Positioning anti-falling clamp for steel pipe drop weight test

Abstract

The invention relates to the technical field of steel pipe drop-weight tests, and discloses a positioning anti-drop clamp for a steel pipe drop-weight test, which comprises a base, an extrusion block is slidably connected in a support cylinder, second oil cylinders are fixed at the top and the bottom of the support cylinder, fourth pistons are slidably connected in the two second oil cylinders, and the fourth pistons are slidably connected in the support cylinder. Third oil cylinders are fixed to one side of the oil pressing mechanism and one side of the supporting table correspondingly, and fifth pistons are slidably connected into the two third oil cylinders correspondingly. According to the positioning anti-falling clamp for the steel pipe drop hammer test, certain hydraulic oil is initially stored in clamping bags, two moving plates are close to each other, the two clamping bags preliminarily clamp a steel pipe, then an extrusion block is unlocked, a rotating handle, a third gear and the extrusion block are continuously and integrally pulled rightwards, the third gear is rotated to drive a second gear to rotate, so that oil is pressed into the two clamping bags, and the steel pipe is clamped by the two clamping bags. And the clamping bag is more saturated, so that the clamping bag wraps the steel pipe in a more tightly attached mode, and the anti-falling effect is conveniently achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe drop hammer tests, and particularly to a positioning and anti - detachment clamp for steel pipe drop hammer tests. Background Technique

[0002] Double - sided submerged arc welded steel pipe is a kind of steel pipe formed by curling strip steel into a tubular shape through double - sided automatic submerged arc welding technology to form spiral welds. Due to its excellent pressure - bearing capacity and good corrosion resistance, double - sided submerged arc welded spiral steel pipes are widely used in long - distance transportation pipeline projects of oil and natural gas. During the production process of spiral steel pipes, since spiral steel pipes are gradually rolled up from strip steel through multiple rolls of rollers to form a circular pipe blank with an opening gap, and then formed through internal and external submerged arc welding, it is necessary to conduct drop hammer tests on spiral steel pipes. By conducting drop hammer tests on materials, the risk of brittle fracture that may occur under low - temperature or other specific conditions can be identified, thereby guiding the improvement and optimization of materials. Before conducting the drop hammer test on the steel pipe, it is necessary to clamp and fix the steel pipe with a clamp.

[0003] It is found that a typical fixture in the prior art, such as the one with the publication number CN119501453A, an internal - clamping type steel pipe welding fixture, belongs to the technical field of steel pipe welding. It includes components such as a bottom plate and a clamping wheel. The thread directions at both ends of the double - headed threaded rod are opposite. The double - headed threaded rod and the smooth rod are arranged side by side on the bottom plate. The output shaft of the first motor is connected with a first bevel gear, and a second bevel gear cooperating with the first bevel gear is fixedly installed in the middle of the double - headed threaded rod. Two clamping mechanisms are oppositely installed on the threaded sleeve. Two moving plates are symmetrically and slidably installed in the chutes at both ends of the bottom plate, and a placement table is fixed at the upper end of the moving plate. In the present invention, the clamping mechanism uses multiple contact parts to simultaneously perform multi - point positioning on the inside of the steel pipe, and can also adjust the height of the clamping mechanism. The steel pipe is directly stabilized in the air through the clamping mechanism, which can not only adjust two steel pipes to be welded to the concentric and non - deviated state, but also does not block the steel pipe, facilitating operations such as welding, grinding, and polishing, and improving the accuracy of butt joint and post - treatment.

[0004] The existing fixtures have relatively regular shapes and hard materials. During the clamping process, it is difficult for the fixtures to fit closely with the steel pipes, and the adaptability is not high. There is a risk that the steel pipes will slip off the fixtures, thus affecting the accuracy of the test position of the steel pipes. Moreover, excessive clamping is likely to damage the steel pipes. In view of the above problems, it is necessary to improve the existing equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a positioning and anti - detachment fixture for steel pipe drop - weight tests, so as to solve the problems proposed in the above - mentioned background technology. The existing fixtures have relatively regular shapes and hard materials. During the clamping process, it is difficult for the fixtures to fit closely with the steel pipes, the adaptability is not high, there is a risk of the steel pipes slipping off the fixtures, which affects the accuracy of the test position of the steel pipes, and excessive clamping is likely to damage the steel pipes.

