Adjustable coupling and its processing technology

Abstract

The application discloses an adjustable joint and a processing technology thereof, and relates to the field of pipeline connecting pieces. The joint comprises a connecting nut and a connecting pipe. The connecting pipe is fixedly connected with the connecting nut through screw threads. The connecting pipe is fixedly provided with a bellows. The end of the bellows away from the connecting pipe is fixedly provided with a plug. The plug and the connecting pipe are coaxially provided with rotating barrels. The rotating barrels are sleeved with straight barrels. The straight barrels are slidably connected with the rotating barrels along the axial direction. A moving piece is arranged between the rotating barrels and the straight barrels. The moving piece is used for driving the straight barrels and the rotating barrels to relatively move along the axial direction. Two rotating blocks are connected with the sides of the two straight barrels close to each other. The two rotating blocks are hingedly connected with each other. In one working state of the rotating blocks, the hinge axes between the two rotating blocks are perpendicular to the axes of the straight barrels. Locking pieces are arranged between the two rotating blocks. The locking pieces lock the two rotating blocks when working. The application has the advantages that the bending angle of the joint can be conveniently adjusted, and the connection stability of the joint after installation is improved.

Description

Technical Field

[0001] The invention relates to the field of pipeline connectors, in particular to an adjustable flexible joint and a processing technology thereof. Background Art

[0002] A union is a removable connector used for connecting pipes. It's primarily used for connecting pipes up to DN50, allowing for quick disassembly and installation when needed. Common union types include straight and curved types, and the correct union should be selected based on the specific installation conditions.

[0003] For related technology, reference may be made to a flexible joint disclosed in a Chinese patent with announcement number CN222277750U, which includes a nut and a joint. One end of the outer peripheral wall of the joint is provided with an external thread, which is connected to the pipe through the external thread. The other end of the outer peripheral wall of the joint is provided with a circle of radial protrusions, which are inserted into the socket hole provided with the nut through the joint, and the radial protrusions are abutted and limited against the inner end surface of the socket hole; the inner peripheral wall of the joint is provided with a lever protrusion for cooperating with a special tool to lever the joint; by providing a lever protrusion on the inner peripheral wall of the joint, a threaded connection between the joint and the pipe is achieved through a special tool, and the anti-theft performance after installation is more prominent. At the same time, by providing a lever protrusion on the inner peripheral wall of the joint, processing is more convenient and material utilization is also higher.

[0004] Regarding the above-mentioned related technologies, in actual use, it is difficult to fully adapt the installation position of the pipe and the installation position of the joint. For example, in the installation of a water heater, the pipe usually needs to be close to the wall or the ground, and the water outlet and water inlet of the water heater are often in the middle position. Therefore, when connecting the pipe and the joint on the water heater, the pipe needs to be cut or spliced, and connected using an elbow joint. However, since the bending angle of the elbow joint is mostly a right angle, the angle is difficult to adjust. Therefore, when cutting and splicing the pipe, it is necessary to ensure that the cutting position and splicing length of the pipe are accurate enough, and the installation is difficult. If an error occurs during the splicing process of the pipe, it will cause the pipe to bend and deform, thereby causing stress at the joint connection. Under long-term working conditions, it will affect the installation stability of the joint. Summary of the Invention

[0005] In order to facilitate the adjustment of the bending angle of the joint and improve the connection stability of the joint after installation, the present application provides an adjustable joint and a processing technology thereof.

[0006] This application provides an adjustable joint, which adopts the following technical solution:

[0007] The cam is connected to the flange of the pipe by a screw thread and is connected to the flange of the pipe by a screw thread. The cam is connected to the pipe by a screw thread and is connected to the flange of the pipe by a screw thread. The cam is connected to the pipe by a screw thread and is connected to the pipe by a screw thread. The cam is connected to the pipe by a screw thread and is connected to the pipe by a screw thread.

[0008] By adopting the above technical solution, the connecting tube is connected to the corresponding union body using a connecting nut, and then connected to the corresponding pipe via a plug. The pipe and the union body are connected via the connecting tube and bellows. In the initial state, the two straight cylinders are coaxially arranged. When the union body and the pipe are at an angle, the straight cylinder is directly rotated. Under the action of the two rotating blocks, the two straight cylinders drive the connecting tube and the plug to rotate. During this process, the bellows rotate with the straight cylinders, thereby facilitating the adjustment of the angle between the plug and the connecting tube. When the bending angle of the bellows meets the required bending angle, the two rotating blocks are locked by the locking member. The straight cylinder is now in a fixed position. When water flows through the bellows, the straight cylinder limits the swaying of the bellows, improving the flow stability of the water flow. Under the action of the rotating block, the tendency of the two straight cylinders to move closer to each other is restricted. At this time, the moving member drives the two rotating cylinders closer or farther, thereby facilitating the adjustment of the distance between the connecting tube and the plug and the rotating block, further increasing the connection range, facilitating the adjustment of the union, and improving the connection stability of the union after installation.

[0009] Optionally, the connecting tube includes an inner tube, an outer tube and a metal outer tube, a retaining ring is coaxially fixed to one end of the inner side of the connecting nut along the axial direction, and a limiting ring adapted to the retaining ring is fixedly connected to one end of the inner tube along the axial direction. The inner tube passes through the connecting nut and the retaining ring in sequence, and the limiting ring fits the retaining ring. The metal outer tube is sleeved on the outside of the inner tube, and one end of the metal outer tube passes through the retaining ring and contacts with the limiting ring. The outer tube is secondary molded on the end of the inner tube away from the connecting nut by injection molding, and is covered and fixed to the outside of the metal outer tube. The bellows is fixedly connected and communicated with the end of the outer tube away from the connecting nut.

