Socket and spigot joint forming equipment for socket and spigot joint type flexible connector steel pipe

Abstract

The utility model relates to the technical field of steel pipe interface forming equipment, in particular to socket type flexible interface steel pipe socket forming equipment, which is characterized in that each outer side forming module is driven by an outer side forming driving mechanism to synchronously move towards the inner side along the radial direction of an outer side annular bracket; the inner side forming driving mechanism drives the inner side forming modules to synchronously move towards the outer side in the radial direction of the inner side annular support, so that the steel pipe is subjected to one-time press-fit forming in the connector forming cavity between the inner side forming modules and the outer side forming modules. Corresponding outlines of the inner side forming module and the outer side forming module can be customized according to actual needs, rapid forming of complex socket connectors of different structures can be met, operation is easy, and the forming efficiency is high.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe joint forming equipment, specifically a socket-type flexible joint steel pipe socket forming equipment. Background Technology

[0002] To facilitate long-distance transportation by connecting steel pipes, socket-type steel pipes have emerged. One end of a socket-type steel pipe has a socket, and the other end has a spigot. When forming a transportation pipeline, the spigot of the first steel pipe is inserted into the socket of the second steel pipe, achieving convenient connection. As shown in the patent announcement CN110871242B concerning "Manufacturing Apparatus and Method for Socket-Type Steel Pipe Sockets," existing socket-type steel pipe socket forming equipment uses an upper roller mechanism and a lower roller mechanism to form a socket groove. A drive mechanism drives the upper roller mechanism to rotate, causing the steel pipe and the lower roller mechanism to rotate, forming a socket at one end of the steel pipe under the pressure of the socket groove. This equipment forms the socket through rotational groove pressing, which is suitable for simple socket structures. However, for complex sockets with multiple inner diameters and uneven surfaces, it is difficult to form or requires multiple adjustments of the groove for pressing, making operation cumbersome. Furthermore, rotational groove pressing takes a long time and has low production efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a socket-type flexible joint steel pipe socket forming equipment, which solves the problems of cumbersome operation and low production efficiency caused by the need for multiple adjustments of the pressure groove for pressing when handling complex socket joint forming equipment.

[0004] To solve the above problems, the present invention provides the following technical solution:

[0005] A socket-type flexible joint steel pipe socket forming device includes an outer socket forming device and an inner socket forming device. The outer socket forming device includes an outer annular support, an outer forming module, and an outer forming drive mechanism. The outer forming module is coaxial with the outer annular support and includes several outer forming modules arranged in a circumferential array along the outer annular support. The outer forming drive mechanism is connected to the outer forming module to drive each outer forming module to move synchronously inward or outward along the radial direction of the outer annular support. The inner socket forming device... The molding device includes an inner annular support, an inner molding module, and an inner molding drive mechanism. The inner molding module is disposed inside the outer molding module to form an interface molding cavity between the inner molding module and the outer molding module. The inner molding module, the outer molding module, and the inner annular support are coaxial. The inner molding module includes a plurality of inner molding modules arranged in a circumferential array along the inner annular support. The inner molding drive mechanism is connected to the inner molding module to drive each inner molding module to move synchronously inward along the radial direction of the inner annular support or synchronously outward along the radial direction of the inner annular support.

[0006] As described above, the socket forming equipment for flexible joint steel pipes includes an outer forming drive mechanism comprising an outer forming drive seat and an outer forming drive assembly. The outer forming drive seat is located on the outside of the outer forming module and is coaxially connected to the outer forming module. The inner side of the outer forming drive seat has an inner conical surface, and the outer side of the outer forming module has an outer conical surface that mates with the inner conical surface of the drive seat. The outer forming drive assembly connects the outer forming drive seat to the outer annular support, thereby driving the outer forming drive seat to move axially relative to the outer annular support and causing each of the outer forming modules to move synchronously radially along the outer annular support.

[0007] As described above, the socket forming equipment for flexible joint steel pipes includes an outer forming drive mechanism comprising an outer drive guide assembly. The outer drive guide assembly includes a sleeve and a guide post fitted inside the sleeve. The sleeve is fixedly connected to either the outer forming drive seat or the outer annular support, and the guide post is fixedly connected to the other of the outer forming drive seat and the outer annular support.

[0008] As described above, a socket-type flexible joint steel pipe socket forming device is provided with an outer conical surface mating structure between the outer forming drive seat and the outer forming module. The outer conical surface mating structure includes an outer second sliding groove extending along the extension direction of the outer conical surface of the module and an outer second sliding block mating with the outer second sliding groove. The outer second sliding groove is provided on either the outer forming drive seat or the outer forming module, and the outer second sliding block is provided on the other one of the outer forming drive seat and the outer forming module.

