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

Abstract

The invention relates to the technical field of steel pipe connector forming equipment, in particular to socket connector forming equipment for socket type flexible connector steel pipes, 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] The present invention relates to the technical field of steel pipe joint forming equipment, and specifically to a socket joint forming equipment for socket-type flexible joint steel pipes. Background Art

[0002] In order to facilitate the connection of steel pipes for long-distance transportation, socket-type steel pipes have emerged. One of the pipe ends of the socket-type steel pipe is provided with a socket, and the other pipe end is provided with a spigot. When forming a transportation pipeline, the spigot of the previous steel pipe is inserted into the socket of the next steel pipe, and the convenient connection of the steel pipes can be achieved. As shown in the patent with the patent authorization announcement number CN110871242B regarding "Manufacturing Device and Method for Socket of Socket-Type Steel Pipe", in the existing socket forming equipment for socket-type steel pipes, a socket pressing groove is formed between the upper roll mechanism and the lower roll mechanism. The upper roll mechanism is driven to rotate by a driving mechanism to drive the steel pipe and the lower roll mechanism to rotate, so that one end of the steel pipe forms a socket under the pressing action of the socket pressing groove. This equipment promotes the formation of the socket through the rotary grooving method, and it can form a socket with a simple structure. However, for a complex socket with multiple uneven inner diameters with protrusions and depressions, it is difficult to form or requires multiple adjustments of the grooving for pressing to form, which is troublesome to operate, and the rotary grooving forming takes a long time and the production efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide a socket joint forming equipment for socket-type flexible joint steel pipes, and solve the problems of troublesome operation and low production efficiency caused by the need for multiple adjustments of the pressing groove for pressing when the existing steel pipe socket joint forming equipment processes complex socket joint forming.

[0004] To solve the above problems, the present invention provides the following technical solutions: An insertion joint forming device for a socket-and-spigot flexible joint steel pipe, comprising a frame, on which an outer forming device for the insertion joint and an inner forming device for the insertion joint are provided; the outer forming device for the insertion joint includes an outer annular bracket, an outer forming module, and an outer forming driving mechanism, the outer forming module is coaxial with the outer annular bracket, the outer forming module includes a plurality of outer forming modules arranged in a circumferential array along the outer annular bracket, and the outer forming driving mechanism is connected to the outer forming module to drive each of the outer forming modules to move synchronously inward along the radial direction of the outer annular bracket or move synchronously outward along the radial direction of the outer annular bracket; the inner forming device for the insertion joint includes an inner annular bracket, an inner forming module, and an inner forming driving mechanism, the inner forming module is arranged inside the outer forming module to form an interface forming cavity between the inner forming module and the outer forming module, the inner forming module is coaxial with the outer forming module and the inner annular bracket, the inner forming module includes a plurality of inner forming modules arranged in a circumferential array along the inner annular bracket, and the inner forming driving mechanism is connected to the inner forming module to drive each of the inner forming modules to move synchronously inward along the radial direction of the inner annular bracket or move synchronously outward along the radial direction of the inner annular bracket.

[0005] For the insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above, the outer forming driving mechanism includes an outer forming driving seat and an outer forming driving component, the outer forming driving seat is arranged outside the outer forming module and is coaxially connected to the outer forming module, a driving seat inner conical surface is provided inside the outer forming driving seat, a module outer conical surface matching with the driving seat inner conical surface is provided outside the outer forming module, and the outer forming driving component connects the outer forming driving seat and the outer annular bracket to drive the outer forming driving seat to move axially relative to the outer annular bracket and drive each of the outer forming modules to move synchronously along the radial direction of the outer annular bracket.

[0006] For the insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above, the outer forming driving mechanism includes an outer driving guiding component, the outer driving guiding component includes a sleeve and a guide post sleeved inside the sleeve, the sleeve is fixedly connected to any one of the outer forming driving seat and the outer annular bracket, and the guide post is fixedly connected to the other one of the outer forming driving seat and the outer annular bracket.

