Hoop device and mounting method

Abstract

The invention relates to a hoop device and an installation method, the hoop device comprises a left hoop ring, a right hoop ring, a bottom connecting piece and a top locking piece, the left hoop ring and the right hoop ring each comprise a plurality of hoop joints distributed in an arc shape, and every two adjacent hoop joints are hinged through a detachable hinge; the bottoms of the left hoop ring and the right hoop ring are detachably connected through a bottom connecting piece; the top locking piece is arranged between the top of the left hoop and the top of the right hoop and used for adjusting the distance between the top of the left hoop and the top of the right hoop. The device is reasonable in design, high-precision wrapping of large-diameter irregular wood components can be achieved, and the problems that a traditional clamp and a traditional hose clamp are poor in adjustability and cannot be matched with irregular large-section wood components are solved; meanwhile, the circumferential bearing capacity is improved, and the problem that the pre-tightening force of a traditional clamp and a traditional hose clamp is low is solved; and due to the modular design, machining, mounting and dismounting are convenient and fast.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering, and in particular relates to a hoop device and an installation method. Background Art

[0002] Wooden arch bridges are outstanding examples of ancient Chinese architectural engineering. Their woven timber arch foot joints carry the core function of transmitting the entire bridge load to the abutments. In traditional construction systems, arch foot joints typically utilize a three-section dovetail joint structure with the ends of the diagonal joints interlocking with the abutments to create a stable system. However, this type of arch foot is prone to stress concentration and cracking under heavy loads. Furthermore, wooden arch bridge components are characterized by large diameters (i.e., large cross-sections). These diameters not only vary widely from one member to another, but also exhibit irregular cross-sections, lacking uniform geometry and imposing high load-bearing capacity requirements. Traditionally, hose clamps or clamps have been used to prevent this type of damage. However, hose clamps have a small cross-section, limited adjustability, and cannot provide sufficient preload. Clamps, on the other hand, struggle to adapt to the inconsistent and uneven geometry of the cross-sections. Therefore, improvements to these issues are urgently needed. Summary of the invention

[0003] The present invention aims to improve the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a hoop device and an installation method.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hoop device, including a left hoop, a right hoop, a bottom connecting piece and a top locking piece, the left hoop and the right hoop each include a plurality of hoop segments distributed in an arc shape, and adjacent hoop segments are hingedly connected by a detachable hinge; the bottoms of the left hoop and the right hoop are detachably connected by the bottom connecting piece; the top locking piece is arranged between the tops of the left hoop and the right hoop, and is used to adjust the distance between the tops of the left hoop and the right hoop.

[0005] Furthermore, the top locking piece includes a bidirectional bolt and two connecting blocks, the bidirectional bolt is provided with two threaded segments distributed on the left and right and with opposite thread rotation directions; the two connecting blocks are hinged to the hoop section at the top of the left hoop ring and the hoop section at the top of the right hoop ring, respectively, and a connecting screw hole is provided in the middle part of the top end of each connecting block, which passes through in the left and right directions. The thread rotation directions of the connecting screw holes of the two connecting blocks are opposite, and they are threadedly connected to the two threaded segments, respectively.

[0006] Furthermore, the connecting screw hole is formed by being recessed downward from the top surface of the connecting block, and the connecting screw hole is crescent-shaped.

[0007] Furthermore, receiving grooves are provided on the top surfaces of the hoop joints at the top of the left hoop ring and the top surfaces of the hoop joints at the top of the right hoop ring. The lower end of the connecting block extends into the receiving groove on the same side. The lower end of the connecting block is hinged to the front and rear side walls of the receiving groove via a hinge shaft. The connecting block rotates left and right in the receiving groove driven by the double-headed bolt.

[0008] Furthermore, the top locking member further includes a housing covering the outside of the two connecting blocks. Card slots are provided at the bottoms of the left and right ends of the housing. The card slots at the bottoms of the left and right ends of the housing are used to be respectively clamped on the outside of the hoop joints at the top of the left hoop ring and the hoop joints at the top of the right hoop ring. A through hole is provided at the left end of the housing to facilitate the penetration of the double-headed bolt. A support for installing the end of the double-headed bolt is provided at the right end of the housing.

