阅读说明：本技术 一种公路桥梁施工用预应力锚具 (Prestressed anchorage utensil is used in public road bridge roof beam construction ) 是由 张建录 郝建 冀文俊 马元红 冯玮 李学东 吴晓强 于 2021-06-24 设计创作，主要内容包括：本发明实施例公开了一种公路桥梁施工用预应力锚具,涉及预应力锚具技术领域,主要是为了解决现有公路桥梁施工用预应力锚具存在钢绞线安装不便的问题,包括钢绞线和套设在钢绞线上的第一弹簧,还包括穿线组件、第一挤压组件和第二挤压组件,第一穿线部能够同时穿过多根钢绞线,预装在第一穿线部和第二穿线部内的第一挤压组件和第二挤压组件,第二挤压组中驱动部带动第二挤压部运动能够快速将钢绞线固定,同时第一挤压组件内的弹性部、第二挤压部和位于第二穿线部上的插接部的配合使用能够将位于第一穿线部内的多根钢绞线夹紧固定,具备安装方便的特点。(The embodiment of the invention discloses a pre-stressed anchor for highway bridge construction, which relates to the technical field of pre-stressed anchors and mainly aims to solve the problem that the existing pre-stressed anchor for highway bridge construction is inconvenient in steel strand installation, and comprises steel strands, a first spring sleeved on the steel strands, a threading assembly, a first extrusion assembly and a second extrusion assembly, wherein a first threading part can simultaneously penetrate through the steel strands, the first extrusion assembly and the second extrusion assembly are pre-installed in the first threading part and the second threading part, a driving part in the second extrusion assembly drives the second extrusion part to move so as to quickly fix the steel strands, simultaneously, the elastic part in the first extrusion assembly, the second extrusion part and the insertion part on the second threading part are matched to clamp and fix a plurality of steel strands in the first threading part, and the steel strand threading device has the characteristic of convenience in installation.)

1. The utility model provides a prestressed anchorage utensil is used in public road bridge roof beam construction, includes steel strand wires and establishes the first spring on the steel strand wires, its characterized in that still includes:

the threading assembly comprises a first threading part for centralizing a plurality of steel strands and a second threading part for dispersing the plurality of steel strands; and

the first extrusion assembly is positioned in the first threading part and comprises a plurality of first extrusion parts for fixing the steel strand; and an elastic part for fixing the position of the first pressing part; and

the second extrusion assembly is positioned in the second threading part and comprises a second extrusion part for fixing the single steel strand; and the second threading part is also provided with a plugging part which is used for overcoming the elasticity of the elastic part and driving the first extrusion part to move.

2. The prestressed anchorage device for construction of road and bridge according to claim 1, wherein said first pressing portion includes a first stopper portion for stopping movement of the steel strand; and the first pressure bearing part is used for bearing the pressure of the inserting part so as to drive the first limiting part to move towards the direction close to the steel strand.

3. The pre-stressed anchor for road and bridge construction as claimed in claim 1, wherein the first threading part comprises a first body part for mounting the first pressing member; and a first passing part for passing through the plurality of steel strands simultaneously.

4. The pre-stressed anchor for road and bridge construction as claimed in claim 1, wherein the second threading part comprises a second body part for mounting a second extrusion assembly; the second through parts are used for the single steel strand to pass through; the plurality of second passing parts are uniformly distributed on the second main body part, the first passing part is positioned in the center of the first main body part, and the first main body part and the second main body part are coaxial.

5. The pre-stressed anchorage device for road and bridge construction as claimed in claim 1, wherein the driving part comprises a rotating part on the second main body part; and the threaded parts are positioned on the second main body part and the rotating part, and the rotating motion of the rotating part is converted into the linear motion of the rotating part towards the direction close to or far away from the second squeezing component through the threaded parts.

6. The pre-stressed anchor for road and bridge construction as claimed in claim 1, wherein the second pressing portion comprises a second stopper portion for stopping the movement of the steel strand; and the second pressure bearing part is used for bearing the pressure of the rotating part and driving the second limiting part to move towards the direction close to or far away from the steel strand.

7. The pre-stressed anchor for road and bridge construction as claimed in claim 2, wherein the number of the first position-limiting portions and the second position-limiting portions is several, the first position-limiting portions are centrosymmetric with respect to the first main body portion, and the second pressure-bearing portion drives the second position-limiting portions to move.

