Movable gas hydrate nuclear magnetic resonance apparatus and detection method thereof

Abstract

The application discloses a movable gas hydrate nuclear magnetic resonance device and a detection method thereof. The device comprises a shell and a nuclear magnetic resonance device body. A lifting support structure is arranged in the shell. A moving frame is connected to the lifting support structure. The nuclear magnetic resonance device body is fixedly connected to the moving frame. A wire slot is arranged on the inner side of the shell. The wire slot is used for penetrating a cable connected to the nuclear magnetic resonance device body. The lifting support structure comprises a plurality of push rod shafts. A driving structure capable of driving each push rod shaft to rotate is connected to each push rod shaft. The moving frame is sleeved on each push rod shaft. The moving frame can be driven to move up and down along the central axis of the push rod shaft to drive the nuclear magnetic resonance device body to move up and down. The real-time state in the pipeline is monitored through the movement of the nuclear magnetic resonance device body, which is more in line with the actual situation. The movement of the nuclear magnetic resonance device body is realized through the control of the driving structure, and the multi-condition and multi-angle characteristics of the gas hydrate can be researched.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas hydrate microscopic research, and particularly relates to a movable gas hydrate nuclear magnetic resonance device and a detection method thereof. BACKGROUND

[0002] With the decrease of oil and gas resources and the increase of consumption, the world energy is in shortage and the environmental problems are prominent, and developing new energy and energy saving and environmental protection become the focus of attention. At present, the problem of solving energy demand is imminent. Developing and utilizing new clean energy and reducing the negative impact of energy use and technology development on the environment are the main way to solve the energy problem.

[0003] Natural gas hydrate is favored due to its huge resource reserves, relatively realistic resource development technology, and simultaneous exploration and production with conventional oil and gas. The scientific community generally believes that natural gas hydrate will become a very potential clean energy in the future. CO2 hydrate gradually enters people's field of vision. Because the density of CO2 hydrate is greater than that of water, and the high pressure and low temperature conditions of the marine environment are suitable for the generation and stability of hydrate, CO2 can be permanently stored in the seabed by using hydrate. Therefore, from the aspects of energy and environmental protection, it is necessary to further improve the understanding of gas hydrate.

[0004] Nuclear magnetic resonance provides macroscopic and microscopic information for the related research of gas hydrate. As one of the key tools for observing the molecular level and microscopic structure of hydrate at present, nuclear magnetic resonance and its derived nuclear magnetic resonance imaging technology have gradually shown their value in the research of guest and hydrate structure analysis, guest interaction, phase transition, hydrate dynamics and thermodynamic process, temperature measurement, hydrate generation and decomposition process and other fields.

[0005] The conventional nuclear magnetic resonance experimental device is fixed, and the state of the deposition layer at different positions is detected by changing the position of the reaction kettle. However, in actual industrial application, the position of the pipeline cannot be changed, and the real-time state in the pipeline cannot be monitored.

[0006] Therefore, the present application is proposed by the present inventor with years of experience and practice in the relevant industry to overcome the defects of the prior art. SUMMARY

[0007] The present application aims to provide a movable gas hydrate nuclear magnetic resonance device and a detection method thereof. The real-time state in the pipeline is monitored by moving the nuclear magnetic resonance equipment body, which is more practical. The precise movement of the nuclear magnetic resonance equipment body is realized by controlling the driving structure, the moving speed and the distance of each movement can be modified, and the multi-condition and multi-angle characteristics of gas hydrate can be researched.

[0008] The purpose of the present application is achieved by a movable gas hydrate nuclear magnetic resonance device, comprising a shell and a nuclear magnetic resonance device body, a lifting support structure is arranged in the shell, a moving frame is connected to the lifting support structure, and the nuclear magnetic resonance device body is fixedly connected to the moving frame; a wire slot is arranged on the inner side of the shell, and the wire slot is used for penetrating the cable connected to the nuclear magnetic resonance device body; the lifting support structure comprises a plurality of push rod shafts, each push rod shaft is connected with a driving structure capable of driving each push rod shaft to rotate around the central axis thereof, the moving frame is sleeved on each push rod shaft, and the moving frame can be lifted and moved along the central axis of the push rod shaft under the driving of the rotation of each push rod shaft to drive the nuclear magnetic resonance device body to be lifted and moved along the central axis of the push rod shaft.

