Hydraulic forming machine for bimetallic composite pipe

Abstract

The present application relates to the technical field of hydraulic forming machine, propose a kind of bimetallic composite pipe fittings hydraulic forming machine, including hydraulic forming machine body, the lower mould of fixed installation and the upper mould of sliding arrangement are arranged on hydraulic forming machine body, still include water supply insert tube and abutment socket, the both sides of hydraulic forming machine body are provided with water supply insert tube, position adjusting mechanism is arranged between water supply insert tube and hydraulic forming machine body, position adjusting mechanism is used to adjust the longitudinal and lateral position of water supply insert tube, drives water supply insert tube to move to base pipe fitting, abutment socket is connected in the side of water supply insert tube close to composite pipe fitting, abutment socket enters to base pipe fitting, and abut with corrosion-proof pipe fitting. Through the above technical scheme, solve the problem that bimetallic composite pipe fittings forming process in prior art, when the distance between corrosion-resistant metal material and base metal pipe fitting end is long, it is prone to cause corrosion-resistant metal material deformation in hydraulic forming process.

Description

Technical Field

[0001] This invention relates to the field of hydraulic forming machine technology, specifically to a hydraulic forming machine for bimetallic composite pipe fittings. Background Technology

[0002] Hydraulic forming machines are existing technologies that use liquid as a pressure medium to extrude and form metal workpieces in a mold. In actual use, the metal workpiece to be formed is first placed between the upper and lower molds. Then, the sealing pipe ends on both sides are sealed to the two sides of the metal workpiece. Liquid is injected into the metal workpiece through the sealing pipe ends. Then, under the control of the liquid pressure inside the metal workpiece, the liquid extrudes the metal workpiece to fit against the side wall of the mold, thus completing the forming operation of the metal workpiece.

[0003] In the application of hydraulic forming machines, they are also often used to perform hydraulic forming operations on bimetallic composite pipes. Bimetallic composite pipes are made by installing a layer of anti-corrosion metal material inside a base metal pipe to improve the durability of the metal pipe. In the existing technology, during the hydraulic forming process of bimetallic composite pipes, the anti-corrosion metal material is fitted inside the base metal pipe, and then the composite pipe is installed in the hydraulic forming machine for hydraulic forming operations.

[0004] However, in actual hydraulic forming operations of composite pipe fittings, the anti-corrosion metal material pipe fitting does not completely cover the interior of the base metal pipe fitting. Often, the anti-corrosion metal material covers the middle area inside the base metal pipe fitting, leaving areas for subsequent processing and on-site installation on both sides of the base metal pipe fitting. However, since the sealing pipe end only fits and seals with both ends of the base metal pipe fitting, when the distance between the anti-corrosion metal material and the end of the base metal pipe fitting is relatively long, the resulting hydraulic pressure can easily cause the anti-corrosion metal material pipe fitting to deform inside the base metal pipe section. Summary of the Invention

[0005] This invention proposes a hydraulic forming machine for bimetallic composite pipe fittings, which solves the problem in the prior art that the corrosion-resistant metal material is prone to deformation during the hydraulic forming process when the distance between the corrosion-resistant metal material and the end of the base metal pipe fitting is long.

[0006] The technical solution of the present invention is as follows: A bimetallic composite material pipe fitting hydraulic forming machine includes a hydraulic forming machine body, wherein a lower mold fixedly installed and an upper mold slidably installed are provided on the hydraulic forming machine body, and further includes:

[0007] Water supply plugs are provided on both sides of the hydraulic forming machine body. A position adjustment mechanism is provided between the water supply plugs and the hydraulic forming machine body. The position adjustment mechanism is used to adjust the longitudinal and lateral positions of the water supply plugs and drive the water supply plugs to move into the base pipe fitting.

[0008] Abutting socket is connected to the side of the water supply socket near the composite pipe fitting, and the abutting socket enters into the base pipe fitting and abuts against the anti-corrosion pipe fitting;

[0009] A sealing ring sleeve is slidably provided on the outer side of the water supply cylinder. The sealing ring sleeve abuts against the side end of the base pipe fitting. The sealing ring sleeve also has the function of draining liquid after hydraulicing is completed.

[0010] A spiral sealing structure is provided between the outer side of the contact socket and the water supply cylinder, which is used to seal the side end between the anti-corrosion pipe fitting and the base pipe fitting;

[0011] A bidirectional liquid supply structure is provided, wherein the water supply plug and the spiral sealing structure are connected by the bidirectional liquid supply structure, and liquid is supplied to the water supply plug and the spiral sealing structure respectively.