8. The pre-stressed anchor for road and bridge construction as claimed in claim 5, wherein the first main body portion and the second main body portion are connected by inserting and fastening and are fixedly connected by a plurality of fastening members.

Technical Field

The application relates to the technical field of prestressed anchorage devices, in particular to a prestressed anchorage device for highway bridge construction.

Background

The prestressed anchorage is suitable for engineering construction process, and the ground tackle that the prestressed concrete tensioning used often uses in large-span and overlength industry and civil construction and bridge construction, installs the location in advance, then pours the concrete, buries at the both ends of concrete, also is exactly two ends of bellows, makes more stable of jack during stretch-draw.

The steel strands in the existing pre-stressed anchor for highway bridge construction are generally fixed with an anchor plate by using clamping pieces or pressing plates, the steel strands are complex to install in the mode, and in order to centralize the steel strands, the steel strands need to pass through a through hole, so that the steel strands are always stressed when the last steel strands are installed.

Disclosure of Invention

An embodiment of the present invention provides a prestressed anchorage device for highway bridge construction, so as to solve the problems in the background art.

In order to achieve the above purpose, the present application provides the following technical solutions:

the utility model provides a prestressed anchorage utensil is used in public road bridge roof beam construction, includes steel strand wires and the first spring of cover on the steel strand wires, still includes:

the threading assembly comprises a first threading part for centralizing a plurality of steel strands and a second threading part for dispersing the plurality of steel strands; and

the first extrusion assembly is positioned in the first threading part and comprises a plurality of first extrusion parts for fixing the steel strand; and an elastic part for fixing the position of the first pressing part; and

the second extrusion assembly is positioned in the second threading part and comprises a second extrusion part for fixing the single steel strand; and the second threading part is also provided with a plugging part which is used for overcoming the elasticity of the elastic part and driving the first extrusion part to move.

As a further aspect of the present application: the first extrusion part comprises a first limiting part for preventing the steel strand from moving; and the first pressure bearing part is used for bearing the pressure of the inserting part so as to drive the first limiting part to move towards the direction close to the steel strand.

As a still further aspect of the present application: the first threading part comprises a first main body part for mounting a first extrusion assembly; and a first passing part for passing through the plurality of steel strands simultaneously.

As a still further aspect of the present application: the second threading part comprises a second main body part for mounting a second extrusion component; the second through parts are used for the single steel strand to pass through; the plurality of second passing parts are uniformly distributed on the second main body part, the first passing part is positioned in the center of the first main body part, and the first main body part and the second main body part are coaxial.

As a still further aspect of the present application: the cleaning mechanism is further included, and the driving part comprises a rotating part positioned on the second main body part; and the threaded parts are positioned on the second main body part and the rotating part, and the rotating motion of the rotating part is converted into the linear motion of the rotating part towards the direction close to or far away from the second squeezing component through the threaded parts.

As a still further aspect of the present application: the second extrusion part comprises a second limiting part for preventing the steel strand from moving; and the second pressure bearing part is used for bearing the pressure of the rotating part and driving the second limiting part to move towards the direction close to or far away from the steel strand.

As a still further aspect of the present application: the first limiting parts and the second limiting parts are arranged in a plurality of numbers, the first limiting parts are in central symmetry relative to the first main body part, and the second pressure-bearing part drives the second limiting parts to move.

As a still further aspect of the present application: the adjusting mechanism is further included, and the first main body part and the second main body part are connected in an inserting and combining mode and are fixedly connected through a plurality of fixing parts.

Compared with the prior art, the beneficial effects of this application are:

the caliber of the first threading part is large enough, a plurality of steel strands can be easily penetrated, the steel strands can be quickly fixed by the first extrusion assembly and the second extrusion assembly which are preassembled in the first threading part and the second threading part, and meanwhile, the plurality of steel strands in the first threading part can be clamped and fixed by the elastic part and the second extrusion part in the first extrusion assembly and the insertion part on the second threading part in a matched mode, so that the problem that the conventional prestress anchor for highway bridge construction is inconvenient to install the steel strands is solved.

Drawings

Fig. 1 is a partial sectional view of a pre-stressed anchor for highway bridge construction according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion of a second compression assembly in an embodiment of the present invention.

FIG. 3 is an enlarged view of a portion of the first compression assembly in an embodiment of the present invention.

Fig. 4 is an isometric view of a first thread-through in an embodiment of the invention.

Fig. 5 is a side view of the first threading part in an embodiment of the invention.

