An auxiliary positioning device for seamless steel tube piercing and a positioning method thereof

Abstract

The application belongs to the technical field of seamless steel pipe processing, and discloses a kind of auxiliary positioning device and positioning method for the piercing of seamless steel pipe, including end locking assembly, the left and right sides of the rear end of end locking assembly are both equipped with bottom plate, the middle part of the end of two bottom plates relatively close is both equipped with extension frame, the top of bottom plate is equipped with clamping plate, the middle part of the end of two clamping plates relatively far away is both equipped with mounting bracket.The pressure of hydraulic oil is changed into rotary power, and the rotary power is changed into the movement of clamping ring, the inward displacement of multiple clamping rings is realized, and the fixation of steel pipe end is completed by the pressure applied by multiple clamping rings, which effectively avoids the clamping mode of only two sides of the traditional device, and the uniform pressure applied by the end can effectively prevent the rolling of steel pipe, and the whole operation is automatically completed, which effectively improves the fixation effect and positioning efficiency of steel pipe.

Description

Technical Field

[0001] This invention belongs to the field of seamless steel pipe processing technology, specifically an auxiliary positioning device and positioning method for piercing seamless steel pipes. Background Technology

[0002] Seamless steel pipe is a type of steel pipe product with a highly complex manufacturing process, high processing difficulty, and high quality requirements. It is produced by heating a steel billet to a certain temperature and then processing it through rolling or drawing processes. It possesses advantages such as high strength, corrosion resistance, high temperature resistance, and pressure resistance. Seamless steel pipes have high appearance and dimensional accuracy, making them suitable for various demanding industrial fields, such as petroleum, chemical, natural gas, aerospace, and machinery manufacturing. The manufacturing processes of seamless steel pipes include two main methods: hot rolling and cold drawing. Hot rolling involves heating a steel billet to a certain temperature and then processing it through rolling machinery to ultimately form a seamless steel pipe. Cold drawing involves heating a steel billet to a certain temperature and then processing it through drawing machinery to ultimately form a seamless steel pipe.

[0003] In the actual processing of seamless steel pipes, a piercing step is required. The current piercing method involves heating and softening the steel pipe, placing it on a workbench, aligning it with the corresponding piercing steel column, fixing the steel pipe to be pierced, and then using hydraulic pressure to achieve piercing. During piercing positioning, an auxiliary positioning device is usually needed to position the steel pipe. The existing fixing methods all use two clamping plates or similar devices to fix the steel pipe. While this method can fix and limit the steel pipe, only the left and right ends of the steel pipe are subjected to clamping force, resulting in uneven force distribution. This can cause the steel pipe to roll during actual piercing, affecting the piercing effect.

[0004] During the auxiliary positioning process of seamless steel pipes, the seamless steel pipes may not be completely vertical before actual processing. During processing, the steel pipes need to be straightened and shaped. As a result, the outer surface of the steel pipe is not completely vertical when it is pierced. This can cause gaps to appear between the clamping plate and the steel pipe during actual positioning and fixing, making it impossible to provide a good clamping force for the steel pipe and seriously affecting its positioning effect. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary positioning device and positioning method for piercing seamless steel pipes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary positioning device for piercing seamless steel pipes, comprising an end locking assembly, wherein base plates are installed on both the left and right sides of the rear end of the end locking assembly, extension frames are installed at the middle of the relatively close ends of the two base plates, clamping plates are provided at the top of the base plates, mounting frames are installed at the middle of the relatively far ends of the two clamping plates, guide blocks are installed at the bottom of the mounting frames, fixed guide rails are installed at the relatively close ends of the two extension frames, the guide blocks are movably engaged with the fixed guide rails, an adjustment assembly located between the two mounting frames is installed at the middle of the bottom end of the base plate, anti-slip grooves are provided at the relatively close ends of the two clamping plates, rubber airbags are installed at the relatively close ends of the two clamping plates, liquid guiding holes are provided at the ends of the two rubber airbags near the end locking assembly, and the other ends of the liquid guiding holes are connected to the end locking assembly.

[0007] Before use, the device must be fixed to the steel pipe processing device, the front of the end locking component must be aligned with the punch, the bottom of the adjusting component must be connected to the external hydraulic oil delivery device, and one end of the steel pipe must be passed through the end locking component and positioned between the two clamps, i.e., above the base plate, to complete the positioning preparation.

[0008] As a further technical solution of the present invention, the end locking component includes a first fixed box, the top of the first fixed box is fixedly connected to a second fixed box, and an adjusting guide rail is fixedly installed at equal angles on the inner side of the first fixed box, and a locking block is movably engaged on the inner side of the adjusting guide rail.

