Pipe structure butt joint positioning device and pipe structure production line

Abstract

The application belongs to the field of pipe structure production, and discloses a pipe structure butt joint positioning device and a pipe structure production line, wherein the two clamping matching pieces of the clamping die can adjust the spacing, so that the clamping die can match the pipe diameter of the pipe fitting and accurately position and clamp the pipe fitting; the top die is detachable, and different models of the top die can be conveniently replaced to realize accurate positioning of different models of pipe joints; therefore, the clamping die and the top die both have the characteristics of flexibility and high-precision positioning; in addition, a hydraulic control system and multiple hydraulic cylinders are matched to control the displacement of the clamping die and the top die, so that highly automated and high-precision operations can be realized; therefore, the application is far superior to manual butt joint operations in terms of structural configuration, control mode and the like, can effectively improve the butt joint coaxiality of the pipe joint and the pipe fitting, thereby reducing the cracking risk of the joint (weld seam), and can effectively improve the butt joint efficiency of the pipe joint and the pipe fitting, thereby effectively improving the manufacturing efficiency of the pipe structure as a whole.

Description

Technical Field

[0001] This invention relates to the field of pipe structure manufacturing technology, specifically to a pipe structure docking and positioning device and a pipe structure production line. Background Technology

[0002] Currently, welded hydraulic hard pipes on the market require manual connection of pipe joints and fittings during manufacturing, followed by spot welding for fixation. However, manual connection is inefficient and results in poor coaxiality between pipe joints and fittings, which affects the welding fusion of subsequent welds and can easily cause weld fusion eccentricity. Consequently, under the high pulse and high pressure conditions of engineering machinery, cracking and oil leakage can easily occur at weak points in the weld fusion. Summary of the Invention

[0003] In view of at least one of the above-mentioned defects or deficiencies in the prior art, the present invention provides a pipe structure docking and positioning device and a pipe structure production line, which can effectively improve the docking efficiency and coaxiality of pipe joints and fittings, so as to reduce the risk of weld cracking and oil leakage and improve the manufacturing efficiency of pipe structures.

[0004] To achieve the above objectives, the first aspect of the present invention provides a pipe structure docking and positioning device, comprising:

[0005] Workbench;

[0006] A pipe positioning mechanism is provided on the workbench and includes a clamping mold and a clamping mold displacement hydraulic cylinder. The clamping mold includes two clamping mating parts arranged at intervals along a first direction. The clamping mold displacement hydraulic cylinder is arranged along the first direction and can drive the two clamping mating parts to jointly position and clamp the pipe.

[0007] A pipe fitting feeding mechanism, mounted on the worktable, includes a top mold and a pipe fitting displacement hydraulic cylinder. The top mold is detachably connected to the telescopic movable end of the pipe fitting displacement hydraulic cylinder and is used to detachably fix a pipe fitting arranged along a second direction. The pipe fitting displacement hydraulic cylinder is arranged along the second direction and is capable of driving the pipe fitting to position and mate with the pipe fitting.

[0008] The hydraulic control system can control the clamping mold displacement hydraulic cylinder and the pipe joint displacement hydraulic cylinder to perform extension and retraction actions respectively.

[0009] Optionally, the top mold includes an inner conical top mold and an outer conical top mold that are alternatively connected to the telescopic movable end of the pipe joint displacement hydraulic cylinder;

[0010] The inner conical top mold includes a top mold cylindrical base section, a top mold conical insertion section, and a top mold cylindrical insertion section connected sequentially along the axial direction. The top mold cylindrical insertion section can be inserted and positioned in the joint cylindrical hole of the inner conical joint, and the top mold conical insertion section can be inserted and positioned in the joint conical sleeve hole of the inner conical joint.

[0011] The outer conical top mold includes a top mold cylindrical body and a top mold conical sleeve hole formed recessed in the end face of the top mold cylindrical body. The top mold conical sleeve hole can be sleeved onto the conical outer peripheral surface of the positioning outer conical joint.

[0012] Optionally, V-shaped positioning grooves are formed on the outer wall areas of both clamping parts facing each other, and the outer peripheral wall of the pipe can be jointly positioned and clamped by the inner walls of the two V-shaped positioning grooves.

[0013] Optionally, the pipe structure docking and positioning device further includes:

[0014] The ejector plate is displaceably mounted on the worktable, and the top surface of the ejector plate is provided with the tube positioning mechanism.

[0015] The substrate displacement hydraulic cylinder can drive the retracted and discharged substrate to move so that the pipe and the pipe joint that have been spot-welded and fixed can enter the discharge area set on the worktable.

[0016] A retraction and discharge hydraulic cylinder is arranged along the first direction within the discharge zone and is capable of pushing the spot-welded and fixed pipe fittings and pipe joints located within the discharge zone outward.

