Clamp for turning pipeline joint

Abstract

The invention belongs to the technical field of turning of pipeline joints, and relates to a clamp for turning of a pipeline joint. The device comprises a seat body, a clamping assembly, an insertion rod, a limiting assembly, a counterweight ring and a transmission assembly. The inserting rod is provided with a first position and a second position; when the pipeline connector is placed on the clamping assembly, the inserting rod making contact with the pipeline connector is pressed to the second position, and the other inserting rods are kept at the first position. The limiting assembly is matched with one of the inserting rods located at the second position in an inserted mode so that the clamping assembly can be locked in the machining state, and rotation of the clamping assembly relative to the base body is limited. And when the heavy ring rotates relative to the seat body, the clamping assembly is driven to rotate through the transmission assembly until the next insertion rod located at the second position is matched with the limiting assembly, and the clamping assembly is locked again. The automatic locking and rotating switching device can realize automatic locking, rotating switching and self-adaption to pipeline joints with different end part numbers, and has the advantages of high automation degree and high applicability.

Description

Technical Field

[0001] This invention belongs to the field of turning technology for pipe joints, and relates to a fixture for turning pipe joints. Background Technology

[0002] Pipe fittings, such as four-way, three-way, and two-way fittings, are key connecting components in piping systems. Their ends typically require machining to achieve precise fit with other pipe fittings. Because pipe fittings have multiple ends, during machining, operators need to fix the fitting in the lathe fixture, complete machining one end, stop the machine, remove the workpiece, and re-clamp it to machine the next end. This increases labor intensity and is detrimental to improving machining efficiency. Furthermore, for pipe fittings with different numbers of ends, manual adjustment of the rotation angle is required, which is cumbersome and prone to errors.

[0003] A patent document with publication number CN118635540A discloses an improved pipe fitting turning fixture. This fixture uses a combination of a limiting element and centrifugal force. When the mounting base rotates at high speed, the limiting element contacts the fixed block under the action of centrifugal force, thereby restricting the rotation of the square rod and preventing deviation during processing. After the mounting base stops rotating, a reset element drives the limiting element to reset, and the actuator drives the square rod to rotate 90 degrees, realizing automatic switching of the unprocessed end of the pipe fitting. However, for pipe fittings with different numbers of ends, such as Y-type tees requiring 120° and tees requiring 180°, it lacks adaptability and cannot meet the turning requirements of various pipe fittings. When facing mixed production of multiple types of pipe fittings, manual intervention or additional adjustments are still required, which is difficult to meet the flexibility requirements of intelligent manufacturing.

[0004] To address the above problems, this invention proposes a fixture for turning pipe joints. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention proposes a fixture for turning pipe joints, which can adaptively adjust the rotation angle according to the number of pipe joint ends, thereby realizing continuous automated processing of each end of a multi-port pipe joint.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] Fixtures for turning pipe fittings include:

[0008] The base is rotatable.

[0009] A clamping assembly, rotatably mounted in the housing, is used to clamp a pipe fitting, the clamping assembly comprising at least two opposing clamping plates;

[0010] Multiple insert rods are distributed circumferentially along the clamping plate and slidably disposed along the clamping plate axially. The insert rods have a first position and a second position. When the pipe joint is placed on the clamping assembly, the insert rod in contact with the pipe joint is pressed to the second position, while the remaining insert rods remain in the first position.

[0011] A limiting component is disposed on the base and engages with one of the inserts in the second position to lock the clamping component in the processing state and restrict the rotation of the clamping component relative to the base.

[0012] The counterweight ring is rotatably mounted on the outer circumference of the seat body, and continues to rotate relative to the seat body due to inertia when the seat body decelerates or stops;

[0013] A transmission component is connected between the counterweight ring and the clamping component. When the counterweight ring rotates relative to the base, it drives the clamping component to rotate through the transmission component until the next insertion rod in the second position cooperates with the limiting component to relock the clamping component.

[0014] Furthermore, the limiting component includes:

[0015] A limiting socket is slidably mounted on the base, and the limiting socket is provided with a socket for insertion and engagement with the end of the plug rod;

[0016] The second spring is connected between the base and the limit socket.