[0006] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A positioning and anti - detachment fixture for steel pipe drop - weight tests, including a base. A support platform is fixed on the upper end surface of the base. On both sides inside the support platform, moving plates are symmetrically and slidably connected. The outer sides of the moving plates are connected to supporting rods through second springs. The supporting rods penetrate through the moving plates. The inner end surfaces of the moving plates are fixed with clamping sacs. The clamping sacs wrap around the outer sides of the supporting rods. A hydraulic oil pressing mechanism is fixed at the bottom of the support platform. The hydraulic oil pressing mechanism penetrates through the moving plates and communicates with the clamping sacs.

[0007] A locking mechanism is fixed on one side of the support platform. The locking mechanism includes a support cylinder. An extrusion block is slidably connected inside the support cylinder. Second oil cylinders are fixed at the top and the bottom of the support cylinder respectively. Fourth pistons are slidably connected inside the two second oil cylinders. Third oil cylinders are fixed on one side of the hydraulic oil pressing mechanism and one side of the support platform respectively. Fifth pistons are slidably connected inside the two third oil cylinders.

[0008] Working principle: Initially, there is a certain amount of hydraulic oil in the clamping bladder. The second spring and the supporting rod are used in combination to support the clamping bladder. First, rotate to open the flip cover and place the steel pipe on the supporting plate. Then, manually press the steel pipe to adjust its height and make it located between the two clamping bladders. Subsequently, rotate to close the flip cover, hold the pressing block, the second piston moves leftward, and the two third pistons move and leave the second card slot, thereby unlocking the extrusion block. Then, pull the rotating handle, the third gear, and the extrusion block as a whole to the right and make the third gear meshed and connected with the first gear. After releasing the pressing block, the third piston snaps into the corresponding second card slot, thus re-locking the extrusion block. Hold the rotating handle and rotate the third gear, which drives the first gear and the first lead screw to rotate. The two moving plates slide and approach each other, facilitating the initial clamping of the steel pipe. After unlocking the extrusion block by holding the pressing block, continue to pull the rotating handle, the third gear, and the extrusion block as a whole to the right. The extrusion block squeezes the first movable plate and the corresponding fourth piston to move upward, and the corresponding fifth piston moves rightward and snaps into the corresponding first card slot, thereby locking the first gear. After meshing the third gear with the second gear and then releasing the pressing block to lock the extrusion block, hold the rotating handle and rotate the third gear, which drives the second gear and the second lead screw to rotate. The sleeve and the first piston move leftward. There is hydraulic oil stored in the first oil cylinder, so as to press oil into the two clamping bladders, enabling the clamping bladders to tightly wrap around the steel pipe, making the clamping and fixing effect better. When unlocking the extrusion block and squeezing the rotating 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 rightward and snaps into the corresponding first card slot, thereby locking the second gear. Subsequently, a drop hammer test can be carried out on the steel pipe.

[0009] Preferably, a first groove is formed in the middle of the upper end surface of the support table, and a first spring is fixed in the first groove. The top of the first spring is fixed with a support plate, and the support plate is slidably connected in the first groove.

[0010] Preferably, a first lead screw is rotatably connected to the support table. The two moving plates are symmetrically threadedly connected to the outside of the first lead screw. One end of the first lead screw is fixed with a first gear, and the other end of the first lead screw is connected to the support table through a torsion spring.

[0011] Preferably, two limit blocks are symmetrically fixed on both sides of the top of one of the moving plates, and a flip cover is rotatably connected to the top of the other moving plate. Limit grooves are symmetrically formed on both sides of the flip cover.

[0012] Preferably, the oil pressing mechanism includes a support block, and the support block is fixed to the bottom of the support table. A second lead screw is rotatably connected to the support block, and one end of the second lead screw is fixed with a second gear. First card slots are formed on one side of the second gear and one side of the first gear, and the first card slots are circumferentially and evenly distributed on the second gear and the first gear.