In the figure: the steel wire rope comprises a steel strand 1, a first spring 2, a fixed seat 3, a slot 31, a thread 32, a first rope threading hole 33, a conical seat 4, a second rope threading hole 41, a first bulge 42, a cavity 43, an inserted bar 5, a gland 6, a fixed pin 7, a bearing block 8, a second spring 9, a sliding bar 10, a first ball 11, a first pressing block 12, a second ball 13, a sliding block 14, a second pressing block 15, a second bulge 16 and a third spring 17.

Detailed Description

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Referring to fig. 1, the present embodiment provides a pre-stressed anchor for highway bridge construction, including a steel strand 1 and a first spring 2 sleeved on the steel strand 1, further including:

the threading assembly comprises a first threading part for centralizing the plurality of steel strands 1 and a second threading part for dispersing the plurality of steel strands 1; and

the first extrusion assembly is positioned in the first threading part and comprises a plurality of first extrusion parts for fixing the steel strand 1; and an elastic part for fixing the position of the first pressing part; and

the second extrusion assembly is positioned in the second threading part and comprises a second extrusion part used for fixing the single steel strand 1; and the second threading part is also provided with a plug-in part for overcoming the elasticity of the elastic part to drive the second extrusion part to move.

Referring to fig. 1 to 3, in the above-mentioned technical solutions, the steel strand 1 and the first spring 2 are common parts in the existing pre-stressed anchor for road bridge construction, and may be replaced by other parts, which are not described again.

Referring to fig. 3 to 5, further, the first pressing portion includes a first limiting portion for preventing the steel strand 1 from moving; the first limiting part is designed into a second pressing block 15, the outline of the second pressing block 15 shown in the drawing of the technical scheme is arc-shaped, the arc-shaped design is to better match a steel strand bundle formed by centralizing a plurality of steel strands 1, the steel strand bundle can be wrapped and attached more closely, the outline of the second pressing block 15 can be designed into other shapes such as rectangle and trapezoid, and the shape of the second pressing block 15 can be designed into a conventional technical means as long as the function of fixing the steel strand bundle is met, so that repeated description is omitted;

referring to fig. 3, the pressure-bearing portion is designed as a sliding block 14, and an end of the sliding block 14 is designed with an inclined surface, which can convert the pressure received from the insertion portion into a force pushing the sliding block 14 and the second pressing block 15 to slide along a direction perpendicular to (or forming an acute angle or an obtuse angle with the pressure direction of the insertion portion, where the pressure is not limited by) the direction, that is, the pressure of the second pressing block 15 on the steel strand 1, so as to increase the friction between the second pressing block 15 and the steel strand 1, thereby improving the tensile strength of the steel strand 1; the sliding block 14 and the second pressing block 15 shown in the drawing of the technical scheme are fixedly connected (are an integral piece), and certainly, the sliding block can also be designed to be in a contact connection mode, that is, the second pressing block 15 and the sliding block 14 are both designed to be independent components, the sliding of the sliding block 14 drives the second pressing block 15 to slide, the mode has the disadvantages that the number of the components is increased, and the installation is complicated, the elastic part is designed to be the third spring 17, the third spring 17 is sleeved on the sliding block 14, the position of the second pressing block 15 can be fixed at the position closest to the first threading hole 33 by the elastic force of the third spring 17, so that the diameter of the steel strand 1 allowed to pass is kept in the maximum range, and the process that the sliding block 14 drives the second pressing block 15 to fix the steel strand 1 is equivalent to a process of reducing the diameter of the steel strand 1 allowed to pass.

Referring to fig. 3, preferably, the surface of the second pressing block 15 has a plurality of second protrusions 16, and the structural form of the second protrusions 16 may be designed as spherical protrusions or thorn-shaped protrusions, which is not limited herein and will not be described again, where the purpose of the second protrusions 16 is to further increase the friction between the second pressing block 15 and the steel strand 1, thereby further improving the tensile strength of the steel strand 1.

Referring to fig. 1 and 4, further, the first threading part includes a first main body part for mounting the first pressing component; and a first passing portion for a plurality of steel strands 1 to pass simultaneously, the first main body portion is designed into a fixed seat 3, the shape of the fixed seat 3 can be designed into a cylinder or a cube or a cone, no limitation is made here, and repeated description is omitted, the first passing portion is a first threading hole 33 formed in the fixed seat 3, the diameter of the first threading hole 33 is large enough, and the steel strands 1 with the largest number in the anchorage device used in the market can be allowed to pass.