[0017] Optionally, a guide groove is formed on the ejector plate along the first direction, and the clamping fitting forms a guiding fit with the guide groove.

[0018] Optionally, the hydraulic control system includes an oil tank, an oil pump, an oil pump drive device, a first hydraulic circuit equipped with a first electromagnetic directional valve, a second hydraulic circuit equipped with a second electromagnetic directional valve, a third hydraulic circuit equipped with a third electromagnetic directional valve, and a fourth hydraulic circuit equipped with a fourth electromagnetic directional valve.

[0019] The oil pump drive device is connected to the oil pump, the oil pump inlet is connected to the oil tank outlet, the first hydraulic circuit is connected between the pipe joint displacement hydraulic cylinder and the oil pump outlet and the oil tank return end, the second hydraulic circuit is connected between the substrate displacement hydraulic cylinder and the oil pump outlet and the oil tank return end, the third hydraulic circuit is connected between the clamping mold displacement hydraulic cylinder and the oil pump outlet and the oil tank return end, and the fourth hydraulic circuit is connected between the retraction and discharge hydraulic cylinder and the oil pump outlet and the oil tank return end.

[0020] Optionally, the first hydraulic circuit is provided with a first hydraulic lock, which is located between the first solenoid directional valve and the pipe joint displacement hydraulic cylinder; the second hydraulic circuit is provided with a second hydraulic lock, which is located between the second solenoid directional valve and the substrate displacement hydraulic cylinder; the third hydraulic circuit is provided with a third hydraulic lock, which is located between the third solenoid directional valve and the clamping mold displacement hydraulic cylinder; and the fourth hydraulic circuit is provided with a fourth hydraulic lock, which is located between the fourth solenoid directional valve and the retraction and discharge hydraulic cylinder.

[0021] Optionally, the pipe positioning mechanism includes two connecting plates respectively connected to the two clamping mating parts and a synchronization mechanism connected between the two connecting plates, wherein either of the two connecting plates is fixed to the telescopic movable end of the clamping mold displacement hydraulic cylinder.

[0022] A second aspect of the present invention provides a pipe structure production line, including the aforementioned pipe structure docking and positioning equipment.

[0023] Optionally, the tubular structure production line further includes:

[0024] An automatic spot welding device is used to spot weld and fix the joint of the pipe fitting and the pipe joint that are coaxially positioned and connected in the pipe structure docking and positioning device.

[0025] In this invention, the two clamping mating parts of the clamping mold have an adjustable spacing, allowing the clamping mold to accurately position and clamp the pipe fittings according to their diameter. The top mold is detachable, facilitating the replacement of different models to achieve precise positioning of different pipe fittings. Therefore, both the clamping mold and the top mold possess the characteristics of flexibility and high-precision positioning. Furthermore, with the assistance of a hydraulic control system and various hydraulic cylinders to control the displacement of the clamping mold and top mold, a high degree of automation and high-precision operation can be achieved. Thus, this invention is far superior to manual docking operations in terms of structural configuration and control methods. It can effectively improve the coaxiality of the pipe fitting and the joint, ensuring the welding fusion degree during subsequent welding, avoiding welding fusion eccentricity, thereby reducing the risk of weld cracking and oil leakage. Simultaneously, it can effectively improve the docking efficiency of the pipe fitting and the joint, thereby effectively improving the overall manufacturing efficiency of the pipe structure.

[0026] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1This is a schematic diagram of the use of a pipe structure docking and positioning device in a specific embodiment of the present invention. The first direction and the second direction are perpendicular to each other in the illustrated state.

[0029] Figure 2 for Figure 1 Another schematic diagram of the pipe structure docking and positioning device is shown, in which the first direction and the second direction are the same in the illustrated state;

[0030] Figure 3 This is a schematic diagram of the structure of a clamping mold displacement hydraulic cylinder, a pipe joint displacement hydraulic cylinder, a substrate displacement hydraulic cylinder, a retraction and feeding hydraulic cylinder, and a hydraulic control system according to a specific embodiment of the present invention.

[0031] Figure 4 This is a top view of a clamping mold according to a specific embodiment of the present invention;

[0032] Figure 5 for Figure 4 A front view of the clamping mold;

[0033] Figure 6 This is a schematic diagram of an internal conical top mold according to a specific embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of an external conical top mold according to a specific embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of a pipe structure in the prior art, and the pipe joint shown in the diagram is an internal tapered joint;

[0036] Figure 9 This is a schematic diagram of another pipe structure in the prior art, in which the pipe joint is an external tapered joint.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 pipe fittings 200 pipe connectors

[0039] 301 Workbench; 302 Return / Outfeed Substrate

[0040] 303 Rotary Table, 304 Guide Rail

[0041] 305 Clamping assembly; 306 First connecting plate

[0042] 307 Second connecting plate 308 Top mold

[0043] 309 Clamping mold displacement hydraulic cylinder; 310 Pipe joint displacement hydraulic cylinder