[0017] Furthermore, the limiting socket is provided with an inclined surface. When the clamping assembly rotates relative to the base, the plug rod in the second position can push open the limiting socket through the inclined surface, and be driven to reset by the second spring when aligned with the plug hole to achieve plugging.

[0018] Furthermore, the transmission assembly includes:

[0019] A rack is connected to the counterweight ring;

[0020] The end face gear is fixedly connected to a rotating shaft that is rotatably connected to the base body, and the clamping assembly is connected to the rotating shaft;

[0021] The relative rotation of the counterweight ring drives the rack to rotate the end face gear.

[0022] Furthermore, the counterweight ring is also provided with a trigger element. When the counterweight ring rotates relative to the counterweight ring, the trigger element triggers the limiting component to move outward and release the insertion engagement with the current insertion rod.

[0023] Furthermore, the trigger is a lever, and the limiting component is provided with a triangular block that cooperates with the lever; the lever is configured to swing in one direction, so as to push the triangular block in the driving direction to drive the limiting component to move outward, and to avoid the triangular block in the reset direction.

[0024] Furthermore, the rack is elastically slidably connected to a fixed slide rod, which is fixedly connected to the counterweight ring.

[0025] Furthermore, the clamping assembly also includes at least one driving member mounted on the base body for driving the two clamping plates to move closer or further apart.

[0026] Furthermore, the driving component is an electric telescopic rod, and the telescopic end of the electric telescopic rod is fixedly connected to the clamping plate.

[0027] Furthermore, a magnet is fixedly connected to the end of the insertion rod, and the two corresponding insertion rods are attracted together by the magnet.

[0028] Compared with the prior art, the present invention has the following advantages: When the counterweight ring rotates relative to the base under the action of inertia, after the corresponding insertion rod disengages from the limit socket, the counterweight ring drives the clamping assembly to rotate under the action of the transmission component. The clamping assembly drives the pipe joint to rotate. When the next insertion rod in the second position, that is, the insertion rod in contact with the next end to be turned, moves to the position corresponding to the limit socket, it is inserted into the limit socket, and the clamping assembly is locked again, so that the next end to be turned is in the turning position, so as to facilitate turning. Therefore, it can automatically adapt to the switching of different pipe joint ends, realize the automatic processing of different types of pipe joints, and has the advantages of high automation and strong applicability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the mounting block in this invention;

[0031] Figure 3 This is a schematic diagram of the structure of the base in this invention;

[0032] Figure 4 This is a schematic diagram of the rack structure in this invention;

[0033] Figure 5 This is a schematic diagram of the end face gear in this invention;

[0034] Figure 6 This is a cross-sectional view of the base in this invention;

[0035] Figure 7 This is a schematic diagram of the limiting socket in this invention;

[0036] Figure 8 This is a schematic diagram of the state when the insertion rod is initially in the first position in this invention;

[0037] Figure 9 This is a schematic diagram of the clamping plate in this invention;

[0038] Figure 10 This is a schematic diagram showing the state of the pipe joint being installed on the clamping assembly in this invention;

[0039] Figure 11 This is a schematic diagram of the fit between the four-way pipe joint and the clamp in this invention;

[0040] Figure 12 This is a schematic diagram of the fit between the right-angle tee pipe joint and the clamp in this invention;

[0041] Figure 13 This is a schematic diagram of the fit between the Y-type tee pipe joint and the clamp in this invention;

[0042] Figure 14 This is a schematic diagram of the fit between the two-way pipe joint and the clamp in this invention.

[0043] In the diagram: 1. Base; 2. Mounting block; 3. Electric telescopic rod; 4. Clamping plate; 5. Insert rod; 6. Sliding groove; 7. First spring; 8. Magnet; 9. Rotating shaft; 10. One-way bearing; 11. End face gear; 12. Limiting socket; 13. Inclined surface; 14. Rectangular rod; 15. Triangular block; 16. Second spring; 17. Counterweight ring; 18. Arc spring; 19. Rack; 20. Fixed slide rod; 21. Lever; 22. Protective cover. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] like Figures 1-14 As shown, the technical solution adopted by the present invention is as follows: the fixture for turning pipe joints includes a base 1, a clamping assembly, a insertion rod 5, a limiting assembly, a counterweight ring 17, and a transmission assembly.