Referring to fig. 4 to 5, preferably, the fixing base 3 is further provided with a slot 31 used in cooperation with the insertion portion, the slot 31 is communicated with the first threading hole 33 through a sliding slot, one end of the sliding block 14 is located in the slot 31, and the other end of the sliding block is located in the sliding slot and connected to the second pressing block 15 located in the first threading hole 33.

Referring to fig. 1, further, the second threading portion includes a second main body portion for mounting the second pressing assembly; the second through parts are used for the single steel strand 1 to pass through; the plurality of second through parts are uniformly distributed on the second main body part, the first through part is located in the center of the first main body part, the first main body part and the second main body part are coaxial, the second main body part is designed to be a conical seat 4, a conical groove matched with the conical seat 4 is formed in the corresponding fixing seat 3, besides the appearance of the second main body part shown in the drawing in the scheme, the second main body part can be designed to be cylindrical or cubic, specific limitation is not needed here, repeated description is omitted, and the conical seat 4 is provided with a plurality of second threading holes 41 only allowing the single steel strand 1 to pass through.

Preferably, the first threading hole 33 and the second threading hole 41 can also be designed as detachable threading tubes, and are not limited here and are not repeated.

Referring to fig. 1, further, the driving portion includes a rotating portion located on the second main body portion; and the screw thread part is positioned on the second main body part and the rotating part, the rotating motion of the rotating part is converted into the linear motion of the rotating part towards the direction close to or far away from the second extrusion assembly through the screw thread part, the rotating part is designed into the gland 6, the screw thread part is the screw thread 32 arranged on the periphery of the gland 6 and the inner wall of the fixing seat 31, the screw thread 32 comprises an external screw thread and an internal screw thread, the structure is a common structure in the prior art, the repeated description is omitted here, and the function that the gland 6 slides in the fixing seat 31 can be realized through the rotating gland 6.

Preferably, in order to rotate the gland 6, the gland 6 may be further designed with a knob convenient for a worker to operate or a groove or a protrusion etc. convenient for the worker to rotate the gland 6 by a tool, which is not limited herein and will not be described any further.

Referring to fig. 2, further, the second pressing portion includes a second limiting portion for preventing the steel strand 1 from moving; and a second pressure-bearing part for bearing the pressure of the rotating part and driving the second limiting part to move towards the direction close to or far away from the steel strand 1, wherein the second limiting part comprises a first protrusion 42 and a first pressing block 12, the first protrusion 42 is fixedly connected to the inner wall of the first protrusion 42, the first pressing block 12 is positioned at the opposite side of the first protrusion 42, the steel strand 1 is positioned between the first pressing block 12 and the first protrusion 42, both sides of the first pressing block 12 are designed with inclined planes, wherein the inclined plane at one side is used for converting the pressure of the second limiting part into the pressure (the sliding block 14 is referred to the motion principle) on the steel strand 1, the inclined plane at the other side is used for reducing the contact area between the first pressing block 12 and the steel strand 1, and is preferably in line contact with the steel strand 1, so as to further increase the friction force between the first pressing block 12 and the steel strand 1, the matching form of the first protrusion 42 and the steel strand 1 is consistent with that of the first pressing block 12, the tensile capacity of the steel strand 1 is further improved;

referring to fig. 2, the second pressure-bearing portion includes a pressure-bearing block 8, a second spring 9, a sliding rod 10 and a first ball 11, the pressure-bearing block 8, the sliding rod 10 and the first ball 11 are fixedly connected, the second spring 9 is sleeved on the sliding rod 10, the gland 6 rotates and moves towards the direction close to the gland 6 while extruding the gland 6, the elastic force of the second spring 9 is overcome to drive the sliding rod 10 and the first ball 11 to move and extrude the first press block 12, so as to realize the function of fixing the steel strand 1, the anchor has the characteristic of convenient operation, when the anchor needs to be recycled, the gland 6 can be rotated reversely, the elastic force of the second spring 9 can drive the pressure-bearing block 8, the sliding rod 10 and the first ball 11 to reset, so that the first press block 12 fixes the steel strand 1, at this time, the steel strand 1 can be drawn out for recycling, and it needs to be noted that the gland 6 is prevented from being blocked or solidified by concrete, need be in the 6 outside design of gland protection casings, this protection casing is connected with fixing base 3, prevents that the concrete from getting into in fixing base 3 to realized the function of convenient to detach steel strand wires 1.

