A straightening device for pipe production

Abstract

The embodiment of the present disclosure relates to the technical field of pipe straightening, and one embodiment of the present disclosure provides a straightening device for pipe production, which comprises straightening rollers, the straightening rollers are arranged in sequence and form a straightening space therebetween, the straightening space is used for pipe passing and straightening; support joints, the support joints are hingedly connected in sequence and are used for being placed in the pipe to support the pipe; and a connecting rod, one end of the connecting rod is connected with one of the support joints at the end portion, and the other end of the connecting rod is used for being fixed, so that the movement of the support joint is limited. Through the above technical scheme, the technical problem that the pipe may be inwardly deformed during straightening in the prior art is solved. The support joints are arranged in the pipe to provide internal support for the pipe, the inward deformation problem caused by external force during straightening is effectively avoided, the hinged connection between the support joints enables the support joints to adapt to pipes with different bending degrees, and the connection between the connecting rod and the fixing seat enables the support joints to be well limited in movement.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the field of pipe straightening technology, in particular, to a straightening device for pipe production. BACKGROUND

[0002] In pipe production, straightness is a key quality indicator. Defects such as bending are prone to occur in the process due to material properties, equipment precision, etc. Therefore, the straightening process is crucial. It makes the pipe plastic deformation through external force to ensure straightness. The existing straightening device is mainly roller type, which clamps and rolls the pipe through multiple straightening rollers, and eliminates bending by using straightening curves. However, the existing device has obvious defects when straightening thin-walled pipes: the straightening force acts on the outer surface, and there is no support inside. Thin-walled pipes have low stiffness and are prone to internal collapse under external force, causing cross-section distortion or even pipe wall rupture, affecting the yield rate. When the wall thickness of thin-walled pipes is relatively thin, the anti-instability ability is poor, and internal collapse cannot be avoided by reducing the straightening pressure. If the pressure is insufficient, the straightening precision is not enough, forming a contradiction. For precision pipes, internal collapse will also affect their performance. Therefore, how to avoid internal collapse of thin-walled pipes while ensuring straightening precision is a problem to be solved. SUMMARY

[0003] To overcome the above-mentioned defects, embodiments of the present disclosure provide a straightening device for pipe production, which solves the technical problem of possible internal collapse of pipes during straightening in the prior art.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a straightening device for pipe production, comprising:

[0005] a plurality of straightening rollers arranged in sequence and forming a straightening space therebetween, the straightening space being used for the pipe to pass through and be straightened;

[0006] a plurality of support joints arranged in sequence and hinged, used for being placed in the pipe to support the pipe;

[0007] a connecting rod, one end of the connecting rod being connected with one of the support joints at the end portion, and the other end of the connecting rod being used for being fixed, thereby limiting the movement of the support joints.

[0008] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure further comprises:

[0009] a seat body, the seat body being arranged on one side of the connecting rod, the seat body having a horizontal through hole, the connecting rod penetrating through the through hole, and the through hole being used for the pipe to pass through.

[0010] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure, one end of the connecting rod close to the seat body has a long hole, and further comprises:

[0011] A mobile clamping piece is slidingly arranged on the seat body and can enter the through hole and be inserted into the long slot to limit the movement of the connecting rod.

[0012] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure comprises:

[0013] A joint body has a guide groove at one end;

[0014] A sliding block is slidingly arranged in the guide groove and is hingedly connected to another adjacent joint body;

[0015] A first elastic member acts on the groove wall of the guide groove at one end and acts on the sliding block at the other end to provide a force for the outward sliding of the sliding block in the guide groove.

[0016] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure further comprises a hydraulic cavity in the joint body, which comprises:

[0017] A sliding support piece is slidingly arranged on the joint body, protrudes from the outer wall of the joint body at one end, and extends into the hydraulic cavity at the other end to be acted on by the hydraulic cavity to approach and support the inner wall of the pipe. The sliding support pieces are arranged in a plurality of circumferential rows, the end portion protruding from the outer wall of the joint body is in a cylindrical shape, and the sliding support pieces have at least a pipe supporting state and a retracted state. When in the pipe supporting state, the sliding support pieces slide outward under the hydraulic action of the hydraulic cavity and support the inner wall of the pipe. When in the retracted state, the hydraulic cavity is depressurized, and the sliding support pieces move away from the inner wall of the pipe.

[0018] A hydraulic source is arranged on the seat body and is connected to the hydraulic cavity through a flexible pipeline and a connecting channel arranged on the joint body.

[0019] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure further comprises a triggering assembly, which comprises:

[0020] A triggering sliding block is slidingly arranged on the joint body and can seal the connecting channel after sliding. The sliding direction of the triggering sliding block is parallel to the sliding direction of the sliding support piece, one end of the triggering sliding block protrudes from the outer wall of the joint body, the triggering sliding block is closer to the connecting rod than the sliding support piece, and can be pushed and slid by the inner wall of the inwardly protruding pipe.

[0021] A second elastic member acts on the triggering sliding block at one end and acts on the joint body at the other end to provide a force for the outward sliding of the triggering sliding block and the sealing of the connecting channel.

[0022] The trigger slider has at least an extended state and a triggered state, in the extended state, the trigger slider slides outward and seals the connecting channel; in the triggered state, the trigger slider slides inward and makes the connecting channel communicate with the hydraulic cavity.

