Blast hole measuring device for tunnel advanced geological forecast

Abstract

The utility model discloses a blast hole measuring device for tunnel advanced geology forecast, which comprises a plurality of measuring cylinders coaxially sleeved in sequence from inside to outside, each measuring cylinder forms a stretching ruler structure for measuring the depth of a blast hole, and a positioning structure for limiting the mutual movement of two adjacent measuring cylinders is arranged in two adjacent measuring cylinders. Scale marks are arranged on the outer walls of the measuring cylinders, the top of the innermost measuring cylinder is rotationally connected with a digital display angle measuring instrument used for measuring the angle of a blast hole, depth measurement and angle measurement of the blast hole are combined together, two parameters are obtained through one-time measurement, the operation time is saved, the operation is carried out in a constructed tunnel, the environment is poor, and the working efficiency is high. Many working machines are used, time is saved, and personal health can be indirectly protected. The method adapts to the technical field of blast hole measurement.

Description

Technical Field

[0001] The utility model belongs to the technical field of blasthole measurement, in particular to a blasthole measurement device for advanced geological prediction of tunnels. Background Art

[0002] Among the many methods of tunnel advance prediction, seismic wave reflection method, as a long-distance geophysical prediction method, can not only accurately predict the geological conditions ahead of excavation but also save time for tunnel excavation, so it has been widely used in the industry. The accuracy of the seismic wave reflection method results is not only related to the judgment ability of technicians, but also has a lot to do with the accuracy of on-site data recording. The depth, spacing and angle of the on-site blasting holes are important parameters that are directly related to the accuracy of the prediction results.

[0003] In the prior art, the depth and angle of blastholes are measured separately. The traditional blasthole measuring device uses a fixed length ruler or a soft tape measure for indirect measurement, and the angle measuring instrument uses a separate angle measuring instrument plus an auxiliary rod for measurement. The measured values ​​have large errors and waste time. Therefore, we propose a blasthole measuring device for tunnel advanced geological prediction. Utility Model Content

[0004] The utility model provides a blasthole measuring device for advanced geological prediction of a tunnel, so as to solve the problem raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A blasthole measuring device for advanced geological prediction of tunnels, the key point is that it includes a plurality of measuring cylinders coaxially sleeved in sequence from the inside to the outside, each measuring cylinder constitutes a stretching ruler structure for measuring the depth of the blasthole, two adjacent measuring cylinders are provided with a positioning structure for limiting the mutual movement of the two adjacent measuring cylinders, scale lines are opened on the outer walls of the measuring cylinders, and the top of the innermost measuring cylinder is rotatably connected to a digital angle measuring instrument for measuring the angle of the blasthole.

[0007] Furthermore, the positioning structure is installed on the inner wall of the inner measuring cylinder of the two adjacent measuring cylinders.

[0008] Furthermore, the positioning structure includes a leaf spring arranged on the inner wall of the measuring cylinder, the left end of the leaf spring is fixedly connected to the lower end of the inner wall of the measuring cylinder, and the right end of the leaf spring is fixedly connected to a limiting metal ball. A first limiting hole is penetrated on the right side of the lower end of the measuring cylinder located on the inner side of the two adjacent measuring cylinders, and a second limiting hole is penetrated on the right side of the upper end of the measuring cylinder located on the outer side of the two adjacent measuring cylinders. The limiting metal ball extends into the first limiting hole under the elastic force of the leaf spring. When the measuring cylinder located on the outer side of the two adjacent measuring cylinders is stretched, the limiting metal ball is clamped by the first limiting hole in the inside of the second limiting hole under the elastic force of the leaf spring to constitute the limiting of the two adjacent measuring cylinders.

[0009] Furthermore, the left and right ends of the leaf spring are respectively welded to the inner wall of the measuring tube and the limiting metal ball.

[0010] Furthermore, the leaf spring is a V-shaped metal plate component.

[0011] Furthermore, the radius of each measuring cylinder decreases from bottom to top.

