A positioning and anti-slip fixture for steel pipe drop hammer test

Abstract

The present invention relates to the technical field of steel pipe drop hammer test, and the present invention discloses a positioning and anti-slipping fixture for steel pipe drop hammer test, comprising a base, an extrusion block slidably connected in the support cylinder, a second oil cylinder fixed to the top and the bottom of the support cylinder, a fourth piston slidably connected in the two second oil cylinders, a third oil cylinder fixed to one side of the oil pressure mechanism and one side of the support platform, a fifth piston slidably connected in the two third oil cylinders. The positioning and anti-slipping fixture for steel pipe drop hammer test has a certain amount of hydraulic oil initially in the clamping bag, two movable plates approach each other, the two clamping bags initially clamp the steel pipe, then unlock the extrusion block and continue to pull the handle, the third gear and the extrusion block to the right as a whole, rotate the third gear to drive the second gear to rotate, thereby pressing oil into the two clamping bags, making the clamping bags more saturated, so that the clamping bags can wrap the steel pipe more tightly, and conveniently achieve the anti-slipping effect.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe drop hammer test, in particular to a positioning and anti-slip fixture for steel pipe drop hammer test. Background Art

[0002] Double-sided submerged arc welded steel pipe is a steel pipe that is made by curling the strip into a tube and forming a spiral weld through double-sided automatic submerged arc welding technology. Double-sided submerged arc welded spiral steel pipe is widely used in long-distance oil and natural gas pipeline projects due to its excellent pressure-bearing capacity and good corrosion resistance. In the production process of spiral steel pipe, the spiral steel pipe is made by gradually rolling the strip through multiple rollers to form a circular tube with an open gap, and then formed by internal and external submerged arc welding. Therefore, it is necessary to perform a drop hammer test on the spiral steel pipe. By performing a drop hammer test on the material, the risk of brittle fracture at low temperature or other specific conditions can be identified, thereby guiding the improvement and optimization of the material. Before the drop hammer test on the steel pipe, the steel pipe needs to be clamped and fixed with a clamp.

[0003] It is now found that a typical fixture in the prior art is such as publication number CN119501453A, an internal clamp type steel pipe welding fixture, which belongs to the field of steel pipe welding technology. It includes components such as a base plate, a cassette wheel, etc. The threads at both ends of the double-threaded rod have opposite rotation directions. The double-threaded rod and the smooth rod are installed side by side on the base plate. The first motor output shaft is connected to a first bevel gear. The second bevel gear that cooperates with the first bevel gear is fixedly installed in the middle of the double-threaded rod. The two clamping mechanisms are relatively installed on the threaded sleeve. The two movable plates are symmetrically and slidably installed in the slide grooves at both ends of the base plate. The upper end of the movable plate is fixed with a placement table. In the present invention, the clamping mechanism uses multiple contact parts to simultaneously perform multi-point positioning in the steel pipe, and can also adjust the height of the clamping mechanism. The steel pipe is directly stabilized in the air by the clamping mechanism, which can adjust the two steel pipes to be welded to a concentric and non-deviation state without blocking the steel pipe, making it easy to perform welding, grinding, polishing and other tasks, thereby improving the accuracy of its docking and post-processing.

[0004] The existing clamps have a relatively regular shape and are made of a relatively hard material. During the clamping process, it is difficult for the clamp to fit tightly with the steel pipe and the adaptability is not high. There is a risk of the steel pipe slipping off the clamp, thereby affecting the accuracy of the steel pipe test position. Excessive clamping can easily damage the steel pipe. To address the above problems, the existing equipment needs to be improved. Summary of the Invention

