A full telescopic conduit type anti-rotation tension jack

Abstract

The utility model discloses a full telescopic catheter formula anti -rotation tension jack, including front clamping top, main top and rear clamping top, the main top is equipped with fixed portion, and the piston portion of telescopic sliding connection with fixed portion, and the middle catheter of fixed in fixed portion, one end of front clamping top is fixedly connected with the extension end of piston portion, and the other end is equipped with first tool anchor plate, one end of front clamping top and piston portion connection is fixedly equipped with the front catheter of inserting middle catheter, the hole channel of one end of rear clamping top and through steel strand intercommunication, and the other end is equipped with second tool anchor plate, the outer periphery of rear clamping top still is equipped with the support leg for supporting main top, wherein, the depth of front catheter entering middle catheter is greater than the extension stroke of piston portion. The utility model discloses a full telescopic catheter formula anti -rotation tension jack, and the steel strand is supported, prevents the steel strand from drooping, enhances the rigidity of steel strand, and reduces the risk of nest cylinder.

Description

Technical Field

[0001] This utility model relates to the field of tension jacks, and in particular to a fully telescopic conduit-type anti-rotation tension jack. Background Technology

[0002] Currently, tension jacks used for moving heavy objects by pulling steel strands mainly include hydraulic cylinders, pistons, main jacks, front clamping jacks, rear clamping jacks, support legs, and guide tube components installed in the main jack's through-hole sleeve. However, with the development of marine engineering, the trend towards larger and more integrated structures is obvious. Large structures weighing over 30,000 tons are used on offshore platforms. These working conditions are characterized by limited space, large tonnage, a large number of steel strands, and horizontal construction, resulting in some defects and deficiencies in existing jack structures. For example, Chinese patent CN212615697U discloses an integral automatic tensioning jack, including a tensioning cylinder and a tensioning piston installed in the tensioning cylinder. The outer end of the tensioning piston is equipped with a tool anchor plate for clamping prestressed steel strands and a tool clamping piece installed in the conical hole of the tool anchor plate. The front end of the tensioning cylinder is connected to a support cylinder. The tensioning piston is equipped with a clamping piston. The front end of the clamping piston is connected to a front guide fixing plate. The front guide fixing plate is connected to a clamping plate clamping plate provided in the support cylinder. The rear end of the clamping piston is encapsulated with a clamping block with a through hole for the steel strand. The inner end face of the tool anchor plate facing the clamping block is connected to a top plate through a jacking pipe. One end of the jacking pipe is located in the conical hole of the tool anchor plate. The existing technology only has a guide tube structure fixed inside the main top. During the tensioning process, when the piston extends, the steel strand that is tensioned out of the main top along with the piston movement is not adequately supported. This causes the steel strand to sag easily under the action of gravity, which poses a risk of cylinder jamming. It also affects the uniformity of steel strand clamping and reduces the reliability of clamping. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a fully telescopic guide tube type anti-rotation tension jack, aiming to solve the problems of existing technology which only has a guide tube structure fixed inside the main jack, resulting in insufficient support for the steel strand inside the tension jack during the pulling of heavy objects. This causes the steel strand to sag easily under gravity, posing a risk of cylinder jamming, and also affects the uniformity of steel strand clamping, reducing the reliability of clamping.

[0004] The present invention achieves the above objectives by adopting the following technical solution:

[0005] A fully telescopic guide tube type anti-rotation tension jack for tensioning steel strands includes a front clamping jack, a main jack, and a rear clamping jack. The main jack has a fixed part, a piston part that is telescopically and slidably connected to the fixed part, and a middle guide tube fixed to the fixed part. One end of the front clamping jack is fixedly connected to the extended end of the piston part, and the other end is provided with a first tool anchor plate. The end of the front clamping jack connected to the piston part is fixedly provided with a front guide tube that is inserted into the middle guide tube. One end of the rear clamping jack communicates with a channel through which the steel strand passes, and the other end is provided with a second tool anchor plate. The outer periphery of the rear clamping jack is also provided with support feet for supporting the main jack. The depth to which the front guide tube enters the middle guide tube is greater than the extension stroke of the piston part.

[0006] In this technical solution, the inner diameter of the middle guide tube is relatively larger than that of the outer diameter of the front guide tube. The front guide tube can slide inside the middle guide tube following the extension and retraction of the piston. Therefore, during the operation of the jack in this technical solution, the middle guide tube and the front guide tube can penetrate the main top and the front clamping top of the jack, thereby supporting the steel strand, preventing the steel strand from sagging, increasing the rigidity of the steel strand, reducing the risk of cylinder jamming, and thus improving the uniformity and reliability of the steel strand clamping.

