阅读说明：本技术 利用压力检测的磁力保压控制器的磁力测试装置及方法 (Magnetic force testing device and method of magnetic pressure maintaining controller by using pressure detection ) 是由 李聪 *** 高明忠 刘贵康 陈领 吴年汉 杨明庆 赵乐 何志强 胡建军 李佳楠 于 2020-07-01 设计创作，主要内容包括：本发明涉及利用压力检测的磁力保压控制器的磁力测试装置及方法,包括压力测量装置、称重装置、支架、置物平台、距离度量部件和用于夹持磁力座的夹持机构,夹持机构安装在所述支架上并位于置物平台上方；夹持机构与置物平台之间的距离可调节,距离度量部件用于测量夹持机构与置物平台之间的距离；压力测量装置用于测量阀瓣对其向上的压力。本发明可测量磁力座与阀瓣在逐渐接近的整个过程中的磁力与距离的关系,可用于测试和比较不同磁场组合方式下保压控制器的磁力大小,对保压控制器的研究和性能改善具有重要意义。(The invention relates to a magnetic force testing device and a method of a magnetic force pressure maintaining controller by utilizing pressure detection, wherein the magnetic force testing device comprises a pressure measuring device, a weighing device, a bracket, a storage platform, a distance measuring component and a clamping mechanism for clamping a magnetic force seat, wherein the clamping mechanism is arranged on the bracket and is positioned above the storage platform; the distance between the clamping mechanism and the object placing platform is adjustable, and the distance measuring component is used for measuring the distance between the clamping mechanism and the object placing platform; the pressure measuring device is used for measuring the upward pressure of the valve clack. The invention can measure the relationship between the magnetic force and the distance of the magnetic seat and the valve clack in the whole process of gradually approaching, can be used for testing and comparing the magnetic force of the pressure maintaining controller in different magnetic field combination modes, and has important significance for the research and performance improvement of the pressure maintaining controller.)

1. Utilize magnetic force testing arrangement of magnetic force pressurize controller of pressure detection, its characterized in that: the device comprises a pressure measuring device, a support, a storage platform, a distance measuring component and a clamping mechanism for clamping a magnetic base, wherein the clamping mechanism is arranged on the support and positioned above the storage platform;

The distance between the clamping mechanism and the object placing platform is adjustable, and the distance measuring component is used for measuring the distance between the clamping mechanism and the object placing platform, and/or the displacement of the clamping mechanism, and/or the displacement of the object placing platform;

the pressure measuring device is used for measuring the upward pressure of the valve clack.

2. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 1, wherein: the pressure measuring device comprises a vertical rod and a pressure measuring probe arranged at the lower end of the vertical rod, the pressure measuring probe is positioned above the object placing platform, and the distance between the pressure measuring probe and the object placing platform is adjustable.

3. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 2, wherein: the vertical rod is detachably installed and fixed on the support.

4. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 1, 2 or 3, wherein: the clamping mechanism can move up and down relative to the support, and the distance measuring component comprises a displacement sensor, a distance sensor or a height scale mark arranged on the support.

5. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 4, wherein: the clamping mechanism is connected with the support in a sliding manner, and the output end of the linear driving mechanism is connected with the clamping mechanism.

6. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 1, wherein: the clamping mechanism is provided with a circular space for accommodating the magnetic base when being clamped, and the axis of the circular space is vertical to the horizontal plane.

7. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 6, wherein: the clamping mechanism is a hoop.

8. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 6 or 7, wherein: it also comprises a cylindrical core, and the magnetic base can be clamped between the cylindrical core and the clamping mechanism.

9. The magnetic force test device of a magnetic dwell controller using pressure detection as claimed in claim 1, wherein: the valve flap further comprises a second force measuring device, and the second force measuring device is used for measuring the downward acting force of the valve flap.

10. The method for testing a magnetic force test apparatus of a magnetic dwell controller using pressure detection as set forth in any one of claims 1 to 9, wherein: placing the weighing device on the object placing platform, and placing the valve clack on the weighing device; the clamping mechanism clamps the magnetic base;

the lower end of the vertical rod penetrates through the middle of the magnetic base, the lower end of the pressure measuring probe is in contact with the top surface of the valve clack, and the measured value of the pressure measuring probe is 0;

and moving the clamping mechanism downwards to enable the magnetic base to be synchronously lowered, and recording the height or displacement of the clamping mechanism and the measured values of the weighing device and the pressure measuring probe at corresponding moments in the lowering process.

Technical Field

The invention relates to the technical field of magnetic measurement equipment, in particular to a magnetic force testing device and method of a magnetic pressure maintaining controller by utilizing pressure detection.

Background

An important process of a rock coring drilling machine in deep coring is pressure-maintaining coring, a pressure-maintaining core is a precious sample in rock mechanics research, how to realize efficient pressure maintaining of the drilling machine is a development direction of the coring drilling machine, China makes many researches on the pressure-maintaining coring and the design of the drilling machine in recent years, and China makes ' one ' for one ' in the concept of ' five-protection ' coring proposed by xi peace academicians for the first time and then ' one ' for the pressure-maintaining coring. There are many techniques to be studied for the structural design of each part in the pressure-maintaining coring.

Patent document CN110847856A discloses a flap valve structure of pressure-maintaining coring device, in which the valve seat has magnetism to attract the valve flap to close. Because the valve clack is closed without depending on the gravity of the valve clack, the valve clack is not limited by the drilling direction. The magnetic force generated by the magnetomechanical machine is used for long-distance traction, and is an ideal unstructured traction device.