[0005] The purpose of the present invention is to provide a positioning and anti-slip clamp for a drop hammer test on a steel pipe, so as to solve the problem proposed in the above background technology that the existing clamp has a relatively regular shape and is made of a relatively hard material. During the clamping process, the clamp is difficult to fit tightly with the steel pipe and the adaptability is not high. There is a risk of the steel pipe slipping on the clamp, thereby affecting the accuracy of the steel pipe test position, and excessive clamping can easily damage the steel pipe.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning and anti-slip fixture for a drop hammer test of a steel pipe, comprising a base, a support platform fixed to the upper end face of the base, a movable plate symmetrically and slidingly connected on both sides of the support platform, the outer side of the movable plate is connected to the top support rod through a second spring, the top support rod passes through the movable plate, a clamping bag is fixed to the inner end face of the movable plate, the clamping bag is wrapped around the outer side of the top support rod, an oil pressure mechanism is fixed to the bottom of the support platform, the oil pressure mechanism passes through the movable plate and is connected to the clamping bag.

[0007] A locking mechanism is fixed on one side of the support platform, and the locking mechanism includes a support cylinder, an extrusion block is slidably connected in the support cylinder, a second oil cylinder is fixed on the top and the bottom of the support cylinder, and a fourth piston is slidably connected in both of the second oil cylinders, and a third oil cylinder is fixed on one side of the oil pressure mechanism and one side of the support platform, and a fifth piston is slidably connected in both of the third oil cylinders.

[0008] Working principle: There is a certain amount of hydraulic oil in the clamping bag at the beginning, and the second spring and the support rod are used to support the clamping bag. First, rotate the flap to open and place the steel pipe on the pallet, then manually press the steel pipe to adjust the height of the steel pipe and make it between the two clamping bags, then rotate and close the flap, press the pressing block, the second piston moves to the left, and the two third pistons move and leave the second slot to unlock the extrusion block, and then pull the handle, the third gear and the extrusion to the right as a whole and make the third gear mesh with the first gear. After releasing the pressing block, the third piston is stuck in the corresponding second slot, thereby re-locking the extrusion block, hold the handle to rotate the third gear, thereby driving the first gear and the first screw to rotate, and the two movable plates slide and approach each other, which is convenient for initial clamping of the steel pipe. After pressing the pressing block to unlock the extrusion block, continue to pull the handle, the third gear and the extrusion to the right as a whole. Gear and extrusion block, the extrusion block squeezes the first movable plate and the corresponding fourth piston to move upward, and the corresponding fifth piston moves to the right and is stuck in the corresponding first slot, thereby locking the first gear. After the third gear is meshed with the second gear and connected together, the pressing block is released to lock the extrusion block. The third gear is rotated by hand, thereby driving the second gear and the second screw rod to rotate, and the sleeve and the first piston move to the left. Hydraulic oil is stored in the first oil cylinder, and oil is pressed into the two clamping bags so that the clamping bags can tightly wrap the steel pipe, making the clamping and fixing effect better. When the extrusion block is unlocked and squeezed to pull the handle, the third gear and the extrusion block as a whole to the right, the extrusion block squeezes the second movable plate and the corresponding fourth piston to move downward, and the corresponding fifth piston moves to the right and is stuck in the corresponding first slot, thereby locking the second gear. The steel pipe can then be subjected to a drop hammer test.

[0009] Preferably, a first groove is provided in the middle of the upper end surface of the support platform, and a first spring is fixed in the first groove. A supporting plate is fixed on the top of the first spring, and the supporting plate is slidably connected in the first groove.

[0010] Preferably, the support platform is rotatably connected to a first screw rod, the two movable plates are symmetrically threadedly connected to the outside of the first screw rod, one end of the first screw rod is fixed with a first gear, and the other end of the first screw rod is connected to the support platform through a torsion spring.

[0011] Preferably, limiting blocks are symmetrically fixed on both sides of the top of one of the movable plates, and a flip cover is rotatably connected to the top of the other movable plate, and limiting grooves are symmetrically provided on both sides of the flip cover.

[0012] Preferably, the oil pressure mechanism includes a support block, and the support block is fixed to the bottom of the support platform, a second screw rod is rotatably connected to the support block, and a second gear is fixed to one end of the second screw rod, and a first slot is provided on one side of the second gear and one side of the first gear, and the first slots are evenly distributed circumferentially on the second gear and the first gear.

