Jack whole bundle penetrating device

Abstract

The utility model relates to the technical field of whole bundle steel strand pulling equipment, in particular to a jack whole bundle pulling device which comprises a bundle pulling jack and a clamping jack, and the bundle pulling jack comprises a first cylinder body, a first piston and a bundle pulling channel penetrating through the two ends of the first cylinder body; the clamping jack comprises a second cylinder body, a second piston, a supporting channel penetrating through the two ends of the second cylinder body and a clamping assembly, the supporting channel communicates with the strand penetrating channel, the first piston is fixedly connected with the first end of the second cylinder body, and the clamping assembly is connected with the second end of the second cylinder body; and when the second piston moves towards the first end, the clamping assembly can be driven to do clamping action, and when the second piston moves towards the first end, the clamping assembly does loosening action and recovers to the initial state. The whole steel strand in the supporting channel is clamped and fixed through the clamping assembly, the clamping jack is circularly pushed through the strand pulling jack, strand pulling operation can be conducted on the whole steel strand formed after the multiple steel strands are gathered, and the strand pulling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bunching steel strand threading equipment, and specifically relates to a jack bunching threading device. Background Art

[0002] In the construction of bridge and railway foundations, when installing precast concrete box girders, multiple steel strands need to be threaded into the prepared corrugated pipe ducts. The traditional construction method is to thread single steel strands into the corrugated pipe ducts in sequence. However, after multiple threadings, the steel strands are prone to being twisted, which affects the tensioning effect. In serious cases of twisting, safety accidents may occur. Therefore, it is changed to first comb multiple steel strands into a bunch, then fix the ends of the multiple steel strands combed into a bunch through a guiding wire pre-threaded in the corrugated pipe duct, and then use mechanical equipment for traction threading. The operation is complex, and multiple people are required to construct at both ends of the precast concrete box girder simultaneously, resulting in low threading efficiency.

[0003] A patent document with the application number 202410788911.9 discloses an anchor hole threading tensioning system with self-positioning anchor holes, including a moving frame that performs spatial movement. A jack for providing tensile force to the steel strands is horizontally fixed on the moving frame. A cutting machine frame is assembled on the moving frame and slides along the output direction of the jack. Two conveying mechanisms for jointly conveying the steel strands are vertically symmetrically installed on the cutting machine frame. A clamping mechanism for synchronously clamping multiple steel strands is fixedly assembled on the cutting machine frame; the system provided by the present invention avoids the trouble of repeatedly disassembling and assembling the anchor and clamping pieces during the process of tensioning the steel strands in the existing construction, is convenient to operate, is more time-saving and labor-saving, and has higher overall efficiency.

[0004] The jack structure in the above comparative document is used to clamp and push multiple steel strands inside it, mainly playing the role of simultaneously conveying multiple steel strands separately distributed in a circumferential array form, and cannot perform threading operations on the bunch of steel strands after the convergence of multiple steel strands, and cannot accurately control the exposed length of the bunch of steel strands after passing through the corrugated pipe duct. Utility Model Content

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a jack bunching threading device, which can perform threading operations on the bunch of steel strands after the convergence of multiple steel strands and improve the threading efficiency.

[0006] To solve the above technical problems, the present utility model provides a jack for integral strand threading device, including a threading jack, which comprises a first cylinder body, a first piston disposed within the first cylinder body, and a threading channel penetrating through both ends of the first cylinder body; a clamping jack, which comprises a second cylinder body, a second piston disposed within the second cylinder body, a support channel penetrating through both ends of the second cylinder body, and a clamping assembly, wherein the support channel is in communication with the threading channel, the first piston is fixedly connected to the first end of the second cylinder body, the clamping assembly is connected to the second end of the second cylinder body, when the second piston moves towards the second end, it can drive the clamping assembly to perform a clamping action, and when the second piston moves towards the first end, the clamping assembly performs a loosening action and returns to its initial state.

[0007] Preferably, in the above solution, the clamping assembly includes a support sleeve and clamping pieces, the support sleeve is installed outside the second end, the outlet of the support sleeve is in communication with the support channel, the clamping pieces are radially movably disposed on the inner periphery of the outlet of the support sleeve, the clamping pieces are slidably connected to the second piston, and the second piston is used to drive the clamping pieces to perform a clamping action.

[0008] Preferably, in the above solution, the clamping pieces are arranged in a three-lobe structure, and bevel angles are provided on the separation surfaces on both sides of the clamping pieces.