[0007] An insertion joint forming device for a socket and spigot flexible joint steel pipe as described above, a lateral conical surface matching structure is provided between the outer forming driving seat and the outer forming module. The lateral conical surface matching structure includes a second lateral chute extending along the extending direction of the outer conical surface of the module and a second lateral slider matching with the second lateral chute. The second lateral chute is provided on either the outer forming driving seat or the outer forming module, and the second lateral slider is provided on the other of the outer forming driving seat and the outer forming module; A lateral radial matching structure is provided between the outer annular bracket and the outer forming module. The lateral radial matching structure includes a first lateral chute extending along the radial direction of the outer annular bracket and a first lateral slider matching with the first lateral chute. The first lateral chute is provided on either the outer annular bracket or the outer forming module, and the first lateral slider is provided on the other of the outer annular bracket and the outer forming module.

[0008] An insertion joint forming device for a socket and spigot flexible joint steel pipe as described above, the inner forming driving mechanism includes an inner forming cone and an inner forming driving component. The inner forming cone is arranged inside the inner forming module and is coaxially connected with the inner forming module. A conical outer surface is provided on the outer side of the inner forming cone, and an inner conical surface matching with the conical outer surface is provided inside the inner forming module. The inner forming driving component connects the inner forming cone and the inner annular bracket to drive the inner forming cone to move axially relative to the inner annular bracket and drive each of the inner forming modules to move synchronously along the radial direction of the inner annular bracket.

[0009] An insertion joint forming device for a socket and spigot flexible joint steel pipe as described above, an inner conical surface matching structure is provided between the inner forming cone and the inner forming module. The inner conical surface matching structure includes a second inner chute extending along the extending direction of the conical outer surface and a second inner slider matching with the second inner chute. The second inner chute is provided on either the inner forming cone or the inner forming module, and the second inner slider is provided on the other of the inner forming cone and the inner forming module; An inner radial matching structure is provided between the inner annular bracket and the inner forming module. The inner radial matching structure includes a first inner chute extending along the radial direction of the inner annular bracket and a first inner slider matching with the first inner chute. The first inner chute is provided on either the inner annular bracket or the inner forming module, and the first inner slider is provided on the other of the outer annular bracket and the outer forming module.

[0010] An insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above. A transfer device is further provided on the frame. The transfer device includes a transfer guide rail, a transfer sliding seat, and a transfer driving component. The length direction of the transfer guide rail is parallel to the axial direction of the outer annular bracket. The transfer sliding seat is movably arranged on the transfer guide rail and is connected to the outer forming device of the socket joint. The transfer driving component is connected to the transfer sliding seat to drive the transfer sliding seat to drive the outer forming device of the socket joint to move along the transfer guide rail.

[0011] An insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above. A lifting device is further provided on the frame. The lifting device includes a lifting connection seat, a lifting screw rod, and a lifting driving component. The lifting connection seat connects the lifting screw rod and the inner forming device of the socket joint. The lifting driving component is connected to the lifting screw rod to drive the lifting screw rod to drive the inner forming device of the socket joint to move up and down.

[0012] An insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above. A rotating device is provided on the frame. The rotating device 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.

[0013] An insertion joint forming device for a socket-and-spigot flexible joint steel pipe as described above. The inner forming module includes a plurality of inner transition modules arranged in a circumferential array along the inner annular bracket. The inner transition modules are arranged inside the inner forming module and are connected to the inner forming module.

[0014] Compared with the prior art, the present invention has the following advantages: The insertion joint forming device for a socket-and-spigot flexible joint steel pipe provided by the present invention drives each of the outer forming modules to synchronously move inward along the radial direction of the outer annular bracket through the outer forming driving mechanism, and drives each of the inner forming modules to synchronously move outward along the radial direction of the inner annular bracket through the inner forming driving mechanism, so that the steel pipe is formed by one-time pressing in the joint forming cavity between the inner forming module and the outer forming module. The inner forming module and the outer forming module can be customized with corresponding profiles according to actual needs, which can meet the rapid forming of complex socket joints with different structures, is simple to operate, and has high forming efficiency. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention.

[0017] Figure 2 It is a partial structural schematic diagram of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention. Figure 1 。

[0018] Figure 3 It is a partial structural schematic diagram of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention. Figure 2 。

[0019] Figure 4 It is an exploded view of an inner forming device for an insertion joint of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic connection structure diagram of an outer forming device and a transfer device for an insertion joint of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention.

