A high speed deck joint reinforcement mesh connector

Abstract

The application discloses a high-speed bridge deck anti-crack steel bar welded mesh connector, which comprises a connecting sleeve and an inner cavity; a locking sleeve is composed of a first limiting tile and a second limiting tile which are mutually engaged; the first limiting tile and the second limiting tile are externally provided with a wrapping spring; a steel bar end is inserted into the locking sleeve to limit the steel bar end; a top spring is arranged between the locking sleeve and the bottom end of the inner cavity; an open outer end is screw-connected with a jacking nut; when the jacking nut is screwed into the inner cavity, the first conical surface and the second conical surface extrude and fix the locking sleeve from both sides; a conical convex ring is arranged on the outer wall of the middle part of the locking sleeve; the conical convex ring has a conical slope surface which is in the same direction with the second conical surface; the inner cavity is provided with a clamping ring wall; the clamping ring wall cooperates with the conical convex ring to clamp the middle part of the locking sleeve. The connector is fast and convenient for steel bar connection; the steel bar end is inserted into the connecting sleeve and is clamped by the locking sleeve, which effectively prevents the steel bar from being pulled out, thereby increasing the tensile strength after the connection of the two steel bar ends.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel bar welded mesh, in particular to a high-speed bridge deck anti-cracking steel bar welded mesh connector. BACKGROUND

[0002] The steel bar welded mesh is a mesh in which longitudinal steel bars and transverse steel bars are arranged at a certain interval and are perpendicular to each other, and all intersection points are welded together. The steel bar welded mesh can significantly improve the engineering quality. The traditional bound steel bar is bound at the intersection point, which is easy to deform and slide, so that it cannot transmit force along the "cross" shape, the stress is uneven, and a single steel bar is easy to break and also easy to affect the gripping force of the steel bar and the concrete. The anchoring effect of the steel bar welded mesh and the concrete makes it difficult to be damaged, and can better withstand tensile force and shear force. The close interval also improves the anti-cracking performance of the concrete slab. Compared with the manually bound steel bar, the steel bar welded mesh reduces the installation time on the construction site. The steel bar welded mesh has good economic benefits. After the steel bar welded mesh is manufactured, it does not need to be processed and does not produce steel bar waste.

[0003] Generally, when a reinforced concrete structure is constructed to enhance the strength of a cement structure, the steel bars are used in a manner of being embedded in the cement. In particular, in large buildings, special structures, and engineering buildings such as bridges of expressways, a steel bar welded mesh is largely used to enhance the strength of a bridge deck.

[0004] However, since the steel bars are manufactured to have a standardized prescribed length, when the steel bar welded mesh having the standardized prescribed length is used in large buildings, special structures, and engineering buildings such as bridges, the end portions of the steel bars manufactured as the steel bar welded mesh of the limited length need to be connected to each other.

[0005] Methods generally used to connect the steel bars include lapping, welding, thread processing connection, mechanical connection, and the like.

[0006] The lapping is a method of connecting the steel bars by overlapping the steel bars of a prescribed length and binding the steel bars with a wire or a steel wire. However, this connection method causes a large amount of steel bars to be wasted, and the steel bars are easy to be separated due to the weak strength of the steel bar joint. Also, an increase in working time due to poor workability is a problem. The problem of the welding is that it is difficult to work, and since heat is generated when the welded portion is heated, the strength of the portion of the steel bar close to the welded point is significantly weakened. This easily causes cracks to occur in the ground of the steel bar welded mesh connection portion of the bridge deck after a long use of the bridge deck, and thus affects the quality of the bridge deck.

[0007] The prior art application No. CN202110419187.9 discloses a kind of corrosion-resistant anti-seismic anti-cracking steel mesh, two steel bars welded mesh are inserted into the fixed groove of another end steel bar by the fixed disc arranged at the end of steel bar, to realize the connection of steel bars welded mesh, but this mechanical connection mode is only point-to-point connection at the end of steel bar, and the radial bearing capacity of steel bar is poor, which still easily leads to crack on bridge deck.