[0046] The base 1 has a cylindrical structure and is rotatable around its axis. For example... Figure 2 As shown, a mounting block 2 is fixedly connected to one side of the base 1 for connection to an external drive motor. The external drive motor drives the base 1 to rotate.

[0047] The clamping assembly is rotatably mounted within the base 1 and is used to clamp the pipe fitting. Specifically, as shown... Figure 1 , Figure 6 and Figure 7 As shown, the clamping assembly includes two symmetrically arranged clamping plates 4 and two driving components. The two clamping plates 4 and the two driving components correspond one-to-one. In this embodiment, the driving component is an electric telescopic rod 3. The electric telescopic rod 3 is installed inside the base 1, and its telescopic end is fixedly connected to the corresponding clamping plate 4, used to drive the clamping plate 4 to move. This causes the two clamping plates 4 to move closer or further apart to clamp or release the pipe joint.

[0048] The end of the electric telescopic rod 3 furthest from the clamping plate 4 is fixedly connected to a rotating shaft 9. The rotating shaft 9 is rotatably connected to the base 1, thereby allowing the clamping assembly to rotate relative to the base 1 about the axis of the rotating shaft 9. The axis of the rotating shaft 9 is perpendicular to the axis of the base 1.

[0049] A coil spring is installed between the rotating shaft 9 and the base 1, with both ends of the coil spring fixedly connected to the rotating shaft 9 and the base 1 respectively. In the unclamped state, the coil spring is in a state of no force, keeping the clamping assembly in its initial position.

[0050] like Figure 9 As shown, the clamping plate 4 has multiple grooves for accommodating pipe fittings. Figure 11 , Figure 12 , Figure 13 as well as Figure 14 As shown, the multiple grooves can be used to place different pipe fittings, such as four-way pipe fittings, right-angle tee pipe fittings, Y-type tee pipe fittings, and two-way pipe fittings.

[0051] Each clamping plate 4 has a corresponding groove position on which an insertion rod 5 is slidably disposed. Multiple insertion rods 5 are distributed circumferentially along the corresponding clamping plate 4, and the insertion rods 5 can slide axially relative to the clamping plate 4. Specifically, sliding grooves 6 are formed on both sides of the insertion rod 5. The sliding grooves 6 are slidably connected to a fixed slider fixedly connected to the clamping plate 4, thereby guiding the insertion rod 5 to slide axially. A first spring 7 is fixedly connected to the end of the sliding groove 6, and the other end of the first spring 7 is fixedly connected to the fixed slider on the clamping plate 4. The first spring 7 is used to reset the insertion rod 5.

[0052] like Figure 8 As shown, a magnet 8 is fixedly connected to the end of the insertion rod 5, and a rubber layer is fixedly connected to the end face of the magnet 8. When the two corresponding insertion rods 5 are close together, they can be attracted and fixed to each other by the magnet 8.

[0053] The insertion rod 5 has a first position and a second position. For example... Figure 8 As shown, when the insertion rod 5 extends to its limit position under the action of the first spring 7 and is attracted to the opposite insertion rod 5 by the magnet 8, it is in the first position. Figure 10As shown, when the insertion rod 5 is pressed by the pipe joint and retracts relative to the clamping plate 4, it is in the second position. When the insertion rod 5 is in the second position, it has an auxiliary clamping effect on the pipe joint, thereby making the pipe joint stably positioned in the corresponding groove.

[0054] A limiting component is provided on the base 1 for selectively engaging with the insertion rod 5 in the second position to lock the clamping component in the processing state and prevent the clamping component from rotating relative to the base 1.

[0055] Specifically, the limiting assembly includes a limiting socket 12 and a second spring 16. Two limiting sockets 12 are symmetrically slidably connected to the base 1, and each limiting socket 12 has a socket with a shape adapted to the end of the insertion rod 5. An inclined surface 13 is provided on the outer side of the limiting socket 12 to facilitate the insertion of the insertion rod 5. A rectangular rod 14 is fixedly connected to the end of the limiting socket 12, and the rectangular rod 14 is slidably connected to the base 1. The rectangular rod 14 slides through the base 1. A triangular block 15 is fixedly connected to the outer end of the rectangular rod 14 on the base 1.

