A downhole digital display drilling detection tool

Abstract

The utility model provides an underground digital display drilling detection tool, which belongs to the field of drilling detection technology, and solves the problems of long detection time, large result error, and inconvenient tool use in traditional drilling detection methods. The utility model includes a measuring rod and a connecting rod. The measuring rod is a hollow structure with slots on both sides. A guide rod is arranged inside the measuring rod, and a distance measuring device is sleeved on the guide rod. Two upper rods are rotatably arranged at one end of the guide rod, and two lower rods are rotatably arranged on the distance measuring device. The two upper rods and the lower rod are relatively distributed on both sides of the measuring rod. The upper rod and the lower rod are rotatably connected one by one, and the upper rod and the lower rod can extend out of the slot. A shell is arranged at the bottom of the measuring rod, and the connecting rod is arranged in the shell and connected by a loading thread. The other end of the guide rod penetrates into the connecting rod, and the distance measuring device contacts the top of the connecting rod. The utility model is simple and convenient to use, can greatly reduce the detection cost, shorten the detection time, improve the accuracy and operation efficiency of drilling detection, and improve the production efficiency of the mine.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling detection, and in particular relates to an underground digital display drilling detection tool. Background Art

[0002] With the development of mining technology, the production capacity of mines has been continuously improved, and the efficiency of anchor support is crucial. Before the installation of anchors, it is usually necessary to inspect and accept parameters such as drilling depth and diameter. Whether the support depth is in place is one of the main factors to ensure the quality of support.

[0003] In order to facilitate detection and save time, tape measures, laser rangefinders, wooden sticks and other tools are commonly used to detect boreholes, which have disadvantages such as long detection time, large error in results, and inconvenient use of tools. Especially in areas with complex rock conditions, the rock mass on the inner wall of the borehole is broken, and commonly used measuring tools cannot accurately measure the borehole, making detection difficult and unable to obtain effective detection results, which in turn affects the subsequent normal production of the mine. Utility Model Content

[0004] The utility model aims to provide an underground digital display drilling detection tool to solve the problems of long detection time, large result error and inconvenient tool use in traditional drilling detection methods.

[0005] The technical scheme of the utility model is: an underground digital display drilling detection tool, comprising a measuring rod and a connecting rod, the measuring rod is a hollow structure with grooves on both sides, a guide rod is arranged inside the measuring rod, a distance measuring device is sleeved on the guide rod, two upper rods are rotatably arranged at one end of the guide rod, two lower rods are rotatably arranged on the distance measuring device, the two upper rods and the lower rod are relatively distributed on both sides of the measuring rod, the upper rods and the lower rods are rotatably connected in a one-to-one manner, the upper rods and the lower rods can extend out of the grooves, a shell is arranged at the bottom of the measuring rod, the connecting rod is arranged in the shell and is connected by a loading thread, the other end of the guide rod penetrates into the connecting rod, and the distance measuring device contacts with the top end of the connecting rod.

[0006] As a further improvement of the utility model, it further comprises a plurality of main rods, wherein the plurality of main rods are connected in sequence through threads, and the main rods at the ends are connected to the connecting rods through threads.

[0007] As a further improvement of the utility model, the distance measuring device is a displacement sensor, the distance measuring device is connected to the digital display board through a wire, and the digital display board extends out of the main rod.

[0008] As a further improvement of the utility model, a top plate is provided on the top of the measuring rod, and a plurality of limit columns are evenly distributed on the top plate.

[0009] The beneficial effects of the utility model are as follows: the rotating main rod drives the connecting rod to push the distance measuring device to move on the guide rod, and when moving, the connection between the upper rod and the lower rod is driven to contact the inner wall of the borehole. At this time, the displacement distance of the distance measuring device can be obtained, and the aperture size of the borehole can be calculated by a formula. The depth of the measured borehole can be calculated by the cumulative length formula of the connecting rod, the measuring rod and the main rod.

[0010] The utility model is simple and convenient to use, can greatly reduce the detection cost, shorten the detection time, improve the accuracy and operation efficiency of drilling detection, and thus improve the mine production efficiency.

[0011] The utility model can realize the concrete, digital and mechanization of drilling detection, and provides a high-efficiency measuring tool for future drilling detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the overall structure of the utility model;

[0013] Figure 2 It is a top view of the structure of the utility model;

[0014] Figure 3 It is a structural diagram of the main rod in the utility model;

[0015] Figure 4 It is a cross-sectional view of the utility model in use state;

[0016] Figure 5 The schematic diagram of the method for measuring the borehole diameter using the utility model;

[0017] Figure 6 The utility model is a schematic diagram of a method for measuring drilling depth.