[0013] Preferably, the other end of the second screw rod is threadedly connected to a sleeve, and a first piston is fixed to one end of the sleeve, and a first oil cylinder is fixed to the bottom of the support platform, the first piston is slidably connected in the first oil cylinder, and the first piston is connected to an inner wall of the first oil cylinder through a third spring, and two first connecting pipes are fixed to one side of the first oil cylinder, and the two first connecting pipes respectively pass through the two movable plates, and the ends of the two first connecting pipes are respectively connected to the two clamping bags.

[0014] The cam is secured to the first gear and is adapted to engage the second gear of the drive gear, and the cam is secured to the first gear and is adapted to engage the second gear of the drive gear.

[0015] Preferably, a third groove is provided at the inner top of the support cylinder, and a fifth spring is fixed in the third groove, a first movable plate is fixed at the bottom of the fifth spring, and the first movable plate is slidably connected in the third groove, a fourth groove is provided at the inner bottom of the support cylinder, and a sixth spring is fixed in the fourth groove, a second movable plate is fixed at the top of the sixth spring, and the second movable plate is slidably connected in the fourth groove, and a fourth piston is fixed at the top of the first movable plate and the bottom of the second movable plate.

[0016] Preferably, a third oil cylinder is fixed on one side of the support block and one side of the support platform, the second oil cylinder at the top of the support tube is connected to the third oil cylinder on the support platform through a third connecting pipe, and the second oil cylinder at the bottom of the support tube is connected to the third oil cylinder on the support block through a third connecting pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The positioning and anti-slip fixture for steel pipe drop hammer test can achieve the purpose of firm clamping and anti-slipping through the mutual use of the first gear, second spring, top support rod, clamping bag, second gear, extrusion block, third gear, turning handle and pressing block. There is a certain amount of hydraulic oil in the clamping bag initially. The clamping bag can be opened by using the second spring and the top support rod. After placing the steel pipe, press the pressing block to unlock the extrusion block, and then pull the turning handle, third gear and extrusion block to the right as a whole to engage the third gear with the first gear before releasing the pressing block. Lock the extrusion block, rotate the third gear to drive the first gear to rotate, the two movable plates approach each other, the two clamping bags initially clamp the steel pipe, then unlock the extrusion block and continue to pull the handle, the third gear and the extrusion block to the right as a whole, engage the third gear with the second gear and then release the pressing block to lock the extrusion block, rotate the third gear to drive the second gear to rotate, thereby pressing oil into the two clamping bags, making the clamping bags more saturated, so that the clamping bags can clamp and wrap the steel pipe more tightly, which is convenient for achieving the anti-slip effect and can play a certain protective role.

[0019] 2. The positioning and anti-slip fixture for the steel pipe drop hammer test can achieve the purpose of adjusting the placement height through the mutual use of the support plate, clamping bag and flip cover. After opening the flip cover and placing the steel pipe on the support plate, the height of the steel pipe can be adjusted by manually pressing down on the steel pipe so that the steel pipe can be located between the centers of the two clamping bags, thereby achieving a better subsequent clamping effect.

[0020] 3. The positioning and anti-slip fixture for the steel pipe drop hammer test can achieve the purpose of locking through the mutual cooperation of the first gear, the second gear, the first slot, the extrusion block, the third gear, the turning handle, the first movable plate, the second movable plate, the fourth piston and the fifth piston. After the third gear is meshed and connected with the first gear or the second gear, it is necessary to continue to pull the turning handle, the third gear and the extrusion block to the right as a whole. The extrusion block squeezes the first movable plate or the second movable plate, thereby driving the corresponding fourth piston to move, and the corresponding fifth piston moves and is stuck in the corresponding first slot, so as to facilitate locking the first gear or the second gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a right-side perspective structural diagram of the present invention;

[0022] Figure 2 It is a left-side perspective structural diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the locking mechanism of the present invention;

[0025] Figure 5This is a schematic diagram of the connection structure of the support cylinder, the extrusion block, the rotating shaft, the oil pressure pipeline, the second connecting pipeline, the second oil tank, the third piston and the second clamping groove of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure of the first screw rod, the movable plate, the top support rod and the first connecting pipe of the present invention;

[0027] Figure 7 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0028] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point B in the middle.

