Hydraulic pipe internal expansion type pipe expander

Abstract

The utility model belongs to the technical field of hydraulic pipe machining, and discloses a hydraulic pipe internal expansion type pipe expanding machine which comprises a base, a driving structure, a rotating structure and a pipe expanding column, and is characterized in that a vertical plate and a positioning column are arranged on the base, a supporting structure is movably arranged on the top of the positioning column, a movable threaded ring is arranged on a double-threaded column in a sleeving mode, and the double-threaded column is provided with a rotating shaft. A fixing plate is arranged at the top of each movable screw ring, the rotating structure is arranged at the top end of the fixing plate of one movable screw ring, and the pipe expanding column is installed on the fixing plate opposite to the rotating structure through an installation ring. A plurality of rotating cylinders are arranged on the driving structure, a plurality of pipe expanding columns are mounted on the fixing plate, a plurality of hydraulic pipes can be expanded at the same time at a time, the pipe expanding efficiency of the hydraulic pipes is improved, the proper pipe expanding columns and rotating cylinders are selected according to the hydraulic pipes with different inner diameters and outer diameters, the universality of the pipe expanding machine can be improved, and the pipe expanding efficiency is improved. And the pipe expanding quality of the hydraulic pipe can also be improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pipe processing technology, specifically a hydraulic pipe internal expansion expander. Background Technology

[0002] Pipe expander fixtures are commonly used equipment for forming the ends of hydraulic pipes. When using pipe expander fixtures, it is necessary to pre-position the pipe to be processed using a fixture, and then open the cylinder so that the flaring plug is inserted into the end of the pipe to achieve the compression and expansion of the pipe end, thus expanding the hydraulic pipe.

[0003] However, existing hydraulic pipe expansion tools generally have limited functionality and can only be applied to a limited number of hydraulic pipe specifications, resulting in low versatility. On the other hand, hydraulic pipes are not very stable during the expansion process and are prone to shaking, which adversely affects the quality of expansion.

[0004] Based on this, the applicant proposes a hydraulic in-pipe expansion expander. Utility Model Content

[0005] The purpose of this invention is to address the problems of low versatility, low stability of hydraulic pipes during the expansion process, and poor expansion quality of existing hydraulic pipe expansion tools, and to provide a hydraulic pipe internal expansion machine with reasonable structural design, good versatility, good stability of hydraulic pipes during the expansion process, and high expansion quality.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0007] A hydraulic in-tube expansion machine includes a base, a drive structure, a rotating structure, and an expansion column. The base has a vertical plate and a positioning column. A bearing is mounted on the vertical plate, and a top plate with a pressing structure is located on the top of the vertical plate. A lifting structure is movably mounted on the top of the positioning column. The drive structure includes a motor, a movable helical ring, and a double-threaded column. The motor is mounted on the vertical plate. One end of the double-threaded column is connected to the motor, and the other end is inserted into the bearing. The movable helical ring is fitted onto the double-threaded column, and a fixing plate is located on top of the movable helical ring. The rotating structure is located on top of the fixing plate of the movable helical ring and has a rotating cylinder. The expansion column is mounted on the fixing plate opposite to the rotating structure via an mounting ring. The motor drives the double-threaded column to rotate, causing the distance between the two movable helical rings on the double-threaded column to increase or decrease. The movable helical rings, through the fixing plate, drive the rotating cylinder... The rotating structure and expanding column move to adjust the distance between the rotating cylinder and the expanding column, meeting the expansion needs of hydraulic pipes of different lengths and improving the versatility of the expanding machine. When expanding a hydraulic pipe, one end of the pipe is placed inside the rotating cylinder, and the expanding column is inserted into the other end, causing the expanding column to expand one end of the pipe, achieving internal expansion. The rotating cylinder drives the hydraulic pipe to rotate, and the pressing and lifting devices limit the movement of the hydraulic pipe during rotation, improving its stability during expansion. During expansion, two moving screw rings move towards each other, causing the rotating cylinder and expanding column to squeeze the hydraulic pipe, facilitating the smooth entry of the expanding column into the pipe for expansion, thus improving expansion efficiency and quality. After expansion, the two moving screw rings move away from each other, separating the rotating cylinder and expanding column from the hydraulic pipe, making it easy to remove the expanded pipe and further improving expansion efficiency.