[0009] As a further technical solution of the present invention, each of the card blocks is equipped with a clamping ring at one end near the middle of the first fixed box, and the inner side of each clamping ring is provided with an anti-slip groove. Each of the card blocks is equipped with an extension shaft at one end away from the middle of the first fixed box, and the other end of the extension shaft passes through the inner side of the first fixed box and is movably connected to the first fixed box.

[0010] As a further technical solution of the present invention, a second fixed seat located inside the first fixed box is installed at the end of the extension shaft away from the locking block. The end of the second fixed seat away from the extension shaft is movably connected to a linkage rod through a rotating shaft. The first fixed box is provided with an active gear ring inside. The first fixed seat is fixedly installed at an equal angle on the inner side of the active gear ring. The end of the first fixed seat away from the active gear ring is movably connected to a linkage rod through a rotating shaft. The other end of the linkage rod is movably connected to the second fixed seat.

[0011] As a further technical solution of the present invention, the top end of the active gear ring is meshed with a driven gear located inside the second fixed box, and a main shaft is fixedly connected to the middle of the inner side of the driven gear. The main shaft passes through the front and rear ends of the second fixed box and is movably connected to the second fixed box. The rear end of the main shaft passes through the rear end of the second fixed box and is fixedly connected to a first connecting rod.

[0012] As a further technical solution of the present invention, the end of the first connecting rod away from the main shaft is movably connected to the second connecting rod via a rotating shaft, and the end of the second connecting rod away from the first connecting rod is movably connected to the mounting base via a rotating shaft. The bottom end of the mounting base is fixedly connected to the first piston rod. The end locking assembly also includes a first liquid storage tube. The first liquid storage tube is connected to the rear end of the second fixed box via a connecting seat. The bottom end of the first piston rod passes through the top end of the first liquid storage tube and is fixedly connected to a first piston plate located inside the first liquid storage tube. The first piston plate and the first liquid storage tube are movably sleeved together.

[0013] As a further technical solution of the present invention, the bottom end of the first liquid storage tube is fixedly connected to a No. 3 three-way valve, and both the left and right sides of the bottom end of the No. 1 three-way valve are fixedly connected to connecting pipes, and the other end of the connecting pipes is connected to the rubber airbag.

[0014] When it is necessary to pierce the end of the steel pipe, the hydraulic oil inside the rubber airbag is injected into the interior of the connecting pipe through the guide hole, and then enters the interior of the first reservoir pipe through the No. 1 three-way valve, applying an upward force to the first piston plate. At this time, the first piston plate and the first piston rod rise and drive the mounting seat to move upward. At this time, the active gear ring swings and drives the first connecting rod to rotate. When the first connecting rod rotates, it can simultaneously drive the main shaft and the driven gear to rotate. When the driven gear rotates clockwise, it can simultaneously drive the active gear ring meshed at the bottom to rotate counterclockwise. At this time, the linkage rod located on the inner side of the active gear ring swings counterclockwise under the drive of the first fixed seat. At this time, the angle between the first fixed seat and the inner side of the active gear ring increases, and at the same time, it applies an inward thrust to the extension shaft and drives the locking block to move relative to the adjusting guide rail. At this time, the clamping ring moves towards the center of the first fixed box under the push of the clamping block. At this time, multiple clamping rings move closer together until they contact the outer side of the steel pipe, completing the limiting and fixing of the end face of the steel pipe, making it evenly stressed and preventing rolling.

[0015] By utilizing hydraulic oil pressure, the pressure is converted into rotational power, which in turn is used to move the clamping rings. This causes multiple clamping rings to move inward, and the pressure applied by these rings secures the end of the steel pipe. This effectively avoids the traditional method of clamping only from both sides. The uniform clamping force applied to the end effectively prevents the steel pipe from rolling. The entire operation is completed automatically, significantly improving the fixing effect and positioning efficiency of the steel pipe.

[0016] As a further technical solution of the present invention, the adjusting component includes a second liquid storage tube, which is connected to the middle of the bottom end of the base plate via an extension seat. Second piston plates are movably sleeved on both the left and right sides of the inner cavity of the second liquid storage tube. A second piston rod is installed at the relatively far end of each of the two second piston plates. The two relatively far-away second piston rods pass through both ends of the second liquid storage tube and are connected to the mounting bracket. A No. 2 three-way valve is provided at the middle of the bottom end of the second liquid storage tube. An inlet valve is fixedly connected to the bottom end of the No. 2 three-way valve. Inlet pipes are fixedly connected to both the left and right ends of the No. 2 three-way valve. The other end of the inlet pipe is connected to the position near the left and right sides of the bottom end of the second liquid storage tube.