[0009] An outer radial fitting structure is provided between the outer annular support and the outer molding module. The outer radial fitting structure includes an outer first sliding groove extending radially along the outer annular support and an outer first sliding block that fits with the outer first sliding groove. The outer first sliding groove is provided on either the outer annular support or the outer molding module, and the outer first sliding block is provided on the other of the outer annular support and the outer molding module.

[0010] As described above, a socket-type flexible joint steel pipe socket forming device includes an inner forming drive mechanism comprising an inner forming cone and an inner forming drive assembly. The inner forming cone is located inside the inner forming module and coaxially connected to it. The outer side of the inner forming cone has an outer conical surface, and the inner side of the inner forming module has an inner conical surface that mates with the outer conical surface. The inner forming drive assembly connects the inner forming cone to the inner annular support, thereby driving the inner forming cone to move axially relative to the inner annular support and causing each inner forming module to move synchronously radially along the inner annular support.

[0011] As described above, a socket-type flexible joint steel pipe socket forming device is provided with an inner conical surface mating structure between the inner forming cone and the inner forming module. The inner conical surface mating structure includes an inner second sliding groove extending along the extending direction of the outer conical surface of the cone and an inner second sliding block mating with the inner second sliding groove. The inner second sliding groove is provided on either the inner forming cone or the inner forming module, and the inner second sliding block is provided on the other one of the inner forming cone and the inner forming module.

[0012] An inner radial fitting structure is provided between the inner annular bracket and the inner molding module. The inner radial fitting structure includes an inner first sliding groove extending radially along the inner annular bracket and an inner first sliding block that fits with the inner first sliding groove. The inner first sliding groove is provided on either the inner annular bracket or the inner molding module, and the inner first sliding block is provided on the other of the outer annular bracket and the outer molding module.

[0013] The socket forming equipment for flexible joint steel pipes as described above further includes a transfer device. The transfer device includes a transfer guide rail, a transfer slide, and a transfer drive assembly. The length direction of the transfer guide rail is parallel to the axial direction of the outer annular support. The transfer slide is movably mounted on the transfer guide rail and connected to the outer forming device of the socket. The transfer drive assembly is connected to the transfer slide to drive the transfer slide to move the outer forming device of the socket along the transfer guide rail.

[0014] The socket forming equipment for flexible joint steel pipes described above further includes a lifting device. The lifting device includes a lifting connecting seat, a lifting screw, and a lifting drive assembly. The lifting connecting seat connects the lifting screw and the inner forming device of the socket. The lifting drive assembly is connected to the lifting screw to drive the lifting screw to move the inner forming device of the socket up and down.

[0015] The socket forming equipment for flexible joint steel pipes described above further includes a rotating device, which is connected to the inner forming device of the socket joint to drive the inner forming device of the socket joint to rotate relative to the outer forming device of the socket joint.

[0016] As described above, the socket forming equipment for flexible steel pipes includes an inner forming module comprising a plurality of inner transition modules arranged in a circumferential array along the inner annular support. The inner transition modules are located inside the inner forming module and are connected to the inner forming module.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This utility model provides a socket-type flexible interface steel pipe socket forming equipment. An outer forming drive mechanism drives each outer forming module to move synchronously inward along the radial direction of the outer annular support, while an inner forming drive mechanism drives each inner forming module to move synchronously outward along the radial direction of the inner annular support. This allows the steel pipe to undergo a single compression forming process within the interface forming cavity between the inner and outer forming modules. The inner and outer forming modules can be customized with corresponding contours according to actual needs, enabling rapid forming of complex socket interfaces with different structures. The equipment is simple to operate and has high forming efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a socket-type flexible interface steel pipe socket forming equipment according to an embodiment of the present utility model.

[0021] Figure 2 This is a partial structural diagram of a socket-type flexible joint steel pipe socket forming device according to an embodiment of the present invention. Figure 1 .

[0022] Figure 3 This is a partial structural diagram of a socket-type flexible joint steel pipe socket forming device according to an embodiment of the present invention. Figure 2 .

[0023] Figure 4 This is an exploded view of the inner forming device of the socket interface of a socket-type flexible joint steel pipe socket forming equipment according to an embodiment of the present utility model.

[0024] Figure 5 This is a schematic diagram of the connection structure of the outer forming device and the transfer device of a socket-type flexible interface steel pipe socket forming equipment according to an embodiment of the present invention.

[0025] Figure 6 This is an exploded view of the outer forming device of the socket interface of a socket-type flexible joint steel pipe socket forming equipment according to an embodiment of the present utility model.

[0026] Figure 7 This is a schematic diagram of the transfer device of a socket-type flexible interface steel pipe socket forming equipment according to an embodiment of the present utility model.

