Anchor rod length detection equipment

Abstract

The utility model belongs to the technical field of anchor rod detection, and discloses an anchor rod length detection device. The detection equipment comprises a detection host, a telescopic rod and an excitation detection part, the excitation detection component comprises an annular high-strength magnet, an electromagnetic push rod and a piezoelectric acceleration sensor; one end of the telescopic rod is rotationally connected with the excitation detection part; the detection host is connected with the electromagnetic push rod and the piezoelectric acceleration sensor through a data transmission line, and the detection host can control the electromagnetic push rod to excite vibration and process data sensed by the piezoelectric acceleration sensor. According to the detection equipment, the electromagnetic push rod and the piezoelectric acceleration sensor are arranged in the excitation detection component, manual excitation is replaced by the electromagnetic push rod, the excitation force is stable and controllable, and a stable detection result can be obtained. The telescopic rod is connected with the excitation detection component, and the annular high-strength magnet is connected with the anchor rod, so that high-altitude operation is not needed, and the life safety of personnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor rod detection, in particular to an anchor rod length detection device. Background Art

[0002] Bolt support has become the main support method for coal mine tunnels. Bolt support technology has greatly improved the control level of tunnel surrounding rock and ensured the safe production of mines. However, since bolt support is a hidden support, the support quality is difficult to monitor, which makes coal mine roof disasters prone to occur.

[0003] The existing non-destructive testing equipment for anchor rod length uses a rod length vibrator or a vibrating hammer for vibration, which are both artificial vibrations, unstable vibration intensity, and uncontrollable excitation force. In addition, most types of tunnels nowadays have high tunnel heights. For anchor rods at the top plate position, ladders or platforms need to be built, which makes detection difficult. When testing the next anchor rod, it is necessary to move the platform and ladder to work at high altitude, which is not only a huge workload, but also detrimental to the safety of workers.

[0004] To this end, the utility model provides an anchor rod length detection device. Utility Model Content

[0005] The utility model aims to provide an anchor rod length detection device, which can detect the anchor rod length without artificial excitation and high-altitude operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An anchor rod length detection device comprises a detection host, a telescopic rod and a vibration detection component;

[0008] The excitation detection component includes a ring-shaped high-strength magnet, an electromagnetic push rod and a piezoelectric acceleration sensor;

[0009] The annular high-strength magnet is arranged on the top of the excitation detection component;

[0010] The electromagnetic push rod is arranged inside the excitation detection component, and a striker is arranged at the end of the electromagnetic push rod; the piezoelectric acceleration sensor is also arranged inside the excitation detection component;

[0011] One end of the telescopic rod is rotatably connected to the vibration detection component;

[0012] The detection host is connected to the electromagnetic push rod and the piezoelectric acceleration sensor through a data transmission line.

[0013] Preferably, a counterweight block is also provided inside the excitation detection component.

[0014] Preferably, the telescopic rod comprises a rod body, a rotating shaft and a handle;

[0015] The rod body is composed of hollow round rods with decreasing diameters, and can be gradually contracted or extended;

[0016] The top of the rod body is rotatably connected to the vibration detection component via a rotating shaft;

[0017] The handle is arranged at the bottom of the rod body.

[0018] Preferably, the handle is made of annular PU foam, and the handle wraps around the outermost section of the rod body.

[0019] Preferably, the data transmission line passes through the interior of the rod body, and is finally connected to the electromagnetic push rod and the piezoelectric acceleration sensor through the hollow part of the rotating shaft.

[0020] Preferably, the detection host includes a flameproof housing, a display screen, operation buttons, a battery and a single-chip microcomputer; a flameproof housing is arranged outside the detection host;

[0021] A display screen and operation buttons are arranged on the front side of the detection host;

[0022] A battery and a single-chip microcomputer are arranged inside the detection host, and the single-chip microcomputer is connected to the electromagnetic push rod and the piezoelectric acceleration sensor via a data transmission line.

[0023] Preferably, the counterweight is made of lead.

[0024] Preferably, a protective shell is provided on the outer side of the excitation detection component.