[0017] As a further technical solution of the present invention, the second liquid storage tube is fixedly connected to the left and right sides near the top of the tube with infusion tubes, the other end of the infusion tube is connected to the rubber air bladder, and the bottom end of the inlet valve is connected to the external oil pipe.

[0018] When the steel pipe is placed between the two clamping plates, external hydraulic oil is introduced into the No. 2 three-way valve by opening the inlet valve, and then introduced into the second reservoir pipe through the inlet pipe. At this time, the two second piston plates are subjected to pressure and driven to move closer to each other. Then, under the action of the second piston rod, the two guide blocks slide relative to the fixed guide rail. At this time, the two clamping plates move closer to each other under the action of the mounting bracket to complete the clamping process of the steel pipe.

[0019] By further utilizing the pressure of hydraulic oil, the two clamps can be brought close together quickly by inputting hydraulic oil. The two clamps can quickly limit and fix steel pipes of different diameters. At the same time, disassembly can be quickly achieved by simply releasing hydraulic oil. The whole process is completed quickly, which can effectively improve the fixing efficiency of steel pipes, shorten the positioning time, and improve production efficiency.

[0020] When the initial fixing of the steel pipe is completed, the hydraulic oil input into the second reservoir pipe can be transported to the inside of the rubber air bladder through the infusion pipe at the top of the second reservoir pipe. As the hydraulic oil is input, the rubber air bladder is forced to expand, and the volume of the rubber air bladder increases accordingly. Due to the flow of hydraulic oil and the flexible rubber air bladder, the outer surface of the rubber air bladder can make close contact with the steel pipe and fill the corresponding gaps, thus completing the secondary fixing process.

[0021] By reusing the hydraulic oil pressure and utilizing its flow and fluid action to act on the flexible rubber bladder, the inflated rubber bladder can adapt to the slightly deformed steel pipe and fit tightly against its outer surface. This fills the gap between the slightly deformed steel pipe and the clamping plate, effectively avoiding the problem of gaps between the clamping device and the steel pipe caused by insufficient verticality of the steel pipe in traditional devices, and improving the overall clamping effect.

[0022] A positioning method for an auxiliary positioning device used for piercing seamless steel pipes includes the following steps:

[0023] S1: Before use, the inlet valve can be connected to the external oil pipe, and hydraulic oil can be input into the interior of the No. 2 three-way valve through the inlet valve. At this time, the steel pipe can be passed through the middle of the first fixed box and placed between the two clamps, that is, above the bottom plate, to complete the preparation before the limit positioning.

[0024] S2: When the limit is fixed, hydraulic oil can be injected into the interior of the No. 2 three-way valve by opening the external oil pipe, and can enter the interior of the second reservoir pipe through the inlet pipe, and apply inward pressure to the two second piston plates. At this time, the two second piston plates will move closer to each other and drive the two second piston rods to move closer to each other. At this time, the two guide blocks can drive the two clamping plates to move closer to each other under the guidance of the fixed guide rail to quickly clamp the steel pipe.

[0025] S3: Simultaneously, with the input of hydraulic oil, the hydraulic oil can be injected into the interior of the rubber airbag through the two infusion pipes at the top of the second reservoir pipe, causing the rubber airbag to inflate. When the rubber airbag inflates, it can be used to fill the gap between the steel pipe and the clamp plate to complete the auxiliary positioning. At the same time, the hydraulic oil can enter the interior of the end locking assembly through the guide hole.

[0026] S4: Hydraulic oil then enters the interior of the first reservoir pipe through the connecting pipe. At this time, the first piston plate and the first piston rod are pressed and displaced upward, the mounting base swings, and drives the first connecting rod to rotate. At this time, the main shaft and the driven gear rotate. The driven gear rotates clockwise and drives the meshing drive gear ring to rotate counterclockwise. When the drive gear ring rotates counterclockwise, it can drive the extension shaft to swing.

[0027] S5: At this time, the angle between the extension shaft and the inner side of the active gear ring increases, and an inward thrust is applied to the extension shaft. At this time, the clamping block adjusts the guide rail displacement accordingly, and drives the clamping ring to move towards the inner side of the first fixed box until multiple clamping rings move towards the middle of the first fixed box to clamp the internal steel pipe, thus completing the limiting and fixing of the steel pipe end.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. This invention utilizes hydraulic oil pressure, converting it into rotational power, which in turn generates the motion of clamping rings. This causes multiple clamping rings to displace inward, and the pressure applied by these rings secures the end of the steel pipe. This effectively avoids the traditional method of clamping only from both sides. The uniform clamping force applied to the end effectively prevents the steel pipe from rolling. Furthermore, the entire operation is completed automatically, significantly improving the fixing effect and positioning efficiency of the steel pipe.