[0013] Preferably, the other end of the second lead screw is threadedly connected with a sleeve, and a first piston is fixed to one end of the sleeve. 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. Two first connecting pipes are fixed to one side of the first oil cylinder, and the two first connecting pipes respectively penetrate through the two moving plates. The ends of the two first connecting pipes are respectively communicated with the two clamping sacs.

[0014] Preferably, a rotating shaft is rotatably connected to one side of the extrusion block, and the rotating shaft penetrates through one side of the support cylinder and is connected to a third gear. A rotating handle is fixed to one side of the third gear, and a second groove is formed in one side of the rotating handle. A fourth spring is fixed in the second groove, and one end of the fourth spring is fixed with a pressing block. The pressing block is slidably connected in the second groove, and a second piston is fixed to one side of the pressing block. A first oil groove is formed in the rotating handle, and the second piston is slidably connected in the first oil groove. An oil pressing pipe is fixed in the rotating shaft, and the head end of the oil pressing pipe is communicated with the first oil groove. Second oil grooves are symmetrically formed on both sides of the extrusion block. The tail end of the oil pressing pipe is communicated with the two second oil grooves through a second connecting pipe, and a third piston is slidably connected in the second oil groove. Second clamping grooves are symmetrically formed on both inner walls of the support cylinder, and the second clamping grooves are equally spaced on both inner walls of the support cylinder. The third piston is snap-fitted in the second clamping groove.

[0015] Preferably, a third groove is formed in the inner top of the support cylinder, and a fifth spring is fixed in the third groove. The bottom of the fifth spring is fixed with a first movable plate, and the first movable plate is slidably connected in the third groove. A fourth groove is formed in the inner bottom of the support cylinder, and a sixth spring is fixed in the fourth groove. The top of the sixth spring is fixed with a second movable plate, and the second movable plate is slidably connected in the fourth groove. Fourth pistons are fixed to the top of the first movable plate and the bottom of the second movable plate.

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

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The positioning and anti - detachment fixture for steel pipe drop - hammer test can achieve the purpose of firmly clamping and preventing detachment through the mutual cooperation of the first gear, the second spring, the top - support rod, the clamping bladder, the second gear, the extrusion block, the third gear, the turning handle and the pressing block. There is a certain amount of hydraulic oil initially stored in the clamping bladder. The second spring and the top - support rod can be used together to push open the clamping bladder. After placing the steel pipe, press the pressing block to unlock the extrusion block, then pull the turning handle, the third gear and the extrusion block to the right as a whole. After meshing the third gear with the first gear and connecting them together, release the pressing block to lock the extrusion block. Rotate the third gear to drive the first gear to rotate, and the two moving plates move closer to each other. The two clamping bladders initially clamp the steel pipe. Then unlock the extrusion block and continue to pull the turning handle, the third gear and the extrusion block to the right as a whole. After meshing the third gear with the second gear and connecting them together, 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 bladders, making the clamping bladders more saturated, so that the clamping bladders can more closely fit and clamp the steel pipe, facilitating the achievement of the anti - detachment effect and playing a certain protective role.

[0018] 2. The positioning and anti - detachment fixture for steel pipe drop - hammer test can achieve the purpose of adjusting the placement height through the mutual cooperation of the support plate, the clamping bladder and the flip - cover. After opening the flip - cover and placing the steel pipe on the support plate, the height of the steel pipe can be manually pressed down to adjust the height of the steel pipe, so that the steel pipe can be located between the centers of the two clamping bladders, thus making the subsequent clamping effect better.

[0019] 3. The positioning and anti - detachment fixture for steel pipe drop - hammer test can achieve the purpose of locking through the mutual cooperation of the first gear, the second gear, the first card 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 meshing the third gear with the first gear or the second gear and connecting them together, 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. The corresponding fifth piston moves and snaps into the corresponding first card slot, facilitating the locking of the first gear or the second gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the right - hand perspective structure schematic diagram of the present invention; Figure 2 is the left - hand perspective structure schematic diagram of the present invention; Figure 3 is the front - view sectional structure schematic diagram of the present invention; Figure 4 is the structure schematic diagram of the locking mechanism of the present invention; Figure 5 is the connection structure schematic diagram of the support cylinder, the extrusion block, the rotating shaft, the oil - pressing pipeline, the second connecting pipeline, the second oil groove, the third piston and the second card slot of the present invention; Figure 6 Schematic diagram of the connection structure of the first lead screw, moving plate, top support rod and first connecting pipe of the present invention; Figure 7 Of the present invention Figure 1 Enlarged structure diagram at A in; Figure 8 Of the present invention Figure 1 Enlarged structure diagram at B in.