[0056] The inner wall of the base 1 has a mounting groove that matches the limiting socket 12, and one end of the limiting socket 12 is slidably disposed in the mounting groove. A second spring 16 is disposed in the mounting groove. One end of the second spring 16 is fixedly connected to the limiting socket 12, and the other end is fixedly connected to the base 1. The second spring 16 is used to drive the limiting socket 12 to remain in a locked position where it can be inserted and engaged with the plug 5 in the second position.

[0057] In this embodiment, the limiting socket 12, rectangular rod 14, and triangular block 15 are all made of lightweight materials to reduce the centrifugal force experienced when the seat 1 rotates, preventing the limiting components from shifting outward under the action of centrifugal force and disengaging from the corresponding insertion rod 5. When the seat 1, clamping components, and pipe joint rotate, the corresponding insertion rod 5 remains inserted into the limiting socket 12, that is, the clamping components remain locked and will not accidentally rotate around the rotating shaft 9.

[0058] The counterweight ring 17 is rotatably mounted on the outer circumference of the base 1, and can continue to rotate relative to the base 1 due to inertia when the base 1 decelerates or stops. An arc-shaped spring 18 connects the counterweight ring 17 and the base 1, with both ends of the spring 18 fixedly connected to the counterweight ring 17 and the base 1, respectively. Figure 6 As shown, an arc-shaped groove is formed on the outer circumference of the base 1, and a connecting block is slidably disposed in the arc-shaped groove. The connecting block is fixedly connected to the counterweight ring 17. An arc-shaped spring 18 is disposed in the arc-shaped groove.

[0059] A transmission assembly is provided between each clamping plate 4 and the counterweight ring 17. When the counterweight ring 17 rotates relative to the base 1, the counterweight ring 17 drives the clamping plate 4 to rotate around the corresponding rotating shaft 9 under the action of the transmission assembly. The two clamping plates 4 rotate simultaneously, and the two clamping plates 4 drive the pipe joint to rotate simultaneously, thereby switching the end of the pipe joint that needs to be machined.

[0060] The transmission assembly includes a rack 19 and an end gear 11. The rack 19 is slidably connected to the outer side of the counterweight ring 17, and a fixed slide rod 20 is slidably connected inside the rack 19. The end of the fixed slide rod 20 is fixedly connected to the counterweight ring 17. A third spring (not shown in the figure) is fixedly connected to the sliding cavity inside the rack 19, and the end of the third spring is fixedly connected to the end of the fixed slide rod 20, forming an elastic buffer structure. The end gear 11 is mounted to the end of the rotating shaft 9 via a one-way bearing 10.

[0061] The counterweight ring 17 is provided with a trigger. When the counterweight ring 17 rotates relative to the seat 1, the trigger moves before the clamping component to trigger the limiting component to move outward and release the insertion engagement with the current insertion rod 5.

[0062] The triggering element includes a lever 21. Two levers 21 are also hinged to the outer side of the counterweight ring 17. A torsion spring (not shown) is installed at the hinge point between the lever 21 and the counterweight ring 17 to maintain the lever 21 in its initial state. In this embodiment, as... Figure 10 As shown, the lever 21 is shaped to rotate only clockwise and not counterclockwise. Therefore, when the counterweight ring 17 rotates clockwise relative to the base 1, it pushes the triangular block 15 in the driving direction, causing the limiting component to move outward. In the reset direction, when the counterweight ring 17 rotates counterclockwise relative to the base 1, it avoids the triangular block 15.

[0063] Specifically, the end of the lever 21 near the counterweight ring 17 is set in an arc shape on the clockwise side, so that the lever 21 can rotate clockwise.

[0064] like Figure 1 and Figure 2 As shown, a protective cover 22 is fixedly connected to the outside of the base 1, which serves to protect and prevent dust.