[0008] Preferably, the outer wall of the double-threaded column is provided with two reverse-arranged threads, and the double-threaded column is provided with two reverse-arranged threads, which facilitates the adjustment of the distance between the two movable screw rings on the double-threaded column. This can be applied to hydraulic pipes of different lengths, improving the versatility of the pipe expander, and also facilitates the rapid expansion of hydraulic pipes, thereby improving the expansion efficiency of hydraulic pipes.

[0009] Preferably, the outer walls on both sides of the movable screw ring are provided with limiting plates, and limiting rings are provided on the limiting plates. A crossbar is provided between the vertical plates, and the crossbar passes through the limiting ring. The movable screw ring moves back and forth under the action of the motor, and the limiting ring on the limiting plate moves back and forth along the crossbar, which can limit the movable screw ring during the back and forth movement, thereby improving the stability of the drive structure and the expansion column during the adjustment process, and enhancing the stability of the hydraulic pipe during the expansion process.

[0010] Preferably, the drive structure includes a fixed frame, a second motor, and a rotating column. The fixed frame is located at the top of the fixed plate, with a second bearing on the inner wall and a fixing ring on the side wall. The second motor is located on the inner wall of the fixed frame, with a drive shaft on it. The drive shaft is inserted into the second bearing, and a first bevel gear is mounted on the drive shaft. The rotating column passes through the fixing ring. A second bevel gear, meshing with the first bevel gear, is mounted on one end of the rotating column inside the fixed frame, and a rotating cylinder is mounted on one end of the rotating column outside the fixed frame via a connecting ring. The second motor drives the drive shaft and the first bevel gear on the drive shaft to rotate. The first bevel gear drives the second bevel gear and the rotating column to rotate. The rotating column drives the rotating cylinder and the hydraulic pipe inserted into the rotating cylinder to rotate, causing the other end of the hydraulic pipe to rotate around the expanding column. This allows for rapid expansion of the hydraulic pipe. Setting one end of the expanding column to a tapered structure facilitates smooth insertion of the expanding column into the hydraulic pipe for expansion, thus enhancing the expansion quality of the hydraulic pipe.

[0011] Preferably, the expanding column and the rotating cylinder are configured in a one-to-one correspondence structure. The expanding column is made replaceable on the fixed plate via an mounting ring, and the rotating cylinder is made replaceable on the rotating column via a connecting ring. Multiple rotating cylinders are provided on the drive structure, and multiple expanding columns are installed on the fixed plate, which enables the simultaneous expansion of multiple hydraulic pipes, improving the expansion efficiency of hydraulic pipes. Selecting appropriate expanding columns and rotating cylinders according to different inner and outer diameters of hydraulic pipes can improve both the versatility of the expanding machine and the expansion quality of hydraulic pipes.

[0012] Preferably, the pressing structure includes a hydraulic cylinder and a pressing block. The hydraulic cylinder is mounted on the top plate and has a piston rod. The pressing block is connected to the piston rod and has a pressing groove. The pressing groove and the expanding column are configured to correspond one-to-one. During the expansion process of the hydraulic pipe, the hydraulic pipe rotates under the action of the rotating cylinder. The pressing groove on the pressing block can limit the hydraulic pipe from the top, and the lifting structure limits the hydraulic pipe from below, preventing the hydraulic pipe from shaking up and down during rotation, thereby improving the expansion efficiency and quality of the hydraulic pipe.

[0013] Preferably, the lifting structure includes a support block, a fixing cylinder at the bottom of the support block, and a groove at the top of the support block corresponding to the expanding column. The fixing cylinder is fitted onto the positioning column, and the fixing cylinder at the bottom of the support block is fitted onto the positioning column to improve the stability of the support block. Placing the hydraulic pipe during the rotation process in the groove can improve the stability of the hydraulic pipe during the expansion process and enhance the expansion quality of the hydraulic pipe. After the hydraulic pipe is expanded, the pressure block presses down on the hydraulic pipe to fix the expanded hydraulic pipe between the support block and the pressure block. The distance between the rotating cylinder and the expanding column is widened under the action of the motor, so that the rotating column and the expanding column are separated from the hydraulic pipe, which facilitates the collection of the expanded hydraulic pipe.