[0007] A further technical solution is that the rear clamping top is provided with a clamping plate that cooperates with the second tool anchor plate, and the clamping plate is also provided with a rear guide tube that is inserted into the middle guide tube. In this technical solution, the rear guide tube is selected as a guide tube with a smaller outer diameter than the inner diameter of the middle guide tube. By arranging the rear guide tube between the rear clamping top and the main top, the guide tube component runs through the entire interior of the jack. On the one hand, this facilitates the smooth passage of all steel strands; on the other hand, the front, middle, and rear guide tubes provide support for the entire steel strand inside the jack, preventing the steel strand from sagging, further reducing the risk of cylinder jamming, and improving the uniformity and reliability of steel strand clamping.

[0008] A further technical solution involves an outer diameter at the end of the rear guide tube connected to the clamping plate that is larger than the outer diameter of its tube body. The clamping plate includes a first flange and a second flange connected by bolts. The opposing end faces of the first and second flanges are provided with limiting grooves that mate with the end of the rear guide tube. This technical solution employs an expansion tube and flange structure connection at the end of the rear guide tube, thereby achieving a micro-motion effect. This solves the problems of structural deformation and poor fit with the corresponding middle guide tube caused by traditional welding methods, and also improves processing efficiency.

[0009] A further technical solution involves providing a matching anti-rotation rod and anti-rotation sleeve on the outside of the main top. The anti-rotation sleeve is fixed to the outer wall of the fixed part, and the anti-rotation rod is fixedly connected to the piston part, with its axis parallel to the extension and retraction trajectory of the piston part. Steel strands are generally made of multiple twisted steel wires and are in a tensile state under stress. After the load is released, they will rotate, and the clamps, piston part, and other components used with them will also rotate to some extent under stress. This technical solution, by employing a matching anti-rotation rod and anti-rotation sleeve, can prevent the steel strands from driving the piston part to rotate.

[0010] A further technical solution is that the anti-rotation sleeve is a graphite copper alloy sleeve. This graphite copper alloy sleeve ensures that a lubricating film forms when the anti-rotation rod passes through the anti-rotation sleeve, reducing wear on the anti-rotation rod and extending its service life.

[0011] A further technical solution is that the anti-rotation bar is a chrome-plated metal bar. The chrome plating treatment on the surface of the anti-rotation bar in this technical solution enhances its wear resistance and corrosion resistance.

[0012] A further technical solution involves connecting the front clamping top to the first tool anchor plate using two or more anti-rotation bolts. This technical solution can further improve the anti-rotation effect of the jack.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a fully telescopic guide tube type anti-rotation tension jack. Matching middle and front guide tubes are installed between the main jack and the front clamping jack to support the steel strand, prevent sagging, enhance the rigidity of the steel strand, reduce the risk of cylinder jamming, and thus improve the uniformity and reliability of steel strand clamping. Through the expansion tube and flange structure connection at the end of the rear guide tube, a micro-motion effect is achieved, allowing for better cooperation with the corresponding middle guide tube and improving processing efficiency. Furthermore, by installing matching anti-rotation components on the fixed part and piston part, the rotation of the piston part during jack operation is prevented. Attached Figure Description

[0015] Figure 1 Here is a schematic diagram of the structure of the fully telescopic guide tube anti-rotation tension jack described in this utility model.

[0016] Figure 2 See: A schematic diagram of the connection structure between the top loosening plate and the front guide tube of this utility model.

[0017] Figure 3 See: A schematic diagram of the connection structure between the clamping plate and the rear guide tube of this utility model.

[0018] In the picture:

[0019] 1. Main top; 11. Fixing part; 12. Piston part; 13. Middle guide tube; 14. Anti-rotation rod; 15. Anti-rotation sleeve; 16. I-beam bracket; 161. Support rod; 2. Front clamping top; 21. First tool anchor plate; 22. Top loosening plate; 220. Second limiting groove; 221. Third flange; 222. Fourth flange; 23. Front guide tube; 231. Second expansion tube end; 24. Anti-rotation bolt; 3. Rear clamping top; 31. Second tool anchor plate; 32. Support foot; 33. Rear guide tube; 331. First expansion tube end; 34. Pressure plate; 340. First limiting groove; 341. First flange; 342. Second flange. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1 to 3 The present invention will be described in detail below with specific embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] like Figure 1 As shown, this embodiment provides a fully telescopic conduit-type anti-rotation tension jack for tensioning steel strands, including a front clamping top 2, a main top 1, and a rear clamping top 3; the main top 1 is provided with a fixing part 11, a piston part 12 that is telescopically and slidably connected to the fixing part 11, and a middle conduit 13 fixed to the fixing part 11; one end of the front clamping top 2 is fixedly connected to the extended end of the piston part 12, and the other end is provided with a first tool anchor plate 21; the end of the front clamping top 2 connected to the piston part 12 is fixedly provided with a front conduit 23 that is inserted into the middle conduit 13; one end of the rear clamping top 3 is connected to the channel through which the steel strand passes, and the other end is provided with a second tool anchor plate 31; the outer periphery of the rear clamping top 3 is also provided with a support foot 32 for supporting the main top 1; wherein, the depth to which the front conduit 23 enters the middle conduit 13 is greater than the extension stroke of the piston part 12.

