Nuclear magnetic resonance equipment

Abstract

The utility model provides nuclear magnetic resonance equipment. The nuclear magnetic resonance equipment comprises a rack; the magnet chamber is arranged on the rack; the driving mechanism and the magnet chamber are arranged on the rack in a spaced mode in the first horizontal direction; the supporting frame is connected with the driving mechanism, and the driving mechanism is used for driving the supporting frame to enter the magnet chamber in the first horizontal direction; the support frame has an initial position; the first limiting assembly is connected with the initial position of the supporting frame; the second limiting assembly is arranged on the supporting frame; the first limiting assembly and the second limiting assembly are used for making contact with the two ends, in the first horizontal direction, of the to-be-detected rock core so as to jointly limit movement of the to-be-detected rock core in the first horizontal direction. According to the nuclear magnetic resonance equipment provided by the invention, the first limiting assembly provides a fixed reference point for the initial position of the to-be-measured rock core, the repeatability of measurement is improved, and the first limiting assembly and the second limiting assembly ensure accurate measurement of different positions of the to-be-measured rock core in the depth direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas field exploitation, and particularly relates to a nuclear magnetic resonance device. BACKGROUND

[0002] Nuclear magnetic resonance technology is a non-destructive detection method widely used in the fields of material science, chemical analysis, medical imaging and the like. In geological research, nuclear magnetic resonance technology can be used to analyze the physical properties of rock samples, such as porosity, permeability and fluid saturation and the like. These parameters are of great significance for evaluating reservoir quality and predicting oil and gas resources.

[0003] In the prior art, the nuclear magnetic resonance device comprises a placing platform, a clamp, a driving part and a magnet chamber; the placing platform is connected with the clamp and the driving part respectively, the clamp is used for clamping a to-be-measured core, and the driving part is used for pushing the fixed to-be-measured core into the magnet chamber for measurement.

[0004] However, the inventor found in the implementation of the present application that, in the clamping process using the clamp, it is difficult to ensure that the starting end of the to-be-measured core is in exactly the same position each time of measurement, which not only leads to poor repeatability of the measurement results, but also, when accurate measurement of a specific position in the depth direction of the to-be-measured core is required, a slight deviation in the position will directly affect the final distribution spectrum drawing, and further affect the accuracy of the measurement results. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the embodiments of the present application is to provide a nuclear magnetic resonance device to solve the technical problem that the existing nuclear magnetic resonance device cannot ensure that the starting end of the to-be-measured core is in exactly the same position each time of measurement, which affects the repeatability and accuracy of the measurement results.

[0006] To solve the above technical problem, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a nuclear magnetic resonance device, comprising:

[0008] a rack;

[0009] a magnet chamber arranged in the rack;

[0010] a driving mechanism arranged in the rack along a first horizontal direction and spaced apart from the magnet chamber;

[0011] a support frame connected with the driving mechanism, the driving mechanism being used to drive the support frame to enter the magnet chamber along the first horizontal direction; the support frame has an initial position;

[0012] a first limiting component connected with the initial position of the support frame;

[0013] A second limiting component is arranged on the support frame; the first limiting component and the second limiting component are respectively arranged to contact two ends of the core along the first horizontal direction, so as to jointly limit the movement of the core along the first horizontal direction.

[0014] In some embodiments, further comprising:

[0015] A locking component is connected with the second limiting component and the support frame.

[0016] The second limiting component is movably connected with the support frame, so as to adjust the distance between the second limiting component and the first limiting component; the locking component is arranged to limit the movement of the second limiting component.

[0017] In some embodiments, the second limiting component is movably connected with the support frame along the first horizontal direction; the support frame is provided with a strip-shaped through hole, and the length direction of the through hole is the same as the first horizontal direction.

[0018] The locking component comprises:

[0019] A screw rod is connected with the second limiting component at a first end, and a second end of the screw rod extends out of the through hole.

[0020] A nut is threadedly connected with the second end of the screw rod, and the nut is capable of abutting against the support frame.

[0021] In some embodiments, the second limiting component comprises:

[0022] A lead screw, and the length direction of the lead screw is the same as the first horizontal direction.

[0023] The support frame is provided with a threaded hole, a first end of the lead screw is threadedly connected with the support frame through the threaded hole, and a second end of the lead screw is arranged to contact the core; the lead screw and the threaded hole jointly form the locking component.

