Hydraulic bending machine with inner support

Abstract

The utility model provides an internally supported hydraulic bending machine, which relates to the field of bending machines, and comprises a support plate, a fixed extrusion ring arranged above the support plate, a telescopic extrusion ring connected above the support plate in a sliding manner, and an expandable inner support liquid bag arranged between the telescopic extrusion ring and the fixed extrusion ring, a connecting plate is arranged at the opening end of the inner supporting liquid bag, a one-way conducting valve is arranged at the liquid inlet end of the connecting plate, and according to the hydraulic bending machine with the inner supporting, the inner supporting liquid bag is placed in a bent pipeline, liquid is added into the inner supporting liquid bag through a liquid inlet pipe, so that the inner supporting liquid bag is expanded in size to be attached to the inner wall of the pipeline; at the moment, the liquid can extrude the sealing plug, overshoot liquid can be discharged through the through hole, after bending is completed, the threaded shaft is rotated to drive the valve element to move, the communicating hole is made to be aligned with the large notch, and therefore the liquid in the inner supporting liquid bag can be rapidly discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of elbow machines, in particular to an internally supported hydraulic elbow machine. Background Art

[0002] During the bending process, the inner wall of the pipe lacks support, which makes it easy for the inner wall of the pipe to be squeezed and deformed, thereby affecting the pipeline transportation efficiency.

[0003] The Chinese invention patent application disclosure specification CN220198535U discloses a pipe bending device for PE pipe processing, comprising a processing table, a first conical cylinder and a second conical cylinder. A connecting shaft is fixedly connected to one side of the top of the processing table, and the outer side of the connecting shaft is fixedly connected to a chassis and a guide wheel in sequence from bottom to top. A baffle is welded on the chassis, and circular grooves are provided on both upper and lower sides of the inner cavity of the guide wheel, and heating wires are installed in both circular grooves. The utility model inserts the first conical cylinder and the second conical cylinder at the two ends of the bent PE pipe, and then inflates the inflatable airbag through the inflatable handball to stably limit it in the PE pipe, and then inflates the PE pipe through the air pump, and then places the PE pipe on the inner side of the guide wheel and rotates it to heat the PE pipe bending part through the heating wire, and then the pressure relief valve automatically exhausts during bending to avoid damage to the PE pipe caused by excessive squeezing pressure.

[0004] This technical solution uses gas support to reduce deformation of PE pipes during bending, which affects their transport efficiency. However, two issues remain. First, the highly compressible gas bladder easily deforms. Second, the support material within the bladder is discharged only through a pressure relief valve after bending, which is slow and hinders the separation of the workpiece and bladder. Utility Model Content

[0005] In view of the deficiencies of the prior art, the present invention provides an internally supported hydraulic elbow machine, which solves the problem in the background art that the speed at which the support bladder discharges the support material is slow, which is not conducive to separation from the workpiece and the bladder.

[0006] Technical Solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: an internally supported hydraulic elbow machine, comprising a support plate, a fixed extrusion ring is provided above the support plate, a telescopic extrusion ring is slidably connected to the upper part of the support plate, an expandable internal support liquid bag is provided between the telescopic extrusion ring and the fixed extrusion ring, the open end of the internal support liquid bag is provided with a connecting plate, the liquid inlet end of the connecting plate is provided with a one-way guide valve, the liquid outlet end of the connecting plate is connected to and passes through a control valve, a liquid inlet pipe is provided at the rear end of the one-way guide valve, the liquid inlet pipe is unidirectionally connected to the one-way guide valve, and the rear end of the control valve is connected to and passes through a rotating ring Shell, one end of the rotating ring shell away from the control valve is connected to and penetrated with a drain pipe, the control valve includes a shell, the outer surface of the shell is provided with two notches of different sizes, the outer surfaces of the notches are connected and penetrated with the rotating ring shell through a connecting cover, the interior of the shell is slidably clamped with a valve core, the interior of the valve core is provided with a connecting port offset from the large notch, the interior of the valve core is provided with a drain port connected to the small notch, a through hole connected to the drain port is provided in the middle of the valve core, the middle part of the valve core is elastically slidably connected to a sealing plug covering the through hole, the rear end of the valve core is rotatably connected to a threaded shaft, the threaded shaft extends outside the shell and is threadedly connected to the shell.