[0065] Working principle:

[0066] Figures 1 to 9The diagram shows the initial state of the device. At this time, the coil spring is unloaded, keeping the clamp 4 in its initial position, and the corresponding insert 5 is in the position corresponding to the limiting socket 12. Multiple inserts 5 are in the first position (extended state) under the action of the first spring 7, and the magnets 8 at the ends of the corresponding upper and lower inserts 5 are attracted together. Under the action of the second spring 16, the limiting socket 12 is in the locked position. The arc spring 18 is in its natural state, and the connecting block abuts against the end of the arc groove. Under the action of the third spring, the fixing slide 20 extends outside the rack 19. The lever 21 remains in its initial state under the action of the torsion spring. The initial state refers to: as... Figure 4 , Figure 5 As shown, under the action of the torsion spring, the lever 21 remains in an upright extended state perpendicular to the outer circumference of the counterweight ring 17. At this time, the lever 21 can only rotate clockwise and cannot rotate counterclockwise.

[0067] Taking a four-way pipe joint as an example, the process is as follows: First, the two electric telescopic rods 3 are shortened, causing the two clamping plates 4 to move away from each other. During this process, the insertion rod 5 moves with the clamping plates 4, and the magnet 8 at the end of the corresponding insertion rod 5 separates. When the two clamping plates 4 have moved away to a certain extent, the electric telescopic rods 3 are closed. At this time, the insertion rod 5 corresponding to the limit socket 12 has been inserted into the limit socket 12.

[0068] Then, the four-way pipe fitting to be machined is placed in the groove on the lower clamping plate 4. Under the gravity of the four-way pipe fitting, the four inserts 5 corresponding to the four ends of the four-way pipe fitting are pressed down, overcoming the elasticity of the first spring 7 and moving downward relative to the clamping plate 4 to the second position (retracted state).

[0069] Then, the two electric telescopic rods 3 are extended, bringing the two clamping plates 4 closer together to clamp and fix the four-way pipe joint. During this process, multiple inserts 5 located on the upper clamping plate 4 continuously approach the four-way pipe joint. Among them, the four inserts 5 corresponding to the four-way pipe joint move upward relative to the clamping plate 4 to a second position after contacting the four-way pipe joint, overcoming the elasticity of the first spring 7. The four-way pipe joint is clamped and fixed between the two clamping plates 4. Then, the electric telescopic rods 3 are closed.

[0070] The current state is as follows: Figure 10 As shown, the inserts 5 corresponding to the ends of the four-way pipe joint are all in the second position, and the insert 5 corresponding to the limiting socket 12 is inserted into the limiting socket 12 at this time. The remaining inserts 5 not corresponding to the ends of the four-way pipe joint are still in the first position, and the two corresponding inserts 5 are fixed by magnets 8.

[0071] Start the external drive motor, such as Figure 10The direction shown causes the base 1 to rotate clockwise, which in turn causes the clamping assembly and the four-way pipe connector to rotate clockwise synchronously. At the same time, the base 1 pushes the counterweight ring 17 to rotate clockwise through the connecting block, and the counterweight ring 17 rotates synchronously with the base 1.

[0072] Because the limiting component is made of lightweight material, the centrifugal force it experiences is less than the elastic force of the second spring 16. Therefore, the limiting socket 12 remains in the locked position, thus maintaining the lock on the clamping component. At the same time, the centrifugal force experienced by the insertion rods 5 in the first position is less than the attraction force of the magnet 8. Therefore, these insertion rods 5 remain in an attracted state and will not move relative to the clamping plate 4.

[0073] Since each of the two clamping plates 4 has a rod 5 inserted into one of the two limiting sockets 12, the two clamping plates 4 cannot rotate around the pivot 9 under the limiting action of the rod 5 and the limiting socket 12, and are in a locked state, ensuring that the pipe joint is not easily displaced during processing. By rotating the pipe joint through the base 1 and cooperating with the external cutting tool, the first end of the pipe joint can be machined.

[0074] After the first end is machined, the drive motor is stopped. This stops the rotation of the base 1 and the pipe joint, but the counterweight ring 17 continues to rotate clockwise relative to the base 1 due to inertia. The counterweight ring 17 drives the rack 19, the fixed slide bar 20, and the lever 21 to rotate synchronously.

[0075] First, the lever 21 contacts the triangular block 15. Since the lever 21 cannot rotate counterclockwise, after contacting the triangular block 15, the lever 21 remains in its initial state, pushing the triangular block 15 to move outward. The triangular block 15, through the rectangular rod 14, drives the limiting socket 12 to move outward, compressing the second spring 16. When the limiting socket 12 moves outward and completely disengages from the corresponding insertion rod 5, the clamping assembly is released.

