Device for calibrating and testing underground goaf measuring instrument

Abstract

The invention provides a device for calibrating and testing an underground goaf measuring instrument, and relates to the technical field of underground goaf measuring equipment, and the device comprises a drilling machine system which comprises a drilling machine, a power head, a motor and a transmission crawler belt; the upper end of the single-action device is connected with the transmission track and the power head respectively, and the transmission track and the power head can drive the single-action device to independently rotate at different speeds respectively; the upper end of the transfer drill rod is connected with the lower end of the single actuator, and the lower end is connected with an underground goaf measuring instrument; and the simulation detection box comprises a box body, an upper cover plate, a plurality of positioning columns and a flexible plate, the positioning columns are arranged on the bottom surface of the box body, and the flexible plate is installed in a simulated goaf structure between the different positioning columns. The device has the advantages that the problem that rotation azimuth information cannot be determined due to the fact that the lowest rotation speed of a power head is too high is solved, unified and integrated multifunctional calibration and experiments are achieved, and high-precision rotation calibration and instrument testing of real drilling working conditions can be conducted on an underground goaf measuring instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of underground void measurement equipment, and particularly to a device for calibrating and testing underground void measurement instruments. Background Art

[0002] Underground void measurement mainly includes the measurement sub-section during drilling and the cabled measurement instrument lowered after the hole is formed. At present, the calibration and testing of such instruments mainly focus on the functional testing of the sensors carried by them. For detection sensors and methods whose measurement results highly depend on the rotation of the instrument, such as downhole laser scanning, sonar scanning, video imaging, etc. There is a lack of calibration and experimental devices for simulating the rotating conditions downhole during drilling. For downhole measurement-while-drilling instruments verified in the indoor conventional calibration and testing environment, their performance and data reliability in the real downhole environment cannot be effectively verified, and the accuracy and credibility of the detection results cannot be guaranteed. At the same time, the calibration of rotating instruments requires high-precision rotation azimuth data and relatively low rotation speeds, while the testing of real working conditions has complex requirements for pressure, torque, drilling fluid circulation, and high-speed rotation. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a device for calibrating and testing underground void measurement instruments.

[0004] An embodiment of the present invention provides a device for calibrating and testing underground void measurement instruments, including:

[0005] A drilling rig system, which includes a drilling rig, a power head, an electric motor, and a transmission track. The drilling rig is connected to the power head to drive the power head to move up and down, and the electric motor is installed on the power head and connected to the transmission track;

[0006] A single-action device, whose upper end is respectively connected to the transmission track and the power head, and the transmission track and the power head can respectively drive the single-action device to rotate independently at different speeds;

[0007] An adapter drill pipe, whose upper end is connected to the lower end of the single-action device, and the lower end of the adapter drill pipe is used to connect an underground void measurement instrument;

[0008] And a simulation detection box, which is arranged below the adapter drill pipe. The simulation detection box includes a box body, an upper cover plate, a plurality of positioning columns, and a flexible plate. The upper end of the box body is open, the upper cover plate is disposed on the upper port of the box body in an openable manner, all the positioning columns are arranged on the bottom surface of the box body, and the flexible plate is installed between different positioning columns to distort its shape, thereby changing the simulated void structure inside the box body.

[0009] Further, the single actuator includes an outer tube, a plurality of stop pins, a plurality of elastic members, and an inner tube. The outer tube is rotatably sleeved outside the inner tube. The outer wall of the inner tube is provided with single bevel gears. The upper end of the inner tube is connected to the power head. Each of the stop pins is circumferentially spaced along the inner wall of the outer tube. The rear end of each stop pin is fixedly connected to the outer tube through an elastic member. The front end of the stop pin extends out of the inner wall of the outer tube and is provided with a single bevel head. The single bevel head of each stop pin is inserted between two adjacent single bevel gears to limit the relative rotation of the outer tube and the inner tube in only one direction. The outer tube is connected to the transmission track.

[0010] Further, a plurality of jacks are provided on the inner wall of the outer tube. The elastic members are fixedly arranged in the jacks. The rear end of the stop pin is inserted into the jacks and connected to the elastic members.

[0011] Further, the elastic member is a spring.

[0012] Further, transmission teeth are provided on the outer wall of the outer tube. The transmission teeth are meshed and connected with the transmission track.

[0013] Further, the power head is provided with an output shaft extending downward. The upper end of the inner tube is connected to the lower end of the output shaft.

[0014] Further, the upper end of the adapter drill pipe is fixedly connected to the lower end of the inner tube.