[0010] By adopting this technical solution, the connecting nut restrains the limiting ring via the retaining ring, thereby reducing the probability of the connecting nut detaching from the inner tube after the outer tube is formed. After the outer tube is formed, the connecting surface between the metal outer tube and the inner tube is shielded, thereby improving the installation stability of the metal outer tube and enhancing the sealing between the connecting nut and the inner tube. The metal outer tube protects the connecting tube from the outside, improving the overall strength of the inner tube.

[0011] Optionally, the end of the bellows along the length direction is fixedly connected to a mounting tube, a convex ring is coaxially fixed to the end of the mounting tube away from the bellows, the outer diameter of the convex ring is larger than the outer diameter of the mounting tube, an insert tube is fixed to the end of the outer tube away from the bolt, the convex ring and the mounting tube are both sleeved on the outside of the insert tube and fit with the outer circle of the insert tube, a mounting ring is coaxially fixed to the outer circle of the outer tube, the mounting ring is located on the outside of the convex ring and the mounting tube, and the mounting ring fits with both the convex ring and the mounting tube.

[0012] By adopting the above technical solution, the outer tube is preliminarily connected and positioned with the mounting tube through the insert tube, the corrugated tube is connected with the outer tube through the mounting tube, and when the mounting ring is formed on the outside of the outer tube, the mounting tube is fixedly connected with the outer tube through the mounting ring. At this time, the mounting ring limits the mounting tube through the convex ring, thereby improving the connection stability and air tightness between the mounting tube and the outer tube.

[0013] Optionally, the rotating cylinder includes a cylindrical portion, two arc-shaped plates and a plurality of screws. An annular groove is opened circumferentially on the outer circle of the mounting ring. The inner diameter of the cylindrical portion is not less than the maximum outer diameter of the outer tube. The cylindrical portion is sleeved on the outside of the straight cylinder and fits with the outer edge of the straight cylinder. The two arc-shaped plates are both located in the annular groove and fit with the inner wall of the annular groove. The cylindrical portion contacts one end of the arc-shaped plate away from the connecting nut. A plurality of screws are arranged along the length direction of the arc-shaped plate, and the screws pass through the arc-shaped plate and are threadedly connected to the cylindrical portion.

[0014] By adopting this technical solution, the mounting ring limits the axial displacement of the two curved plates through annular grooves. The curved plates are connected to the cylindrical portion via screws, so that movement of the cylindrical portion drives the corresponding mounting ring. Both the curved plates and the cylindrical portion are removable, making them easy to repair and replace.

[0015] Optionally, the rotating block includes a fixed part and a movable part, the fixed part is fixedly connected to the corresponding straight cylinder, the movable part has a through hole opened at one end along the length direction, the fixed part is fixed with a locking screw, the locking screw passes through the through hole and is rotatably connected to the movable part along the axis of the through hole, and the locking screw is provided with a first locking nut for positioning the movable part, and the ends of the two movable parts close to each other are provided with the same rotating rod, the rotating rod passes through the two movable parts in sequence and is rotatably connected to both movable parts, and the locking piece is used to limit the relative movement of the two movable parts around the rotating rod.

[0016] By adopting the above technical solution, in the initial state, the two straight tubes are coaxial, and the fixed portion limits the movable portion through the engagement of the locking screw and the through-hole. At this time, the first locking nut locks the movement between the movable portion and the fixed portion. When it is necessary to form an angle between the two straight tubes, the locking member limiting the movable portion is released, allowing the two straight tubes to rotate about the rotating rod. When it is necessary to make the two straight tubes non-coaxial and parallel, the locking member remains locked, the first locking nut is loosened, and the movable portion is rotated about the locking screw, causing the two straight tubes to offset radially. This is suitable for working environments where the pipes and joints are parallel but staggered, further improving installation convenience.

[0017] Optionally, the locking screw includes a smooth rod portion and a threaded portion, the smooth rod portion is fixedly connected to the fixed portion, the threaded portion is coaxially fixed to the end of the smooth rod portion facing away from the fixed portion, the first locking nut is threadedly connected to the threaded portion, the smooth rod portion is located on the inner side of the through hole and fits against the inner wall of the through hole, a straight groove is opened on the outer circle of the threaded portion along the axial direction, a first anti-slip plate is provided between the movable portion and the first locking nut, the first anti-slip plate is fixed with a limiting plate, the limiting plate is located in the straight groove and is slidably connected to the threaded portion along the length direction of the straight groove.

[0018] By adopting the above technical solution, the locking bolt limits the movable part through the cooperation between the smooth rod part and the through hole, and the threaded part limits the limiting plate through the straight groove, thereby limiting the rotation of the first anti-slip plate around the threaded part. When the first locking nut is tightened, the first locking nut pushes the first anti-slip plate to fit with the movable part, so that the fixed part and the first anti-slip plate cooperate to clamp and position the movable part. The rotation of the first anti-slip plate around the circumferential direction is restricted, which is beneficial to reduce the probability of driving the first locking nut to rotate when the movable part is offset, and is beneficial to improving the installation stability of the first locking nut.