[0009] Furthermore, a shear-resistant mating portion is provided between the hoop joint at the top of the left hoop ring and the hoop joint at the top of the right hoop ring. The shear-resistant mating portion includes a plugging convex portion provided on the right end face of the hoop joint at the top of the left hoop ring and a plugging groove provided on the left end face of the hoop joint at the top of the right hoop ring. Two rows of dovetail-shaped protrusions distributed front and rear are provided on the top surface of the plugging convex portion. Each row of dovetail-shaped protrusions is distributed in the left-right direction; two dovetail grooves distributed front and rear are provided on the inner top surface of the plugging groove. The two dovetail grooves correspond to the positions of the two rows of dovetail-shaped protrusions. The dovetail grooves extend in the left-right direction to facilitate the embedding of the dovetail-shaped protrusions.

[0010] Furthermore, a rubber layer is provided on the bottom surface of the plugging convex portion.

[0011] Furthermore, the bottom connecting member includes a bottom plate located below and between the bottoms of the left hoop ring and the right hoop ring. Vertical side plates are detachably connected to the front and rear ends of the bottom plate respectively. A pair of connecting columns distributed left and right are provided between the vertical side plates at the front and rear ends of the bottom plate; connecting through holes are provided at the right end of the hoop joint at the bottom of the left hoop ring and the left end of the hoop joint at the bottom of the right hoop ring. The axes of the connecting through holes extend in the front-rear direction. The pair of connecting columns respectively pass through the connecting through holes on the hoop joint at the bottom of the left hoop ring and the connecting through holes on the hoop joint at the bottom of the right hoop ring movably to form a hinge.

[0012] Furthermore, an articulated mating portion is provided between adjacent two hoop joints. The articulated mating portion includes a U-shaped articulated recess and an articulated convex portion extending into the inside of the articulated recess. The articulated recess is provided on one of the hoop joints, and the articulated convex portion is provided on the other hoop joint. Articulated through holes are coaxially provided on the front and rear side walls of the articulated recess and the articulated convex portion; the detachable hinge includes an articulated pin shaft passing through the articulated through hole, and a nut is screwed at the end of the articulated pin shaft.

[0013] Another technical solution adopted by the present invention is: an installation method of a hoop device, comprising the following steps: (1) Disassemble the vertical side plate of the bottom connector to separate the bottom of the left hoop from the bottom connector; (2) Fix the top locking member at a predetermined position on the bottom of the wooden arch bridge; (3) Align the connection through holes on the hoop sections at the bottom of the left hoop and the connection through holes on the hoop sections at the bottom of the right hoop with a pair of connection columns of the bottom connector, and reinstall the vertical side plate of the bottom connector; (4) Insert the insertion convex part on the hoop section at the top of the left hoop into the insertion groove on the hoop section at the top of the right hoop to form an engaged state between the insertion convex part and the insertion groove; (5) Rotate the bidirectional bolt to drive the two connection blocks to rotate towards each other through the connection screw holes. When the two connection blocks rotate towards each other, they drive the hoop sections at the top of the left hoop and the hoop sections at the top of the right hoop to displace towards each other until the meshing depth of the connection screw hole and the threaded section on the bidirectional bolt is appropriate to achieve the effect of thread self-locking, and complete the circumferential locking of the arch foot; (6) If the tightness needs to be adjusted, rotate the bidirectional bolt in the reverse direction to release the self-locking, and lock it again after the position is adjusted.

