably connected in the fan-shaped groove; The base 1 is equipped with a driving device, which is connected to one end of the swing plate 3 for driving the swing plate 3 to swing around the top of the connecting plate 2. Two guide rods 42 are also fixed on the top surface of the base 1. The guide rods 42 pass through the top plate 4 and cooperate with it. A limiting plate is fixed at the top of the guide rods 42. A gantry 5 is fixedly connected to the top surface of the base 1. A friction plate 51 and an abutment plate 52 that can move independently up and down are provided on the crossbeam of the gantry 5. The bottom surface of the abutment plate 52 is provided with a fan-shaped groove, and multiple rollers 521 are rotatably connected in the fan-shaped groove; The base 1 serves as the foundation of the entire device, and the connecting plate 2, as the core support component, is vertically fixed to the base 1. Its top end is hinged to the middle of the swing plate 3 via a pivot, allowing the swing plate 3 to swing precisely up and down around the pivot like a lever. Symmetrically machined through slots 31 are formed at both ends of the swing plate 3, within which push plates 32 are hinged via pins. The top ends of the two push plates 32 are then hinged to the bottom surface of the top plate 4 via two additional pins, thus forming a stable yet flexible spatial linkage mechanism between the top plate 4 and the swing plate 3. The top surface of the top plate 4 is machined into a concave fan-shaped curved surface. Multiple freely rotatable rollers 41 are installed side-by-side in the fan-shaped grooves on this curved surface, forming a low-friction pipe support surface. The power output point of the drive device acts on one end of the swing plate 3. To constrain the movement trajectory of the top plate 4 and withstand possible lateral forces, at least one vertical guide rod 42 is fixed on the base 1. This guide rod 42 passes through a corresponding aperture on the top plate 4 and is secured at its top by a limiting plate to prevent the top plate 4 from detaching. At the rear of the base 1, a gantry 5 is fixedly installed. On its crossbeam, i.e., the horizontal portion at the top, friction plates 51 and abutment plates 52 are arranged in parallel. Both can move independently in the vertical direction via their respective lifting mechanisms. The bottom surface of the abutment plate 52 is also machined with a fan-shaped groove containing rollers 521, corresponding vertically to rollers 41 on the top plate 4, forming a "movable clamp." By driving the swing plate 3 to swing, and through the linkage mechanism of the push plate 32, the swing motion is converted into precise tilt adjustment of the top plate 4 around its own geometric center. This allows the operator to make fine adjustments to the pitch of the heavy pipe around its axis, greatly improving the alignment accuracy and efficiency of the pipe and ball valve interface, and facilitating the assembly of the ball valve and the pipe; At the same time, when it is necessary to weld the pipe to the valve, the friction plate 51 moves down to squeeze the pipe to prevent the pipe from rotating during welding. When a pipe needs to be threaded to a valve, the friction plate 51 rises and separates from the pipe, allowing the pipe to rotate for easy connection to the valve.

[0019] like Figure 1 and Figure 3 As shown, the driving device includes a groove opened at one end of the swing plate 3, a pull rod 6 slidably disposed in the groove, and a threaded rod 62 rotatably connected to the base 1. A limiting block 63 is fixedly provided at one end of the pull rod 6 located in the slide groove, and the other end extends out of the slide groove and is rotatably connected to a moving block 61; the moving block 61 is threadedly connected to the threaded rod 62; the base 1 is provided with a drive source for driving the threaded rod 62 to rotate. At the end of the swing plate 3 that needs to be driven, a long, narrow groove is machined. One end of a rod-shaped pull rod 6 is inserted into this groove and can slide freely along the length of the groove. At this end, a limit block 63 is fixed, its size being larger than the width of the groove, to prevent the pull rod 6 from completely disengaging from the groove. The other end of the pull rod 6 is rotatably connected to the moving block 61 via a spherical bearing or a simple pin. The moving block 61 has a nut embedded inside, forming a precise helical transmission pair with the threaded rod 62 horizontally mounted on the base 1. When the drive source drives the threaded rod 62 to rotate, the moving block 61 makes a precise linear movement along the axial direction of the threaded rod 62. During the swinging process, the instantaneous relative position and the angle of the connection between the swing plate 3 and the moving block 61 constantly change. This structure can perfectly absorb and compensate for this change, completely avoiding the problems of mechanism jamming or excessive wear of components that are inevitably caused by rigid connections, and ensuring smooth drive.

[0020] like Figure 1 As shown, the driving source includes a servo motor 7 and a positioning plate 73 fixed on the base 1; a worm gear 72 is fixedly connected to the output end of the servo motor 7, and the worm gear 72 is rotatably connected to the positioning plate 73 through a rotating shaft; a worm wheel 71 is fixedly sleeved on the threaded rod 62, and the worm wheel 71 and the worm gear 72 mesh with each other. A servo motor 7 is used as the power source, and it is fixed to the base 1 via a motor mount. The output shaft of the servo motor 7 is directly connected to the shaft of the worm gear 72, and the other end of the shaft is supported by a bearing seat on the positioning plate 73 to ensure smooth rotation. The worm wheel 71 is tightly fitted onto the threaded rod 62 and meshes perpendicularly with the worm gear 72. When the motor stops, the transmission chain is locked, and the top plate 4 and the pipe load on it cannot drive the system to reverse on their own, ensuring the stability of the pipe position during assembly.