[0021] In the figure: 1, base; 2, support platform; 3, first groove; 4, first spring; 5, pallet; 6, first lead screw; 7, moving plate; 8, first gear; 9, torsion spring; 10, second spring; 11, top support rod; 12, clamping bladder; 13, limit block; 14, flip cover; 15, limit groove; 16, oil pressing mechanism; 1601, support block; 1602, second lead screw; 1603, second gear; 1604, first clamping groove; 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; 1704, third gear; 1705, turning handle; 1706, second groove; 1707, fourth spring; 1708, pressing block; 1709, second piston; 1710, first oil groove; 1711, oil pressing pipe; 1712, second connecting pipe; 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 pipe; 1725, third oil cylinder; 1726, fifth piston. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical staff in the art without creative work belong to the scope of protection of the present invention.

[0023] Please refer to Figures 1 to 8, the present invention provides a technical solution: a positioning and anti - detachment fixture for steel pipe drop hammer test, which includes a base 1. A support platform 2 is fixedly arranged on the upper end surface of the base 1. On both sides inside the support platform 2, moving plates 7 are symmetrically and slidably connected. The outer side of the moving plate 7 is connected to a top - support rod 11 through a second spring 10. The top - support rod 11 penetrates through the moving plate 7. The inner end surface of the moving plate 7 is fixedly provided with a clamping bladder 12, and the clamping bladder 12 wraps around the outer side of the top - support rod 11. A hydraulic oil pressing mechanism 16 is fixedly arranged at the bottom of the support platform 2, and the hydraulic oil pressing mechanism 16 penetrates through the moving plate 7 and is communicated with the clamping bladder 12.

[0024] A locking mechanism 17 is fixedly arranged on one side of the support platform 2. The locking mechanism 17 includes a support cylinder 1701. An extrusion block 1702 is slidably connected inside the support cylinder 1701. Second oil cylinders 1723 are fixedly arranged at both the top and the bottom of the support cylinder 1701. Fourth pistons 1722 are slidably connected inside both of the second oil cylinders 1723. Third oil cylinders 1725 are fixedly arranged on one side of the hydraulic oil pressing mechanism 16 and one side of the support platform 2. Fifth pistons 1726 are slidably connected inside both of the third oil cylinders 1725.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 3 shown, a first groove 3 is opened at the middle of the upper end surface of the support platform 2, and a first spring 4 is fixedly arranged inside the first groove 3. A support plate 5 is fixedly arranged at the top of the first spring 4, and the support plate 5 is slidably connected inside the first groove 3. The first spring 4 plays a role in propping up the support plate 5. After placing the steel pipe on the support plate 5, the height of the steel pipe can be manually pressed down to adjust the height of the steel pipe, so that the steel pipe can be located between the centers of the two clamping bladders 12, which is convenient for better positioning and clamping.

[0026] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 8 shown, a first lead screw 6 is rotatably connected to the support platform 2. The two moving plates 7 are symmetrically and threadedly connected to the outer side of the first lead screw 6. A first gear 8 is fixedly arranged at one end of the first lead screw 6, and the other end of the first lead screw 6 is connected to the support platform 2 through a torsion spring 9. When the first gear 8 rotates, it can drive the first lead screw 6 to rotate. At this time, the two moving plates 7 can slide under the limiting action of the support platform 2 and the first lead screw 6. The two moving plates 7 approach each other. The clamping bladder 12 filled with hydraulic oil can be used in combination to clamp the steel pipe, and the torsion spring 9 can assist the first lead screw 6 to rotate back to its original position.