[0014] Compared with the prior art, the present invention has the following effects: The present invention is reasonably designed, can achieve high-precision wrapping of large-diameter and irregular wooden members, solve the problems of poor adjustability of traditional clamps and hose clamps and inability to adapt to non-regular large-section wooden members; at the same time, it improves the circumferential bearing capacity and solves the problem of low pre-tightening force of traditional clamps and hose clamps; modular design makes processing, installation and disassembly convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 is an exploded state schematic diagram of the left and right hoops in an embodiment of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the top locking member in an embodiment of the present invention; Figure 4 is a schematic diagram of the cooperation between the top locking member and the hoop sections at the top of the left and right hoops in an embodiment of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the connection block in an embodiment of the present invention; Figure 6 is a structural schematic diagram of the hoop section at the top of the left hoop in an embodiment of the present invention; Figure 7 is a structural schematic diagram of the hoop section at the top of the right hoop in an embodiment of the present invention; Figure 8 is a three-dimensional structural schematic diagram of the outer shell in the top locking member in an embodiment of the present invention; Figure 9 is a three-dimensional structural schematic diagram of the hoop section in an embodiment of the present invention; Figure 10It is a schematic three-dimensional structure diagram of the bottom connector in the embodiment of the present invention; Figure 11 It is a schematic diagram showing the cooperation of the bottom connector with the hoop joints at the bottoms of the left and right hoop rings in the embodiment of the present invention; Figure 12 It is a schematic diagram of the structure of the hoop joints at the bottoms of the left and right hoop rings in the embodiment of the present invention; Figure 13 It is a schematic exploded structure diagram of the detachable hinge in the embodiment of the present invention; Figure 14 It is a schematic installation diagram in the embodiment of the present invention.

[0016] In the figure: 1 - left hoop ring; 2 - right hoop ring; 3 - bottom connector; 4 - top locking member; 5 - hoop joint; 6 - detachable hinge; 301 - bottom plate; 302 - vertical side plate; 303 - connecting column; 401 - bi-directional bolt; 402 - connecting block; 403 - threaded section; 404 - hole part; 405 - connecting screw hole; 406 - outer shell; 407 - card slot; 408 - through hole; 409 - support; 501 - hoop joint at the top of the left hoop ring; 502 - hoop joint at the top of the right hoop ring; 503 - accommodating groove; 504 - inserting convex part; 505 - inserting groove; 506 - dovetail-shaped protrusion; 507 - dovetail groove; 508 - rubber layer; 509 - hoop joint at the bottom of the left hoop ring; 510 - hoop joint at the bottom of the right hoop ring; 511 - connecting through hole; 512 - hinged concave part; 513 - hinged convex part; 514 - hinged through hole; 601 - hinged pin shaft; 602 - nut; 7 - half-span wooden arch bridge and abutment; 8 - three-section inclined seedlings; 9 - hoop device. Specific embodiments

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0019] As Figures 1 to 14As shown in the figure, a hoop device of the present invention is applicable to fastening the arch feet of a wooden arch bridge, and includes a left hoop 1, a right hoop 2, a bottom connecting member 3, and a top locking member 4. The left hoop and the right hoop are both arc-shaped as a whole and are distributed facing each other left and right. The left hoop 1 and the right hoop 2 each include a plurality of hoop segments 5 distributed in an arc shape, and adjacent hoop segments 5 are hinged to each other through a detachable hinge 6; the bottoms of the left hoop 1 and the right hoop 2 are detachably connected through a bottom connecting member 3; the top locking member 4 is arranged between the tops of the left hoop 1 and the right hoop 2 for adjusting the distance between the tops of the left hoop 1 and the right hoop 2.

