Coal drill pipe anti-torque testing device and method

Abstract

The present invention discloses a coal drill pipe anti-torque testing device and method, including a coal drill pipe, a control console, a power device, an axial force device, a torque speed testing device, and a loading device; the control console drives the power device; the power device, the axial force device and one end of the coal drill pipe are connected in sequence, and the control console controls the power device to apply torque to the coal drill pipe through the axial force device; the other end of the coal drill pipe is connected to the loading device, the loading device applies torque to the coal drill pipe and makes the coal drill pipe follow the power device to resist torque through the axial force device; the torque speed testing device is connected to the coal drill pipe to detect the anti-torque state of the coal drill pipe; and the detected state data of the coal drill pipe is sent to the control console for fault analysis. This scheme loads the axial thrust and rotational torque of the coal drill pipe, so that the coal drill pipe resists torque under the action of the axial thrust, and detects the torque state and performs fault analysis in real time, which greatly improves the reliability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, and in particular to a coal drill pipe anti-torque testing device and method. Background Art

[0002] Coal drill pipes are operated in an environment where they are subjected to high-speed rotation and axial thrust and rotational torque, and are prone to deformation and fracture failures. In order to make the coal drill pipes suitable for the use environment where they are subjected to high-speed rotation and axial thrust and rotational torque in mines, to avoid deformation and fracture caused by axial thrust and rotational torque, and to ensure that the coal drill pipes do not deform or fracture in the working state, it is necessary to perform anti-torque testing on the coal drill pipes.

[0003] At present, relevant testing equipment only performs anti-torque detection on coal drill pipes at rated speed, and cannot simulate the dual influence of axial thrust and rotational torque on coal drill pipes. The anti-torque detection without axial thrust is too far from the actual working conditions and cannot meet the requirements of measuring the actual use status of coal drill pipes.

[0004] It can be seen that how to improve the reliability of the coal drill pipe anti-torque testing device is a problem that needs to be solved in the field. Summary of the invention

[0005] In view of the technical problem that the existing coal drill pipe anti-torque testing device has low reliability, the purpose of the present invention is to provide a coal drill pipe anti-torque testing device, which loads the coal drill pipe with axial thrust and rotational torque, so that the coal drill pipe can resist torque under the action of axial thrust, and detects and analyzes the anti-torque status of the coal drill pipe in real time, thereby greatly improving the reliability of the coal drill pipe anti-torque testing device. On this basis, a testing method is also provided, which well overcomes the problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the coal drill pipe anti-torque testing device provided by the present invention comprises a coal drill pipe, and also comprises a control console, a power device, an axial force applying device, a torque speed testing device, and a loading device; the control console drives and connects to the power device; the power device, the axial force applying device and one end of the coal drill pipe are connected in sequence, and the control console controls the power device to apply torque to the coal drill pipe through the axial force applying device; the other end of the coal drill pipe is connected to the loading device, and the loading device applies torque to the coal drill pipe and makes the coal drill pipe follow the power device to generate anti-torque through the axial force applying device; the torque speed testing device is connected to the coal drill pipe to detect the anti-torque state of the coal drill pipe in real time; the torque speed testing device is connected to the control console to send the detected state data of the coal drill pipe to the control console to perform fault analysis on the coal drill pipe.

[0007] Furthermore, the power device, the axial force applying device, the coal drill rod, the torque and speed testing device, and the loading device are arranged on a fixed stand and the center heights are kept consistent.

[0008] Furthermore, the power device includes a variable frequency motor and a frequency converter; the frequency converter is connected to the variable frequency motor, and the input frequency of the variable frequency motor is adjusted by the frequency converter.

[0009] Furthermore, the axial force applying device includes a first shaft and a first angular contact ball bearing; one end of the left shaft is connected to the variable frequency motor, and the other end is connected to the first angular contact ball bearing, and the left shaft is driven to rotate in turn by the variable frequency motor, and the left shaft drives the coal drill rod to apply torque through the angular contact ball bearing, so that the coal drill rod is in a rotational torque state.

[0010] Furthermore, the axial force-applying device also includes a connecting disk, a force-applying bolt, a force plate, and a tensile pressure sensor; one end of the left shaft is connected to the variable frequency motor, and the other end passes through the connecting disk, the force plate, and the center of the tensile pressure sensor in sequence without contact and is connected to the first angular contact ball bearing; the force-applying bolt is placed inside the connecting disk; the feed amount of the left shaft is adjusted by the screw to apply axial force to the left shaft, and the axial force is transmitted to the coal drill pipe through the force plate, the tensile pressure sensor, and the first angular contact ball bearing in sequence, so that the coal drill pipe is in an axial thrust state.

