Modularized duct piece tensioning device

Abstract

The utility model relates to a modular duct piece tensioning device which comprises a fixed bottom frame, a movable bottom frame and a tensioning device. The clamping piece assembly is connected to the locking seat and comprises a working anchor cup and at least two working clamping pieces assembled in the working anchor cup, the matching surfaces of the working clamping pieces and the working anchor cup are conical surfaces, the at least two working clamping pieces are folded to form a locking hole used for clamping a steel strand, and the working anchor cup and the working clamping pieces are arranged in the locking hole. And the steel strand is tensioned to drive the conical surface of the working clamping piece to abut against the conical surface of the working anchor cup. And the locking bolt is used for locking the fixed underframe on the tunnel segment. And the fixed underframe is locked on the tunnel segment through the locking bolts so as to realize flexible disassembly and assembly. And the steel strand is locked by the clamping piece assembly, so that the steel strand can be quickly clamped, and the locking effect is good. The working clamping piece and the working anchor cup are matched through a conical surface, and the working clamping piece can automatically abut against the working anchor cup through pulling force borne by the steel strand, so that the self-locking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to a modular segment tensioning device. Background Art

[0002] During the tunneling construction process, tunnel segments are gradually laid as the tunneling equipment advances, and adjacent tunnel segments are locked by bolt assemblies. Due to the movable space between the tunnel segments and the tunneling channel and the different soil pressures under different soil environmental conditions, the spacing between tunnel segments or between multi-ring tunnel segments is unstable. The gap between two adjacent tunnel segments is sealed by a water-swelling water-stop ring. When the tunnel segments are offset, the waterproofing will fail and water will seep at the joints of the tunnel segments, which requires repair, which is difficult.

[0003] Chinese public document CN105422131A discloses a device for longitudinally tightening shield segments and a method for using the device, wherein multiple segments are tightened by the tightening device, so as to tighten the multi-ring tunnel segments by increasing the tensioning force. Chinese public document CN 218991608 U discloses a device for longitudinally tightening shield segment bars, so as to tighten multiple segments by steel strands.

[0004] However, the steel strand bite fixing method in the above device is complicated, and the overall structure construction process is complicated to operate, so it needs to be improved. Utility Model Content

[0005] In order to overcome the problems existing in the related art, an embodiment of the utility model provides a modular segment tensioning device.

[0006] According to a first aspect of an embodiment of the utility model, a modular segment tensioning device is provided, comprising:

[0007] A fixed base frame is provided with a locking seat;

[0008] A clip assembly connected to the locking seat, the clip assembly comprising a working anchor cup and at least two working clips assembled in the working anchor cup, the mating surfaces of the working clip and the working anchor cup being conical surfaces, the at least two working clips being closed together to form a locking hole for clamping the steel strand, and the tensioning of the steel strand drives the conical surface of the working clip to press against the conical surface of the working anchor cup;

[0009] The locking bolts are used to lock the fixed base frame to the tunnel segment.

[0010] In one embodiment, the locking hole has a hole wall with intermittently protruding biting convexities, and the biting convexities are used to increase the biting force on the steel strand.

[0011] In one embodiment, the clip assembly further comprises an elastic member elastically abutting against the working clip, and the elastic member is used to apply an elastic pre-tightening force to the working clip to move toward the conical surface.

[0012] In one embodiment, the clip assembly further includes an anchor cup end cover connected to the working anchor cup, and one end of the elastic member elastically pushes against the anchor cup end cover.

[0013] In one embodiment, it further comprises an unlocking assembly mounted on the fixed base frame, wherein the unlocking assembly movably pushes at least a portion of the working clip to separate from the conical surface of the working anchor cup to release the locking of the working clip on the steel strand.

[0014] In one embodiment, the unlocking assembly is mounted on the locking seat and is disposed opposite to the clip assembly, and the steel strand passes through a central hole of the unlocking assembly.

[0015] In one embodiment, the unlocking assembly includes a top block and an adjusting bolt, the top block is slidably connected to the locking seat, the adjusting bolt is spirally connected to the locking seat and pushes the top block, and the working clamp is located in the sliding direction of the top block.