[0044] 311 Substrate displacement hydraulic cylinder; 312 Feeding and unloading hydraulic cylinder

[0045] 313 Fuel tank; 314 Fuel pump

[0046] 315 Oil pump drive unit; 316 First solenoid directional valve

[0047] 317 Second solenoid directional valve; 318 Third solenoid directional valve

[0048] 319 Fourth electromagnetic directional valve; 320 First hydraulic lock

[0049] 321 Second hydraulic lock 322 Third hydraulic lock

[0050] 323 Fourth hydraulic lock; 324 Check valve

[0051] 325 relief valve

[0052] 2001 Internal tapered joint; 2002 External tapered joint

[0053] 3081 Internal conical die; 3082 External conical die

[0054] 3081a Top mold cylindrical base section; 3081b Top mold conical insertion section

[0055] 3081c Top mold cylindrical insert section; 3082a Top mold cylindrical body

[0056] 3082b top mold tapered sleeve hole Detailed Implementation

[0057] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0059] In the embodiments of the present invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of the components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0060] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0061] Reference Figure 1 The first exemplary embodiment of the present invention provides a pipe structure docking and positioning device, which includes at least a worktable 301, a pipe positioning mechanism disposed on the worktable 301, and a pipe joint feeding mechanism disposed on the worktable 301.

[0062] Specifically, the pipe fitting positioning mechanism includes a clamping mold and a clamping mold displacement hydraulic cylinder 309. (Refer to...) Figure 4 and Figure 5 The clamping mold includes two clamping mating parts 305 arranged at intervals along a first direction. The distance between the two clamping mating parts 305 in the first direction is adjustable to position and clamp or release the pipe fitting 100. A clamping mold displacement hydraulic cylinder 309 is arranged along the first direction, specifically on the outer side of the clamping mating parts 305 along the first direction, and can drive the two clamping mating parts 305 to jointly position and clamp the pipe fitting 100.

[0063] Two clamping displacement hydraulic cylinders 309 can be provided. In this case, the two clamping displacement hydraulic cylinders 309 are respectively located on the outer side of the two clamping mating parts 305 along the first direction to drive the two clamping mating parts 305 to move respectively. Alternatively, one clamping displacement hydraulic cylinder 309 can be provided. In this case, the clamping displacement hydraulic cylinder 309 is located on the outer side of any clamping mating part 305 along the first direction to drive the clamping mating part 305 to move. When one clamping mating part 305 is driven to move by the clamping displacement hydraulic cylinder 309, the other clamping mating part 305 can be fixedly set, or synchronous displacement can be achieved by setting a synchronization mechanism between the two clamping mating parts 305.

[0064] The pipe fitting feeding mechanism includes a top mold 308 and a pipe fitting displacement hydraulic cylinder 310. The pipe fitting displacement hydraulic cylinder 310 is arranged along a second direction, with one end fixed and the other end being a telescopic movable end capable of displacement along the second direction. The top mold 308 is detachably connected to the telescopic movable end of the pipe fitting displacement hydraulic cylinder 310 and is used to detachably fix the pipe fitting 200 arranged along the second direction. By displacing the telescopic movable end of the pipe fitting displacement hydraulic cylinder 310 along the second direction, the top mold 308 and the pipe fitting 200 can be synchronously displaced along the second direction.

[0065] exist Figure 1 In this design, the first direction and the second direction are defined to be perpendicular to each other. Therefore, the pipe fitting 100, which is positioned and clamped by the two clamping parts 305, will be arranged along the second direction, and the pipe joint 200 can be displaced along the second direction. Thus, while the pipe fitting 100 is positioned, the pipe joint 200 and the pipe fitting 100 can be further positioned and connected coaxially. After the pipe joint 200 and the pipe fitting 100 are positioned and connected coaxially, the connection point of the pipe joint 200 and the pipe fitting 100 can be spot welded manually or automatically to fix the pipe joint 200 and the pipe fitting 100. Then, the clamping mold can be released and the top mold 308 can be removed from the pipe joint 200. The pipe structure composed of the pipe joint 200 and the pipe fitting 100 can be taken out from the pipe structure docking and positioning equipment and transferred to the welding station of the subsequent process for welding.

[0066] The extension and retraction movements of the clamping mold displacement hydraulic cylinder 309 and the pipe joint displacement hydraulic cylinder 310 are both controlled by the hydraulic control system, which can save a lot or completely eliminate manual operation.

