Prefabricated shear wall flatness inspection ruler and inspection method

Abstract

The present invention provides a flatness inspection ruler for precast shear walls, which includes an inspection ruler body, a measuring needle and a vertical rod. Vertical rods are respectively installed at both ends of the inspection ruler body, and the inspection ruler body can be adjusted to any height along the column. The characteristics are as follows: An observation window is opened on the front side plate of the inspection ruler body, sliding grooves are provided on the upper side plate and the lower side plate, the measuring needle is vertically installed in the sliding groove, the bottom of the measuring needle extends towards the surface of the structure to be measured, a pointer is provided on the part of the measuring needle between the upper side plate and the lower side plate, springs are provided between the pointer and the upper side plate, and springs are provided between the pointer and the lower side plate. The springs above and below the pointer are the same. A detection method for the above flatness inspection ruler for precast shear walls is also provided. The precast component to be detected is placed on the production tabletop, and the inspection ruler straddles both sides of the component; the inspection ruler is moved to move the measuring needle to the horizontal line where the detection point is located; by comparing the scales of the vertical rods on both sides, ensure that the inspection ruler body is parallel to the production tabletop; horizontally move the position of the measuring needle along the inspection ruler body, and observe the position of the measuring needle relative to the wall surface layer to achieve the detection of the flatness of the surface layer.

Description

Technical Field

[0001] The present invention relates to a detection technology for the surface flatness of precast shear walls. Background Art

[0002] In the production process of precast shear wall components, the flat casting construction method is adopted. After the concrete is poured, the upper surface is leveled by using a screed bar to closely adhere to the top of the formwork around the component and scrape it flat from one side to the other, and then plastered and polished. It is found in the construction that during the leveling process, due to the small stiffness of the aluminum alloy screed bar and the continuous accumulation of concrete in the middle during the translation of the screed bar, the middle of the screed bar is pushed up and arched, resulting in bulging in the middle when the wall is finally formed; furthermore, due to some residual hardened concrete on the top surface of the formwork around the component, when the screed bar moves along the top surface of the formwork to the residual part, the up and down bumps will also cause uneven finishing. If this construction defect cannot be corrected in time during the construction period, the precast shear wall will be unqualified during the acceptance, and the finishing of this kind of wall is not good, which affects the appearance and construction accuracy. Summary of the Invention

[0003] Aiming at the problem that bulging is likely to occur in the middle during the construction of precast walls in the prior art, the present invention provides a detection device for the surface flatness of precast walls, which can detect the bulging position during the construction period, facilitating timely correction by construction workers.

[0004] To achieve the above invention purpose, the specific technical solution adopted by the present invention is:

[0005] A flatness detection ruler for precast shear walls includes a detection ruler body, a probe needle and a vertical rod. A vertical rod is installed at each end of the detection ruler body, and the detection ruler body can be adjusted to any height along the vertical rod; an observation window is opened on the front side plate of the detection ruler body, sliding grooves are provided on the upper side plate and the lower side plate, the probe needle is vertically installed in the sliding grooves, the bottom of the probe needle extends towards the surface of the structure to be measured, and a pointer is provided on the part of the probe needle between the upper side plate and the lower side plate. Springs are provided between the pointer and the upper side plate, and springs are provided between the pointer and the lower side plate. The springs above and below the pointer are the same.

[0006] The wall surface layer flatness detection tool provided by the present invention uses the probe needle to horizontally translate on the surface of the component, and judges the bulging or depression of the shear wall surface layer through the height change of its pointer. It is convenient to use and can effectively detect the flatness of the wall surface, providing a favorable reference for construction workers during construction.

[0007] The preferred scheme of this detection ruler is:

[0008] A pointer displacement scale is provided inside the detection ruler body, and its zero point is the position indicated by the pointer when there is no pressure on the upper and lower springs of the pointer. Positive readings are set upward based on the zero point, and negative readings are set downward.

[0009] The pointer displacement scale is provided on the rear side plate of the detection ruler. The scale can more clearly show the change of the pointer and indicate the amount of change.

