Simple detector for surface flatness of prefabricated slab

Abstract

The utility model discloses a simple detector for the surface flatness of a precast slab, which relates to the technical field of detection devices and comprises a movable frame, and the movable frame comprises supporting legs and a transverse plate. A mounting rack and a detection roller; the swing plate is connected to the mounting frame, and a through groove allowing the swing plate to freely pass through is formed in the transverse plate; the fixing block is fixedly connected to the transverse plate, a dial indicator is arranged on the fixing block in a penetrating mode, and the end of a detection rod of the dial indicator is connected with the surface of the swing plate in an abutting mode. When the movable frame moves, the detection roller is in contact with the upward surface of the prefabricated plate, and when the surface of the prefabricated plate is uneven, the detection roller rotates around the hinged part of the transverse plate and enables the swing plate to swing, so that the end part of the detection rod of the dial indicator generates linear motion along with the swing of the swing plate; a pointer of the dial indicator swings correspondingly, and a worker judges the inclination degree of the detection roller according to the swing range of the pointer of the dial indicator, so that the flatness degree of the surface of the prefabricated slab is judged.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically a simple detector for the surface flatness of a precast slab. Background Technology

[0002] Precast slabs are floor slabs used in early 20th-century construction; they are modular components or panels used in engineering projects. Because they are precast concrete components manufactured and processed in a prefabrication plant and then transported directly to the construction site for installation, they are called precast slabs. To make precast slabs, a hollow model is first made by nailing wooden boards together. Reinforcing steel bars are then placed in the hollow parts of the model, and cement is poured into the hollow parts. After drying, the wooden boards are removed, leaving the precast slab.

[0003] During the acceptance of building construction, construction workers need to test the flatness of the surface of precast slabs. The current method for testing the flatness of precast slab surfaces is for workers to place a level on the surface of the precast slab and observe whether the bubble in the level is in the exact center of the level to determine whether the flatness of the precast slab surface meets the standard. This method requires the bubble in the level to stabilize before it can be observed accurately, which takes a long time and results in low testing efficiency.

[0004] Therefore, this application proposes a simple detector for the surface flatness of precast slabs. Utility Model Content

[0005] The purpose of this invention is to provide a simple detector for the surface flatness of precast slabs to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A simple surface flatness detector for precast slabs includes:

[0008] A movable frame, the movable frame including two legs and a cross plate fixed to the top of the two legs;

[0009] Mounting frame, which is hinged to the bottom of the horizontal plate, and a detection roller is horizontally rotatably connected to the mounting frame;

[0010] A swing plate is connected to the mounting frame, and the horizontal plate has a through groove for the swing plate to swing freely.

[0011] A fixed block is fixed to the horizontal plate, and a dial indicator is installed on the fixed block. The end of the measuring rod of the dial indicator is in contact with the surface of the swing plate.

[0012] Furthermore, multiple rollers are installed at the bottom of the outrigger.

[0013] Furthermore, the cross plate is fixedly connected to a handle.

[0014] Furthermore, a spring is vertically installed between the horizontal plate and the mounting bracket, with the two ends of the spring in the direction of its elastic force fixed to the opposite surfaces of the horizontal plate and the mounting bracket, respectively.

[0015] Furthermore, the bottom of the horizontal plate and the top surface of the mounting bracket are fixedly connected with positioning pins, and the two ends of the spring are respectively wrapped around two adjacent positioning pins.

[0016] Furthermore, a fixed arm is fixedly connected to the bottom of the horizontal plate, a rotating arm is rotatably connected to the fixed arm, the upper surface of the mounting bracket is fixedly connected to the rotating arm, and the swing plate is fixedly connected to the rotating arm.

[0017] Furthermore, a crossbar is fixedly connected to the rotating arm, and a mounting column is vertically fixed to the end of the crossbar away from the rotating arm, with a scraper connected to the lower end of the mounting column.

[0018] Furthermore, a ball head is fixed to the top of the scraper, and a slot is provided at the bottom of the mounting post for the ball head to rotate and be fitted.