[0027] The corresponding numbers for the attached figures are as follows:

[0028] 1. Outer forming device for socket interface; 11. Outer annular support; 12. Outer forming module; 121. Outer conical surface of module; 13. Outer forming drive seat; 131. Inner conical surface of drive seat; 14. Outer forming drive assembly; 15. Outer drive guide assembly; 151. Sleeve; 152. Guide post; 171. Outer first slide groove; 172. Outer first slider; 181. Outer second slide groove; 182. Outer second slider; 2. Inner forming device for socket interface; 21. Inner annular support; 22. Inner forming module; 2201. Inner forming module; 2202. Inner... Transition module; 221, Inner conical surface of the module; 23, Inner forming cone; 231, Outer conical surface of the cone; 24, Inner forming drive assembly; 271, Inner first slide groove; 272, Inner first slider; 281, Inner second slide groove; 282, Inner second slider; 3, Frame; 4, Transfer device; 41, Transfer guide rail; 42, Transfer slide block; 43, Transfer drive assembly; 431, Transfer drive motor; 432, Transfer lead screw; 433, Transfer nut; 5, Lifting device; 51, Lifting connecting seat; 52, Lifting lead screw; 53, Lifting drive assembly; 6, Rotation device. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see the appendix Figure 1 To be continued Figure 7This embodiment provides a socket forming device for flexible joint steel pipes, including a frame 3. The frame 3 is equipped with an outer socket forming device 1 and an inner socket forming device 2. The outer socket forming device 1 includes an outer annular support 11, an outer forming module 12, and an outer forming drive mechanism. The outer forming module 12 is coaxial with the outer annular support 11 and includes several outer forming modules arranged circumferentially along the outer annular support 11. The outer forming drive mechanism is connected to the outer forming module 12 to drive each outer forming module to move synchronously inward or outward along the radial direction of the outer annular support 11. The inner socket forming device 2... The molding device 2 includes an inner annular support 21, an inner molding module 22, and an inner molding drive mechanism. The inner molding module 22 is disposed inside the outer molding module 12 to form an interface molding cavity between the inner molding module 22 and the outer molding module 12. The inner molding module 22 is coaxial with the outer molding module 12 and the inner annular support 21. The inner molding module 22 includes a plurality of inner molding modules 2201 arranged in a circumferential array along the inner annular support 21. The inner molding drive mechanism is connected to the inner molding module 22 to drive each inner molding module 2201 to move synchronously inward along the radial direction of the inner annular support 21 or synchronously outward along the radial direction of the inner annular support 21. This embodiment provides a socket-type flexible interface steel pipe socket forming device. An outer forming drive mechanism drives each of the outer forming modules to move synchronously inward along the radial direction of the outer annular support 11. An inner forming drive mechanism drives each of the inner forming modules 2201 to move synchronously outward along the radial direction of the inner annular support 21. This allows the steel pipe to undergo a single compression forming process within the interface forming cavity between the inner forming module 22 and the outer forming module 12. The inner forming module 22 and the outer forming module 12 can be customized with corresponding contours according to actual needs, enabling rapid forming of complex socket interfaces with different structures. The device is simple to operate and has high forming efficiency.

[0031] The outer forming drive mechanism can be implemented in a variety of ways.

[0032] In some embodiments, the outer forming drive mechanism includes a plurality of hydraulic cylinders mounted on the outer annular support 11. The plurality of hydraulic cylinders extend radially along the outer annular support 11 and are connected to the outer forming modules one by one. The fixed end of the hydraulic cylinder is fixedly connected to the outer annular support 11, and the telescopic end of the hydraulic cylinder is connected to the outer forming module 12. Each hydraulic cylinder drives the corresponding outer forming module to move independently. This driving method is costly and requires high precision from the hydraulic cylinders.

[0033] Preferably, in some embodiments, the outer molding drive mechanism includes an outer molding drive seat 13 and an outer molding drive assembly 14. The outer molding drive seat 13 is located on the outside of the outer molding module 12 and coaxially connected to it. The inner side of the outer molding drive seat 13 is provided with an inner cone surface 131, and the outer side of the outer molding module 12 is provided with an outer cone surface 121 that mates with the inner cone surface 131. The outer molding drive assembly 14 connects the outer molding drive seat 13 and the outer annular support 11 to drive the outer molding drive seat 13 to move axially relative to the outer annular support 11 and to drive each of the outer molding modules to move synchronously radially along the outer annular support 11. The outer molding drive seat 13 is annular. Since the outer molding module 12 is connected to the outer molding drive seat 13, each of the outer molding modules in the outer molding module 12 is simultaneously pushed by the outer molding drive seat 13 during movement, easily achieving synchronous movement of each outer molding module. When the outer forming drive assembly 14 drives the outer forming drive seat 13 to move axially closer to the outer annular support 11, the inner conical surface 131 of the drive seat interacts with the outer conical surface 121 of the module, thereby causing each of the outer forming modules to move radially inward along the outer annular support 11, resulting in the outer forming module 12 exhibiting an overall contraction tendency, so as to apply external pressure to the steel pipe in the interface forming cavity to promote the forming of the steel pipe; when the outer forming drive assembly 14 drives the outer forming drive seat 13 to move axially away from the outer annular support 11, the inner conical surface 131 of the drive seat interacts with the outer conical surface 121 of the module, thereby causing each of the outer forming modules to move radially outward along the outer annular support 11, resulting in the outer forming module 12 exhibiting an overall expansion tendency, so as to facilitate the forming of the steel pipe from the outer forming module 12.