[0067] With the above configuration, the two clamping mating parts 305 of the clamping mold of the pipe structure docking positioning equipment have adjustable spacing, allowing the clamping mold to match the pipe diameter of the pipe fitting 100 for precise positioning and clamping. The top mold 308 is detachable, making it easy to replace different models of top mold 308 to achieve precise positioning of different models of pipe joints 200. Therefore, both the clamping mold and the top mold 308 have the characteristics of flexibility and high-precision positioning. In addition, with the cooperation of a hydraulic control system and various hydraulic cylinders to control the displacement of the clamping mold and the top mold 308, a high degree of automation and high-precision operation can be achieved. Thus, the pipe structure docking positioning equipment of this exemplary embodiment is far superior to manual docking operations in terms of structural configuration and control method. It can effectively improve the coaxiality of the docking of the pipe joint 200 and the pipe fitting 100, ensure the welding fusion degree during subsequent welding, avoid welding fusion eccentricity, and reduce the risk of weld cracking and oil leakage. At the same time, it can effectively improve the docking efficiency of the pipe joint 200 and the pipe fitting 100, thereby effectively improving the overall manufacturing efficiency of the pipe structure.

[0068] Currently, the pipe fittings 200 used in the manufacture of welded hydraulic rigid pipes mainly include the internal tapered fitting 2001 (refer to...). Figure 8 ) and external tapered connector 2002 (refer to Figure 9 There are two types. The inner conical connector 2001 has a conical socket hole at its end and a cylindrical hole that communicates with the conical socket hole. The outer conical connector 2002 has a conical outer circumferential surface at its end.

[0069] To improve the versatility of the pipe structure docking and positioning equipment, for the docking and positioning operations of the inner tapered joint 2001 and the outer tapered joint 2002 with the pipe fitting 100, refer to Figure 6 and Figure 7 It is specially equipped with an inner conical top mold 3081 and an outer conical top mold 3082 that can be replaced and connected to the telescopic movable end of the pipe joint displacement hydraulic cylinder 310.

[0070] Specifically, the inner conical top mold 3081 includes a cylindrical base section 3081a, a conical insertion section 3081b, and a cylindrical insertion section 3081c connected sequentially along the axial direction. When the inner conical top mold 3081 is used to position the inner conical joint 2001, the inner conical top mold 3081 is integrally connected to the telescopic movable end of the pipe joint displacement hydraulic cylinder 310 through the cylindrical base section 3081a. The cylindrical insertion section 3081c can be inserted into the cylindrical hole of the inner conical joint 2001, and the conical insertion section 3081b can be inserted into the conical sleeve hole of the inner conical joint 2001. Under the positioning action of the conical insertion section 3081b and the cylindrical insertion section 3081c, it can be ensured that the axis of the inner conical joint 2001 does not shift after positioning, and the positioning accuracy is high.

[0071] The outer conical top mold 3082 includes a top mold cylindrical body 3082a and a top mold conical sleeve hole 3082b formed recessed in the end face of the top mold cylindrical body 3082a. When the outer conical top mold 3082 is used to position the outer conical joint 2002, the outer conical top mold 3082 is integrally connected to the telescopic movable end of the pipe joint displacement hydraulic cylinder 310 through the top mold cylindrical body 3082a. The top mold conical sleeve hole 3082b can sleeve and position the conical outer circumferential surface of the outer conical joint 2002. Under the positioning action of the top mold conical sleeve hole 3082b, it can be ensured that the axis of the outer conical top mold 3082 does not deviate after positioning, and the positioning accuracy is high.

[0072] The top mold 308 can be made of hard rubber or nylon. When positioning the pipe joint 200 through the top mold 308, the top mold 308 needs to be squeezed. At this time, the pipe joint 200 can be positioned according to the taper of the top mold 308, which is conducive to achieving the expected connection effect.

[0073] The connection between the top mold 308 and the telescopic movable end of the pipe joint displacement hydraulic cylinder 310 can be achieved by threaded connection or fixed by a set pin, etc., and this exemplary embodiment does not limit this.

[0074] On the other hand, for clamping molds, refer to Figure 5 V-shaped positioning grooves are formed on the outer wall areas of the two clamping mating parts 305 facing each other. At this time, the outer peripheral wall of the pipe fitting 100 can be positioned and clamped together by the inner walls of the two V-shaped positioning grooves, thereby ensuring that the axis of the pipe fitting 100 does not deviate after positioning and the positioning accuracy is high.

[0075] For example, pipe fitting 100 typically uses ordinary seamless pipe. The outer diameter tolerance of ordinary seamless pipe is ±0.3mm, and the out-of-roundness is no more than 80% of the outer diameter tolerance, i.e., less than 0.24mm. Through testing, when using... Figure 5When the clamping fitting 305 with V-shaped positioning groove is used, the center deviation of the pipe fitting 100 after positioning will not exceed 0.24mm, which means it has extremely high positioning accuracy.