[0008] In view of the above, it is necessary to propose a kind of high-speed bridge deck anti-cracking steel bar welded mesh connector to solve the above problems. SUMMARY

[0009] The purpose of the present application is to solve the above technical problems, and provide a kind of high-speed bridge deck anti-cracking steel bar welded mesh connector.

[0010] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a kind of high-speed bridge deck anti-cracking steel bar welded mesh connector, the connector includes a connecting sleeve, the connecting sleeve has an inner cavity, one end of the inner cavity is an open outer end, and the steel bar of the steel bar welded mesh is inserted into the inner cavity from the open outer end;

[0011] A locking sleeve movable along its axis is arranged in the inner cavity, the locking sleeve is composed of a first limiting tile and a second limiting tile intermeshing with each other, the first limiting tile and the second limiting tile are externally sleeved with a wrapping spring, the end of the steel bar is inserted into the locking sleeve to limit it, and a top spring is arranged between the locking sleeve and the bottom end of the inner cavity;

[0012] The open outer end is screwed with a jacking nut, the jacking nut is provided with a through hole through which the steel bar passes along the axial direction, the through hole is provided with a first conical surface on the inner wall of one end in the inner cavity, the bottom of the inner cavity is provided with a second conical surface, the slope directions of the first conical surface and the second conical surface are opposite, and when the jacking nut is screwed into the inner cavity, the first conical surface and the second conical surface squeeze and fix the locking sleeve from both sides;

[0013] The outer wall of the middle part of the locking sleeve is provided with a conical protruding ring, the conical protruding ring has a conical slope surface in the same direction as the second conical surface, and the inner cavity is provided with a clamping ring wall, which cooperates with the conical protruding ring to clamp the middle part of the locking sleeve.

[0014] Further, the intermeshing protrusions and grooves are arranged at the splicing surface of the first limiting tile and the second limiting tile, and the protrusions and grooves are in rectangular structure; when the end of the steel bar is inserted into the locking sleeve, the first limiting tile and the second limiting tile are expanded and separated from the splicing surface.

[0015] Further, the locking sleeve is provided with a ring groove on both sides of the conical protruding ring, and the wrapping spring is provided with two ring grooves.

[0016] Further, the inner wall of the locking sleeve is provided with a first ratchet ring, and the end of the steel bar is provided with a second ratchet ring, the first ratchet ring and the second ratchet ring have the same processing specification and opposite directions, and the steel bar is inserted into the locking sleeve to limit the pulling out of the steel bar by the ratchet.

[0017] Further, the inner cavity and the locking sleeve are provided with an expansion gap, and the expansion gap is not less than the expansion amount of the first limiting tile and the second limiting tile when the end of the steel bar is inserted into the locking sleeve.

[0018] Further, the connector is in a one-word type connection, and the two connectors are provided with open outer ends away from each other, and the two ends are connected to the steel bar welded steel bar end.

[0019] Further, the connector is in a T-shaped connection, and a third connector is vertically arranged on the side of the one-word type connection structure to form a T-shaped central structure of the three steel bar connections.

[0020] Further, it also includes a connecting framework, the connecting framework includes a connecting longitudinal rib, and a plurality of connectors are vertically arranged on both sides of the connecting longitudinal rib, and the two side connectors are arranged in alignment or staggered.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1. The connector is fast and convenient for steel bar connection, the end of the steel bar is inserted into the connecting sleeve and is clamped by the locking sleeve, which effectively prevents the steel bar from being pulled out, thereby increasing the tensile strength of the two steel bar connections.

[0023] 2. The locking sleeve is pushed and moved to the bottom of the inner cavity by the jacking screw, and the two sides are conical surfaces, which also apply a radial inward extrusion force to the locking sleeve during the jacking process, thereby improving the clamping and fixing effect of the locking sleeve on the steel bar.