[0027] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, on both sides of the top of one of the moving plates 7, limiting blocks 13 are symmetrically fixed. And on the top of the other moving plate 7, a flip cover 14 is rotatably connected. On both sides of the flip cover 14, limiting grooves 15 are symmetrically formed. Before placing the steel pipe, it is necessary to rotate and open the flip cover 14. After placing the steel pipe, the flip cover 14 can be rotated and closed. During the process of the two moving plates 7 approaching each other, the limiting blocks 13 slide into the limiting grooves 15, which is convenient for locking the flip cover 14.

[0028] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 8 shown, the oil pressing mechanism 16 includes a support block 1601, and the support block 1601 is fixed to the bottom of the support platform 2. A second lead screw 1602 is rotatably connected to the support block 1601, and a second gear 1603 is fixed to one end of the second lead screw 1602. On one side of the second gear 1603 and on one side of the first gear 8, first clamping grooves 1604 are formed, and the first clamping grooves 1604 are circumferentially and evenly distributed on the second gear 1603 and the first gear 8. When the second gear 1603 rotates, it can drive the second lead screw 1602 to rotate. When the fifth piston 1726 in the third oil cylinder 1725 on the support block 1601 is stuck into the first clamping groove 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 into the first clamping groove 1604 in the first gear 8, the first gear 8 can be locked.

[0029] In this embodiment, as Figure 3 and Figure 6 shown, the other end of the second lead screw 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 penetrate through the two moving plates 7. The ends of the two first connecting pipes 1609 are respectively communicated with the two clamping sacs 12. The first connecting pipes 1609 play a role in connecting the first oil cylinder 1606 and the clamping sacs 12. When the second lead screw 1602 rotates, the sleeve 1605 can move leftward under the limiting action of the second lead screw 1602 and the first oil cylinder 1606, thereby driving the first piston 1608 to move leftward, which is convenient for automatically pressing oil into the clamping sacs 12.

[0030] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 andFigure 8 As shown, a rotating shaft 1703 is rotatably connected to one side of the extrusion block 1702, and the rotating shaft 1703 penetrates through one side of the support cylinder 1701 and is connected to the third gear 1704. A rotating handle 1705 is fixed to one side of the third gear 1704, and a second groove 1706 is formed on one side of the rotating handle 1705. A fourth spring 1707 is fixed in the second groove 1706, and one end of the fourth spring 1707 is fixed with a pressing block 1708. The pressing block 1708 is slidably connected in the second groove 1706, and a second piston 1709 is fixed to one side of the pressing block 1708. A first oil groove 1710 is formed in the rotating handle 1705, and the second piston 1709 is slidably connected in the first oil groove 1710. An oil pressure pipeline 1711 is fixed in the rotating shaft 1703, and the head end of the oil pressure pipeline 1711 communicates with the first oil groove 1710. Second oil grooves 1713 are symmetrically formed on both sides of the extrusion block 1702. The tail end of the oil pressure pipeline 1711 communicates with the two second oil grooves 1713 through a second connecting pipeline 1712. A third piston 1714 is slidably connected in the second oil groove 1713. Second clamping grooves 1715 are symmetrically formed on the two inner walls of the support cylinder 1701, and the second clamping grooves 1715 are equally spaced on the two inner walls of the support cylinder 1701. The third piston 1714 is snap-connected in the second clamping groove 1715. The oil pressure pipeline 1711 and the second connecting pipeline 1712 serve to connect the first oil groove 1710 and the two second oil grooves 1713. When the pressing block 1708 is held down, the second piston 1709 moves leftward, and the two third pistons 1714 move under the action of oil pressure and leave the second clamping groove 1715, facilitating the unlocking of the extrusion block 1702. After the pressing block 1708 is released, the pressing block 1708 automatically pops open under the action of the fourth spring 1707, the second piston 1709 moves rightward, and the third piston 1714 snaps into the corresponding second clamping groove 1715, facilitating the re-locking of the extrusion block 1702. After unlocking the extrusion block 1702 and then pulling the rotating handle 1705, the third gear 1704, and the extrusion block 1702 to the right as a whole and making the third gear 1704 mesh and connect with the first gear 8, when the rotating handle 1705 is held by hand and the third gear 1704 is rotated, the first gear 8 can be driven to rotate. After pulling the rotating handle 1705, the third gear 1704, and the extrusion block 1702 to the right as a whole and making the third gear 1704 mesh and connect with the second gear 1603, when the rotating handle 1705 is held by hand and the third gear 1704 is rotated, the second gear 1603 can be driven to rotate.