[0015] Further, one side of the box body is provided with an openable side cover plate. A plurality of the positioning posts are provided on the side cover plate. The flexible plate can be installed between different positioning posts on the side cover plate to distort its shape, thereby changing the simulated void structure inside the box body.

[0016] Further, the drilling rig system further includes an elevated platform. A plurality of legs are provided at the bottom of the drilling rig. Each of the legs is fixed on the elevated platform.

[0017] Further, a drain hole is provided at the bottom of the box body.

[0018] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are:

[0019] 1. A device for calibrating and testing underground goaf measurement instruments according to the present invention drives a single actuator to rotate by setting a power head, thereby driving a transition drill pipe to rotate at a high speed to simulate real drilling conditions; drives the single actuator to rotate by setting a motor and a transmission track, thereby driving the transition drill pipe to rotate slowly and precisely, and can determine accurate rotation azimuth information and low-speed driving conditions, complete high-precision low-speed calibration, solve the problems that the minimum rotation speed of the power head is too fast and the rotation azimuth information cannot be determined, realize unified and integrated multi-functional calibration and experiments, and can perform high-precision rotation calibration and instrument tests under real drilling conditions on underground goaf measurement instruments.

[0020] 2. In a device for calibrating and testing underground goaf measurement instruments according to the present invention, a plurality of positioning columns are provided on the inner surface of the box body of the simulation detection box. By installing a flexible plate between different positioning columns to be distorted, different shapes of simulated goaf structures are formed, and at the same time, a simulation space can be provided for the drill pressure, torque and drilling fluid circulation of the drill.

[0021] 3. In a device for calibrating and testing underground goaf measurement instruments according to the present invention, the single actuator realizes single output under multiple power conditions through the cooperation of the transmission teeth of the outer pipe, the internal stop pin and the single inclined surface tooth structure on the outer surface of the inner pipe, and can provide both real drilling conditions and high-precision low-speed calibration conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a device for calibrating and testing underground goaf measurement instruments according to the present invention;

[0023] Figure 2 is a schematic diagram of a drill rig system;

[0024] Figure 3 is a connection schematic diagram of a power head, a single actuator and a transition drill pipe;

[0025] Figure 4 is a sectional view of the single actuator;

[0026] Figure 5 is a schematic diagram of the simulation detection box.

[0027] In the figure: 1. Drill rig system; 101. Drill rig; 102. Power head; 103. Installation plate; 104. Motor; 105. Transmission track; 106. Elevated platform; 2. Single actuator; 201. Outer pipe; 202. Inner pipe; 203. Stop pin; 204. Elastic member; 205. Single inclined surface tooth; 3. Transition drill pipe; 4. Simulation detection box; 401. Box body; 402. Upper cover plate; 403. Positioning column; 404. Perforation; 405. Side cover plate. DETAILED DESCRIPTION OF THE INVENTION

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following is a relatively optimal one among multiple possible embodiments of the present invention, aiming to provide a basic understanding of the present invention, but not aiming to identify the key or decisive elements of the present invention or limit the scope to be protected.

[0029] In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0030] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0031] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0032] It should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figure 1 , an embodiment of the present invention provides a device for calibrating and testing an underground void measurement instrument, mainly including a drilling rig system 1, a single-acting device 2, a connecting drill pipe 3, and a simulation detection box 4.

[0034] As Figure 2 and 3 shown, the drilling rig system 1 includes a drilling rig 101, a power head 102, a motor 104, and a driving crawler 105. Among them, the drilling rig 101 is connected to the power head 102 to drive the power head 102 to lift and lower, and the motor 104 is installed on the power head 102 and connected to the driving crawler 105. The drilling rig 101 is provided with a fixedly arranged mounting plate 103, the power head 102 and the motor 104 are both installed on the mounting plate 103, and the power head 102 is located on one side of the motor 104. Generally, a stepping motor 104 with relatively high control precision is selected for the motor 104.

[0035] In some embodiments, the drilling rig system 1 further includes an elevated platform 106, and a plurality of legs are provided at the bottom of the drilling rig 101. The elevated platform 106 is a rectangular frame structure, and a plurality of bolt holes are provided on the upper portion of the elevated platform 106, and each of the legs is fixed to the bolt hole by bolts, so that the drilling rig 101 is fixed to the elevated platform 106, so that the power head 102 is at a predetermined height.

[0036] The upper end of the single-acting device 2 is connected to the transmission track 105 and the power head 102, respectively, and the transmission track 105 and the power head 102 can drive the single-acting device 2 to rotate independently at different speeds. The motor 104 can drive the transmission track 105 to rotate and drive the single-acting device 2 to rotate slowly, and the power head 102 can drive the single-acting device 2 to rotate at a high speed.