[0021] like Figure 2 As shown, the top of the friction plate 51 and the abutment plate 52 are both fixedly connected with vertical rods 53. The top of the vertical rods 53 slides through the crossbeam of the gantry 5 and is fixedly connected with a limit plate. Vertical rods 53 are vertically welded to the top of the friction plate 51 and the abutment plate 52, respectively. These vertical rods 53 pass upward through pre-machined smooth guide holes on the crossbeam of the gantry 5. At the top of the vertical rod 53, a limiting plate with a diameter larger than the guide hole is fixed by thread or welding to prevent the vertical rod 53 from falling out of the guide hole due to its own weight or the force of the spring 531.

[0022] like Figure 2 As shown, a spring 531 is fitted on the vertical rod 53 corresponding to the abutment plate 52. The two ends of the spring 531 abut against the inner top surface of the crossbeam of the gantry 5 and the top surface of the abutment plate 52, respectively. A pull rod 54 is also fixedly connected to the top of the abutment plate 52. The top of the pull rod 54 slides through the crossbeam of the gantry 5 and is fixedly connected to a pull ring. A spring 531 is fitted onto the vertical rod 53 corresponding to the abutment plate 52. The upper end of the spring 531 rests against the inner top surface of the lower surface of the crossbeam of the gantry 5, and the lower end presses directly against the top surface of the abutment plate 52. In addition, a pull rod 54 is fixedly connected to the abutment plate 52. The pull rod 54 also passes through another guide hole on the crossbeam, and its diameter is slightly larger than that of the pull rod 54 to reduce friction. A pull ring is installed at the top for easy manual gripping. Spring 531 provides controllable, adaptive downward pressure. In threaded connection scenarios, it ensures that roller 521 remains in close contact with the pipe end face, providing sufficient axial resistance to counteract tightening torque, while this force is flexible, allowing the pipe to rotate after overcoming minimal rolling friction.

[0023] like Figure 2 As shown, a lead screw 55 is rotatably connected to the top of the friction plate 51, and the top of the lead screw 55 passes through the gantry 5 and is threadedly connected to the crossbeam of the gantry 5. The top of the friction plate 51 is rotatably connected to the lower end of the lead screw 55 via a bushing. The shaft of the lead screw 55 is screwed upward into a specially machined threaded hole on the crossbeam of the frame 5. By rotating the handwheel at the top of the lead screw 55 or using a wrench, the lead screw 55 itself can be driven to rise or fall during rotation, thereby driving the friction plate 51 rotatably connected to it to perform precise raising and lowering. In welding mode, by tightening the screw 55, a huge downward pressure can be applied to the friction plate 51, which rigidly presses the pipe onto the top plate 4, forming a firm "fixed" structure. This effectively resists any slight displacement caused by thermal stress, vibration, etc. during the welding process, fundamentally ensuring the quality of the welded joint.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An assembly device for a ball valve, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly connected to a connecting plate (2), and the top end of the connecting plate (2) is rotatably connected to a swing plate (3). The swing plate (3) has through slots (31) on both sides of the middle part. Each through slot (31) is rotatably connected to a push plate (32), and the top of each push plate (32) is rotatably connected to a top plate (4). The top surface of the top plate (4) is provided with a fan-shaped groove, and multiple rollers (41) are rotatably connected in the fan-shaped groove. The base (1) is provided with a driving device, which is connected to one end of the swing plate (3) for driving the swing plate (3) to swing around the top of the connecting plate (2); The top surface of the base (1) is also fixed with two guide rods (42), which pass through the top plate (4) and cooperate with it. The top end of the guide rod (42) is fixed with a limiting plate. The top surface of the base (1) is fixedly connected to a gantry (5), and the crossbeam of the gantry (5) is provided with a friction plate (51) and an abutment plate (52) that can move independently up and down. The bottom surface of the abutment plate (52) is provided with a fan-shaped groove, and multiple rollers (521) are rotatably connected in the fan-shaped groove.

2. A fitting device for a ball valve according to claim 1, characterized in that: The driving device includes a groove at one end of the swing plate (3), a pull rod (6) slidably disposed in the groove, and a threaded rod (62) rotatably connected to the base (1). The pull rod (6) is fixedly provided with a limiting block (63) at one end in the slide groove, and its other end extends out of the slide groove and is rotatably connected to a moving block (61); the moving block (61) is threadedly connected to the threaded rod (62); the base (1) is provided with a drive source for driving the threaded rod (62) to rotate.

3. A fitting device for a ball valve according to claim 2, characterized in that: The drive source includes a servo motor (7) and a positioning plate (73) fixed on the base (1); the output end of the servo motor (7) is fixedly connected to a worm (72), and the worm (72) is rotatably connected to the positioning plate (73) through a rotating shaft; a worm wheel (71) is fixedly sleeved on the threaded rod (62), and the worm wheel (71) meshes with the worm (72).

4. The assembly device for a ball valve according to claim 1, characterized in that: The friction plate (51) and the abutment plate (52) are both fixedly connected to the top of a vertical rod (53). The top of the vertical rod (53) slides through the crossbeam of the gantry (5) and is fixedly connected to a limiting plate.

5. The assembly for a ball valve of claim 1, wherein: A spring (531) is fitted on the vertical rod (53) corresponding to the abutment plate (52). The two ends of the spring (531) abut against the inner top surface of the crossbeam of the gantry (5) and the top surface of the abutment plate (52), respectively. A pull rod (54) is also fixedly connected to the top of the abutment plate (52). The top of the pull rod (54) slides through the crossbeam of the gantry (5) and is fixedly connected to a pull ring.

6. The assembly device for a ball valve according to claim 1, characterized in that: The friction plate (51) is rotatably connected to a lead screw (55), the top end of which passes through the gantry (5) and is threadedly connected to the crossbeam of the gantry (5).

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