[0076] At the same time, rack 19 meshes with end gear 11, driving end gear 11 to rotate. End gear 11 drives shaft 9 to rotate via one-way bearing 10, and shaft 9 drives clamp 4 and pipe joint to rotate via electric telescopic rod 3. After the end of insertion rod 5 is misaligned with the insertion hole of limit socket 12, triangular block 15 loses the limit of lever 21, and triangular block 15, rectangular rod 14 and limit socket 12 move and reset under the action of second spring 16.

[0077] As the rack 19 continues to drive the end face gear 11 to rotate, the pipe fitting continues to rotate. When the next insertion rod 5 in the second position, that is, the insertion rod 5 corresponding to the next end of the pipe fitting to be processed, rotates to the position corresponding to the limit socket 12, the insertion rod 5 first contacts the inclined surface 13, pushing the limit socket 12 to move outward. When the insertion rod 5 is aligned with the insertion hole, the limit socket 12 is reset and inserted under the action of the second spring 16, and the clamping assembly is re-locked.

[0078] After the two clamping plates 4 are relocked, the rack 19 can no longer drive the end face gear 11 to rotate. At this time, if the counterweight ring 17 still has inertial potential energy, the fixed slide rod 20 will slide into the rack 19, compressing the third spring inside the rack 19, which plays a buffering role and prevents the meshing teeth on the rack 19 and the end face gear 11 from being damaged due to sudden jamming.

[0079] The third spring has a certain preset preload, which ensures that it can drive the end face gear 11 to rotate during normal driving, and can also be compressed when buffering is needed.

[0080] Then, the drive motor is restarted to rotate the base 1 clockwise, while the counterweight ring 17 rotates counterclockwise relative to the base 1. During this process, the end face gear 11 rolls along the rack 19, but the shaft 9 remains stationary due to the action of the one-way bearing 10. When the lever 21 passes the triangular block 15 in the reverse direction, since the lever 21 can rotate clockwise, it will be blocked by the triangular block 15, causing the lever 21 to rotate clockwise and pass smoothly through the triangular block 15. During this process, the triangular block 15 remains stationary. This continues until the connecting block abuts against the end of the arc-shaped groove, after which the base 1 drives the counterweight ring 17 to rotate synchronously.

[0081] The base 1 drives the next end of the pipe joint to be machined.

[0082] Similarly, repeat the above process until all four ends are processed.

[0083] After all four ends of the four-way pipe joint have been machined, the drive motor is turned off. The base 1 stops rotating, while the counterweight ring 17 continues to rotate clockwise under inertia.

[0084] Finally, the counterweight ring 17 rotates in the opposite direction and returns to its initial position under the elastic action of the arc spring 18.

[0085] By controlling the two electric telescopic rods 3 to shorten, the two clamping plates 4 are moved away from each other, allowing the processed pipe joint to be removed. After the pipe joint is removed, the multiple plug rods 5 that were originally pressed down move back to the first position under the action of the first spring 7. Then, by controlling the two electric telescopic rods 3 to extend, the plug rods 5 are moved, causing the plug rods 5 located in the limit socket 12 to disengage.

[0086] Finally, the clamping assembly rotates back to its initial state under the action of the coil spring, ready for the next processing.

[0087] As the counterweight ring 17 rotates clockwise relative to the seat 1 under the action of inertia, the limiting component moves outward to release the locking of the clamping component. When the plug rod 5 in the first position passes the limiting socket 12, it will not be inserted into the limiting socket 12. It will not be until the next plug rod 5 in the second position, that is, the plug rod 5 that contacts the pipe joint, is inserted into the limiting socket 12. This makes the next end of the pipe joint in the turning position. Therefore, it can automatically adapt to pipe joints with different numbers of ends and realize automatic turning of various pipe joints.

[0088] For example, such as Figure 11 As shown, for a four-way pipe joint, since there are four ends, the corresponding four insertion rods 5 are pressed to the second position. The included angle between two adjacent insertion rods 5 in the second position is 90°. Therefore, the angle of each rotation switch is 90°.