[0010] A glass plate is installed on the observation window, and pointer positioning shift scales are engraved on the glass plate. The scale is designed to be in the front, making the reading clearer.

[0011] The detection ruler body is composed of a left ruler rod and a right ruler rod combined. The left ruler rod extends into the right ruler rod, and a telescopic convex point for positioning is provided at the inner end of the left ruler rod. The telescopic structure formed by the cooperation of the two ruler rods makes the structure of the present invention more flexible and has stronger applicability. The convex point structure makes the structure of the two ruler rods more stable.

[0012] Vertical rod perforations are provided at the left and right ends of the upper and lower side plates of the detection ruler body. The vertical rods are installed in the vertical rod perforations, and positioning knobs for fixing the height of the detection ruler on the column are also provided on the end faces at both ends of the detection ruler.

[0013] Scales are marked on the vertical rods, and the scales on the two side vertical rods are synchronized. The scales on the vertical rods facilitate adjusting the consistency of the heights at both ends of the detection ruler body and ensure the level of the detection ruler body.

[0014] The present invention also provides a detection method for the above detection ruler, which is carried out according to the following steps:

[0015] First, select the part of the precast component to be detected, and place the assembled detection ruler across both sides of the component on the production tabletop;

[0016] Second, move the magnetic attraction position of the vertical rod base to longitudinally move the whole detection ruler, and move the ruler measuring needle to the horizontal line where the detection point is located;

[0017] Third, compare the scales on the two side vertical rods and adjust the up and down position of the detection ruler body to ensure that the detection ruler body is parallel to the production tabletop;

[0018] Finally, horizontally move the position of the measuring needle along the detection ruler body. When the bottom tip of the measuring needle contacts the raised part of the wall surface at the measuring point, the pointer moves up, and the reading is positive; when the bottom tip of the measuring needle contacts the flat part of the wall surface at the measuring point and there is no sinking when pressing the top of the measuring needle, the pointer does not move, and the reading is 0; when the measuring needle is located in the sunken part of the measured wall surface and its bottom tip is suspended directly above the sunken part, and the top of the measuring needle sinks when pressed, the pointer has a negative reading.

[0019] In the above method, the operation of moving the measuring needle is specifically as follows: hold the handle at the top of the measuring needle, pull out the thicker part of the cross-section of the measuring needle from the positioning hole, and then horizontally push the measuring needle along the chute to move, observing the contact situation between the tip of the measuring needle and the surface of the component.

[0020] This method has many measurement points, fast measurement speed, can distinguish the convex or concave of the wall surface layer, and the measurement is accurate. Brief Description of the Drawings

[0021] Figure 1 Structural diagram of this detection ruler;

[0022] Figure 2 This is the top view structural diagram of the detection ruler;

[0023] Figure 3 Improved structural diagram for the stylus;

[0024] Figure 4 Improved structural diagram for detecting ruler body;

[0025] Figure 5 To detect the state of depressions in the wall surface layer;

[0026] Figure 6 To detect the state of the raised part of the wall surface;

[0027] Figure 7 To detect the flatness and position status of the wall surface.

[0028] In the figure: detection ruler body 1, measuring needle 2, vertical pole 3, positioning knob 4, observation window 5, spring 6, pointer 7, magnetic base 8, vertical pole through hole 9, slide groove 10, positioning hole 11, pointer positioning scale 12, wall surface layer 13, production table 14. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below. The present invention provides a prefabricated shear wall flatness detection ruler, such as Figure 1-2 As shown, it comprises a detection ruler body 1, a measuring needle 2 and a vertical pole 3. A vertical pole 3 is respectively installed at both ends of the detection ruler body, and the detection ruler can adjust the height along the vertical pole 3 at will; an observation window 5 is formed on the front side plate of the detection ruler body 1, and a slide groove 10 is arranged on the upper side plate and the lower side plate. The measuring needle 2 is vertically installed in the slide groove 10, and the bottom of the measuring needle extends toward the surface direction of the measured structure. The portion of the measuring needle 2 between the upper side plate and the lower side plate is provided with a pointer 7, and a spring 6 is arranged between the upper side of the pointer 7 and the upper side plate, and a spring 6 is arranged between the lower side of the pointer 7 and the lower side plate, and the upper and lower springs of the pointer are the same.