[0020] In this embodiment, the top locking member 4 includes a bidirectional bolt 401 arranged in the left-right direction and two connecting blocks 402 distributed left and right. The bidirectional bolt 401 is provided with two threaded segments 403 distributed left and right, and the thread directions of the two threaded segments 403 are opposite; the two connecting blocks 402 are respectively hinged to the hoop segment 501 at the top of the left hoop and the hoop segment 502 at the top of the right hoop. Specifically: a receiving groove 503 is provided on the top surface of the hoop segment 501 at the top of the left hoop and the top surface of the hoop segment 502 at the top of the right hoop. The lower end of the connecting block 402 extends into the receiving groove 503 on the same side. A hole portion 404 is opened at the lower end of the connecting block 402, and the hole portion 404 is hinged to the front and rear side walls of the receiving groove 503 through a hinge shaft. Further, a connecting screw hole 405 penetrating in the left-right direction is opened in the middle of the top end of each connecting block 402. The connecting screw hole 405 is recessed downward from the top surface of the connecting block 402. The overall shape of the connecting screw hole 405 is crescent-shaped (i.e., arc-shaped). The thread directions of the connecting screw holes 405 of the two connecting blocks 402 are opposite and are respectively threadedly connected to the two threaded segments 403 of the bidirectional bolt 401. The two connecting blocks rotate left and right in the receiving groove under the drive of the bidirectional bolt.

[0021] When the top locking member is in use: Rotate the bidirectional bolt 401 to drive the two connecting blocks 402 to rotate towards each other through the connecting screw holes 405, so that the connecting blocks 402 contact the side walls of the receiving groove 503. As the two connecting blocks 402 continue to rotate towards each other, at this time, the hoop segment 501 at the top of the left hoop and the hoop segment 502 at the top of the right hoop are driven to displace towards each other until the meshing depth between the connecting screw hole 405 and the threaded segment 403 on the bidirectional bolt 401 is appropriate, achieving a tight bite and reaching the thread self-locking effect to complete the circumferential locking of the arch foot; if the tightness needs to be adjusted, rotate the bidirectional bolt in the reverse direction to release the self-locking, and lock it again after the position is adjusted. It should be noted that the overall shape of the connecting screw hole is crescent-shaped (i.e., arc-shaped). In the initial state, the meshing position between the threaded segment on the bidirectional bolt and the connecting screw hole is small and the meshing depth is small. As the bidirectional bolt rotates, the meshing position between the threaded segment on the bidirectional bolt and the connecting screw hole gradually increases, and the meshing depth also gradually deepens. When the meshing depth is appropriate and a tight bite is achieved, the self-locking effect can be achieved through the thread force at this time.

[0022] In this embodiment, the top locking member 4 further includes a housing 406 covering the outside of the two connecting blocks 402. At the bottom of the left and right ends of the housing 406, there are card slots 407 respectively. The card slots at the bottom of the left and right ends of the housing 406 are used to be respectively clamped on the outside of the hoop joints 501 at the top of the left hoop and the hoop joints 502 at the top of the right hoop. Further, a through hole 408 is provided at the left end of the housing 406 to facilitate the penetration of the two-way bolt 401, and a support 409 for installing the end of the two-way bolt 401 is provided at the right end of the housing 406. The through hole 408 and the support 409 support and install the two-way bolt 401. That is, the two connecting blocks 402 both move inside the housing 406, and a closed force transmission path is formed inside the housing to ensure uniform distribution of the circumferential pressure of the locking ring.

[0023] In this embodiment, a shear-resistant cooperation part is provided between the hoop joint 501 at the top of the left hoop and the hoop joint 502 at the top of the right hoop. The shear-resistant cooperation part includes a plug-in convex part 504 provided on the right end face of the hoop joint 501 at the top of the left hoop and a plug-in groove 505 provided on the left end face of the hoop joint 502 at the top of the right hoop. The plug-in convex part is used to be embedded into the plug-in groove to form a shear-resistant cross-section. Further, two rows of dovetail-shaped protrusions 506 distributed front and back are provided on the top surface of the plug-in convex part 504, and each row of dovetail-shaped protrusions 506 is evenly spaced in the left-right direction; two dovetail grooves 507 distributed front and back are provided on the inner top surface of the plug-in groove 505, and the two dovetail grooves 507 correspond to the positions of the two rows of dovetail-shaped protrusions 506. The dovetail grooves 507 extend in the left-right direction to facilitate the embedding of the dovetail-shaped protrusions 506. By the engagement of the dovetail-shaped protrusions and the dovetail grooves, a complementary meshing structure is formed, and the adjustment range can reach more than 3 times the length of a single hoop joint.