[0024] In some embodiments, the second limiting component comprises:

[0025] A spring is connected with the support frame at a first end, and a second end of the spring is arranged to contact the core.

[0026] In some embodiments, further comprising:

[0027] Two third limiting members are arranged between the first limiting component and the second limiting component, and the two third limiting members are arranged on the support frame along a second horizontal direction.

[0028] Two third limiters are respectively used to contact two sides of the core along the second horizontal direction, so as to limit the movement of the core along the first horizontal direction.

[0029] In some embodiments, the third limiter comprises:

[0030] An elastic member, two ends of which are respectively connected with the first limiting assembly and the second limiting assembly.

[0031] In some embodiments, the support frame has an arc-shaped bearing surface for bearing the core, an axis of the bearing surface being the same as the first horizontal direction, and the bearing surface forming the two third limiters; and / or,

[0032] The support frame is provided with a measurement unit for measuring the size of the core along the first horizontal direction.

[0033] In some embodiments, further comprising:

[0034] A distance sensor, which is arranged at the rack along the first horizontal direction, and a detection end of the distance sensor is used to face the end surface of the core;

[0035] A controller, which is connected with the distance sensor, and the distance sensor can convert the detected distance signal into a first signal, and the controller is used to acquire the first signal.

[0036] In some embodiments, further comprising:

[0037] A protection cabin, which is connected with the rack to form a containing space, and the magnet chamber, the driving mechanism, the support frame, the first limiting assembly and the second limiting assembly are all arranged in the containing space; the protection cabin has an operation window, which is used to open or close the containing space.

[0038] Compared with the prior art, the nuclear magnetic resonance device provided by the application drives the support frame to move accurately along the first horizontal direction through the driving mechanism, ensures that the to-be-measured core on the support frame can accurately enter and exit the magnet chamber, and realizes measurement of different positions in the depth direction of the to-be-measured core. The first limiting component is located at the initial position of the support frame, provides a fixed reference point for the starting position of the to-be-measured core, ensures that the starting position of the to-be-measured core is consistent during each measurement, thereby improving the repeatability of the measurement, and lays a foundation for accurate measurement of different positions in the depth direction of the to-be-measured core. The first limiting component and the second limiting component jointly limit the movement of the to-be-measured core along the first horizontal direction, prevent displacement of the to-be-measured core during measurement, ensure accurate measurement of different positions in the depth direction of the to-be-measured core, ensure the accuracy of the final distribution spectrum drawing, and thereby ensure the accuracy of the measurement result. BRIEF DESCRIPTION OF DRAWINGS

[0039] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein like reference numerals refer to like elements or parts throughout. In the drawings:

[0040] Figure 1 A structural schematic view of an embodiment of the nuclear magnetic resonance device of the present application is schematically shown;

[0041] Figure 2 A structural schematic view of another embodiment of the nuclear magnetic resonance device of the present application is schematically shown;

[0042] Figure 3 A structural schematic view of another embodiment of the nuclear magnetic resonance device of the present application is schematically shown;

[0043] Figure 4 A structural schematic view of another embodiment of the nuclear magnetic resonance device of the present application is schematically shown;

[0044] Figure 5 A structural schematic view of another embodiment of the nuclear magnetic resonance device of the present application is schematically shown.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 1, rack; 11, bearing; 12, mounting; 13, fixing; 2, magnet chamber; 21, control panel; 3, driving mechanism; 31, control system; 4, support frame; 41, support; 42, connecting piece; 5, first limiting assembly; 6, second limiting assembly; 61, screw; 62, spring; 63, first limiting plate; 64, second limiting plate; 7, third limiting piece; 8, measuring part; 9, distance sensor; 10, controller; 20, protection cabin; 201, operation window; 30, core to be measured; A, first horizontal direction; B, second horizontal direction. DETAILED DESCRIPTION

[0047] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0048] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs.