[0018] In the figure: 1-measuring rod; 11-limiting column; 121-top plate; 122-shell; 13-guide rod; 141-upper rod; 142-lower rod; 151-distance measuring device; 152-conducting wire; 153-digital display board; 2-connecting rod; 21-loading thread; 3-main rod; 4-drilling hole; 5-thread. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1-Figure 3As shown, a downhole digital display drilling detection tool comprises a measuring rod 1 and a connecting rod 2. The measuring rod 1 is an I-shaped hollow structure with grooves on both sides. A guide rod 13 is arranged inside the measuring rod 1. A distance measuring device 151 is sleeved on the guide rod 13. Two upper rods 141 are rotatably arranged at one end of the guide rod 13. Two lower rods 142 are rotatably arranged on the distance measuring device 151. The two upper rods 141 and the lower rod 142 are relatively distributed on both sides of the measuring rod 1. The upper rods 141 and the lower rods 142 are rotatably connected in a one-to-one manner. The upper rods 141 and the lower rods 142 can extend out of the grooves. A shell 122 is arranged at the bottom of the measuring rod 1. The connecting rod 2 is arranged in the shell 122 and is connected by a loading thread 21. The other end of the guide rod 13 penetrates into the connecting rod 2, and the distance measuring device 151 contacts the top of the connecting rod 2.

[0021] It also includes a plurality of main rods 3 , which are connected in sequence via threads 5 , and the main rods 3 at the ends are connected to the connecting rods 2 via threads 5 .

[0022] Specifically, internal threads and external threads are respectively provided at both ends of the main rod 3, the connecting rod 2 is provided with an external thread at the end opposite to the loading thread 21, the end of the connecting rod 2 provided with the external thread is connected to the end of the end main rod 3 provided with the internal thread, and the end of the main rod 3 provided with the external thread is connected in sequence to the end of the adjacent main rod 3 provided with the internal thread; multiple main rods 3 connected in sequence by internal threads and external threads can increase the use effect of the device, adapt to use with drilling holes 4 of different depths, and are convenient and flexible to disassemble and assemble.

[0023] The distance measuring device 151 is a displacement sensor, and the distance measuring device 151 is connected to a digital display board 153 through a wire 152 , and the digital display board 153 extends out of the main rod 3 .

[0024] The measuring mechanism is composed of a distance measuring device 151, a wire 152 and a digital display board 153. The wire 152 passes through the guide rod 13 and extends to the outside of the connecting rod 2 and the last main rod 3. The upper end of the upper rod 141 is connected to the upper part of the guide rod 13 by bolts. The distance measuring device 151 is rectangular as a whole, with a cylindrical groove in the middle. It is connected to the end of the lower rod 142 by bolts to form a whole, and is placed on the lower part of the guide rod 13 to form an openable and closable parallelogram structure.

[0025] A top plate 121 is provided on the top of the measuring rod 1, and a plurality of limit columns 11 are evenly distributed on the top plate 121; specifically: two limit columns 11 are evenly distributed on both sides of the upper surface of the top plate 121, which are fixed by welding to form a whole, and the guide rod 13 is cylindrical and hollow inside, and is fixed to the lower part of the top plate 121 by welding to form a whole; the setting of the limit columns 11 in contact with the bottom of the borehole 4 can improve the measurement accuracy of the device, while avoiding wear caused by the contact between the measuring rod 1 and the bottom hole wall of the borehole 4, thereby extending the service life.

[0026] The whole parts of the device are made of steel plates with certain strength and plasticity, so as to ensure the stability of the drilling 4 detection tool.

[0027] According to the Pythagorean theorem and the cumulative formula, a calculation formula for measuring the diameter and depth of the borehole 4 by the device is obtained, and the calculation process is simple, practical and highly accurate.

[0028] like Figure 4-Figure 6 As shown, a method for using a downhole digital display drilling detection tool comprises the following steps:

[0029] Step 1: Connect the measuring rod 1, the connecting rod 2 and the main rod 3 in sequence, connect the distance measuring device 151 to the digital display board 153 through the wire 152 and reset the data to zero;

[0030] Step 2: Place the measuring rod 1 in the borehole 4, so that the limit column 11 abuts against the bottom of the borehole 4, rotate the main rod 3 to drive the connecting rod 2 to screw into the housing 122, and push the distance measuring device 151 to move on the guide rod 13, and the distance measuring device 151 drives the angle between the upper rod 141 and the lower rod 142 to change and expand outward, so that the connection between the upper rod 141 and the lower rod 142 abuts against the inner wall of the borehole 4;

[0031] Step 3: At this time, the data obtained on the digital display board 153 is the moving distance of the distance measuring device 151. The diameter of the borehole 4 is calculated based on the moving distance of the distance measuring device 151, and the depth of the borehole 4 is calculated based on the cumulative length of the connecting rod 2, the measuring rod 1 and the main rod 3.