[0021] Figure 6 It is an exploded view of an outer forming device for an insertion joint of an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic structural diagram of a transfer device for an insertion joint forming device for an insertion type flexible joint steel pipe according to an embodiment of the present invention.

[0023] Among them, the corresponding numbers of the reference numerals are as follows: 1. Socket and spigot joint outer forming device; 11. Outer annular support; 12. Outer forming module; 121. Outer conical surface of the module; 13. Outer forming drive seat; 131. Inner conical surface of the drive seat; 14. Outer forming drive assembly; 15. Outer drive guiding assembly; 151. Sleeve; 152. Guide post; 171. First outer chute; 172. First outer slider; 181. Second outer chute; 182. Second outer slider; 2. Socket and spigot joint inner forming device; 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. First inner chute; 272. First inner slider; 281. Second inner chute; 282. Second inner slider; 3. Frame; 4. Transfer device; 41. Transfer guide rail; 42. Transfer sliding seat; 43. Transfer drive assembly; 431. Transfer drive motor; 432. Transfer lead screw; 433. Transfer nut; 5. Lifting device; 51. Lifting connection seat; 52. Lifting lead screw; 53. Lifting drive assembly; 6. Rotating device. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to the attached Figure 1 to the attached Figure 7, this embodiment provides a socket joint forming device for a socket and spigot flexible joint steel pipe, including a frame 3, on which a socket joint outer forming device 1 and a socket joint inner forming device 2 are provided; the socket joint outer forming device 1 includes an outer annular support 11, an outer forming module 12, and an outer forming driving 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, and the outer forming driving 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 joint inner forming device 2 includes an inner annular support 21, an inner forming module 22, and an inner forming driving mechanism, the inner forming module 22 is arranged inside the outer forming module 12 to form a joint 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, and the inner forming driving mechanism is connected to the inner forming module 22 to drive each of the inner forming modules 2201 to move synchronously inward along the radial direction of the inner annular support 21 or to move synchronously outward along the radial direction of the inner annular support 21. The socket joint forming device for a socket and spigot flexible joint steel pipe provided by this embodiment drives each of the outer forming modules to move synchronously inward along the radial direction of the outer annular support 11 through the outer forming driving mechanism, and drives each of the inner forming modules 2201 to move synchronously outward along the radial direction of the inner annular support 21 through the inner forming driving mechanism, so that the steel pipe is formed by one-time pressing in the joint 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 profiles according to actual needs, which can meet the rapid forming of complex socket joints with different structures, is simple to operate, and has high forming efficiency.

[0026] Among them, the outer forming driving mechanism can be implemented in various ways.

[0027] In some embodiments, the outer forming driving mechanism includes a plurality of hydraulic cylinders arranged on the outer annular support 11, the plurality of hydraulic cylinders extend along the radial direction of 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, the telescopic end of the hydraulic cylinder is connected to the outer forming module 12, and each hydraulic cylinder drives the corresponding outer forming module to move independently. This driving method has a high cost and high precision requirements for the hydraulic cylinders.

[0028] Preferably, in some embodiments, the outer forming drive mechanism includes an outer forming drive base 13 and an outer forming drive assembly 14. The outer forming drive base 13 is disposed outside the outer forming module 12 and is coaxially connected to the outer forming module 12. An inner conical surface 131 of the drive base is provided inside the outer forming drive base 13, and an outer conical surface 121 that mates with the inner conical surface 131 of the drive base is provided outside the outer forming module 12. The outer forming drive assembly 14 connects the outer forming drive base 13 and the outer annular bracket 11 to drive the outer forming drive base 13 to move axially relative to the outer annular bracket 11 and drive each of the outer forming modules to move synchronously along the radial direction of the outer annular bracket 11. Among them, the outer forming drive base 13 is annular. Since the outer forming module 12 is connected to the outer forming drive base 13, when each outer forming module in the outer forming module 12 moves, it is simultaneously subjected to the thrust of the outer forming drive base 13, and the synchronous movement of each outer forming module is easily achieved. When the outer forming drive assembly 14 drives the outer forming drive base 13 to move axially closer to the outer annular bracket 11, the inner conical surface 131 of the drive base and the outer conical surface 121 of the module interact, so that each of the outer forming modules moves inward along the radial direction of the outer annular bracket 11, and thus the outer forming module 12 has an overall shrinking tendency to apply an outer 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 base 13 to move axially away from the outer annular bracket 11, the inner conical surface 131 of the drive base and the outer conical surface 121 of the module interact, so that each of the outer forming modules moves outward along the radial direction of the outer annular bracket 11, and thus the outer forming module 12 has an overall expanding tendency to facilitate the separation of the formed steel pipe from the outer forming module 12.