[0024] In this embodiment, a rubber layer 508 is provided on the bottom surface of the plug-in convex part 504 to achieve elastic buffering.

[0025] In this embodiment, the bottom connecting member 3 includes a bottom plate 301 positioned below and between the bottoms of the left hoop 1 and the right hoop 2. The front and rear ends of the bottom plate 301 are respectively detachably connected with vertical side plates 302. Specifically: a trapezoidal groove is provided on the upper surface of the bottom plate 301, and a corresponding trapezoidal protrusion is provided at the lower end of the surface of the vertical side plate. The trapezoidal protrusion is in snap-fit with the trapezoidal groove, but the trapezoidal protrusion does not penetrate through the trapezoidal groove. A pair of connecting columns 303 distributed left and right are arranged between the vertical side plates 302 at the front and rear ends of the bottom plate 301. The axis of the connecting column is arranged in the front-rear direction; a connecting through hole 511 is provided at the right end of the hoop section 509 at the bottom of the left hoop and at the left end of the hoop section 510 at the bottom of the right hoop. The axis of the connecting through hole 511 is in the front-rear direction. The pair of connecting columns 303 respectively pass through the connecting through holes 511 on the hoop section 509 at the bottom of the left hoop and the connecting through holes 511 on the hoop section 510 at the bottom of the right hoop movably to form a hinge. During use, the vertical side plates of the bottom connecting member are disassembled to separate the bottom of the left hoop from the bottom connecting member; the top locking member is fixed at a predetermined position at the bottom of the wooden arch bridge arch; the connecting through holes on the hoop sections at the bottom of the left hoop and the connecting through holes on the hoop sections at the bottom of the right hoop are aligned with the pair of connecting columns of the bottom connecting member, and the vertical side plates of the bottom connecting member are reinstalled.

[0026] In this embodiment, there is a hinge fitting part between two adjacent hoop sections 5. The hinge fitting part includes a U-shaped hinge concave part 512 and a hinge convex part 513 extending into the inner side of the hinge concave part 512. The hinge concave part 512 is arranged on one of the hoop sections, and the hinge convex part 513 is arranged on the other hoop section (that is, except for the top and bottom hoop sections, one end of each hoop section has a hinge concave part and the other end has a hinge convex part). Hinge through holes 514 are coaxially provided on the front and rear side walls of the hinge concave part 512 and the hinge convex part 513; the detachable hinge 6 includes a hinge pin 601 passing through the hinge through holes 514, and a nut 602 is screwed at the end of the hinge pin 601. The detachable hinge is formed by the hinge pin and the nut, which is convenient for installation and disassembly. During use, the number of hoop sections can be increased as needed to adapt to arch foot members with different diameters.

[0027] In this embodiment, precision scale lines are provided on the body of the bi-directional bolt 401.

[0028] In this embodiment, in this hoop device, the left hoop and the right hoop can be made of engineering materials such as carbon structural steel, low-alloy high-strength structural steel, high-strength steel, and aluminum alloy.

[0029] In this embodiment, the installation method of the hoop device includes the following steps: (1) Disassemble the vertical side plate 302 of the bottom connector 3 to separate the bottom of the left hoop 1 from the bottom connector 3; (2) Fix the top locking member 4 at a predetermined position on the bottom of the wooden arch bridge arch; (3) Align the connection through holes 511 on the hoop section 509 at the bottom of the left hoop and the connection through holes 511 on the hoop section 510 at the bottom of the right hoop with a pair of connection columns 303 of the bottom connector 3, and reinstall the vertical side plate 302 of the bottom connector 3; (4) Insert the plugging convex part 504 on the hoop section 501 at the top of the left hoop into the plugging groove 505 on the hoop section 502 at the top of the right hoop to make the plugging convex part 504 and the plugging groove 505 form an engaged state; (5) Rotate the bidirectional bolt 401 to drive the two connection blocks 402 to rotate towards each other through the connection screw hole 405. When the two connection blocks 402 rotate towards each other, they drive the hoop section 501 at the top of the left hoop and the hoop section 502 at the top of the right hoop to displace towards each other until the meshing depth of the connection screw hole 405 and the threaded section on the bidirectional bolt 401 is appropriate to achieve the effect of thread self-locking and complete the circumferential locking of the arch foot; (6) If the tightness needs to be adjusted, reverse-rotate the bidirectional bolt to release the self-locking, and lock it again after the position is adjusted.

