Drill depth measuring scale

Abstract

The utility model discloses a kind of drilling depth measuring scales, including vertically arranged rectangular ruler plate, middle part is opened with front and rear through vertical sliding slot along height direction, sliding block is slidably arranged in vertical sliding slot, sliding block is connected with the hole detection rod that slides along vertical sliding slot vertically, the lower end of hole detection rod is the detection end that passes out rectangular ruler plate lower end surface;The front side of sliding block is fixedly connected with the horizontal tab that is flush with the upper end of hole detection rod, a pair of height limit racks are symmetrically arranged on the front plate surface of rectangular ruler plate located at the left and right sides of vertical sliding slot, horizontal tab is located between two height limit racks, two height limit racks are used to clamp the two ends of horizontal tab, limit horizontal tab translation up and down.The utility model is characterized in that it is easy to measure drilling depth, measurement flexibility is strong, not affected by construction site dust, convenient for mass drilling measurement, measurement speed is fast, save manpower, reduce labor intensity, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a drilling depth measuring ruler. Background Technology

[0002] In building construction, the masonry work of secondary structures requires extensive drilling and rebar installation. The drilling depth must be precise. Shallow holes will result in rebar installation that does not meet specifications and insufficient anchoring force, posing safety hazards to the overall structure. Excessive holes will cause unnecessary damage to the structure, waste rebar adhesive, prolong its curing time, increase construction difficulty, and affect the construction schedule.

[0003] Traditional measuring tools are difficult to use for accurate measurements inside small boreholes and cannot meet the high-intensity requirements of large-scale borehole measurements. While existing digital depth gauges offer precise measurement capabilities, their measurement speed is slow, and these sophisticated instruments are susceptible to dust at the construction site, which can reduce their accuracy and even damage the instrument. Summary of the Invention

[0004] The purpose of this utility model is to provide a drilling depth measuring ruler to address the shortcomings of existing technologies.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution:

[0006] The drilling depth measuring ruler of this utility model includes a vertically arranged rectangular ruler plate. A vertical groove running through the middle of the rectangular ruler plate along its height direction is formed. A slider is slidably arranged in the vertical groove. A probe rod that slides vertically along the vertical groove is connected to the slider. The lower end of the probe rod is a probe end that passes through the lower end face of the rectangular ruler plate. A horizontal lever flush with the upper end of the probe rod is fixed to the front side of the slider. A pair of height limiting racks are symmetrically arranged on the front plate surface of the rectangular ruler plate on the left and right sides of the vertical groove. The horizontal lever is located between the two height limiting racks. The two height limiting racks are used to block the two ends of the horizontal lever and limit the vertical translation of the horizontal lever.

[0007] Furthermore, the rear plate of the rectangular ruler is provided with a first scale mark that matches the vertical slide groove. The scale value of the first scale mark gradually increases from top to bottom, which can quickly measure the length of the probe rod extending downward according to the height of the horizontal lever on the slider. In addition, a horizontal pointer pointing to the first scale mark can be fixed to the rear side of the slider. The horizontal pointer is flush with the horizontal lever, so that the scale value can be directly indicated on the first scale mark by the horizontal pointer.

[0008] Furthermore, the probe end of the probe rod is provided with a probe head for fitting and pressing against the bottom of the borehole. The lower surface of the probe head is a planar structure to facilitate stable contact with the bottom of the borehole and improve measurement accuracy.

[0009] Furthermore, a handle is provided at the center of the upper end face of the rectangular ruler plate to facilitate lifting and transferring the rectangular ruler plate.

[0010] Furthermore, leveling support arms can be hinged to the lower ends of the left and right edges of the rectangular ruler. The leveling support arms have a retracted state where they rotate upwards and remain parallel to the vertical slide groove, and an extended state where they rotate downwards and remain flush with the lower end face of the rectangular ruler. A leveling screw is screwed through the leveling support arm. One end of the leveling screw is fixedly connected to a leveling foot, and the other end is fixedly connected to a screw head. When the leveling support arm is in the extended state, the leveling screw remains vertical. At this time, the leveling foot is located at the lower end of the leveling screw, which is used to stably support it on the ground around the borehole, while the screw head is located at the upper end of the leveling screw, which is convenient for adjusting the height of the leveling screw.

[0011] Furthermore, the screwing head is a cylindrical end coaxially fixed to the end of the leveling screw, and anti-slip protrusions are evenly distributed along the circumference on the outer side wall of the screwing head, which can increase the friction when gripping the screwing head.

[0012] Furthermore, a second scale mark should be set on the leveling screw along its length. The scale value of the second scale mark gradually increases from bottom to top, which can easily measure the height of the lower surface of the leveling support arm in the unfolded state from the ground.