[0008] Furthermore, the inner support liquid sac includes an axially arranged transverse reinforcement belt and an annular reinforcement belt sleeved on the outer surface of the inner support liquid sac.

[0009] Furthermore, a threaded sleeve connected to and passing through the one-way guide valve is fixedly installed on the rear end of the connecting plate, the liquid inlet pipe is unidirectionally rotatably connected to the threaded sleeve, an extrusion groove is provided on the rear end face of the connecting plate, the open end of the internal support liquid bag is sleeved on the outer surface of the connecting plate and covers the extrusion groove, the outer surface of the threaded sleeve is threadedly connected to the extrusion sleeve wrapped around the outer surface of the connecting plate, and the extrusion sleeve is provided with an extrusion ring block sleeved inside the extrusion groove.

[0010] Furthermore, the tail end of the threaded sleeve is threadedly connected to a collar, the collar and the threaded sleeve are limited by a positioning pin, the outer surface of the collar is provided with a one-way ratchet groove, and the liquid inlet pipe is rotatably connected to the inside of the one-way ratchet groove.

[0011] Furthermore, two circles of concentric grooves are provided inside the extrusion groove, and the edges of the extrusion groove are chamfered.

[0012] Furthermore, a rotating plate is rotatably mounted on the inner rear end of the valve core, and the threaded shaft is rotatably connected to the rotating plate.

[0013] The beneficial effects of the present invention are:

[0014] 1. The internally supported hydraulic elbow machine places an internal supporting liquid capsule in the pipe to be bent, and adds liquid to the internal supporting liquid capsule through the liquid inlet pipe so that the volume of the internal supporting liquid capsule expands and fits the inner wall of the pipe. At this time, the liquid can squeeze the sealing plug and discharge the over-flowing liquid through the through hole. When the elbow is completed, the liquid in the internal supporting liquid capsule needs to be released. At this time, the valve core is driven to move by rotating the threaded shaft so that the communicating hole is aligned with the large notch, thereby quickly discharging the liquid in the internal supporting liquid capsule.

[0015] 2. The internally supported hydraulic elbow machine is provided with a collar with a one-way ratchet groove and a liquid inlet pipe, so that the collar can be rotated unidirectionally relative to the liquid inlet pipe. Since the collar and the threaded sleeve are connected by a positioning pin, the connecting plate fixedly connected to the threaded sleeve can be driven to rotate when the collar is rotated unidirectionally, so that the internal support liquid capsule can be rotated at an angle after use to avoid uneven force on the unilateral internal support liquid capsule. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection of the internal support sac of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection plate connection of the utility model;

[0019] Figure 4 This is a half-section schematic diagram of the sleeve of the utility model;

[0020] Figure 5 This is a schematic diagram of the connection of the rotating ring shell of the utility model;

[0021] Figure 6 This is a half-section schematic diagram of the control valve of the utility model.

