A prefabricated box girder hole pressure grouting compactness detection tool

Abstract

The utility model relates to a hole detection technical field, concretely relates to a prefabricated box girder hole pressure grouting compactness detection frock, including detection block, the outer wall of detection block is installed with connecting cable, the outside of detection block is equipped with outer frame, the outside of outer frame exposes one side of sliding plate, and longitudinal two groups sliding plate are connected through contraction spring, one end of sliding rod is installed with clamping plate, the clamping surface of clamping plate is equipped with moving wheel, through forming "clamping - walking" integral type linkage between clamping mechanism and walking mechanism: when outer frame is pushed and pulled, moving wheel and rotating wheel roll simultaneously with the beam body surface cooperation, and the "micro - lift" mechanism that rotating wheel passes through damping wheel, pressing rod and cooperation board constitutes, instantaneous jacking detection block, makes detection surface to separate from the beam body, avoids sliding and scratches, after stopping pushing and pulling, spring support piece resets detection block gently and reattaches the point to be measured, and the whole process does not need to loosen clamping plate, realizes "clamping and walking simultaneously, and measures immediately after stopping".

Description

Technical Field

[0001] This utility model relates to the field of duct testing technology, specifically to a tooling for testing the grouting density of ducts in precast box girders. Background Technology

[0002] During the prefabrication of prestressed concrete box girders, the quality of grouting in the corrugated pipe ducts directly affects the durability and safety of the bridge, so it is necessary to test the grouting density.

[0003] A search revealed that Chinese utility model patent CN217212087U discloses a grouting density testing device. The device adjusts the limiting screw by rotating the handle. The limiting screw, combined with the limiting spring, enhances the clamping and holding properties of the device, thus increasing the ease of clamping and installation. Furthermore, the adjustable clamping properties between the limiting clamp and the connecting clamp increase the applicability of the device and expand its application range.

[0004] However, in actual use, once the detection device is fixed, it cannot be moved at will. The clamping needs to be removed before other holes in the precast box girder can be detected. When it is moved again, the detection device needs to be clamped and fixed again and adjusted, which makes the detection quite inconvenient. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a tooling for testing the grouting density of precast box girder ducts, which effectively solves the problem that the testing position cannot be adjusted arbitrarily in existing technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a tooling for testing the grouting density of precast box girder ducts, including,

[0008] A detection block, wherein a connecting cable is installed on the outer wall of the detection block;

[0009] The detection block is provided with an outer frame, through which four sets of sliding rods are installed. One end of each sliding rod is equipped with a sliding plate, one side of which protrudes from the outside of the outer frame. The two sets of sliding plates in the longitudinal direction are connected by a compression spring. One end of each sliding rod is equipped with a clamping plate, and the clamping surface of the clamping plate is provided with a movable wheel.

[0010] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, wherein: the upper and lower distributed slide rods are each equipped with clamps, and the two sets of clamps contact the top and bottom surfaces of the precast box girder respectively.

[0011] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, an L-shaped plate is installed on the top of the outer frame, a screw is installed on the bottom of the L-shaped plate, a movable block is threadedly connected to the screw, and the movable block is slidably connected to one side of the outer wall of the outer frame.

[0012] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, the top of the screw is connected to a rotating handle, a spring support is installed on one side of the outer wall of the moving block, and one end of the spring support is connected to the non-testing end of the testing block.

[0013] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, wherein: a set of support plates is installed on each of the two side walls of the outer frame, each set of support plates is connected to a rotating shaft via a bearing, the rotating shaft is fixedly connected to a rotating wheel, and the rotating wheel protrudes slightly from the vertical horizontal plane of the outer frame.

[0014] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, a damping wheel is installed at the top of the rotating shaft, and a pressing rod is installed on the outer ring of the damping wheel.

[0015] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, a limiting plate is provided on the support plate, and the limiting plate is located on one side of the pressing rod.

[0016] As a preferred embodiment of the grouting density testing fixture for precast box girder ducts described in this invention, the outer walls of both sides of the testing block are equipped with mating plates, which are located on one side of the pressing rod.

[0017] Beneficial effects

[0018] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0019] I. This utility model achieves an integrated "clamping-walking" linkage between the clamping mechanism and the walking mechanism: when the outer frame is pushed or pulled, the moving wheel and the rotating wheel simultaneously roll and cooperate with the beam surface. The rotating wheel, through the "micro-lifting" mechanism composed of the damping wheel, the pressing rod, and the mating plate, instantly lifts the detection block, causing the detection surface to detach from the beam and avoiding slippage and scratches. After the pushing and pulling stops, the spring support immediately and gently resets the detection block and re-attaches it to the test point. The entire process does not require loosening the clamping plate, realizing "clamping and moving simultaneously, stopping and testing immediately". Compared with the traditional method that requires repeated disassembly and assembly of clamps, the single-hole detection-transfer time is shortened by more than 60%, significantly improving the detection efficiency of batch box girders.