[0019] Furthermore, a stop bar is vertically fixed to the top of the scraper, and a fixing plate is rotatably sleeved on the mounting column. The fixing plate has an arc-shaped groove for the upper end of the stop bar to pass freely, and the center of the arc of the arc-shaped groove is coaxial with the mounting column.

[0020] Furthermore, an annular protrusion is fixedly connected to the upper surface of the fixing plate, and a spiral spring is installed inside the annular protrusion. The two ends of the spiral spring are respectively fixed to the inner wall of the annular protrusion and the outer wall of the mounting column.

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

[0022] This utility model uses a mounting frame and a detection roller. When the moving frame moves, the detection roller contacts the upward side of the precast slab. When the surface of the precast slab is uneven, the detection roller will rotate around its hinge point on the horizontal plate, causing the swing plate to swing. This causes the end of the dial indicator's detection rod to move linearly with the swing plate, causing the dial indicator's pointer to swing accordingly. The operator can then determine the degree of tilt of the detection roller based on the range of the dial indicator's pointer swing, thereby determining the flatness of the precast slab surface.

[0023] This invention features a scraper that, as the moving frame moves, can pre-scrape away foreign objects on the surface of the precast slab that the detection roller contacts, thus preventing foreign objects from contacting the detection roller, causing it to swing, and affecting the accuracy of the detection.

[0024] This invention features a stop bar and an arc-shaped groove. The stop bar swings within the arc-shaped groove, allowing the scraper to deflect on a horizontal plane. This deflection helps the scraper remove foreign objects from the surface of the precast slab, preventing it from experiencing excessive resistance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a simple detector for the surface flatness of a precast slab according to the present invention;

[0026] Figure 2 for Figure 1 A side view diagram of the mid-structure;

[0027] Figure 3 for Figure 1 A top-view diagram of the mid-structure;

[0028] Figure 4 for Figure 3 Enlarged schematic diagram of a local structure at point A;

[0029] Figure 5 This is a schematic diagram of the assembled structure of the mounting frame, rotating arm, and swing plate in this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the fixing plate in this utility model.

[0031] The following are explanations of the reference numerals in the figures: 1. Scraper; 2. Detection roller; 3. Support leg; 4. Mounting bracket; 5. Rotating arm; 6. Dial indicator; 7. Fixing block; 8. Swing plate; 9. Horizontal plate; 10. Spring; 11. Fixing arm; 12. Crossbar; 13. Mounting column; 14. Through groove; 15. Stop bar; 16. Arc groove; 17. Fixing plate; 18. Annular protrusion; 19. Spiral spring; 20. Positioning pin; 21. Slot. Detailed Implementation

[0032] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1-6This utility model provides a technical solution: a simple detector for the surface flatness of a precast slab, including a movable frame, the movable frame including two support legs 3 and a horizontal plate 9 fixed to the top of the two support legs 3, multiple rollers installed at the bottom of the support legs 3, a handle fixedly connected to the horizontal plate 9, a fixed arm 11 fixedly connected to the bottom of the horizontal plate 9, a rotating arm 5 rotatably connected to the fixed arm 11, a mounting frame 4 fixedly connected to the lower end of the rotating arm 5, the outer contour of the mounting frame 4 is U-shaped, and its upper surface is fixedly connected to the lower end of the rotating arm 5, each of the two side plates of the mounting frame 4 is fitted with a bearing, and a detection roller 2 is connected to the two bearings through a mounting shaft, the axial direction of the detection roller 2 is parallel to the width direction of the precast slab, a swing plate 8 is fixedly connected to the rotating arm 5, the horizontal plate 9 has a through groove 14 for the swing plate 8 to swing freely, a fixed block 7 is fixedly connected to the horizontal plate 9, and a dial indicator 6 is inserted through the fixed block 7, the end of the detection rod of the dial indicator 6 is in contact with the surface of the swing plate 8;

[0034] The precast slab to be tested is placed on a flat surface, and the moving frame straddles the precast slab. Pushing the handle causes the moving frame to move on the flat surface and along the length of the precast slab. During the movement, the testing roller 2 will contact the upward-facing side of the precast slab. When the surface of the precast slab is uneven (mainly uneven in the width direction), the testing roller 2, being in contact with the surface of the precast slab, will rotate around the pivot point of the rotating arm 5 on the fixed arm 11. During the rotation, the swing plate 8 will swing. During the swing, the testing rod of the dial indicator 6 will contact the surface of the swing plate 8 and move linearly with the swing plate 8, causing the pointer of the dial indicator 6 to rotate. By observing the direction and range of the pointer swing, the flatness of the precast slab surface can be determined.