[0049] As shown in Figures 1 to 5 The embodiment 2 of the present application provides a nuclear magnetic resonance device, comprising:

[0050] a rack 1;

[0051] a magnet chamber 2 disposed on the rack 1;

[0052] a driving mechanism 3 disposed on the rack 1 and spaced apart from the magnet chamber 2 along a first horizontal direction A;

[0053] a support frame 4 connected with the driving mechanism 3, the driving mechanism 3 being used to drive the support frame 4 to enter the magnet chamber 2 along the first horizontal direction A; the support frame 4 having an initial position;

[0054] a first limiting assembly 5 connected with the initial position of the support frame 4;

[0055] a second limiting assembly 6 disposed on the support frame 4; the first limiting assembly 5 and the second limiting assembly 6 being respectively used to contact two ends of the core to be measured 30 along the first horizontal direction A, so as to jointly limit the movement of the core to be measured 30 along the first horizontal direction A.

[0056] The first horizontal direction A of the present application is the axial direction (i.e. the depth direction) of the rock sample to be measured 30, and the second horizontal direction B is the radial direction of the core to be measured 30.

[0057] Specifically, the rack 1 is used to provide a stable support platform to ensure the fixation of various components such as the magnet chamber 2, the driving mechanism 3, the support frame 4, etc. The rack 1 can include a carrier 11, a mounting piece 12, and two fixing pieces 13. The carrier 11 can have a horizontal placement surface, and the magnet chamber 2, the mounting piece 12, and the two fixing pieces 13 can all be arranged on the placement surface. The two fixing pieces 13 are arranged at intervals along the first horizontal direction A, and the two fixing pieces 13 can be arranged on the placement surface by means of bolting or clamping, with the magnet chamber 2 located between the two fixing pieces 13. One fixing piece 13 is arranged between the mounting piece 12 and the magnet chamber 2, and the driving mechanism 3 is arranged on the mounting piece 12, which can be fixedly arranged on the carrier surface by means of bolting or clamping.

[0058] The magnet chamber 2 is used to provide a highly uniform static magnetic field to enable the nuclear magnetic moments in the core 30 under test to be effectively excited and detected. The magnet chamber 2 can be arranged at a position in the middle of the carrier 11 along the first horizontal direction A to make the overall device more stable. The magnet chamber 2 can be connected to the placement surface by means of bolting or other fasteners. The magnet chamber 2 can be located in the middle of the two fixing pieces 13 along the first horizontal direction A, and can be spaced apart from the two fixing pieces 13. The specific structure of the magnet chamber 2 is mastered by those skilled in the art, and will not be described here. The control panel 21 of the magnet chamber 2 is arranged on the rack 1 and is used to set and adjust various parameters of the magnet chamber 2, such as magnetic field strength, radio frequency pulse parameters, temperature control, etc.

[0059] The driving mechanism 3 is used to drive the support frame 4 to move accurately along the first horizontal direction A to ensure that the core 30 under test on the support frame 4 can accurately enter and exit the magnet chamber 2. The driving mechanism 3 can be connected to the mounting piece 12 by means of bolting or riveting, and can be connected to the support frame 4 by means of clamping or adhesion. The driving mechanism 3 can be selected from a stepper motor, a servo motor, or a hydraulic cylinder, etc., among which a stepper motor with relatively large driving force and high accuracy is preferred. The control system 31 of the driving mechanism 3 can be arranged on the rack 1, and the step distance of each driving can be set through the control system 31 of the driving mechanism 3. For example, in continuous depth measurement, 0.1 mm can be set as the step distance of each driving, and the interval time between each driving can be set to ensure the accuracy and stability of the measurement. For example, 1 second can be set as the waiting time after each driving before the next driving.

[0060] The support frame 4 is used to support the to-be-tested core 30, ensure that the to-be-tested core 30 remains stable during the measurement process, and ensure the accuracy and repeatability of the final test results. The two fixing members 13 can each be provided with a slide extending along the first horizontal direction A, and the support frame 4 can be slidably connected to the two fixing members 13 along the first horizontal direction A through the slide. The support frame 4 can be in the shape of a strip extending along the first horizontal direction A. The support frame 4 can be made of a non-magnetic metal, such as aluminum or copper, or a non-metallic material, such as plastic or carbon fiber, to ensure the accuracy of the final test results of the to-be-tested core 30.