[0034] The outer molding drive assembly 14 includes an outer driving hydraulic cylinder, and several outer molding drive assemblies 14 are arranged in a circumferential array along the outer molding drive base 13. This provides good driving effect and facilitates the synchronous movement of each outer molding module in the outer molding module 12.

[0035] Furthermore, the outer molding drive mechanism includes an outer drive guide assembly 15, which includes a sleeve 151 and a guide post 152 fitted inside the sleeve 151. The sleeve 151 is fixedly connected to either the outer molding drive seat 13 or the outer annular support 11, and the guide post 152 is fixedly connected to the other of the outer molding drive seat 13 and the outer annular support 11. When the outer molding drive assembly 14 drives the outer molding drive seat 13 to move axially relative to the outer annular support 11, the guide post 152 moves relative to the sleeve 151, thereby providing guidance for the axial movement of the outer molding drive seat 13 relative to the outer annular support 11. This makes the axial movement of the outer molding drive seat 13 relative to the outer annular support 11 smoother and more stable, which is beneficial for driving the synchronous movement of each outer molding module in the outer molding module 12.

[0036] Preferably, a plurality of the outer drive guide components 15 are arranged in a circumferential array along the outer forming drive seat 13. This provides good guiding effect and facilitates smoother and more stable axial movement of the outer forming drive seat 13 relative to the outer annular support 11.

[0037] Furthermore, an outer conical surface mating structure is provided between the outer molding drive seat 13 and the outer molding module 12. The outer conical surface mating structure includes an outer second slide groove 181 extending along the extension direction of the outer conical surface 121 of the module and an outer second slider 182 mating with the outer second slide groove 181. The outer second slide groove 181 is provided on either the outer molding drive seat 13 or the outer molding module 12, and the outer second slider 182 is provided on the other one of the outer molding drive seat 13 and the outer molding module 12. On the one hand, the outer molding drive seat 13 and the outer molding module 12 are connected by the cooperation of the outer second slide groove 181 and the outer second slider 182, preventing the outer molding module 12 from detaching from the outer molding drive seat 13. On the other hand, the cooperation of the outer second slide groove 181 and the outer second slider 182 provides guidance and limiting for the relative movement of the outer molding drive seat 13 and the outer molding module 12, making the relative movement of the outer molding drive seat 13 and the outer molding module 12 more stable, smooth and precise.

[0038] Furthermore, an outer radial engagement structure is provided between the outer annular support 11 and the outer molding module 12. This structure includes an outer first groove 171 extending radially along the outer annular support 11 and an outer first slider 172 engaging with the outer first groove 171. The outer first groove 171 is located on either the outer annular support 11 or the outer molding module 12, and the outer first slider 172 is located on the other. On one hand, the engagement of the outer first groove 171 and the outer first slider 172 connects the outer annular support 11 and the outer molding module 12, preventing the outer molding module 12 from detaching from the outer annular support 11. On the other hand, the engagement of the outer first groove 171 and the outer first slider 172 provides guidance and limiting for the relative movement of the outer molding module 12 and the outer annular support 11, making their relative movement smoother, more stable, and more precise.

[0039] Preferably, the outer first groove 171 and the outer second groove 181 are inverted "T" shape, and the width of the groove opening is smaller than the width of the groove bottom.

[0040] Similarly, the inner forming drive mechanism can be implemented in a variety of ways.

[0041] In some embodiments, the inner forming drive mechanism includes a plurality of hydraulic cylinders mounted on the inner annular support 21. The plurality of hydraulic cylinders extend radially along the inner annular support 21 and are connected one-to-one with the inner forming module 2201. The fixed end of the hydraulic cylinder is fixedly connected to the inner annular support 21, and the telescopic end of the hydraulic cylinder is connected to the inner forming module 22. Each hydraulic cylinder individually drives the corresponding inner forming module 2201 to move. This driving method has a high cost and requires high precision from the hydraulic cylinders.