[0012] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine, wherein the middle part of the water supply cylinder is provided as a metal corrugated pipe section, so that when the water supply cylinder moves into the base pipe fitting, it adapts to the inner cavity shape of the base pipe fitting.

[0013] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine. The position adjustment mechanism includes a through slide and a transverse screw. The through slide is fixedly connected to the body of the hydraulic forming machine. A mounting box is longitudinally slidably arranged inside the through slide. A screw lifting structure that drives the mounting box to move longitudinally is arranged inside the through slide. The transverse screw is transversely driven inside the mounting box. One end of the transverse screw is fixedly connected to the water supply cylinder, pushing the water supply cylinder to move into the base pipe fitting.

[0014] At least one embodiment of the present invention provides a hydraulic forming machine for bimetallic composite pipe fittings. An annular corrugated sleeve is provided on the side of the sealing ring sleeve near the abutment socket. One end of the annular corrugated sleeve near the abutment socket is designated as an abutment ring surface, which abuts against the side end of the base pipe fitting. Multiple water inlet holes are formed along a semi-circular path at the bottom of the end of the sealing ring sleeve near the annular corrugated sleeve. When the annular corrugated sleeve extends or retracts, it closes the water inlet holes. A liquid extraction pipe is connected to the top of the sealing ring sleeve, and arc-shaped suction pipes are connected to both sides of the bottom of the liquid extraction pipe.

[0015] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine, wherein multiple abutment grooves are fixedly connected to both sides of the sealing ring sleeve, and multiple abutment blocks are fixedly connected to the side of the abutment socket near the sealing ring sleeve, and the abutment blocks abut against the abutment grooves.

[0016] At least one embodiment of the present invention provides a hydraulic forming machine for bimetallic composite pipe fittings. The water supply cylinder is fixedly fitted with an installation ring plate on the side near the transverse screw. A damping slide rod is fixedly connected to the bottom of the sealing ring on the side near the installation ring plate. The damping slide rod is slidably connected to the bottom of the installation ring plate. After the abutting ring surface abuts against the base pipe fitting, when the installation ring plate moves toward the base pipe fitting, it generates a pushing force on the sealing ring in the direction of the base pipe fitting.

[0017] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine, wherein a spacing adjustment component is provided on the side of the mounting ring plate near the sealing ring sleeve, and an abutting ring plate is provided on the other side of the spacing adjustment component, and an abutting protrusion that cooperates with the abutting groove is provided on the circumference of the abutting ring plate.

[0018] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine. The spiral sealing structure includes a spiral infusion pipeline and a supporting spiral plate. The spiral infusion pipeline is sleeved on the outside of the water supply cylinder. An expansion layer is provided on the outer arc surface of the spiral infusion pipeline. After the liquid enters the spiral infusion pipeline, the expansion layer expands and contacts the inner wall of the base pipe fitting. The supporting spiral plate is fixedly connected to the outer wall of the spiral infusion pipeline.

[0019] At least one embodiment of the present invention provides a bimetallic composite material pipe fitting hydraulic forming machine. The bidirectional liquid supply structure includes an annular water cylinder and a three-way pipe. The annular water cylinder is fixedly sleeved on the water supply sleeve. The spiral liquid delivery pipe is connected to the annular water cylinder. The three-way pipe includes two liquid delivery ports. The two liquid delivery ports are respectively connected to the annular water cylinder and the water supply sleeve. Each of the two liquid delivery ports is provided with a closing valve.