[0029] Among them, the outer forming drive assembly 14 includes an outer drive hydraulic cylinder, and a plurality of the outer forming drive assemblies 14 are arranged in a circumferential array along the outer forming drive base 13. The driving effect is good, which is beneficial to driving the synchronous movement of each outer forming module in the outer forming module 12.

[0030] Furthermore, the outer forming driving mechanism includes an outer driving and guiding assembly 15, and the outer driving and guiding assembly 15 includes a sleeve 151 and a guide post 152 sleeved inside the sleeve 151. The sleeve 151 is fixedly connected to either the outer forming driving seat 13 or the outer annular bracket 11, and the guide post 152 is fixedly connected to the other of the outer forming driving seat 13 and the outer annular bracket 11. When the outer forming driving assembly 14 drives the outer forming driving seat 13 to move axially relative to the outer annular bracket 11, the guide post 152 moves relative to the sleeve 151, thereby providing a guiding effect for the axial movement of the outer forming driving seat 13 relative to the outer annular bracket 11, making the axial movement of the outer forming driving seat 13 relative to the outer annular bracket 11 smoother and more stable, which is beneficial to driving the synchronous movement of each outer forming module in the outer forming module 12.

[0031] Preferably, a plurality of the outer driving and guiding assemblies 15 are arranged in a circumferential array along the outer forming driving seat 13. The guiding effect is good, which is beneficial to promoting the smoother and more stable axial movement of the outer forming driving seat 13 relative to the outer annular bracket 11.

[0032] Furthermore, an outer conical surface matching structure is provided between the outer forming driving seat 13 and the outer forming module 12. The outer conical surface matching structure includes an outer second chute 181 extending along the extension direction of the outer conical surface 121 of the module and an outer second slider 182 matching with the outer second chute 181. The outer second chute 181 is provided on either the outer forming driving seat 13 or the outer forming module 12, and the outer second slider 182 is provided on the other of the outer forming driving seat 13 and the outer forming module 12. On the one hand, the outer forming driving seat 13 and the outer forming module 12 are connected through the cooperation of the outer second chute 181 and the outer second slider 182, avoiding the separation of the outer forming module 12 from the outer forming driving seat 13. On the other hand, the cooperation of the outer second chute 181 and the outer second slider 182 provides a guiding effect and a limiting effect for the relative movement of the outer forming driving seat 13 and the outer forming module 12, making the relative movement of the outer forming driving seat 13 and the outer forming module 12 smoother, more stable and more accurate.

[0033] Further, an outer radial mating structure is provided between the outer annular bracket 11 and the outer forming module 12. The outer radial mating structure includes an outer first chute 171 extending radially along the outer annular bracket 11 and an outer first slider 172 mating with the outer first chute 171. The outer first chute 171 is provided on either the outer annular bracket 11 or the outer forming module 12, and the outer first slider 172 is provided on the other of the outer annular bracket 11 and the outer forming module 12. On the one hand, the outer annular bracket 11 and the outer forming module 12 are connected through the cooperation of the outer first chute 171 and the outer first slider 172, preventing the outer forming module 12 from detaching from the outer annular bracket 11. On the other hand, the cooperation of the outer first chute 171 and the outer first slider 172 provides guidance and limitation for the relative movement of the outer forming module 12 and the outer annular bracket 11, making the relative movement of the outer forming module 12 and the outer annular bracket 11 smoother, more stable, and more accurate.

[0034] Preferably, the outer first chute 171 and the outer second chute 181 are in an inverted "T" shape, and the width of the notch is smaller than the width of the bottom of the chute.

[0035] Similarly, the inner forming drive mechanism can be implemented in various ways.