[0030] 2. This invention reuses hydraulic oil pressure and utilizes the flow and fluid action of hydraulic oil to act on a flexible rubber airbag. This allows the inflated rubber airbag to adapt to the slightly deformed steel pipe and fit tightly against its outer surface. This fills the gap between the slightly deformed steel pipe and the clamping plate, effectively avoiding the problem of gaps between the clamping device and the steel pipe caused by insufficient verticality of the steel pipe in traditional devices, thus improving the overall clamping effect.

[0031] 3. This invention further utilizes the pressure of hydraulic oil. By inputting hydraulic oil, the two clamps can be brought close together quickly. The two clamps can quickly limit and fix steel pipes of different diameters. At the same time, disassembly can be quickly achieved by simply releasing hydraulic oil. The whole process is completed quickly, which can effectively improve the fixing efficiency of steel pipes, shorten the positioning time, and improve production efficiency. Attached Figure Description

[0032] Figure 1 This is a front view of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the rear end of the overall structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the bottom of the overall structure of the present invention;

[0035] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the fixed guide rail of the present invention;

[0036] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the adjustment component of the present invention;

[0037] Figure 6 This is a cross-sectional schematic diagram of the internal structure of the rubber airbag of the present invention;

[0038] Figure 7 This is a schematic diagram of the rear end structure of the end locking component of the present invention;

[0039] Figure 8 This is a cross-sectional schematic diagram of the internal structure of the end locking component of the present invention;

[0040] Figure 9 This is a schematic diagram of the internal structure of the active gear ring of the present invention.

[0041] In the figure: 1. End locking assembly; 101. First fixed box; 102. Second fixed box; 103. Adjusting guide rail; 104. Driving gear ring; 105. First fixed seat; 106. Second fixed seat; 107. Linkage rod; 108. Extension shaft; 109. Locking block; 1010. Clamping ring; 1011. Driven gear; 1012. Main shaft; 1013. First connecting rod; 1014. Second connecting rod; 1015. Mounting seat; 1016. First liquid storage tube; 017. First piston plate; 1018. First piston rod; 1019. No. 1 three-way valve; 1020. Connecting pipe; 2. Base plate; 3. Extension frame; 4. Fixed guide rail; 5. Mounting frame; 6. Guide block; 7. Clamping plate; 8. Adjustment assembly; 801. Second liquid storage pipe; 802. Second piston plate; 803. Second piston rod; 804. No. 2 three-way valve; 805. Inlet valve; 806. Inlet pipe; 9. Rubber air bladder; 10. Infusion pipe; 11. Liquid guide hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figures 1 to 9 As shown in the embodiment of the present invention, an auxiliary positioning device for piercing seamless steel pipes includes an end locking assembly 1. A base plate 2 is installed on both the left and right sides of the rear end of the end locking assembly 1. An extension frame 3 is installed at the middle of the relatively close ends of the two base plates 2. A clamping plate 7 is provided at the top of each base plate 2. A mounting frame 5 is installed at the middle of the relatively far ends of the two clamping plates 7. A guide block 6 is installed at the bottom of each mounting frame 5. A fixed guide rail 4 is installed at the relatively close ends of the two extension frames 3. The guide block 6 and the fixed guide rail 4 are movably engaged. An adjustment assembly 8 is installed at the middle of the bottom end of the base plate 2, located between the two mounting frames 5. Anti-slip grooves are provided at the relatively close ends of the two clamping plates 7. Rubber airbags 9 are installed at the relatively close ends of the two clamping plates 7. Liquid guiding holes 11 are provided at the ends of the two rubber airbags 9 near the end locking assembly 1. The other end of the liquid guiding holes 11 is connected to the end locking assembly 1.

[0044] Before use, the device must be fixed to the steel pipe processing device, the front of the end locking component 1 must be aligned with the punch, the bottom of the adjusting component 8 must be connected to the external hydraulic oil delivery device, and one end of the steel pipe must be passed through the end locking component 1 and positioned between the two clamping plates 7, i.e. above the base plate 2, to complete the preparation for positioning.