[0020] At least one embodiment of the present invention provides a bimetallic composite pipe fitting hydraulic forming machine. The spacing adjustment component includes a sliding cylinder, a meshing slot, and a sliding rod. Two sliding cylinders are symmetrically arranged on the side of the mounting ring plate near the abutting ring plate. The top of the sliding cylinder is a transparent layer, and multiple distance calibration points are equidistantly arranged at the bottom of the transparent layer. Multiple meshing slots are fixedly connected equidistantly at the bottom of the sliding cylinder, and the meshing slots correspond one-to-one with the distance calibration points. The abutting ring plate is slidably connected to the sliding cylinder through the sliding rod. A spring damper is provided between the sliding rod and the abutting ring plate. Two arc-shaped rods are provided at one end of the sliding rod, and the arc-shaped rods mesh with the corresponding meshing slots.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. In this invention, when it is necessary to hydraulically form the anti-corrosion pipe fitting inside the already formed base pipe fitting, the anti-corrosion pipe fitting is first moved into the base pipe fitting, and then the base pipe fitting is moved between the upper and lower molds. Then, the drilling position of the water supply cylinder is adjusted to correspond to the side end of the base pipe fitting. Then, the water supply cylinder, the abutment socket, and the sealing ring are moved towards the position of the base pipe fitting. First, the abutment socket is moved into the base pipe fitting. Using the abutment sockets on both sides that are symmetrical, the position of the anti-corrosion pipe fitting inside the base pipe fitting is determined. The sealing ring is used to keep the side end of the base pipe section sealed, and a spiral sealing structure is used to seal the area of ​​the anti-corrosion pipe fitting away from the port of the base pipe fitting to prevent the anti-corrosion pipe fitting from shifting under hydraulic pressure. Then, under the premise of ensuring accurate positioning of the anti-corrosion pipe fitting, the anti-corrosion pipe fitting and the base pipe fitting are hydraulically formed together, which helps to improve the finished product quality of the anti-corrosion pipe fitting and the base pipe fitting formed into composite material pipe fittings.

[0023] 2. In this invention, after the hydraulic forming operation, the remaining hydraulic water inside the base pipe can be discharged through the sealing ring, effectively ensuring the sealing of the hydraulic water discharge and ensuring the recycling rate of the hydraulic water. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention;

[0027] Figure 3 This is a partial cross-sectional view of the structure of the through slide, mounting box, water supply cylinder, contact socket and sealing ring in this invention;

[0028] Figure 4 This is a partial cross-sectional view of the installation chassis, water supply inlet, contact socket, sealing ring, and transverse screw in this invention, showing their cooperation from another perspective.

[0029] Figure 5 This is a partial cross-sectional structural diagram of the sealing ring sleeve, annular corrugated sleeve, abutting ring surface, water inlet hole, liquid extraction pipe, arc-shaped suction pipe, and abutting groove in this invention.

[0030] Figure 6 This is a partial cross-sectional structural diagram showing the cooperation of the water supply plug, the contact socket, the mounting ring plate, the spiral infusion pipeline, the expansion layer, and the supporting spiral plate in this invention.

[0031] Figure 7 This is a partial cross-sectional view of the structure of the mating ring plate and the spacing adjustment structure in this invention;

[0032] Figure 8 For the present invention Figure 7 A magnified structural diagram of point A in the middle.

[0033] In the diagram: 1. Hydraulic forming machine body; 2. Lower mold; 3. Upper mold; 4. Water supply inlet; 5. Abutment socket; 6. Sealing ring; 7. Corrugated metal pipe section; 8. Through slide block; 9. Mounting chassis; 10. Screw lifting structure; 11. Transverse screw; 12. Annular corrugated pipe sleeve; 13. Abutment ring surface; 14. Water inlet; 15. Liquid suction pipe; 16. Arc-shaped suction pipe; 17. Abutment groove; 18. Abutment block; 19. Mounting ring plate; 20. Damping slide bar 21. Abutting ring plate; 22. Abutting protrusion; 23. Spiral infusion tubing; 24. Expansion layer; 25. Supporting spiral plate; 26. Annular water cylinder; 27. T-junction tubing; 28. Infusion port; 29. ​​Sliding insert; 30. Transparent layer; 31. Distance calibration point; 32. Engaging slot; 33. Sliding insert; 34. Spring damper; 35. Arc-shaped insert; 36. Threaded sleeve seat; 37. Fixed slide plate; 38. Drive motor; 39. Transmission gear. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 2As shown, this embodiment proposes a hydraulic forming machine for bimetallic composite pipe fittings, including a hydraulic forming machine body 1. The hydraulic forming machine body 1 is provided with a fixedly installed lower mold 2 and a slidably installed upper mold 3. In the prior art, a press device is provided on the top of the hydraulic forming machine body 1, and the upper mold 3 is installed on the output end of the press device. The combined inner cavity shape of the upper mold 3 and the lower mold 2 is consistent with the forming shape of the basic pipe fitting, thereby providing external pressure for the hydraulic forming of the basic pipe fitting and the anti-corrosion pipe fitting. The operating principle of the hydraulic forming machine body 1, the upper mold 3 and the lower mold 2 are all prior art known to those skilled in the art.