[0023] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure has a trigger slider with a blocking part and a communication hole, in the extended state of the trigger slider, the blocking part can block and seal the connecting channel; in the triggered state of the trigger slider, the connecting channel communicates through the communication hole.

[0024] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure has a trigger slider with a blocking part and a communication hole, in the extended state of the trigger slider, the blocking part can block and seal the connecting channel; in the triggered state of the trigger slider, the connecting channel communicates through the communication hole.

[0025] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure further comprises:

[0026] The punch electromagnetic valve is arranged on the pipeline through which the hydraulic source and the connecting channel communicate;

[0027] The pressure relief electromagnetic valve is arranged on the pipeline through which the hydraulic source and the pressure relief channel communicate.

[0028] For example, the straightening device for pipe production provided by at least one embodiment of the present disclosure has a trigger slider with a blocking part and a communication hole, in the extended state of the trigger slider, the blocking part can block and seal the connecting channel; in the triggered state of the trigger slider, the connecting channel communicates through the communication hole.

[0029] The embodiments of the present disclosure have the following beneficial effects:

[0030] In the present disclosure, support segments are arranged inside the pipe to provide internal support for the pipe, which can achieve better effects for thin-walled pipes, effectively avoid the problem of inward indentation caused by external force during straightening, reduce the risk of cross-section distortion and pipe wall rupture, and improve the pipe qualification rate. The hinged mode between the support segments enables them to adapt to pipes with different bending degrees, and can be flexibly combined according to the length and inner diameter of the pipe. The connection between the connecting rod and the fixing seat enables the support segments to be well restricted from moving and thus unable to support the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the description of the embodiments of the present disclosure will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present disclosure. Those skilled in the art can obtain other drawings according to the content of the example embodiments of the present disclosure and these drawings without any creative effort.

[0032] Figure 1 Fig. 1 is a schematic view of a three-dimensional structure of a straightening device for pipe production in an embodiment of the present disclosure;

[0033] Figure 2 Fig. 2 is a schematic view of a three-dimensional structure of a straightening device for pipe production in an embodiment of the present disclosure; Figure 1 Fig. 3 is a schematic view of a partial enlarged structure of Fig. 2;

[0034] Figure 3 Fig. 4 is a schematic view of a top structure of a straightening device for pipe production in an embodiment of the present disclosure; Figure 1 Fig. 5 is a schematic view of a top structure of a straightening device for pipe production in an embodiment of the present disclosure;

[0035] Figure 4 Fig. 6 is a schematic view of a partial section structure of Fig. 5; Figure 3 Fig. 7 is a schematic view of a partial section structure of Fig. 5;

[0036] Figure 5 Fig. 8 is a schematic view of a partial enlarged structure of Fig. 7; Figure 4 Fig. 9 is a schematic view of a partial enlarged structure of Fig. 7;

[0037] In the figure: straightening roller 100, support section 200, connecting rod 300, seat body 400, through hole 401, moving clamping piece 500, section body 210, guide groove 211, hydraulic cavity 212, connecting channel 213, pressure relief channel 214, sliding block 220, first elastic member 230, sliding support piece 240, hydraulic source 600, trigger assembly 700, trigger sliding block 710, blocking portion 711, communication hole 712, second elastic member 720, stamping electromagnetic valve 800, pressure relief electromagnetic valve 900. DETAILED DESCRIPTION

[0038] The present disclosure will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, but not to limit the present disclosure.

[0039] In order to make the drawing simple, only the parts related to the disclosure are schematically shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this text, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this document, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0041] In the present disclosure, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0042] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0043] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] As Figures 1-3 As shown in the figure, it shows a straightening device for pipe production in an embodiment of the present disclosure, which comprises a straightening roller 100, a support joint 200 and a connecting rod 300. The straightening roller 100 is arranged in sequence and forms a straightening space between them. The straightening space is used for pipe passing and straightening. The support joint 200 is hinged in sequence and is used to place in the pipe to support the pipe. One end of the connecting rod 300 is connected with one support joint 200 at the end, and the other end is used to be fixed, so as to limit the movement of the support joint 200.

[0045] For example, several straightening rollers 100 are arranged in sequence on the frame of the straightening device, and the distance between adjacent straightening rollers 100 is equal to the outer diameter of the pipe. The straightening rollers 100 are mounted on the roller seats of the frame through bearings. In order to ensure the stability of the straightening rollers 100 during high-speed rotation, high-precision tapered roller bearings capable of bearing large radial and axial loads are selected. In addition, the straightening rollers 100 are arranged in different directions, including horizontal and vertical directions, so that the pipe can be straightened from all directions.

[0046] Each support segment 200 can be attached to the inner wall of the pipe to provide uniform support and prevent scratching the inner wall of the pipe. A plurality of support segments 200 are connected in sequence and can flexibly bend inside the pipe to adapt to different degrees of bending deformation of the pipe, ensuring the continuity and stability of the entire support structure.

[0047] One end of the connecting rod 300 is connected to the center of one end support segment 200, and the other end is fixed to ensure that the connecting rod 300 and the support segment 200 do not move randomly. In order to adapt to pipes with different degrees of bending and folding, the connecting rod 300 can be designed to be flexible, such as a chain structure, to enter the pipe.