[0030] During actual construction, to meet the high load-bearing requirements and structural reliability requirements of the arch foot of the wooden arch bridge, several such hoop devices can be installed at intervals along the length direction of the arch foot. Through the coordinated action of multiple hoops, the overall bearing capacity and structural reliability of the components can be significantly enhanced, and at the same time, the continuous splitting failure phenomenon of the wood caused by local stress concentration can be effectively inhibited. During the installation process, the adjustment should be controlled by torque until the tightening force reaches the design requirements.

[0031] The advantages of the present invention are as follows: By increasing or decreasing the hoop sections and the meshing structure of the dovetail-shaped protrusions and dovetail grooves (the adjustment range reaches more than 3 times the length of a single hoop section), high-precision wrapping of large-diameter and irregular wooden components is achieved, solving the problems of poor adjustability of traditional clamps and hose clamps and their inability to adapt to non-regular large-section wooden components; By using this hoop to improve the circumferential bearing capacity, the problem of low pre-tightening force of traditional clamps and hose clamps is solved, so that the circumferential bearing capacity meets the design requirements; The pre-tightening force is adjusted in cooperation with the bidirectional bolt and the thread self-locking is used to prevent loosening, forming a locking system with a certain pre-tightening force; The modular design makes the processing, installation and disassembly convenient and fast. The construction and installation are time-saving and labor-saving, and the maintenance and replacement are safe and flexible. It can be extended and applied to the circumferential locking scenarios of large wooden component repair and other large-size non-regular civil engineering structures or pipe cables.

[0032] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as connection using bolts or screws), or can also be understood as: a non-detachable fixed connection (such as riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (such as manufactured by integral forming using casting technology) (except where it is clearly impossible to use the integral forming process).

[0033] In addition, unless otherwise stated, the terms used to represent positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close thereto.

[0034] Any component provided by the present invention can either be assembled from a plurality of separate components or be a single component manufactured by an integral forming process.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A hoop device, characterized in that: It includes a left hoop, a right hoop, a bottom connecting piece and a top locking piece. Both the left hoop and the right hoop include multiple hoop sections distributed in an arc shape, and adjacent hoop sections are hinged to each other through detachable hinges; the bottoms of the left hoop and the right hoop are detachably connected through the bottom connecting piece; the top locking piece is arranged between the tops of the left hoop and the right hoop and is used to adjust the distance between the tops of the left hoop and the right hoop.

2. The hoop device according to claim 1, wherein: The top locking piece includes a bidirectional bolt and two connecting blocks. The bidirectional bolt is provided with two threaded sections distributed left and right and having opposite thread directions; the two connecting blocks are respectively hinged to the hoop sections at the top of the left hoop and the hoop sections at the top of the right hoop. A connecting screw hole penetrating in the left-right direction is opened in the middle of the top end of each connecting block, and the thread directions of the connecting screw holes of the two connecting blocks are opposite and are respectively threadedly connected to the two threaded sections.

3. The hoop device according to claim 2, characterized in that: The connecting screw hole is formed by recessing downward from the top surface of the connecting block, and the connecting screw hole is crescent-shaped.

4. A hoop device according to claim 2, wherein: The top surfaces of the hoop sections at the top of the left hoop and the top surfaces of the hoop sections at the top of the right hoop are both provided with accommodation grooves. The lower ends of the connecting blocks extend into the accommodation grooves on the same side. The lower ends of the connecting blocks are hinged to the front and rear side walls of the accommodation grooves through hinge shafts, and the connecting blocks rotate left and right in the accommodation grooves under the drive of the bidirectional bolt.