[0076] In one embodiment, the action of removing the pipe structure from the pipe structure docking and positioning device can also be set to be performed automatically. For example, continuing to refer to Figure 1 The pipe structure docking and positioning equipment may also be equipped with a retraction and discharge substrate 302, a substrate displacement hydraulic cylinder 311, and a retraction and discharge hydraulic cylinder 312 to automatically discharge the pipe structure.

[0077] The ejector plate 302 is displaceably mounted on the worktable 301. Figure 1 Based on the premise that the first direction and the second direction are perpendicular to each other, the ejector plate 302 is disposed on the worktable 301 with displacement along the second direction. A pipe positioning mechanism is provided on the top surface of the ejector plate 302; that is, all components of the pipe positioning mechanism, such as the clamping mold and the clamping mold displacement hydraulic cylinder 309, are disposed on the top surface of the ejector plate 302. When the ejector plate 302 is displaced along the second direction, the entire pipe positioning mechanism is driven to displace along the second direction.

[0078] The substrate displacement hydraulic cylinder 311 can drive the retraction and displacement of the ejected substrate 302. Figure 1 Based on the premise that the first direction and the second direction are perpendicular to each other, the substrate displacement hydraulic cylinder 311 is arranged along the second direction, and the substrate displacement hydraulic cylinder 311 can drive the retraction and discharge substrate 302 to move along the second direction. In this way, driven by the substrate displacement hydraulic cylinder 311, the pipe fitting 100 and pipe joint 200 that have been spot-welded and fixed on the retraction and discharge substrate 302 can move along the second direction to enter the discharge area provided on the worktable 301. Before the substrate displacement hydraulic cylinder 311 drives the retraction and discharge substrate 302 to move, the top mold 308 needs to be disengaged from the pipe joint 200 to prevent the top mold 308 from affecting the displacement of the pipe structure.

[0079] In addition, the ejector hydraulic cylinder 312 is arranged in the first direction in the discharge zone. The ejector hydraulic cylinder 312 can push the spot-welded pipe fittings 100 and pipe joints 200 in the discharge zone outward, so that the spot-welded pipe fittings 100 and pipe joints 200 can be transferred to the subsequent process for welding.

[0080] By using a pipe structure docking and positioning device to further perform the unloading process after the pipe fitting 100 and pipe connector 200 are docked, the automation level of the equipment can be further improved, the operating efficiency can be increased, and manpower can be saved.

[0081] It should be noted that the clamping mold displacement hydraulic cylinder 309, the pipe joint displacement hydraulic cylinder 310, the substrate displacement hydraulic cylinder 311, and the retraction and feeding hydraulic cylinder 312 can all be controlled by the same hydraulic control system, which helps to simplify the configuration of the hydraulic control system and improve the response speed when multiple hydraulic cylinders work together.

[0082] Reference Figure 3 A hydraulic control system employing single-pump multi-cylinder control technology is provided. The hydraulic control system includes at least an oil tank 313, an oil pump 314, an oil pump drive device 315, a first hydraulic circuit equipped with a first electromagnetic directional valve 316, a second hydraulic circuit equipped with a second electromagnetic directional valve 317, a third hydraulic circuit equipped with a third electromagnetic directional valve 318, and a fourth hydraulic circuit equipped with a fourth electromagnetic directional valve 319.

[0083] The oil pump drive device 315 is connected to the oil pump 314 via a transmission connection. The oil pump drive device 315 can be a motor or other type of power device, providing power to drive the oil pump 314. The oil inlet end of the oil pump 314 is connected to the oil outlet end of the oil tank 313. The first hydraulic circuit is connected between the pipe joint displacement hydraulic cylinder 310 and the oil outlet end of the oil pump 314 and the oil return end of the oil tank 313. The second hydraulic circuit is connected between the base plate displacement hydraulic cylinder 311 and the oil outlet end of the oil pump 314 and the oil return end of the oil tank 313. The third hydraulic circuit is connected between the clamping mold displacement hydraulic cylinder 309 and the oil outlet end of the oil pump 314 and the oil return end of the oil tank 313. The fourth hydraulic circuit is connected between the retraction and discharge hydraulic cylinder 312 and the oil outlet end of the oil pump 314 and the oil return end of the oil tank 313. Therefore, during the operation of the oil pump, the pipe joint displacement hydraulic cylinder 310 can switch between extension and retraction actions by switching the first solenoid directional valve 316; the substrate displacement hydraulic cylinder 311 can switch between extension and retraction actions by switching the second solenoid directional valve 317; the clamping mold displacement hydraulic cylinder 309 can switch between extension and retraction actions by switching the third solenoid directional valve 318; and the retraction and discharge hydraulic cylinder 312 can switch between extension and retraction actions by switching the fourth solenoid directional valve 319. Thus, a single oil pump can drive multiple hydraulic cylinders to perform extension and retraction actions respectively.

