Device for measuring ground flatness

Abstract

The utility model provides a device for measuring ground flatness, which comprises a guiding rule provided with a plurality of cavities, a telescopic unit is arranged in each cavity in a sliding fit manner, the telescopic unit comprises a movable rod capable of moving up and down, a reset spring is arranged between the cavity and the movable rod, and the reset spring is connected with the guiding rule. A lighting circuit is arranged at each cavity; when the bottom of the movable rod makes contact with the flat part of the ground, the lighting circuit forms an open circuit, and when the bottom of the movable rod makes contact with the uneven part of the ground, the lighting circuit forms a closed circuit. Through the cooperation of the telescopic unit and the lighting circuit, the device can simply, conveniently and clearly detect the uneven parts of the earth surface and the parts exceeding errors, and is high in detection efficiency. The ground flatness measuring device is simple to manufacture and convenient to use, accelerates the measuring speed of the ground flatness, further accelerates the progress of ground maintenance, saves the construction period, and is wide in application range.

Description

Technical Field

[0001] The utility model belongs to the technical field of ground flatness measurement, in particular to a device for ground flatness measurement. Background Art

[0002] In the field of construction engineering, whether it is the main structure board or the building decoration floor, the ground construction quality must be checked after the construction is completed. When checking the flatness of the ground, the traditional method is to measure it with a 2m ruler and a feeler gauge. The measurement process includes:

[0003] ① Ruler;

[0004] ② Check whether the gap between the ruler and the ground is too large;

[0005] ③ Use a feeler gauge to measure the location where there is a large gap between the ruler and the ground;

[0006] ④ Measure the feeler gauge and determine whether the error exceeds the standard.

[0007] The above measurement process is cumbersome and time-consuming. Checking the gap size and the feeler gauge reading is restricted by whether the indoor space has good lighting, resulting in slow measurement speed and labor-intensive.

[0008] Therefore, how to effectively solve the problem that the measurement process is cumbersome, time-consuming, labor-intensive, and affected by indoor lighting is a technical problem that needs to be solved urgently. Utility Model Content

[0009] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a device for measuring ground flatness, which solves the problems that the measuring process is complicated, time-consuming and labor-intensive, and is affected by indoor lighting.

[0010] The technical solution of this application is:

[0011] A device for measuring the flatness of the ground includes a ruler provided with a plurality of cavities, each of the cavities is slidably fitted with a telescopic unit, the telescopic unit includes a movable rod that moves up and down, a reset spring is provided between the cavity and the movable rod, and each of the cavities is provided with a lighting circuit; when the bottom of the movable rod contacts the flat part of the ground, the lighting circuit forms an open circuit, and when the bottom of the movable rod contacts the uneven part of the ground, the lighting circuit forms a passage. Through the cooperation of the telescopic unit and the lighting circuit, the uneven surface and the parts exceeding the error can be detected simply, conveniently and clearly, and the detection efficiency is high; it is simple to make and easy to use, which speeds up the measurement speed of the flatness of the ground, thereby speeding up the progress of ground maintenance and saving construction time; this device is not only suitable for the measurement of the flatness of cement mortar floors, but also suitable for the flatness measurement of most building ground projects, with a wide range of applications, and in line with the development trend of green construction in the construction industry, and the social benefits are very obvious.

[0012] Furthermore, the cavity is arranged along the vertical direction, and a plurality of the cavities are arranged at intervals along the length direction of the ruler.

[0013] Furthermore, a notch for placing the return spring is provided in the cavity, and the length of the notch is not greater than the length of the return spring in an extended state. When the surface is uneven, has protrusions, and the movable rod is pushed upward, the return spring is squeezed; when the surface is flat and has no protrusions, the return spring is stretched to keep the movable rod in the original set position.

[0014] Furthermore, a baffle is provided on the movable rod, the movable rod passes through the reset spring, and the baffle cooperates with the bottom plate of the ruler to prevent the movable rod from sliding out of the lower part of the cavity.