[0030] This structure uses a probe 2 to move horizontally on the surface of the structure. The bulging or depression of the shear wall layer is judged by the height change of the pointer. It is easy to use and can effectively check the flatness of the wall surface, providing a favorable reference for construction workers.

[0031] The specific structure of the detection ruler is described below in conjunction with the accompanying drawings. The accompanying drawings only show a specific example of the present invention, and the structure of each specific position shown in the drawings is only one form provided by the present invention, and does not represent all the solutions of the present invention. Therefore, it cannot be used as a limitation of the present invention.

[0032] The main components of the present invention include a detection ruler body 1, a measuring needle 2 and a vertical pole 3. The vertical pole 3 provides height support for the detection ruler body 1. The measuring needle 2 moves along the detection ruler body 1. The bottom of the measuring needle 2 detects the flatness of the shear wall surface layer. If there is bulging in the shear wall surface layer, it will be transmitted to the construction personnel through the change of the pointer height.

[0033] Detection ruler body:

[0034] The detection ruler body 1 designed in the present invention is in the structure of a box body. An observation window is opened on its front side plate, and sliding grooves 10 are provided on the upper side plate and the lower side plate. The sliding grooves 10 are used to install the measuring needle 2 and allow the measuring needle to translate.

[0035] A number of positioning holes 11 can be arranged along the sliding groove 10. The diameter of the positioning holes 11 is of course larger than that of the sliding groove 10 to determine a fixed point for the measuring needle 2. The more the number of the positioning holes 11, the more and denser detection points there will be for detecting the shear wall plane accordingly.

[0036] There is a pointer displacement scale 12 corresponding to each positioning hole 11 of the detection ruler body 1, and the pointer displacement scale 12 is arranged on the rear side plate of the detection ruler. When the height of the pointer 2 changes, the relative position between the pointer 7 and the pointer displacement scale 12 is directly observed through the observation. In this structure, the scale is specifically designed on the inner surface of the rear side plate. The scale can more clearly show the change of the pointer and indicate the amount of the change. When the bottom of the measuring needle of the present invention has no bulging, the pointer 7 remains at a certain height. When bulging is detected and the bottom is pushed upward, the pointer moves upward. The pointer displacement scale positions the position of the measuring needle 2 without force as 0 degree, and 5 - 10 scales are respectively extended upward and downward based on 0 degree. The pointer displacement scale 12 can also be arranged on other structures as long as it is convenient to observe in cooperation with the pointer. Further, the pointer displacement scale 12 is arranged on a glass plate, and the glass plate is fixedly connected to the observation window 5 of the front side plate. In this scheme, the scale design is forward, and the reading is clearer.

[0037] As Figure 4 shown, as a structural deformation of the detection ruler body, the detection ruler body is composed of a left ruler rod and a right ruler rod. The left ruler rod extends into the right ruler rod, and there are telescopic convex points inside the left ruler rod. The telescopic structure makes the structure of the present invention more flexible and more applicable, and the convex point structure makes the structure of the two ruler rods more stable.

[0038] Column:

[0039] The column is a long rod body. The present invention provides a simple installation structure for the column and the detection ruler body: As shown in Figure 2 , 3 shown, at the left and right ends of the upper and lower side plates of the detection ruler body 1, there are vertical rod through holes 9, and the vertical rod 3 is installed in the vertical rod through holes 9. Positioning knobs 4 are arranged on the end faces at both ends of the detection ruler. The positioning knobs 4 are used to fix the height of the detection ruler 1 on the vertical rod 3. Scales are marked on the vertical rod 3 as a reference for the heights at both ends of the detection ruler body to ensure the level of the detection ruler body.

[0040] The shear wall is placed on the formwork for inspection. A magnetic base 8 is provided at the bottom of the vertical pole, and the magnetic base 8 attracts the formwork. The suction force of the magnetic base ensures the stability of the inspection ruler during use and does not hinder the movement of the inspection ruler. Therefore, its magnetism can be provided by a permanent magnet block with appropriate suction force or by an electromagnet.