[0025] The beneficial effects of the utility model are as follows:

[0026] The utility model proposes an anchor rod length detection device. The detection device arranges an electromagnetic push rod and a piezoelectric acceleration sensor in an excitation detection component. The electromagnetic push rod replaces artificial excitation, the excitation force is stable and the excitation force is controllable, and a stable detection result can be obtained; data is sensed by the piezoelectric acceleration sensor and the data is fed back to a detection host, and the detection host calculates and generates the anchor rod length, and the measurement process is intuitive and efficient; a telescopic rod is connected to the excitation detection component, and an annular high-strength magnet is arranged at the top of the excitation detection component to be adsorbed to the exposed end section of the anchor rod, so that workers do not need to perform high-altitude operations, thereby ensuring the life safety of the workers, and at the same time, there is no need to build ladders or platforms, thereby reducing workload and improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structural connection relationship of the utility model, wherein the telescopic rod is in a retracted state;

[0028] Figure 2 It is a schematic diagram of the assembly of the anchor rod detection of the utility model, wherein the telescopic rod is in an extended state;

[0029] Figure 3 It is a schematic diagram of the assembly of the vibration detection component and the telescopic rod of the utility model;

[0030] Figure 4 It is a schematic diagram of the internal structure of the excitation detection component of the utility model;

[0031] Among them, a-anchor;

[0032] 1-excitation detection components: 11-annular high-strength magnet, 12-electromagnetic push rod, 13-piezoelectric acceleration sensor, 14-counterweight;

[0033] 2-telescopic rod: 21-rod body, 22-handle, 23-rotating shaft;

[0034] 3-Detection host: 31-flameproof housing, 32-display screen, 33-operation buttons;

[0035] 4- Data transmission line. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Combination Figures 1 to 4 As shown, the utility model proposes an anchor rod length detection device, which can detect the anchor rod length without using artificial vibration and without high-altitude operation. The detection device mainly includes a detection host 3, a telescopic rod 2 and an excitation detection component 1.

[0039] Combination Figure 1 and Figure 4As shown, the excitation detection component 1 mainly includes an annular high-strength magnet 11, an electromagnetic push rod 12, a piezoelectric acceleration sensor 13 and a counterweight 14. The annular high-strength magnet 11 is arranged at the top of the excitation detection component 1, and is used to adsorb the exposed end section of the anchor rod a and the excitation detection component 1 together, so as to facilitate the subsequent excitation of the electromagnetic push rod 12 and the piezoelectric acceleration sensor 13 to sense the vibration of the mechanical wave. The excitation detection component 1 is provided with an electromagnetic push rod 12 inside. The electromagnetic push rod 12 is an excitation component. It is controlled by the single-chip microcomputer in the detection host 3. The end of the electromagnetic push rod 12 is equipped with a striker, which can make the excitation force more concentrated and improve the accuracy of the propagation direction of the mechanical wave generated by the excitation. The excitation detection component 1 is also provided with a piezoelectric acceleration sensor 13. The piezoelectric acceleration sensor 13 is used to receive the longitudinal wave signal reflected by the excitation in the anchor rod a, and is a key structural component for detecting the length of the anchor rod a. A protective shell is arranged on the outside of the excitation detection component 1, which can protect the internal structure of the excitation detection component 1 and ensure the accuracy of the measurement data.

[0040] Combination Figure 4 As shown, a counterweight block 14 is also provided at the lower part of the excitation detection component 1. The counterweight block 14 is composed of a lead block, and its main function is to increase the weight of the lower part of the excitation detection component 1, so that when the worker operates the telescopic rod 2, the upper part of the excitation detection component 1 with the annular high-strength magnet 11 can always be relatively located at the upper part, which is convenient for the worker to align the excitation detection component 1 with the exposed end section of the anchor rod a, improve the convenience of the worker's operation and facilitate the detection.