[0016] In one embodiment, the fixed base frame is symmetrically arranged, and the fixed base frame includes a base plate, two docking plates and at least two reinforcing plates. The two docking plates are relatively fixed at both ends of the base plate, and the three sides of the reinforcing plate are respectively fixedly connected to the reinforcing plate and the base plate. The three sides of the locking seat are respectively fixedly connected to the two reinforcing plates and the base plate, and the locking seat and the docking plate are spaced apart.

[0017] In one embodiment, it further comprises an extension frame detachably connected to the fixed base frame, the extension frame is equipped with a clip assembly, and the clip assembly is used to lock the steel strand.

[0018] In one embodiment, the locking bolt includes a stop portion, a bolt portion protruding from the stop portion at both ends respectively, and a rotating portion, wherein the bolt portion is used to be spirally connected to the tunnel segment until the stop portion, and the rotating portion is provided with a wire passing hole, and the steel strand passes through the wire passing hole.

[0019] The technical solution provided by the embodiment of the utility model can include the following beneficial effects: the fixed base frame is locked to the tunnel segment by the locking bolts to achieve flexible disassembly and assembly. The clip assembly locks the steel strand, so that it can be clamped quickly and has a good locking effect. The working clip and the working anchor cup are matched through the conical surface, and the working clip can automatically press against the working anchor cup through the tension exerted on the steel strand, forming a self-locking effect.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0022] Figure 1 It is a schematic structural diagram showing a modular segment tensioning device according to an exemplary embodiment.

[0023] Figure 2 is a schematic top view showing a modular segment tensioning device according to an exemplary embodiment.

[0024] Figure 3 The figure is a partial cross-sectional schematic diagram showing a modular segment tensioning device according to an exemplary embodiment.

[0025] Figure 4 is a schematic diagram showing a clip assembly according to an exemplary embodiment.

[0026] Figure 5 It is a schematic structural diagram showing an extension frame of a modular segment tensioning device according to an exemplary embodiment.

[0027] In the figure, the base frame 10 is fixed; the locking seat 11; the docking plate 12; the bottom plate 13; the reinforcing plate 14; the clip assembly 20; the working anchor cup 21; the load hole 211; the working clip 22; the bite convex pattern 221; the conical surface 222; the elastic member 23; the anchor cup end cover 24; the unlocking assembly 30; the adjustment bolt 31; the top block 32; the steel strand 40; the locking bolt 50; the stopper 51; the rotating part 52; the bolt part 53; the pressurizing device 60; and the extension frame 70. DETAILED DESCRIPTION

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention 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, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figures 1 to 4 As shown, the utility model provides a modular segment tensioning device, which includes a fixed base frame 10, a clamping piece assembly 20 and a locking bolt 50. The locking bolt 50 is used to lock the fixed base frame 10 to the tunnel segment. The tunnel segment is provided with a bolt hole, which is a hoisting hole, a grouting hole, a connection hole, etc. provided on the tunnel segment. The locking bolt 50 passes through the fixed base frame 10 and is connected to the bolt hole to achieve a locking connection of the fixed base frame 10. The fixed base frame 10 is locked to the tunnel segment by the locking bolt 50 to achieve flexible disassembly and assembly.

[0032] In one embodiment, the locking bolt 50 includes a stopper 51, a bolt portion 53 protruding from the stopper 51 at both ends opposite to each other, and a rotating portion 52. The bolt portion 53 is used to be spirally connected to the tunnel segment until the stopper 51. The rotating portion 52 is provided with a wire hole, and the steel strand 40 shuttles along the wire hole. The stopper 51 and the bolt portion 53 constitute a spiral locking structure to lock the fixed base frame 10 to the tunnel segment. The rotating portion 52 protrudes from the stopper 51 to facilitate the locking bolt 50 to rotate and bear force, and does not affect the shuttle of the steel strand 40.

[0033] The fixed base frame 10 is provided with a locking seat 11, and the fixed base frame 10 is provided with a threading channel for inserting the steel strand 40. The locking seat 11 is located on the threading channel and has a corresponding through hole. Preferably, the fixed base frame 10 is symmetrically arranged so that the clip assembly 20 can be installed at both ends to realize the locking structure of the steel strand 40.