[0014] Preferably, a spring is provided between the top of the fixed cylinder and the positioning post. The spring provides a buffering effect on the support block on the positioning post, which facilitates the rotation of the hydraulic pipe in the groove of the support block and limits the hydraulic pipe during the expansion process, so that the expansion process of the hydraulic pipe can be carried out smoothly.

[0015] Beneficial effects:

[0016] 1. During the expansion process of the hydraulic pipe, the two moving screw rings move towards each other, causing the rotating cylinder and the expansion column to squeeze the hydraulic pipe. This facilitates the smooth entry of the expansion column into the hydraulic pipe for expansion, improving the expansion efficiency and quality of the hydraulic pipe. After the hydraulic pipe expansion is completed, the two moving screw rings move away from each other, and the rotating cylinder and the expansion column separate from the hydraulic pipe, making it easy to remove the expanded hydraulic pipe and improving the expansion efficiency of the hydraulic pipe.

[0017] 2. The drive structure is equipped with multiple rotating cylinders and multiple expansion columns are installed on the fixed plate, which can expand multiple hydraulic pipes at the same time, improving the expansion efficiency of hydraulic pipes. According to the hydraulic pipes with different inner and outer diameters, the appropriate expansion column and rotating cylinder can be selected, which can improve the versatility of the expansion machine and the expansion quality of hydraulic pipes.

[0018] 3. During the hydraulic pipe expansion process, the hydraulic pipe rotates under the action of the rotating cylinder. The pressure groove on the pressure block can limit the hydraulic pipe from the top, and the supporting structure limits the hydraulic pipe from below, preventing the hydraulic pipe from shaking up and down during rotation, thereby improving the expansion efficiency and quality of the hydraulic pipe. After the hydraulic pipe expansion is completed, the pressure block presses the hydraulic pipe downward, fixing the expanded hydraulic pipe between the support block and the pressure block. The rotating cylinder and the expansion column increase the distance under the action of the motor, so that the rotating column and the expansion column are separated from the hydraulic pipe, which facilitates the collection of the expanded hydraulic pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a partial structural diagram of the present invention, illustrating the connection structure between the movable screw ring and the limiting plate.

[0021] Figure 3 This is a partial structural diagram of the present invention, illustrating the connection structure between the drive shaft and the rotating column.

[0022] Figure 4 This is a partial structural diagram of the present invention, illustrating the connection structure between the fixing plate and the expansion column.

[0023] Figure 5This is a partial structural diagram of the present invention, illustrating the connection structure between the positioning column and the support block.

[0024] Figure 6 This is a partial structural diagram of the present invention, illustrating the connection structure between the piston rod and the pressure block.

[0025] Figure 7 This is a schematic diagram of another embodiment of the present invention.

[0026] Figure 8 This is the utility model Figure 7 Partial structural diagram illustrating the connection structure between the rotating cylinder and the fastening cylinder.

[0027] In the diagram: 1. Base, 2. Vertical plate, 3. Bearing 1, 4. Top plate, 5. Hydraulic cylinder, 6. Pressure block, 7. Positioning column, 8. Crossbar, 9. Motor 1, 10. Moving screw ring, 11. Double threaded column, 12. Fixing plate, 13. Limiting plate, 14. Limiting ring, 15. Fixing frame, 16. Motor 2, 17. Rotating column, 18. Rotating cylinder, 19. Bearing 2, 20. Expanding column, 21. Fixing ring, 22. Drive shaft, 23. Bevel gear 1, 24. Bevel gear 2, 25. Connecting ring, 26. Mounting ring, 27. Support block, 28. Fixing cylinder, 29. Support groove, 30. Spring, 31. Piston rod, 32. Pressure groove, 33. Fastening strip. Detailed Implementation

[0028] The present invention will now be described in more detail with reference to the accompanying drawings.