[0036] like Figures 1 to 7 As shown, in this embodiment, a water supply cylinder 4 is also included. Water supply cylinders 4 are provided on both sides of the hydraulic forming machine body 1. A position adjustment mechanism is provided between the water supply cylinder 4 and the hydraulic forming machine body 1. The position adjustment mechanism is used to adjust the longitudinal and lateral positions of the water supply cylinder 4, driving the water supply cylinder 4 to move into the base pipe fitting. The middle part of the water supply cylinder 4 is provided as a metal corrugated pipe section 7, so that when the water supply cylinder 4 moves into the base pipe fitting, it adapts to the inner shape of the base pipe fitting. Because the base pipe fitting may have a certain curvature, and there may be a slight misalignment problem when the water supply cylinder 4 is driven into the base pipe fitting, by taking the metal corrugated pipe section 7, the deformable characteristics of the metal corrugated pipe section 7 are utilized to allow the water supply cylinder 4 to smoothly drill into the base pipe fitting.

[0037] Furthermore, the position adjustment mechanism includes a through slide 8 and a transverse screw 11. The through slide 8 is fixedly connected to the body 1 of the hydraulic forming machine. A mounting housing 9 is longitudinally slidably arranged inside the through slide 8. A screw lifting structure 10 that drives the mounting housing 9 to move longitudinally is arranged inside the through slide 8. A transverse screw 11 is transversely driven inside the mounting housing 9. One end of the transverse screw 11 is fixedly connected to the water supply cylinder 4, pushing the water supply cylinder 4 to move into the base pipe fitting. A threaded cylinder seat 36 is rotatably connected to the mounting housing 9. The transverse screw 11 is threadedly connected to the threaded cylinder seat 36. Slide grooves are opened on both sides of the transverse screw 11. A fixed sliding plate 37 that is slidably connected to the slide grooves is fixedly connected to the mounting housing 9. The mounting housing 9 is equipped with... A drive motor 38 is provided, and transmission gears 39 are fixedly sleeved on the output end of the drive motor 38 and the outer wall of the threaded cylinder seat 36. The two transmission gears 39 mesh. When it is necessary to adjust the horizontal height of the water supply cylinder 4 so that the water supply cylinder 4 corresponds to the side end of the base pipe placed between the upper mold 3 and the lower mold 2, the height of the mounting box 9 and the water supply cylinder 4 can be adjusted by the screw lifting structure 10 driven by the motor. Then, the drive motor 38 is started, and the threaded cylinder seat 36 is driven to rotate through the meshing relationship of the two transmission gears 39. Due to the sliding connection between the fixed slide plate 37 and the transverse screw 11, the transverse screw 11 is driven to move laterally, so as to realize the conveying operation of the water supply cylinder 4 into the base pipe.

[0038] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in this embodiment, the abutment socket 5 is connected to the side of the water supply cylinder 4 near the composite pipe. The abutment socket 5 enters the base pipe and abuts against the anti-corrosion pipe. During the process of moving the water supply cylinder 4 into the base pipe, the abutment socket 5 first enters the base pipe. After the anti-corrosion pipe is inserted into the base pipe, in order to determine the actual position of the anti-corrosion pipe in the base pipe, an abutment socket 5 corresponding to the inner wall diameter of the base pipe can be selected. After the abutment socket 5 is moved into the base pipe, the outer wall of the abutment socket 5 abuts against the anti-corrosion pipe, and the forming position of the anti-corrosion pipe is determined.

[0039] like Figures 3 to 5As shown, in this embodiment, a sealing ring 6 is slidably provided on the outer side of the water supply sleeve 4. The sealing ring 6 abuts against the side end of the base pipe fitting. The sealing ring 6 also has a drainage function after hydraulic pressure is completed. An annular corrugated sleeve 12 is provided on the side of the sealing ring 6 near the abutment socket 5. The end of the annular corrugated sleeve 12 near the abutment socket 5 is provided as an abutment ring surface 13, which abuts against the side end of the base pipe fitting. The bottom of the end of the sealing ring 6 near the annular corrugated sleeve 12 is provided with multiple water inlet holes 14 along a semi-circular path. When the annular corrugated sleeve 12 extends or retracts, it closes the water inlet holes 14. The top of the sealing ring 6 is connected to a pump. Both sides of the bottom of the liquid pipe 15 and the suction pipe 15 are connected to arc-shaped suction pipes 16, which seal the side end of the base pipe fitting, so that the inside of the base pipe fitting and the anti-corrosion pipe fitting are hydraulically formed together. Under the drive of the water supply plug 4, the contact socket 5 enters the inside of the base pipe fitting, and the sealing ring sleeve 6 moves towards the base pipe fitting. Then, the contact ring surface 13 on the annular corrugated sleeve 12 fits against the side end of the base pipe fitting, so that the annular corrugated pipe is compressed to seal the water inlet hole 14. During the hydraulic forming process, the contact ring surface 13 is used to seal the inside of the base pipe fitting, so that the base pipe fitting and the anti-corrosion pipe fitting are hydraulically formed together.