[0012] Due to the adoption of the above structure, the technical progress achieved by the utility model compared with the prior art is that: the stretching ruler structure rotatably installed on the back of the digital display angle measuring instrument solves the problem that the traditional method cannot measure the depth and angle of the blasthole at the same time, thereby increasing the convenience of measuring the depth and angle of the blasthole, saving time for on-site operations and improving work efficiency; through the positioning structure arranged in two adjacent measuring inner cylinders, a plurality of measuring cylinders are positioned by the positioning structure when connected, thereby facilitating the stretching positioning of the plurality of measuring inner cylinders, thereby allowing the stretching ruler structure to stretch to different lengths, and at the same time, the outer surface of the measuring cylinder is provided with scale lines, which facilitates reading the depth of the blasthole through the scale lines, and can greatly improve the accuracy of the measurement in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] In the attached picture:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the outermost measuring tube of the utility model when it is stretched and unfolded;

[0017] Figure 3 It is a cross-sectional view of each measuring cylinder of the utility model when stretched open;

[0018] Figure 4 for Figure 3Enlarged view of point A in the middle.

[0019] Marked parts: 1. Measuring cylinder; 2. Digital angle measuring instrument; 3. Scale line; 4. Leaf spring; 5. Limiting metal ball; 6. First limiting hole; 7. Second limiting hole. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] The utility model discloses a blasthole measuring device for advanced geological prediction of a tunnel. Figure 1-4 As shown, it includes a plurality of measuring tubes 1 coaxially sleeved in sequence from the inside to the outside, each measuring tube 1 constitutes a stretching ruler structure for measuring the depth of the blasthole, a positioning structure is arranged in two adjacent measuring tubes 1, the positioning structure is used to limit the mutual movement of the two adjacent measuring tubes 1, and a scale line 3 is opened on the outer wall of the measuring tube 1, and the top of the innermost measuring tube 1 is rotatably connected with a digital angle measuring instrument 2 for measuring the angle of the blasthole, and the digital angle measuring instrument 2 is a prior art, which is rotatably connected to the top of the inner measuring tube 1, and can rotate the digital angle measuring instrument 2, and read the inclination angle of the blasthole through the angle between the digital angle measuring instrument 2 and the stretching ruler structure, and the stretching ruler structure rotatably installed on the back of the digital angle measuring instrument 2 solves the problem that the traditional digital angle measuring instrument 2 uses a fixed length of measuring ruler to measure blastholes of different depths, and the measuring tube 1 can meet the measurement of blastholes of different depths by stretching, thereby increasing the convenience of blasthole depth and angle measurement. The working principle and advantages of the utility model are as follows: through the positioning structure provided by the measuring tube 1 and the measuring tube 1, the positioning structure is used to position several measuring tubes 1 when connected, so that it is convenient for several measuring tubes 1 to be stretched and positioned, so that the stretching ruler structure is stretched to different lengths. At the same time, the outer surface of the measuring tube 1 is provided with scale lines 3, so that the depth of the blast hole can be read through the scale lines 3, and the accuracy of the measurement in the hole can be improved; the utility model solves the problem that the traditional method cannot measure the depth and angle of the blast hole at the same time through the stretching ruler structure rotatably installed on the back of the digital display angle measuring instrument 2, thereby increasing the convenience of measuring the depth and angle of the blast hole, saving time for on-site operations and improving work efficiency. The operation is carried out in a tunnel under construction with a poor environment and many operating machines. Saving time can indirectly protect personal health.

[0022] As a preferred embodiment of the utility model, a positioning structure is installed on the inner wall of the measuring cylinder 1 located on the inner side of the two adjacent measuring cylinders 1, and the positioning structure includes a leaf spring 4 arranged on the inner wall of the measuring cylinder 1, the left end of the leaf spring 4 is fixedly connected to the lower end of the inner wall of the measuring cylinder 1, and the right end of the leaf spring 4 is fixedly connected to a limiting metal ball 5. A first limiting hole 6 is penetrated on the right side of the lower end of the measuring cylinder 1 located on the inner side of the two adjacent measuring cylinders 1, and a second limiting hole 7 is penetrated on the right side of the upper end of the measuring cylinder 1 located on the outer side of the two adjacent measuring cylinders 1. The limiting metal ball 5 extends into the first limiting hole 6 under the elastic force of the leaf spring 4. When the measuring cylinder 1 located on the outer side of the two adjacent measuring cylinders 1 is stretched, the limiting metal ball 5 is clamped in the inside of the second limiting hole 7 by the first limiting hole 6 under the elastic force of the leaf spring 4, thereby realizing the limiting of the two adjacent measuring cylinders 1 and increasing the stability of the stretching ruler after stretching.