[0029] Example 1:

[0030] As attached Figure 1-6 As shown, a hydraulic in-pipe expansion machine includes a base 1, a drive structure, a rotating structure, and an expansion column 20. The base 1 has a vertical plate 2 and a positioning column 7. A bearing 3 is mounted on the vertical plate 2, and a top plate 4 is mounted on the top of the vertical plate 2. A pressing structure is mounted on the top of the top plate 4. A lifting structure is movably mounted on the top of the positioning column 7. The drive structure includes a motor 9, a movable screw ring 10, and a double-threaded column 11. The motor 9 is mounted on the vertical plate 2. One end of the double-threaded column 11 is connected to the motor 9, and the other end is inserted into the bearing 3. The movable screw ring 10 is sleeved on... On the double-threaded column 11, a fixed plate 12 is provided at the top of the movable screw ring 10. A rotating structure is provided at the top of the fixed plate 12 of the movable screw ring 10, and a rotating cylinder 18 is provided on the rotating structure. The expansion column 20 is installed on the fixed plate 12 opposite to the rotating structure through the mounting ring 26. The outer wall of the double-threaded column 11 is provided with two reverse threads. Limiting plates 13 are provided on the outer walls of both sides of the movable screw ring 10. Limiting rings 14 are provided on the limiting plates 13. A crossbar 8 is provided between the vertical plates 2 and the vertical plates 2, and the crossbar 8 passes through the limiting ring 14.

[0031] The drive structure includes a fixed frame 15, a second motor 16, and a rotating column 17. The fixed frame 15 is located at the top of the fixed plate 12. A second bearing 19 is provided on the inner wall of the fixed frame 15, and a fixing ring 21 is provided on the side wall of the fixed frame 15. The second motor 16 is located on the inner wall of the fixed frame 15, and a drive shaft 22 is provided on the second motor 16. The drive shaft 22 is inserted into the second bearing 19, and a first bevel gear 23 is provided on the drive shaft 22. The rotating column 17 passes through the fixing ring 21. A second bevel gear 24 is provided on one end of the rotating column 17 inside the fixed frame 15 and meshes with the first bevel gear 23. A rotating cylinder 18 is provided on one end of the rotating column 17 outside the fixed frame 15 through a connecting ring 25. The expanding tube column 20 and the rotating cylinder 18 are configured to correspond one-to-one. The expanding tube column 20 is configured to be replaceable on the fixed plate 12 through an mounting ring 26, and the rotating cylinder 18 is configured to be replaceable on the rotating column 17 through a connecting ring 25.

[0032] The pressing structure includes a hydraulic cylinder 5 and a pressing block 6. The hydraulic cylinder 5 is mounted on the top plate 4 and a piston rod 31 is mounted on the hydraulic cylinder 5. The pressing block 6 is connected to the piston rod 31 and a pressing groove 32 is mounted on the pressing block 6. The pressing groove 32 and the expanding column 20 are configured to correspond one-to-one.

[0033] The supporting structure includes a support block 27, a fixing cylinder 28 at the bottom of the support block 27, and a support groove 29 at the top of the support block 27 that corresponds one-to-one with the expansion column 20. The fixing cylinder 28 is sleeved on the positioning column 7, and a spring 30 is provided between the top of the fixing cylinder 28 and the positioning column 7.

[0034] Example 2:

[0035] Further improvements were made based on Example 1, as shown in the appendix. Figure 7-8 As shown, a hydraulic tube expansion machine has a rotating cylinder 18 with a fastening strip 33 installed inside via a spring 30. When expanding the hydraulic tube, one end of the hydraulic tube is inserted into the rotating cylinder 18, and the hydraulic tube squeezes the fastening strip 33, compressing the spring 30 between the fastening strip 33 and the inner wall of the rotating cylinder 18, so that the hydraulic tube remains stably within the space formed by the fastening strip 33. The rotating cylinder 18 drives the hydraulic tube to rotate, causing the other end of the hydraulic tube to rotate around the expansion column 20, thus expanding one end of the hydraulic tube.