[0042] Preferably, in some embodiments, the inner forming drive mechanism includes an inner forming cone 23 and an inner forming drive assembly 24. The inner forming cone 23 is disposed inside the inner forming module 22 and coaxially connected to the inner forming module 22. The outer side of the inner forming cone 23 is provided with an outer cone surface 231. The inner side of the inner forming module 22 is provided with an inner cone surface 221 that cooperates with the outer cone surface 231. The inner forming drive assembly 24 connects the inner forming cone 23 and the inner annular support 21 to drive the inner forming cone 23 to move axially relative to the inner annular support 21 and drive each inner forming module 2201 to move synchronously radially along the inner annular support 21. Since the inner molding module 22 is connected to the inner molding cone 23, when each inner molding module 2201 in the inner molding module 22 moves, each inner molding module 2201 is simultaneously subjected to the pushing force of the inner molding cone 23, thus easily achieving synchronous movement of each inner molding module 2201. When the inner forming drive assembly 24 drives the inner forming cone 23 to move axially closer to the inner annular support 21, the outer cone surface 231 of the cone interacts with the inner cone surface 221 of the module, thereby causing each of the inner forming modules 2201 to move radially outward along the inner annular support 21, resulting in an overall expansion tendency of the inner forming module 22, so as to apply inner pressure to the steel pipe in the interface forming cavity to promote the forming of the steel pipe; when the inner forming drive assembly 24 drives the inner forming cone 23 to move axially away from the inner annular support 21, the outer cone surface 231 of the cone interacts with the inner cone surface 221 of the module, thereby causing each of the inner forming modules 2201 to move radially inward along the inner annular support 21, resulting in an overall contraction tendency of the inner forming module 22, so as to facilitate the separation of the formed steel pipe from the inner forming module 22.

[0043] The inner forming drive assembly 24 includes an inner driving hydraulic cylinder connected to the inner forming cone 23. The fixed end of the inner driving hydraulic cylinder is fixedly connected to the inner annular bracket 21, and the movable end of the inner driving hydraulic cylinder is connected to the inner forming cone 23.

[0044] Furthermore, an inner conical surface mating structure is provided between the inner forming cone 23 and the inner forming module 22. The inner conical surface mating structure includes an inner second sliding groove 281 extending along the extending direction of the outer conical surface 231 of the cone and an inner second sliding block 282 that mates with the inner second sliding groove 281. The inner second sliding groove 281 is provided on either the inner forming cone 23 or the inner forming module 22, and the inner second sliding block 282 is provided on the other one of the inner forming cone 23 and the inner forming module 22. On the one hand, the inner forming cone 23 and the inner forming module 22 are connected by the cooperation of the inner second slide groove 281 and the inner second slider 282, preventing the inner forming module 22 from detaching from the inner forming cone 23. On the other hand, the cooperation of the inner second slide groove 281 and the inner second slider 282 provides guidance and limiting for the relative movement of the inner forming cone 23 and the inner forming module 22, making the relative movement of the inner forming cone 23 and the inner forming module 22 more stable, smooth and precise.

[0045] Furthermore, an inner radial engagement structure is provided between the inner annular support 21 and the inner molding module 22. The inner radial engagement structure includes an inner first sliding groove 271 extending radially along the inner annular support 21 and an inner first slider 272 engaging with the inner first sliding groove 271. The inner first sliding groove 271 is provided on either the inner annular support 21 or the inner molding module 22, and the inner first slider 272 is provided on the other of the outer annular support 11 and the outer molding module 12. On the one hand, the inner ring bracket 21 and the inner molding module 22 are connected by the cooperation of the inner first slide groove 271 and the inner first slider 272, preventing the inner molding module 22 from detaching from the inner ring bracket 21. On the other hand, the cooperation of the inner first slide groove 271 and the inner first slider 272 provides guidance and limiting for the relative movement of the inner molding module 22 and the inner ring bracket 21, making the relative movement of the inner molding module 22 and the inner ring bracket 21 more stable, smooth and precise.

[0046] Preferably, the inner first groove 271 and the inner second groove 281 are inverted "T" shape, and the width of the groove opening is smaller than the width of the groove bottom.

[0047] Furthermore, the frame 3 is also equipped with a transfer device 4, which includes a transfer guide rail 41, a transfer slide 42, and a transfer drive assembly 43. The length direction of the transfer guide rail 41 is parallel to the axial direction of the outer annular support 11. The transfer slide 42 is movably mounted on the transfer guide rail 41 and connected to the outer forming device 1 of the socket interface. The transfer drive assembly 43 is connected to the transfer slide 42 to drive the transfer slide 42 to move the outer forming device 1 of the socket interface along the transfer guide rail 41. By driving the outer forming device 1 of the socket interface to move as a whole along the axial direction of the outer annular support 11 through the transfer device 4, it is convenient to perform individual repairs or maintenance on the outer forming device 1 or the inner forming device 2 of the socket interface, and it is also convenient to replace the outer forming module 12 or the inner forming module 2201 with the outer forming module or the inner forming module 2201 of the required production shape.