[0029] In the figure: 1, base; 2, support platform; 3, first groove; 4, first spring; 5, support plate; 6, first screw rod; 7, movable plate; 8, first gear; 9, torsion spring; 10, second spring; 11, top support rod; 12, clamping bag; 13, limit block; 14, flip cover; 15, limit groove; 16, oil pressure mechanism; 1601, support block; 1602, second screw rod; 1603, second gear; 1604, first slot; 1605, sleeve; 1606, first oil cylinder; 1607, third spring; 1608, first piston; 1609, first connecting pipe; 17, locking mechanism; 1701, support cylinder; 1702, extrusion block; 1703, rotating shaft; 1 704, third gear; 1705, turning handle; 1706, second groove; 1707, fourth spring; 1708, pressing block; 1709, second piston; 1710, first oil groove; 1711, oil pressure pipeline; 1712, second connecting pipeline; 1713, second oil groove; 1714, third piston; 1715, second clamping groove; 1716, third groove; 1717, fifth spring; 1718, first movable plate; 1719, fourth groove; 1720, sixth spring; 1721, second movable plate; 1722, fourth piston; 1723, second oil cylinder; 1724, third connecting pipeline; 1725, third oil cylinder; 1726, fifth piston. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figures 1 to 8The present invention provides a technical solution: a positioning and anti-slip fixture for a drop hammer test of a steel pipe, comprising a base 1, a support platform 2 being fixed on the upper end surface of the base 1, a movable plate 7 being symmetrically slidably connected on both sides of the support platform 2, the outer side of the movable plate 7 being connected to a top support rod 11 through a second spring 10, the top support rod 11 passing through the movable plate 7, a clamping bag 12 being fixed on the inner end surface of the movable plate 7, the clamping bag 12 being wrapped around the outer side of the top support rod 11, an oil pressure mechanism 16 being fixed to the bottom of the support platform 2, the oil pressure mechanism 16 passing through the movable plate 7 and communicating with the clamping bag 12.

[0032] A locking mechanism 17 is fixed on one side of the support platform 2, and the locking mechanism 17 includes a support cylinder 1701, and an extrusion block 1702 is slidably connected inside the support cylinder 1701. A second oil cylinder 1723 is fixed to the top and the bottom of the support cylinder 1701, and a fourth piston 1722 is slidably connected inside the two second oil cylinders 1723. A third oil cylinder 1725 is fixed on one side of the oil pressure mechanism 16 and one side of the support platform 2, and a fifth piston 1726 is slidably connected inside the two third oil cylinders 1725.

[0033] In this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, a first groove 3 is provided in the middle of the upper end surface of the support platform 2, and a first spring 4 is fixed in the first groove 3. A support plate 5 is fixed on the top of the first spring 4, and the support plate 5 is slidably connected in the first groove 3. The first spring 4 supports the support plate 5. After placing the steel pipe on the support plate 5, the height of the steel pipe can be adjusted by manually pressing down on the steel pipe so that the steel pipe can be located between the centers of the two clamping bags 12, which is convenient for better positioning and clamping.

[0034] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, a first screw rod 6 is rotatably connected to the support platform 2, and two movable plates 7 are symmetrically threadedly connected to the outside of the first screw rod 6. A first gear 8 is fixed to one end of the first screw rod 6, and the other end of the first screw rod 6 is connected to the support platform 2 through a torsion spring 9. When the first gear 8 rotates, it can drive the first screw rod 6 to rotate. At this time, the two movable plates 7 can slide under the limiting action of the support platform 2 and the first screw rod 6. The two movable plates 7 are close to each other, and the steel pipe can be clamped by using a clamping bag 12 containing hydraulic oil. The torsion spring 9 can assist the first screw rod 6 to rotate and reset.