[0024] 3. The middle part of the locking sleeve is provided with a conical protruding ring, and the steel bar inserted into the connector has a certain length, which is better fixed relative to the point, and the middle part of the inserted steel bar is clamped by the conical protruding ring, thereby increasing the clamping and fixing points and effectively improving the effect of the two steel bar connections.

[0025] 4. The connector can form various connection structures, is flexible to use, and avoids the disadvantage of reducing the strength of the steel bar near the welding point caused by welding. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is an exploded view of the high-speed bridge anti-cracking steel bar welded mesh connector of the present application;

[0027] Figure 2 It is a structural diagram of the locking sleeve of the present application;

[0028] Figure 3 A cross-sectional view of the anti-cracking steel bar welded mesh connector for a high-speed bridge deck according to the present invention;

[0029] Figure 4 This is a schematic diagram of a straight-line connection of the connector of the present invention;

[0030] Figure 5 Schematic diagram of the T-shaped connection of the connector of the present invention;

[0031] Figure 6 This is a schematic diagram of the connection of the present invention when used in connection with a steel mesh;

[0032] In the figure: 1. Connecting sleeve; 2. Inner cavity; 3. Locking sleeve; 4. First limiting tile; 5. Second limiting tile; 6. Tightening spring; 7. Top spring; 8. Tightening screw sleeve; 9. Through hole; 10. First conical surface; 11. Second conical surface; 12. Conical convex ring; 13. Tightening ring wall; 14. Convex teeth; 15. Grooves; 16. Ring grooves; 17. First ratchet ring; 18. Second ratchet ring; 19. Expansion gap; 20. Connecting skeleton; 21. Connecting longitudinal reinforcement. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1:

[0035] A high-speed bridge deck anti-crack steel welded mesh connector, such as Figure 1 As shown, the connector includes a connecting sleeve 1, which has an inner cavity 2, one end of the inner cavity 2 is an open outer end, and the steel bars of the steel welded mesh are inserted into the inner cavity 2 from the open outer end; a locking sleeve 3 that can move along its axis is provided in the inner cavity 2, and the inner cavity 2 is the installation cavity of the locking sleeve 3. In actual use, the end of the steel bar is inserted into the locking sleeve 3 in the inner cavity 2. When the end of the steel bar is inserted into the locking sleeve 3, the first limiting tile 4 and the second limiting tile 5 are expanded and separated from the splicing surface. When the steel bar is inserted into the locking position, the first limiting tile 4 and the second limiting tile 5 will approach each other to form a buckle; an expansion gap 19 is provided between the inner cavity 2 and the locking sleeve 3, and the expansion gap 19 is not less than the expansion amount of the first limiting tile 4 and the second limiting tile 5 when the end of the steel bar is inserted into the locking sleeve 3. In actual use, the locking sleeve 3 uses the space provided by the expansion gap 19 in the inner cavity 2 to expand and separate for the insertion of the end of the steel bar.