[0040] Furthermore, after the hydraulic forming of the base pipe fittings and anti-corrosion pipe fittings is completed, when the contact socket 5 and water supply cylinder 4 are moved out of the base pipe fittings, the hydraulic water inside the base pipe fittings and anti-corrosion pipe fittings needs to be treated. When the sealing ring sleeve 6 moves slightly towards the mounting box 9, the annular corrugated sleeve 12 expands slightly, and the contact ring surface 13 also abuts against the side end of the base pipe fitting, keeping the interior of the base pipe fitting closed to the external environment. The water inlet hole 14 is connected to the internal area of ​​the base pipe fitting, and the hydraulic water can enter the sealing ring sleeve 6 through the water inlet hole 14. Then, an external water pump or other liquid conveying equipment is used to connect with the liquid extraction pipe 15 to effectively extract the hydraulic water in the sealing ring sleeve 6.

[0041] Furthermore, during the process of extracting hydraulic water from the sealing ring sleeve 6, the hydraulic water at the bottom of the sealing ring sleeve 6 is sucked out through the arc-shaped suction pipes 16 on both sides, which facilitates the discharge effect of hydraulic water inside the sealing ring sleeve 6, and the shape of the arc-shaped suction pipes 16 corresponds to the inner cavity shape of the sealing ring sleeve 6.

[0042] like Figures 3 to 7As shown, in this embodiment, multiple abutment grooves 17 are fixedly connected to both sides of the sealing ring sleeve 6, and multiple abutment blocks 18 are fixedly connected to the side of the abutment socket 5 near the sealing ring sleeve 6. The abutment blocks 18 abut against the abutment grooves 17. During the process of the water supply tube 4 moving outward from the base pipe fitting, it is difficult to ensure the stable movement of the sealing ring sleeve 6 by the damping friction between the damping slide rod 20 and the mounting ring plate 19. When the abutment socket 5 moves to the side near the sealing ring sleeve 6, the abutment blocks 18 enter the abutment grooves 17, so that when the abutment socket 5 moves laterally, it drives the water supply tube 4 to move laterally with the abutment socket 5.

[0043] Furthermore, an installation ring plate 19 is fixedly sleeved on the side of the water supply cylinder 4 near the transverse screw 11, and a damping slide rod 20 is fixedly connected to the bottom of the sealing ring sleeve 6 near the installation ring plate 19. The damping slide rod 20 is slidably connected to the bottom of the installation ring plate 19. After the abutting ring surface 13 abuts against the base pipe fitting, when the installation ring plate 19 moves towards the base pipe fitting, it generates a pushing force on the sealing ring sleeve 6 towards the base pipe fitting. After the annular corrugated sleeve 12 on the sealing ring sleeve 6 abuts against the base pipe fitting, during the process of the water supply cylinder 4 moving towards the base pipe fitting, the damping friction between the installation ring plate 19 and the damping slide rod 20 pushes the sealing ring sleeve 6 towards the base pipe fitting, thereby improving the abutting effect between the annular corrugated sleeve 12 and the base pipe fitting.

[0044] like Figures 3 to 8 As shown, in this embodiment, a spacing adjustment component is provided on the side of the mounting ring plate 19 near the sealing ring sleeve 6, and an abutment ring plate 21 is provided on the other side of the spacing adjustment component. The abutment ring plate 21 has abutment protrusions 22 on its circumference that cooperate with the abutment groove 17. After the annular corrugated sleeve 12 on the sealing ring sleeve 6 is attached to the base pipe fitting, the sealing ring sleeve 6 stops moving. During the subsequent process of the water supply cylinder 4 continuing to move into the base pipe fitting, the abutment ring plate 21 is finally made to abut against the side wall of the sealing ring sleeve 6 through the abutment protrusions 22, completely abutting against the annular corrugated sleeve 12 on the sealing ring sleeve 6 and sealing against the base pipe fitting, increasing the stability of the annular corrugated sleeve 12 sealing against the base pipe fitting.