[0045] like Figure 1 and Figure 7 as well as Figure 8 and Figure 9As shown, the end locking assembly 1 includes a first fixed box 101, with a second fixed box 102 fixedly connected to the top of the first fixed box 101. Adjustable guide rails 103 are fixedly mounted at equal angles on the inner side of the first fixed box 101. Each inner side of the adjustable guide rail 103 is movably engaged with a locking block 109. A clamping ring 1010 is installed at one end of each locking block 109 near the middle of the first fixed box 101. Anti-slip grooves are provided on the inner side of each clamping ring 1010. An extension shaft 108 is installed at the end of each locking block 109 away from the middle of the first fixed box 101. The other end of the extension shaft 108 passes through the inner side of the first fixed box 101 and is movably engaged with the first fixed box 101. The extension shaft 108, at the end furthest from the locking block 109, is fitted with a second fixing seat 106 located inside the first fixing box 101. The end of the second fixing seat 106 furthest from the extension shaft 108 is movably connected to a linkage rod 107 via a rotating shaft. The first fixing box 101 contains a drive gear ring 104. A first fixing seat 105 is fixedly mounted at an equal angle on the inner surface of the drive gear ring 104. The end of the first fixing seat 105 furthest from the drive gear ring 104 is movably connected to the linkage rod 107 via a rotating shaft. The other end of the linkage rod 107 is movably connected to the second fixing seat 106. The top end of the drive gear ring 104 is engaged with a second fixing seat 106 located inside the first fixing box 101. Inside the housing 102, there is a driven gear 1011. A main shaft 1012 is fixedly connected to the middle of the inner side of the driven gear 1011. The main shaft 1012 passes through both ends of the second fixed housing 102 and is movably connected to the second fixed housing 102. The rear end of the main shaft 1012 passes through the rear end of the second fixed housing 102 and is fixedly connected to a first connecting rod 1013. The end of the first connecting rod 1013 away from the main shaft 1012 is movably connected to a second connecting rod 1014 via a rotating shaft. The end of the second connecting rod 1014 away from the first connecting rod 1013 is movably connected to a mounting base 1015 via a rotating shaft. The bottom end of the mounting base 1015 is fixedly connected to a first piston rod 10. 18. The end locking assembly 1 also includes a first liquid storage tube 1016. The first liquid storage tube 1016 is connected to the rear end of the second fixed box 102 through a connecting seat. The bottom end of the first piston rod 1018 passes through the top end of the first liquid storage tube 1016 and is fixedly connected to a first piston plate 1017 located inside the first liquid storage tube 1016. The first piston plate 1017 is movably sleeved with the first liquid storage tube 1016. The bottom end of the first liquid storage tube 1016 is fixedly connected to a first three-way valve 1019. The left and right sides of the bottom end of the first three-way valve 1019 are fixedly connected to connecting pipes 1020. The other end of the connecting pipe 1020 is connected to the rubber airbag 9.

[0046] Example 1:

[0047] When it is necessary to pierce the end of the steel pipe, the hydraulic oil inside the rubber airbag 9 is injected into the connecting pipe 1020 through the guide hole 11, and enters the first reservoir pipe 1016 through the No. 1 three-way valve 1019, applying an upward force to the first piston plate 1017. At this time, the first piston plate 1017 and the first piston rod 1018 rise and drive the mounting base 1015 to move upward. At this time, the driving gear ring 104 swings and drives the first connecting rod 1013 to rotate. When the first connecting rod 1013 rotates, it can synchronously drive the main shaft 1012 and the driven gear 1011 to rotate. When the driven gear 1011 rotates clockwise, it can synchronously drive the main shaft 1012 and the driven gear 1011 to rotate. The active gear ring 104, which is engaged at the bottom end, rotates counterclockwise. At this time, the linkage rod 107 located on the inner side of the active gear ring 104 swings counterclockwise under the drive of the first fixed seat 105. At this time, the angle between the first fixed seat 105 and the inner side of the active gear ring 104 increases, and at the same time, an inward thrust is applied to the extension shaft 108, which drives the locking block 109 to move relative to the adjusting guide rail 103. At this time, the clamping ring 1010 moves towards the middle of the first fixed box 101 under the push of the locking block 109. At this time, multiple clamping rings 1010 move closer to each other until they contact the outer side of the steel pipe, thus completing the limiting and fixing of the end face of the steel pipe, making the force even and preventing rolling.