[0023] As a preferred embodiment of the utility model, the left end of the leaf spring 4 is fixedly connected to the inner wall of the measuring tube 1, the right end of the leaf spring 4 is welded to the limiting metal ball 5, the leaf spring 4 is a "V"-shaped metal plate component, and the radius of each measuring tube 1 decreases from bottom to top.

[0024] The working principle and use process of the utility model are as follows: when in use, the measuring device is taken out, and the measuring tube 1 is stretched according to the depth of the blasthole, so that several measuring tubes 1 are stretched to a suitable length. At this time, the limiting metal ball 5 welded at the end of the leaf spring 4 is clamped in the inside of the second limiting hole 7 by the first limiting hole 6, so that two adjacent measuring tubes 1 are fixed, and the stretching ruler device is inserted into the blasthole, and the depth of the blasthole is read through the scale line 3, and the digital angle measuring instrument 2 is rotated, and the angle of the blasthole is read through the angle between the digital angle measuring instrument 2 and the stretching ruler.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of protection of the claims of the utility model.

Claims

1. A blasthole measurement device for advanced geological prediction of a tunnel, characterized in that: The invention comprises a plurality of measuring cylinders (1) which are coaxially sleeved in sequence from the inside to the outside, each of the measuring cylinders (1) constituting a stretching ruler structure for measuring the depth of a blasthole, a positioning structure for limiting the mutual movement of the two adjacent measuring cylinders (1) is arranged in two adjacent measuring cylinders (1), scale lines (3) are arranged on the outer walls of the measuring cylinders (1), and a digital angle measuring instrument (2) for measuring the angle of a blasthole is rotatably connected to the top of the innermost measuring cylinder (1).

2. The blasthole measurement device for advanced geological prediction of a tunnel according to claim 1, characterized in that: The positioning structure is installed on the inner wall of the inner measuring cylinder (1) of the two adjacent measuring cylinders (1).

3. The blasthole measurement device for advanced geological prediction of a tunnel according to claim 2, characterized in that: The positioning structure comprises a leaf spring (4) arranged on the inner wall of the measuring cylinder (1), the left end of the leaf spring (4) being fixedly connected to the lower end of the inner wall of the measuring cylinder (1), the right end of the leaf spring (4) being fixedly connected to a limiting metal ball (5), a first limiting hole (6) penetrating the right side of the lower end of the measuring cylinder (1) located on the inner side of the two adjacent measuring cylinders (1), a second limiting hole (7) penetrating the right side of the upper end of the measuring cylinder (1) located on the outer side of the two adjacent measuring cylinders (1), the limiting metal ball (5) extending into the first limiting hole (6) under the elastic force of the leaf spring (4), when the measuring cylinder (1) located on the outer side of the two adjacent measuring cylinders (1) is stretched, the limiting metal ball (5) is clamped by the first limiting hole (6) into the inside of the second limiting hole (7) under the elastic force of the leaf spring (4) to form the limiting of the two adjacent measuring cylinders (1).

4. The blasthole measurement device for advanced geological prediction of a tunnel according to claim 3 is characterized by: The left and right ends of the leaf spring (4) are respectively welded to the inner wall of the measuring tube (1) and the limiting metal ball (5).

5. The blasthole measurement device for advanced geological prediction of a tunnel according to claim 4, characterized in that: The leaf spring (4) is a V-shaped metal plate component.

6. The blasthole measurement device for advanced geological prediction of a tunnel according to claim 5, characterized in that: The radius of each measuring cylinder (1) decreases from bottom to top.

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