Prefabricated box girder catenary foundation steel bar spacing positioning tool

Abstract

The utility model discloses a prefabricated box girder catenary foundation steel bar spacing positioning frock belongs to railway engineering construction auxiliary equipment technical field, including positioning part and elevating part, and positioning part is by fixed connection of clamping groove vertical plate and clamping groove bottom plate and is constituted, and the multiple recesses that match with the steel bar outer contour are set up on clamping groove vertical plate along the length direction, realizes the forced accurate clamping of steel bar, elevating part top is fixed in clamping groove bottom plate bottom, and through the adjusting lever control X telescopic structure elevating, accurately sets the vertical height of positioning part relative to the bottom layer steel bar. The whole adopts aluminum alloy material quality to reduce the weight, and is convenient for installation and dismounting. The utility model discloses through mechanical clamping groove forced positioning replaces manual measurement, and combines adjustable support device accurate setting floor height, effectively solved the problem that traditional method steel bar spacing and floor height deviation are big, has improved construction accuracy and efficiency significantly, has guaranteed catenary foundation pre -buried quality.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for railway engineering construction, specifically to a positioning tool for the spacing of reinforcing bars in the foundation of a precast box girder contact wire. Background Technology

[0002] The overhead contact system (or catenary) is a high-voltage power transmission line erected in a zigzag pattern above the rails in electrified railways, supplying current to the pantograph. The catenary foundation is the "foundation" of the system, and its design and construction quality directly determines the safety of power supply and the reliability of the line. A stable foundation is the core guarantee for the catenary to withstand natural forces, maintain geometric accuracy, and extend equipment life. Deviations in the specifications, quantity, or position of the reinforcing steel bars in the catenary foundation can weaken its bending and shear resistance. Positional deviations in the reinforcing steel bars may cause the foundation to crack or shift under train vibration or strong wind loads, and in extreme cases, lead to collapse.

[0003] In the construction of the precast box girder contact network foundation reinforcement binding, the precision control of the reinforcement spacing is crucial. Traditional construction methods mainly rely on workers using rulers to manually measure and position the reinforcement before binding. This method is not only cumbersome and inefficient, but also susceptible to human factors, and the final reinforcement spacing generally has large deviations. It is difficult to meet the strict requirements of design and specifications for the pre-embedded accuracy of the contact network support foundation, thus creating potential quality problems for subsequent contact network installation and the stability of the railway power supply system. Utility Model Content

[0004] The purpose of this utility model is to provide a tooling for positioning the spacing of reinforcing bars in the foundation of precast box girder contact wire, so as to solve the problem of large deviation in the spacing of reinforcing bars after manual measurement and positioning mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a positioning fixture for the spacing of reinforcing bars in the foundation of a precast box girder contact wire, comprising a positioning component and a lifting component. The positioning component includes a slotted upright plate and a slotted bottom plate. The bottom of the slotted upright plate is fixedly connected to the slotted bottom plate. Multiple grooves are formed on the slotted upright plate, all distributed along its length. The top of the lifting component is fixedly connected to the bottom of the slotted bottom plate, and the lifting component is used to adjust the vertical height of the positioning component relative to the bottom reinforcing bars of the precast box girder.

[0006] Furthermore, each groove extends along the thickness direction of the slot plate, and the outline of each groove matches the outer outline of the reinforcing bar to be positioned, so that the reinforcing bar to be positioned is engaged in the groove.

[0007] Furthermore, the lifting component includes a first telescopic component and a second telescopic component. The first telescopic component is disposed on one side below the card slot base plate, and the second telescopic component is disposed on the other side below the card slot base plate.

[0008] Furthermore, the first telescopic component includes a top plate, a bottom plate, and an X-shaped telescopic structure. One end of the X-shaped telescopic structure is connected to the first surface of the top plate, and the other end of the X-shaped telescopic structure is connected to the bottom plate. The second surface of the top plate is fixedly connected to the bottom of the slot bottom plate, and the second surface of the top plate is located on the side opposite to the first surface of the top plate.

[0009] Furthermore, the lifting component also includes an adjusting rod, which is a threaded rod, and the height of the X-shaped telescopic structure is controlled by rotating the adjusting rod.

[0010] Furthermore, the second telescopic component has the same structure as the first telescopic component.