[0020] II. This utility model uses a bidirectional triggering structure with a mirrored arrangement of rotating wheels to ensure that no matter whether the outer frame moves to the left or right, one set of pressing rods is always pressed while the other set is locked by the limiting plate, forming a one-way drive-reverse check mechanism; the damping wheel has a built-in silicone oil damping plate to ensure that the pressing rod moves smoothly without rebound impact, thereby ensuring that the contraction amplitude of the detection block is constant each time, preventing the detection block from getting stuck due to overtravel and avoiding test errors caused by incomplete reset. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an overall tooling for testing the grouting density of precast box girder ducts.

[0023] Figure 2 This is a side view of a tool for testing the grouting density of precast box girder ducts.

[0024] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0025] Figure 4 This is a schematic diagram of a rotating wheel for testing the grouting density of precast box girder ducts.

[0026] Figure 5 This is a schematic diagram of a moving block for testing the grouting density of precast box girder ducts.

[0027] Reference numerals: 1. Detection block; 11. Cable; 2. Outer frame; 21. Slide rod; 22. Slide plate; 23. Retraction spring; 24. Clamping plate; 25. Moving wheel; 3. L-shaped plate; 31. Screw; 32. Rotating handle; 33. Moving block; 34. Spring support; 4. Support plate; 41. Rotating shaft; 42. Rotating wheel; 43. Damping wheel; 44. Limiting plate; 45. Pressing rod; 46. Mating plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] A tooling for testing the grouting density of precast box girder ducts, as shown in the attached document. Figure 1 - Figure 5 The system includes a detection block with connecting cables installed on its outer wall. An outer frame is provided around the detection block, through which four sets of sliding rods are installed. One end of each sliding rod has a sliding plate, with one side of the plate protruding from the outer frame. Two sets of sliding plates are connected longitudinally by a spring. One end of each sliding rod has a clamping plate, and the clamping surface of the clamping plate has a moving wheel. The moving wheel is a rubber-coated roller with its rim slightly protruding from the clamping plate surface, allowing it to continue rolling contact with the beam while clamped, reducing movement resistance. When the grouting density of the precast box girder's ducts needs to be tested, the upper and lower clamping plates are pulled, clamping the upper and lower surfaces of the precast box girder respectively, so that the detection block is positioned on one side of the corresponding duct.

[0031] Specifically, the upper and lower sliding rods are all equipped with clamps, and the two sets of clamps contact the top and bottom surfaces of the precast box girder, respectively.

[0032] Furthermore, an L-shaped plate is installed on the top of the outer frame, and a screw is installed on the bottom of the L-shaped plate. The screw is threadedly connected to a movable block, which is slidably connected to one side of the outer wall of the outer frame.

[0033] Furthermore, a rotating handle is connected to the top of the screw, and a spring support is installed on one side of the outer wall of the moving block. One end of the spring support is connected to the non-detection end of the detection block. The screw can be rotated by rotating the handle. The rotation of the screw drives the moving block, which adjusts the vertical position of the detection block so that the detection block can be aligned with the point to be detected.

[0034] Furthermore, a set of support plates is installed on each of the two side walls of the outer frame. Each set of support plates is connected to a rotating shaft via a bearing. The rotating shaft is fixedly connected to a rotating wheel. The rotating wheel protrudes slightly from the vertical horizontal plane of the outer frame. The outer ring of the rotating wheel is coated with polyurethane with a hardness of 80±5A, which is both wear-resistant and reduces movement noise.

[0035] Furthermore, a damping wheel is installed at the top of the rotating shaft, and a pressing rod is installed on the outer ring of the damping wheel.

[0036] Furthermore, a limit plate is provided on the support plate, and the limit plate is located on one side of the pressing rod.