[0036] Working principle: Based on the different inner and outer diameters of the hydraulic pipes, select the appropriate expansion column 20, rotating cylinder 18, and support block 27 with corresponding support groove 29. Install the mounting ring 26 on the expansion column 20 onto the fixed plate 12, install the connecting ring 25 on the rotating cylinder 18 onto the rotating column 17, and fit the fixed cylinder 28 on the support block 27 onto the positioning column 7. Start motor 9, adjust the position of the two moving screw rings 10 on the rotating stud, insert one end of the hydraulic pipe to be expanded into the rotating cylinder 18, and the other end is the expansion end. Insert the expansion column 20 into this end, and place the middle of the hydraulic pipe into the support groove 29. Start hydraulic cylinder 5. Hydraulic cylinder 5 and piston rod 31 push the pressure block 6 downward. The pressure groove 32 on the pressure block 6 contacts the top of the hydraulic pipe. Start motor 16. Motor 16 drives the transmission shaft and the bevel gear 23 on the transmission shaft to rotate. Bevel gear 23 drives the bevel gear Wheel 24 and rotating column 17 rotate, driving rotating cylinder 18 and hydraulic pipe inserted into rotating cylinder 18 to rotate, causing the other end of the hydraulic pipe to rotate around the expanding column, which can quickly expand the hydraulic pipe. Motor 9 is started and rotates in the opposite direction, reducing the distance between rotating cylinder 18 and expanding column 20, continuously pushing the hydraulic pipe towards expanding column 20. Expanding column 20 continuously expands the hydraulic pipe. After the hydraulic pipe is expanded, motor 26 is turned off, and the hydraulic pipe stops rotating. Pressing block 6 presses the hydraulic pipe downward under the action of hydraulic cylinder 5, fixing the expanded hydraulic pipe between support block 27 and pressing block 6. Rotating cylinder 18 and expanding column 20 increase the distance under the action of motor 9, causing rotating column 17 and expanding column 20 to separate from the hydraulic pipe, collecting the expanded hydraulic pipe. The unexpanded hydraulic pipe is then expanded again.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

Claims

1. A hydraulic in-tube expansion expander, comprising a base, a drive structure, a rotating structure, and an expanding column, characterized in that: The base is provided with a vertical plate and a positioning column. A bearing is provided on the vertical plate, and a top plate is provided on the top of the vertical plate. A pressing structure is provided on the top of the positioning column. A lifting structure is movably provided on the top of the positioning column. The driving structure includes a motor, a movable screw ring, and a double-threaded column. The motor is provided on the vertical plate. One end of the double-threaded column is connected to the motor, and the other end is inserted into the bearing. The movable screw ring is sleeved on the double-threaded column. A fixing plate is provided on the top of the movable screw ring. The rotating structure is provided on the top of the fixing plate of the movable screw ring, and a rotating cylinder is provided on the rotating structure. The expanding column is mounted on the fixing plate opposite to the rotating structure through an installation ring.

2. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The outer wall of the double-threaded column is provided with two sections of threads arranged in opposite directions.

3. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The movable screw ring has limit plates on both sides of its outer wall, and limit rings are provided on the limit plates. A crossbar is provided between the vertical plates and passes through the limit rings.

4. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The drive structure includes a fixed frame, a second motor, and a rotating column. The fixed frame is located at the top of a fixed plate. A second bearing is located on the inner wall of the fixed frame, and a fixing ring is located on the side wall of the fixed frame. The second motor is located on the inner wall of the fixed frame, and a drive shaft is located on the second motor. The drive shaft is inserted into the second bearing, and a first bevel gear is located on the drive shaft. The rotating column passes through the fixing ring. A second bevel gear, which meshes with the first bevel gear, is located at one end of the rotating column inside the fixed frame. A rotating cylinder is located at one end of the rotating column outside the fixed frame via a connecting ring.

5. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The expansion tube column and the rotating cylinder are configured in a one-to-one correspondence structure. The expansion tube column is configured to be replaceable on the fixed plate via an installation ring, and the rotating cylinder is configured to be replaceable on the rotating column via a connecting ring.

6. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The pressing structure includes a hydraulic cylinder and a pressing block. The hydraulic cylinder is mounted on the top plate and has a piston rod. The pressing block is connected to the piston rod and has a pressing groove. The pressing groove and the expanding column are configured to correspond one-to-one.

7. The hydraulic in-tube expansion expander according to claim 1, characterized in that: The lifting structure includes a support block, a fixing cylinder at the bottom of the support block, and a support groove at the top of the support block that corresponds one-to-one with the expansion column, and the fixing cylinder is sleeved on the positioning column.

8. The hydraulic in-tube expansion expander according to claim 7, characterized in that: A spring is provided between the top of the fixed cylinder and the positioning post.

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