[0011] Furthermore, the loading device includes a magnetic powder brake and a current regulator; the current regulator is connected to the control console, and the current regulator is cooperatively connected to the magnetic powder brake; the magnetic powder brake is connected to the coal drill rod; the current regulator is adjusted by the control console so that the magnetic powder brake provides torque to the coal drill rod.

[0012] Furthermore, the torque-speed testing device includes a torque-speed sensor, a connecting flange, a right shaft, a second bearing seat, and a second angular contact ball bearing; one end of the right shaft passes through the flange, the torque-speed sensor and is connected to the magnetic powder brake, and the other end is connected to the second angular contact ball bearing; the second angular contact ball bearing is connected to the coal drill pipe; the torque-speed sensor is connected to the console, and the detected anti-torque data of the coal drill pipe is transmitted to the console, which performs fault analysis on it.

[0013] In order to achieve the above-mentioned object, the present invention provides a test method for a coal drill pipe anti-torque test device; comprising:

[0014] By applying axial thrust and rotational torque to both ends of the coal drill pipe respectively, the coal drill pipe is put into a torque-resistant state under the action of axial thrust;

[0015] At the same time, the data of the coal drill pipe in the anti-torque state under the action of axial thrust is collected and sent to the control console in the form of a signal;

[0016] The console analyzes and judges the collected data.

[0017] Furthermore, the data of the coal drill pipe in the anti-torque state under the action of axial thrust is collected by the sensor.

[0018] Furthermore, the control console calculates the data through the calculation module, can analyze the data of the torque state of the coal drill pipe, and can determine the deformation and fracture faults of the coal drill pipe.

[0019] The coal drill pipe anti-torque testing device provided by the present invention loads the coal drill pipe with axial thrust and rotational torque, so that the coal drill pipe resists torque under the action of axial thrust. It can simulate the dual influence of axial thrust and rotational torque on the coal drill pipe, and at the same time, the anti-torque state of the coal drill pipe is detected and fault analyzed in real time, thereby greatly improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of the coal drill pipe anti-torque testing device.

[0022] The following is a description of the components in the accompanying drawings:

[0023] 100. Power device 200. Axial force device 300. Torque speed test device 400. Loading device 500. Fixed stand 600. Coal drill pipe 700. Control console 110. Frequency conversion motor 210. Left connecting plate 220. Force bolt 230. Left shaft 240. Left and right force plates 250. Bolt 260. Tension pressure sensor 270. Bearing left end force plate 280. First angular contact ball bearing 281. First bearing seat 290. First replacement joint 310. Torque speed sensor 320. Connection flange 330. Right shaft 340. Second bearing seat 350. Second angular contact ball bearing 360. Second replacement joint 410. Magnetic powder brake DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0025] The existing coal drill pipe anti-torque test device only performs anti-torque test on the coal drill pipe at the rated speed, and cannot simulate the dual influence of axial thrust and rotational torque on the coal drill pipe, and therefore cannot meet the requirements of measuring the actual use status of the coal drill pipe; therefore, the present invention provides a coal drill pipe anti-torque test device, which can simulate the dual influence of axial thrust and rotational torque on the coal drill pipe, and further improves the reliability of the device.

[0026] The coal drill pipe torque test device provided by this scheme is Figure 1 , which includes a control console 700 , a power device 100 , an axial force application device 200 , a torque and speed testing device 300 , a loading device 400 , a fixed stand 500 and a coal drill pipe 600 .

[0027] Among them, the control console 700 controls the power device 100 to apply torque to the coal drill pipe 600 through the axial force application device 200; the loading device 400 applies torque to the coal drill pipe 600 and makes the coal drill pipe 600 follow the power device 100 to generate anti-torque through the axial force application device 200; the torque and speed testing device 300 performs real-time detection of the speed and torque of the coal drill pipe 600.

[0028] Furthermore, the fixed stand 500 is a platform structure, which is an installation body, specifically used to install the power device 100, the axial force device 200, the coal drill pipe 600, the torque and speed testing device 300, and the loading device 400; the center heights of the various components are kept consistent through fixed installation with the fixed stand 500.

[0029] The specific structure of the fixed stand 500 is not limited here, and it can also be other structures, such as a vertical structure, a left-right structure, etc., as long as it can install the power device 100, the axial force device 200, the torque and speed testing device 300, the loading device 400, and the coal drill pipe 600, the specific details will not be repeated.

