Front-clamping center-penetrating type tensioning jack

Abstract

The utility model discloses a front clamping center hole type tensioning jack, which relates to the technical field of tensioning jacks, and comprises a jack main body, a mounting frame is arranged below the jack main body, and four support frames are arranged between the mounting frame and the jack main body. The two supporting frames located at the front end of the jack body are of telescopic structures and are slidably connected with the mounting frame, and a clamping device is arranged on the peripheral side of the front end of the jack body in a surrounding mode. According to the front-clamping center-penetrating type tensioning jack, the supporting frame is arranged between the mounting frames and the jack body, and the two mounting frames located at the front end of the jack body are of a telescopic structure and are in sliding connection with the mounting frames, so that when a steel strand is pulled, if the steel strand and the jack body are located at different heights, the steel strand can be pulled; the jack main body can generate corresponding inclination, so that the jack main body and the steel strand are located on the same axis, and the inner wall of the front end of the jack main body can be prevented from being abraded.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning jacks, in particular to a front-clamp through-type tensioning jack. Background Art

[0002] Publication number: CN211169672U, name: A front-card through-type jack, which discloses: comprising a cylinder body, wherein one end of the cylinder body is provided with a positioning nut and a plug in sequence from the outside to the inside, and the other end of the cylinder body is provided with a sealing ring and a clamping ring in sequence from the inside to the outside, wherein the positioning nut is connected to one end of a force sensor, and the clamping ring is connected to the other end of the force sensor, and the displacement sensor is connected to the outer wall of the cylinder body, and one end of the piston passes through the clamping ring, the force sensor, the positioning nut, and the plug in sequence, and the other end passes through the sealing ring and the clamping ring in sequence, and the piston is a cavity structure, and the inner wall of the piston is provided with a card slot and a plurality of channels at the opposite end of the clamping ring, and the length direction of the channel is parallel to the axis of the piston, and the channel connects the card slot and the end face of the piston, and a flange is provided on the end face of the piston, and the flange is connected to the displacement sensor, and the displacement sensor is connected to the outer wall of the cylinder body, so as to facilitate the installation and removal of the tool anchor;

[0003] Although the above-mentioned disclosed content realizes the convenient installation and disassembly of the tool anchor, in actual use, during the pulling process of the bridge steel strand, the other end of the steel strand and the jack are often not at the same horizontal height, so that during the pulling process, the surrounding side of the steel strand will conflict with the front end of the jack, which can easily cause wear and deformation of the inner wall of the front end of the jack, thereby reducing the service life of the jack. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a front-engraving through-type tensioning jack, which solves the problem that although the above-mentioned disclosed content realizes the convenient installation and disassembly of the tool anchor, in actual use, during the pulling process of the bridge steel strand, the other end of the steel strand and the jack are often not at the same horizontal height, so that during the pulling process, the surrounding side of the steel strand will conflict with the front end of the jack, which can easily cause wear and deformation of the inner wall of the front end of the jack, thereby reducing the service life of the jack.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a front-card through-type tensioning jack, including a jack body, a mounting frame for lifting the jack body is arranged below the jack body, four support frames are arranged between the mounting frame and the jack body, the two support frames located at the front end of the jack body are telescopic structures and are slidably connected to the mounting frame, a clamping device is arranged around the circumference of the front end of the jack body, and a transmission device is slidably arranged on the circumference of the jack body, and the transmission device squeezes and drives the ends of the clamping device to approach each other.

[0006] Preferably, the support frame is rotatably connected to the circumferential side of the jack body, and the bottom ends of the two support frames located at the front end of the jack body are fixedly connected with a first T-shaped block, and the upper surface of the mounting frame is provided with a first T-shaped slot matching the first T-shaped block, and a spring is arranged in the first T-shaped slot, and the two ends of the spring are respectively fixedly connected to the first T-shaped slot and the first T-shaped block.

[0007] Preferably, the clamping device includes a plurality of first support rods, the middle portion of the side surface of the first support rod is rotatably connected to the jack body, the circumferential side of the jack body is slidably connected to a plurality of second T-shaped blocks, and a second support rod is rotatably connected between the end of the first support rod and the second T-shaped block.

[0008] Preferably, the other end of the first support rod is rotatably connected to a clamping block, and a second T-shaped groove matching the second T-shaped block is provided on the circumferential side of the jack body.

[0009] Preferably, the transmission device includes an extrusion ring sleeved on the circumferential side of the jack body, a fixing plate is provided at the tail end of the extrusion ring, the fixing plate and the extrusion ring are fixedly connected to each other via a fixing rod, and a driving device for driving the extrusion ring to slide is provided at the tail end of the jack body.