[0009] Preferably, in the above solution, the clamping assembly further includes a spring, adjacent two clamping pieces are elastically connected by the spring, when the second piston drives the clamping pieces to perform a clamping action, the spring is in a compressed state, and when the clamping assembly returns to its initial state, the spring is in a relaxed state.

[0010] Preferably, in the above solution, the clamping assembly further includes a three-finger claw and a slider, the three-finger claws are arranged on the outer periphery of the outlet of the support sleeve in a circumferential array and are fixedly connected to the slider, the slider is fixedly connected to the clamping pieces, and the slider is slidably connected to the support sleeve.

[0011] Preferably, in the above solution, the threading jack and the clamping jack are arranged coaxially, the threading channel is arranged coaxially with the threading jack, and the support channel is arranged coaxially with the clamping jack.

[0012] Preferably, in the above solution, the threading channel penetrates through both ends of the first piston, the support channel penetrates through both ends of the second piston, inclined surfaces are provided at both ends of the second piston, and the clamping assembly is provided with a conical surface adapted to the inclined surfaces.

[0013] Preferably, the above scheme further comprises a hydraulic system, the beam threading jack and the clamping jack are both hydraulic jacks, and the hydraulic system is connected to the beam threading jack and the clamping jack respectively.

[0014] Preferably, the above scheme further comprises a limiting assembly, which is arranged outside the entrance of the bundle threading channel and is used to clamp and fix the entire bundle of steel strands entering the bundle threading channel.

[0015] Preferably, in the above scheme, the limiting assembly includes a hydraulic chuck, the inner wall of the hydraulic chuck is slidably connected to the side of the entire bundle of steel strands, and the hydraulic chuck is connected to the hydraulic system.

[0016] Compared with the existing technology, the utility model has the following beneficial effects:

[0017] 1. A jack-type bundle threading device in the utility model includes a bundle threading jack and a clamping jack. The bundle threading jack includes a first cylinder, a first piston, and a bundle threading channel that runs through both ends of the first cylinder; the clamping jack includes a second cylinder, a second piston, a support channel that runs through both ends of the second cylinder, and a clamping assembly. The support channel is connected to the bundle threading channel, the first piston is fixedly connected to the first end of the second cylinder, and the clamping assembly is connected to the second end of the second cylinder. When the second piston moves toward the second end, it can drive the clamping assembly to perform a clamping action. When the second piston moves toward the first end, the clamping assembly releases and returns to its initial state. The clamping assembly is driven by the clamping jack to clamp and fix the entire bundle of steel strands in the support channel. The bundle threading jack pushes the clamping jack cyclically, so that the entire bundle of steel strands after multiple steel strands are gathered can be threaded, thereby improving the efficiency of threading.

[0018] 2. The clamp in the utility model can be radially movably arranged on the inner peripheral edge of the outlet of the support sleeve. The clamp is slidably connected to the second piston. The second piston can drive the clamp to clamp or release. The clamp is arranged as a three-petal structure. The separation surfaces on both sides of the clamp are provided with bevel angles, which can effectively increase the clamping stability of the entire bundle of steel strands.

[0019] 3. In the utility model, two adjacent clamps are elastically connected by a spring. When the second piston drives the clamp to perform a clamping action, the spring is in a compressed state. When the clamping assembly returns to its initial state, the spring is in a relaxed state. The relaxed spring can stretch the clamps apart and move them away from each other, thereby realizing the automatic resetting function of the clamping assembly. When the spring is compressed, the clamp drives the slider and the three-finger claw to move and close along the radial direction of the outlet of the support sleeve, thereby clamping and fixing the entire bundle of steel strands inside the support channel. When the clamp is opened, the three-finger claw can reduce the gap between the three-petal clamp, thereby playing the role of gathering multiple steel strands and avoiding loose clamping and uneven force on the entire bundle of steel strands.

[0020] 4. In the present utility model, a tendon threading channel runs through both ends of the first piston, and a support channel runs through both ends of the second piston. Both ends of the second piston are provided with inclined surfaces, and the clamping assembly is provided with a conical surface adapted to the inclined surfaces. When the second piston moves towards the second end, the inclined surfaces and the conical surface abut against each other, and the clamping assembly can be gradually squeezed to close, which can meet the clamping and fixing requirements of entire-bundle steel strands with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic diagram of the overall structure of an entire-bundle tendon threading device of a jack according to the present utility model.