[0030] The power device 100 is arranged on a fixed stand 500, on which an internal spline is provided. The left shaft of the axial force applying device 200 is provided with an external spline. The internal spline on the power device 100 is key-connected with the external spline of the axial force applying device 200, and power can be transmitted to the axial force applying device 200 through the key connection; the power device 100 is composed of a variable frequency motor 110 and a frequency converter.

[0031] The frequency converter is connected to the variable frequency motor 100 and is used to adjust the input frequency of the variable frequency motor 100; wherein, in this scheme, the variable frequency motor 100 preferably adopts an 18kW variable frequency speed regulating motor, and the frequency converter uses 22kW / 660V. By matching the variable frequency motor 100 and the frequency converter with similar output power, the stability of the power device during use can be greatly improved.

[0032] The power device 100 can provide an adjustment range of any speed of (0 to 1500) r / min and any power of (0 to 18) kW.

[0033] The axial force applying device 200 is arranged on the fixed stand 500, one end of which is key-connected to the power device 100, and the other end is connected to the coal drill rod 600; the axial force applying device 200 is used to transmit the power of the power device 100 to the coal drill rod 600, driving the coal drill rod 600 to rotate.

[0034] The axial force applying device 200 includes a left connecting plate 210 , a force applying bolt 220 , a left shaft 230 , left and right force applying plates 240 , a tension pressure sensor 260 , a bearing left end force applying plate 270 , and a first angular contact ball bearing 280 .

[0035] Specifically, the left shaft 230 passes through the center of the left connecting plate 210, the force bolt 220, the left and right force plates 240, the tension pressure sensor 260, and the bearing seat end force plate 270. One end of the left shaft 230 is connected to the variable frequency motor 110 through an external spline, and the other end is connected to the inner ring of the first angular contact ball bearing 280 through an interference fit; the first angular contact ball bearing 280 is connected to the left end of the coal drill pipe through the first replacement joint 290.

[0036] The left shaft 230 is driven to rotate in sequence by the variable frequency motor 110 , and the left shaft 230 drives the coal drill pipe 600 to perform torque through the first angular contact ball bearing 280 , thereby completing the torque state of the coal drill pipe 600 .

[0037] It should be noted here that the left shaft 230 passes through the center of the left connecting plate 210, the force bolt 220, the left and right force plates 240, the tension pressure sensor 260, and the bearing seat end force plate 270 without contact. The contactless passage can ensure that when the left shaft 230 rotates with the variable frequency motor 110, only the inner ring of the first angular contact ball bearing 280 rotates under force, and the other components are fixed.

[0038] Furthermore, the force bolt 220 is placed inside the left connecting plate 210, and the left end of the force bolt 220 can be adjusted to feed the left shaft 230 through a screw; the right end of the force bolt 220 is in contact and connected with the left and right force plates 240; the left and right force plates 240 are cooperatively connected with the tension pressure sensor 260.

[0039] The force applied by the force bolt 220 on the left shaft 230 is uniformly adjusted by the screw, and the force bolt 220 can be rotated on the left shaft 230, that is, the force bolt 220 is adjusted to apply axial thrust to the left shaft 230 by rotating on the left shaft 230, and the axial force is applied to the left end of the tension pressure sensor 260 through the left and right force plates 240.

[0040] The force plate 270 at the left end of the bearing is matched and connected with the first angular contact ball bearing 280 ; the tension pressure sensor 260 applies the axial force to the outer ring of the first angular contact ball bearing 280 through the force plate 270 at the left end of the bearing.

[0041] Furthermore, the first angular contact ball bearing 280 is arranged on the fixed stand 500 through the first bearing seat 281, and at the same time, the left connecting plate 210, the left and right force plates 240, and the first bearing seat 281 are fixed together by three bolts 250 to bear the axial force.

[0042] The first angular contact ball bearing 280 is connected to the left end of the coal drill pipe by providing a first replacement joint 290 to transmit the axial force to the coal drill pipe 600 .

[0043] Therefore, the axial force-applying device composed of the above-mentioned components can uniformly adjust the feed amount of the force-applying bolt 220 on the left shaft 230 through the screw to apply axial thrust to the left shaft 230, and transmit the axial force to the left and right force plates 240, the tension pressure sensor 260, the bearing left end force plate 270, the first angular contact ball bearing 280 to the coal drill pipe 600 in sequence, thereby completing the working state of the coal drill pipe 600 being subjected to axial force.

[0044] Secondly, the axial force applying device 200 can also cooperate with the power device 100 to drive the main shaft 230 to rotate through the variable frequency motor 110, and in turn drive the first angular contact ball bearing 280 and the coal drill pipe 600 to rotate to complete the torque state of the coal drill pipe.