[0036] like Figure 2As shown, the locking sleeve 3 is composed of the first limiting tile 4 and the second limiting tile 5 which are engaged with each other, the locking sleeve 3 is a circular tube structure, and is divided into two limiting tiles along the diameter, and if the sectioning surface is only arranged as a plane, the two limiting tiles are prone to axial displacement and dislocation, thereby reducing the fixing effect on the end of the steel bar. To solve this problem, in the embodiment, the splicing surface of the first limiting tile 4 and the second limiting tile 5 is designed as an engaged form. Specifically, the splicing surface of the first limiting tile 4 and the second limiting tile 5 is provided with the convex teeth 14 and the recess 15 which are engaged with each other, and the development shape of the convex teeth 14 and the recess 15 is a rectangular structure. In this way, when the steel bar inserted between the first limiting tile 4 and the second limiting tile 5 is expanded and separated, the engaged form of the convex teeth 14 and the recess 15 makes the first limiting tile 4 and the second limiting tile 5 not relatively axially move, so as to facilitate the accurate buckling of the steel bar end by the locking sleeve 3. Further, after the first limiting tile 4 and the second limiting tile 5 are expanded and separated, in order to facilitate the rapid resetting and buckling, the tight spring 6 is sleeved outside the first limiting tile 4 and the second limiting tile 5, and the ring groove 16 is arranged on the locking sleeve 3, so that the tight spring 6 is sleeved in the ring groove 16, thereby making the tight spring 6 not protrude from the surface of the locking sleeve 3. When the steel bar is inserted, the first limiting tile 4 and the second limiting tile 5 are expanded and separated, and the tight spring 6 is forced to expand. At this time, the diameter of the tight spring 6 is expanded, so that the first limiting tile 4 and the second limiting tile 5 can be smoothly separated. When the steel bar is inserted in place, the first limiting tile 4 and the second limiting tile 5 are buckled, at this time, the tight spring 6 is wound and shrunk to restore the original diameter, thereby applying the tight force to the first limiting tile 4 and the second limiting tile 5.

[0037] At this time, although the steel bar has been inserted, the open outer end of the inner cavity 2 does not limit the locking sleeve 3, that is, the steel bar can take out the locking sleeve 3 together. In order to fix the locking sleeve 3 together with the steel bar in the connecting sleeve 1, as shown in Figure 1 、 Figure 3 , a jacking nut 8 is screwed at the open outer end, the jacking nut 8 is provided with a through hole 9 through which the steel bar passes along the axial direction, and the end of the steel bar is inserted into the inner cavity 2 through the through hole 9. In actual use, the jacking nut 8 can be sleeved on the end of the steel bar in advance, and then the steel bar is inserted into the inner cavity 2. Figure 3As shown, the through hole 9 is provided with a first conical surface 10 on the inner wall of one end in the inner cavity 2, and a second conical surface 11 is provided at the bottom of the inner cavity 2. The slopes of the first conical surface 10 and the second conical surface 11 are in opposite directions, so that the first conical surface 10 and the second conical surface 11 form a trumpet shape that is relatively arranged. When the tightening nut 8 is screwed into the inner cavity 2, the first conical surface 10 and the second conical surface 11 squeeze and fix the locking sleeve 3 from both sides. As the tightening nut 8 enters, the slope of the first conical surface 10 contacts the first end of the locking sleeve 3, and pushes the locking sleeve 3 to move toward the bottom of the inner cavity 2, and makes the second end of the locking sleeve 3 contact the second conical surface 11, and continues to screw in the tightening nut 8. As the conical surfaces on both sides continue to squeeze toward the middle, the end of the locking sleeve 3 can be squeezed tighter and tighter toward the center by sliding the inclined surface, and the fixing effect of the steel bar is getting better and better.

[0038] Example 2:

[0039] In the above embodiment, the locking sleeve 3 is fixed by gradually squeezing and fixing from the conical surfaces at both ends. However, when the device is used to connect the steel bars, the length of the steel bars inserted into the inner cavity 2 can be relatively long. Compared with the prior art in which the connection and fixation are performed at the ends of the steel bars, inserting a certain length of steel bars can improve the radial load capacity of the steel bar connection part. Therefore, when the insertion end is long, the first embodiment only fixes the two ends of the locking sleeve 3, which appears to be not strong enough.