[0048] Specifically, the transfer drive assembly 43 includes a transfer drive motor 431, a transfer lead screw 432, and a transfer nut 433. The transfer lead screw 432 is connected to the output end of the transfer drive motor 431, and the transfer nut 433 is connected to the transfer slide 42 and threadedly engaged with the transfer lead screw 432. The length direction of the transfer lead screw 432 is parallel to the length direction of the transfer guide rail 41. The transfer drive motor 431 drives the transfer lead screw 432 to rotate, thereby driving the transfer slide 42 connected to the transfer nut 433 to move along the transfer lead screw 432, and further driving the outer forming device 1 of the socket interface to move axially along the outer annular support 11. The structure is simple and easy to implement.

[0049] Furthermore, the frame 3 is also equipped with a lifting device 5, which includes a lifting connecting seat 51, a lifting screw 52, ​​and a lifting drive assembly 53. The lifting connecting seat 51 connects the lifting screw 52 and the inner forming device 2 of the socket interface. The lifting drive assembly 53 is connected to the lifting screw 52 to drive the lifting screw 52 to move the inner forming device 2 of the socket interface up and down. Preferably, the lifting screw 52 is hinged to the lifting connecting seat 51, and the lifting connecting seat 51 is sleeved with the inner driving hydraulic cylinder of the inner forming device 2 of the socket interface. By driving the lifting screw 52 to move the inner forming device 2 of the socket interface up and down through the lifting drive assembly 53, the height of the inner forming device 2 of the socket interface can be easily adjusted, which facilitates the maintenance and repair of the inner forming device 2 of the socket interface, and also facilitates the cooperation between the inner forming device 2 of the socket interface and the outer forming device 1 of the socket interface.

[0050] The lifting drive component 53 can be implemented in a variety of ways.

[0051] In some embodiments, the lifting drive assembly 53 includes a hydraulic cylinder arranged in a vertical direction. The fixed end of the hydraulic cylinder is connected to the frame 3, and the telescopic end of the hydraulic cylinder is connected to the inner forming device 2 of the socket interface. The telescopic movement of the hydraulic cylinder drives the inner forming device 2 of the socket interface to move up and down.

[0052] Preferably, in some embodiments, the lifting drive assembly 53 includes a worm gear, a worm, and a lifting drive motor. The internal thread of the worm gear is threadedly engaged with the lifting screw 52, ​​and the external gear teeth of the worm gear mesh with the worm. The worm is connected to the output end of the lifting drive motor. The lifting drive motor drives the worm to rotate, thereby driving the worm gear meshing with the worm to rotate, which in turn drives the lifting screw threadedly engaged with the worm gear to move up and down relative to the worm gear, thus moving the inner forming device 2 of the socket interface up and down. The lifting drive assembly 53 has a compact overall structure, high transmission efficiency, and the worm and worm gear meshing structure has a self-locking function, ensuring high safety.

[0053] Furthermore, a rotating device 6 is provided on the frame 3. The rotating device 6 is connected to the inner forming device 2 of the socket interface to drive the inner forming device 2 to rotate relative to the outer forming device 1 of the socket interface. The driving direction of the rotating device 6 is perpendicular to the axial direction of the inner annular support 21, so as to drive the inner forming device 2 of the socket interface to rotate relative to the outer forming device 1 of the socket interface. In this embodiment, the rotating device 6 includes a rotary driving hydraulic cylinder. The fixed end of the rotary driving hydraulic cylinder is connected to the frame 3, and the telescopic end of the rotary driving hydraulic cylinder is connected to the inner forming device 2 of the socket interface.

[0054] During the process of forming the socket joint of a steel pipe by the inner forming device 2 and the outer forming device 1, the inner forming module 22 of the inner forming device 2 expands as a whole, and some gaps inevitably appear between each inner forming module 2201. After the inner forming device 2 and the outer forming device 1 complete one socket joint forming operation on the steel pipe, the inner forming device 2 can be driven to rotate relative to the outer forming device 1 by the rotating device 6, so that the inner forming module 22 of the inner forming device 2 rotates accordingly. The inner forming device 2 and the outer forming device 1 then cooperate again to complete one socket joint forming operation on the steel pipe. This effectively eliminates the bosses or dents that may be caused by the gaps between the inner forming modules 2201 during the first forming, and achieves a better forming effect.

[0055] Preferably, the rotating device 6 can drive the inner forming device 2 of the socket interface to rotate 0° to 30° relative to the outer forming device 1 of the socket interface.