[0084] Furthermore, the first hydraulic circuit includes a first hydraulic lock 320, located between the first solenoid directional valve 316 and the pipe joint displacement hydraulic cylinder 310. This lock ensures stable pressure in the pipe joint displacement hydraulic cylinder 310 and can lock it at any length during its extension / retraction. The second hydraulic circuit includes a second hydraulic lock 321, located between the second solenoid directional valve 317 and the base plate displacement hydraulic cylinder 311. This lock ensures stable pressure in the base plate displacement hydraulic cylinder 311 and can lock it at any length during its extension / retraction. The third hydraulic circuit includes a third hydraulic lock 322, located between the third solenoid directional valve 318 and the mold clamping displacement hydraulic cylinder 309. This lock ensures stable pressure in the mold clamping displacement hydraulic cylinder 309 and can lock it at any length during its extension / retraction. The fourth hydraulic circuit is equipped with a fourth hydraulic lock 323, which is located between the fourth solenoid directional valve 319 and the retraction and discharge hydraulic cylinder 312. It can ensure the pressure of the retraction and discharge hydraulic cylinder 312 is stable, and can lock the retraction and discharge hydraulic cylinder 312 at any length when the retraction and discharge hydraulic cylinder 312 forms a telescopic action.

[0085] It is evident that by setting multiple hydraulic locks, the pressure of multiple hydraulic cylinders can be kept stable. Furthermore, when combined with multiple solenoid directional valves, the sequence of extension and retraction actions of multiple hydraulic cylinders and the real-time length of multiple hydraulic cylinders can be precisely controlled.

[0086] On the other hand, a one-way valve 324 can be installed in the oil outlet pipeline of the oil pump 314, and the oil outlet pipeline and the oil return end of the oil tank 313 can be connected by a pressure relief return bypass equipped with an overflow valve 325, thereby effectively ensuring the pressure stability of the hydraulic control system.

[0087] When a check valve 324, a relief valve 325, and multiple hydraulic locks are simultaneously installed, the arrangement of the check valve 324, the relief valve 325, and the multiple hydraulic locks in different positions within the hydraulic control system enables multi-level pressure regulation of the hydraulic control system, thereby effectively ensuring stable system operation.

[0088] For the connection method between the clamping mating part 305 and the clamping mold displacement hydraulic cylinder 309, refer to Figure 1Firstly, two connecting plates can be installed in the pipe positioning mechanism, and the two connecting plates are respectively connected to two clamping mating parts 305. On this basis, when two clamping mold displacement hydraulic cylinders 309 are provided, the two clamping mold displacement hydraulic cylinders 309 are respectively fixed to the two connecting plates, so that the two clamping mating parts 305 can be driven to move respectively. When a clamping displacement hydraulic cylinder 309 is provided, the two connecting plates are respectively formed as a first connecting plate 306 and a second connecting plate 307. There are two scenarios: In the first scenario, the first connecting plate 306 is fixedly installed, and the telescopic movable end of the clamping displacement hydraulic cylinder 309 is fixed to the second connecting plate 307, thereby driving the second connecting plate 307 to move and adjusting the distance between the two clamping mating parts 305. In the second scenario, the telescopic movable end of the clamping displacement hydraulic cylinder 309 is fixed to the second connecting plate 307, and the two connecting plates are connected by a synchronization mechanism. Thus, under the drive of the clamping displacement hydraulic cylinder 309 and the transmission of the synchronization mechanism, the first connecting plate 306 and the second connecting plate 307 move synchronously, thereby adjusting the distance between the two clamping mating parts 305.

[0089] In addition, to improve the displacement stability of the clamping engagement 305, for example, if a feed-out platen 302 is provided, a guide groove arranged in the first direction can be formed on the feed-out platen 302, so that the clamping engagement 305 and the guide groove form a guiding engagement, ensuring that the clamping engagement 305 can only be displaced in the first direction, and ensuring clamping stability when positioning and clamping the tube 100.

[0090] As a functional extension, the pipe structure docking and positioning device can also achieve docking of the pipe joint 200 and the peripheral wall position of the pipe fitting 100, as described below. Figure 2 Please provide an explanation.

[0091] Specifically, the pipe structure docking and positioning equipment may further include a rotary table 303 rotatably mounted on the worktable 301. In this case, the ejector plate 302, the plate displacement hydraulic cylinder 311, and the ejector hydraulic cylinder 312 are all mounted on the rotary table 303. The rotation of the rotary table 303 drives the ejector plate 302, the plate displacement hydraulic cylinder 311, and the ejector hydraulic cylinder 312 to rotate synchronously, and the pipe positioning mechanism mounted on the ejector plate 302 also rotates synchronously. When the rotary table 303 rotates to the point where the first direction and the second direction are the same (i.e.,...), the pipe positioning mechanism is positioned to rotate synchronously. Figure 2 (As shown in the figure), the pipe joint 200 and the pipe fitting 100 can be connected at the peripheral wall position.