[0015] Furthermore, the lighting circuit includes a capacitor brush area arranged on the top of the cavity, and a metal clamp is sleeved on the top of the movable rod. When the metal clamp contacts the capacitor brush area, the light bulb connected in series with the cavity emits light.

[0016] Furthermore, a plurality of the light bulbs are arranged in parallel, and a plurality of the telescopic units are arranged in parallel.

[0017] Furthermore, a scale area is provided on the top of the movable rod, and the scales of the scale area increase sequentially from bottom to top.

[0018] Furthermore, the top and the bottom of the telescopic unit both protrude from the ruler.

[0019] Furthermore, the center distance between the telescopic units is no more than 20 mm, making the measurement more accurate.

[0020] Furthermore, the ruler is connected with a switch and a power supply. When the measurement work starts, the power supply and the switch are turned on to keep the light bulb on. When the power supply and the switch are not turned on, the light bulb is not on, so as to avoid wasting electricity when not in use.

[0021] The specific beneficial effects of the utility model include:

[0022] 1. Through the coordination of telescopic unit and lighting circuit, it is possible to detect uneven ground surface and parts exceeding the error simply, conveniently and clearly, with high detection efficiency;

[0023] 2. When the position exceeding the error is measured, the light bulb lights up, which is clear and conspicuous, not affected by indoor lighting, convenient and fast;

[0024] 3. Simple to make and easy to use, it speeds up the measurement of ground flatness, thereby speeding up the progress of ground maintenance and saving construction time;

[0025] 4. This device is not only suitable for the flatness measurement of cement mortar floors, but also for the flatness measurement of most building ground projects. It has a wide range of applications and is in line with the development trend of green construction in the construction industry. It has very obvious social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a perspective view of the utility model;

[0028] Figure 2 It is a side view of the utility model;

[0029] Figure 3 is a schematic diagram of a telescopic unit;

[0030] Figure 4 is a cross-sectional view of the telescopic unit;

[0031] Figure 5 is a schematic diagram of an active rod;

[0032] Figure 6 is a schematic diagram of the cavity;

[0033] Figure 7 It is a schematic diagram of the connection between the light bulb and the telescopic unit;

[0034] Figure 8 It is a schematic diagram when the movable rod is in contact with the flat part of the ground;

[0035] Fig. 9 It is a schematic diagram of the movable rod contacting the uneven part of the ground.

[0036] Description of Figure Numbers:

[0037] 1. Telescopic unit; 2. Ruler;

[0038] 3. Lighting circuit; 4. Light bulb;

[0039] 11. cavity; 111. capacitor brush area;

[0040] 12. movable rod; 121. scale area;

[0041] 13. Return spring; 14. Baffle; 15. Metal clamp;

[0042] 21. Switch; 22. Power supply. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] A device for measuring the flatness of a ground surface, such as Figure 1 , Figure 2 As shown, it includes a ruler 2 provided with a plurality of cavities 11, each of the cavities 11 is slidably matched with a telescopic unit 1, the telescopic unit 1 includes an active rod 12 that moves up and down, a reset spring 13 is provided between the cavity 11 and the active rod 12, and each of the cavities 11 is provided with a lighting circuit 3; when the bottom of the active rod 12 contacts the flat part of the ground, the lighting circuit 3 forms an open circuit, and when the bottom of the active rod 12 contacts the uneven part of the ground, the lighting circuit 3 forms a passage. Through the cooperation of the telescopic unit 1 and the lighting circuit 3, the uneven surface and the part exceeding the error can be detected simply, conveniently and clearly, and the detection efficiency is high; it is simple to make and easy to use, which speeds up the measurement speed of the ground flatness, thereby speeding up the progress of ground maintenance and saving construction time; the device is not only suitable for the measurement of the flatness of cement mortar floors, but also suitable for the flatness measurement of most building ground projects, with a wide range of applications, and in line with the development trend of green construction in the construction industry, and the social benefits are very obvious.