[0056] Furthermore, the inner forming module 22 includes a plurality of inner transition modules 2202 arranged in a circumferential array along the inner annular support 21. The inner transition modules 2202 are located inside the inner forming module 2201 and connected to the inner forming module 2201. By adding or removing the inner transition modules 2202 and replacing the corresponding inner forming modules 2201, the distance between the inner forming module 2201 and the inner forming cone 23 can be adjusted, thereby making it suitable for forming steel pipe sockets of different diameters and shapes.

[0057] This utility model discloses a socket-type flexible joint steel pipe spigot forming device, which can be used not only for steel pipe spigot forming but also for steel pipe socket forming. Its usage method is as follows:

[0058] Before the molding operation, the outer molding device 1 of the socket interface can be moved closer to the outer molding device 1 of the socket interface by the transfer device 4, or the inner molding device 2 of the socket interface can be raised and lowered by the lifting device 5, so that the outer molding module 12 and the inner molding module 22 are coaxially positioned and cooperated.

[0059] During the forming operation, one end of the steel pipe is first moved into the interface forming cavity between the outer forming module 12 and the inner forming module 22. Then, the outer forming drive mechanism drives each of the outer forming modules to move synchronously to the designated position along the radial direction of the outer annular support 11, while maintaining the overall contracted state of the outer forming module 12. Subsequently, the inner forming drive mechanism drives each of the inner forming modules 2201 to move synchronously to the designated position along the radial direction of the inner annular support 21, while maintaining the expanded state of the inner forming module 22. This completes the rapid shaping of one end of the steel pipe. Then, the inner forming modules 2201 can be driven by the inner forming drive mechanism to move synchronously to the initial position along the radial direction of the inner annular support 21. At this time, the inner forming module 22 is separated from the inner wall of the steel pipe and is in the initial state. Then, the inner forming device 2 of the socket interface is driven by the rotating device 6 to rotate relative to the outer forming device 1 of the socket interface, so that the inner forming module 22 rotates relative to the outer forming module 12. Then, the inner forming drive mechanism drives the inner forming modules 2201 to move synchronously to the designated position along the radial direction of the inner annular support 21 and maintains the expanded state of the inner forming module 22, thereby completing the secondary shaping of one end of the steel pipe. Then, the inner forming module 2201 is driven by the inner forming drive mechanism to move synchronously to the initial position along the radial direction of the inner annular support 21, and the outer forming module is driven by the outer forming drive mechanism to move synchronously to the initial position along the radial direction of the outer annular support 11, thus completing the demolding of the steel pipe and preparing for the forming of the socket interface of the next steel pipe.

[0060] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A socket-type flexible joint steel pipe socket forming device, characterized in that, It includes a socket outer forming device (1) and a socket inner forming device (2). The socket interface outer forming device (1) includes an outer annular support (11), an outer forming module (12), and an outer forming drive mechanism. The outer forming module (12) is coaxial with the outer annular support (11). The outer forming module (12) includes a plurality of outer forming modules arranged in a circumferential array along the outer annular support (11). The outer forming drive mechanism is connected to the outer forming module (12) to drive each of the outer forming modules to move synchronously inward along the radial direction of the outer annular support (11) or to move synchronously outward along the radial direction of the outer annular support (11). The socket interface inner forming device (2) includes an inner annular support (21), an inner forming module (22), and an inner forming drive mechanism. The inner forming module (22) is located inside the outer forming module (12) to form an interface forming cavity between the inner forming module (22) and the outer forming module (12). The inner forming module (22) is coaxial with the outer forming module (12) and the inner annular support (21). The inner forming module (22) includes a plurality of inner forming modules (2201) arranged in a circumferential array along the inner annular support (21). The inner forming drive mechanism is connected to the inner forming module (22) to drive each inner forming module (2201) to move synchronously inward along the radial direction of the inner annular support (21) or synchronously outward along the radial direction of the inner annular support (21).

2. The socket forming equipment for flexible joint steel pipes according to claim 1, characterized in that, The outer molding drive mechanism includes an outer molding drive seat (13) and an outer molding drive assembly (14). The outer molding drive seat (13) is located on the outside of the outer molding module (12) and is coaxially connected to the outer molding module (12). The inner side of the outer molding drive seat (13) is provided with an inner cone surface (131). The outer side of the outer molding module (12) is provided with an outer cone surface (121) that cooperates with the inner cone surface (131) of the drive seat. The outer molding drive assembly (14) connects the outer molding drive seat (13) and the outer annular support (11) to drive the outer molding drive seat (13) to move axially relative to the outer annular support (11) and drive each of the outer molding modules to move synchronously radially along the outer annular support (11).