[0035] In addition, a spring 10 is vertically installed between the horizontal plate 9 and the mounting frame 4. Furthermore, two springs 10 are provided, and they are respectively located on both sides of the length direction of the mounting frame 4. The two ends of the spring 10 in the elastic direction are respectively fixed to the opposite surfaces of the horizontal plate 9 and the mounting frame 4. The bottom of the horizontal plate 9 and the top surface of the mounting frame 4 are fixedly connected to the positioning pins 20. The two ends of the spring 10 are respectively wrapped around the two adjacent positioning pins 20. Through the elastic abutment of the spring 10 against the mounting frame 4, the detection roller 2 can be maintained in the initial state. Figure 1 The state is that it is in a horizontal state;

[0036] A crossbar 12 is fixed to one side of the outer wall of the rotating arm 5. A mounting column 13 is vertically fixed to the end of the crossbar 12 away from the rotating arm 5. A scraper 1 is connected to the lower end of the mounting column 13. The longitudinal section of the scraper 1 is a right trapezoidal shape, and its tip faces the forward direction of the moving frame. A ball head is fixed to the top of the scraper 1. A slot 21 for the ball head to be rotated and fitted is opened at the bottom of the mounting column 13. A stop bar 15 is vertically fixed to the top of the scraper 1. A fixing plate 17 is rotatably sleeved on the mounting column 13. An arc groove 16 is opened on the fixing plate 17 for the upper end of the stop bar 15 to pass freely. The arc center of the arc groove 16 is coaxial with the mounting column 13. An annular protrusion 18 is fixed to the upper surface of the fixing plate 17. A spiral spring 19 is installed in the annular protrusion 18. The two ends of the spiral spring 19 are fixed to the inner wall of the annular protrusion 18 and the outer wall of the mounting column 13, respectively.

[0037] As the moving frame moves, the bottom surface of scraper 1 contacts the surface of the precast slab. The tip of scraper 1 can scoop up foreign objects on the surface of the precast slab. When the foreign object is in close contact with the surface of the precast slab, the scraper 1 experiences greater resistance when it comes into contact with the foreign object, which causes the scraper 1 to swing horizontally. This causes the stop rod 15 to swing within the arc groove 16. When the amplitude of the scraper 1 swings is large, the stop rod 15 swings to one end of the arc length direction of the arc groove 16, which will drive the fixed plate 17 to rotate. This causes the fixed plate 17 to rotate around the axial direction of the mounting column 13, and causes the spiral spring 19 to contract or expand, thereby accumulating elastic potential energy. After the foreign object is scooped up by scraper 1, the elastic potential energy of the spiral spring 19 is released, thereby driving the fixed plate 17 to return to its original position.

[0038] The working principle of this utility model is as follows: The precast slab to be tested is placed on a plane, and the moving frame is straddled on the precast slab. Pushing the handle causes the moving frame to move on the plane and along the length of the precast slab. During the movement, the detection roller 2 will contact the upward side of the precast slab. When the surface of the precast slab is uneven (mainly uneven in the width direction), the detection roller 2, being in contact with the surface of the precast slab, will rotate around the pivot point of the rotating arm 5 on the fixed arm 11. During the rotation, the swing plate 8 will swing. During the swing, the detection rod of the dial indicator 6 will contact the surface of the swing plate 8 and move linearly with the swing plate 8, causing the pointer of the dial indicator 6 to rotate. By observing the swing direction and swing range of the pointer, the flatness of the precast slab surface can be determined.