[0034] The clip assembly 20 is connected to the locking seat 11, and the steel strand 40 is inserted through the clip assembly 20. The clip assembly 20 is used to clamp and lock the steel strand 40. The clip assembly 20 includes a working anchor cup 21 and at least two working clips 22 assembled in the working anchor cup 21. The matching surface of the working clip 22 and the working anchor cup 21 is a conical surface 222. At least two working clips 22 are closed to form a locking hole for clamping the steel strand 40. The tension of the steel strand 40 drives the conical surface 222 of the working clip 22 to press against the conical surface 222 of the working anchor cup 21. The number of working clips 22 can be set to 2-6 pieces. Specifically, the number of working clips 22 can be set to two, three, four or six pieces. The side of the working clip 22 inserted into the working anchor cup 21 is set as an outer conical surface, and the working anchor cup 21 is provided with a through-hole-shaped load hole 211. The load hole 211 is partially set as an inner conical surface to match the outer conical surface of the working clip 22. Preferably, the taper angle of the load hole 211 is greater than or equal to the taper angle of the working clamp 22 .

[0035] The clamp assembly 20 locks the steel strand 40, so that it can be clamped quickly and has a good locking effect. The working clamp 22 and the working anchor cup 21 are matched through the conical surface, and the working clamp 22 can automatically press against the working anchor cup 21 through the tension exerted on the steel strand 40, forming a self-locking effect.

[0036] A plurality of working clamps 22 are closed to clamp the steel strand 40, and there is a gap between two adjacent working clamps 22, so that they abut against the inner conical surface of the working anchor cup 21 under the tension of the steel strand 40, so as to form an automatic clamping and pressurizing structure. Furthermore, the hole wall of the locking hole has intermittently protruding bite convex patterns 221, and the bite convex patterns 221 are used to improve the bite force on the steel strand 40. The bite convex patterns 221 are convex points or convex rib structures, such as the bite convex patterns 221 can be set as a patterned convex tooth structure; or, the bite convex patterns 221 are set as a convex tooth structure formed by processing grooves or a threaded structure or a parallel convex rib structure. Preferably, the bite convex patterns 221 are set as threaded structures to improve processing convenience and bite ability.

[0037] In one embodiment, the clip assembly 20 also includes an elastic member 23 elastically abutting against the working clip 22, and the elastic member 23 is used to apply an elastic preload force to the working clip 22 to move in the direction of the conical surface. The elastic member 23 applies an elastic preload force to the large end of the working clip 22 to push the working clip 22 to always keep moving toward the small end. Optionally, the elastic member 23 is configured as a preload spring to elastically abut against the large ends of multiple working clips 22. Optionally, the elastic member 23 is configured as a disc spring or an elastic sleeve to elastically abut against the large ends of multiple working clips 22. Under the elastic force of the elastic member 23, the working clip 22 can be prevented from loosening and causing the steel strand 40 to move. Furthermore, when the pressure-applying device 60 pulls the steel strand 40 for stretching and loading, the steel strand 40 drives the working clamp 22 to overcome the elastic force of the elastic member 23 and move. At the same time, the elastic pre-tightening force of the elastic member 23 pushes the working clamp 22 to move toward the inner conical surface of the working anchor cup 21 to achieve automatic clamping, thereby preventing the steel strand 40 from being pulled out in the opposite direction and avoiding loading failure.

[0038] like Figures 2 to 4 As shown, in one embodiment, the clip assembly 20 also includes an anchor cup end cover 24 connected to the working anchor cup 21, and one end of the elastic member 23 elastically pushes against the anchor cup end cover 24. The elastic member 23 is loaded into the load hole 211 and abuts against the large end of the working clip 22, and the anchor cup end cover 24 is fixed to the working anchor cup 21 and blocks the load hole 211 to confine the elastic member 23 in the working anchor cup 21. Among them, the anchor cup end cover 24 is provided with a through hole for the steel strand 40 to pass through. The anchor cup end cover 24 is detachably connected to the working anchor cup 21, such as the anchor cup end cover 24 is spirally connected to the working anchor cup 21 to form a spiral connection. Alternatively, the anchor cup end cover 24 is locked and connected to the working anchor cup 21 by a fastener to form a detachable connection.