[0019] Optionally, the locking member includes a locking bolt 1 and a locking bolt 2. Among the two movable parts, any movable part is set as a mounting part, and the other movable part is set as a plug-in part. The mounting part is provided with a mounting groove, and the plug-in part is located in the mounting groove and fits against the inner wall of the mounting groove. The locking bolt 1 and the locking bolt are respectively located on both sides of the plug-in part and are arranged opposite to each other, and the locking bolt 1 and the locking bolt 2 both pass through the mounting part and are threadedly connected to the mounting part. The end face of the plug-in part facing the locking bolt 1 is flat, and a plurality of positioning grooves are provided at one end of the plug-in part close to the locking bolt 2 with the rotating rod as the center. The locking bolt 2 is inserted into any positioning groove and contacts the inner wall of the positioning groove.

[0020] By adopting the technical scheme, the installation part limits the plug-in part through the installation slot, the locking bolt one limits the movement of the plug-in part after penetrating the installation part and abutting against the plug-in part, at this time, the included angle between the two straight cylinders can be any value within the rotation angle range of the movable part; the second locking bolt also limits the movement of the plug-in part after being inserted into the positioning slot, at this time, the included angle between the two straight cylinders is at a preset value, the locking bolt one and the locking bolt two cooperate, thereby meeting various different working requirements and improving the use convenience.

[0021] Optionally, the moving piece comprises a moving screw rod, a second locking nut and a second anti-escape sheet, the outer side of the rotating drum is fixedly connected with a connecting block, the moving screw rod penetrates through the connecting block and is threadedly connected with the connecting block, a straight rod is coaxially fixed to one end of the moving screw rod close to the fixed block, the diameter of the straight rod is smaller than that of the moving screw rod, the straight rod penetrates through the fixed part and is rotationally connected with the fixed part, the second locking nut is threadedly connected to one end of the straight rod away from the moving screw rod, and the second anti-escape sheet is located between the second locking nut and the fixed part, the straight rod drives the second anti-escape sheet to rotate synchronously when the straight rod rotates.

[0022] By adopting the technical scheme, the diameter of the straight rod is smaller than that of the moving screw rod, when the second locking nut is tightened, the end of the locking screw rod close to the straight rod abuts against the fixed part, thereby enabling the fixed part to support the rotation of the locking screw rod around the axis of the locking screw rod. The second anti-escape sheet is beneficial to limiting the relative movement between the second locking nut and the straight rod, thereby improving the installation stability of the second locking bolt. When the moving screw rod rotates, the moving screw rod drives the connecting block to move, thereby driving the rotating drum to move around the axis of the rotating drum through the connecting block, which is convenient for adjusting the relative position of the rotating drum and the straight cylinder and is suitable for different installation conditions.

[0023] In a second aspect, the application provides a machining process for an adjustable loose joint, comprising the following steps:

[0024] Preparation: prepare connecting nuts, corrugated pipes, rotating drums and straight cylinder raw materials;

[0025] Assembly I: wrap both straight cylinders outside the corrugated pipe, so that the two rotating blocks remain hinged;

[0026] Connection I: install the connecting nut at one end of the connecting pipe by means of secondary injection molding;

[0027] Connection II: install and fix the corrugated pipe at one end of the connecting pipe away from the connecting nut:

[0028] Connection III: form and connect the plug to the end of the corrugated pipe away from the connecting pipe by injection molding;

[0029] Assembly II: wrap the rotating drum outside the corresponding straight cylinder, so that the rotating drum is rotationally connected with the corresponding connecting pipe or plug, and the rotating drum is connected with the corresponding straight cylinder through the moving piece;

[0030] Testing: Rotate the two straight cylinders to bend the bellows, lock the two rotating blocks with the locking parts, and test the locking stability.

[0031] The connection step also includes:

[0032] One-shot molding: the inner tube is manufactured by injection molding;

[0033] Installation: Pass the inner tube through the connecting nut and the metal outer tube in sequence until the limit ring fits the retaining ring;

[0034] Secondary molding: The outer tube is molded on the outside of the inner tube and the metal outer tube by injection molding.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. Use the connecting nut to connect the connecting pipe to the corresponding flexible joint, and connect it to the corresponding pipe through the plug, and connect the pipe to the flexible joint through the connecting pipe and the bellows. In the initial state, the two straight cylinders are coaxially arranged. When there is an angle between the flexible joint position of the pipe and the flexible joint, directly rotate the straight cylinder. Under the connection of the two rotating blocks, the two straight cylinders drive the connecting pipe and the plug to flip. During this process, the bellows rotates with the straight cylinder, which makes it easier to adjust the angle between the plug and the connecting pipe. When the bending angle of the bellows meets the requirements, the two rotating blocks are locked by the locking piece. At this time, the straight cylinder is in a positioned state. When water flows through the bellows, the straight cylinder limits the shaking of the bellows, thereby improving the flow stability of the water flow. Under the connection of the rotating block, the tendency of the two straight cylinders to approach each other is restricted. At this time, the two rotating cylinders are driven closer or farther away from each other by the moving piece, thereby facilitating the adjustment of the distance between the connecting pipe and the plug to the rotating block, further increasing the connection range, facilitating the adjustment of the flexible joint, and helping to improve the connection stability of the flexible joint after installation;

[0037] 2. The connecting nut restricts the retaining ring through the retaining ring, thereby reducing the probability of the connecting nut detaching from the inner tube after the outer tube is formed. After the outer tube is formed, the connecting surface between the metal outer tube and the inner tube is blocked, which helps to improve the installation stability of the metal outer tube and enhance the sealing between the connecting nut and the inner tube. The metal outer tube protects the connecting tube from the outside, improving the overall strength of the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0039] Figure 2 This is a schematic diagram intended to highlight the connection structure between the straight tube and the cylindrical part.