[0036] In some embodiments, the inner forming drive mechanism includes a plurality of hydraulic cylinders provided on the inner annular bracket 21. The plurality of hydraulic cylinders extend radially along the inner annular bracket 21 and are connected to the inner forming modules 2201 in a one-to-one correspondence. The fixed end of the hydraulic cylinder is fixedly connected to the inner annular bracket 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 for the hydraulic cylinders.

[0037] 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 is coaxially connected to the inner forming module 22. An outer conical surface 231 is provided on the outer side of the inner forming cone 23, and an inner conical surface 221 that cooperates with the outer conical surface 231 is provided inside the inner forming module 22. The inner forming drive assembly 24 connects the inner forming cone 23 and the inner annular bracket 21 to drive the inner forming cone 23 to move axially relative to the inner annular bracket 21 and drive each of the inner forming modules 2201 to move synchronously along the radial direction of the inner annular bracket 21. Since the inner forming module 22 is connected to the inner forming cone 23, when each of the inner forming modules 2201 in the inner forming module 22 moves, each of the inner forming modules 2201 is simultaneously subjected to the pushing force of the inner forming cone 23, and the synchronous movement of each of the inner forming modules 2201 is easily achieved. When the inner forming drive assembly 24 drives the inner forming cone 23 to move axially closer to the inner annular bracket 21, the outer conical surface 231 and the inner conical surface 221 interact with each other, so that each of the inner forming modules 2201 moves radially outward along the inner annular bracket 21, and thus the inner forming module 22 has a tendency to expand as a whole, so as to apply an 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 bracket 21, the outer conical surface 231 and the inner conical surface 221 interact with each other, so that each of the inner forming modules 2201 moves radially inward along the inner annular bracket 21, and thus the inner forming module 22 has a tendency to contract as a whole, so as to facilitate the separation of the formed steel pipe from the inner forming module 22.

[0038] Wherein, the inner forming drive assembly 24 includes an inner drive hydraulic cylinder connected to the inner forming cone 23. The fixed end of the inner drive hydraulic cylinder is fixedly connected to the inner annular bracket 21, and the movable end of the inner drive hydraulic cylinder is connected to the inner forming cone 23.

[0039] Furthermore, an inner conical surface fitting structure is provided between the inner forming cone 23 and the inner forming module 22. The inner conical surface fitting structure includes an inner second chute 281 extending along the extension direction of the outer conical surface 231 of the cone and an inner second slider 282 cooperating with the inner second chute 281. The inner second chute 281 is provided on either the inner forming cone 23 or the inner forming module 22, and the inner second slider 282 is provided on the other of the inner forming cone 23 and the inner forming module 22. On the one hand, the cooperation between the inner second chute 281 and the inner second slider 282 enables the connection between the inner forming cone 23 and the inner forming module 22, preventing the inner forming module 22 from detaching from the inner forming cone 23. On the other hand, the cooperation between the inner second chute 281 and the inner second slider 282 provides a guiding and limiting effect for the relative movement between the inner forming cone 23 and the inner forming module 22, making the relative movement between the inner forming cone 23 and the inner forming module 22 smoother, more stable, and more accurate.

[0040] Furthermore, an inner radial fitting structure is provided between the inner annular bracket 21 and the inner forming module 22. The inner radial fitting structure includes an inner first chute 271 extending radially along the inner annular bracket 21 and an inner first slider 272 cooperating with the inner first chute 271. The inner first chute 271 is provided on either the inner annular bracket 21 or the inner forming module 22, and the inner first slider 272 is provided on the other of the outer annular bracket 11 and the outer forming module 12. On the one hand, the cooperation between the inner first chute 271 and the inner first slider 272 enables the connection between the inner annular bracket 21 and the inner forming module 22, preventing the inner forming module 22 from detaching from the inner annular bracket 21. On the other hand, the cooperation between the inner first chute 271 and the inner first slider 272 provides a guiding and limiting effect for the relative movement between the inner forming module 22 and the inner annular bracket 21, making the relative movement between the inner forming module 22 and the inner annular bracket 21 smoother, more stable, and more accurate.

[0041] Preferably, the inner first chute 271 and the inner second chute 281 are in an inverted "T" shape, and the width of the notch is smaller than the width of the bottom of the chute.