[0061] The first limiting component 5 is used to contact at least part of the first end surface of the to-be-tested core 30. The first limiting component 5 is located at the initial position of the support frame 4, which is the reference position of the support frame 4 when it has not entered the magnet chamber 2, and is used to determine the starting position of the to-be-tested core 30 to ensure that the starting position of the to-be-tested core 30 is consistent each time the measurement is taken, thereby improving the repeatability and accuracy of the measurement. By setting the initial position, the starting position of the to-be-tested core 30 is ensured to be the same each time the measurement is taken. When the measurement is started, the support frame 4 can first be driven by the driving mechanism 3 to drive a preset distance along the first horizontal direction A, so that the first end of the to-be-tested core 30 enters the magnet chamber 2 for measurement, and then continuous depth measurement is performed to comprehensively evaluate the physical properties of the to-be-tested core 30 and provide more abundant data support. The preset distance can be obtained through the design parameters of the equipment; or, a standard sample with a known size can be placed on the support frame 4, the driving mechanism 3 is started, the support frame 4 is gradually driven, and the movement distance when the first end of the standard sample just enters the magnet chamber 2 is recorded. The movement distance is the preset distance. The nuclear magnetic resonance equipment further comprises a display connected in signal with the magnet chamber 2, and the result detected by the magnet chamber 2 when the first end of the standard sample just enters the magnet chamber 2 is displayed on the display. The measurement is confirmed to have started by reading the display.

[0062] The initial position of the support frame 4 can be provided with a fixing hole, and the first limiting component 5 can be fixedly connected with the support frame 4 through the fixing hole and a bolt; or, the initial position of the support frame 4 can be provided with a slot, and the first limiting component 5 can be inserted with the support frame 4 through the slot. The first limiting component 5 can be in the shape of a plate, a strip or other shapes, wherein the plate-shaped first limiting component 5 can increase the contact area with the to-be-tested core 30 and enhance the limiting effect. The dimension of the first limiting component 5 along the vertical direction is smaller than the dimension of the magnet chamber 2 along the vertical direction, so as to ensure that the first limiting component 5 can enter the magnet chamber 2.

[0063] The second limiting component 6 is used to contact at least part of the second end of the core 30 to be measured, so that the second limiting component 6 and the first limiting component 5 can clamp the core 30 to be measured, thereby jointly limiting the movement of the core 30 to be measured along the first horizontal direction A. The second limiting component 6 can be fixedly connected with the support frame 4 by bolts or other fasteners; or the second limiting component 6 can be inserted with the support frame 4. The second limiting component 6 can be in the shape of a plate, a strip or other shapes, wherein the plate shape can increase the contact area with the core 30 to be measured and enhance the limiting effect. The size of the second limiting component 6 along the vertical direction is smaller than the size of the magnet chamber 2 along the vertical direction, so as to ensure that the second limiting component 6 can enter the magnet chamber 2.

[0064] The material selection of the first limiting component 5 and the second limiting component 6 can refer to the support frame 4.

[0065] Compared with the prior art, the nuclear magnetic resonance device provided by Embodiment 2 of the present application drives the support frame 4 to move accurately along the first horizontal direction A by the driving mechanism 3, ensures that the core 30 to be measured on the support frame 4 can accurately enter and exit the magnet chamber 2, and realizes the measurement of different positions in the depth direction of the core 30 to be measured. The first limiting component 5 is located at the initial position of the support frame 4, provides a fixed reference point for the starting position of the core 30 to be measured, ensures that the starting position of the core 30 to be measured is consistent during each measurement, thereby improving the repeatability of the measurement, and at the same time lays a foundation for accurate measurement of different positions in the depth direction of the core 30 to be measured. The first limiting component 5 and the second limiting component 6 jointly limit the movement of the core 30 to be measured along the first horizontal direction A, prevent the displacement of the core 30 to be measured during the measurement, ensure the accurate measurement of different positions in the depth direction of the core 30 to be measured, and ensure the accuracy of the final distribution spectrum drawing, thereby ensuring the accuracy of the measurement result.

[0066] As shown in Figure 2 some embodiments, further comprising:

[0067] a locking component (not shown in the figure) connected with the second limiting component 6 and the support frame 4;

[0068] wherein the second limiting component 6 is movably connected with the support frame 4 to adjust the distance from the first limiting component 5; and the locking component is used to limit the movement of the second limiting component.

[0069] Specifically, the locking component is used to fix the second limiting component 6 to prevent displacement of the second limiting component 6 during the measurement. The movable connection of the second limiting component 6 and the cooperation of the locking component make the device suitable for cores 30 to be measured of different sizes, thereby improving the versatility and flexibility of the device and being suitable for various measurement tasks.