[0022] Specifically, the jack uses hydraulic power to drive the piston part 12 to extend and retract relative to the fixed part 11. The fixed part 11 has through holes corresponding to each steel strand. The middle guide tube 13 is fixedly connected to the fixed part 11 through an I-beam bracket 16. The end plates at both ends of the I-beam bracket 16 are respectively provided with through holes corresponding to the middle guide tube 13 and the steel strands. The two ends of the middle guide tube 13 are fixedly connected to the through holes corresponding to the end plates at both ends. The end plates at both ends are also fixedly connected by a support rod 161. At least one end plate is fixedly connected to the fixed part by screws. The end of the front clamping top 2 connected to the piston part 12 has through holes corresponding to each steel strand. Figure 2As shown, one end of the front guide tube 23 is fixedly connected to the corresponding through hole through a flange. The connection end between the front clamping top 2 and the piston part 12 is fixedly provided with a top loosening plate 22. The top loosening plate 22 has a through hole corresponding to the front guide tube 23. The outer diameter of the end of the front guide tube 23 connected to the top loosening plate 22 is larger than the outer diameter of its tube body, that is, one end of the front guide tube 23 is the second expansion tube end 231. The top loosening plate 22 includes a third flange 221 and a fourth flange 222 connected by bolts. The opposite end faces of the third flange 221 and the fourth flange 222 are provided with steps that match the size of the second expansion tube end. The through hole size of the fourth flange 222 is smaller than the outer diameter of the second expansion tube end. That is, the connected third flange 221 and the fourth flange 222 form a second limiting groove 220 that limits the second expansion tube end 231. The middle guide tube 13 is a guide tube with an inner diameter larger than the outer diameter of the tube body of the front guide tube 23. The front guide tube 23 can slide inside the middle guide tube 13 following the extension and retraction movement of the piston part 12. In this embodiment, the fully telescopic guide tube anti-rotation tension jack allows the middle guide tube 13 and the front guide tube 23 to penetrate the main jack 1 and the front clamping jack 2 during operation, thereby supporting the steel strand, preventing sagging, enhancing the rigidity of the steel strand, reducing the risk of cylinder jamming, and improving the uniformity and reliability of steel strand clamping. The use of an expansion tube end and flange structure connection enables micro-movement, solving the problems of structural deformation and poor fit with the corresponding middle guide tube 13 caused by traditional welding methods for the guide tube, and also improving processing efficiency.

[0023] In another embodiment, based on the above embodiment, the rear clamping top 3 is provided with a clamping plate 34 that cooperates with the second tool anchor plate 31. The clamping plate 34 is also provided with a rear guide tube 33 for inserting into the middle guide tube 13. Specifically, the clamping plate 34 is provided with through holes corresponding to each steel strand, such as... Figure 3As shown, one end of the rear guide tube 33 is fixedly connected to the corresponding through hole via a flange. Specifically, the outer diameter of the end of the rear guide tube 33 connected to the clamping plate 34 is larger than the outer diameter of its tube body, i.e., one end of the rear guide tube 33 is the expansion end 331. The clamping plate 34 includes a first flange 341 and a second flange 342 connected by bolts. The opposite end faces of the first flange 341 and the second flange 342 are provided with a limiting groove 340 that matches the expansion end 331. The limiting groove 340 specifically includes a step in the through hole of the first flange 341 that matches the size of the expansion end 331. The through-hole size of 42 is smaller than the outer diameter of the expansion tube end 331. That is, the first flange 341 and the second flange 342 after connection form a limiting groove 340 to limit the expansion tube end 331. The rear guide tube 33 is selected with a smaller outer diameter than the inner diameter of the middle guide tube 13. By arranging the rear guide tube 33 between the rear clamping top 3 and the main top 1, the guide tube component runs through the entire jack. On the one hand, it is easy for all steel strands to pass through smoothly. On the other hand, the front, middle and rear guide tubes support the entire steel strand inside the jack, prevent the steel strand from sagging, further reduce the risk of cylinder jamming, and improve the uniformity and reliability of steel strand clamping.

[0024] The above embodiments exemplify the specific installation methods of the middle conduit 13, the front conduit 23, and the rear conduit 33. In other embodiments or practical applications, other methods can be used instead. For example, the middle conduit 13, the rear conduit 33, and the front conduit 23 are all cylindrical tubes, and are fixedly connected to the corresponding through holes by welding or integral molding.