[0035] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 7As shown, limiting blocks 13 are symmetrically fixed on both sides of the top of one of the movable plates 7, and a flip cover 14 is rotatably connected to the top of the other movable plate 7. Limiting grooves 15 are symmetrically provided on both sides of the flip cover 14. Before placing the steel pipe, the flip cover 14 needs to be rotated open. After the steel pipe is placed, the flip cover 14 can be rotated closed. When the two movable plates 7 approach each other, the limiting blocks 13 slide into the limiting grooves 15, which facilitates locking the flip cover 14.

[0036] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, the oil pressure mechanism 16 includes a support block 1601, and the support block 1601 is fixed to the bottom of the support platform 2. A second screw rod 1602 is rotatably connected to the support block 1601, and a second gear 1603 is fixed to one end of the second screw rod 1602. A first slot 1604 is provided on one side of the second gear 1603 and one side of the first gear 8, and the first slots 1604 are evenly distributed circumferentially on the second gear 1603 and the first gear 8. The rotation of the second gear 1603 can drive the second screw rod 1602 to rotate. When the fifth piston 1726 in the third oil cylinder 1725 on the support block 1601 is stuck in the first slot 1604 on the second gear 1603, the second gear 1603 can be locked. When the fifth piston 1726 in the third oil cylinder 1725 on the support platform 2 is stuck in the first slot 1604 in the first gear 8, the first gear 8 can be locked.

[0037] In this embodiment, Figure 3 and Figure 6 As shown, the other end of the second screw rod 1602 is threadedly connected to the sleeve 1605, and one end of the sleeve 1605 is fixed with a first piston 1608. A first oil cylinder 1606 is fixed to the bottom of the support platform 2. The first piston 1608 is slidably connected in the first oil cylinder 1606, and the first piston 1608 is connected to an inner wall of the first oil cylinder 1606 through a third spring 1607. Two first connecting pipes 1609 are fixed on one side of the first oil cylinder 1606, and the two first connecting pipes 1609 respectively pass through the two movable plates 7. The ends of the two first connecting pipes 1609 are respectively connected to the two clamping bags 12. The first connecting pipes 1609 serve to connect the first oil cylinder 1606 and the clamping bag 12. When the second screw rod 1602 rotates, the sleeve 1605 can move to the left under the limiting action of the second screw rod 1602 and the first oil cylinder 1606, thereby driving the first piston 1608 to move to the left, which is convenient for automatically pressing oil into the clamping bag 12.

[0038] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 8 As shown, one side of the extrusion block 1702 is rotatably connected to the rotating shaft 1703, and the rotating shaft 1703 passes through one side of the support cylinder 1701 and is connected to the third gear 1704. A turning handle 1705 is fixed to one side of the third gear 1704, and a second groove 1706 is provided on one side of the turning handle 1705. A fourth spring 1707 is fixed in the second groove 1706, and a pressing block 1708 is fixed at one end of the fourth spring 1707. The pressing block 1708 is slidably connected in the second groove 1706, and a second piston 1709 is fixed on one side of the pressing block 1708. A first oil groove is provided in the turning handle 1705. 1710, the second piston 1709 is slidably connected to the first oil groove 1710, a pressure oil pipeline 1711 is fixed in the rotating shaft 1703, and the head end of the pressure oil pipeline 1711 is connected to the first oil groove 1710, and second oil grooves 1713 are symmetrically opened on both sides of the extrusion block 1702. The end of the pressure oil pipeline 1711 is connected to the two second oil grooves 1713 through a second connecting pipeline 1712, and a third piston 1714 is slidably connected to the second oil groove 1713. Second card grooves 1715 are symmetrically opened on the two inner walls of the support cylinder 1701, and the second card grooves 1715 are evenly spaced and distributed on the support cylinder 1701. 1, the third piston 1714 is engaged and connected in the second groove 1715, and the oil pressure pipe 1711 and the second connecting pipe 1712 serve to connect the first oil groove 1710 and the two second oil grooves 1713. When the pressing block 1708 is pressed, the second piston 1709 moves to the left, and the two third pistons 1714 move and leave the second groove 1715 under the action of oil pressure, which facilitates unlocking the squeezing block 1702. After releasing the pressing block 1708, the pressing block 1708 automatically pops open under the action of the fourth spring 1707, the second piston 1709 moves to the right, and the third piston 1714 is stuck in the corresponding second groove. 1715, it is convenient to re-lock the squeezing block 1702, unlock the squeezing block 1702, and then pull the turning handle 1705, the third gear 1704 and the squeezing block 1702 to the right as a whole so that the third gear 1704 is engaged with the first gear 8 and connected together. Then, holding the turning handle 1705 and rotating the third gear 1704 can drive the first gear 8 to rotate. After pulling the turning handle 1705, the third gear 1704 and the squeezing block 1702 to the right as a whole so that the third gear 1704 is engaged with the second gear 1603 and connected together, holding the turning handle 1705 and rotating the third gear 1704 can drive the second gear 1603 to rotate.