[0045] The spacing adjustment assembly includes sliding inserts 29, engaging slots 32, and sliding rods 33. Two sliding inserts 29 are symmetrically arranged on the side of the mounting ring plate 19 near the abutting ring plate 21. The top of each sliding insert 29 is a transparent layer 30, and the bottom of the transparent layer 30 has multiple distance calibration points 31 equidistantly arranged. Multiple engaging slots 32 are fixedly connected equidistantly to the bottom of each sliding insert 29, with each engaging slot 32 corresponding to one of the distance calibration points 31. The abutting ring plate 21 slides via the sliding rods 33. The sliding sleeve 29 is dynamically connected to the sliding plug 33. A spring damper 34 is provided between the sliding plug 33 and the abutment ring plate 21. Two arc-shaped plugs 35 are provided at one end of the sliding plug 33. The arc-shaped plugs 35 engage with the corresponding engagement slots 32. When the abutment ring plate 21 is needed to abut the sealing ring sleeve 6, the moving distance of the water supply plug 4 needs to be determined according to the length of the base pipe fitting being processed. Therefore, after the moving distance of the water supply plug 4 is determined, it is necessary to connect the sealing ring sleeve 6 and the base pipe fitting. After the side ends are fitted together, the distance between the abutment ring plate 21 and the sealing ring sleeve 6 is determined to ensure that there is no excessive contact between the abutment ring plate 21 and the sealing ring sleeve 6 after the water supply cylinder 4 moves the abutment ring plate 21. After determining the specific distance requirement between the abutment ring plate 21 and the sealing ring sleeve 6, the sliding rod 33 is moved to slide inside the sliding cylinder 29 to adjust the position of the abutment ring plate 21. Based on the distance calibration point 31, the distance between the abutment ring plate 21 and the sliding rod can be determined. The sliding rod 33 moves a distance, and after moving to the corresponding position, the bottom of the arc-shaped rod 35 is inserted into the engagement slot 32 corresponding to the distance calibration point 31 by moving the arc-shaped rod 35, so that the sliding rod 33 is fixed in the sliding sleeve 29. In addition, by using the spring damper 34, not only can the contact stability between the abutment ring plate 21 and the sealing ring sleeve 6 be increased, but the retractable characteristic of the spring damper 34 can also be used to adapt to the error after the abutment ring plate 21 is adjusted.

[0046] like Figure 3 , Figure 4 and Figure 6As shown, in this embodiment, a spiral sealing structure is provided between the outer side of the contact socket 5 and the water supply cylinder 4 to seal the side end between the anti-corrosion pipe and the base pipe. The spiral sealing structure includes a spiral infusion pipeline 23 and a supporting spiral plate 25. The spiral infusion pipeline 23 is sleeved on the outer side of the water supply cylinder 4. An expansion layer 24 is provided on the outer arc surface of the spiral infusion pipeline 23. After the liquid enters the spiral infusion pipeline 23, the expansion layer 24 expands and contacts the inner wall of the base pipe. The supporting spiral plate 25 is fixedly connected to the outer wall of the spiral infusion pipeline 23, which pushes the contact socket 5 towards the base. During the movement within the pipe fitting, the spiral infusion line 23 also enters the base pipe fitting. The spiral infusion line 23 is located in the area between the anti-corrosion pipe fitting and the port of the base pipe fitting. Then, by injecting water into the spiral infusion line 23, the expansion layer 24 expands and contacts the inner wall of the base pipe fitting, thereby sealing the area between the anti-corrosion pipe fitting and the port of the base pipe fitting. This determines the flow area of ​​hydraulic water within the base pipe fitting, facilitating the hydraulic forming operation of the anti-corrosion pipe fitting onto the base pipe fitting. The supporting spiral plate 25 is provided for the installation of the spiral infusion line 23.

[0047] like Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, a bidirectional liquid supply structure connects the water supply cylinder 4 and the spiral sealing structure, supplying liquid to both the water supply cylinder 4 and the spiral sealing structure respectively. The bidirectional liquid supply structure includes an annular water cylinder 26 and a three-way pipe 27. The annular water cylinder 26 is fixedly sleeved on the water supply cylinder 4. The spiral liquid supply pipe 23 is connected to the annular water cylinder 26. The three-way pipe 27 includes two liquid supply ports 28, which are respectively connected to the annular water cylinder 26 and the water supply cylinder 4. Each of the two liquid supply ports 28 is equipped with a closing valve, which allows liquid to be supplied to either the water supply cylinder 4 or the annular water cylinder 26 when needed. When adding hydraulic water into the water cylinder 26, connect the external hydraulic water circulation device to the inlet port of the three-way pipe 27. Then, through the three-way pipe 27, hydraulic water can be added to the water supply cylinder 4 or the annular water cylinder 26 through the two infusion ports 28. By controlling the opening and closing of the closing valve, the water supply cylinder 4 or the annular water cylinder 26 can be closed to ensure that the pressure inside the water supply cylinder 4 or the annular water cylinder 26 is constant. Then, the hydraulic water in the water supply cylinder 4 or the annular water cylinder 26 can be extracted and reused through the cooperation of the hydraulic water circulation device and the three-way pipe 27.