[0045] On the basis of the above embodiment, as a preferred embodiment, the cavity 11 is arranged along the vertical direction, and a plurality of the cavities 11 are arranged at intervals along the length direction of the ruler 2 .

[0046] On the basis of the above embodiment, as a preferred embodiment, a notch for accommodating the return spring 13 is provided in the cavity 11, and the length of the notch is not greater than the length of the return spring 13 in the extended state.

[0047] Specifically, the cavity 11 is cylindrical, the inner diameter of the lower half is larger than the inner diameter of the upper half, and a notch is arranged in the lower half of the cavity 11. The return spring 13 is vertically supported in the notch. When the surface is uneven and has protrusions and the movable rod 12 is pushed upward, the return spring 13 is squeezed. When the surface is flat and has no protrusions, the return spring 13 is stretched to keep the movable rod 12 in the original set position.

[0048] On the basis of the above embodiment, as a preferred embodiment, a baffle 14 is provided on the movable rod 12, the movable rod 12 passes through the reset spring 13, and the baffle 14 cooperates with the bottom plate of the ruler 2 to prevent the movable rod 12 from sliding out from the lower part of the cavity 11.

[0049] Specifically, the movable rod 12 is a plastic cylindrical rod with a diameter of 3 mm and a height of 75 mm. A cylindrical plastic baffle 14 with a diameter of 8 mm is provided 55 mm away from the lower end of the cylindrical rod.

[0050] On the basis of the above embodiment, as a preferred embodiment, the lighting circuit 3 includes a capacitance brush area 111 arranged at the top of the cavity 11, and a metal clamp 15 is sleeved on the top of the movable rod 12. When the metal clamp 15 contacts the capacitance brush area 111, the light bulb 4 connected in series with the cavity 11 emits light, and a plurality of the light bulbs 4 are arranged in parallel, and a plurality of the telescopic units 1 are arranged in parallel. When the position exceeding the error is measured, the light bulb 4 lights up, which is clear and conspicuous, not affected by indoor lighting, and convenient and quick.

[0051] On the basis of the above implementation manner, as a preferred implementation manner, the ruler 2 is connected with a switch 21 and a power supply 22. When the measurement work starts, the power supply and the switch are turned on to keep the light bulb 4 lit. When it is not turned on, the light bulb 4 is not lit to avoid wasting electricity when not in use.

[0052] Specifically, the wheelbase of the bulb 4 is 20 mm, matching each cavity 11, and arranged around each cavity 11; one end of the bulb 4 is connected to the cavity 11 with a wire, and the other end of the bulb 4 is connected to the power supply and switch with a wire, and each telescopic unit 1 working with the bulb is connected to the power supply 22 and the switch 21.

[0053] On the basis of the above embodiment, as a preferred embodiment, a scale area 121 is set on the top of the movable rod 12, and the scale area 121 increases from bottom to top. The movable rod 12 has a scale line with an accuracy of 1mm within the range of 5-25mm from the upper surface, and the end away from the upper surface of the movable rod 12 is the starting scale 0.

[0054] Based on the above implementation, as a preferred implementation, the top and the bottom of the telescopic unit 1 both protrude from the ruler 2 .

[0055] On the basis of the above implementation, as a preferred implementation, the center distance between the telescopic units 1 is no more than 20 mm, so that the measurement is more accurate.

[0056] The manufacturing method of the utility model is as follows:

[0057] 1. The size of the ruler 2 can be 200mm×25mm×54mm. Holes are opened on the upper and lower surfaces of the ruler 2 at a center distance of 20mm. The hole diameter on the upper surface is 6mm, and the hole diameter on the lower surface is 16mm. A bulb 4 is installed near the hole with a center distance of 20mm and a diameter of 6mm on the upper surface of the ruler;

[0058] 2. The movable rod 12 with a height of 75 mm and a scale is inserted into the reset spring 13, and then inserted from the lower part of the cavity 11. The metal clamp 15 is inserted into the upper end of the movable rod 12. The height of the metal clamp 15 can be adjusted according to the actual needs of the construction site. For example, if the flatness requirement of the construction site is 4 mm, the metal clamp 15 is inserted into the movable rod 12, and the capacitance brush area 111 is set within 5 mm from the top of the cavity 11;

[0059] 3. Each cavity 11 is connected in series with the bulb 4 through a wire, and then each telescopic unit 1 with a bulb is connected in parallel with the power supply. The lower surface of the ruler is polished smooth to ensure that the flatness of the lower surface of the ruler meets the accuracy requirements.