[0010] Preferably, the tail end of the jack body is fixedly connected to a fixed bracket, the fixed plate is arranged in the fixed bracket, and the driving device includes a hydraulic telescopic rod, and both ends of the hydraulic telescopic rod are fixedly connected to the fixed bracket and the fixed plate respectively.

[0011] Beneficial Effects

[0012] The utility model provides a front-cage through-type tensioning jack. Compared with the prior art, it has the following beneficial effects:

[0013] (1) The front-engraved tensioning jack has a support frame arranged between the mounting frame and the jack body, and the two mounting frames located at the front end of the jack body are of a telescopic structure and are slidably connected to the mounting frame. When the steel strand is pulled, if the steel strand and the jack body are at different heights, the jack body will tilt accordingly, so that the jack body and the steel strand are on the same axis, thereby avoiding wear of the steel strand and the inner wall of the front end of the jack body.

[0014] (2) The front-clamp through-type tensioning jack is provided with a clamping device on the peripheral side of the front end of the jack body, so that the steel strand can be limited before it passes through the jack body. Therefore, even if the steel strand and the jack body are worn due to the height difference, the clamping device can ensure that the steel strand between the clamping device and the jack body remains on the same axis as the jack body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded schematic diagram of the connection structure between the mounting frame and the jack body of the utility model;

[0017] Figure 3 It is an exploded schematic diagram of the structure of the jack body and the clamping device of the utility model;

[0018] Figure 4 It is an exploded schematic diagram of the connection structure of the clamping device and the transmission device of the utility model;

[0019] Figure 5 This is an exploded schematic diagram of the first support rod connection structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the mounting frame of the utility model.

[0021] In the figure: 1. mounting frame; 11. first T-slot; 2. support frame; 21. spring; 3. jack body; 31. second T-slot; 32. fixing bracket; 4. clamping device; 41. first support rod; 42. second support rod; 43. second T-block; 44. clamping block; 5. transmission device; 51. extrusion ring; 52. hydraulic telescopic rod; 6. driving device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-6The utility model provides a technical solution: a front-card through-type tensioning jack, including a jack body 3, a mounting frame 1 for lifting the jack body 3 is arranged below the jack body 3, four support frames 2 are arranged between the mounting frame 1 and the jack body 3, the two support frames 2 located at the front end of the jack body 3 are telescopic structures and are slidably connected with the mounting frame 1, a clamping device 4 is arranged around the circumference of the front end of the jack body 3, a transmission device 5 is slidably arranged around the circumference of the jack body 3, and the transmission device 5 squeezes and drives the ends of the clamping device 4 to approach each other.

[0024] Specifically, the jack body 3 is the existing technology, specifically a front-card through-type tensioning jack, the mounting frame 1 lifts and supports the jack body 3, the support frame 2 makes the jack body 3 suspended, and the two support frames 2 located at the front end of the jack body 3 are telescopic structures and are slidably connected to the mounting frame 1, so that when the steel strand is pulled, the jack body 3 is driven to tilt accordingly, thereby avoiding excessive friction between the surrounding side of the steel strand and the inner wall of the jack body 3, thereby affecting the service life. The setting of the clamping device 4 enables the steel strand to be clamped and limited before it passes into the jack body 3, so that the steel strand entering the jack body 3 remains on the same axis as the jack body 3.

[0025] The support frame 2 is rotatably connected to the circumferential side of the jack body 3, and the bottom ends of the two support frames 2 located at the front end of the jack body 3 are fixedly connected with a first T-shaped block, and the upper surface of the mounting frame 1 is provided with a first T-shaped groove 11 matching the first T-shaped block, and a spring 21 is arranged in the first T-shaped groove 11, and the two ends of the spring 21 are respectively fixedly connected to the first T-shaped groove 11 and the first T-shaped block.

[0026] Specifically, the support frame 2 slides stably on the mounting frame 1 through the cooperation of the first T-shaped block and the first T-shaped slot 11. The setting of the spring 21 drives the support frame 2 to reset after the use of the jack body 3, so that the jack body 3 can maintain a horizontal state again.

[0027] The clamping device 4 includes a plurality of first support rods 41, the middle portion of the side of the first support rod 41 is rotatably connected to the jack body 3, a plurality of second T-shaped blocks 43 are slidably connected to the circumferential side of the jack body 3, and a second support rod 42 is rotatably connected between the end of the first support rod 41 and the second T-shaped block 43.