[0048] When the pipe passes through the straightening space formed by the straightening rollers 100, the straightening rollers 100 exert an external force on the pipe, causing plastic deformation of the pipe and achieving straightening.

[0049] The support segment 200 is placed inside the pipe to provide uniform support to the inner wall of the pipe. Since the support segments 200 are connected in a hinged manner, they can adapt to the curved shape of the pipe and prevent the pipe from collapsing when subjected to external forces from the straightening rollers 100, thereby avoiding cross-sectional distortion and pipe wall rupture.

[0050] One end of the connecting rod 300 is connected to the end support segment 200, and the other end is fixed to the frame through a fixed seat to exert a pulling force on the entire support segment 200 structure, limit the movement of the support segment 200, ensure the stability of the support segment 200 inside the pipe, and ensure that the support segment 200 continuously and effectively supports the pipe during straightening.

[0051] During pipe straightening, the support segment 200 connected by the connecting rod 300 is placed into one end of the pipe, allowing the support segment 200 to naturally stretch inside the pipe until it emerges from the other end. The straightening device is started, and the straightening rollers 100 are driven to rotate. The pipe with the support segment 200 is slowly fed into the straightening space, and the pipe undergoes plastic deformation along the straightening curve under the clamping and rolling of the straightening rollers 100. During the straightening process, the support segment 200 supports the inner wall of the pipe inside the pipe to prevent collapse. The operator observes the pipe straightening situation and adjusts the straightening roller 100 pressure and pipe conveying speed in a timely manner to ensure straightening accuracy.

[0052] The support section 200 is arranged inside the pipe, which provides internal support for the pipe, especially for thin-walled pipes, and can effectively avoid the problem of inward indentation caused by external force during straightening, reduce the risk of cross-section distortion and pipe wall rupture, and improve the pipe qualification rate.

[0053] The design and arrangement of the straightening roller 100, as well as the control of the pressure of the straightening roller 100 and the conveying speed of the pipe, ensure the straightening accuracy of the pipe. At the same time, the stable support of the support section 200 in the pipe makes the pipe plastically deform according to the expected straightening curve, further improving the straightening accuracy.

[0054] The hinged mode between the support sections 200 can adapt to pipes with different bending degrees, and can be flexibly combined according to the length and inner diameter of the pipe. The connection of the connecting rod 300 and the fixed seat makes the support section 200 be well limited from moving, avoiding the support effect of following the pipe movement.

[0055] In some examples, as shown in Figures 2-4 The seat body 400 is arranged on one side of the connecting rod 300, and the seat body 400 has a horizontal through hole 401, and the connecting rod 300 penetrates through the through hole 401, and the through hole 401 is used for the passage of the pipe.

[0056] For example, the seat body 400 is arranged on one side of the connecting rod 300 and connected with the rack of the straightening device, which ensures that displacement does not occur during work.

[0057] The seat body 400 has a horizontal through hole 401, and the diameter of the through hole 401 is designed according to the outer diameter of the pipe, which is generally larger than the outer diameter of the pipe to ensure smooth passage of the pipe.

[0058] The connecting rod 300 penetrates through the through hole 401, and the seat body 400 cooperates with the connecting rod 300 to assist the support of the support section 200, so as to limit the movement of the connecting rod 300. When the support section 200 is in the pipe, the connecting rod 300 remains stationary in the through hole 401, thereby supporting the pipe.

[0059] When the pipe passes through the straightening roller 100 for straightening, it can smoothly pass through the through hole 401, and during the straightening process, the support section 200 provides stable internal support for the pipe through the cooperation of the connecting rod 300 and the seat body 400, and works cooperatively with the external force of the straightening roller 100 to ensure the straightening effect of the pipe.

[0060] The through hole 401 on the seat body 400 provides a horizontal guide channel for the pipe material, so that the pipe material can maintain stable movement when entering and leaving the straightening space, avoiding affecting the straightening precision due to the shaking of the pipe material. At the same time, the connecting rod 300 penetrates through the through hole 401, and the seat body 400 supports the connecting rod 300, which assists the support node 200 to stably support the pipe material inside the pipe material, improving the reliability of the support.

[0061] The seat body 400 cooperates with the straightening roller 100, the support node 200 and the connecting rod 300. The position of the seat body 400 and the design of the through hole 401 match the arrangement of the straightening roller 100, ensuring the continuity of the movement of the pipe material during the straightening process. The cooperation of the connecting rod 300 and the seat body 400 is closely connected with the support of the support node 200 to the pipe material, which together ensures that the pipe material can receive uniform external force and stable internal support during the straightening process, thereby realizing high-precision straightening.

[0062] In some examples, as shown in Figure 2 The end of the connecting rod 300 close to the seat body 400 has a long hole 301, and the moving clamping piece 500 is slidingly arranged on the seat body 400 and can enter the through hole 401 and be inserted into the long hole 301 to limit the movement of the connecting rod 300 after moving.

[0063] For example, the end of the connecting rod 300 close to the seat body 400 is machined with a long hole 301, and the long hole 301 is opened along the axial direction of the connecting rod 300, thereby meeting the insertion requirement of the moving clamping piece 500.