[0060] The principle of the utility model is as follows:

[0061] 1. When not in use, Figure 3 As shown, the lower end of the movable rod 12 extends out of the cavity 11, the metal clamp 15 contacts the capacitor brush area 111, and the light bulb 4 remains lit;

[0062] 2. In the use state, the ruler 2 is placed on the ground flatness test area, and the movable rod 12 pops up. When the ground is flat or the gap between the lower surface of the movable rod 12 and the ground does not exceed the allowable error range, the metal clamp 15 is disconnected from the capacitor brush area 111. Figure 8As shown, the bulb 4 is turned off; if there is a gap between the lower surface of the movable rod 12 and the ground, the movable rod 12 is pressed down, and the length of the movable rod 12 extending out of the cavity 11 exceeds the allowable error range, the metal clamp 15 and the capacitor brush area 111 are in contact again, such as Fig. 9 As shown, bulb 4 is on.

[0063] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0064] The above content shows and describes the basic principle, main features and beneficial effects of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for measuring ground flatness, characterized in that: The invention comprises a ruler (2) provided with a plurality of cavities (11), wherein a telescopic unit (1) is slidably fitted in each cavity (11), wherein the telescopic unit (1) comprises a movable rod (12) which moves up and down, and a return spring (13) is provided between the cavity (11) and the movable rod (12), and a lighting circuit (3) is provided at each cavity (11); when the bottom of the movable rod (12) contacts a flat part of the ground, the lighting circuit (3) forms an open circuit, and when the bottom of the movable rod (12) contacts an uneven part of the ground, the lighting circuit (3) forms a passage.

2. The device for measuring ground flatness according to claim 1, characterized in that: The cavity (11) is arranged along the vertical direction, and a plurality of the cavities (11) are arranged at intervals along the length direction of the ruler (2).

3. The device for measuring ground flatness according to claim 1 or 2, characterized in that: A notch for accommodating the return spring (13) is provided in the cavity (11), and the length of the notch is no greater than the length of the return spring (13) in an extended state.

4. The device for measuring ground flatness according to claim 1 or 2, characterized in that: A baffle (14) is provided on the movable rod (12), the movable rod (12) passes through the return spring (13), and the baffle (14) is engaged with the bottom plate of the ruler (2).

5. The device for measuring ground flatness according to claim 1 or 2, characterized in that: The lighting circuit (3) comprises a capacitor brush area (111) arranged at the top of the cavity (11); a metal clamp (15) is sleeved on the top of the movable rod (12); when the metal clamp (15) contacts the capacitor brush area (111), the light bulb (4) connected in series with the cavity (11) emits light.

6. The device for measuring ground flatness according to claim 5, characterized in that: A plurality of the light bulbs (4) are arranged in parallel, and a plurality of the telescopic units (1) are arranged in parallel.

7. The device for measuring ground flatness according to any one of claims 1 to 2 and 6, characterized in that: A scale area (121) is provided on the top of the movable rod (12), and the scale of the scale area (121) increases from bottom to top.

8. The device for measuring ground flatness according to any one of claims 1 to 2 and 6, characterized in that: The top and the bottom of the telescopic unit (1) both protrude from the ruler (2).

9. The device for measuring ground flatness according to any one of claims 1 to 2 and 6, characterized in that: The center distance between the telescopic units (1) is no greater than 20 mm.

10. The device for measuring ground flatness according to any one of claims 1 to 2 and 6, characterized in that: The ruler (2) is connected to a switch (21) and a power source (22).

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