[0013] Furthermore, an air bubble level should be installed on the upper surface of the rectangular ruler to facilitate accurate calibration of whether the lower surface of the rectangular ruler is level.

[0014] The advantages of this invention are that by pushing the slider downwards, the probe rod can be inserted into the borehole, thereby easily measuring the borehole depth. It offers high measurement flexibility, is unaffected by dust at the construction site, facilitates large-scale borehole measurements, has a fast measurement speed, saves manpower, reduces labor intensity, and improves work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 yes Figure 1 Rear view.

[0017] Figure 3 yes Figure 1 A bottom view.

[0018] Figure 4 yes Figure 1A magnified view of the right side of the middle slider.

[0019] Figure 5 yes Figure 4 Top view.

[0020] Figure 6 yes Figure 1 Usage status diagram. Detailed Implementation

[0021] 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.

[0022] like Figure 1-3 As shown, the drilling depth measuring ruler of this utility model includes a vertically arranged rectangular ruler plate 1. The rectangular ruler plate 1 has a height of 170mm, a width of 58mm, and a thickness of 10mm. A vertical groove 2 is formed in the middle of the rectangular ruler plate 1 along its height direction, running from the front surface to the rear surface. A slider 3 is slidably disposed in the vertical groove 2. Since the vertical groove 2 is a vertical channel running from front to back, the slider 3 should be composed of a front block 3.1 located on the front side of the vertical groove 2 and a rear block 3.2 located on the rear side of the vertical groove 2, connected by a connecting part 3.3 that fits across the vertical groove 2 (e.g., ...). Figure 4 , 5 As shown in the figure, this allows the entire slider 3 to be securely mounted on the vertical slide groove 2, and also to slide up and down along the vertical slide groove 2.

[0023] A probe rod 4 located in the vertical groove 2 is connected to the lower surface of the connecting part 3.3 in the middle of the slider 3. The probe rod 4 can slide vertically up and down along the vertical groove 2 under the action of the slider 3. The lower end of the probe rod 4 is a probe end that passes through the lower end face of the rectangular ruler 1. In order to ensure that the probe end can be stably pressed against the bottom of the borehole when measuring the borehole depth, the probe end of the probe rod 4 is provided with a probe head 5 for fitting and pressing against the bottom of the borehole. The lower surface of the probe head 5 is a planar structure, which can improve the measurement accuracy. When the slider 3 slides upward to the initial position at the uppermost end of the vertical groove 2, the probe rod 4 is exactly located inside the vertical groove 2, and only the probe head 5 at the lower end of the probe rod 4 is outside the rectangular ruler 1. At the same time, the upper surface of the probe head 5 is also in contact with the lower end face of the rectangular ruler 1. At this time, a first scale mark 6 corresponding to the vertical slide groove 2 is also provided on the back plate surface of the rectangular ruler plate 1. The scale value of the first scale mark 6 gradually increases from top to bottom, and the length of the probe rod 4 extending downward can be quickly obtained according to the height of the slider 3 moving downward, thereby measuring the drilling depth.

[0024] A horizontal lever 7, flush with the upper end of the probe rod 4, is fixedly connected to the lower surface of the front block 3.1 on the front side of the slider 3. A pair of height limiting racks 8 are symmetrically arranged on the front plate of the rectangular ruler 1 located on the left and right sides of the vertical slide groove 2. Both height limiting racks 8 are vertically arranged, and their evenly distributed limiting teeth face each other, thus forming a vertical height limiting channel between them. At this time, the horizontal lever 7 is exactly located in the height limiting channel between the two height limiting racks 8, and the limiting teeth on the two height limiting racks 8 block the two ends of the horizontal lever 7, restricting the horizontal lever 7 from moving up and down, so that the horizontal lever 7 can rise or fall evenly step by step. In addition, a horizontal pointer 16 pointing to the first scale mark 6 can be fixedly connected to the lower surface of the rear block 3.2 on the rear side of the slider 3. The horizontal pointer 16 is flush with the horizontal lever 7, so that the scale value can be directly indicated on the first scale mark 6 through the horizontal pointer 16, which is convenient for direct reading of the value.