[0070] AsFigure 2 As shown, in some embodiments, the second limiting component 6 is slidably connected to the support frame 4 along the first horizontal direction A; the support frame 4 has a strip-shaped through hole, the length direction of which is the same as the first horizontal direction A;

[0071] The locking component includes:

[0072] A screw (not shown in the figure) has its first end connected to the second limiting component 6, and its second end extends out of the through hole;

[0073] A nut (not shown in the figure) is threaded to the second end of the screw, and the nut is able to abut against the support frame 4.

[0074] Specifically, the support frame 4 forms a through hole in the vertical direction. The support frame 4 can be configured with a sliding groove extending in the first horizontal direction A. The second limiting component 6 is slidably connected to the support frame 4 in the first horizontal direction A through the sliding groove to adjust the distance between the first limiting component 5 and the second limiting component 6. The first end of the screw can be interference-fitted with or bonded to the second limiting component 6.

[0075] Before starting the measurement, unscrew the nut. At this time, the second limiting component 6 slides along the first horizontal direction A, and the screw moves within the through hole along the first horizontal direction A. When the second limiting component 6 contacts the second end of the core sample 30 to be measured, screw the nut in, so that the nut abuts against the support frame 4, restricting the movement of the second limiting component 6. It is suitable for measuring multiple sizes, highly practical, and simple to operate.

[0076] like Figure 2 As shown, in some embodiments, the second limiting component 6 includes:

[0077] Lead screw 61, the length direction of which is the same as the first horizontal direction A;

[0078] The support frame 4 is provided with a threaded hole, and the first end of the lead screw 61 is threadedly connected to the support frame 4 through the threaded hole. The second end of the lead screw 61 is used to contact the core 30 to be tested. The lead screw 61 and the threaded hole together form the locking assembly.

[0079] Specifically, the support frame 4 may include a support member 41 and a connector 42. The support member 41 is slidably connected to two fixing members 13 along a first horizontal direction A. The support member 41 has a support surface. The connector 42 and the first limiting component 5 are both disposed on the support surface and are arranged at intervals along the first horizontal direction A. The drive mechanism 3 is connected to the support member 41 and / or the connector 42.

[0080] The connecting piece 42 can be connected with the supporting piece 41 by means of bolts or interference fit, the connecting piece 42 is provided with a threaded hole, and the first end of the lead screw 61 is connected with the connecting piece 42 through the threaded hole; the distance between the first limiting assembly 5 and the lead screw 61 is adjusted by rotating the lead screw 61. The second limiting assembly 6 can further include a first limiting plate 63, the first limiting plate 63 is interference fit or bonded with the second end of the lead screw 61, and the second end of the lead screw 61 is in contact with the second end of the measured core 30 through the first limiting plate 63, so as to increase the contact area of the two and ensure the limiting effect.

[0081] As shown in Figure 3 in some embodiments, the second limiting assembly 6 includes:

[0082] The spring 62 has a first end connected with the supporting frame 4, and a second end used for contacting the measured core 30.

[0083] Specifically, the spring 62 is telescopic along the first horizontal direction A. The first end of the spring 62 can be connected with the connecting piece 42 by means of bolts or clamping. The second limiting assembly 6 can further include a second limiting plate 64, the second limiting plate 64 is interference fit or bonded with the second end of the lead screw 61, and the second end of the spring 62 can be clamped or bolted with the second limiting plate 64. The spring 62 can be in contact with the second end of the measured core 30 through the second limiting plate 64, so as to increase the contact area of the two and ensure the limiting effect.

[0084] As shown in Figure 4 in some embodiments, the second limiting assembly 6 includes:

[0085] Two third limiting pieces 7 are located between the first limiting assembly 5 and the second limiting assembly 6, and the two third limiting pieces 7 are spaced apart along the second horizontal direction B and arranged on the supporting frame 4.

[0086] The two third limiting pieces 7 are respectively used for contacting two sides of the measured core 30 along the second horizontal direction B, so as to jointly limit the movement of the measured core 30 along the first horizontal direction A, and the second horizontal direction B is perpendicular to the first horizontal direction A.

[0087] Specifically, the first limiting assembly 5, the second limiting assembly 6 and the two third limiting pieces 7 jointly form a limiting space, and the measured core 30 is located in the limiting space. The third limiting piece 7 can be in the shape of a plate, a strip or other shapes. The third limiting piece 7 can be fixedly arranged on the supporting piece 41 by means of bolts or clamping.