[0022] Among them, 1. support plate; 2. fixed extrusion ring; 3. telescopic extrusion ring; 4. inner supporting liquid capsule; 5. connecting plate; 6. one-way guide valve; 7. control valve; 8. liquid inlet pipe; 9. rotating ring shell; 10. liquid discharge pipe; 701. outer shell; 702. notch; 703. connecting port; 704. liquid discharge port; 705. through hole; 706. sealing plug; 707. threaded shaft; 708. connecting cover; 709. valve core; 401. transverse reinforcement belt; 402. annular reinforcement belt; 11. threaded sleeve; 12. extrusion groove; 14. extrusion sleeve; 15. extrusion ring block; 16. collar; 17. positioning pin; 18. one-way ratchet groove; 19. rotating plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See Figure 1-6 , a hydraulic elbow machine with internal support, including a support plate 1, a fixed extrusion ring 2 is provided above the support plate 1, a telescopic extrusion ring 3 is slidably connected to the upper part of the support plate 1, an expandable inner support liquid bag 4 is provided between the telescopic extrusion ring 3 and the fixed extrusion ring 2, and a connecting plate 5 is provided at the open end of the inner support liquid bag 4, a liquid inlet end of the connecting plate 5 is provided with a one-way guide valve 6, and the liquid outlet end of the connecting plate 5 is connected and penetrated with a control valve 7, a liquid inlet pipe 8 is provided at the rear end of the one-way guide valve 6, the liquid inlet pipe 8 is unidirectionally connected to the one-way guide valve 6, the rear end of the control valve 7 is connected and penetrated with a rotating ring shell 9, and the end of the rotating ring shell 9 away from the control valve 7 is connected and penetrated with a discharge pipe 10, the control valve 7 includes an outer shell 701, and the outer surface of the outer shell 701 is provided with two notches 702 of different sizes. The outer surface of 702 is connected to and penetrates the rotating ring shell 9 through a connecting cover 708. The connecting cover 708 is concentric with the liquid inlet pipe 8. The connecting cover 708 includes a fixed shell part and a ring plate part whose front end is connected to the fixed shell part and can rotate independently. The interior of the outer shell 701 is slidably clamped with a valve core 709. The interior of the valve core 709 is provided with a connecting port 703 which is staggered with the large notch 702. The interior of the valve core 709 is provided with a drain port 704 which is connected to the small notch 702. A through hole 705 which is connected to the drain port 704 is opened in the middle of the valve core 709. The middle part of the valve core 709 is elastically slidably connected to a sealing plug 706 covering the through hole 705. The rear end of the valve core 709 is rotatably connected to a threaded shaft 707. The threaded shaft 707 extends outside the outer shell 701 and is threadedly connected to the outer shell 701.

[0025] The inner support sac 4 includes an axially arranged transverse reinforcement belt 401 and an annular reinforcement belt 402 sleeved on the outer surface of the inner support sac 4. The inner support sac 4 and the two reinforcement belts are both made of rubber. The strength of the inner support sac 4 can be ensured by setting the reinforcement belt.

[0026] The rear end of the connecting plate 5 is fixedly installed with a threaded sleeve 11 connected to and passing through the one-way valve 6. The liquid inlet pipe 8 is unidirectionally connected to the threaded sleeve 11. An extrusion groove 12 is provided on the rear end face of the connecting plate 5. The open end of the inner support liquid capsule 4 is sleeved on the outer surface of the connecting plate 5 and covers the extrusion groove 12. The outer surface of the threaded sleeve 11 is threadedly connected with an extrusion sleeve 14 wrapped around the outer surface of the connecting plate 5. The extrusion sleeve 14 is provided with an extrusion ring block 15 sleeved inside the extrusion groove 12. The inner support liquid capsule 4 and the connecting plate 5 can be squeezed together by the extrusion sleeve 14 and the extrusion ring block 15 to avoid leakage.

[0027] The tail end of the threaded sleeve 11 is threadedly connected to a ring 16, and the ring 16 and the threaded sleeve 11 are limited by a positioning pin 17. The outer surface of the ring 16 is provided with a one-way ratchet groove 18, and the liquid inlet pipe 8 is rotatably connected to the inside of the one-way ratchet groove 18. Through such a setting, the threaded sleeve 11 can be rotated unidirectionally relative to the liquid inlet pipe 8.

[0028] Two concentric grooves are arranged inside the extrusion groove 12 , and the edges of the extrusion groove 12 are chamfered. This arrangement can ensure the strength of the seal and avoid scratching the inner support liquid capsule 4 .

[0029] The rear end of the valve core 709 is rotatably connected with the rotating plate 19, and the threaded shaft 707 is rotatably connected to the rotating plate 19. Through this arrangement, the valve core 709 can be driven to move forward and backward by the rotation of the threaded shaft 707.

[0030] When in use, the inner support liquid capsule 4 is placed in the pipe to be bent, and liquid is added to the inner support liquid capsule 4 through the liquid inlet pipe 8 so that the volume of the inner support liquid capsule 4 expands and fits the inner wall of the pipe. At this time, the liquid can squeeze the sealing plug 706 and discharge the over-flowing liquid through the through hole 705. When the elbow is completed, the liquid in the inner support liquid capsule 4 needs to be released. At this time, the valve core 709 is driven to move by rotating the threaded shaft 707 so that the communicating hole 705 is aligned with the large notch 702, so that the liquid in the inner support liquid capsule 4 can be quickly discharged.