[0039] In this embodiment, Figure 3 and Figure 4As shown, a third groove 1716 is provided on the inner top of the support cylinder 1701, and a fifth spring 1717 is fixed in the third groove 1716, a first movable plate 1718 is fixed to the bottom of the fifth spring 1717, and the first movable plate 1718 is slidably connected in the third groove 1716, a fourth groove 1719 is provided on the inner bottom of the support cylinder 1701, and a sixth spring 1720 is fixed in the fourth groove 1719, a second movable plate 1721 is fixed on the top of the sixth spring 1720, and the second movable plate 1721 is slidably connected in the fourth groove 1719, a fourth piston 1722 is fixed to the top of the first movable plate 1718 and the bottom of the second movable plate 1721, and the fifth spring 1717 is fixed to the first movable plate 1718 plays a supporting role, and the sixth spring 1720 plays a supporting role on the second movable plate 1721. When the extrusion block 1702 moves to the right and squeezes the first movable plate 1718, the first movable plate 1718 moves upward, and the corresponding fourth piston 1722 moves upward. The corresponding fifth piston 1726 moves to the right and is stuck in one of the first slots 1604 on the first gear 8, which is convenient for locking the first gear 8. When the extrusion block 1702 moves to the right and squeezes the second movable plate 1721, the second movable plate 1721 moves downward, the corresponding fourth piston 1722 moves downward, and the corresponding fifth piston 1726 moves to the right and is stuck in one of the first slots 1604 on the second gear 1603, which is convenient for locking the second gear 1603.

[0040] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8 As shown, a third oil cylinder 1725 is fixed on one side of the support block 1601 and one side of the support platform 2, the second oil cylinder 1723 at the top of the support tube 1701 is connected to the third oil cylinder 1725 on the support platform 2 through a third connecting pipe 1724, and the second oil cylinder 1723 at the bottom of the support tube 1701 is connected to the third oil cylinder 1725 on the support block 1601 through a third connecting pipe 1724, one of the third connecting pipes 1724 serves to connect the second oil cylinder 1723 at the top of the support tube 1701 and the third oil cylinder 1725 on the support platform 2, and the other third connecting pipe 1724 serves to connect the second oil cylinder 1723 at the bottom of the support tube 1701 and the third oil cylinder 1725 on the support block 1601.

[0041] The use method and advantages of the present invention: The positioning anti-drop fixture for steel pipe drop hammer test has the following working process:

[0042] like Figures 1 to 8As shown: there is a certain amount of hydraulic oil in the clamping bag 12 at the beginning, and the second spring 10 and the supporting rod 11 are used to support the clamping bag 12. First, rotate the flip cover 14 to open and place the steel pipe on the support plate 5. Then manually press the steel pipe to adjust the height of the steel pipe and make it between the two clamping bags 12. Then rotate and close the flip cover 14, press the pressing block 1708, the second piston 1709 moves to the left, and the two third pistons 1714 move and leave the second slot 1715, thereby unlocking the squeezing block 1702, and then pull the turning handle 1705, the third gear 1704 and the squeezing block 1702 to the right as a whole. After the pressing block 1708 is released, the third piston 1714 is inserted into the corresponding second slot 1715, thereby relocking the squeezing block 1702. The turning handle 1705 is held by hand to rotate the third gear 1704, thereby driving the first gear 8 and the first screw rod 6 to rotate. The two movable plates 7 slide and approach each other, which is convenient for initially clamping the steel pipe. After pressing the pressing block 1708 to unlock the squeezing block 1702, continue to pull the turning handle 1705, the third gear 1704 and the squeezing block 1702 to the right as a whole. 2. The squeezing block 1702 squeezes the first movable plate 1718 and the corresponding fourth piston 1722 to move upward, and the corresponding fifth piston 1726 moves right and is stuck in the corresponding first slot 1604, thereby locking the first gear 8. The third gear 1704 is meshed with the second gear 1603 and connected together. Then, the pressing block 1708 is released to lock the squeezing block 1702. The turning handle 1705 is held and the third gear 1704 is rotated, thereby driving the second gear 1603 and the second screw rod 1602 to rotate. The sleeve 1605 and the first piston 1608 move left, and the first oil Hydraulic oil is stored in the cylinder 1606, which presses oil into the two clamping bags 12, so that the clamping bags 12 can tightly wrap the steel pipe, making the clamping and fixing effect better. When the extrusion block 1702 is unlocked and the handle 1705, the third gear 1704 and the extrusion block 1702 are pulled to the right as a whole, the extrusion block 1702 squeezes the second movable plate 1721 and the corresponding fourth piston 1722 to move downward, and the corresponding fifth piston 1726 moves to the right and is stuck in the corresponding first slot 1604, thereby locking the second gear 1603, and then the steel pipe can be subjected to a drop hammer test.

[0043] In summary, the positioning and anti-slip fixture for steel pipe drop hammer test achieves the purpose of firmly clamping and preventing slipping, adjusting the placement height and locking, and meets people's usage needs.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0045] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the protection content of the present invention.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positioning and anti-drop fixture for a steel pipe drop weight test, comprising a base (1), characterized in that: A support platform (2) is fixed to the upper end surface of the base (1), and a movable plate (7) is symmetrically slidably connected to both sides of the support platform (2). The outer side of the movable plate (7) is connected to the top support rod (11) through a second spring (10), and the top support rod (11) passes through the movable plate (7). A clamping bag (12) is fixed to the inner end surface of the movable plate (7), and the clamping bag (12) is wrapped around the outer side of the top support rod (11). An oil pressure mechanism (16) is fixed to the bottom of the support platform (2), and the oil pressure mechanism (16) passes through the movable plate (7) and is connected to the clamping bag (12). The oil pressure mechanism (16) includes a support block (1601), and the support block (1601) is fixed to the bottom of the support platform (2); A locking mechanism (17) is fixed to one side of the support platform (2), and the locking mechanism (17) includes a support cylinder (1701), an extrusion block (1702) is slidably connected to the support cylinder (1701), a second oil cylinder (1723) is fixed to the top and the bottom of the support cylinder (1701), and a fourth piston (1722) is slidably connected to the two second oil cylinders (1723), a third oil cylinder (1725) is fixed to one side of the oil pressure mechanism (16) and one side of the support platform (2), and a fifth piston (1726) is slidably connected to the two third oil cylinders (1725), and the extrusion block (1702) is fixed to the top and the bottom of the support cylinder (1701). One side of the support tube (1701) is rotatably connected to a rotating shaft (1703), and the rotating shaft (1703) passes through one side of the support tube (1701) and is connected to the third gear (1704), a turning handle (1705) is fixed on one side of the third gear (1704), and a second groove (1706) is provided on one side of the turning handle (1705), a fourth spring (1707) is fixed in the second groove (1706), and a pressing block (1708) is fixed on one end of the fourth spring (1707), the pressing block (1708) is slidably connected in the second groove (1706), and a second piston (1709) is fixed on one side of the pressing block (1708), a first oil groove (1710) is provided in the turning handle (1705), and the second piston (1709) is slidably connected in the first oil groove (1710), A pressure oil pipeline (1711) is fixed in the rotating shaft (1703), and the head end of the pressure oil pipeline (1711) is connected to the first oil groove (1710). Second oil grooves (1713) are symmetrically provided on both sides of the extrusion block (1702). The end of the pressure oil pipeline (1711) is connected to the two second oil grooves (1713) through a second connecting pipeline (1712), and a third piston (1714) is slidably connected in the second oil groove (1713). Second clamping grooves (1715) are symmetrically provided on the two inner walls of the support cylinder (1701), and the second clamping grooves (1715) are evenly spaced on the two inner walls of the support cylinder (1701). The third piston (1714) The support tube (1701) is connected in the second card slot (1715), the inner top of the support tube (1701) is provided with a third groove (1716), and the third groove (1716) is fixed with a fifth spring (1717), the bottom of the fifth spring (1717) is fixed with a first movable plate (1718), and the first movable plate (1718) is slidably connected in the third groove (1716), the inner bottom of the support tube (1701) is provided with a fourth groove (1719), and the fourth groove (1719) is fixed with a sixth spring (1720), and the top of the sixth spring (1720) is fixed with a second movable plate (1721),The second movable plate (1721) is slidably connected in the fourth groove (1719), and a fourth piston (1722) is fixed to the top of the first movable plate (1718) and the bottom of the second movable plate (1721). A third oil cylinder (1725) is fixed to one side of the support block (1601) and one side of the support platform (2). The second oil cylinder (1723) at the top of the support cylinder (1701) is connected to the third oil cylinder (1725) on the support platform (2) through a third connecting pipe (1724), and the second oil cylinder (1723) at the bottom of the support cylinder (1701) is connected to the third oil cylinder (1725) on the support block (1601) through a third connecting pipe (1724).