[0040] Figure 3 yes Figure 2 Enlarged view of part A.

[0041] Figure 4 is a schematic view intended to highlight the connection structure of the mounting portion and the plug-in portion.

[0042] BRIEF DESCRIPTION OF DRAWINGS: 1, connecting nut; 11, baffle ring; 2, connecting pipe; 21, inner pipe; 211, limiting ring; 22, outer pipe; 221, plug pipe; 222, mounting ring; 223, annular groove; 23, metal outer pipe; 231, extension ring; 3, corrugated pipe; 31, mounting pipe; 32, convex ring; 4, plug; 41, inner ring; 42, outer ring; 5, rotating cylinder; 51, cylindrical portion; 52, arc plate; 53, screw; 54, connecting block; 6, straight cylinder; 611, fixed portion; 612, mounting portion; 613, plug-in portion; 614, through hole; 615, mounting groove; 616, positioning groove; 62, locking screw; 621, light rod portion; 622, threaded portion; 623, straight groove; 63, first locking nut; 631, first anti-drop piece; 632, limiting piece; 64, rotating rod; 71, moving screw; 711, straight rod; 72, second locking nut; 73, second anti-drop piece; 81, locking bolt one; 82, locking bolt two. DETAILED DESCRIPTION

[0043] The application will be further described in detail below with reference to all the accompanying drawings.

[0044] The application discloses an adjustable loose joint and a processing technology thereof.

[0045] Embodiment:

[0046] Referring to Figure 1 and Figure 2 , an adjustable loose joint sequentially comprises a connecting nut 1, a connecting pipe 2, a corrugated pipe 3 and a plug 4. The connecting nut 1 is fixedly connected with a baffle ring 11 at the inner side, and the baffle ring 11 is located at one end of the connecting nut 1 along the axial direction. The connecting pipe 2 comprises an inner pipe 21, an outer pipe 22 and a metal outer pipe 23, and the inner pipe 21 passes through the connecting nut 1 and the baffle ring 11. The inner pipe 21 is fixedly connected with a limiting ring 211 at one end along the axial direction, and the limiting ring 211 is in abutment with the baffle ring 11, thereby preventing the connecting nut 1 from falling off the inner pipe 21.

[0047] Referring to Figure 1 and Figure 2The metal outer tube 23 is sleeved on the outside of the inner tube 21, and the end of the metal outer tube 23 close to the limit ring 211 is located on the inside of the retaining ring 11 and fits with the inner wall of the retaining ring 11. The outer tube 22 is made of the same material as the inner tube 21, both made of a plastic material, such as polyethylene, and the outer tube 22 is directly formed on the end of the inner tube 21 away from the connecting nut 1 by injection molding. During the molding process of the outer tube 22, it is solidified into one piece with the inner tube 21. The end of the metal outer tube 23 away from the connecting nut 1 is located on the inside of the outer tube 22 and fits with the inner tube 21. The outer tube 22 is connected to the metal outer tube 23 during molding.

[0048] Reference Figure 1 and Figure 2 An extension ring 231 is fixedly provided at one end of the metal outer tube 23 away from the connecting nut 1. The extension ring 231 protrudes in a direction away from the axis of the metal outer tube 23. The extension ring 231 is located inside the outer tube 22 and is fixedly connected to the outer tube 22, which helps to improve the connection strength between the metal outer tube 23 and the outer tube 22 and enhance the installation stability of the metal outer tube 23. The metal outer tube 23 protects the connection between the inner tube 21 and the connecting nut 1, thereby improving the connection strength between the connecting nut 1 and the inner tube 21 and improving the sealing effect between the connecting nut 1 and the inner tube 21. When connecting the flexible joint, the connecting nut 1 is threadedly connected to the flexible joint of the flexible joint body, and a sealing gasket is provided on the inside of the connecting nut 1, which helps to improve the connection sealing effect between the connecting nut 1 and the flexible joint body.

[0049] Reference Figure 1 and Figure 2 The bellows 3 is made of a metal material and has the properties of being bendable and retractable. The bellows 3 is a prior art and will not be described in detail here. The bellows 3 is located at the end of the outer tube 22 away from the connecting nut 1, and both ends of the bellows 3 are fixedly connected to a mounting tube 31. The end of the outer tube 22 away from the connecting nut 1 is fixed with a plug 221. The mounting tube 31 is sleeved on the outside of the plug 221 and fits with the plug 221. A mounting ring 222 is provided on the outside of the plug 221. The mounting ring 222 is located on the outside of the mounting tube 31 and is integrally formed with the plug 221 by injection molding. A convex ring 32 is coaxially fixed to the end of the mounting tube 31 away from the bellows 3. The convex ring 32 is located inside the mounting ring 222 and fits with the mounting ring 222. When the mounting ring 222 is formed, the convex ring 32 limits the relative displacement between the mounting tube 31 and the plug 221 along the axial direction, which is beneficial to improving the connection stability and sealing between the mounting tube 31 and the outer tube 22.