[0032] The diameter of the drill hole 4 is calculated using the following formula:

[0033]

[0034] Where: Dx is the diameter of the borehole; a is the length of the lower rod; L is the length of the guide rod; ∆L is the moving distance of the distance measuring device.

[0035] The drilling depth is calculated using the following formula:

[0036] Hx=H1+(n+1)H2-Δh1+Δh2+H3-n∙Δh3

[0037] Among them: Hx is the drilling depth; H1 is the length from the limit column to the shell; H2 is the length of the connecting rod; H3 is the length of the main rod outside the face; ∆h1 is the length of the loading thread; ∆h2 is the length of the unconnected loading thread; ∆h3 is the length of the connecting thread between the connecting rod and the main rod; n is the number of main rods set.

[0038] The borehole 4 is generally located at the two sides and the top of the tunnel. First, observe the rock conditions around the borehole 4 at the face, and check whether there is sediment in the borehole 4. If there is sediment, clean the borehole 4 at the face to clean the sediment in the borehole 4; check whether the borehole 4 is intact after cleaning. If it is intact, prepare to test the depth and diameter of the borehole 4 at the face, connect the measuring rod 1 and the connecting rod 2, and place them at the mouth of the borehole 4 to be tested for standby;

[0039] If the hole 4 is deeper, multiple main rods 3 are connected to the connecting rod 2, and the measuring rod 1 is placed at the bottom of the borehole 4 using several main rods 3, so that the limit column 11 contacts the bottom of the borehole 4; at the same time, the distance measuring device 151 is connected to the digital display board 153 by connecting several sections of wires 152 in series; the digital display board 153 is powered on and the data is reset to zero, the main rod 3 is rotated to drive the connecting rod 2 to screw into the housing 122 under the action of the loading thread 21, and the distance measuring device 151 is pushed to move on the guide rod 13, and the distance measuring device 151 drives the angle between the upper rod 141 and the lower rod 142 to change and expand outward, so that the connection between the upper rod 141 and the lower rod 142 is against the inner wall of the borehole 4, and the data on the digital display board 153 is the distance the distance measuring device 151 moves on the guide rod 13, and then the diameter of the borehole 4 is calculated.

[0040] After the measurement is completed, the main rod 3 is rotated to make the upper rod 141 and the lower rod 142 retract inward, and several main rods 3, connecting rods 2 and measuring rods 1 are taken out. The cumulative length of the main rod 3, connecting rod 2 and measuring rod 1 is calculated according to the formula. The calculated length is the same as the depth of the measured borehole 4.

Claims

1. A downhole digital display drilling detection tool, characterized in that: The invention comprises a measuring rod (1) and a connecting rod (2), wherein the measuring rod (1) is of a hollow structure and has grooves on both sides, a guide rod (13) is provided inside the measuring rod (1), a distance measuring device (151) is sleeved on the guide rod (13), two upper rods (141) are rotatably provided on one end of the guide rod (13), two lower rods (142) are rotatably provided on the distance measuring device (151), the two upper rods (141) and the lower rods (142) are relatively distributed on both sides of the measuring rod (1), the upper rods (141) and the lower rods (142) are rotatably connected in a one-to-one manner, the upper rods (141) and the lower rods (142) can extend out of the grooves, a shell (122) is provided at the bottom of the measuring rod (1), the connecting rod (2) is provided in the shell (122) and is connected via a loading thread (21), the other end of the guide rod (13) penetrates into the connecting rod (2), and the distance measuring device (151) contacts the top end of the connecting rod (2).

2. The downhole digital display drilling detection tool according to claim 1, characterized in that: It also comprises a plurality of main rods (3), wherein the plurality of main rods (3) are connected in sequence via threads (5), and the main rods (3) at the ends are connected to the connecting rods (2) via threads (5).

3. A downhole digital display drilling detection tool according to claim 2, characterized in that: The distance measuring device (151) is a displacement sensor. The distance measuring device (151) is connected to a digital display board (153) via a wire (152). The digital display board (153) extends outside the main rod (3).

4. A downhole digital display drilling detection tool according to claim 1, characterized in that: A top plate (121) is provided on the top of the measuring rod (1), and a plurality of limit posts (11) are evenly distributed on the top plate (121).

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