[0089] Figure 12 As shown, for a right-angle tee pipe joint, the rotation angle is 90°, and the three ends can be machined in sequence.

[0090] like Figure 13 As shown, for a Y-shaped tee pipe joint, the three corresponding inserts 5 are pressed to the second position, with an adjacent included angle of 120° and a rotation switching angle of 120°, so that the three ends can be machined in sequence.

[0091] Figure 14 As shown, for the two-way pipe joint, the two corresponding inserts 5 are pressed to the second position with an included angle of 180° and a rotation switching angle of 180°, and the two ends are machined in sequence.

[0092] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A fixture for turning pipe joints, characterized in that, include: The base (1) is rotated. A clamping assembly is rotatably mounted inside the base (1) for clamping a pipe fitting, the clamping assembly comprising at least two opposing clamping plates (4). Multiple insert rods (5) are distributed circumferentially along the clamping plate (4) and slidably disposed along the clamping plate (4). The insert rods (5) have a first position and a second position. When the pipe joint is placed on the clamping assembly, the insert rod (5) in contact with the pipe joint is pressed to the second position, while the remaining insert rods (5) remain in the first position. A limiting component is provided on the base (1) and is inserted into one of the plug rods (5) in the second position to lock the clamping component in the processing state and restrict the rotation of the clamping component relative to the base (1); The counterweight ring (17) is rotatably mounted on the outer circumference of the seat (1), and continues to rotate relative to the seat (1) due to inertia when the seat (1) decelerates or stops. The transmission component is connected between the counterweight ring (17) and the clamping component. When the counterweight ring (17) rotates relative to the seat (1), it drives the clamping component to rotate through the transmission component until the next insertion rod (5) in the second position cooperates with the limiting component to relock the clamping component.

2. The fixture for turning pipe joints according to claim 1, characterized in that, The limiting component includes: The limiting socket (12) is slidably disposed on the base (1), and the limiting socket (12) is provided with a socket for insertion and cooperation with the end of the plug rod (5); The second spring (16) is connected between the seat (1) and the limit socket (12).

3. The fixture for turning pipe joints according to claim 2, characterized in that: The limiting socket (12) is provided with a slope (13). When the clamping assembly rotates relative to the base (1), the plug rod (5) in the second position can push open the limiting socket (12) through the slope (13) and be driven to reset by the second spring (16) when aligned with the plug hole to achieve plugging.

4. The fixture for turning pipe joints according to claim 1, characterized in that, The transmission assembly includes: Rack (19) is connected to the counterweight ring (17). The end face gear (11) is fixedly connected to the rotating shaft (9) which is rotatably connected to the seat (1), and the clamping assembly is connected to the rotating shaft (9); The relative rotation of the counterweight ring (17) drives the rack (19) to drive the end face gear (11) to rotate.

5. The fixture for turning pipe joints according to claim 1, characterized in that: The counterweight ring (17) is also provided with a trigger. When the counterweight ring (17) rotates relative to the counterweight ring, the trigger triggers the limiting component to move outward and release the insertion and engagement with the current insertion rod (5).

6. The fixture for turning pipe joints according to claim 5, characterized in that: The trigger is a lever (21), and the limiting component is provided with a triangular block (15) that cooperates with the lever (21); the lever (21) is set to swing in one direction to push the triangular block (15) in the driving direction to drive the limiting component to move outward, and to avoid the triangular block (15) in the reset direction.

7. The fixture for turning pipe joints according to claim 4, characterized in that: The rack (19) is elastically slidably connected to a fixed slide rod (20), and the fixed slide rod (20) is fixedly connected to the counterweight ring (17).

8. The fixture for turning pipe joints according to claim 1, characterized in that: The clamping assembly also includes at least one drive element mounted on the base (1) for driving the two clamping plates (4) to move closer or further apart from each other.

9. The fixture for turning pipe joints according to claim 8, characterized in that: The driving component is an electric telescopic rod (3), and the telescopic end of the electric telescopic rod (3) is fixedly connected to the clamp (4).

10. The fixture for turning pipe joints according to claim 1, characterized in that: The end of the insertion rod (5) is fixedly connected to a magnet (8), and the two corresponding insertion rods (5) are attracted together by the magnet (8).

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