[0048] Working principle of the bimetallic composite pipe forming machine:

[0049] When it is necessary to hydraulically form the anti-corrosion pipe fitting inside the already formed base pipe fitting, firstly, the anti-corrosion pipe fitting is moved into the base pipe fitting, and then the base pipe fitting is moved between the upper mold 3 and the lower mold 2. Then, the drilling position of the water supply cylinder 4 is adjusted to correspond to the side end of the base pipe fitting. Then, the water supply cylinder 4, the abutment socket 5, and the sealing ring 6 are moved towards the position of the base pipe fitting. First, the abutment socket 5 is moved into the base pipe fitting. Using the abutment sockets 5 on both sides that are symmetrical, the position of the anti-corrosion pipe fitting inside the base pipe fitting is determined. The annular corrugated sleeve 12 on the sealing ring 6 is used to keep the side end of the base pipe section sealed, and the spiral sealing structure is used to seal the area of ​​the anti-corrosion pipe fitting away from the port of the base pipe fitting. Then, hydraulic water is supplied into the base pipe fitting through the water supply cylinder 4 and the abutment socket 5 to complete the purpose of hydraulically forming the anti-corrosion pipe fitting inside the base pipe fitting.

[0050] After the hydraulic forming operation is completed, the water supply sleeve 4 moves to the outside of the base pipe fitting, the annular corrugated sleeve 12 expands slightly, and the abutting ring surface 13 still abuts against the side end of the base pipe fitting, keeping the inside of the base pipe fitting sealed from the external environment. The water inlet hole 14 is connected to the internal area of ​​the base pipe fitting, and hydraulic water can enter the sealing ring sleeve 6 through the water inlet hole 14. Then, an external water pump or other liquid delivery equipment is used to connect with the liquid extraction pipe 15 to effectively extract the hydraulic water from the sealing ring sleeve 6. After the hydraulic water is discharged, the abutting socket 5 can be moved out of the base pipe fitting. The abutting socket 5 will also drive the sealing ring sleeve 6 to move towards the mounting box 9. Then, the hydraulically formed composite pipe fitting is moved out from between the upper mold 3 and the lower mold 2.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic forming machine for bimetallic composite pipe fittings, comprising a hydraulic forming machine body (1), wherein a lower mold (2) is fixedly installed and an upper mold (3) is slidably installed on the hydraulic forming machine body (1), characterized in that, Also includes: Water supply tube (4), both sides of the hydraulic forming machine body (1) are provided with the water supply tube (4), and a position adjustment mechanism is provided between the water supply tube (4) and the hydraulic forming machine body (1). The position adjustment mechanism is used to adjust the longitudinal and lateral positions of the water supply tube (4) and drive the water supply tube (4) to move into the base pipe fitting. Abutting socket (5) is connected to the side of the water supply socket (4) near the composite pipe fitting. The abutting socket (5) enters into the base pipe fitting and abuts against the anti-corrosion pipe fitting. The sealing ring sleeve (6) is slidably provided on the outside of the water supply cylinder (4). The sealing ring sleeve (6) abuts against the side end of the base pipe fitting. The sealing ring sleeve (6) also has the function of draining liquid after hydraulicing is completed. A spiral sealing structure is provided between the outer side of the abutting socket (5) and the water supply plug (4) for sealing the side end of the anti-corrosion pipe fitting and the base pipe fitting; The bidirectional liquid supply structure is connected between the water supply plug (4) and the spiral sealing structure, and supplies liquid to the water supply plug (4) and the spiral sealing structure respectively.

2. The bimetallic composite pipe fitting hydraulic forming machine according to claim 1, characterized in that, The middle part of the water supply tube (4) is provided as a metal corrugated pipe section (7), so that when the water supply tube (4) moves into the base pipe fitting, it adapts to the shape of the inner cavity of the base pipe fitting.