[0048] By utilizing the pressure of hydraulic oil, the pressure is converted into rotational power, which in turn is used to move the clamping rings 1010. This causes multiple clamping rings 1010 to move inward, and the pressure applied by the multiple clamping rings 1010 is used to fix the end of the steel pipe. This effectively avoids the traditional method of clamping only from both sides. The uniform clamping force applied to the end effectively prevents the steel pipe from rolling. At the same time, the entire operation is completed automatically, which effectively improves the fixing effect and positioning efficiency of the steel pipe.

[0049] like Figure 3 and Figure 4 as well as Figure 5As shown, the adjusting assembly 8 includes a second liquid storage tube 801, which is connected to the middle of the bottom end of the base plate 2 via an extension seat. Second piston plates 802 are movably sleeved on both the left and right sides of the inner cavity of the second liquid storage tube 801. Second piston rods 803 are installed at the relatively far ends of the two second piston plates 802. The two relatively far-away second piston rods 803 pass through both ends of the second liquid storage tube 801 and are connected to the mounting bracket 5. A [missing information - likely a design feature] is provided at the middle of the bottom end of the second liquid storage tube 801. The bottom end of the second three-way valve 804 is fixedly connected to the inlet valve 805. Both the left and right ends of the second three-way valve 804 are fixedly connected to the inlet pipe 806. The other end of the inlet pipe 806 is connected to the bottom end of the second liquid storage pipe 801 near the left and right sides. Both the left and right sides of the second liquid storage pipe 801 near the top are fixedly connected to the delivery pipe 10. The other end of the delivery pipe 10 is connected to the rubber air bladder 9. The bottom end of the inlet valve 805 is connected to the external oil pipe.

[0050] When the steel pipe is placed between the two clamping plates 7, external hydraulic oil is introduced into the No. 2 three-way valve 804 by opening the inlet valve 805, and then conveyed into the second reservoir pipe 801 through the inlet pipe 806. At this time, the two second piston plates 802 are subjected to pressure and driven to move closer to each other. Then, under the action of the second piston rod 803, the two guide blocks 6 slide relative to the fixed guide rail 4. At this time, the two clamping plates 7 move closer to each other under the action of the mounting bracket 5 to complete the clamping process of the steel pipe.

[0051] By further utilizing the pressure of hydraulic oil, the two clamping plates 7 can be brought close together quickly by inputting hydraulic oil. The two clamping plates 7 can quickly limit and fix steel pipes of different diameters. At the same time, disassembly can be quickly achieved by simply releasing hydraulic oil. The whole process is completed quickly, which can effectively improve the fixing efficiency of steel pipes, shorten the positioning time, and improve production efficiency.

[0052] Example 2:

[0053] When the initial fixing of the steel pipe is completed, the hydraulic oil input into the second reservoir pipe 801 can be transported to the inside of the rubber airbag 9 through the infusion pipe 10 at the top of the second reservoir pipe 801. With the input of hydraulic oil, the rubber airbag 9 can be forced to expand, and the volume of the rubber airbag 9 increases accordingly. Due to the flow of hydraulic oil and the flexible rubber airbag 9, the outer surface of the rubber airbag 9 can make close contact with the steel pipe and fill the corresponding gaps, thus completing the secondary fixing process.

[0054] By reusing the hydraulic oil pressure and utilizing the flow and fluid action of the hydraulic oil to act on the flexible rubber airbag 9, the inflated rubber airbag 9 can adapt to the slightly deformed steel pipe and fit tightly against its outer surface. This fills the gap between the slightly deformed steel pipe and the clamping plate 7, effectively avoiding the problem of gaps between the clamping device and the steel pipe caused by insufficient verticality of the steel pipe in traditional devices, and improving the overall clamping effect.

[0055] A positioning method for an auxiliary positioning device used for piercing seamless steel pipes includes the following steps:

[0056] S1: Before use, the inlet valve 805 can be connected to the external oil pipe, and hydraulic oil can be input into the interior of the No. 2 three-way valve 804 through the inlet valve 805. At this time, the steel pipe can be passed through the middle of the first fixed box 101 and placed between the two clamping plates 7, that is, above the bottom plate 2 to complete the preparation before the limit positioning.

[0057] S2: When the limit is fixed, hydraulic oil can be injected into the interior of the No. 2 three-way valve 804 by opening the external oil pipe, and can enter the interior of the second reservoir pipe 801 through the inlet pipe 806, and apply inward pressure to the two second piston plates 802. At this time, the two second piston plates 802 will move closer to each other, and drive the two second piston rods 803 to move closer to each other. At this time, the two guide blocks 6 can drive the two clamping plates 7 to move closer to each other under the guidance of the fixed guide rail 4 to quickly clamp the steel pipe.