[0031] In this embodiment, as Figure 3 and Figure 4As shown in the figure, a third groove 1716 is formed in the inner top of the support cylinder 1701, and a fifth spring 1717 is fixed in the third groove 1716. 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. A fourth groove 1719 is formed in the inner bottom of the support cylinder 1701, and a sixth spring 1720 is fixed in the fourth groove 1719. The top of the sixth spring 1720 is fixed with a second movable plate 1721, and the second movable plate 1721 is slidably connected in the fourth groove 1719. Fourth pistons 1722 are fixed to the top of the first movable plate 1718 and the bottom of the second movable plate 1721. The fifth spring 1717 acts as a top support for the first movable plate 1718, and the sixth spring 1720 acts as a top support for the second movable plate 1721. When the extrusion block 1702 moves to the right and presses 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 inserted into one of the first card slots 1604 on the first gear 8, which facilitates locking the first gear 8. When the extrusion block 1702 moves to the right and presses the second movable plate 1721, the second movable plate 1721 moves downward, and the corresponding fourth piston 1722 moves downward. The corresponding fifth piston 1726 moves to the right and is inserted into one of the first card slots 1604 on the second gear 1603, which facilitates locking the second gear 1603.

[0032] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 shown, third oil cylinders 1725 are 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. One of the third connecting pipes 1724 serves to connect the second oil cylinder 1723 at the top of the support cylinder 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 cylinder 1701 and the third oil cylinder 1725 on the support block 1601.

[0033] The usage method and advantages of the present invention: The positioning and anti - detachment fixture for steel pipe drop hammer test works as follows: As Figures 1 to 8As shown: Initially, there is a certain amount of hydraulic oil in the clamping bladder 12. The second spring 10 and the supporting rod 11 are used in combination to support the clamping bladder 12. First, rotate to open the flip cover 14 and place the steel pipe on the pallet 5. Then, manually press the steel pipe to adjust its height and position it between the two clamping bladders 12. Subsequently, rotate to close the flip cover 14. Hold the pressing block 1708, and the second piston 1709 moves leftward. The two third pistons 1714 move and leave the second card slot 1715, thereby unlocking the extrusion block 1702. Then, pull the rotary handle 1705, the third gear 1704, and the extrusion block 1702 to the right as a whole and engage the third gear 1704 with the first gear 8. After releasing the pressing block 1708, the third piston 1714 snaps into the corresponding second card slot 1715, thereby relocking the extrusion block 1702. Hold the rotary handle 1705 and rotate the third gear 1704, thereby driving the first gear 8 and the first lead screw 6 to rotate. The two moving plates 7 slide and approach each other to facilitate the initial clamping of the steel pipe. After unlocking the extrusion block 1702 by holding the pressing block 1708, continue to pull the rotary handle 1705, the third gear 1704, and the extrusion block 1702 to the right as a whole. The extrusion block 1702 squeezes the first movable plate 1718 and the corresponding fourth piston 1722 to move upward. The corresponding fifth piston 1726 moves rightward and snaps into the corresponding first card slot 1604, thereby locking the first gear 8. After engaging the third gear 1704 with the second gear 1603 and then releasing the pressing block 1708 to lock the extrusion block 1702, hold the rotary handle 1705 and rotate the third gear 1704, thereby driving the second gear 1603 and the second lead screw 1602 to rotate. The sleeve 1605 and the first piston 1608 move leftward. The first oil cylinder 1606 stores hydraulic oil, thereby pressing the oil into the two clamping bladders 12 so that the clamping bladders 12 can tightly wrap the steel pipe, making the clamping and fixing effect better. When unlocking the extrusion block 1702 and squeezing the rotary handle 1705, the third gear 1704, and the extrusion block 1702 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. The corresponding fifth piston 1726 moves rightward and snaps into the corresponding first card slot 1604, thereby locking the second gear 1603. Subsequently, a drop hammer test can be performed on the steel pipe.