[0041] Combination Figure 1 and Figure 3 As shown, one end of the telescopic rod 2 is rotatably connected to the vibration detection component 1. The telescopic rod 2 mainly includes a rod body 21, a handle 22 and a rotating shaft 23. The rod body 21 is composed of hollow round rods with decreasing diameters, and can be gradually contracted or extended. Figure 2 As shown, when the telescopic rod 2 is extended, it is convenient for the user to adsorb the excitation detection component 1 on the exposed end section of the anchor rod a. Figure 1 As shown, when the telescopic rod 2 is retracted, it is convenient for the user to carry. A handle 22 is provided at the bottom of the rod body 21. The handle 22 is made of annular PU foam, and the handle 22 wraps the outermost section of the rod body 21. The handle 22 can provide friction, which is convenient for the user to hold. The top of the rod body 21 is rotatably connected to the excitation detection component 1 through the rotating shaft 23. The rotating shaft 23 connects the top of the rod body 21 and the excitation detection component 1 together, so that they can rotate relative to each other, and provide certain support and connection.

[0042] Combination Figure 1 and Figure 2As shown, the detection host 3 is connected to the electromagnetic push rod 12 and the piezoelectric acceleration sensor 13 through the data transmission line 4. The detection host 3 can control the electromagnetic push rod 12 to vibrate and process the data sensed by the piezoelectric acceleration sensor 13.

[0043] The detection host 3 mainly includes a flameproof housing 31, a display screen 32, an operation button 33, a battery and a single-chip microcomputer. The flameproof housing 31 is arranged on the outside of the detection host 3 to protect the internal structure of the detection host 3 from interference. The display screen 32 and the operation button 33 are arranged on the front side of the detection host 3, and the display screen 32 can display various operation interfaces and the anchor rod a length detection result. The operation button 33, as the input end of the operation information, can be used to operate and control the instrument and equipment. The battery and the single-chip microcomputer are arranged inside the detection host 3. The battery is used to power the equipment, and the single-chip microcomputer is connected to the electromagnetic push rod 12 and the piezoelectric acceleration sensor 13 through the data transmission line, which can be used to process the button input, excitation control and the signal sensed by the piezoelectric acceleration sensor 13.

[0044] Combination Figure 2 and Figure 3 As shown, the data transmission line 4 passes through the inside of the rod body 21, and finally passes through the hollow part of the rotating shaft 23 at the top of the rod body 21 to connect the electromagnetic push rod 12 and the piezoelectric acceleration sensor 13. Since the hollow round rod constituting the rod body 21 has a hollow structure inside, most of the data transmission line 4 is hidden in the rod body 21 of the telescopic rod 2.

[0045] The working principle of the anchor rod length detection device of the utility model is as follows:

[0046] The electromagnetic push rod 12 receives the excitation command from the detection host 3, the push rod pops out and the top of the striker hits the exposed end section of the anchor rod a. The exposed end section of the anchor rod a is subjected to an axial force, generating a longitudinal wave, which propagates in the direction of the anchoring end. When passing through the interface between the anchoring section and the free section of the anchor rod a, after reflection and transmission, a longitudinal wave in the direction of the exposed end of the anchor rod a and a longitudinal wave in the opposite direction are generated. When the longitudinal wave in the direction of the exposed end of the anchor rod a propagates back to the exposed end section, it is sensed by the piezoelectric acceleration sensor 13. When another longitudinal wave propagates to the bottom of the anchoring section, it is transmitted and reflected at the interface between the bottom of the anchoring section and the surrounding rock. When the longitudinal wave in the direction of the exposed end generated by the reflection propagates to the exposed end section, it is sensed by the piezoelectric acceleration sensor 13. The piezoelectric acceleration sensor 13 records the data of the two longitudinal waves and transmits them to the detection host 3 through the data transmission line 4. The detection host 3 calculates the reflection time of the free section and the total length by identifying the frequency peaks generated by the two longitudinal waves, and combines the wave velocities of the free section and the anchoring section to measure the free section length, anchoring section length and total length of the anchor rod a.

[0047] The length calculation formula is as follows:

[0048]

[0049]

[0050] L a =L m +L f

[0051] Where: L f —free segment length; L m — Anchorage length; L a —Total length of anchor rod; t f —free segment reflection time; t a —Full reflection time; v f — free section wave speed; v m —Wave velocity in anchoring section.