[0025] Furthermore, to facilitate the lifting and transfer of the rectangular ruler 1, a semi-circular handle 9 is provided at the center of the upper end face of the rectangular ruler 1. A leveling support arm 10 can also be hinged to the lower ends of the left and right edges of the rectangular ruler 1. The two leveling support arms 10 are symmetrical and each has an upward rotating, parallel-to-the-vertical-slide-groove-2 retracted state, and a downward rotating, flush-to-the-lower-end face of the rectangular ruler 1 unfolded state (e.g., ...). Figure 6 (As shown in the diagram). Additionally, a leveling screw 11 is screwed onto each leveling support arm 10. One end of the leveling screw 11 is fixedly connected to a leveling foot 12, and the other end is fixedly connected to a screw head 13. The leveling foot 12 and screw head 13 are located on opposite sides of the leveling support arm 10. The screw head 13 is a cylindrical end coaxially fixed to the end of the leveling screw 11, with anti-slip protrusions evenly distributed along its outer side wall to increase friction when gripping the screw head 13. Alternatively, the outer side wall of the screw head 13 can be designed as an anti-slip rough surface to increase friction. When the leveling support arm 10 is in the extended state, the leveling screw 11 remains vertical. At this time, the leveling foot 12 is located at the lower end of the leveling screw 11, providing stable support to the ground around the borehole, while the screw head 13 is located at the upper end of the leveling screw 11, facilitating height adjustment by rotating the leveling screw 11.

[0026] In addition, a second scale mark 14 is provided along the length direction on the leveling screw 11. The second scale mark 14 is embedded in the rod wall of the leveling screw 11 and will not affect its screw connection with the leveling support arm 10. The scale value of the second scale mark 14 gradually increases from bottom to top, which can easily measure the vertical height of the lower surface of the leveling support arm 10 from the ground when it is in the unfolded state. At the same time, a bubble level tube 15 should be provided on the upper end face of the rectangular ruler 1 to facilitate the calibration of whether the lower end face of the rectangular ruler 1 is kept horizontal.

[0027] In use, simply align the lower end of the probe rod 4 with the borehole, then push the slider 3 downwards to insert the probe rod 4 into the borehole until the probe head 5 at the lower end touches the bottom of the borehole. At this point, the downward height of the slider 3 can be directly read on the first scale mark 6. Adding this to the height of the probe head 5 itself gives the accurate depth of the borehole (of course, the first scale mark 6 can directly include the height of the probe head 5). This method easily completes the measurement of borehole depth, offering high measurement flexibility, is unaffected by dust at the construction site, facilitates large-scale borehole measurements, is fast, saves manpower, reduces labor intensity, and improves work efficiency.

[0028] like Figure 6 As shown, when the flatness around the borehole is poor or the borehole is skewed, the leveling support arm 10 can be rotated to make it unfolded, and then the leveling screw 11 can be adjusted and the leveling can be ensured by the bubble level tube 15. At this time, the probe rod 4 is inserted into the borehole to measure the depth. The borehole depth can be obtained by subtracting the downward adjustment height of the leveling screw 11 from the measured extension length of the probe rod 4.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

Claims

1. A drilling depth measuring ruler, characterized in that: The device includes a vertically oriented rectangular ruler plate. A vertical groove running through the middle of the ruler plate along its height direction is formed. A slider is slidably mounted within the groove. A probe rod, which slides vertically along the groove, is connected to the slider. The lower end of the probe rod extends through the lower surface of the rectangular ruler plate. A horizontal lever, flush with the upper end of the probe rod, is fixed to the front of the slider. A pair of height-limiting racks are symmetrically arranged on the front surface of the rectangular ruler plate on both sides of the vertical groove. The horizontal lever is located between the two height-limiting racks, which are used to lock the two ends of the horizontal lever and restrict its vertical movement.

2. The borehole depth measuring ruler according to claim 1, characterized in that: The back plate of the rectangular ruler is provided with a first scale mark that matches the vertical slide groove, and a horizontal pointer pointing to the first scale mark is fixed to the back side of the slider. The horizontal pointer is flush with the horizontal lever.

3. The borehole depth measuring ruler according to claim 1, characterized in that: The probe end of the probe rod is provided with a probe head for fitting against the bottom of the borehole, and the lower surface of the probe head is a planar structure.

4. The borehole depth measuring ruler according to claim 1, characterized in that: A handle is provided at the center of the upper end face of the rectangular ruler.

5. The borehole depth measuring ruler according to claim 1, characterized in that: A leveling support arm is hinged to the lower end of the left and right edges of the rectangular ruler. The leveling support arm has a retracted state where it rotates upward and remains parallel to the vertical slide groove, and an extended state where it rotates downward and remains flush with the lower end surface of the rectangular ruler. A leveling screw is screwed through the leveling support arm. One end of the leveling screw is fixedly connected to a leveling foot, and the other end is fixedly connected to a screw head.

6. The borehole depth measuring ruler according to claim 5, characterized in that: The screw head is a cylindrical end coaxially fixed to the end of the leveling screw, and anti-slip protrusions are evenly distributed along the circumference on the outer side wall of the screw head.

7. The borehole depth measuring ruler according to claim 5, characterized in that: A second scale mark is provided on the leveling screw along its length.

8. The borehole depth measuring ruler according to claim 5, characterized in that: An air bubble level is provided on the upper surface of the rectangular ruler.

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