[0022] Figure 2 FIG. 2 is a schematic diagram of the internal structure of an entire-bundle tendon threading device of a jack according to the present utility model.

[0023] Figure 3 FIG. 3 is a schematic diagram of the internal structure of a clamping jack in the released state according to the present utility model.

[0024] Figure 4 FIG. 4 is a schematic diagram of the internal structure of a clamping jack in the clamped state according to the present utility model.

[0025] Figure 5 FIG. 5 is a schematic diagram of the separation surface structure of a three-piece structure clamping piece according to the present utility model.

[0026] Among them, 1 - tendon threading jack, 11 - tendon threading channel, 12 - first cylinder block, 13 - first piston, 2 - clamping jack, 21 - support channel, 22 - clamping assembly, 221 - support sleeve, 222 - clamping piece, 223 - spring, 224 - three-finger claw, 225 - slider, 23 - second cylinder block, 24 - second piston, 3 - limit assembly, 31 - hydraulic chuck, 32 - wire inlet frame, 33 - rotating roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, 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. Therefore, it should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there are descriptions of the terms "first", "second", "third", etc., they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following will describe the embodiments according to the overall structure of the present utility model.

[0031] As Figure 1 , Figure 2 shown, the present utility model discloses a jack whole-bundle strand threading device, which includes a strand threading jack 1 and a clamping jack 2. The strand threading jack 1 includes a first cylinder body 12, a first piston 13, and a strand threading channel 11 penetrating through both ends of the first cylinder body; the clamping jack 2 includes a second cylinder body 23, a second piston 24, a support channel 21 penetrating through both ends of the second cylinder body, and a clamping assembly 22. The support channel 21 is communicated with the strand threading channel 11. The first piston 13 is fixedly connected to the first end of the second cylinder body 23, and the clamping assembly 22 is connected to the second end of the second cylinder body 23. When the second piston 24 moves towards the second end, it can drive the clamping assembly 22 to perform a clamping action. When the second piston 24 moves towards the first end, it can drive the clamping assembly 22 to perform a loosening action and return to the initial state. In this embodiment, the clamping jack 2 drives the clamping assembly 22 to clamp and fix the whole-bundle steel strands in the support channel 21, and the strand threading jack 1 performs cyclic pushing on the clamping jack 2, so as to perform strand threading operations on the whole-bundle steel strands after the convergence of multiple steel strands, improving the strand threading efficiency.

[0032] Continue to refer to Figure 3 、 Figure 4 and Figure 5 In this embodiment, the clamping assembly 22 includes a support sleeve 221, a clamping piece 222, a spring 223, a three-finger claw 224 and a slider 225. The support sleeve 221 is installed on the outer side of the second end of the second cylinder body 23. The outlet of the support sleeve 221 is communicated with the support channel 21. The clamping piece 222 is radially movably arranged on the inner peripheral edge of the outlet of the support sleeve 221. The clamping piece 222 is slidably connected with the second piston 24. The second piston 24 is used to drive the clamping piece 222 to perform a clamping action. The clamping piece 222 is arranged in a three-lobe structure. The separation surfaces on both sides of the clamping piece 222 are provided with chamfers, and the chamfer angle is set between 1° and 12°, which can effectively increase the clamping stability of the whole bundle of steel strands. Adjacent two clamping pieces 222 are elastically connected by a spring 223. When the second piston 24 drives the clamping piece 222 to perform a clamping action, the spring 223 is in a compressed state. When the clamping assembly 22 returns to its initial state, the spring 223 is in a relaxed state. The relaxation of the spring 223 can push open the clamping piece 222, making them move away from each other, realizing the function of automatic reset of the clamping assembly 22. The three-finger claws 224 are arranged on the outer peripheral edge of the outlet of the support sleeve 221 in a circumferential array and are fixedly connected with the slider 225. The slider 225 passes through the chute opening on the peripheral edge of the outlet of the support sleeve 221 and is fixedly connected with the clamping piece 222. The slider 225 is slidably connected with the support sleeve 221. Each slider 225 is respectively connected with a three-finger claw 224 and a clamping piece 222. When the second piston 24 drives the clamping piece 222 to perform a clamping action, the spring 223 is compressed by force, and the clamping piece 222 drives the slider 225 and the three-finger claw 224 to move radially and close along the outlet of the support sleeve 221, so as to clamp and fix the whole bundle of steel strands inside the support channel 21. When the clamping piece 222 opens, the three-finger claw 224 can reduce the gap between the three-lobe clamping pieces, playing a role in gathering multiple steel strands, avoiding the looseness of the whole bundle of steel strands during clamping and uneven force. It should be noted that the inner surface of the clamping piece 22 is provided with a large-pitch spiral protrusion, which can increase the friction force between the clamping piece 222 and the outer side of the steel strand.