[0064] The moving clamping piece 500 is in the shape of a long strip, which can be inserted into the long hole 301. The through hole 401 on the seat body 400 corresponds to the position of the long hole 301 of the connecting rod 300, ensuring that the moving clamping piece 500 can be smoothly inserted into the long hole 301 after entering the through hole 401. Moreover, the locking effect of the moving clamping piece 500 on the connecting rod 300 enhances the stability of the connecting rod 300 and the entire support node 200 system.

[0065] By sliding the moving clamping piece 500 on the seat body 400, it can enter the through hole 401 and be inserted into the long hole 301 of the connecting rod 300, ensuring that the support node 200 maintains a stable support state inside the pipe material, avoiding affecting the straightening effect of the pipe material due to accidental movement of the connecting rod 300.

[0066] In some examples, as shown in Figure 5As shown, the support segment 200 comprises a segment body 210, a sliding block 220 and a first elastic member 230. The segment body 210 has a guide groove 211 at one end, the sliding block 220 is slidingly arranged in the guide groove 211, the sliding block 220 is hinged to an adjacent segment body 210, and the first elastic member 230 acts on the groove wall of the guide groove 211 at one end and on the sliding block 220 at the other end, for providing a force for the sliding block 220 to slide outward in the guide groove 211.

[0067] For example, the segment body 210 can be cylindrical as a whole, with a diameter smaller than the inner diameter of the pipe, to ensure that it can be smoothly placed inside the pipe. The segment body 210 has a guide groove 211 machined at one end. The guide groove 211 is axially formed along the segment body 210 and is a rectangular groove.

[0068] The sliding block 220 is cuboid in shape and has a size suitable for the guide groove 211. A hinge hole is arranged on one side of the sliding block 220, and the sliding block 220 is hinged to a corresponding position of an adjacent segment body 210 through a pin shaft, to ensure the stability of the hinge and enable the adjacent segment bodies 210 to both rotate relative to each other and remain connected.

[0069] The first elastic member 230 can be a compression spring, which can provide sufficient elastic force to make the sliding block 220 have a tendency to slide outward in the guide groove 211.

[0070] The first elastic member 230 is installed in the guide groove 211, with one end abutting against the groove bottom wall surface of the guide groove 211 and the other end in close contact with the back surface of the sliding block 220. To ensure that the spring does not deviate or fall off during operation, a groove suitable for the outer diameter of the spring is arranged on the groove bottom of the guide groove 211 and on the back surface of the sliding block 220, respectively, and the two ends of the spring are respectively embedded in the grooves, to ensure the stability of the spring during compression and expansion.

[0071] When the pipe has a bending deformation, the adjacent segment bodies 210 will rotate relative to each other. In this process, the sliding block 220 slides outward in the guide groove 211 under the action of the first elastic member 230, so that the support segment 200 can better fit the curved shape of the inner wall of the pipe and provide more uniform and stable support force for the pipe. This self-adaptive adjustment function effectively avoids the problem of excessive local stress or uneven support of the support segment 200 when the bending curvature of the pipe is large, and improves the support effect during the pipe straightening process.

[0072] The first elastic element 230 not only provides the force for the sliding block 220 to slide outward, but also plays a role in buffering and shock absorption. During the pipe straightening process, the pipe is subjected to the impact force of the straightening roller 100 and the stress generated by its own deformation. The first elastic element 230 can absorb part of the impact force and stress, and reduce the impact of these forces on the support section 200 and the pipe through its own elastic deformation, protecting the structural integrity of the support section 200. At the same time, it also helps to improve the straightening quality of the pipe and avoid damage to the pipe due to stress concentration.

[0073] In some examples, such as Figure 5 As shown, the section 210 also has a hydraulic chamber 212, including a sliding support 240. The sliding support 240 is slidably disposed on the section 210, with one end protruding from the outer wall of the section 210 and the other end extending into the hydraulic chamber 212. It is used to be approached and supported by the hydraulic chamber 212 to support the inner wall of the pipe. The sliding support 240 is arranged in several circles, and the end protruding from the outer wall of the section 210 is cylindrical. The sliding support 240 has at least a pipe-supporting state and a retracted rotation state. When it is in the pipe-supporting state, the sliding support 240 slides outward under the hydraulic action of the hydraulic chamber 212 and supports the inner wall of the pipe. When it is in the retracted rotation state, the hydraulic chamber 212 is depressurized, and the sliding support 240 moves away from the inner wall of the pipe. The hydraulic source 600 is disposed on the seat 400 and is connected to the hydraulic chamber 212 through a flexible pipeline and a connecting channel 213. The connecting channel 213 is disposed on the section 210.

[0074] For example, the segment 210 is provided with a hydraulic cavity 212. On the segment 210, several connecting channels 213 are evenly distributed along the circumference. The connecting channel 213 is a circular channel. One end can be connected to the hydraulic cavity 212, and the other end leads to the outer wall of the segment 210 for connecting flexible pipelines to realize the connection between the hydraulic source 600 and the hydraulic cavity 212.