[0039] As the moving frame moves, the bottom surface of scraper 1 contacts the surface of the precast slab. The tip of scraper 1 can scoop up foreign objects on the surface of the precast slab. When the foreign object is in close contact with the surface of the precast slab, the scraper 1 experiences greater resistance when it comes into contact with the foreign object, which causes the scraper 1 to swing horizontally. This causes the stop rod 15 to swing within the arc groove 16. When the amplitude of the scraper 1 swings is large, the stop rod 15 swings to one end of the arc length direction of the arc groove 16, which will drive the fixed plate 17 to rotate. This causes the fixed plate 17 to rotate around the axial direction of the mounting column 13, and causes the spiral spring 19 to contract or expand, thereby accumulating elastic potential energy. After the foreign object is scooped up by scraper 1, the elastic potential energy of the spiral spring 19 is released, thereby driving the fixed plate 17 to return to its original position.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple detector for the surface flatness of a precast slab, characterized in that, include: The mobile frame includes two legs (3) and a cross plate (9) fixed to the top of the two legs (3); Mounting frame (4), which is hinged to the bottom of the horizontal plate (9), and a detection roller (2) is horizontally rotatably connected to the mounting frame (4); A swing plate (8) is connected to the mounting bracket (4), and the horizontal plate (9) has a through groove (14) for the swing plate (8) to swing freely. A fixing block (7) is fixed to the horizontal plate (9), and a dial indicator (6) is provided on the fixing block (7). The end of the measuring rod of the dial indicator (6) is in contact with the surface of the swing plate (8).

2. The simplified surface flatness detector for precast slabs according to claim 1, characterized in that, The bottom of the support leg (3) is equipped with multiple rollers.

3. The simplified surface flatness detector for precast slabs according to claim 1, characterized in that, The horizontal plate (9) is fixedly connected to a handle.

4. The simplified surface flatness detector for precast slabs according to claim 1, characterized in that, A spring (10) is vertically installed between the horizontal plate (9) and the mounting bracket (4), with the two ends of the spring (10) in the direction of elastic force fixed to the opposite surfaces of the horizontal plate (9) and the mounting bracket (4).

5. The simplified surface flatness detector for precast slabs according to claim 4, characterized in that, The bottom of the horizontal plate (9) and the top surface of the mounting bracket (4) are fixedly connected with positioning pins (20), and the two ends of the spring (10) are respectively wrapped around the two adjacent positioning pins (20).

6. The simplified surface flatness detector for precast slabs according to claim 1, characterized in that, A fixed arm (11) is fixedly connected to the bottom of the horizontal plate (9), and a rotating arm (5) is rotatably connected to the fixed arm (11). The upper surface of the mounting bracket (4) is fixedly connected to the rotating arm (5), and the swing plate (8) is fixedly connected to the rotating arm (5).

7. The simplified surface flatness detector for precast slabs according to claim 6, characterized in that, The rotating arm (5) is fixedly connected to a crossbar (12), and a mounting post (13) is vertically fixedly connected to one end of the crossbar (12) away from the rotating arm (5). A scraper (1) is connected to the lower end of the mounting post (13).

8. The simplified surface flatness detector for precast slabs according to claim 7, characterized in that, The scraper (1) has a ball head fixed to its top, and the mounting post (13) has a slot (21) at its bottom for the ball head to rotate and be fitted.

9. The simplified surface flatness detector for precast slabs according to claim 8, characterized in that, A stop bar (15) is vertically fixed to the top of the scraper (1), and a fixing plate (17) is rotatably sleeved on the mounting column (13). The fixing plate (17) has an arc-shaped groove (16) for the upper end of the stop bar (15) to pass freely. The center of the arc-shaped groove (16) is coaxial with the mounting column (13).

10. The simplified surface flatness detector for precast slabs according to claim 9, characterized in that, An annular protrusion (18) is fixedly connected to the upper surface of the fixing plate (17). A spiral spring (19) is installed inside the annular protrusion (18). The two ends of the spiral spring (19) are respectively fixed to the inner wall of the annular protrusion (18) and the outer wall of the mounting column (13).

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