[0041] Probe:

[0042] The probe 2 of the present invention can be a straight probe rod as Figure 1 shown. The part of the probe in the inspection ruler body is fixedly connected with a pointer. The pointer is positioned at a certain height in a hovering state through a spring 6, allowing displacement under upper-side pressure and allowing displacement under lower-side pressure. The probe 2 pauses at any position along the sliding groove 10. However, this structure has no limit in the direction of the sliding groove, and the probe is unstable.

[0043] The improvement solution provided by the present invention is as follows: as Figure 3 shown, the part of the probe 2 installed with the inspection ruler body is designed as a funnel structure. The pointer is arranged at the middle waist 22 of the funnel structure. A plurality of positioning holes are uniformly arranged along the sliding groove on the inspection ruler body. The sliding groove matches the size of the middle waist of the funnel structure, and the positioning holes match the upper hopper body 23 and the lower hopper body 21 of the funnel structure. In this solution, the part below the lower hopper body is still a relatively thin needle body. The height of the lower hopper body of the probe should be noted to meet the lifting stroke of the probe. When the waist of the funnel structure is lifted to the height of the upper sliding groove, the lower hopper body enters between the upper and lower side plates.

[0044] To facilitate the movement of the probe, a lifting handle 24 is provided at the top of the probe.

[0045] When the detection point on the wall surface layer protrudes and touches the probe, the probe will naturally move upward. (2) When the detection point on the surface layer is sunken, it is necessary to press down the probe so that its end just touches the lowest point of the depression. In this way, the flatness deviation value can be read through the scale indicating needle connected to the probe.

[0046] The use process of this inspection ruler is combined with Figures 5-7 as follows:

[0047] First, select the part of the precast component to be inspected, and place the assembled inspection ruler across both sides of the component on the production table 14;

[0048] Second step, move the magnetic suction position of the vertical pole base to longitudinally move the whole inspection ruler, and move the probe of the ruler to the horizontal line where the detection point is located;

[0049] Third step, compare the scales on both sides of the vertical poles, and adjust the up and down positions of the inspection ruler body to ensure that the inspection ruler body is parallel to the production table 14;

[0050] Finally, horizontally move the position of the measuring needle along the detection ruler body. When the bottom tip of the measuring needle 2 contacts the convex part of the wall surface layer 13 at the measurement point, the pointer moves upward, showing a positive reading; when the bottom tip of the measuring needle 2 contacts the flat part of the wall surface layer 13 at the measurement point and there is no sinking when pressing the top of the measuring needle, the pointer does not move, showing a reading of 0; when the measuring needle 2 is located in the concave part of the measured wall surface layer 13 and its bottom tip point hangs directly above the concave part, and the top of the measuring needle sinks when pressed, the pointer shows a negative reading.

[0051] Reading instructions:

[0052] (1) Fine-tune the height of the detection ruler body until the bottom tip of the measuring needle contacts the measurement point (the convex part of the wall surface layer), then the pointer moves upward, showing a positive reading.

[0053] (2) When the bottom tip of the measuring needle just contacts the measurement point (the flat part of the wall surface layer) and there is no sinking when pressing the top of the measuring needle, the pointer does not move, showing a reading of 0.

[0054] (3) When the bottom tip of the measuring needle is directly above the measurement point (the concave part of the wall surface layer) and the top of the measuring needle sinks when pressed, the pointer shows a negative reading.

[0055] The detection ruler and measurement method provided by the present invention can effectively detect the flatness of the wall surface layer, judge the bulging or depression of the shear wall surface layer through the height change of its pointer, have many detection points, accurate readings, convenient use, and can effectively detect the flatness of the wall surface, providing a favorable reference for construction workers during construction.