[0033] Furthermore, this embodiment proposes an assembly structure of a strand-passing jack 1 and a clamping jack 2. The strand-passing jack 1 and the clamping jack 2 are arranged coaxially. The strand-passing channel 11 is arranged coaxially with the strand-passing jack 1, the support channel 21 is arranged coaxially with the clamping jack 2, and the strand-passing channel 11 and the support channel 21 are arranged coaxially, which can improve the stability of the jack whole-strand passing device during operation. In addition, the strand-passing channel 11 penetrates through both ends of the first piston 13, the support channel 21 penetrates through both ends of the second piston 24, both ends of the second piston 24 are provided with inclined surfaces, and the clamping assembly 22 is provided with a conical surface adapted to the inclined surface, that is, the clamping piece 222 is provided with a conical surface. When the second piston 24 moves towards the second end, the inclined surface and the conical surface are in mutual contact, which can gradually squeeze the clamping pieces 222 of the clamping assembly 2 to close, and can meet the clamping and fixing requirements of whole-strand steel strands with different diameters. In addition, the inlet diameter of the second piston 24 is larger than the diameter of the strand-passing channel 11, and an inclined surface is provided at the inlet of the second piston 24 so that the whole-strand steel strand conveyed by the strand-passing channel 11 can enter the support channel 21 more smoothly.

[0034] It can be understood that a hydraulic system is further included in this embodiment. The strand-passing jack 1 and the clamping jack 2 are both hydraulic jacks. The hydraulic system is respectively connected to the strand-passing jack 1 and the clamping jack 2. The hydraulic system can respectively control the working states of the strand-passing jack 1 and the clamping jack 2, and can accurately control the exposed length of the whole-strand steel strand after passing through the corrugated pipe channel.

[0035] Furthermore, a limit component 3 is further included, which is arranged outside the inlet of the strand-passing channel 11 and is used for clamping and fixing the whole-strand steel strand entering the strand-passing channel 11. Specifically, the limit component 3 includes a hydraulic chuck 31. The inner wall of the hydraulic chuck 31 is slidably connected to the side surface of the whole-strand steel strand. The hydraulic chuck 31 is connected to the hydraulic system. Before the clamping assembly 22 releases the whole-strand steel strand and the first piston 13 returns, the hydraulic chuck 31 is used for clamping and fixing the whole-strand steel strand to prevent the whole-strand steel strand from retreating when the first piston 13 returns.

[0036] It is worth noting that the limit component 3 further includes a wire inlet frame 32 connected to the first cylinder block 12. Four rotating rollers 33 are arranged on the inner wall of the wire inlet frame 32 perpendicular to each other in pairs. The hydraulic chuck 31 is arranged inside the wire inlet frame 32 near the inlet of the strand-passing channel 11. When the whole-strand steel strand is fed into the wire inlet frame 32, the outer side surface of the whole-strand steel strand is slidably connected to the rotating rollers 33, which can prevent the whole-strand steel strand from having excessive friction with the inlet of the strand-passing channel 11.

[0037] Therefore, the functions realized by a jack whole-strand passing device in this embodiment are as follows:

[0038] (1) Clamping and pushing function

[0039] By setting the first piston to be fixedly connected with the first end of the second cylinder body, and the clamping assembly to be connected with the second end of the second cylinder body, when the second piston moves toward the second end, it can drive the clamping assembly to perform a clamping action, and when the second piston moves toward the first end, the clamping assembly performs a loosening action and returns to the initial state, and the bundle threading jack can perform a cyclic pushing action on the clamping jack, thereby realizing the jack clamping and pushing coordinated function, and can perform a bundle threading operation on the entire bundle of steel strands after multiple steel strands are gathered.

[0040] (2) Stable clamping function

[0041] The clamp is radially movable on the inner periphery of the outlet of the support sleeve, the clamp is slidably connected to the second piston, the second piston can drive the clamp to clamp or release, the clamp is arranged as a three-petal structure, and the separation surfaces on both sides of the clamp are provided with bevel angles, which can effectively increase the clamping stability of the entire bundle of steel strands.