[0050] Reference Figure 1 and Figure 2The plug 4 is located at the end of the bellows 3 away from the connecting tube 2 and is hollow. The plug 4 includes an inner ring 41 and an outer ring 42. The inner ring 41 is inserted into the inner side of the mounting tube 31 of the bellows 3, and the outer ring 42 is also formed outside the inner ring 41 by injection molding. After molding, the outer ring 42 is bonded to the inner ring 41 to form a whole, thereby connecting the plug 4 to the mounting tube 31. The end of the inner ring 41 away from the bellows 3 is connected to the pipe to be connected to the union.

[0051] Reference Figure 1 and Figure 2 Two straight cylinders 6 are sleeved on the outside of the bellows 3, and a rotating cylinder 5 is sleeved on the outside of each straight cylinder 6. The rotating cylinder 5 includes a cylindrical portion 51, two curved plates 52, and multiple screws 53. The inner diameter of the cylindrical portion 51 is larger than the maximum outer diameter of the connecting pipe 2, making it easier to fit the cylindrical portion 51 on the outside of the corresponding straight cylinder 6. The mounting ring 222 is circumferentially provided with an annular groove 223 that adapts to the curved plates 52. When the curved plates 52 are inserted into the corresponding annular groove 223, they abut against the inner wall of the annular groove 223. At this time, one side of the curved plate 52 is aligned with the axial end of the cylindrical portion 51. The screws 53 are located on the side of the curved plate 52 facing away from the cylindrical portion 51, and all screws 53 pass through the curved plate 52 and are threadedly connected to the corresponding cylindrical portion 51. At this time, the mounting ring 222 limits the curved plate 52 through the annular groove 223, thereby limiting the movement of the cylindrical portion 51 along the axial direction. The outer side of the plug 4 is provided with a similar annular groove 223 , thereby facilitating the positioning of another set of rotating drums 5 .

[0052] Reference Figure 2 and Figure 3 The two straight cylinders 6 are each provided with a rotating block on the side close to each other. The rotating block includes a fixed portion 611 and a movable portion. The fixed portion 611 is fixedly connected to the straight cylinder 6, and the fixed portion 611 is fixedly connected to the straight cylinder 6. The movable portion is located on the side of the fixed portion 611 away from the straight cylinder 6. A locking screw 62 is fixed on the end of the fixed portion 611 away from the straight cylinder 6. The locking screw 62 is arranged perpendicular to the axis of the straight cylinder 6. The locking screw 62 includes a smooth rod portion 621 and a threaded portion 622. The smooth rod portion 621 is fixedly connected to the fixed portion 611, and the threaded portion 622 is fixed on the side of the smooth rod portion 621 away from the fixed portion 611. The movable portion is provided with a through hole 614 adapted to the smooth rod portion 621. The smooth rod portion 621 passes through the through hole 614 and is rotatably connected to the movable portion.

[0053] Reference Figure 3 and Figure 4The threaded portion 622 is provided with an external thread on the outside, and the threaded portion 622 is threadedly connected to the first locking nut 63. When the first locking nut 63 is rotated, the first locking nut 63 moves closer to or away from the movable portion along the threaded portion 622. The threaded portion 622 is also provided with a first anti-slip plate 631 on the outside. The threaded portion 622 has a straight groove 623 formed on the outer circumference along the axial direction. The first anti-slip plate 631 is fixedly connected to a limiting plate 632 that adapts to the straight groove 623. The limiting plate 632 is located in the straight groove 623 and is slidably connected to the threaded portion 622 along the length of the straight groove 623. The threaded portion 622 limits the rotation of the first anti-slip plate 631 in the circumferential direction through the cooperation between the straight groove 623 and the limiting plate 632, so that the first anti-slip plate 631 moves only along the length of the threaded portion 622. When the first locking nut 63 is tightened, the first locking nut 63 pushes the first anti-slip piece 631 to fit the movable part, so that the first anti-slip piece 631 cooperates with the fixing part 611 to limit the rotation of the movable part around the light rod part 621 .

[0054] Reference Figure 2 and Figure 4 There are two movable parts, one of which is a mounting part 612, and the other is a plug-in part 613. The thickness of the mounting part 612 is greater than that of the plug-in part 613. A mounting groove 615 is provided in the middle of the mounting part 612, and the plug-in part 613 is located within the mounting groove 615 and contacts the inner wall of the mounting groove 615. A rotating rod 64 is provided between the mounting part 612 and the plug-in part 613. The rotating rod 64 passes through the mounting part 612 and the plug-in part 613 in sequence and is rotatably connected to both. Under the connecting action of the rotating block, the two straight cylinders 6 rotate around the rotating rod 64. When the straight cylinder 6 rotates, it cooperates with the rotating cylinder 5, thereby driving the connecting pipe 2 and the plug 4 to rotate. This facilitates the adjustment of the deflection angle between the connecting pipe 2 and the plug 4, making it suitable for different installation conditions.

[0055] Reference Figure 2 and Figure 4 A locking member is provided between the mounting portion 612 and the plug-in portion 613. The locking member includes a first locking bolt 81 and a second locking bolt 82. The first locking bolt 81 and the second locking bolt 82 are located on either side of the mounting portion 612 and are arranged opposite each other with the plug-in portion 613 as the center. Both the first locking bolt 81 and the second locking bolt 82 pass through the mounting portion 612 and are threadedly connected thereto. The end surface of the plug-in portion 613 facing the first locking bolt 81 is flat. When the first locking bolt 81 is tightened, the first locking bolt 81 passes through the mounting portion 612 and abuts against the plug-in portion 613, thereby limiting the relative displacement between the mounting portion 612 and the plug-in portion 613 through friction.