3. The bimetallic composite pipe fitting hydraulic forming machine according to claim 2, characterized in that, The position adjustment mechanism includes: A through slide (8) is fixedly connected to the body (1) of the hydraulic forming machine. A mounting box (9) is longitudinally slidably arranged inside the through slide (8). A screw lifting structure (10) that drives the mounting box (9) to move longitudinally is arranged inside the through slide (8). A transverse screw (11) is installed in the mounting box (9) for transverse transmission. One end of the transverse screw (11) is fixedly connected to the water supply tube (4) to push the water supply tube (4) into the base pipe.

4. The bimetallic composite pipe fitting hydraulic forming machine according to claim 3, characterized in that, The sealing ring sleeve (6) is provided with an annular corrugated sleeve (12) on the side near the abutting socket (5). The end of the annular corrugated sleeve (12) near the abutting socket (5) is provided as an abutting ring surface (13), and the abutting ring surface (13) abuts against the side end of the base pipe fitting. Among them, the sealing ring sleeve (6) has multiple water inlet holes (14) along a semi-circular path at the bottom of one end near the annular corrugated sleeve (12). When the annular corrugated sleeve (12) extends or retracts, it closes the water inlet holes (14). The top of the sealing ring (6) is connected to a liquid extraction tube (15), and both sides of the bottom of the liquid extraction tube (15) are connected to arc-shaped suction tubes (16).

5. The bimetallic composite pipe fitting hydraulic forming machine according to claim 4, characterized in that, The sealing ring sleeve (6) has multiple abutment grooves (17) fixedly connected to both sides of its circumference. The abutment socket (5) has multiple abutment blocks (18) fixedly connected to the side of its circumference near the sealing ring sleeve (6). The abutment blocks (18) abut against the abutment grooves (17).

6. The bimetallic composite pipe fitting hydraulic forming machine according to claim 5, characterized in that, The water supply sleeve (4) is fixedly fitted with an installation ring plate (19) on the side near the transverse screw (11). The bottom of the sealing ring sleeve (6) is fixedly connected with a damping slide rod (20) on the side near the installation ring plate (19). The damping slide rod (20) is slidably connected to the bottom of the installation ring plate (19). After the abutting ring surface (13) abuts against the base pipe fitting, when the installation ring plate (19) moves towards the base pipe fitting, it generates a pushing force on the sealing ring sleeve (6) towards the base pipe fitting.

7. A bimetallic composite material pipe fitting hydraulic forming machine according to claim 6, characterized in that, The mounting ring plate (19) is provided with a spacing adjustment component on one side near the sealing ring sleeve (6), and an abutting ring plate (21) is provided on the other side of the spacing adjustment component. The abutting ring plate (21) is provided with an abutting protrusion (22) on its circumference that cooperates with the abutting groove (17).

8. A bimetallic composite material pipe fitting hydraulic forming machine according to claim 7, characterized in that, The spiral sealing structure includes: The spiral infusion pipeline (23) is sleeved on the outside of the water supply sleeve (4). The outer arc surface of the spiral infusion pipeline (23) is provided with an expansion layer (24). After the liquid enters the spiral infusion pipeline (23), the expansion layer (24) expands and contacts the inner wall of the base pipe. A supporting spiral plate (25) is fixedly connected to the outer wall of the spiral infusion pipeline (23).

9. A bimetallic composite material pipe fitting hydraulic forming machine according to claim 8, characterized in that, The bidirectional liquid supply structure includes: An annular water cylinder (26) is fixedly sleeved on the water supply tube (4), and the spiral infusion pipeline (23) is connected to the annular water cylinder (26). The three-way pipe (27) includes two infusion ports (28), which are respectively connected to the annular water cylinder (26) and the water supply tube (4). Each of the two infusion ports (28) is equipped with a closing valve.

10. A bimetallic composite material pipe fitting hydraulic forming machine according to claim 9, characterized in that, The spacing adjustment component includes: Sliding insert (29), two sliding inserts (29) are symmetrically arranged on the side of the mounting ring plate (19) near the abutting ring plate (21). The top of the sliding insert (29) is set as a transparent layer (30), and the bottom of the transparent layer (30) is equidistantly provided with multiple distance calibration points (31). Engaging slots (32): Multiple engagement slots (32) are fixedly connected at equal intervals to the bottom of the sliding insert (29), and the engagement slots (32) correspond one-to-one with the distance calibration points (31); The sliding insert (33) is slidably connected to the sliding insert (29) through the sliding insert (33). A spring damper (34) is provided between the sliding insert (33) and the abutment ring plate (21). Two arc-shaped inserts (35) are provided at one end of the sliding insert (33), and the arc-shaped inserts (35) engage with the corresponding engagement slots (32).

Images