[0075] The end of the sliding support 240 is cylindrical. When in the support state, this end contacts the inner wall of the pipe and provides support. The other end of the sliding support 240 extends into the hydraulic chamber 212. Guide protrusions can be provided on both sides of the extended portion. Guide grooves are machined on the corresponding positions on the section body 210. The guide protrusions cooperate with the guide grooves to enable the sliding support 240 to slide smoothly on the section body 210, ensuring that it accurately approaches or moves away from the inner wall of the pipe under hydraulic action.

[0076] The sliding support members 240 are arranged in a circle around the axis of the section 210. The number of them is determined according to the diameter of the pipe and the support requirements. They are evenly distributed on the circumference of the section 210 to ensure uniform support for the inner wall of the pipe.

[0077] The hydraulic power source 600 is installed on one side of the base 400 and is fixedly connected to the base 400 by bolts to ensure that it will not shift during equipment operation. The hydraulic power source 600 has an oil outlet, which is connected to the connection channel 213 on the section 210 via a flexible pipeline. The flexible pipeline is made of high-pressure rubber tubing, which can withstand high hydraulic pressure and has a certain degree of flexibility to accommodate minor movements of the section 210 during equipment operation.

[0078] The hydraulic power source 600 is equipped with a pressure regulating valve and a pressure sensor. The pressure regulating valve can precisely adjust the output hydraulic pressure according to the material, diameter, and straightening process requirements of the pipe. The pressure sensor monitors the pressure in the hydraulic chamber 212 in real time and feeds the pressure signal back to the pressure regulating valve, realizing closed-loop control of the hydraulic pressure and ensuring that the sliding support 240 can provide appropriate support force according to actual needs.

[0079] The hydraulic source 600 supplies hydraulic oil to the hydraulic chamber 212 through flexible pipelines and connecting channels 213. The hydraulic oil acts on the end of the sliding support 240 that extends into the hydraulic chamber 212, causing it to slide outward under the guidance of the guide protrusion and guide groove, entering the pipe-supporting state and supporting the inner wall of the pipe. According to the different specifications of the pipe and the actual stress during the straightening process, the supporting force of the sliding support 240 on the inner wall of the pipe can be controlled by adjusting the output pressure of the hydraulic source 600, achieving adaptive adjustment and effectively avoiding problems such as pipe sagging or insufficient straightening accuracy caused by excessive or insufficient supporting force.

[0080] When pipe straightening is required, the hydraulic source 600 pressurizes the hydraulic chamber 212, causing the sliding support 240 to quickly enter the pipe-supporting state, providing support for the pipe. After straightening is completed, the hydraulic source 600 depressurizes, and the sliding support 240 retracts to the retracted state under its own weight or the action of the return spring, facilitating the removal of the support section 200 from the pipe. This achieves convenient switching of the working state of the sliding support 240 and improves the operating efficiency of the equipment.

[0081] In some examples, such as Figure 5 As shown, the system also includes a trigger assembly 700 and a second elastic element 720. The trigger assembly 700 includes a trigger slider 710, which is slidably disposed on the section 210. After sliding, it can seal the connecting channel 213. The sliding direction of the trigger slider 710 is parallel to the sliding direction of the sliding support 240. One end protrudes from the outer wall of the section 210. The trigger slider 710 is closer to the connecting rod 300 than the sliding support 240 and can be pushed and slid by the recessed inner wall of the tube. One end of the second elastic element 720 acts on the trigger slider 710, and the other end acts on the section 210, providing a force for the trigger slider 710 to slide outward and seal the connecting channel 213.

[0082] The trigger slider 710 has at least an extended state and a triggered state. In the extended state, the trigger slider 710 slides outward and seals the connecting channel 213. In the triggered state, the trigger slider 710 slides inward and connects the connecting channel 213 with the hydraulic cavity 212.

[0083] For example, the trigger slider 710 is in the shape of a cuboid and can slide smoothly on the section body 210. One end of the trigger slider 710 protrudes from the outer wall of the section body 210, facilitating contact with the inner wall of the pipe. The sliding direction of the trigger slider 710 is parallel to the sliding direction of the sliding support 240 and closer to the connecting rod 300 than the sliding support 240.

[0084] On both sides of the trigger slider 710, a guide protrusion can be arranged, and a corresponding guide groove is processed on the section body 210. The guide protrusion and the guide groove cooperate to ensure that the trigger slider 710 does not deviate during sliding and always maintains accurate alignment with the connecting channel 213.

[0085] The second elastic member 720 can be a tension spring or a compression spring, and different springs can be selected for corresponding installation methods. One end of the second elastic member 720 is fixed to the end of the trigger slider 710, and the other end is fixed to a fixed column inside the section body 210.

[0086] The trigger slider 710 is installed on the section body 210 and cooperates with the sliding support 240. The position of the trigger slider 710 is designed so that it does not affect the work of the sliding support 240 when the pipe is normally straightened. When the pipe is internally collapsed and the inner wall contacts and pushes the trigger slider 710 to slide, the connection state of the connecting channel 213 and the hydraulic cavity 212 is changed, thereby affecting the support force of the sliding support 240.

[0087] The action of the trigger slider 710 directly controls the connection between the connecting channel 213 and the hydraulic cavity 212. Under normal circumstances, the trigger slider 710 seals the connecting channel 213, and the hydraulic oil output by the hydraulic source 600 cannot enter the hydraulic cavity 212, so the sliding support 240 does not need to provide a support force. When the trigger slider 710 enters the triggered state, the connecting channel 213 is connected with the hydraulic cavity 212, and the hydraulic source 600 can further adjust the pressure in the hydraulic cavity 212 according to the actual situation to change the support force of the sliding support 240.