[0011] Furthermore, the fixture for positioning the spacing of the reinforcing bars in the foundation of the precast box girder contact network also includes a first steel ruler and a second steel ruler. The first steel ruler is detachably fixed to one side of the first telescopic component, and the second steel ruler is detachably fixed to one side of the second telescopic component.

[0012] Furthermore, the card slot upright plate, card slot bottom plate, and lifting components are all made of aluminum alloy.

[0013] This utility model has the following advantages over the prior art:

[0014] 1. This utility model utilizes a positioning component with a specific contoured groove, allowing reinforcing bars to be directly inserted into the groove. The shape and spacing of the groove are pre-processed according to the design drawings, ensuring that each reinforcing bar is forcibly positioned in the precise design location. This fundamentally eliminates reading errors, visual errors, and operational inconsistencies caused by manual measurement, significantly reducing deviations in reinforcing bar spacing and ensuring that the high-precision requirements for the pre-embedded foundation of the contact wire support are met.

[0015] 2. This utility model, through the cooperation of a measuring ruler and an adjustable height telescopic frame, can accurately set and lock the design spacing of the upper and lower layers of steel bars at one time, realizing synchronous, efficient, and high-precision positioning and control of the spacing of the double-layer steel bars, significantly improving the construction accuracy and efficiency of the layer spacing, and ensuring the overall quality of the foundation structure.

[0016] 3. This utility model eliminates the repetitive and tedious manual measurement and marking steps required in traditional methods. Workers only need to insert the rebars into the corresponding grooves to complete the positioning. The positioning process becomes fast, simple, and intuitive, significantly shortening the preparation time before rebar tying and improving overall construction efficiency. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention;

[0018] Figure 2 This is the left view of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1—Positioning component; 11—Slot upright plate; 12—Slot base plate;

[0021] 13—Groove; 2—Support assembly; 2-1—First telescopic assembly;

[0022] 2-2—Second telescopic assembly; 21—Top plate; 22—Bottom plate;

[0023] 23—X-type telescopic structure; 24—Adjusting rod; 25—First telescopic component;

[0024] 26—Second telescopic component; 31—First steel ruler; 32—Second steel ruler;

[0025] 41—First X-type telescopic bracket; 42—Second X-type telescopic bracket; 43—First fixing plate;

[0026] 44—Second fixing plate; 45—First sliding hole; 46—Second sliding hole;

[0027] 47—First horizontal bar; 48—Second horizontal bar. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] like Figure 1 and Figure 2 As shown, this embodiment of the utility model provides a positioning fixture for the spacing of the reinforcing bars in the foundation of a precast box girder contact network, including a positioning component 1 and a lifting component 2. The positioning component 1 includes a slotted upright plate 11 and a slotted bottom plate 12. The bottom of the slotted upright plate 11 is fixedly connected to the slotted bottom plate 12. Multiple grooves 13 are provided on the slotted upright plate 11, and all grooves 13 are distributed along the length of the slotted upright plate 11. The top of the lifting component 2 is fixedly connected to the bottom of the slotted bottom plate 12. The lifting component 2 is used to adjust the vertical height of the positioning component 1 relative to the bottom reinforcing bars of the precast box girder.

[0030] In this embodiment, by setting a positioning component 1 with a specific contoured groove 13, the reinforcing bars can be directly inserted into the groove 13. The shape and spacing of the groove 13 are pre-processed according to the design drawings, ensuring that each reinforcing bar can be forcibly positioned in the precise design position. By adjusting the vertical height of the positioning component 1 relative to the bottom reinforcing bars of the precast box girder by the lifting component 2, the spacing of each layer of reinforcing bars is controlled, thereby achieving precise positioning of the upper and lower layers of reinforcing bars in the contact wire network. This fundamentally eliminates reading errors, visual errors, and operational inconsistencies caused by manual measurement, significantly reduces the deviation of the reinforcing bar spacing, and ensures that the high-precision requirements of the contact wire support foundation pre-embedding are met.