[0037] Furthermore, mating plates are installed on both outer walls of the detection block. The mating plates are located on one side of the pressing rod. During movement, the rotating wheel contacts the outer wall of the precast box girder, causing the rotating wheel to rotate. The rotation of the rotating wheel drives the rotating shaft to rotate, which in turn drives the damping wheel to rotate. The damping wheel then moves the pressing rod, which presses against the mating plate. This pressure on the mating plate causes the detection block to move, resulting in a slight contraction of the detection block. This prevents the detection contact surface of the detection block from contacting the outer wall of the precast box girder during movement, thus avoiding damage to the detection block. Moreover, the rotating wheel is mirrored on both sides of the detection block, ensuring that regardless of the direction of rotation, there is always a set of rotating wheels that can drive the pressing rod to press against the mating plate.

[0038] Working Principle: When testing the grouting density of ducts in a precast box girder, pull the upper and lower clamping plates to clamp them onto the top and bottom surfaces of the precast box girder, respectively. This positions the test block on one side of the corresponding duct. Rotating the handle rotates the screw, which in turn moves the moving block, adjusting its position so that it is aligned with the test point. During clamping, the outer wall of the outer frame on the testing end is kept as close as possible to the precast box girder, ensuring the rotating wheel contacts the outer wall. The spring support ensures the testing contact surface of the test block is in contact with the outer wall of the precast box girder. This completes the fixing of the test block and allows for density testing. To change its position, simply move the outer frame. The moving wheel facilitates easy movement of the outer frame within the precast box girder. The device moves on the precast box girder. During movement, the rotating wheel contacts the outer wall of the precast box girder, causing the rotating wheel to rotate. The rotation of the rotating wheel drives the rotating shaft to rotate, which in turn drives the damping wheel to rotate. The damping wheel then moves the pressing rod, which presses against the mating plate. This pressure on the mating plate causes the detection block to move, resulting in a slight contraction of the detection block. This prevents the detection contact surface of the detection block from contacting the outer wall of the precast box girder during movement, thus avoiding damage to the detection block. Furthermore, the rotating wheel is mirrored on both sides of the detection block, ensuring that regardless of the direction of rotation, one set of rotating wheels can drive the pressing rod to press against the mating plate, while the other set is restricted by the limiting plate to maintain the position of the pressing rod. This structure allows the detection device to move on the precast box girder at any time, making the detection more convenient.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tooling for testing the grouting density of precast box girder ducts, characterized in that, include, The detection block (1) has a connecting cable (11) installed on its outer wall; The detection block (1) is provided with an outer frame (2), and four sets of slide rods (21) are installed through the outer frame (2). A slide plate (22) is installed at one end of the slide rod (21). One side of the slide plate (22) is exposed outside the outer frame (2), and the two sets of slide plates (22) in the longitudinal direction are connected by a contraction spring (23). A clamping plate (24) is installed at one end of the slide rod (21), and the clamping surface of the clamping plate (24) is provided with a moving wheel (25).

2. The fixture for testing the grouting density of precast box girder ducts according to claim 1, characterized in that, The sliding rods (21) distributed vertically are each equipped with clamps (24), and the two sets of clamps (24) contact the top and bottom surfaces of the precast box girder respectively.

3. The fixture for testing the grouting density of precast box girder ducts according to claim 2, characterized in that, An L-shaped plate (3) is installed on the top of the outer frame (2), and a screw (31) is installed on the bottom of the L-shaped plate (3). The screw (31) is threadedly connected to a moving block (33), which is slidably connected to one side of the outer wall of the outer frame (2).

4. The fixture for testing the grouting density of precast box girder ducts according to claim 3, characterized in that, A rotating handle (32) is connected to the top of the screw (31), and a spring support (34) is installed on one side of the outer wall of the moving block (33). One end of the spring support (34) is connected to the non-detection end of the detection block (1).

5. The fixture for testing the grouting density of precast box girder ducts according to claim 4, characterized in that, The outer frame (2) has a set of support plates (4) installed on each of its two side walls. Each set of support plates (4) is connected to a rotating shaft (41) via a bearing. The rotating shaft (41) is fixedly connected to a rotating wheel (42), which is slightly protruding from the vertical horizontal plane of the outer frame (2).

6. The fixture for testing the grouting density of precast box girder ducts according to claim 5, characterized in that, A damping wheel (43) is installed at the top of the rotating shaft (41), and a pressing rod (45) is installed on the outer ring of the damping wheel (43).

7. The fixture for testing the grouting density of precast box girder ducts according to claim 6, characterized in that, A limiting plate (44) is provided on the support plate (4), and the limiting plate (44) is located on one side of the pressing rod (45).

8. The fixture for testing the grouting density of precast box girder ducts according to claim 7, characterized in that, Both sides of the outer wall of the detection block (1) are fitted with mating plates (46), which are located on one side of the pressing rod (45).

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