[0045] Here, the axial force applying device 200 can specifically provide a load with an adjustment range of (0 to 200) kN.

[0046] The loading device 400 is disposed at the other end of the fixed stand 500 and is used to provide a suitable torque to the coal drill pipe 600. The loading device 400 cooperates with the power device 100, and the coal drill pipe 600, which is like an axial thrust formed by the axial force applying device 500, follows the power device 100 to generate anti-torque.

[0047] The loading device 400 includes a magnetic powder brake 410 and a current regulator, wherein the current regulator is connected to the console 700, and the current regulator is matched with the magnetic powder brake 410; the magnetic powder brake 410 is connected to the coal drill pipe 600. The current regulator is adjusted by the console 700 so that the magnetic powder brake 410 provides a suitable torque to the coal drill pipe 600, so that the coal drill pipe 600 is in an anti-torque state through the magnetic powder brake 410 under the torque driven by the left shaft 230, and the rotation speed and torque of the coal drill pipe 600 are automatically recorded and transmitted to the console 700.

[0048] The torque and speed testing device 300 is the measurement and control center of the entire testing device, which is used to test the speed and torque of the coal drill pipe 600; the torque and speed testing device 300 includes a torque and speed sensor 310, a connecting flange 320, a right shaft 330, a second bearing seat 340, a second angular contact ball bearing 350, and a second replacement joint 360.

[0049] Specifically, one end of the right shaft 330 passes through the flange 320, and the torque speed sensor 310 is connected to the magnetic powder brake 410. The torque speed sensor 310 can detect the anti-torque state of the coal drill pipe 600 to be tested in real time, and send the detected digital signal to the console 700 for fault analysis of the coal drill pipe 600.

[0050] The other end of the right shaft 330 is connected to the inner ring of the second angular contact ball bearing 350 by interference fit; the second angular contact ball bearing 350 is connected to the right end of the coal drill pipe 600 by setting a second replacement joint 360; the second angular contact ball bearing 350 is set on the fixed stand 500 through the second bearing seat 340.

[0051] When the right shaft 330 is subjected to the axial thrust of the coal drill pipe 600, the axial force is transmitted to the outer ring through the inner ring of the second angular contact ball bearing 350, and the force is applied to the second bearing seat 340 and the connecting flange 320, thereby solving the problem that the torque speed sensor 310 cannot withstand the axial force.

[0052] The torque and speed testing device 300 can display the speed of (0-6000) r / min and the torque of (0-50) Nm.

[0053] The following example illustrates the working process of the present solution when in use; it should be noted that the following content is only a specific application example of the present solution and does not constitute a limitation on the present solution.

[0054] First, one end of the axial force device 200 is connected to the power device 100, and the other end is connected to the coal drill rod 600. One end of the torque speed test device 300 is connected to the loading device 400, and the other end is connected to the coal drill rod 600. The above equipment is set on a fixed stand 500, and the center heights of various components are kept consistent. Test operation is carried out, and abnormal left and right swings and up and down shakes are not allowed.

[0055] The feed amount of the force bolt 220 on the left shaft 230 is uniformly adjusted by the lead screw, and a certain pushing force is formed on the coal drill pipe 600 through the pull pressure sensor 260.

[0056] The control console 700 controls the variable frequency motor 110 to drive the left shaft 230 to drive the coal drill pipe 600 to operate; at the same time, the control console 700 adjusts the current regulator so that the magnetic powder brake 410 provides the coal drill pipe 600 with a suitable torque, so that the coal drill pipe 600 is in an anti-torque state, and automatically records the rotation speed and torque to be borne by the coal drill pipe 600; in this process, the tension and pressure sensor 260 detects the axial thrust in the rotation process in real time and feeds it back to the control console 700, and the control console 700 issues an instruction to the variable frequency motor 110 to change the speed according to the real-time axial thrust data, and controls the axial thrust fluctuation range to be less than 4% to 6%.

[0057] In addition, during the anti-torque test, the torque speed sensor 310 can detect the anti-torque state of the coal drill pipe to be tested in real time, and send the detected digital signal to the console 700. The console 700 has a digital calculation model inside, which can perform fault analysis on the coal drill pipe 600, and can automatically determine the deformation and fracture faults of the coal drill pipe, and output the results.