[0040] As an improvement, in this embodiment, a central clamping structure is added to the locking sleeve 3. The central clamping structure can be provided at multiple locations according to the length of the inserted steel bar. This embodiment is described with only one location as an example. Figure 2 、 Figure 3 As shown, the outer wall protrusion of the middle part of the locking sleeve 3 is provided with a conical convex ring 12, and the conical convex ring 12 has a conical slope in the same direction as the second conical surface 11. The inner cavity 2 is provided with a clamping ring wall 13, and the clamping ring wall 13 is provided by the inner wall protrusion of the inner cavity 2. At this time, the annular groove 16 can be set on both sides of the conical convex ring 12, and the clamping ring wall 13 cooperates with the conical convex ring 12 to clamp the middle part of the locking sleeve 3, and a top spring 7 is provided between the locking sleeve 3 and the bottom end of the inner cavity 2; specifically, when the steel bar is inserted into the locking sleeve 3, the locking sleeve 3 will not be pushed to the bottom of the inner cavity 2, but will expand in situ. In this process, the top spring 7 pushes the locking sleeve 3 back to its original position so that the locking sleeve 3 can expand freely. Figure 3As shown, the conical convex ring 12 and the conical slope surface have not been in close contact at this time, so the locking sleeve 3 can still be expanded by the expansion gap 19 at this time. When the top nut 8 is screwed in the next step, the top nut 8 extrudes the top spring 7 to compress it, thereby moving the locking sleeve 3 to the bottom of the inner cavity 2. At this time, the conical convex ring 12 is in contact with the inclined surface of the clamping ring wall 13, and as the locking sleeve 3 moves, the clamping force of the clamping ring wall 13 on the locking sleeve 3 gradually increases, thereby achieving the effect of applying a clamping force to the middle part as the locking sleeve 3 moves. Thus, after the connector is fixed, a firm locking of the steel bar end and the middle part can be formed.

[0041] Example Three:

[0042] In the production of steel bar welded mesh, threaded steel is usually used. The surface of the threaded steel has certain anti-skid protrusions, which have a certain fixing effect when inserted into the locking sleeve 3. However, in order to improve the connection firmness of the connector and the steel bar end, the principle of interlocking of ratchet teeth is used in this embodiment. Not only is the insertion of the steel bar facilitated, but also the steel bar can be prevented from being pulled out in future use. Specifically, as shown in Figure 2 、 Figure 3 , a first ratchet ring 17 is arranged on the inner wall of the locking sleeve 3, and a second ratchet ring 18 is arranged on the end of the steel bar. The first ratchet ring 17 and the second ratchet ring 18 have the same specifications and opposite directions. The steel bar is inserted into the locking sleeve 3 to limit its pulling out by the ratchet teeth. The structure of the ratchet teeth also has the advantage of facilitating the control of the length of the inserted steel bar. In actual use, the length of the inserted steel bar can be easily controlled, which is more convenient for connecting steel bars of different lengths.

[0043] Example Four:

[0044] The connector can be used in various ways, such as anchor use, straight line use, T-shaped use, and steel mesh connection use. Specifically, when used as an anchor, only one connector sleeve 1 is provided, which can be welded to the fixed end. When the steel bar is inserted, the anchor effect is formed.

[0045] For straight line use, two connectors are connected in a straight line to form a one-dimensional structure. The two connectors are arranged away from each other, with one end open. The steel bars are connected at both ends of the steel bar welded steel bar, as shown in Figure 4 , the two open ends of the steel bar are inserted to form a connection between the two steel bar ends.

[0046] For T-shaped use, as shown in Figure 5 , three connectors are connected in a T shape. The third connector is arranged perpendicularly on the side of the one-dimensional connection structure to form a T-shaped central structure for connecting three steel bars.

[0047] The steel bar net connection uses, it includes the connecting skeleton 20, the connecting skeleton 20 includes connecting longitudinal reinforcement 21, connecting longitudinal reinforcement 21 both sides are vertically provided with several connectors respectively, in the use mode, it can make the several steel bars end of two steel bar welded nets close to each other correspondingly inserted in the corresponding connector, as shown in Figure 6 And because the connecting longitudinal reinforcement 21 is formed at the connecting place of two steel bar welded nets, the carrying capacity of the connecting place of steel bar welded net is improved, the crack problem caused by the connecting place in the future use is effectively avoided, and the two side connectors can be aligned or staggered during actual production and processing, so two different splicing positions of the corresponding steel bar welded net are provided.