[0056] Reference Figure 2 and Figure 4A plurality of positioning slots 616 are provided on one side of the plug-in portion 613 near the second locking bolt 82, centered on the rotating rod 64. When the second locking bolt 82 is tightened, it passes through the mounting portion 612 and approaches the plug-in portion 613. The arc between adjacent positioning slots 616 is set according to a preset value. When the angle between the axes of the two straight cylinders 6 is 45°, 60°, or 90°, any positioning slot 616 will be directly opposite the second locking bolt 82. When the second locking bolt 82 is inserted into the positioning slot 616, it abuts against the inner wall of the positioning slot 616, thereby limiting the relative movement between the mounting portion 612 and the plug-in portion 613. When the angle between the axes of the two straight cylinders 6 is not the preset value, the first locking bolt 81 and the second locking bolt 82 cooperate to lock the plug-in portion 613, thereby improving ease of use.

[0057] Reference Figure 1 and Figure 3 Furthermore, keep the locking piece locked, loosen the first locking nut 63, rotate the movable part with the locking screw 62 as the center, repeat the above operation to adjust the two movable parts in turn, so that the two straight cylinders 6 are offset in the radial direction. At this time, the two straight cylinders 6 are parallel to each other and are in a non-coaxial state, which is suitable for a working environment where the pipeline and the joint are parallel but the ends are staggered, further improving the installation convenience.

[0058] Reference Figure 2 and Figure 3 A movable member is provided between the straight cylinder 6 and the rotating cylinder 5. The movable member comprises a movable screw 71, a second locking nut 72, and a second anti-slip plate 73. A plurality of guide bars are fixedly mounted along the outer circumference of the straight cylinder 6 along its axis, and grooves are formed on the inner wall of the rotating cylinder 5 to mate with the guide bars. When the rotating cylinder 5 is fitted onto the outer side of the straight cylinder 6, the guide bars are located within the grooves and abut against the inner wall of the grooves. The straight cylinder 6 uses the guide bars to limit the circumferential rotation of the rotating cylinder 5.

[0059] Reference Figure 2 and Figure 3 A connecting block 54 is fixed to the side of the rotating drum 5 near the rotating block. The connecting block 54 is directly opposite the fixed portion 611 of the straight drum 6. The movable screw 71 is arranged parallel to the straight drum 6 and passes through the connecting block 54 and is threadedly connected to the connecting block 54. A straight rod 711 is coaxially fixed to the end of the movable screw 71 near the fixed portion 611. The diameter of the straight rod 711 is smaller than that of the movable screw 71. The straight rod 711 passes through the fixed portion 611 and is rotatably connected to the fixed portion 611.

[0060] Reference Figure 2 and Figure 3, the second locking nut 72 is located at one end of the straight rod 711 away from the movable screw 71, and the second locking nut 72 is threadedly connected to the straight rod 711. When the second locking nut 72 is tightened, the second locking nut 72 approaches the fixed portion 611. When the straight rod 711 is rotated, the straight rod 711 drives the second locking nut 72 to rotate. The second anti-slip sheet 73 is located between the second locking nut 72 and the fixed portion 611, and is only slidably connected to the straight rod 711 along the length direction of the straight rod 711. When the straight rod 711 rotates, the second anti-slip sheet 73 is driven to rotate synchronously, and the second locking nut 72 pushes the second anti-slip sheet 73 to fit the fixed portion 611.

[0061] Reference Figure 2 and Figure 3 Under the restraining action of the second locking nut 72, when the movable screw 71 is rotated, the movable screw 71 drives the connecting block 54 to move along the axis of the straight tube 6, which in turn drives the rotating tube 5 to move, thereby adjusting the distance between the connecting nut 1 or plug 4 and the rotating rod 64, further increasing the installation range of the joint. After the joint is installed, the rotating tube 5 and the straight tube 6 are both in a positioned state, and both rotating tubes 5 and the two straight tubes 6 limit the position of the bellows 3. When water flows through the bellows 3, the rotating tube 5 and the straight tube 6 cooperate to limit the shaking of the bellows 3, which helps to improve the operating stability of the bellows 3.

[0062] The working principle of an adjustable joint according to an embodiment of the present application is as follows: a connecting pipe 2 is connected to a joint body via a connecting nut 1, and a plug 4 is connected to a desired pipe. Since the bellows 3 is rotatable, by rotating the two straight cylinders 6 about a rotating rod 64, the straight cylinders 6 drive the connecting pipe 2 and the plug 4 to deflect through the rotating cylinder 5, thereby facilitating adjustment of the deflection angle between the connecting pipe 2 and the plug 4. After adjustment, the two straight cylinders 6 are locked and limited by locking bolts 1 81 and 2 82. When water flows, the bellows 3 is limited by the connecting pipe 2, the bellows 3, and the plug 4, and the straight cylinders 6 and rotating cylinder 5, thereby limiting the range of movement of the bellows 3 after being impacted by the water flow and improving the working stability of the bellows 3. Furthermore, when the corresponding movable parts are rotated about the polished rod portion 621, the two straight cylinders 6 are radially offset, which is suitable for installation conditions where the pipe and the joint body are parallel but staggered, further improving the adjustment flexibility of the joint and enhancing the connection stability of the joint after installation.