3. The socket forming equipment for flexible joint steel pipes according to claim 2, characterized in that, The outer molding drive mechanism includes an outer drive guide assembly (15), which includes a sleeve (151) and a guide post (152) fitted inside the sleeve (151). The sleeve (151) is fixedly connected to either the outer molding drive seat (13) or the outer annular bracket (11), and the guide post (152) is fixedly connected to the other of the outer molding drive seat (13) and the outer annular bracket (11).

4. The socket forming equipment for flexible joint steel pipes according to claim 2, characterized in that, An outer conical surface mating structure is provided between the outer molding drive seat (13) and the outer molding module (12). The outer conical surface mating structure includes an outer second slide groove (181) extending along the extension direction of the outer conical surface (121) of the module and an outer second slider (182) mating with the outer second slide groove (181). The outer second slide groove (181) is provided on either the outer molding drive seat (13) or the outer molding module (12), and the outer second slider (182) is provided on the other one of the outer molding drive seat (13) and the outer molding module (12). An outer radial fitting structure is provided between the outer annular support (11) and the outer molding module (12). The outer radial fitting structure includes an outer first slide groove (171) extending radially along the outer annular support (11) and an outer first slider (172) cooperating with the outer first slide groove (171). The outer first slide groove (171) is provided on either the outer annular support (11) or the outer molding module (12), and the outer first slider (172) is provided on the other one of the outer annular support (11) and the outer molding module (12).

5. A socket-type flexible joint steel pipe socket forming device according to any one of claims 1-4, characterized in that, The inner forming drive mechanism includes an inner forming cone (23) and an inner forming drive assembly (24). The inner forming cone (23) is located inside the inner forming module (22) and is coaxially connected to the inner forming module (22). The outer side of the inner forming cone (23) is provided with an outer cone surface (231). The inner side of the inner forming module (22) is provided with an inner cone surface (221) that cooperates with the outer cone surface (231). The inner forming drive assembly (24) connects the inner forming cone (23) and the inner annular support (21) to drive the inner forming cone (23) to move axially relative to the inner annular support (21) and drive each inner forming module (2201) to move synchronously radially along the inner annular support (21).

6. The socket forming equipment for flexible joint steel pipes according to claim 5, characterized in that, An inner conical surface mating structure is provided between the inner forming cone (23) and the inner forming module (22). The inner conical surface mating structure includes an inner second sliding groove (281) extending along the extension direction of the outer conical surface (231) of the cone and an inner second sliding block (282) mating with the inner second sliding groove (281). The inner second sliding groove (281) is provided on either the inner forming cone (23) or the inner forming module (22), and the inner second sliding block (282) is provided on the other one of the inner forming cone (23) and the inner forming module (22). An inner radial fitting structure is provided between the inner annular support (21) and the inner molding module (22). The inner radial fitting structure includes an inner first slide groove (271) extending radially along the inner annular support (21) and an inner first slider (272) that fits with the inner first slide groove (271). The inner first slide groove (271) is provided on either the inner annular support (21) or the inner molding module (22), and the inner first slider (272) is provided on the other of the outer annular support (11) and the outer molding module (12).

7. The socket forming equipment for flexible joint steel pipes according to claim 1, characterized in that, It also includes a transfer device (4), which includes a transfer guide rail (41), a transfer slide (42), and a transfer drive assembly (43). The length direction of the transfer guide rail (41) is parallel to the axial direction of the outer annular bracket (11). The transfer slide (42) is movably mounted on the transfer guide rail (41) and connected to the outer forming device (1) of the socket interface. The transfer drive assembly (43) is connected to the transfer slide (42) to drive the transfer slide (42) to move the outer forming device (1) of the socket interface along the transfer guide rail (41).

8. The socket forming equipment for flexible joint steel pipes according to claim 1, characterized in that, It also includes a lifting device (5), which includes a lifting connecting seat (51), a lifting screw (52) and a lifting drive assembly (53). The lifting connecting seat (51) connects the lifting screw (52) and the inner forming device (2) of the socket interface. The lifting drive assembly (53) is connected to the lifting screw (52) to drive the lifting screw (52) to move the inner forming device (2) of the socket interface up and down.

9. The socket forming equipment for flexible joint steel pipes according to claim 1, characterized in that, It also includes a rotating device (6), which is connected to the inner forming device (2) of the socket interface to drive the inner forming device (2) of the socket interface to rotate relative to the outer forming device (1) of the socket interface.

10. The socket forming equipment for flexible joint steel pipes according to claim 1, characterized in that, The inner molding module (22) includes a plurality of inner transition modules (2202) arranged in a circumferential array along the inner annular support (21). The inner transition modules (2202) are located inside the inner molding module (2201) and connected to the inner molding module (2201).

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