[0042] Furthermore, a transfer device 4 is also provided on the frame 3. The transfer device 4 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 arranged on the transfer guide rail 41 and is connected to the outer forming device 1 of the socket joint. The transfer drive assembly 43 is connected to the transfer slide 42 to drive the transfer slide 42 to drive the outer forming device 1 of the socket joint to move along the transfer guide rail 41. By driving the outer forming device 1 of the socket joint to move integrally along the axial direction of the outer annular bracket 11 through the transfer device 4, it is convenient to perform individual repairs or maintenance on the outer forming device 1 of the socket joint or the inner forming device 2 of the socket joint, and it is also convenient to replace the outer forming module or the inner forming module 2201 of the required shape for production on the outer forming module 12 or the inner forming module 22.

[0043] 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. The transfer nut 433 is connected to the transfer slide 42 and is in threaded cooperation 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 joint to move integrally along the axial direction of the outer annular bracket 11. The structure is simple and easy to implement.

[0044] Furthermore, a lifting device 5 is also provided on the frame 3. The lifting device 5 includes a lifting connection seat 51, a lifting lead screw 52, and a lifting drive assembly 53. The lifting connection seat 51 connects the lifting lead screw 52 and the inner forming device 2 of the socket joint. The lifting drive assembly 53 is connected to the lifting lead screw 52 to drive the lifting lead screw 52 to drive the inner forming device 2 of the socket joint to move up and down. Preferably, the lifting lead screw 52 is hinged to the lifting connection seat 51, and the lifting connection seat 51 is sleeved and connected to the inner drive hydraulic cylinder of the inner forming device 2 of the socket joint. By driving the lifting lead screw 52 to drive the inner forming device 2 of the socket joint to move up and down through the lifting drive assembly 53, the height of the inner forming device 2 of the socket joint can be conveniently adjusted, which is convenient for the repair and maintenance of the inner forming device 2 of the socket joint, and is also convenient for the inner forming device 2 of the socket joint to cooperate with the outer forming device 1 of the socket joint.

[0045] Among them, the lifting drive assembly 53 can be realized in various ways.

[0046] In some embodiments, the lifting drive assembly 53 includes a hydraulic cylinder. The hydraulic cylinder is arranged in the 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 joint. The inner forming device 2 of the socket joint is driven to move up and down by the telescopic movement of the hydraulic cylinder.

[0047] 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 in threaded cooperation with the lifting screw rod 52. The external gear teeth of the worm gear are engaged 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 engaged with the worm to rotate, and further driving the lifting screw rod in threaded cooperation with the worm gear to lift relative to the worm gear, so as to drive the inner forming device 2 of the socket joint to move up and down. The overall structure of the lifting drive assembly 53 is compact, the transmission accuracy is high, and the worm and worm gear cooperation structure has a self-locking function, so the safety is high.

[0048] Further, 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 joint to drive the inner forming device 2 of the socket joint to rotate relative to the outer forming device 1 of the socket joint. The driving direction of the rotating device 6 is perpendicular to the axial direction of the inner annular bracket 21, so as to drive the inner forming device 2 of the socket joint to rotate relative to the outer forming device 1 of the socket joint. The rotating device 6 of this embodiment includes a rotating drive hydraulic cylinder. The fixed end of the rotating drive hydraulic cylinder is connected to the frame 3, and the telescopic end of the rotating drive hydraulic cylinder is connected to the inner forming device 2 of the socket joint.

[0049] During the process of forming the steel pipe socket joint by the cooperation of the inner forming device 2 of the socket joint and the outer forming device 1 of the socket joint, the inner forming module 22 of the inner forming device 2 of the socket joint expands as a whole, and some gaps are inevitably formed between each inner forming module 2201. After the inner forming device 2 of the socket joint and the outer forming device 1 of the socket joint cooperate to complete a forming operation of the steel pipe socket joint, the rotating device 6 can be used to drive the inner forming device 2 of the socket joint to rotate relative to the outer forming device 1 of the socket joint, so that the inner forming module 22 of the inner forming device 2 of the socket joint rotates accordingly. The inner forming device 2 of the socket joint and the outer forming device 1 of the socket joint cooperate again to complete a forming operation of the steel pipe socket joint, which can effectively eliminate the protrusions or indentations that may be generated due to the gaps between the inner forming modules 2201 in the first forming, and obtain a better forming effect.