[0063] The present application also discloses a process for processing an adjustable joint, comprising the following steps:

[0064] Material preparation: prepare the connecting nut 1, bellows 3, rotating cylinder 5 and straight cylinder 6 raw materials;

[0065] Assembly 1: Sleeve the two straight cylinders 6 onto the outside of the bellows 3, so that the two rotating blocks remain in a hinged state;

[0066] Connection 1: Install the connecting nut 1 on one end of the connecting pipe 2 by secondary injection molding;

[0067] Connection 2: Install and secure the bellows 3 to the end of the connecting pipe 2 away from the connecting nut 1:

[0068] Connection 3: The plug 4 is formed by injection molding and connected to the end of the bellows 3 away from the connecting pipe 2;

[0069] Assembly 2: Assemble the rotating drum 5 and sleeve it on the outside of the corresponding straight cylinder 6, so that it can be rotated and connected with the corresponding connecting pipe 2 or plug 4, and connect the rotating drum 5 with the corresponding straight cylinder 6 through the moving part;

[0070] Testing: Rotate the two straight cylinders 6 to bend the bellows 3, lock the two rotating blocks through the locking piece, and test the locking stability.

[0071] The connection step also includes:

[0072] One-shot molding: the inner tube 21 is manufactured by injection molding;

[0073] Installation: Pass the inner tube 21 through the connecting nut 1 and the metal outer tube 23 in sequence until the limiting ring 211 fits with the retaining ring 11;

[0074] Secondary molding: The outer tube 22 is molded outside the inner tube 21 and the metal outer tube 23 by injection molding.

[0075] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An adjustable joint, comprising a connecting nut (1) and a connecting pipe (2), wherein the connecting pipe (2) is hollow and is threadedly fixed to one axial end of the connecting pipe (2), characterized in that: The end of the connecting pipe (2) away from the connecting nut (1) is fixedly provided with a bellows (3), the end of the bellows (3) away from the connecting pipe (2) is fixedly provided with a plug (4) for connecting to a pipeline, the plug (4) and the side of the connecting pipe (2) close to the bellows (3) are both coaxially provided with a rotating cylinder (5), a straight cylinder (6) is sleeved inside the rotating cylinder (5), and the straight cylinder (6) is slidably connected to the rotating cylinder (5) along the axial direction, and a moving part is provided between the rotating cylinder (5) and the straight cylinder (6), and the moving part is used to drive the straight cylinder ( 6) and the rotating cylinder (5) move relative to each other along the axis direction, and the two straight cylinders (6) are connected to a rotating block on the side close to each other, and the two rotating blocks are hinged to each other. In one working state of the rotating block, the hinge axis between the two rotating blocks is perpendicular to the axis of the straight cylinder (6). A locking member is provided between the two rotating blocks, and the locking member locks the two rotating blocks when working; the rotating block includes a fixed part (611) and a movable part, the fixed part (611) is fixedly connected to the corresponding straight cylinder (6), and the movable part A through hole (614) is opened at one end along the length direction, and a locking screw (62) is fixed to the fixed part (611). The locking screw (62) passes through the through hole (614) and is rotatably connected to the movable part along the axis of the through hole (614). The locking screw (62) is provided with a first locking nut (63) for positioning the movable part. The ends of the two movable parts close to each other are provided with a same rotating rod (64). The rotating rod (64) passes through the two movable parts in sequence and is rotatably connected to the two movable parts. The member is used to limit the relative movement of the two movable parts around the rotating rod (64); when it is necessary to form an angle between the two straight cylinders (6), the limit of the movable part by the locking member is released, and the two straight cylinders (6) are rotated around the rotating rod (64); when it is necessary to make the two straight cylinders (6) in a non-coaxial state and parallel to each other, the locking member is kept locked, and the first locking nut (63) is loosened, and the movable part is rotated around the locking screw (62) so that the two straight cylinders (6) are offset in the radial direction.

2. The adjustable joint according to claim 1, characterized in that: The connecting tube (2) comprises an inner tube (21), an outer tube (22) and a metal outer tube (23); a retaining ring (11) is coaxially fixed to one end of the inner side of the connecting nut (1) along the axial direction; a limiting ring (211) adapted to the retaining ring (11) is fixedly connected to one end of the inner tube (21) along the axial direction; the inner tube (21) passes through the connecting nut (1) and the retaining ring (11) in sequence, and the retaining ring (211) fits the retaining ring (11); the metal outer tube (23) is sleeved on the outside of the inner tube (21), and one end of the metal outer tube (23) passes through the retaining ring (11) and contacts the retaining ring (211); the outer tube (22) is secondary molded on the end of the inner tube (21) away from the connecting nut (1) by injection molding, and is covered and fixed to the outside of the metal outer tube (23); the bellows (3) is fixedly connected and communicated with the end of the outer tube (22) away from the connecting nut (1).

3. The adjustable joint according to claim 2, characterized in that: The end of the bellows (3) along the length direction is fixedly connected to a mounting tube (31); a convex ring (32) is coaxially fixedly provided at one end of the mounting tube (31) away from the bellows (3); the outer diameter of the convex ring (32) is larger than the outer diameter of the mounting tube (31); an insert tube (221) is fixedly provided at one end of the outer tube (22) away from the bolt; the convex ring (32) and the mounting tube (31) are both sleeved on the outside of the insert tube (221) and fit with the outer circle of the insert tube (221); a mounting ring (222) is coaxially fixedly provided on the outer circle of the outer tube (22); the mounting ring (222) is located outside the convex ring (32) and the mounting tube (31), and the mounting ring (222) fits with both the convex ring (32) and the mounting tube (31).