Claims

1. A flatness detection ruler for precast shear walls, comprising a detection ruler body, a measuring needle and a vertical rod. A vertical rod is installed at each end of the detection ruler body, and the detection ruler body can be adjusted to any height along the vertical rod. Its characteristics are: The detection ruler body is a box structure. An observation window is opened on the front side plate, and sliding grooves are provided on the upper side plate and the lower side plate. A number of positioning holes are arranged along the sliding grooves, and the diameter of the positioning holes is larger than that of the sliding grooves. The measuring needle is vertically installed in the sliding groove, and the bottom of the measuring needle extends towards the surface of the structure to be measured. A pointer is provided on the part of the measuring needle between the upper side plate and the lower side plate. Springs are respectively arranged between the pointer and the upper side plate and the lower side plate, and the upper and lower springs are the same. The part of the measuring needle between the upper side plate and the lower side plate is designed as a funnel structure. The pointer is arranged at the middle waist of the funnel structure. The sliding groove matches the size of the middle waist of the funnel structure, and the positioning holes match the upper hopper body and the lower hopper body of the funnel structure. The part below the lower hopper body is a thin needle body. The height of the lower hopper body of the measuring needle satisfies the lifting stroke of the measuring needle. When the waist of the funnel structure is lifted to the height of the upper sliding groove, the lower hopper body enters between the upper side plate and the lower side plate.

2. The flatness detection ruler for precast shear walls according to claim 1, Its characteristics are: A pointer positioning displacement scale is provided corresponding to each positioning hole in the detection ruler body. Its zero point is the position indicated by the pointer when there is no pressure on the upper and lower springs of the pointer. Positive readings are set upwards based on the zero point, and negative readings are set downwards.

3. The flatness detection ruler for precast shear walls according to claim 2, Its characteristics are: The pointer positioning displacement scale is provided on the rear side plate of the detection ruler.

4. The flatness detection ruler for precast shear walls according to claim 2, Its characteristics are: A glass plate is installed on the observation window, and the pointer positioning displacement scale is printed on the glass plate.

5. The flatness detection ruler for precast shear walls according to claim 1, Its characteristics are: The detection ruler body is composed of a left ruler rod and a right ruler rod. The left ruler rod extends into the right ruler rod, and a telescopic convex point for positioning is provided at the inner end of the left ruler rod.

6. The flatness detection ruler for precast shear walls according to claim 1, Its characteristics are: Vertical rod through holes are provided at the left and right ends of the upper and lower side plates of the detection ruler body. The vertical rod is installed in the vertical rod through holes, and positioning knobs for fixing the height of the detection ruler on the vertical rod are also provided on the end faces of both ends of the detection ruler.

7. The flatness detection ruler for precast shear walls according to claim 1, Its characteristics are: Scales are marked on the vertical rod, and the scales on both side vertical rods are synchronized.

8. The detection method of the flatness detection ruler for precast shear walls according to any one of claims 1 - 7 is carried out according to the following steps: First, select the part of the precast component to be detected, and place the assembled detection ruler across both sides of the component on the production tabletop; Second step, move the magnetic attraction position of the vertical rod base to longitudinally move the whole detection ruler, and move the ruler measuring needle to the horizontal line where the detection point is located; Third step, compare the scales on both side vertical rods, and adjust the up and down position of the detection ruler body to ensure that the detection ruler body is parallel to the production tabletop; Fourth step, the part below the lower hopper body is a thin needle body. Hold the handle at the top of the measuring needle, lift the middle waist of the funnel structure to the height of the upper sliding groove, the lower hopper body enters between the upper side plate and the lower side plate, and then horizontally push the measuring needle along the sliding groove to move, and release it at the positioning hole corresponding to the detection point. Finally, when the bottom tip of the measuring needle contacts the raised part of the wall surface at the measurement point, the pointer moves upward, showing a positive reading; when the bottom tip of the measuring needle contacts the flat part of the wall surface at the measurement point and there is no sinking when pressing the top of the measuring needle, the pointer remains stationary, showing a reading of 0; when the measuring needle is located in the sunken part of the wall surface being measured and its bottom tip point hangs directly above the sunken part, the top of the measuring needle sinks when pressed, and the pointer shows a negative reading.

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