[0031] like Figure 1 As shown, the lifting component 2 includes a first telescopic assembly 2-1 and a second telescopic assembly 2-2. The first telescopic assembly 2-1 is located on one side below the slot base plate 12, and the second telescopic assembly 2-2 is located on the other side below the slot base plate 12. The second telescopic assembly 2-2 has the same structure as the first telescopic assembly 2-1. The height-adjustable first telescopic assembly 2 can be a traditional spiral rod or a telescopic sleeve or other structure that is adjustable in height and fixed at a certain height. In this embodiment, the first telescopic assembly 2 adopts an X-shaped telescopic structure 23. The first telescopic assembly 2-1 includes a top plate 21, a bottom plate 22, and an X-shaped telescopic structure 23. One end of the X-shaped telescopic structure 23 is connected to the first surface of the top plate 21, and the other end of the X-shaped telescopic structure 23 is connected to the bottom plate 22. The second surface of the top plate 21 is fixedly connected to the bottom of the slot base plate 12, and the second surface of the top plate 21 is located on the side opposite to the first surface of the top plate 21. The X-type telescopic structure 23 can stably achieve adjustable and rigid locking of the distance between the top plate 21 and the bottom plate 22, significantly enhancing the adaptability of the tooling to different foundation surface flatness and different steel bar design spacing, and providing a stable and reliable height reference for the core positioning component slot.

[0032] In this embodiment, the X-shaped telescopic structure 23 includes a first telescopic component 25 and a second telescopic component 26. The first telescopic component 25 and the second telescopic component 26 have the same structure and are spaced apart between the top plate 21 and the bottom plate 22. The first telescopic component 25 includes a first X-shaped telescopic bracket 41, a second X-shaped telescopic bracket 42, a first fixing plate 43, and a second fixing plate 44. The first fixing plate 43 is fixedly mounted on the bottom of the top plate 21, and the second fixing plate 44 is fixedly mounted on the top of the bottom plate 22. The bottom end of the first X-shaped telescopic bracket 41 is hinged to the top end of the second X-shaped telescopic bracket 42. One side of the top end of the first X-shaped telescopic bracket 41 is rotatably connected to one end of the first fixing plate 43, and the other side of the top end of the first X-shaped telescopic bracket 41 is slidably connected to the first sliding hole 45 at the other end of the first fixing plate 43. One side of the bottom end of the second X-shaped telescopic bracket 42 is rotatably connected to one end of the second fixing plate 44, and the other side of the bottom end of the second X-shaped telescopic bracket 42 is slidably connected to the second sliding hole 46 at the other end of the second fixing plate 44. The two hinged X-shaped telescopic brackets are compact in design and provide a wide range of height adjustment capabilities. Compared to a single support column, it can achieve a greater working height range with a relatively small storage volume, significantly improving the adaptability of the tooling to different height requirements.

[0033] In this embodiment, the first telescopic component 25 and the second telescopic component 26 are connected by a crossbar. The two ends of the crossbar are fixedly connected to the corresponding hinge points of the first telescopic component 25 and the second telescopic component 26, respectively, to ensure that the top plate 21 remains horizontal during the lifting and lowering process of the first telescopic component 25 and the second telescopic component 26, preventing the rebar from tilting. The crossbars connected at the connection points of the first X-shaped telescopic bracket 41 and the second X-shaped telescopic bracket 42 are respectively the first crossbar 47 and the second crossbar 48. The adjusting rod 24 passes through the first crossbar 47 and the second crossbar 48, with its threaded end engaging with the first crossbar 47 and its smooth end connected to the bearing of the second crossbar 48. This fixture uses a rigid first crossbar 47 and second crossbar 48 connected in parallel to the first telescopic component 25 and the second telescopic component, and is driven by a threaded adjusting rod structure to achieve a rigid connection and absolutely forced synchronous movement of the two frames, ensuring the horizontal stability of the support platform. The use of a threaded pair transmission achieves high-magnification and high-precision adjustment of the driving force, making operation extremely labor-saving and precise; at the same time, the self-locking characteristic of the thread provides instant and reliable locking. This design enables the tooling to achieve high-precision, high-stability, convenient and labor-saving height adjustment under heavy loads.

[0034] In this embodiment, the precast box girder contact network foundation rebar spacing positioning fixture also includes a first steel ruler 31 and a second steel ruler 32. The first steel ruler 31 is detachably fixed to one side of the first telescopic component 2-1, and the second steel ruler 32 is detachably fixed to one side of the second telescopic component 2-2. The detachable steel rulers on the sides of the first and second telescopic components provide a directly related, visual, and accurate measurement benchmark for adjusting the height of the lifting components. This makes setting and verifying the rebar spacing and checking the height consistency of the support points on both sides extremely fast, intuitive, and reliable, significantly improving construction accuracy and efficiency. The detachable design also takes into account the protection of the measuring tools, ease of maintenance, and flexibility of use.