[0025] In another embodiment, based on the above embodiment, the main top 1 is provided with a matching anti-rotation rod 14 and an anti-rotation sleeve 15 on its exterior. The anti-rotation sleeve 15 is fixed to the outer wall of the fixed part 11. The anti-rotation rod 14 is fixedly connected to the piston part 12, and its axis is parallel to the extension and retraction trajectory of the piston part 12. Specifically, the anti-rotation rod 14 is fixedly connected to the piston part 12 through a transverse connecting rod, so that the anti-rotation rod 14 extends along the movement direction of the piston part 12 and cooperates with the anti-rotation sleeve 15. The steel strand is in a tensile state after being stressed, and will rotate after the load is converted and the force is released. The clamps, piston parts and other components used with it will also rotate to a certain extent under stress. This embodiment, by using the matching anti-rotation rod 14 and anti-rotation sleeve 15, can prevent the steel strand from driving the piston part 12 to rotate. In actual use, the number of anti-rotation sleeves 15 can be set according to the size of the anti-rotation sleeve 15 and the rotation force of the steel strand, and is not limited here.

[0026] In another embodiment, based on the above embodiment, the anti-rotation sleeve 15 is a graphite copper alloy sleeve. The graphite copper alloy sleeve can ensure that a lubricating film is formed when the anti-rotation rod 14 moves through the anti-rotation sleeve 15, reducing the wear of the anti-rotation rod 14 and extending its service life.

[0027] In another embodiment, based on the above embodiment, the anti-rotation rod 14 is a chrome-plated metal rod. Chrome plating the surface of the anti-rotation rod 14 can enhance its wear resistance and corrosion resistance.

[0028] In another embodiment, based on the above embodiment, the front clamping top 2 and the first tool anchor plate 21 are connected by two or more anti-rotation bolts 24, which can further improve the anti-rotation effect of the jack.

[0029] This utility model provides a fully telescopic guide tube type anti-rotation tension jack. A matching middle guide tube 13 and a front guide tube 23 are installed between the main jack 1 and the front clamping jack 2. These components support the steel strand, preventing sagging, enhancing its rigidity, reducing the risk of cylinder jamming, and improving the uniformity and reliability of the steel strand clamping. By connecting the rear guide tube 33 with an expansion tube and flange structure at its end, a micro-motion effect is achieved, allowing for better cooperation with the corresponding middle guide tube 13 and improving processing efficiency. Furthermore, by installing matching anti-rotation components on the fixed part 11 and the piston part 12, rotation of the piston part is prevented during jack operation.

Claims

1. A fully telescopic conduit-type anti-rotation tension jack for horizontal traction of steel strands and structures, characterized in that, Including the front clamping top, the main top, and the rear clamping top; The main top is provided with a fixing part, a piston part that is telescopically and slidably connected to the fixing part, and a central guide tube fixed to the fixing part; One end of the front clamping top is fixedly connected to the protruding end of the piston part, and the other end is provided with a first tool anchor plate; the end of the front clamping top connected to the piston part is fixedly provided with a front guide tube for inserting the middle guide tube; One end of the rear clamping top is connected to the channel through which the steel strand passes, and the other end is provided with a second tool anchor plate; the outer periphery of the rear clamping top is also provided with support feet for supporting the main top. The depth to which the front guide tube enters the middle guide tube is greater than the extension stroke of the piston section.

2. The fully telescopic conduit-type anti-rotation tension jack according to claim 1, characterized in that, The rear clamping top is provided with a clamping plate that cooperates with the second tool anchor plate, and the clamping plate is also provided with a rear guide tube into which the middle guide tube is inserted.

3. The fully telescopic conduit-type anti-rotation tension jack according to claim 2, characterized in that, The outer diameter of the end of the rear conduit connected to the clamping plate is larger than the outer diameter of its tube body; The clamping plate includes a first flange and a second flange connected by bolts; the opposite end faces of the first flange and the second flange are provided with limiting grooves that cooperate with the end of the rear guide tube.

4. The fully telescopic conduit-type anti-rotation tension jack according to claim 1, characterized in that, The main top is provided with a matching anti-rotation rod and anti-rotation sleeve on its exterior; the anti-rotation sleeve is fixed to the outer wall of the fixed part, and the anti-rotation rod is fixedly connected to the piston part, and its axis is parallel to the extension and retraction trajectory of the piston part.

5. A fully telescopic conduit-type anti-rotation tension jack according to claim 4, characterized in that, The anti-rotation sleeve is a graphite copper alloy sleeve.

6. The fully telescopic conduit-type anti-rotation tension jack according to claim 4, characterized in that, The anti-rotation rod is a chrome-plated metal rod.

7. The fully telescopic conduit-type anti-rotation tension jack according to claim 1, characterized in that, The front clamping top is connected to the first tool anchor plate by two or more anti-rotation bolts.

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