[0052] The specific operation process of the anchor rod length detection device of the utility model is as follows:

[0053] First, extend the telescopic rod 2 to a certain length so that the worker can bring the excitation detection component 1 into contact with the tunnel roof. Then, align the annular high-strength magnet 11 on the excitation detection component 1 with the exposed end anchor rod a section of the tunnel roof and adsorb it firmly. Control the detection host 3 by operating the button 33 to send an excitation command, which is transmitted to the excitation detection component 1 through the data transmission line 4. The excitation detection component 1 performs excitation and sensing, and then transmits the detection data back to the detection host 3 through the data transmission line 4. The detection host 3 can automatically generate the anchor section length L by analyzing the detected data. m , free section length L f And the total length of the anchor rod L a And it is displayed on the display screen 32. After that, the excitation detection component 1 adsorbed on the exposed end section of the top anchor rod a is removed, and the length detection of the next anchor rod a can be carried out.

[0054] The detection device of the utility model is provided with an electromagnetic push rod 12 and a piezoelectric acceleration sensor 13 in the excitation detection component 1. The electromagnetic push rod 12 replaces the artificial excitation, the excitation force is stable and the excitation force is controllable, and a stable detection result can be obtained. In addition, the piezoelectric acceleration sensor 13 senses data and feeds the data back to the detection host 3, and the detection host 3 measures and generates the length of the anchor rod a. The measurement process is intuitive and efficient. In addition, the utility model connects the telescopic rod 2 with the excitation detection component 1, and sets a ring-shaped high-strength magnet 11 at the top of the excitation detection component 1 to adsorb the exposed end section of the anchor rod a. The staff does not need to perform high-altitude operations, which ensures the life safety of the staff. At the same time, there is no need to build a ladder or a platform, which reduces the workload and improves the detection efficiency.

[0055] Of course, the above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model and should be protected by the utility model.

Claims

1. An anchor rod length detection device, characterized in that: It includes a detection host, a telescopic rod and a vibration detection component; The excitation detection component includes a ring-shaped high-strength magnet, an electromagnetic push rod and a piezoelectric acceleration sensor; The annular high-strength magnet is arranged on the top of the excitation detection component; The electromagnetic push rod is arranged inside the excitation detection component, and a striker is arranged at the end of the electromagnetic push rod; the piezoelectric acceleration sensor is also arranged inside the excitation detection component; One end of the telescopic rod is rotatably connected to the vibration detection component; The detection host is connected to the electromagnetic push rod and the piezoelectric acceleration sensor through a data transmission line.

2. The anchor rod length detection device according to claim 1, characterized in that: A counterweight block is also arranged inside the excitation detection component.

3. The anchor rod length detection device according to claim 1, characterized in that: The telescopic rod comprises a rod body, a rotating shaft and a handle; The rod body is composed of hollow round rods with decreasing diameters, and can be gradually contracted or extended; The top of the rod body is rotatably connected to the vibration detection component via a rotating shaft; The handle is arranged at the bottom of the rod body.

4. The anchor rod length detection device according to claim 3, characterized in that: The handle is made of annular PU foam, and the handle wraps the outermost section of the rod body.

5. The anchor rod length detection device according to claim 3, characterized in that: The data transmission line passes through the interior of the rod body, and is finally connected to the electromagnetic push rod and the piezoelectric acceleration sensor through the hollow part of the rotating shaft.

6. The anchor rod length detection device according to claim 5, characterized in that: The detection host includes a flameproof housing, a display screen, operation buttons, a battery and a single-chip microcomputer; A flameproof housing is provided outside the detection host; A display screen and operation buttons are arranged on the front side of the detection host; A battery and a single-chip microcomputer are arranged inside the detection host, and the single-chip microcomputer is connected to the electromagnetic push rod and the piezoelectric acceleration sensor via a data transmission line.

7. The anchor rod length detection device according to claim 2, characterized in that: The counterweight is made of lead.

8. The anchor rod length detection device according to claim 1, characterized in that: A protective shell is arranged outside the excitation detection component.

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