5. The hoop device according to claim 2, characterized in that: The top locking piece further includes a housing covering the outside of the two connecting blocks. Card slots are provided at the bottoms of the left and right ends of the housing, and the card slots at the bottoms of the left and right ends of the housing are used to be respectively clamped on the outside of the hoop sections at the top of the left hoop and the hoop sections at the top of the right hoop. A through hole is opened at the left end of the housing to facilitate the penetration of the bidirectional bolt, and a support for installing the end of the bidirectional bolt is provided at the right end of the housing.

6. The hoop device according to claim 1, wherein: A shear-resistant matching part is provided between the hoop section at the top of the left hoop and the hoop section at the top of the right hoop. The shear-resistant matching part includes a plugging convex part arranged on the right end face of the hoop section at the top of the left hoop and a plugging groove arranged on the left end face of the hoop section at the top of the right hoop. Two rows of dovetail-shaped protrusions distributed front and rear are provided on the top surface of the plugging convex part, and each row of dovetail-shaped protrusions is distributed in the left-right direction; two dovetail grooves distributed front and rear are provided on the inner top surface of the plugging groove, and the two dovetail grooves correspond to the positions of the two rows of dovetail-shaped protrusions. The dovetail grooves extend in the left-right direction to facilitate the embedding of the dovetail-shaped protrusions.

7. A hoop device according to claim 6, characterized in that: A rubber layer is provided on the bottom surface of the plugging convex part.

8. The hoop device according to claim 1, wherein: The bottom connecting piece includes a bottom plate located below the bottoms of the left hoop and the right hoop. Vertical side plates are respectively detachably connected to the front and rear ends of the bottom plate. A pair of connecting columns distributed left and right are arranged between the vertical side plates at the front and rear ends of the bottom plate; connecting through holes are opened at the right end of the hoop section at the bottom of the left hoop and the left end of the hoop section at the bottom of the right hoop, and the axes of the connecting through holes are in the front-rear direction. A pair of connecting columns respectively pass through the connecting through holes on the hoop section at the bottom of the left hoop and the connecting through holes on the hoop section at the bottom of the right hoop movably to form a hinge.

9. The hoop device according to claim 1, wherein: There is a hinge fitting portion between two adjacent hoop joints. The hinge fitting portion includes a U-shaped hinge recess and a hinge protrusion extending into the inner side of the hinge recess. The hinge recess is provided on one of the hoop joints, and the hinge protrusion is provided on the other hoop joint. The front and rear side walls of the hinge recess and the hinge protrusion are coaxially provided with hinge through holes. The detachable hinge includes a hinge pin passing through the hinge through holes, and a nut is screwed at the end of the hinge pin.

10. A method for installing a hoop device as described in any one of claims 1 to 9, characterized in that: The steps include: (1) disassembling the vertical side plate of the bottom connector to separate the bottom of the left hoop ring from the bottom connector; (2) fixing the top locking member at a predetermined position at the bottom of the wooden arch bridge arcade; (3) aligning the connection through holes on the hoop joints at the bottom of the left hoop ring and the connection through holes on the hoop joints at the bottom of the right hoop ring with a pair of connection columns of the bottom connector, and reinstalling the vertical side plate of the bottom connector; (4) embedding the insertion protrusion on the hoop joint at the top of the left hoop ring into the insertion groove on the hoop joint at the top of the right hoop ring to form an engaged state between the insertion protrusion and the insertion groove; (5) rotating the bidirectional bolt to drive the two connection blocks to rotate towards each other through the connection screw holes. When the two connection blocks rotate towards each other, they drive the hoop joints at the top of the left hoop ring and the hoop joints at the top of the right hoop ring to displace towards each other until the meshing depth of the connection screw holes and the threaded section on the bidirectional bolt is appropriate to achieve the effect of thread self-locking and complete the circumferential locking of the arch foot; (6) if the tightness needs to be adjusted, rotate the bidirectional bolt in the reverse direction to release the self-locking, and lock it again after the position is adjusted.

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