[0092] When a rotary table 303 is provided, the tube structure docking and positioning device can be equipped with a feeding and discharging sliding mechanism that connects the feeding and discharging plate 302 and the rotary table 303, allowing the feeding and discharging plate 302 to slide on the rotary table 303. For example, the tube structure docking and positioning device may include two guide rails 304 arranged parallel to each other on the rotary table 303, and the bottom surface of the feeding and discharging plate 302 may be provided with two sliding grooves (not shown in the figure) that respectively slide and engage with the two guide rails 304 to achieve sliding engagement between the feeding and discharging plate 302 and the rotary table 303. The cross-sectional shape of the guide rails can be T-shaped, V-shaped, triangular, dovetail-shaped, cylindrical, rectangular, etc., as long as it can achieve the guiding and auxiliary positioning functions.

[0093] Next, let's combine... Figure 1 This section introduces an optional docking and positioning operation process for pipe structure docking and positioning equipment, which requires sequential execution of steps a) to l), specifically:

[0094] a) Place the pipe fitting 100 between the two clamping parts 305 of the clamping mold, and expose the end of the pipe fitting 100 out of the clamping mold by a certain length;

[0095] b) Connect and fix the pipe fitting 200 to the top mold 308;

[0096] c) The two clamping mating parts 305 are driven by the clamping displacement hydraulic cylinder 309 to position and clamp the pipe fitting 100.

[0097] d) The pipe joint 200 is driven to be coaxially positioned and docked with the pipe fitting 100 by the pipe joint displacement hydraulic cylinder 310;

[0098] e) Spot weld the joint between the pipe fitting 100 and the pipe connector 200 to secure them;

[0099] f) Drive the top mold 308 to disengage from the pipe joint 200 via the pipe joint displacement hydraulic cylinder 310;

[0100] g) The substrate 302 is pushed toward the discharge area by the substrate displacement hydraulic cylinder 311;

[0101] h) The clamping displacement hydraulic cylinder 309 drives the two clamping mating parts 305 to loosen the pipe fitting 100 that has been spot-welded to the pipe joint 200;

[0102] i) The retracting base plate displacement hydraulic cylinder 311 causes the spot-welded and fixed pipe fittings 100 and pipe joints 200 to move out of the clamping mold and into the discharge area under inertia.

[0103] j) The spot-welded pipe fittings 100 and pipe joints 200 are pushed outward by the back-feeding hydraulic cylinder 312;

[0104] k) Return and feed hydraulic cylinder 312;

[0105] l) Remove the spot-welded and fixed pipe fitting 100 and pipe joint 200 to complete one coaxial docking and positioning operation.

[0106] A second exemplary embodiment of the present invention also provides a pipe structure production line, including the above-described pipe structure docking and positioning equipment.

[0107] In one embodiment, the pipe structure production line may further include automatic spot welding equipment (e.g., a spot welding robot), which is used to spot weld and fix the pipe fitting 100 and pipe joint 200, which are coaxially positioned and connected in the pipe structure docking and positioning equipment. Thus, throughout the entire process of the pipe fitting 100 and pipe joint 200 being placed into and removed from the pipe structure docking and positioning equipment, no manual intervention is required for the docking and positioning operations and spot welding operations, further improving the automation level and operational efficiency of the pipe structure production line, while completely eliminating manpower and saving costs.

[0108] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0109] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0110] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A pipe structure butt joint positioning device, comprising: a workbench (301) ; a pipe positioning mechanism arranged on the workbench (301) and comprising a clamp die and a clamp die displacement hydraulic cylinder (309), the clamp die comprising two clamping fittings (305) arranged at intervals along a first direction, the clamp die displacement hydraulic cylinder (309) being arranged along the first direction and capable of driving the two clamping fittings (305) to jointly position and clamp a pipe (100) ; a pipe joint feeding mechanism arranged on the workbench (301) and comprising a top die (308) and a pipe joint displacement hydraulic cylinder (310), the top die (308) being detachably connected to a telescopic active end of the pipe joint displacement hydraulic cylinder (310) and used for detachably fixing a pipe joint (200) arranged along a second direction, the pipe joint displacement hydraulic cylinder (310) being arranged along the second direction and capable of driving the pipe joint (200) to butt joint with the pipe (100) ; and a hydraulic control system capable of controlling the clamp die displacement hydraulic cylinder (309) and the pipe joint displacement hydraulic cylinder (310) to form telescopic actions respectively; the pipe structure butt joint positioning device further comprising: a feeding and discharging base plate (302) arranged displaceably on the workbench (301), a top surface of the feeding and discharging base plate (302) being provided with the pipe positioning mechanism; a base plate displacement hydraulic cylinder (311) capable of driving the feeding and discharging base plate (302) to displace so that the pipe (100) and the pipe joint (200) fixed by spot welding enter a discharging area arranged on the workbench (301) ; a feeding and discharging hydraulic cylinder (312) arranged along the first direction in the discharging area and capable of pushing the pipe (100) and the pipe joint (200) fixed by spot welding in the discharging area outwards; a rotary table (303) arranged rotatably on the workbench (301), the feeding and discharging base plate (302), the base plate displacement hydraulic cylinder (311) and the feeding and discharging hydraulic cylinder (312) being arranged on the rotary table (303).