[0088] During the pipe straightening process, if the pipe is internally collapsed, the inner wall of the internally collapsed pipe will contact the end of the trigger slider 710 protruding from the outer wall of the section body 210 and push the trigger slider 710 to slide inward against the tension of the second elastic member 720. The sliding of the trigger slider 710 connects the connecting channel 213 with the hydraulic cavity 212, thereby triggering the hydraulic source 600 to adjust the pressure in the hydraulic cavity 212 and change the support force of the sliding support 240 to cope with the pipe collapse and prevent the collapse from further worsening.

[0089] The design of the trigger assembly 700 realizes automatic monitoring and response to pipe indentation. Through the cooperation of the trigger slider 710 and the second elastic member 720, the support force of the sliding support 240 can be adjusted in time to protect the pipe from being damaged due to excessive extrusion and ensure the smooth progress of the straightening process. This automatic adjustment mechanism improves the device's ability to respond to sudden situations during pipe straightening, enhancing the stability and reliability of the device.

[0090] The trigger assembly 700 can monitor whether the pipe is indented in real time and respond quickly when indentation is found, automatically adjusting the support force of the sliding support 240 to effectively prevent pipe damage due to indentation, improving the success rate and quality of pipe straightening.

[0091] Through the automatic adjustment mechanism, the device can better respond to sudden indentation during pipe straightening, avoiding equipment failure or straightening interruption due to indentation, enhancing the stability and reliability of the device during the entire straightening process.

[0092] The device can adjust the support force in time according to the pipe indentation, further optimizing the pipe straightening process, allowing the device to adapt to more complex pipe straightening requirements and expanding the device's application range.

[0093] In some examples, as shown in FIG. 7B, the trigger slider 710 has a blocking portion 711 and a communication hole 712. When the trigger slider 710 is in the extended state, the blocking portion 711 can block and seal the connection channel 213. When the trigger slider 710 is in the triggered state, the connection channel 213 is connected through the communication hole 712. Figure 5 For example, the blocking portion 711 is located on one side of the trigger slider 710. When the trigger slider 710 is in the extended state, the blocking portion 711 can block the opening of the connection channel 213, forming a seal to prevent hydraulic oil leakage.

[0094] The communication hole 712 can be a circular through hole that penetrates the main body of the trigger slider 710, and its axis is on the same straight line as the axis of the connection channel 213. When the trigger slider 710 enters the triggered state due to pipe indentation, the connection channel 213 is connected to the hydraulic chamber 212 through the communication hole 712.

[0095]

[0096] ​By the design of the blocking part 711 and the communication hole 712, the sealing and communication control of the connecting channel 213 by the trigger slider 710 are realized. In the extended state, the blocking part 711 effectively seals the connecting channel 213, preventing hydraulic oil from entering the hydraulic cavity 212, and ensuring that the sliding support 240 stably supports the pipe under the initial set pressure. When the pipe is indented to push the trigger slider 710 into the triggered state, the communication hole 712 is aligned with the connecting channel 213, allowing the hydraulic source 600 to enter the hydraulic cavity 212, thereby changing the support force of the sliding support 240 to cope with the pipe indentation.

[0097] The elastic force provided by the second elastic member 720 keeps the trigger slider 710 in the extended state without external force, and the external force generated by the pipe indentation can overcome the spring force to push the trigger slider 710 to slide and trigger the pressure adjustment of the hydraulic system. This self-adaptive adjustment mechanism enables the device to adjust the support force of the sliding support 240 in real time according to the actual deformation of the pipe, effectively preventing the pipe from being damaged due to indentation, and ensuring the smooth progress of the straightening work.

[0098] In some examples, as shown in FIG. 11, the segment body 210 also has a pressure relief channel 214 that communicates with the hydraulic cavity 212 and leads to the hydraulic source 600 through a flexible pipe. Figure 5

[0099] For example, the pressure relief channel 214 can be a circular channel, which can be led out from the side of the hydraulic cavity 212, along the internal structure of the segment body 210, and finally out from one end of the segment body 210.

[0100] The position of the pressure relief channel 214 is designed taking into full consideration the overall structure of the segment body 210 and the compatibility with other components. It is kept at a certain distance from components such as the connecting channel 213 and the trigger slider 710 to avoid mutual interference. At the same time, the outlet position of the pressure relief channel 214 is close to the end of the segment body 210 connected to the connecting rod 300, which is more convenient for connecting the flexible pipe, and does not affect the normal work of other components during the pipe straightening process.

[0101] Strengthening structure: Due to the existence of the pressure relief channel 214, the structural strength of the segment body 210 in this area may be affected to some extent. Therefore, an annular reinforcing rib is arranged around the pressure relief channel 214 inside the segment body 210.

[0102] The flexible pipe for connecting the pressure relief channel 214 and the hydraulic source 600 is made of high-pressure rubber pipe, which has good flexibility and pressure resistance and can withstand the high pressure during the operation of the hydraulic system, while adapting to the slight movement of the segment body 210 inside the pipe.