[0058] S3: Simultaneously, with the input of hydraulic oil, the hydraulic oil can be injected into the interior of the rubber airbag 9 through the two infusion pipes 10 at the top of the second reservoir pipe 801, causing the rubber airbag 9 to inflate. When the rubber airbag 9 inflates, it can be used to fill the gap between the steel pipe and the clamp 7 to complete the auxiliary positioning. At the same time, the hydraulic oil can enter the interior of the end locking component 1 through the guide hole 11.

[0059] S4: Hydraulic oil then enters the interior of the first reservoir 1016 through the connecting pipe 1020. At this time, the first piston plate 1017 and the first piston rod 1018 are displaced upward under pressure, the mounting base 1015 swings, and drives the first connecting rod 1013 to rotate. At this time, the main shaft 1012 and the driven gear 1011 rotate. The driven gear 1011 rotates clockwise and drives the meshing drive gear ring 104 to rotate counterclockwise. When the drive gear ring 104 rotates counterclockwise, it can drive the extension shaft 108 to swing.

[0060] S5: At this time, the angle between the extension shaft 108 and the inner side of the active gear ring 104 increases, and an inward thrust is applied to the extension shaft 108. At this time, the clamping block 109 moves relative to the adjusting guide rail 103, and drives the clamping ring 1010 to move towards the inner side of the first fixed box 101 until all the clamping rings 1010 move towards the middle of the first fixed box 101 to clamp the steel pipe inside, thus completing the limiting and fixing of the end of the steel pipe.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary positioning device for piercing seamless steel pipes, comprising an end locking assembly (1), characterized in that: The end locking assembly (1) has a base plate (2) installed on both the left and right sides of its rear end. An extension frame (3) is installed in the middle of the two base plates (2) at their relatively close ends. The top of the base plate (2) is provided with a clamp (7). The middle of the two clamps (7) at their relatively far ends is provided with a mounting frame (5). The bottom of the mounting frame (5) is provided with a guide block (6). The two extension frames (3) are provided with a fixed guide rail (4) at their relatively close ends. The guide block (6) and the fixed guide rail (4) are movably engaged. An adjustment assembly (8) is installed in the middle of the bottom end of the base plate (2) between the two mounting frames (5). The two clamps (7) are provided with an anti-slip groove at their relatively close ends. The two clamps (7) are provided with a rubber airbag (9) at their relatively close ends. The two rubber airbags (9) are provided with a liquid guiding hole (11) at the end of the end locking assembly (1). The other end of the liquid guiding hole (11) is connected to the end locking assembly (1). The end locking assembly (1) includes a first fixed box (101), the top of the first fixed box (101) is fixedly connected to a second fixed box (102), and an adjusting guide rail (103) is fixedly installed at equal angles on the inner side of the first fixed box (101). The inner side of the adjusting guide rail (103) is movably engaged with a locking block (109). Each of the card blocks (109) is equipped with a clamping ring (1010) at one end near the middle of the first fixed box (101). The inner side of each clamping ring (1010) is provided with an anti-slip groove. Each of the card blocks (109) is equipped with an extension shaft (108) at one end away from the middle of the first fixed box (101). The other end of the extension shaft (108) passes through the inner side of the first fixed box (101) and is movably connected to the first fixed box (101). The end of the extension shaft (108) away from the locking block (109) is equipped with a second fixing seat (106) located inside the first fixing box (101). The end of the second fixing seat (106) away from the extension shaft (108) is movably connected to a linkage rod (107) through a rotating shaft. The first fixing box (101) is provided with an active gear ring (104). The inner side of the active gear ring (104) is fixedly mounted with a first fixing seat (105) at equal angles. The end of the first fixing seat (105) away from the active gear ring (104) is movably connected to a linkage rod (107) through a rotating shaft. The other end of the linkage rod (107) is movably connected to the second fixing seat (106). The top of the active gear ring (104) is meshed with a driven gear (1011) located inside the second fixed box (102). A main shaft (1012) is fixedly connected to the middle of the inner side of the driven gear (1011). The main shaft (1012) passes through the front and rear ends of the second fixed box (102) and is movably connected to the second fixed box (102). The rear end of the main shaft (1012) passes through the rear end of the second fixed box (102) and is fixedly connected to a first connecting rod (1013). The end of the first connecting rod (1013) away from the main shaft (1012) is movably connected to the second connecting rod (1014) via a rotating shaft. The end of the second connecting rod (1014) away from the first connecting rod (1013) is movably connected to the mounting base (1015) via a rotating shaft. The bottom end of the mounting base (1015) is fixedly connected to the first piston rod (1018). The end locking assembly (1) also includes a first liquid storage tube (1016). The first liquid storage tube (1016) is connected to the rear end of the second fixed box (102) via a connecting seat. The bottom end of the first piston rod (1018) passes through the top end of the first liquid storage tube (1016) and is fixedly connected to a first piston plate (1017) located inside the first liquid storage tube (1016). The first piston plate (1017) and the first liquid storage tube (1016) are movably sleeved together. The bottom end of the first liquid storage tube (1016) is fixedly connected to a No. 1 three-way valve (1019), and the left and right sides of the bottom end of the No. 1 three-way valve (1019) are fixedly connected to a connecting pipe (1020), and the other end of the connecting pipe (1020) is connected to the rubber air bag (9).