[0037] Specifically, Figure 4 As shown, the single-acting device 2 includes an outer tube 201, a plurality of stop pins 203, a plurality of elastic members 204 and an inner tube 202. The outer tube 201 is rotatably sleeved on the outside of the inner tube 202. The outer wall of the inner tube 202 is provided with a single bevel tooth 205. The upper end of the inner tube 202 is connected to the power head 102. The stop pins 203 are circumferentially spaced along the inner wall of the outer tube 201. The rear end of each stop pin 203 is fixedly connected to the outer tube 201 through an elastic member 204. The front end of the stop pin 203 extends out of the inner wall of the outer tube 201 and is provided with a single bevel head. The single bevel head of each stop pin 203 is inserted between two adjacent single bevel teeth 205 to limit the outer tube 201 and the inner tube 202 to rotate relative to each other only in one direction. That is, the outer tube 201 rotates in one direction (counterclockwise), and the stop pin 203 moves the single bevel tooth 205 to make the inner tube 202 rotate synchronously; when the inner tube 202 rotates in this direction, the single bevel tooth 205 moves along the single bevel head and cannot drive the outer tube 201 to rotate.

[0038] The outer tube 201 is connected to the transmission track 105. The outer wall of the outer tube 201 is provided with transmission teeth, and the transmission teeth are meshed and connected with the transmission track 105. The motor 104 drives the transmission track 105 to drive the outer tube 201 to rotate, and the outer tube 201 drives the inner tube 202 to rotate. The power head 102 is provided with an output shaft extending downward, and the upper end of the inner tube 202 is connected to the lower end of the output shaft. The power head 102 drives the inner tube 202 to rotate independently.

[0039] In some embodiments, a plurality of jacks are provided on the inner wall of the outer tube 201. The elastic member 204 is fixedly arranged in the jacks. The rear end of the stop pin 203 is inserted into the jacks and connected to the elastic member 204. Preferably, the elastic member 204 is a spring. The jacks are arranged along the radial direction of the outer tube 201. The spring is fixedly arranged in the jacks and connected to the stop pin 203.

[0040] The adapter drill pipe 3 is vertically arranged below the single-acting device 2 and coaxially arranged with the single-acting device 2. The upper end of the adapter drill pipe 3 is connected to the lower end of the single-acting device 2. Here, the upper end of the adapter drill pipe 3 is fixedly connected to the lower end of the inner tube 202 by threads. The lower end of the adapter drill pipe 3 is used to connect a downhole void measurement instrument, which is generally a measurement-while-drilling instrument and a wired measurement device.

[0041] As Figure 5 shown, the simulation detection box 4 is arranged below the adapter drill pipe 3. The simulation detection box 4 is used to simulate the downhole void environment. The simulation detection box 4 includes a box body 401, an upper cover plate 402, a plurality of positioning columns 403 and a flexible plate. The upper end of the box body 401 is open. The upper cover plate 402 is openably arranged at the upper port of the box body 401. The number of the upper cover plates 402 can be set to two. The two upper cover plates 402 are arranged in a split manner. A perforation 404 is provided at the closing position of the two upper cover plates 402 for the adapter drill pipe 3 to pass through. All the positioning columns 403 are arranged on the bottom surface of the box body 401. The flexible plate is installed between different positioning columns 403 to distort its shape, so as to change the void structure simulated inside the box body 401.

[0042] In some embodiments, a side cover plate 405 that can be opened is provided on one side of the box body 401. A plurality of the positioning columns 403 are provided on the side cover plate 405. The flexible plate can be installed between different positioning columns 403 on the side cover plate 405 to distort its shape, so as to change the void structure simulated inside the box body 401. That is to say, the positioning columns 403 can be arranged on each side of the inner wall of the box body 401, so as to install the flexible plate to simulate different void structures. Stones can also be placed in the box body 401 to simulate falling stones in the void.

[0043] In order to simulate the drilling fluid circulation, water can be injected into the box body 401. The mud pump of the drilling rig 101 is arranged to pump water into the box body 401 through the drill pipe, so as to simulate the downward pressure, torque and drilling fluid pressure in the real drilling process. A drain hole is also provided at the bottom of the box body 401 to drain the water in the box body 401.