[0088] The third limiting member 7 can be spaced apart from the first limiting component 5 and the second limiting component 6 respectively; or, when the second limiting component 6 is fixedly installed on the support member 41, the third limiting member 7 can be connected to the first limiting component 5 and the second limiting component 6 respectively to enhance the stability of the overall structure; or, when the second limiting component 6 is movably installed on the support member 41, the third limiting member 7 can be connected to the first limiting component 5 and spaced apart from the second limiting component 6.

[0089] like Figure 4 As shown, in some embodiments, the third limiting member 7 includes:

[0090] The elastic element is connected at both ends to the first limiting component 5 and the second limiting component 6, respectively.

[0091] Specifically, the elastic element is strip-shaped; for example, it can be a rubber strip or a spring. The length direction of the elastic element can be the same as the first horizontal direction A, and both ends of the elastic element can be connected to the two limiting components via hooks or rings. Due to its deformation characteristics, the elastic element can adapt to the movable connection between the second limiting component 6 and the frame 1. Furthermore, the elastic element can produce slight deformation in the second horizontal direction B, enabling it to adapt to different dimensions of the core sample 30 along the second horizontal direction B, thus providing greater adaptability.

[0092] like Figures 1 to 4 As shown, in some embodiments, the support frame 4 has an arc-shaped bearing surface for supporting the core sample 30, the axis of the bearing surface being the same as the first horizontal direction A, and the bearing surface forming two of the third limiting members 7; and / or,

[0093] The support frame 4 is equipped with a measuring unit 8, which is used to measure the dimensions of the core sample 30 along the first horizontal direction A.

[0094] Specifically, the support 41 has an arc-shaped bearing surface, the shape of which matches the outer contour of the core sample 30 to be tested, to ensure that the core sample 30 can fit snugly against the bearing surface when placed, reducing shaking and displacement. The support 41 can be formed by injection molding or compression molding to create the arc-shaped bearing surface.

[0095] The measuring part 8 can be etched onto the surface of the support 41 using a laser etching machine; alternatively, it can be printed onto the surface of the support 41. The starting position of the measuring part 8 can be aligned with the end face of the first end of the core 30 to be measured. The operator can intuitively see the size of the core 30 and its position during measurement, providing a real-time feedback mechanism, enhancing the control capability of the drive mechanism 3, and ensuring the smooth progress of the measurement.

[0096] like Figure 1 As shown, in some embodiments, it also includes:

[0097] A distance sensor 9 is arranged on the rack 1 in the first horizontal direction A away from the support frame 4, and a detection end of the distance sensor 9 is configured to face the end surface of the core 30 to be measured.

[0098] A controller 10 is connected to the distance sensor 9, and the distance sensor 9 is configured to convert the detected distance signal into a first signal, and the controller 10 is configured to acquire the first signal.

[0099] Specifically, the distance sensor 9 can be arranged on the mounting 12 by means of bolts or adhesion, and the detection end of the distance sensor 9 can face the first end surface or the second end surface of the core 30 to be measured. For example, the second limiting assembly 6 is in contact with part of the second end surface of the core 30 to be measured, and the detection end of the distance sensor 9 faces another part of the second end surface of the core 30 to be measured. The distance sensor 9 can be an infrared distance sensor 9 or a laser sensor.

[0100] The controller 10 can be embedded in the carrier 11. The controller 10 can be a controller 10 configured in a nuclear magnetic resonance device in the prior art, which is connected to the magnet chamber 2 and can acquire and store the measurement results each time, so as to ensure accurate recording and processing of the measurement data. The controller 10 is configured with a display screen for displaying the measurement results.

[0101] During continuous measurement, the distance sensor 9 can monitor the position of the core 30 to be measured in real time, so as to ensure the accuracy of the position during each measurement and the accuracy of the final detection results.

[0102] As shown in Figure 5 some embodiments, further comprising:

[0103] A protective cabin 20 is connected to the rack 1 to form a containing space, and the magnet chamber 2, the driving mechanism 3, the support frame 4, the first limiting assembly 5 and the second limiting assembly 6 are arranged in the containing space. The protective cabin 20 has an operation window 201 for opening or closing the containing space.