[0058] The coal drill pipe anti-torque test device formed by the above scheme has a compact structure and is easy to use. It integrates the dual effects of axial thrust and torque, effectively simulates the anti-torque environment of the coal drill pipe under a certain axial thrust, and detects the torque, axial thrust, deformation and fracture failures of the coal drill pipe, thereby greatly improving the reliability of the coal drill pipe anti-torque test device.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A coal drill pipe anti-torque testing device, comprising a coal drill pipe, characterized in that: It also includes a control console, a power device, an axial force device, a torque and speed testing device, and a loading device; the control console drives the power device; the power device includes a variable frequency motor, a frequency converter, and the axial force device and one end of the coal drill pipe are connected in sequence, and the control console controls the power device to apply torque to the coal drill pipe through the axial force device; the loading device includes a magnetic powder brake and a current regulator; The axial force applying device comprises a left shaft and a first angular contact ball bearing; one end of the left shaft is connected to a variable frequency motor, and the other end is connected to the first angular contact ball bearing, the variable frequency motor sequentially drives the left shaft to rotate, and the left shaft drives the coal drill rod through the angular contact ball bearing, so that the coal drill rod is in a rotating torque state; The axial force-applying device also includes a connecting plate, a force-applying bolt, a force-applying plate, and a tension pressure sensor; one end of the left shaft is connected to the variable frequency motor, and the other end passes through the connecting plate, the force-applying plate, and the center of the tension pressure sensor in sequence without contact and is connected to the first angular contact ball bearing; the force-applying bolt is placed inside the connecting plate; the feed amount of the left shaft is adjusted by the lead screw to apply an axial force to the left shaft, and the axial force is transmitted to the coal drill pipe in sequence through the force-applying plate, the tension pressure sensor, and the first angular contact ball bearing, so that the coal drill pipe is in an axial thrust state; The torque speed test device comprises a torque speed sensor, a connecting flange, a right shaft, a second bearing seat, a second angular contact ball bearing, and a second replacement joint. One end of the right shaft passes through the flange. The torque speed sensor is connected to the magnetic powder brake. The torque speed sensor can detect the anti-torque state of the coal drill pipe to be tested in real time, and send the detected digital signal to the control console for fault analysis of the coal drill pipe. The other end of the right shaft is connected to the inner ring of the second angular contact ball bearing through an interference fit; the second angular contact ball bearing is connected to the right end of the coal drill pipe by setting a second replacement joint; the second angular contact ball bearing is set on the fixed stand through a second bearing seat; When the right shaft is subjected to the axial thrust of the coal drill pipe, the axial force is transmitted to the outer ring through the inner ring of the second angular contact ball bearing, and the force is received by the second bearing seat and the connecting flange, thus solving the problem that the torque speed sensor cannot withstand the axial force; The other end of the coal drill rod is connected to a loading device, which applies torque to the coal drill rod and causes the coal drill rod to resist torque following the power device through an axial force-applying device; the torque-speed testing device is connected to the coal drill rod to detect the anti-torque state of the coal drill rod in real time; the torque-speed testing device is connected to a control console to send the detected state data of the coal drill rod to the control console to perform fault analysis on the coal drill rod.

2. A coal drill pipe anti-torque testing device according to claim 1, characterized in that: The power device, the axial force applying device, the coal drill rod, the torque and speed testing device, and the loading device are arranged on a fixed stand and the center heights are kept consistent.

3. A coal drill pipe anti-torque testing device according to claim 1, characterized in that: The frequency converter is connected to the variable frequency motor, and the input frequency of the variable frequency motor is adjusted by the frequency converter.

4. A coal drill pipe anti-torque testing device according to claim 1, characterized in that: The current regulator is connected to the control console, and the current regulator is matched with the magnetic powder brake; the magnetic powder brake is connected to the coal drill rod; the current regulator is adjusted by the control console so that the magnetic powder brake provides torque to the coal drill rod.

5. A test method for a coal drill pipe torque resistance test device, characterized in that: A coal drill pipe torque resistance testing device according to any one of claims 1 to 4 is implemented, and the testing method comprises: By applying axial thrust and rotational torque to both ends of the coal drill pipe respectively, the coal drill pipe is put into a torque-resistant state under the action of axial thrust; At the same time, the data of the coal drill pipe in the anti-torque state under the action of axial thrust is collected and sent to the control console in the form of a signal; The console analyzes and judges the collected data.

6. The test method of a coal drill pipe anti-torque test device according to claim 5, characterized in that: The data of the coal drill pipe in the anti-torque state under the action of axial thrust is collected through sensors.

7. The test method of a coal drill pipe anti-torque test device according to claim 5, characterized in that: The console calculates the data through the calculation module, can analyze the data of the torque state of the coal drill pipe, and can determine the deformation and fracture failure of the coal drill pipe.

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