2. The pipe structure butt positioning apparatus according to claim 1, wherein the top die (308) comprising an inner taper top die (3081) and an outer taper top die (3082) detachably connected to a telescopic active end of the pipe joint displacement hydraulic cylinder (310) ; the inner taper top die (3081) comprising a top die cylindrical base segment (3081a), a top die taper plug-in segment (3081b) and a top die cylindrical plug-in segment (3081c) connected in sequence along an axial direction, the top die cylindrical plug-in segment (3081c) being capable of being plugged and positioned in a joint cylindrical hole of an inner taper joint (2001), the top die taper plug-in segment (3081b) being capable of being plugged and positioned in a joint taper sleeve hole of the inner taper joint (2001) ; The outer cone top die (3082) comprises a top die cylindrical body (3082a) and a top die conical sleeve hole (3082b) recessed in the end face of the top die cylindrical body (3082a), which can be sleeved and positioned with the joint conical outer peripheral surface of the outer cone joint (2002).

3. The pipe structure butt positioning apparatus according to claim 1, wherein The outer wall regions of the two clamping fittings (305) towards each other are each formed with a V-shaped positioning groove, and the outer peripheral wall of the pipe fitting (100) can be jointly positioned and clamped by the groove inner walls of the two V-shaped positioning grooves.

4. The pipe structure butt positioning apparatus according to claim 1, wherein The discharge base plate (302) is formed with a guide groove arranged along the first direction, and the clamping fitting (305) forms a guide fitting with the guide groove.

5. The pipe structure docking positioning apparatus according to claim 1, wherein, The hydraulic control system comprises an oil tank (313), an oil pump (314), an oil pump driving device (315), a first hydraulic circuit provided with a first electromagnetic reversing valve (316), a second hydraulic circuit provided with a second electromagnetic reversing valve (317), a third hydraulic circuit provided with a third electromagnetic reversing valve (318), and a fourth hydraulic circuit provided with a fourth electromagnetic reversing valve (319). The oil pump driving device (315) is in driving connection with the oil pump (314), the oil inlet end of the oil pump (314) is connected with the oil outlet end of the oil tank (313), the first hydraulic circuit is connected between the pipe joint displacement hydraulic cylinder (310) and the oil outlet end of the oil pump (314) and the oil return end of the oil tank (313), the second hydraulic circuit is connected between the base plate displacement hydraulic cylinder (311) and the oil outlet end of the oil pump (314) and the oil return end of the oil tank (313), the third hydraulic circuit is connected between the die clamping displacement hydraulic cylinder (309) and the oil outlet end of the oil pump (314) and the oil return end of the oil tank (313), and the fourth hydraulic circuit is connected between the discharge base plate displacement hydraulic cylinder (312) and the oil outlet end of the oil pump (314) and the oil return end of the oil tank (313).

6. The pipe structure docking positioning apparatus according to claim 5, wherein, The first hydraulic circuit is provided with a first hydraulic lock (320), which is located between the first electromagnetic reversing valve (316) and the pipe joint displacement hydraulic cylinder (310); the second hydraulic circuit is provided with a second hydraulic lock (321), which is located between the second electromagnetic reversing valve (317) and the base plate displacement hydraulic cylinder (311); the third hydraulic circuit is provided with a third hydraulic lock (322), which is located between the third electromagnetic reversing valve (318) and the die clamping displacement hydraulic cylinder (309); and the fourth hydraulic circuit is provided with a fourth hydraulic lock (323), which is located between the fourth electromagnetic reversing valve (319) and the discharge base plate displacement hydraulic cylinder (312).

7. The pipe structure docking positioning apparatus of claim 1, wherein, The pipe positioning mechanism comprises two connecting plates connected with the two clamping fittings (305) respectively, and a synchronization mechanism connected between the two connecting plates, and any one of the two connecting plates is fixed with the telescopic end of the die displacement hydraulic cylinder (309).

8. A pipe structure production line comprising the pipe structure butt positioning device according to any one of claims 1 to 7.

9. The pipe structure production line according to claim 8, characterized by The pipe structure production line further comprises: An automatic spot welding device for spot welding and fixing the butt joint of the pipe (100) and the pipe joint (200) coaxially positioned and butt jointed in the pipe structure butt positioning device.

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