[0039] Furthermore, the modular segment tensioning device further includes an unlocking assembly 30 mounted on the fixed base frame 10, and the unlocking assembly 30 movably pushes at least part of the working clip 22 to separate from the conical surface of the working anchor cup 21, so as to release the locking of the working clip 22 to the steel strand 40. The unlocking assembly 30 is arranged opposite to the working clip 22, so as to movably push the working clip 22 to move, so as to release the locking of the working clip 22 to the steel strand 40.

[0040] Specifically, the unlocking assembly 30 pushes the working clamps 22 to move axially along the load hole 211, thereby gradually increasing the gap between the working clamps 22, releasing the lock of the working clamps 22 on the steel strand 40, so that the steel strand 40 can be loosened and moved.

[0041] In one embodiment, the unlocking assembly 30 is installed on the locking seat 11 and is arranged back to back with the clamping piece assembly 20, and the steel strand 40 shuttles along the central hole of the unlocking assembly 30. The unlocking assembly 30 is fixed to the locking seat 11, which can shorten the overall structural size and reduce the amount of activity required for unlocking. Among them, the unlocking assembly 30 includes a top block 32 and an adjusting bolt 31, the top block 32 is slidably connected to the locking seat 11, the adjusting bolt 31 is spirally connected to the locking seat 11 and pushes the top block 32, and the working clamp 22 is located in the sliding direction of the top block 32. The locking seat 11 is provided with an unlocking hole, and the unlocking hole is coaxially arranged with the load hole 211. In addition, the aperture of the unlocking hole is larger than the aperture of the small hole of the load hole 211, and the aperture of the unlocking hole is larger than the axis of the steel strand 40.

[0042] The top block 32 slides in the unlocking hole, and an unlocking boss is provided at the end of the top block 32 . The unlocking boss can move axially under the push of the locking seat 11 , and push the working clamp 22 to move after being inserted into the load hole 211 , so as to release the lock of the working clamp 22 on the steel strand 40 .

[0043] The fixed base frame 10 is provided with a single-side fixing structure; or, the fixed base frame 10 is provided with a double-side fixing structure. In one embodiment, the fixed base frame 10 includes a bottom plate 13, two docking plates 12 and at least two reinforcing plates 14, and the two docking plates 12 are relatively fixed to the two ends of the bottom plate 13. The three sides of the reinforcing plate 14 are respectively fixedly connected to the reinforcing plate 14 and the bottom plate 13, and the three sides of the locking seat 11 are respectively fixedly connected to the two reinforcing plates 14 and the bottom plate 13, and the locking seat 11 and the docking plates 12 are arranged at intervals.

[0044] like Figures 1 to 5 As shown, the bottom plate 13 is used to fit to the tunnel segment, the butt plate 12 is distributed and fixed at both ends of the bottom plate 13, and two reinforcing plates 14 are arranged in parallel and located between the two butt plates 12. The butt plate 12 and the reinforcing plate 14 form a rectangular structure or a II-shaped structure, the reinforcing plate 14 is located in the enclosed space and intersects with the bottom plate 13, and the fixed base frame 10 thus forms a frame-shaped structure, and the overall structure has high stability and high structural strength. Preferably, the fixed base is a symmetrical structure so that it can be installed from both ends and the structure is stable.

[0045] Furthermore, the modular segment tensioning device further includes an extension frame 70 detachably connected to the fixed base frame 10, and the extension frame 70 is used to extend the connection position and connection length of the fixed base frame 10, so as to adapt to different connection requirements of the steel strands 40. For example, the extension frame 70 can be extended to the bolt hole of another segment, so that the modular segment tensioning device crosses and connects two bolt holes to improve the installation structure strength and connection stability. Alternatively, the extension frame 70 can extend the connection mode of the extension clip assembly 20 to achieve different fixing directions of the steel strands 40.

[0046] In a preferred embodiment, the extension frame 70 is equipped with a clip assembly 20, and the clip assembly 20 is used to lock the steel strand 40. The extension frame 70 is equipped with the clip assembly 20, and accordingly, the end of the fixed base frame 10 connected to the extension frame 70 does not need to be equipped with the clip assembly 20, thereby simplifying the structure and achieving the uniformity of the fixed base frame 10.