[0103] ​The pressure relief channel 214 provides an additional pressure release path for the hydraulic cavity 212. During the pipe straightening process, the pressure in the hydraulic cavity 212 may fluctuate or be too high due to various factors. Through the pressure relief channel 214, the excessive pressure can be returned to the hydraulic source 600 in time to avoid damage to the pipe and the sliding support 240 due to excessive pressure, thereby protecting the pipe and the equipment. At the same time, after the straightening is completed, the pressure relief channel 214 can quickly reduce the pressure in the hydraulic cavity 212 to facilitate the resetting of the sliding support 240 and improve the operating efficiency of the equipment.

[0104] The communication between the pressure relief channel 214 and the hydraulic source 600 forms a closed-loop pressure regulation system for the entire hydraulic system. The hydraulic source 600 can accurately adjust the pressure in the hydraulic cavity 212 through the pressure relief channel 214 according to the actual situation of the pipe and the feedback of the trigger assembly 700, ensuring that the supporting force of the sliding support 240 is always at an appropriate level, thereby improving the stability and reliability of the entire pipe straightening device during the working process.

[0105] In some examples, a punch solenoid valve 800 and a pressure relief solenoid valve 900 are also included. The punch solenoid valve 800 is arranged on the pipeline connecting the hydraulic source 600 and the connection channel 213, and the pressure relief solenoid valve 900 is arranged on the pipeline connecting the hydraulic source 600 and the pressure relief channel 214.

[0106] For example, as shown in FIG. 8, the punch solenoid valve 800 is installed on the pipeline connecting the hydraulic source 600 and the connection channel 213, and is located close to the hydraulic source 600. It is connected to the pipeline through a standard flange connection to ensure the sealing and stability of the connection. Figure 2

[0107] The punch solenoid valve 800 can adopt a two-position three-way structure. When the punch solenoid valve 800 is in the open state, the hydraulic oil output by the hydraulic source 600 can smoothly enter the hydraulic cavity 212 through the connection channel 213 to push the sliding support 240 to extend and support the inner wall of the pipe. When it is in the closed state, the passage of the hydraulic oil is cut off, and the pressure in the hydraulic cavity 212 remains stable.

[0108] The pressure relief solenoid valve 900 is arranged on the pipeline connecting the hydraulic source 600 and the pressure relief channel 214, and is also connected to the pipeline through a flange connection. The pressure relief solenoid valve 900 is installed close to the hydraulic source 600 to better control the process of returning the hydraulic oil from the hydraulic cavity 212 to the hydraulic source 600 through the pressure relief channel 214.

[0109] The pressure relief solenoid valve 900 can be a two-position two-way structure. When the pressure in the hydraulic cavity 212 is too high or the sliding support 240 needs to change from the pipe supporting state to the retracted state, the excess pressure is released in time to avoid damage to the pipe and the equipment. ​

[0110] The installation of the stamping solenoid valve 800 and the pressure relief solenoid valve 900 enables precise control of the pressure within the hydraulic chamber 212. The stamping solenoid valve 800 controls the flow and pressure of the hydraulic oil entering the hydraulic chamber 212, allowing the sliding support 240 to provide appropriate support force according to the actual needs of the pipe. The pressure relief solenoid valve 900 promptly releases pressure when the pressure in the hydraulic chamber 212 is too high, ensuring that the pressure remains within a safe and appropriate range. These two valves work together to ensure that the hydraulic system operates stably and efficiently at different stages of pipe straightening, meeting the process requirements of pipe straightening.

[0111] In some examples, such as Figure 2 , Figure 5 As shown, the hydraulic chambers 212 on several sections 210 are connected in sequence through flexible pipes and connecting channels 213, and also in sequence through flexible pipes and pressure relief channels 214.

[0112] For example, the hydraulic chambers 212 on several sections 210 are sequentially connected via flexible pipes and connecting channels 213. The flexible pipes are made of high-pressure resistant and wear-resistant rubber tubing, with an inner diameter adapted to the diameter of the connecting channels 213. Both ends of each flexible pipe section are connected to the connecting channels 213 of the adjacent section 210 via metal connectors. The metal connectors and connecting channels 213 are threaded together, and sealing gaskets are used to ensure a tight seal and prevent hydraulic oil leakage. This connection method allows the hydraulic oil output from the hydraulic source 600 to flow sequentially through the hydraulic chambers 212 of each section 210, providing uniform support force to the sliding support members 240 on each section 210.

[0113] Similarly, the hydraulic chamber 212 on the segment 210 is also connected sequentially via a flexible conduit and a pressure relief channel 214. The flexible conduit used for connecting the pressure relief channel 214 is also made of high-pressure resistant rubber, with an inner diameter matching the diameter of the pressure relief channel 214. The connection method is similar to that of the connecting channel 213, using metal joints and sealing gaskets to ensure a secure and well-sealed connection. This connection layout ensures that when the pressure in the hydraulic chamber 212 is too high, excess hydraulic oil can flow back to the hydraulic source 600 sequentially through the pressure relief channel 214 and the flexible conduit, achieving pressure balance and stability throughout the hydraulic system.