2. The auxiliary positioning device for piercing seamless steel pipes according to claim 1, characterized in that: The adjustment assembly (8) includes a second liquid storage tube (801), which is connected to the middle of the bottom end of the base plate (2) via an extension seat. The left and right sides of the inner cavity of the second liquid storage tube (801) are movably fitted with second piston plates (802). The two ends of the two second piston plates (802) that are relatively far apart are each equipped with a second piston rod (803). The two second piston rods (803) that are relatively far apart pass through the left and right ends of the second liquid storage tube (801) and are connected to the mounting bracket (5). The middle of the bottom end of the second liquid storage tube (801) is provided with a No. 2 three-way valve (804). The bottom end of the No. 2 three-way valve (804) is fixedly connected to an inlet valve (805). The left and right ends of the No. 2 three-way valve (804) are fixedly connected to inlet pipes (806). The other end of the inlet pipe (806) is connected to the bottom end of the second liquid storage tube (801) near the left and right sides.

3. The auxiliary positioning device for piercing seamless steel pipes according to claim 2, characterized in that: The second liquid storage tube (801) has a liquid infusion tube (10) fixedly connected to both the left and right sides near the top. The other end of the liquid infusion tube (10) is connected to the rubber air bag (9). The bottom end of the liquid inlet valve (805) is connected to the external oil pipe.

4. A positioning method for an auxiliary positioning device for piercing seamless steel pipes, as described in claim 3, characterized in that: Includes the following steps: S1: Before use, the inlet valve (805) can be connected to the external oil pipe, and hydraulic oil can be input into the interior of the No. 2 three-way valve (804) through the inlet valve (805). At this time, the steel pipe can be passed through the middle of the first fixed box (101) and placed between the two clamps (7) above the bottom plate (2) to complete the preparation before the limit positioning. S2: When the limit is fixed, hydraulic oil can be injected into the interior of the No. 2 three-way valve (804) by opening the external oil pipe, and can enter the interior of the second reservoir pipe (801) through the inlet pipe (806), and apply inward pressure to the two second piston plates (802). At this time, the two second piston plates (802) will move closer to each other, and drive the two second piston rods (803) to move closer to each other. At this time, the two guide blocks (6) can drive the two clamping plates (7) to move closer to each other under the guidance of the fixed guide rail (4) to quickly clamp the steel pipe. S3: Simultaneously, with the input of hydraulic oil, the hydraulic oil can be injected into the interior of the rubber airbag (9) through the two infusion pipes (10) at the top of the second reservoir pipe (801), causing the rubber airbag (9) to expand. When the rubber airbag (9) expands, it can be used to fill the gap between the steel pipe and the clamp (7) to complete the auxiliary positioning. At the same time, the hydraulic oil can enter the interior of the end locking assembly (1) through the guide hole (11). S4: Hydraulic oil then enters the interior of the first reservoir pipe (1016) through the connecting pipe (1020). At this time, the first piston plate (1017) and the first piston rod (1018) are displaced upward under pressure, and the mounting base (1015) swings and drives the first connecting rod (1013) to rotate. At this time, the main shaft (1012) and the driven gear (1011) rotate. The driven gear (1011) rotates clockwise and drives the meshing active gear ring (104) to rotate counterclockwise. When the active gear ring (104) rotates counterclockwise, it can drive the extension shaft (108) to swing. S5: The angle between the extension shaft (108) and the inner side of the active gear ring (104) increases accordingly, and an inward thrust is applied to the extension shaft (108). At this time, the clamping block (109) moves relative to the adjusting guide rail (103) and drives the clamping ring (1010) to move towards the inner side of the first fixed box (101) until multiple clamping rings (1010) move towards the middle of the first fixed box (101) to clamp the steel pipe inside, thus completing the limiting and fixing of the end of the steel pipe.

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