[0028] Specifically, the second T-shaped block 43 slides, and under the support of the second support rod 42, drives the first support rod 41 to rotate, so that the ends of the first support rod 41 located in front of the jack body 3 are close to each other, clamping and limiting the steel strand.

[0029] The other end of the first support rod 41 is rotatably connected to a clamping block 44 , and a second T-shaped groove 31 matching the second T-shaped block 43 is provided on the circumference of the jack body 3 .

[0030] Specifically, the clamping block 44 contacts the steel strand to limit the position of the steel strand, and the second T-shaped block 43 slides stably with the cooperation of the second T-shaped groove 31 .

[0031] The transmission device 5 includes an extrusion ring 51 sleeved on the peripheral side of the jack body 3, a fixing plate is provided at the tail end of the extrusion ring 51, the fixing plate and the extrusion ring 51 are fixedly connected to each other via a fixing rod, and a driving device 6 is provided at the tail end of the jack body 3 to drive the extrusion ring 51 to slide.

[0032] Specifically, the squeezing ring 51 squeezes and drives the second T-shaped block 43 to slide, thereby realizing the rotation of the first support rod 41 , and the driving device 6 drives the squeezing ring 51 to slide.

[0033] The tail end of the jack body 3 is fixedly connected to a fixed bracket 32, a fixed plate is arranged in the fixed bracket 32, and the driving device 6 includes a hydraulic telescopic rod 52, both ends of which are fixedly connected to the fixed bracket 32 ​​and the fixed plate respectively.

[0034] Specifically, the hydraulic telescopic rod 52 is a prior art and provides power for the sliding of the extrusion ring 51 .

[0035] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] During operation, the steel strand is passed through the jack body 3, and then the hydraulic telescopic rod 52 is started. The squeezing ring 51 squeezes and drives the clamping device 4 to rotate, and then the position of the steel strand is adjusted so that the steel strand is located between the clamping blocks 44 until the clamping blocks 44 limit the steel strand, and then the jack body 3 is started.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front-entry through-type tensioning jack, comprising a jack body (3), characterized in that: A mounting frame (1) for lifting the jack body (3) is provided below the jack body (3); Four support frames (2) are arranged between the mounting frame (1) and the jack body (3); the two support frames (2) located at the front end of the jack body (3) are telescopic structures and are slidably connected to the mounting frame (1); A clamping device (4) is disposed around the front end of the jack body (3), and a transmission device (5) is slidably disposed around the front end of the jack body (3); The transmission device (5) squeezes and drives the ends of the clamping device (4) to move closer to each other.

2. A front-cage through-type tensioning jack according to claim 1, characterized in that: The support frame (2) is rotatably connected to the circumferential side of the jack body (3); the bottom ends of the two support frames (2) located at the front end of the jack body (3) are fixedly connected with a first T-shaped block; the upper surface of the mounting frame (1) is provided with a first T-shaped groove (11) matching the first T-shaped block; a spring (21) is arranged in the first T-shaped groove (11); and the two ends of the spring (21) are respectively fixedly connected to the first T-shaped groove (11) and the first T-shaped block.

3. The front-engraved tensioning jack according to claim 1, characterized in that: The clamping device (4) comprises a plurality of first support rods (41), the middle portion of the side of the first support rod (41) being rotatably connected to the jack body (3), a plurality of second T-shaped blocks (43) being slidably connected to the circumference of the jack body (3), and a second support rod (42) being rotatably connected between the end of the first support rod (41) and the second T-shaped block (43).

4. A front-engraved tensioning jack according to claim 3, characterized in that: The other end of the first support rod (41) is rotatably connected to a clamping block (44), and a second T-shaped groove (31) matching with the second T-shaped block (43) is provided on the peripheral side of the jack body (3).

5. The front-engraved tensioning jack according to claim 1, characterized in that: The transmission device (5) comprises an extrusion ring (51) sleeved on the circumference of the jack body (3); a fixing plate is provided at the rear end of the extrusion ring (51); the fixing plate and the extrusion ring (51) are fixedly connected to each other via a fixing rod; and a driving device (6) is provided at the rear end of the jack body (3) for driving the extrusion ring (51) to slide.

6. A front-engraved tensioning jack according to claim 5, characterized in that: The tail end of the jack body (3) is fixedly connected to a fixed bracket (32), the fixed plate is arranged in the fixed bracket (32), and the driving device (6) comprises a hydraulic telescopic rod (52), and the two ends of the hydraulic telescopic rod (52) are respectively fixedly connected to the fixed bracket (32) and the fixed plate.

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