[0114] By sequentially connecting the hydraulic chambers 212 on several sections 210 through connecting channels 213, hydraulic oil flows from the hydraulic source 600 through each hydraulic chamber 212 in sequence, ensuring that the hydraulic pressure on the sliding support 240 on each section 210 is basically the same, thereby providing uniform support force to the inner wall of the pipe. This uniform support force distribution helps improve the straightening accuracy of the pipe and avoids problems such as deformation or indentation of the pipe due to uneven local support force.

[0115] The hydraulic cavity 212 is connected in sequence through the pressure relief channel 214, so that the whole hydraulic system forms a unified pressure regulation network. The unified regulation of the pressure of the whole system enhances the stability of the hydraulic system and improves the reliability of the equipment in the pipe straightening process.

[0116] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present disclosure can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present disclosure, which should be covered in the scope of the claims of the present disclosure.

Claims

1. A straightening device for pipe production, characterized in that, The utility model relates to a straightening device for pipe, which comprises: a plurality of straightening rollers (100) arranged in sequence and forming a straightening space between them for pipe to pass through and be straightened; a plurality of support segments (200) arranged in sequence and placed in the pipe to support the pipe; a connecting rod (300) connected to one of the support segments (200) at one end and fixed at the other end to limit the movement of the support segments (200); each of the support segments (200) comprises: a segment body (210) having a guide groove (211) at one end; a sliding block (220) slidingly arranged in the guide groove (211) and hingedly connected to another adjacent segment body (210); a first elastic member (230) acting on the groove wall of the guide groove (211) at one end and acting on the sliding block (220) at the other end to provide a force for the sliding block (220) to slide outward in the guide groove (211); wherein the segment body (210) further has a hydraulic chamber (212), and further comprises: a plurality of sliding support members (240) slidingly arranged on the segment body (210) and protruding out of the outer wall of the segment body (210) at one end and extending into the hydraulic chamber (212) at the other end to be acted on by the hydraulic chamber (212) so as to approach and support the inner wall of the pipe, the sliding support members (240) being arranged in a circle, the end portion protruding out of the outer wall of the segment body (210) being in a cylindrical shape, the sliding support members (240) having at least a supporting pipe state and a retracted state, in the supporting pipe state, the sliding support members (240) slide outward under the hydraulic action of the hydraulic chamber (212) and support the inner wall of the pipe, in the retracted state, the hydraulic chamber (212) is depressurized, and the sliding support members (240) move away from the inner wall of the pipe; a hydraulic source (600) connected to the hydraulic chamber (212) through a flexible pipeline and a connecting channel (213) arranged on the segment body (210); and further comprising a triggering assembly (700) comprising: a triggering sliding block (710) slidingly arranged on the segment body (210) and capable of sealing the connecting channel (213) after sliding, the sliding direction of the triggering sliding block (710) being parallel to the sliding direction of the sliding support members (240), one end of the triggering sliding block (710) protruding out of the outer wall of the segment body (210), the triggering sliding block (710) being closer to the connecting rod (300) than the sliding support members (240) and capable of being pushed and slid by the inner wall of the pipe; a second elastic member (720) acting on the triggering sliding block (710) at one end and acting on the segment body (210) at the other end to provide a force for the triggering sliding block (710) to slide outward and seal the connecting channel (213). The trigger slider (710) has at least an extended state and a triggered state, in the extended state, the trigger slider (710) slides outward and seals the connecting channel (213); in the triggered state, the trigger slider (710) slides inward and makes the connecting channel (213) communicate with the hydraulic cavity (212).

2. The straightening device for pipe production according to claim 1, characterized in that Further comprising: The seat body (400) is arranged on one side of the connecting rod (300), the seat body (400) has a horizontal through hole (401), the connecting rod (300) penetrates the through hole (401), and the through hole (401) is used for the passing of a pipe.

3. The straightening device for pipe production according to claim 2, characterized in that The connecting rod (300) has a long hole (301) at one end close to the seat body (400), and further comprising: The moving clamping piece (500) is arranged on the seat body (400) and can enter the through hole (401) and be inserted into the long hole (301) after moving, so as to limit the movement of the connecting rod (300).

4. The straightening device for pipe production according to claim 3, characterized in that The hydraulic source (600) is arranged on the seat body (400).

5. The straightening device for pipe production according to claim 4, characterized in that The trigger slider (710) has a blocking portion (711) and a communication hole (712), when the trigger slider (710) is in the extended state, the blocking portion (711) can block and seal the connecting channel (213), and when the trigger slider (710) is in the triggered state, the connecting channel (213) communicates through the communication hole (712).

6. The straightening device for pipe production according to claim 5, characterized in that The joint body (210) further has a pressure relief channel (214) which communicates with the hydraulic cavity (212) and leads to the hydraulic source (600) through a flexible pipeline.

7. The straightening device for pipe production according to claim 6, characterized in that Further comprising: The punch electromagnetic valve (800) is arranged on a pipeline through which the hydraulic source (600) and the connecting channel (213) communicate; The pressure relief electromagnetic valve (900) is arranged on a pipeline through which the hydraulic source (600) and the pressure relief channel (214) communicate.

8. The straightening device for pipe production according to claim 7, characterized in that The hydraulic cavities (212) on the plurality of joint bodies (210) are connected in sequence through flexible pipelines and connecting channels (213) and are also connected in sequence through flexible pipelines and pressure relief channels (214).

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