However, a testing device for measuring the magnetic force of the valve seat is absent at present, so that the reliability of magnetic closing cannot be further verified, and the improvement of the pressure maintaining controller of the coring device is hindered.

Because the magnetic valve seat of the pressure-maintaining coring device is complex in numerical simulation and actual analog simulation experiments, the dynamic stress condition of the magnetic valve seat under different magnetic field combinations is difficult to study, and the mechanical model is fuzzy, so that a simplified model of a pressure-maintaining controller is usually used for replacing the magnetic valve seat in the experiments. As shown in fig. 1, a simplified model of the holding pressure controller includes a disk-shaped valve flap (No. 7) and a cylindrical magnetic seat (No. 6). The valve seat magnetic field combination and the mechanical model of the pressure maintaining controller of the coring device are improved deeply by researching the magnetic force magnitude of the simplified model magnetic force field.

In addition, as shown in fig. 2 and 3, when the magnetic base (serial number 6) of the simplified model has magnetic fields in multiple directions (the arrows in the figure represent the magnetizing directions of the permanent magnets), the magnetic base (serial number 6) is formed by splicing a plurality of magnets (61), and how to measure the magnitude of the magnetic force applied to the valve flap by the whole magnetic base in the axial direction is unsolved by the prior art.

Disclosure of Invention

The present invention provides a magnetic force testing device and method for a magnetic pressure maintaining controller using pressure detection to solve the above technical problems.

The invention is realized by the following technical scheme:

the magnetic force testing device of the magnetic pressure maintaining controller utilizing pressure detection comprises a pressure measuring device, a support, a storage platform, a distance measuring component and a clamping mechanism for clamping a magnetic base, wherein the clamping mechanism is arranged on the support and positioned above the storage platform;

the distance between the clamping mechanism and the object placing platform is adjustable, and the distance measuring component is used for measuring the distance between the clamping mechanism and the object placing platform, and/or the displacement of the clamping mechanism, and/or the displacement of the object placing platform;

the pressure measuring device is used for measuring the upward pressure of the valve clack.

Further, the pressure measuring device comprises a vertical rod and a pressure measuring probe arranged at the lower end of the vertical rod, the pressure measuring probe is positioned above the object placing platform, and the distance between the pressure measuring probe and the object placing platform is adjustable.

Further, the vertical rod is detachably installed and fixed on the support.

Further, the clamping mechanism can move up and down relative to the support, and the distance measuring component comprises a displacement sensor, or a distance sensor, or a height scale mark arranged on the support.

Further, the magnetic force testing device of the magnetic pressure maintaining controller utilizing pressure detection further comprises a linear driving mechanism used for driving the clamping mechanism to vertically move, the clamping mechanism is connected with the support in a sliding mode, and the output end of the linear driving mechanism is connected with the clamping mechanism.

Furthermore, the clamping mechanism is provided with a circular space for accommodating the magnetic base when being clamped, and the axis of the circular space is vertical to the horizontal plane.

Preferably, the clamping mechanism is a clamp.

Further, the magnetic force testing device of the magnetic pressure maintaining controller utilizing pressure detection further comprises a cylindrical core, and the magnetic seat can be clamped between the cylindrical core and the clamping mechanism.

Further, the magnetic force testing device of the magnetic pressure maintaining controller utilizing pressure detection further comprises a second force measuring device, and the second force measuring device is used for measuring the downward acting force of the valve clack on the second force measuring device.

The testing method of the magnetic force testing device of the magnetic pressure maintaining controller by utilizing pressure detection is characterized in that a weighing device is arranged on a storage platform, and a valve clack is arranged on the weighing device; the clamping mechanism clamps the magnetic base;

The lower end of the vertical rod penetrates through the middle of the magnetic base, the lower end of the pressure measuring probe is in contact with the top surface of the valve clack, and the measured value of the pressure measuring probe is 0;

and moving the clamping mechanism downwards to enable the magnetic base to be synchronously lowered, and recording the height or displacement of the clamping mechanism and the measured values of the weighing device and the pressure measuring probe at corresponding moments in the lowering process.

Compared with the prior art, the invention has the following beneficial effects:

the magnetic force testing device is simple in structure and convenient to operate, and the pressure measuring device can be used for measuring the relation between the magnetic force and the distance when the magnetic force is larger than the gravity;

2, by adopting the combination of the pressure measuring device and the second force measuring device, the relationship between the magnetic force and the distance of the magnetic seat and the valve clack in the whole process of gradually approaching can be measured, the magnetic force of the pressure maintaining controller in different magnetic field combination modes can be tested and compared, and the magnetic force measuring device has important significance on the research and performance improvement of the pressure maintaining controller.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a schematic structural view of a simplified model of a pressure holding controller;

FIG. 2 is a three-dimensional view of the magnetic sockets of the simplified model when they are brought together;

FIG. 3 is an exploded view of the magnetic base of the simplified model;

FIG. 4 is a three-dimensional view of the first embodiment;

FIG. 5 is a schematic illustration of an embodiment in use;

FIG. 6 is a schematic view of the second embodiment in use;

FIG. 7 is a schematic structural view of a cylindrical core;

FIG. 8 is a three-dimensional view of a third embodiment;

FIG. 9 is a three-dimensional view of the fourth embodiment;

FIG. 10 is a three-dimensional view of the fifth embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.