4. The adjustable joint according to claim 3, characterized in that: The rotating cylinder (5) comprises a cylindrical portion (51), two arc-shaped plates (52) and a plurality of screws (53). An annular groove (223) is provided on the outer circle of the mounting ring (222) along the circumferential direction. The inner diameter of the cylindrical portion (51) is not less than the maximum outer diameter of the outer tube (22). The cylindrical portion (51) is sleeved on the outer side of the straight cylinder (6) and fits with the outer edge of the straight cylinder (6). The two arc-shaped plates (52) are both located in the annular groove (223) and fit with the inner wall of the annular groove (223). The cylindrical portion (51) contacts one end of the arc-shaped plate (52) away from the connecting nut (1). The plurality of screws (53) are arranged along the length direction of the arc-shaped plate (52), and the screws (53) pass through the arc-shaped plate (52) and are threadedly connected to the cylindrical portion (51).

5. The adjustable joint according to claim 1, characterized in that: The locking screw (62) includes a smooth rod portion (621) and a threaded portion (622), the smooth rod portion (621) is fixedly connected to the fixed portion (611), the threaded portion (622) is coaxially fixed to one end of the smooth rod portion (621) away from the fixed portion (611), the first locking nut (63) is threadedly connected to the threaded portion (622), the smooth rod portion (621) is located inside the through hole (614) and fits against the inner wall of the through hole (614), the outer circle of the threaded portion (622) is opened with a straight groove (623) along the axial direction, a first anti-slip sheet (631) is provided between the movable portion and the first locking nut (63), the first anti-slip sheet (631) is fixed with a limiting sheet (632), the limiting sheet (632) is located in the straight groove (623) and is slidably connected to the threaded portion (622) along the length direction of the straight groove (623).

6. The adjustable joint according to claim 1, characterized in that: The locking member includes a locking bolt 1 (81) and a locking bolt 2 (82). Of the two movable parts, any movable part is set as a mounting part (612), and the other movable part is set as a plug-in part (613). The mounting part (612) is provided with a mounting groove (615). The plug-in part (613) is located in the mounting groove (615) and is in contact with the inner wall of the mounting groove (615). The locking bolt 1 (81) and the locking bolt are respectively located on both sides of the plug-in part (613) and are arranged opposite to each other. , and both the locking bolt 1 (81) and the locking bolt 2 (82) pass through the mounting portion (612) and are threadedly connected to the mounting portion (612), the end surface of the plug-in portion (613) facing the locking bolt 1 (81) is flat, and a plurality of positioning grooves (616) are provided at one end of the plug-in portion (613) close to the locking bolt 2 (82) with the rotating rod (64) as the center, and the locking bolt 2 (82) is inserted into any positioning groove (616) and contacts the inner wall of the positioning groove (616).

7. The adjustable joint according to claim 1, characterized in that: The movable member comprises a movable screw (71), a second locking nut (72) and a second anti-slipping piece (73); the outer side of the rotating drum (5) is fixedly connected with a connecting block (54); the movable screw (71) passes through the connecting block (54) and is threadedly connected to the connecting block (54); a straight rod (711) is coaxially fixed to one end of the movable screw (71) close to the fixed block; the diameter of the straight rod (711) is smaller than the diameter of the movable screw (71); the straight rod (711) passes through the fixed portion (611) and is rotatably connected to the fixed portion (611); the second locking nut (72) is threadedly connected to one end of the straight rod (711) away from the movable screw (71); the second anti-slipping piece (73) is located between the second locking nut (72) and the fixed portion (611); when the straight rod (711) rotates, the second anti-slipping piece (73) is driven to rotate synchronously.

8. A processing technology applied to an adjustable joint as claimed in any one of claims 1 to 7, characterized in that: The steps include: Material preparation: prepare the connecting nut (1), bellows (3), rotating cylinder (5) and straight cylinder (6) raw materials; Assembly 1: Both straight cylinders (6) are sleeved on the outside of the corrugated tube (3) so that the two rotating blocks remain in a hinged state; Connection 1: Install the connecting nut (1) on one end of the connecting pipe (2) by secondary injection molding; Connection 2: Install and secure the bellows (3) to the end of the connecting pipe (2) away from the connecting nut (1): Connection three: the plug (4) is molded by injection molding and connected to the end of the corrugated tube (3) away from the connecting tube (2); Assembly 2: Assemble the rotating drum (5) and sleeve it on the outside of the corresponding straight cylinder (6), so that it can be rotated and connected with the corresponding connecting pipe (2) or plug (4), and connect the rotating drum (5) with the corresponding straight cylinder (6) through the moving part; Testing: Rotate the two straight cylinders (6) to bend the bellows (3), lock the two rotating blocks through the locking piece, and test the locking stability.

9. A processing technology according to claim 8, characterized in that: The following steps are also included: One-step molding: manufacturing the inner tube (21) by injection molding; Installation: Pass the inner tube (21) through the connecting nut (1) and the metal outer tube (23) in sequence until the limiting ring (211) fits with the retaining ring (11); Secondary molding: The outer tube (22) is molded on the outer sides of the inner tube (21) and the metal outer tube (23) by injection molding.

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