[0042] (3) Elastic reset function

[0043] By setting two adjacent clamps to be elastically connected by a spring, when the second piston drives the clamp to perform a clamping action, the spring is in a compressed state, and when the clamping assembly returns to an initial state, the spring is in a relaxed state. The relaxed spring can stretch the clamps apart and move them away from each other, thereby realizing the function of elastic automatic resetting of the clamping assembly.

[0044] (4) Convergence and convergence function

[0045] By arranging the three-finger claws in a circular array on the outer periphery of the outlet of the support sleeve and fixedly connected to the slider, the slider is fixedly connected to the clamp, and the slider is slidably connected to the support sleeve, when the clamp is opened, the three-finger claws can reduce the gap between the three-petal clamps, play the role of gathering multiple steel strands, and avoid loose clamping and uneven force on the entire bundle of steel strands.

[0046] (5) Multiple diameter adaptation function

[0047] The clamping assembly is provided with a conical surface adapted to the inclined surface. When the second piston moves toward the second end, the inclined surface and the conical surface abut against each other, which can gradually squeeze the clamping assembly to close, thereby meeting the clamping and fixing requirements of a whole bundle of steel strands of different diameters.

[0048] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A jack whole-bundle cable threading device, characterized in that, Comprising: A strand-pulling jack, which includes a first cylinder body, a first piston disposed within the first cylinder body, and a strand-pulling channel that penetrates through both ends of the first cylinder body; A clamping jack, which includes a second cylinder body, a second piston disposed within the second cylinder body, a support channel that penetrates through both ends of the second cylinder body, and a clamping assembly. The support channel is in communication with the strand-pulling channel. The first piston is fixedly connected to the first end of the second cylinder body. The clamping assembly is connected to the second end of the second cylinder body. When the second piston moves towards the second end, it can drive the clamping assembly to perform a clamping action. When the second piston moves towards the first end, the clamping assembly performs a loosening action and returns to its initial state.

2. The jacking whole-bundle tendon threading device according to claim 1, characterized in that, The clamping assembly includes a support sleeve and clamping pieces. The support sleeve is installed on the outer side of the second end. The outlet of the support sleeve is in communication with the support channel. The clamping pieces are radially movably disposed on the inner peripheral edge of the outlet of the support sleeve. The clamping pieces are slidably connected to the second piston, and the second piston is used to drive the clamping pieces to perform a clamping action.

3. The jacking device for integral cable threading according to claim 2, characterized in that, The clamping pieces are arranged in a three-lobe structure, and the separation surfaces on both sides of the clamping pieces are provided with chamfers.

4. The jacking device for integral tendon threading according to claim 3, characterized in that, The clamping assembly further includes a spring. Adjacent clamping pieces are elastically connected by the spring. When the second piston drives the clamping pieces to perform a clamping action, the spring is in a compressed state. When the clamping assembly returns to its initial state, the spring is in a relaxed state.

5. The jacking whole-bundle cable threading device according to claim 4, characterized in that, The clamping assembly further includes a three-finger claw and a slider. The three-finger claw is arranged on the outer peripheral edge of the outlet of the support sleeve in a circumferential array and is fixedly connected to the slider. The slider is fixedly connected to the clamping piece, and the slider is slidably connected to the support sleeve.

6. The jacking device for integral cable threading according to claim 1, characterized in that The strand-pulling jack and the clamping jack are arranged coaxially. The strand-pulling channel is arranged coaxially with the strand-pulling jack, and the support channel is arranged coaxially with the clamping jack.

7. The jacking device for integral tendon threading according to claim 6, wherein, The strand-pulling channel penetrates through both ends of the first piston. The support channel penetrates through both ends of the second piston. Both ends of the second piston are provided with inclined surfaces, and the clamping assembly is provided with a conical surface adapted to the inclined surfaces.

8. The whole-bundle tendon threading device for a jack according to claim 1, characterized in that, It further includes a hydraulic system. The strand-pulling jack and the clamping jack are both hydraulic jacks, and the hydraulic system is respectively connected to the strand-pulling jack and the clamping jack.

9. The jacking device for integral cable threading according to claim 8, characterized in that, It further includes a limiting assembly, which is disposed outside the inlet of the strand-pulling channel and is used for clamping and fixing the entire bundle of steel strands entering the strand-pulling channel.

10. A jacking whole-bundle wire threading device according to claim 9, characterized in that, The limiting assembly includes a hydraulic chuck. The inner wall of the hydraulic chuck is slidably connected to the side surface of the entire bundle of steel strands, and the hydraulic chuck is connected to the hydraulic system.

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