[0044] The embodiment of the present invention provides a device for calibrating and testing an underground void measuring instrument. When working, the underground void measuring instrument is installed at the lower end of the adapter drill pipe 3, and the adapter drill pipe 3 and the underground void measuring instrument are extended into the box 401. Under the actual drilling condition test, the inner tube 202 is driven to rotate by the power head 102, and the outer tube 201 cannot rotate. The inner tube 202 directly drives the adapter drill pipe 3 and the underground void measuring instrument to rotate at a high speed, and provides the drilling pressure, torque and drilling fluid circulation environment of the downhole drilling condition, so as to test the structural reliability and detection performance of the measuring instrument under the actual drilling condition.

[0045] When the underground empty area measuring instrument needs to be calibrated, the outer tube 201 is driven to rotate by the transmission crawler driven by the motor 104. The transmission crawler has a fixed transmission ratio, which can determine the precise rotational orientation information and the low-speed driving condition. Under the action of the stop pin 203 on the inner wall of the outer tube 201, the stop pin 203 and the single bevel teeth 205 on the outer surface of the inner tube 202 transmit torque, driving the inner tube 202 to rotate, thereby driving the underground empty area measuring instrument placed in the box 401 to rotate, and completing the precise calibration of the underground empty area measuring instrument in the simulated empty area environment.

[0046] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0047] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for calibrating and testing underground void measurement instruments, characterized in that, Comprising: A drilling rig system, which includes a drilling rig, a power head, a motor, and a driving crawler. The drilling rig is connected to the power head to drive the power head to move up and down. The motor is installed on the power head and connected to the driving crawler; A single-acting device, the upper end of which is respectively connected to the driving crawler and the power head. The driving crawler and the power head can respectively drive the single-acting device to rotate independently at different speeds; An adapter drill pipe, the upper end of which is connected to the lower end of the single-acting device, and the lower end of the adapter drill pipe is used to connect an underground void measurement instrument; And a simulation detection box, which is arranged below the adapter drill pipe. The simulation detection box includes a box body, an upper cover plate, a plurality of positioning columns, and a flexible plate. The upper end of the box body is open, the upper cover plate is disposed on the upper port of the box body in an openable manner. All the positioning columns are arranged on the bottom surface of the box body. The flexible plate is installed between different positioning columns and twists its shape, thereby changing the simulated void structure inside the box body.

2. The device for calibrating and testing an underground void measurement instrument according to claim 1, characterized in that: The single-acting device includes an outer tube, a plurality of stop pins, a plurality of elastic members, and an inner tube. The outer tube is rotatably sleeved outside the inner tube. The outer wall of the inner tube is provided with single-bevel teeth. The upper end of the inner tube is connected to the power head. Each stop pin is circumferentially spaced along the inner wall of the outer tube. The rear end of each stop pin is fixedly connected to the outer tube through an elastic member. The front end of the stop pin extends out of the inner wall of the outer tube and is provided with a single-bevel head. The single-bevel head of each stop pin is inserted between two adjacent single-bevel teeth to limit the relative rotation of the outer tube and the inner tube in only one direction. The outer tube is connected to the driving crawler.

3. The device for calibrating and testing an underground void measurement instrument according to claim 2, characterized in that: A plurality of jacks are provided on the inner wall of the outer tube, and the elastic members are fixedly arranged in the jacks. The rear end of the stop pin is inserted into the jack and connected to the elastic member.

4. A device for calibrating and testing an underground void measurement instrument according to claim 2, characterized in that: The elastic member is a spring.

5. The device for calibrating and testing an underground void measurement instrument according to claim 2, characterized in that: The outer wall of the outer tube is provided with transmission teeth, and the transmission teeth are meshed and connected with the driving crawler.

6. The device for calibrating and testing an underground void measurement instrument according to claim 2, characterized in that: The power head is provided with an output shaft extending downward, and the upper end of the inner tube is connected to the lower end of the output shaft.

7. The device for calibrating and testing an underground void measurement instrument according to claim 2, characterized in that: The upper end of the adapter drill pipe is fixedly connected to the lower end of the inner tube.

8. A device for calibrating and testing an underground void measurement instrument according to claim 1, characterized in that: One side of the box body is provided with an openable side cover plate. A plurality of the positioning columns are provided on the side cover plate. The flexible plate can be installed between different positioning columns on the side cover plate and twists its shape, thereby changing the simulated void structure inside the box body.

9. The device for calibrating and testing an underground void measurement instrument according to claim 1, characterized in that: The drilling rig system further includes an elevated platform. A plurality of legs are provided at the bottom of the drilling rig, and each leg is fixed on the elevated platform.

10. A device for calibrating and testing an underground void measurement instrument according to claim 1, characterized in that: The bottom of the box body is provided with a drain hole.

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