[0104] Specifically, the protective cabin 20 is configured to maintain the cleanliness inside the containing space, prevent dust and impurities from the outside from entering, and prevent the increase in safety, so that the nuclear magnetic resonance device is suitable for measurement on a drilling site. The protective cabin 20 can be made of a non-magnetic and corrosion-resistant material, such as aluminum or plastic. The operation window 201 can be rectangular or circular, and the operation window 201 can be opposite to the support frame 4 for the convenience of the operator. The operation window 201 can be rotatably or slidably connected to the protective cabin 20, and a sealing strip can be arranged at the edge of the operation window 201 to ensure the sealing property.

[0105] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A nuclear magnetic resonance apparatus characterized by comprising: The device comprises: a rack; a magnet chamber arranged in the rack; a driving mechanism arranged in the rack and spaced apart from the magnet chamber along a first horizontal direction; a support frame connected with the driving mechanism, the driving mechanism being configured to drive the support frame to enter the magnet chamber along the first horizontal direction; the support frame has an initial position; a first limiting component connected with the initial position of the support frame; a second limiting component arranged in the support frame; the first limiting component and the second limiting component are respectively configured to contact two ends of a core to be tested along the first horizontal direction, so as to jointly limit the movement of the core to be tested along the first horizontal direction.

2. The nuclear magnetic resonance apparatus according to claim 1, characterized by, Further comprising: a locking component connected with the second limiting component and the support frame; wherein the second limiting component is movably connected with the support frame to adjust the distance between the second limiting component and the first limiting component; and the locking component is configured to limit the movement of the second limiting component.

3. The nuclear magnetic resonance apparatus according to claim 2, characterized by The second limiting component is movably connected with the support frame along the first horizontal direction; the support frame has a strip-shaped through hole, and the length direction of the through hole is the same as the first horizontal direction; the locking component comprises: a screw rod, a first end of the screw rod being connected with the second limiting component, and a second end of the screw rod extending out of the through hole; a nut, the second end of the screw rod being threadedly connected with the nut, and the nut being capable of abutting against the support frame.

4. The nuclear magnetic resonance apparatus according to claim 2, characterized by The second limiting component comprises: a lead screw, the length direction of the lead screw being the same as the first horizontal direction; wherein the support frame is provided with a threaded hole, a first end of the lead screw being threadedly connected with the support frame through the threaded hole, and a second end of the lead screw being configured to contact the core to be tested; and the lead screw and the threaded hole jointly form the locking component.

5. The nuclear magnetic resonance apparatus according to claim 1, characterized by, The second limiting component comprises: a spring, a first end of the spring being connected with the support frame, and a second end of the spring being configured to contact the core to be tested.

6. The nuclear magnetic resonance apparatus according to claim 1, characterized by Further comprising: two third limiting members, both of which are located between the first limiting component and the second limiting component, and both of which are arranged in the support frame along a second horizontal direction; wherein the two third limiting members are respectively configured to contact two sides of the core to be tested along the second horizontal direction, so as to jointly limit the movement of the core to be tested along the first horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

7. The nuclear magnetic resonance apparatus according to claim 6, characterized by The third limiting member comprises: a resilient member, both ends of the resilient member being connected with the first limiting component and the second limiting component respectively.

8. The nuclear magnetic resonance device according to claim 6, wherein the support frame has an arc-shaped bearing surface for bearing the core to be tested, an axis of the bearing surface being the same as the first horizontal direction, and the bearing surface forms the two third limiting members; and / or the support frame is provided with a measuring portion, the measuring portion being configured to measure the size of the core to be tested along the first horizontal direction.

9. The nuclear magnetic resonance apparatus of claim 1 wherein, Further comprising: a distance sensor, the distance sensor being arranged in the rack and spaced apart from the support frame along the first horizontal direction; a detection end of the distance sensor being configured to face an end surface of the core to be tested. A controller is connected with the distance sensor, the distance sensor can convert the detected distance signal into a first signal, and the controller is used for acquiring the first signal.

10. The nuclear magnetic resonance apparatus of claim 1 wherein, Further comprising: A protection cabin is connected with the frame to form a containing space, the magnet chamber, the driving mechanism, the support frame, the first limiting component and the second limiting component are all arranged in the containing space; the protection cabin has an operation window, and the operation window is used for opening or closing the containing space.

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