[0047] The extension frame 70 is fixed to the docking plate 12 , and the two are locked and connected by a bolt assembly, and the connection effect is good. Preferably, an assembly plate is provided at one end of the extension frame 70 , and the clip assembly 20 abuts against the assembly plate through the steel strand 40 .

[0048] During the tensioning process of the tunnel segment, two or more modular segment tensioning devices are arranged at intervals along the length direction of the tunnel. Each modular segment tensioning device is locked to the corresponding tunnel segment by a locking bolt 50 to form a positioning support. One end of the steel strand 40 is fixed to a modular segment tensioning device through a clip assembly 20, and the other end of the steel strand 40 passes through the clip assembly 20 of another modular segment tensioning device and is connected to a pressure device 60. The pressure device 60 pushes against the working anchor cup 21 and pulls the steel strand 40 to move and load. During the loading process, the working clip 22 is driven by the steel strand 40 to break away from the inner conical surface of the working anchor cup 21. After the loading is completed, the working clip 22 closes and presses against the inner conical surface of the working anchor cup 21 to perform abutment locking. Preferably, the elastic member 23 provides a locking force to the working clip 22 to prevent the working clip 22 from loosening.

[0049] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0050] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A modular segment tensioning device, characterized in that: include: A fixed base frame is provided with a locking seat; A clip assembly connected to the locking seat, the clip assembly comprising a working anchor cup and at least two working clips assembled in the working anchor cup, the mating surfaces of the working clip and the working anchor cup being conical surfaces, the at least two working clips being closed together to form a locking hole for clamping the steel strand, and the tensioning of the steel strand drives the conical surface of the working clip to press against the conical surface of the working anchor cup; The locking bolts are used to lock the fixed base frame to the tunnel segment.

2. The modular segment tensioning device according to claim 1, characterized in that: The locking hole has bite convex patterns at intervals on its wall, and the bite convex patterns are used to increase the bite force on the steel strand.

3. The modular segment tensioning device according to claim 1, characterized in that: The clip assembly further comprises an elastic member elastically abutting against the working clip, and the elastic member is used to apply an elastic pre-tightening force to the working clip to move in the direction of the conical surface.

4. The modular segment tensioning device according to claim 3, characterized in that: The clip assembly also includes an anchor cup end cover connected to the working anchor cup, and one end of the elastic member elastically pushes against the anchor cup end cover.

5. The modular segment tensioning device according to claim 1, characterized in that: It also includes an unlocking component installed on the fixed base frame, and the unlocking component movably pushes at least a part of the working clamp to separate from the conical surface of the working anchor cup to release the locking of the working clamp on the steel strand.

6. The modular segment tensioning device according to claim 5, characterized in that: The unlocking assembly is installed on the locking seat and is arranged back to back with the clip assembly, and the steel strand passes through the central hole of the unlocking assembly.

7. The modular segment tensioning device according to claim 6, characterized in that: The unlocking assembly includes a top block and an adjusting bolt, the top block is slidably connected to the locking seat, the adjusting bolt is spirally connected to the locking seat and pushes the top block, and the working clamp is located in the sliding direction of the top block.

8. The modular segment tensioning device according to claim 1, characterized in that: The fixed base frame is symmetrically arranged, and includes a base plate, two docking plates and at least two reinforcing plates. The two docking plates are relatively fixed at both ends of the base plate, and the three sides of the reinforcing plate are respectively fixedly connected to the reinforcing plate and the base plate. The three sides of the locking seat are respectively fixedly connected to the two reinforcing plates and the base plate, and the locking seat and the docking plates are spaced apart.

9. The modular segment tensioning device according to claim 1, characterized in that: It also includes an extension frame detachably connected to the fixed base frame, and the extension frame is equipped with a clip assembly, and the clip assembly is used to lock the steel strand.

10. The modular segment tensioning device according to claim 1, characterized in that: The locking bolt includes a stopper, a bolt portion protruding from the stopper at both ends respectively and a rotating portion, wherein the bolt portion is used to be spirally connected to the tunnel segment until the stopper, and the rotating portion is provided with a wire passing hole, and the steel strand passes through the wire passing hole.

Images