[0035] In this embodiment, the slot upright plate 11, the slot bottom plate 12, and the lifting component 2 are all made of aluminum alloy. The use of aluminum alloy for the entire tooling not only makes the tooling lightweight and allows one person to operate it independently, but also makes it more corrosion-resistant and rust-free in the high-temperature and high-humidity environment of the construction site compared to tooling made of steel, thereby increasing the service life of the tooling and reducing production costs.

[0036] In this embodiment, the workflow of the fixture for positioning the spacing of the reinforcing bars in the precast box girder contact wire foundation is as follows:

[0037] Step 1: According to the steel bar spacing and diameter required by the design drawings, precisely machine the groove 13 on the top of the slot plate 11 at a 1:1 scale, and verify the positional accuracy of the groove 13.

[0038] Step 2: Place this tooling stably on the bottom layer of the contact wire reinforcement, rotate the adjusting rod 24, and in conjunction with the scales of the first steel ruler 31 and the second steel ruler 32, simultaneously raise and lower the first telescopic component 2-1 and the second telescopic component 2-2 so that the bottom surface of the slot plate 11 is raised to the designed layer spacing height.

[0039] Step 3: Place the upper layer of steel bars one by one according to the position of groove 13, ensuring that the steel bars are completely inserted into the groove. Tie the steel bar nodes with tie wire. After the concrete is poured and cured, rotate the adjusting rod 24 to retract the X-shaped telescopic structure 23 to the initial height and remove the tooling.

[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire, characterized in that, include: Positioning component (1), the positioning component (1) includes a slot upright plate (11) and a slot bottom plate (12), the bottom of the slot upright plate (11) is fixedly connected to the slot bottom plate (12), and a plurality of grooves (13) are provided on the slot upright plate (11), all of the grooves (13) are distributed along the length direction of the slot upright plate (11); The lifting component (2) is fixedly connected to the bottom of the slot bottom plate (12) and the lifting component (2) is used to adjust the vertical height of the positioning component (1) relative to the bottom reinforcement of the precast box girder.

2. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 1, characterized in that: Each of the grooves (13) extends along the thickness direction of the slot plate (11), and the outline of each groove (13) matches the outer outline of the reinforcing bar to be positioned, so that the reinforcing bar to be positioned is engaged in the groove (13).

3. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 1, characterized in that: The lifting component (2) includes a first telescopic component (2-1) and a second telescopic component (2-2). The first telescopic component (2-1) is located on one side below the card slot base plate (12), and the second telescopic component (2-2) is located on the other side below the card slot base plate (12).

4. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 3, characterized in that: The first telescopic assembly (2-1) includes a top plate (21), a bottom plate (22), and an X-shaped telescopic structure (23). One end of the X-shaped telescopic structure (23) is connected to the first plate surface of the top plate (21), and the other end of the X-shaped telescopic structure (23) is connected to the bottom plate (22). The second plate surface of the top plate (21) is fixedly connected to the bottom of the slot bottom plate (12). The second plate surface of the top plate (21) is located on the side opposite to the first plate surface of the top plate (21).

5. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 4, characterized in that: The lifting component (2) also includes an adjusting rod (24), which is a threaded rod. The height of the X-shaped telescopic structure (23) can be controlled by rotating the adjusting rod (24).

6. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 3, characterized in that: The second telescopic component (2-2) has the same structure as the first telescopic component (2-1).

7. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 1, characterized in that: The fixture for positioning the spacing of the reinforcing bars of the precast box girder contact network foundation also includes a first steel ruler (31) and a second steel ruler (32). The first steel ruler (31) is detachably fixed to one side of the first telescopic component (2-1), and the second steel ruler (32) is detachably fixed to one side of the second telescopic component (2-2).

8. The fixture for positioning the spacing of reinforcing bars in the foundation of a precast box girder contact wire as described in claim 1, characterized in that: The card slot upright plate (11), card slot bottom plate (12) and lifting component (2) are all made of aluminum alloy.

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