[0050] Preferably, the rotating device 6 can drive the inner forming device 2 of the socket joint to rotate 0° to 30° relative to the outer forming device 1 of the socket joint.

[0051] Furthermore, the inner forming module 22 includes a plurality of inner transition modules 2202 arranged in a circumferential array along the inner annular bracket 21. The inner transition modules 2202 are disposed inside the inner forming module 2201 and connected to the inner forming module 2201. By increasing or decreasing the inner transition modules 2202 and replacing the corresponding inner forming module 2201, the distance between the inner forming module 2201 and the inner forming cone 23 can be adjusted, so as to be applicable to the forming of steel pipe socket and spigot with different pipe diameters and different shapes.

[0052] The socket and spigot forming device for the socket and spigot flexible joint steel pipe of the present invention can not only be used for the forming of the steel pipe socket, but also for the forming of the steel pipe spigot. The using method is as follows: Before the forming operation, the socket and spigot outer forming device 1 can be driven by the transfer device 4 to move close to the socket and spigot outer forming device 1, or the socket and spigot inner forming device 2 can be driven by the lifting device 5 to lift and lower, so that the outer forming module 12 and the inner forming module 22 are coaxially positioned and matched.

[0053] During the forming operation, first move one end of the steel pipe into the interface forming cavity between the outer forming module 12 and the inner forming module 22. Then, drive each of the outer forming modules to synchronously move radially inward along the outer annular bracket 11 to a specified position by the outer forming driving mechanism, and keep the overall contraction state of the outer forming module 12. Subsequently, drive each of the inner forming modules 2201 to synchronously move radially outward along the inner annular bracket 21 to a specified position by the inner forming driving mechanism, and keep the expansion state of the inner forming module 22, so as to complete the rapid shaping of one end of the steel pipe. Then, the inner forming driving mechanism can be used to drive each of the inner forming modules 2201 to synchronously move radially inward along the inner annular bracket 21 to the initial position. At this time, the inner forming module 22 disengages from the inner wall of the steel pipe, and the inner forming module 22 is in the initial state. Subsequently, drive the socket and spigot inner forming device 2 to rotate relative to the socket and spigot outer forming device 1 by the rotating device 6, so that the inner forming module 22 rotates relative to the outer forming module 12. Then, drive each of the inner forming modules 2201 to synchronously move radially outward along the inner annular bracket 21 to a specified position by the inner forming driving mechanism, and keep the expansion state of the inner forming module 22, so as to complete the secondary shaping of one end of the steel pipe. Then, drive each of the inner forming modules 2201 to synchronously move radially inward along the inner annular bracket 21 to the initial position by the inner forming driving mechanism, and drive each of the outer forming modules to synchronously move radially outward along the outer annular bracket 11 to the initial position by the outer forming driving mechanism, so as to complete the demolding of the steel pipe, and at the same time prepare for the forming of the socket and spigot of the next steel pipe.

[0054] It should be understood that in the present invention, terms such as "first" and "second" are used to describe various information, but such 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 the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information. In addition, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0055] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. An insertion joint forming device for socket-and-spigot flexible joint steel pipes, including a frame (3), characterized in that, The frame (3) is provided with an outer forming device (1) for the socket interface and an inner forming device (2) for the socket interface; The outer forming device (1) for the socket interface includes an outer annular support (11), an outer forming module (12), and an outer forming driving 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 driving 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 inner forming device (2) for the socket interface includes an inner annular support (21), an inner forming module (22), and an inner forming driving mechanism. The inner forming module (22) is arranged 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 driving mechanism is connected to the inner forming module (22) to drive each of the inner forming modules (2201) to move synchronously inward along the radial direction of the inner annular support (21) or to move synchronously outward along the radial direction of the inner annular support (21).

2. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 1, characterized in that, The outer forming driving mechanism includes an outer forming driving seat (13) and an outer forming driving component (14). The outer forming driving seat (13) is arranged outside the outer forming module (12) and is coaxially connected to the outer forming module (12). The inner side of the outer forming driving seat (13) is provided with a driving seat inner conical surface (131). The outer side of the outer forming module (12) is provided with a module outer conical surface (121) that cooperates with the driving seat inner conical surface (131). The outer forming driving component (14) connects the outer forming driving seat (13) and the outer annular support (11) to drive the outer forming driving seat (13) to move axially relative to the outer annular support (11) and drive each of the outer forming modules to move synchronously along the radial direction of the outer annular support (11).

3. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 2, characterized in that, The outer forming driving mechanism includes an outer driving guiding component (15). The outer driving guiding component (15) includes a sleeve (151) and a guide post (152) sleeved inside the sleeve (151). The sleeve (151) is fixedly connected to either the outer forming driving seat (13) or the outer annular support (11). The guide post (152) is fixedly connected to the other of the outer forming driving seat (13) and the outer annular support (11).

4. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 2, characterized in that, An outer conical surface mating structure is provided between the outer forming drive seat (13) and the outer forming module (12). The outer conical surface mating structure includes an outer second chute (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 chute (181). The outer second chute (181) is provided on either the outer forming drive seat (13) or the outer forming module (12), and the outer second slider (182) is provided on the other of the outer forming drive seat (13) and the outer forming module (12). An outer radial mating structure is provided between the outer annular bracket (11) and the outer forming module (12). The outer radial mating structure includes an outer first chute (171) extending radially along the outer annular bracket (11) and an outer first slider (172) mating with the outer first chute (171). The outer first chute (171) is provided on either the outer annular bracket (11) or the outer forming module (12), and the outer first slider (172) is provided on the other of the outer annular bracket (11) and the outer forming module (12).

5. The insertion joint forming device for socket-and-spigot flexible joint steel pipes 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 provided inside the inner forming module (22) and is coaxially connected to the inner forming module (22). An outer conical surface (231) is provided on the outer side of the inner forming cone (23), and an inner conical surface (221) mating with the outer conical surface (231) is provided inside the inner forming module (22). The inner forming drive assembly (24) connects the inner forming cone (23) and the inner annular bracket (21) to drive the inner forming cone (23) to move axially relative to the inner annular bracket (21) and drive each of the inner forming modules (2201) to move synchronously in the radial direction along the inner annular bracket (21).

6. The insertion joint forming device for socket-and-spigot 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 chute (281) extending along the extension direction of the outer conical surface (231) and an inner second slider (282) mating with the inner second chute (281). The inner second chute (281) is provided on either the inner forming cone (23) or the inner forming module (22), and the inner second slider (282) is provided on the other of the inner forming cone (23) and the inner forming module (22). An inner radial matching structure is provided between the inner annular bracket (21) and the inner forming module (22). The inner radial matching structure includes an inner first sliding groove (271) extending radially along the inner annular bracket (21) and an inner first sliding block (272) cooperating with the inner first sliding groove (271). The inner first sliding groove (271) is provided on either the inner annular bracket (21) or the inner forming module (22), and the inner first sliding block (272) is provided on the other of the outer annular bracket (11) and the outer forming module (12).

7. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 1, characterized in that, A transfer device (4) is further provided on the frame (3). The transfer device (4) includes a transfer guide rail (41), a transfer sliding seat (42), and a transfer driving 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 sliding seat (42) is movably provided on the transfer guide rail (41) and is connected to the outer forming device (1) of the socket interface. The transfer driving assembly (43) is connected to the transfer sliding seat (42) to drive the transfer sliding seat (42) to drive the outer forming device (1) of the socket interface to move along the transfer guide rail (41).

8. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 1, characterized in that, A lifting device (5) is further provided on the frame (3). The lifting device (5) includes a lifting connection seat (51), a lifting screw rod (52), and a lifting driving assembly (53). The lifting connection seat (51) connects the lifting screw rod (52) and the inner forming device (2) of the socket interface. The lifting driving assembly (53) is connected to the lifting screw rod (52) to drive the lifting screw rod (52) to drive the inner forming device (2) of the socket interface to move up and down.

9. The insertion joint forming device for socket-and-spigot flexible joint steel pipes according to claim 1, characterized in that, 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) of the socket interface to rotate relative to the outer forming device (1) of the socket interface.

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

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