Preferably, a cavity 43 is formed in the conical seat 4, and the sliding rod 10, the first ball 11 and the first pressing block 12 are slidably connected in the cavity 43.

Referring to fig. 1, 4 and 5, preferably, the number of the first limiting portions and the second limiting portions is a plurality, the plurality of first limiting portions are centrosymmetric with respect to the first main body portion, and the second pressure-bearing portion simultaneously drives the plurality of second limiting portions to move, the number of the first limiting portions in the drawing in the scheme is three, and certainly can also be designed to be a plurality, and here, no limitation is made, a first ball 11 in a single cavity 43 can simultaneously extrude a plurality of first pressing blocks 12, and the plurality of first pressing blocks 12 are centrosymmetric with respect to the axis of the sliding rod 10, so that the function of simultaneously fixing a plurality of steel strands 1 is realized, and the fixing device has the characteristics of convenience in fixing and high efficiency.

Referring to the attached drawing 3, further, the insertion part is designed to be an insertion rod 5 and a second ball 13, the insertion rod 5 and the conical seat 4 are fixedly connected, the second ball 13 and the insertion joint are connected in the slot 31 on the fixing seat 3, the second ball 13 drives the second pressing block 15 to fix the steel strand 1 through the extrusion sliding block 14, and the steel strand fixing device has the characteristics of being convenient to operate, namely 6.

When in use, the steel strands 1 firstly pass through the first threading holes 33 on the fixed seat 3 in a centralized manner, then pass through the second threading holes 41 on the conical seat 4 one by one, then rotate the gland 6, move the gland 6 towards the direction close to the gland 6 while rotating the gland 6, overcome the elasticity of the second spring 9 to drive the slide bar 10 and the first ball 11 to move and extrude the first press block 12, thereby realizing the function of fixing the steel strands 1, then the conical seat 4 fixed with a plurality of steel strands 1 is installed on the fixed seat 3, the slide block 14 and the second press block 15 can be driven to fix the plurality of steel strands 1 in the first threading holes 33 by inserting the inserting rod 5 on the conical seat 4 into the slot 31 on the fixed seat 3, because the gland 6, the slide bar 10, the slide block 14, the first press block 12 and the second press block 15 which are used for fixing the steel strands 1 are all pre-installed in the fixed seat 3 and the conical seat 4, consequently can be simpler when on-the-spot installation steel strand wires, first through wires hole 33's diameter is bigger simultaneously, can solve several last steel strand wires 1 of installation more difficult simultaneously, second briquetting 15 that is located first through wires hole 33 can be fixed with steel strand wires 1 again, possesses the effect of adjusting first through wires hole 33 bore size, and the combined action of first briquetting 12 and second briquetting 15 can make steel strand wires 1's tensile ability stronger moreover.

Referring to fig. 2 to 4, as an embodiment of the present application, the first main body portion and the second main body portion are inserted and connected and fixedly connected through a plurality of fixing members, the fixing members are designed as a plurality of fixing pins 7, the steel strand 1 firstly passes through the first threading hole 33 on the fixing base 3, then the steel strand 1 is inserted into the second threading hole 41 on the conical base 4 one by one and fixed, at this time, one end of the steel strand 1 and the conical base 4 form a whole, then the inserting rod 5 on the conical base 4 is inserted into the inserting slot 31 on the fixing base 3, the inserting process can clamp and fix the plurality of steel strands 1 in the first threading hole 33 by the second pressing block 15, and then the fixing base 3 and the conical base 4 are fixedly connected through the fixing pins 7 to form a whole.

To sum up, the bore of first threading portion is enough big, can pass many steel strands 1 relatively easily, and the cooperation of the first extrusion subassembly and the second extrusion subassembly of pre-installation in first threading portion and second threading portion can be fixed with steel strands 1 fast, and the elastic component in the first extrusion subassembly, the cooperation of second extrusion portion and the grafting portion that is located the second threading portion simultaneously uses and can press from both sides tightly many steel strands 1 that are located first threading portion fixedly, has solved current prestressing anchor utensil for highway bridge construction and has had the inconvenient problem of steel strands 1 installation.

It should be noted that, although the present specification describes embodiments, each embodiment does not include only a single technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present application, several modifications, improvements and substitutions can be made, which are all within the protection scope of the present technical solution.