[0031] By providing a collar 16 with a one-way ratchet groove 18 and a liquid inlet tube 8, the collar 16 can be rotated unidirectionally relative to the liquid inlet tube 8. Since the collar 16 and the threaded sleeve 11 are connected by a positioning pin 17, the connecting plate 5 fixedly connected to the threaded sleeve 11 can be driven to rotate when the collar 16 is rotated unidirectionally, so that the inner support liquid capsule 4 can be rotated at an angle after use to avoid uneven force on the inner support liquid capsule 4 on one side.

[0032] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An internally supported hydraulic elbow machine, comprising a support plate (1), a fixed extrusion ring (2) disposed above the support plate (1), a telescopic extrusion ring (3) slidably connected above the support plate (1), an expandable internal support liquid bag (4) disposed between the telescopic extrusion ring (3) and the fixed extrusion ring (2), characterized in that: The open end of the inner support liquid capsule (4) is provided with a connecting plate (5), the liquid inlet end of the connecting plate (5) is provided with a one-way guide valve (6), the liquid outlet end of the connecting plate (5) is connected to and penetrates a control valve (7), a rear end of the one-way guide valve (6) is provided with a liquid inlet pipe (8), the liquid inlet pipe (8) is unidirectionally connected to the one-way guide valve (6), the rear end of the control valve (7) is connected to and penetrates a rotating ring shell (9), and the end of the rotating ring shell (9) away from the control valve (7) is connected to and penetrates a liquid discharge pipe (10); The control valve (7) comprises a housing (701), wherein the outer surface of the housing (701) is provided with two notches (702) of different sizes, the outer surface of the notch (702) is connected to and communicates with the rotating ring housing (9) via a connecting cover (708), a valve core (709) is slidably engaged with the interior of the housing (701), a communication port (703) staggered with the large notch (702) is provided inside the valve core (709), a liquid discharge port (704) communicating with the small notch (702) is provided inside the valve core (709), a through hole (705) communicating with the liquid discharge port (704) is provided in the middle of the valve core (709), a sealing plug (706) covering the through hole (705) is elastically slidably connected to the middle of the valve core (709), and a threaded shaft (707) is rotatably connected to the rear end of the valve core (709), the threaded shaft (707) extending outside the housing (701) and being threadedly connected to the housing (701).

2. The internally supported hydraulic elbow machine according to claim 1, characterized in that: The inner support liquid sac (4) comprises an axially arranged transverse reinforcement belt (401) and an annular reinforcement belt (402) sleeved on the outer surface of the inner support liquid sac (4).

3. The internally supported hydraulic elbow machine according to claim 1, characterized in that: A threaded sleeve (11) connected to and passing through the one-way guide valve (6) is fixedly mounted on the rear end of the connecting plate (5); the liquid inlet pipe (8) is unidirectionally rotatably connected to the threaded sleeve (11); an extrusion groove (12) is provided on the rear end surface of the connecting plate (5); the open end of the internal support liquid capsule (4) is sleeved on the outer surface of the connecting plate (5) and covers the extrusion groove (12); the outer surface of the threaded sleeve (11) is threadedly connected to an extrusion sleeve (14) wrapped around the outer surface of the connecting plate (5); and the extrusion sleeve (14) is provided with an extrusion ring block (15) sleeved inside the extrusion groove (12).

4. The internally supported hydraulic elbow machine according to claim 3, characterized in that: The tail end of the threaded sleeve (11) is threadedly connected to a collar (16), and the collar (16) and the threaded sleeve (11) are limited by a positioning pin (17). The outer surface of the collar (16) is provided with a one-way ratchet groove (18), and the liquid inlet pipe (8) is rotatably connected to the inside of the one-way ratchet groove (18).

5. The internally supported hydraulic elbow machine according to claim 3, characterized in that: Two concentric grooves are arranged inside the extrusion groove (12), and the edges of the extrusion groove (12) are chamfered.

6. The internally supported hydraulic elbow machine according to claim 1, characterized in that: The inner rear end of the valve core (709) is rotatably connected to a rotating plate (19), and the threaded shaft (707) is rotatably connected to the rotating plate (19).

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