[0034] In summary, the positioning and anti - detachment fixture for the steel pipe drop hammer test achieves the purposes of firm clamping and anti - detachment, adjusting the placement height, and locking, meeting people's usage requirements.

[0035] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

[0036] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only a simplified description for facilitating the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the protected content of the present invention.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positioning and anti - detachment fixture for steel pipe drop - hammer 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 a top support rod (11) via a second spring (10), and the top support rod (11) passes through the movable plate (7). A clamping capsule (12) is fixed to the inner end surface of the movable plate (7), and the clamping capsule (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 capsule (12); A locking mechanism (17) is fixed to one side of the support platform (2), and the locking mechanism (17) comprises a support cylinder (1701), 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), and 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 inside the two third oil cylinders (1725).

2. The positioning and anti - detachment fixture for steel pipe drop - hammer 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 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).

3. The positioning and anti - detachment fixture for steel pipe drop - hammer test according to claim 1, wherein: 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. A positioning and anti - detachment fixture for steel pipe drop - hammer 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 - detachment fixture for steel pipe drop - hammer test according to claim 1, wherein: The oil pressure mechanism (16) comprises 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 on the second gear (1603) and the first gear (8) in a circumferential direction.

6. The positioning and anti - detachment fixture for steel pipe drop - hammer test according to claim 5, characterized in that: The other end of the second lead screw (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 within the first oil cylinder (1606), and the first piston (1608) is connected to an inner wall of the first oil cylinder (1606) by 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 penetrate through the two moving plates (7). The ends of the two first connecting pipes (1609) are respectively in communication with the two clamping bladders (12).

7. A positioning and anti - detachment fixture for steel pipe drop - hammer test according to claim 5, characterized in that: A rotating shaft (1703) is rotatably connected to one side of the extrusion block (1702), and the rotating shaft (1703) penetrates through one side of the support cylinder (1701) and is connected to a third gear (1704). A rotating handle (1705) is fixed to one side of the third gear (1704), and a second groove (1706) is formed on one side of the rotating handle (1705). A fourth spring (1707) is fixed within the second groove (1706), and one end of the fourth spring (1707) is fixed to a pressing block (1708). The pressing block (1708) is slidably connected within the second groove (1706), and a second piston (1709) is fixed to one side of the pressing block (1708). A first oil groove (1710) is formed within the rotating handle (1705). The second piston (1709) is slidably connected within the first oil groove (1710). An oil pressure pipe (1711) is fixed within the rotating shaft (1703), and the head end of the oil pressure pipe (1711) is in communication with the first oil groove (1710). Second oil grooves (1713) are symmetrically formed on both sides of the extrusion block (1702). The end of the oil pressure pipe (1711) is in communication with the two second oil grooves (1713) through a second connecting pipe (1712), and a third piston (1714) is slidably connected within the second oil grooves (1713). Second clamping grooves (1715) are symmetrically formed on the two inner walls of the support cylinder (1701), and the second clamping grooves (1715) are equally spaced on the two inner walls of the support cylinder (1701). The third piston (1714) is snap-fitted within the second clamping grooves (1715).

8. A positioning and anti - detachment fixture for steel pipe drop - hammer test according to claim 7, characterized in that: A third groove (1716) is formed in the inner top of the support cylinder (1701), and a fifth spring (1717) is fixed in the third groove (1716). 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). A fourth groove (1719) is formed in the inner bottom of the support cylinder (1701), and a sixth spring (1720) is fixed in the fourth groove (1719). The top of the sixth spring (1720) is fixed with a second movable plate (1721), and the second movable plate (1721) is slidably connected in the fourth groove (1719). Fourth pistons (1722) are fixed to the top of the first movable plate (1718) and the bottom of the second movable plate (1721).

9. The positioning and anti - detachment fixture for steel pipe drop - hammer test according to claim 7, characterized in that: Third oil cylinders (1725) are 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).

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