2. The positioning and anti-slip fixture for steel pipe drop weight test according to claim 1, characterized in that: A first groove (3) is provided in the middle of the upper end surface of the support platform (2), and a first spring (4) is fixed in the first groove (3). A supporting plate (5) is fixed on the top of the first spring (4), and the supporting plate (5) is slidably connected in the first groove (3).

3. The positioning and anti-slip fixture for steel pipe drop weight test according to claim 1, characterized in that: A first screw rod (6) is rotatably connected to the support platform (2), and the two movable plates (7) are symmetrically threadedly connected to the outside of the first screw rod (6). A first gear (8) is fixed to one end of the first screw rod (6), and the other end of the first screw rod (6) is connected to the support platform (2) via a torsion spring (9).

4. The positioning and anti-slip fixture for steel pipe drop weight test according to claim 1, characterized in that: Limiting blocks (13) are symmetrically fixed on both sides of the top of one of the movable plates (7), and a flip cover (14) is rotatably connected to the top of the other movable plate (7), and limiting grooves (15) are symmetrically provided on both sides of the flip cover (14).

5. The positioning and anti-slip fixture for steel pipe drop weight test according to claim 1, characterized in that: A second screw rod (1602) is rotatably connected to the support block (1601), and a second gear (1603) is fixed to one end of the second screw rod (1602). A first slot (1604) is provided on one side of the second gear (1603) and one side of the first gear (8), and the first slots (1604) are evenly distributed circumferentially on the second gear (1603) and the first gear (8).

6. The positioning and anti-slip fixture for steel pipe drop weight test according to claim 5, characterized in that: The other end of the second screw rod (1602) is threadedly connected to a sleeve (1605), and a first piston (1608) is fixed to one end of the sleeve (1605). A first oil cylinder (1606) is fixed to the bottom of the support platform (2). The first piston (1608) is slidably connected in the first oil cylinder (1606), and the first piston (1608) is connected to an inner wall of the first oil cylinder (1606) through a third spring (1607). Two first connecting pipes (1609) are fixed to one side of the first oil cylinder (1606), and the two first connecting pipes (1609) respectively pass through the two movable plates (7), and the ends of the two first connecting pipes (1609) are respectively connected to the two clamping bags (12).

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