[0048] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A high-speed bridge deck anti-crack steel bar welded mesh connector, characterized in that: The connector comprises a connecting sleeve (1), the connecting sleeve (1) having an inner cavity (2), one end of the inner cavity (2) being an open outer end, and the steel bars of the steel welded mesh are inserted into the inner cavity (2) through the open outer end; A locking sleeve (3) is provided in the inner cavity (2) and is movable along its axis. The locking sleeve (3) is composed of a first limiting tile (4) and a second limiting tile (5) that are engaged with each other. A tightening spring (6) is provided on the outside of the first limiting tile (4) and the second limiting tile (5). The end of the steel bar is inserted into the locking sleeve (3) to limit its position. A top spring (7) is provided between the locking sleeve (3) and the bottom end of the inner cavity (2). The open outer end is screwed with a tightening screw sleeve (8), and the tightening screw sleeve (8) is provided with a through hole (9) along the axial direction for the hole steel bar to pass through. The through hole (9) is provided with a first conical surface (10) on the inner wall of one end in the inner cavity (2), and a second conical surface (11) is provided at the bottom of the inner cavity (2). The slope directions of the first conical surface (10) and the second conical surface (11) are opposite. When the tightening screw sleeve (8) is screwed into the inner cavity (2), the first conical surface (10) and the second conical surface (11) squeeze and fix the locking sleeve (3) from both sides. The outer wall of the middle portion of the locking sleeve (3) is convexly provided with a conical convex ring (12), the conical convex ring (12) having a conical slope in the same direction as the second conical surface (11), and the inner cavity (2) is provided with a clamping ring wall (13), the clamping ring wall (13) and the conical convex ring (12) cooperate to clamp the middle portion of the locking sleeve (3); The joint surface where the first limiting tile (4) and the second limiting tile (5) are joined together is provided with mutually meshing convex teeth (14) and grooves (15), and the convex teeth (14) and the grooves (15) are both rectangular structures; when the end of the steel bar is inserted into the locking sleeve (3), the first limiting tile (4) and the second limiting tile (5) are expanded and separated from the joint surface; The locking sleeve (3) is provided with annular grooves (16) on both sides of the conical convex ring (12), and the tightening spring (6) is provided with two annular grooves (16) respectively. The inner wall of the locking sleeve (3) is provided with a first ratchet ring (17), and the end of the steel bar is processed and provided with a second ratchet ring (18). The first ratchet ring (17) and the second ratchet ring (18) have the same processing specifications and are oriented in opposite directions. The steel bar is inserted into the locking sleeve (3) and is limited by the ratchet to prevent it from being pulled out. An expansion gap (19) is provided between the inner cavity (2) and the locking sleeve (3), and the expansion gap (19) is not less than the expansion amount of the first limiting tile (4) and the second limiting tile (5) when the end of the steel bar is inserted into the locking sleeve (3).

2. The high-speed bridge deck anti-cracking steel bar welded mesh connector according to claim 1, characterized in that: The connectors are connected in a straight line, and the two connectors are separated from each other and have open outer ends at one end, and the two ends are connected to the ends of the steel bars welded to the steel bars.

3. The high-speed bridge deck anti-cracking steel bar welded mesh connector according to claim 2, characterized in that: The connectors are connected in a T-shape, and a third connector is vertically arranged on the side of the T-shaped connection structure to form a T-shaped central structure connected by three steel bars.

4. The high-speed bridge deck anti-cracking steel bar welded mesh connector according to claim 1, characterized in that: It also includes a connecting frame (20), wherein the connecting frame (20) includes connecting longitudinal ribs (21), and a plurality of connectors are vertically provided on both sides of the connecting longitudinal ribs (21), and the connectors on both sides are aligned or staggered.

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