[0009] In a preferred embodiment of the present application, the shell comprises a top plate, a bottom plate, a front panel, a rear panel and side plates, a detection opening is arranged on the front panel, a top end gap is arranged on the top plate, the opening end of the top end gap corresponds to the detection opening, the top end gap is used for the moving frame to pass through and for the to-be-detected member to pass through, and a bottom end gap is arranged on the bottom plate to be used for the to-be-detected member to pass through; a rubber protective sleeve is arranged on the outer side of the lifting support structure in the shell, and the rubber protective sleeve is arranged in an open manner at a position opposite to the detection opening.

[0010] In a preferred embodiment of the present application, the moving frame comprises a connecting middle plate, a containing gap is arranged on the connecting middle plate at a position opposite to the detection opening, a side blocking coaming is arranged at the containing gap, the nuclear magnetic resonance device body is arranged on the inner side of the side blocking coaming, and the nuclear magnetic resonance device body is fixedly connected to the connecting middle plate; an inner threaded hole is arranged on the connecting middle plate at a position corresponding to each push rod shaft, an outer threaded part is arranged on the outer wall of each push rod shaft, the push rod shaft and the connecting middle plate form a lead screw nut transmission mechanism, and the rotation of the push rod shaft is converted into the movement of the connecting middle plate to drive the nuclear magnetic resonance device body to be lifted and moved along the central axis of the push rod shaft.

[0011] In a preferred embodiment of the present application, a plurality of connecting grooves are arranged on the connecting middle plate, a plurality of fixers are connected to the bottom end of the nuclear magnetic resonance device body, and each fixer can be fixedly connected in each connecting groove; the moving frame, the fixer and the wire slot are made of plastic.

[0012] In a preferred embodiment of the present application, the driving structure comprises a driving motor and a plurality of speed reducers, transmission shafts, and lifting seats, each of the lifting seats is arranged on the bottom plate, each of the push rod shafts is arranged through the connecting middle plate and the two ends of each of the push rod shafts are respectively hinged to the lifting seat and the top plate, and the driving motor drives each of the push rod shafts to rotate around the central axis thereof through each of the speed reducers, each of the transmission shafts, and each of the lifting seats.

[0013] In a preferred embodiment of the present application, the lifting seat is arranged with a first gear and a second gear that are engaged with each other, the first gear is sleeved on the push rod shaft and extends into the transmission shaft in the lifting seat, the second gear is sleeved on the transmission shaft, and the torque of the driving motor is transmitted to each of the push rod shafts through each of the speed reducers, each of the transmission shafts, each of the second gears, and each of the first gears.

[0014] In a preferred embodiment of the present application, the number of the speed reducers is three, which are set as a first speed reducer, a second speed reducer, and a third speed reducer, the second speed reducer is located on one side of the lifting support structure, the third speed reducer is located on the other side of the lifting support structure, and the first speed reducer is arranged between the second speed reducer and the third speed reducer.

[0015] The driving motor is connected to the first speed reducer through a transmission shaft, the two sides of the first speed reducer are respectively connected to the second speed reducer and the third speed reducer through a transmission shaft, and the two sides of the second speed reducer are respectively connected to a lifting seat through a transmission shaft.

[0016] In a preferred embodiment of the present application, a limiting device is arranged above the bottom plate, the limiting device is used for limiting the movement of the moving frame, and a foundation bolt is connected to the bottom plate for supporting.

[0017] In a preferred embodiment of the present application, an ear ring is connected to the top plate for hoisting.

[0018] The shell is made of aluminum alloy material to isolate external electromagnetic interference.

[0019] The purpose of the present application can also be achieved by a detection method, which is implemented by using the movable gas hydrate nuclear magnetic resonance device, and comprises the following steps:

[0020] Step a, before testing, assemble the hydrate experiment structure, which comprises a glass fiber reinforced plastic connecting pipe, a measuring antenna, a circulating temperature control system, an upper reactor, a lower reactor, a water injection pump and a gas cylinder, the circulating temperature control system comprises a circulating refrigerator and a coil pipe, and circulating cooling liquid circulates in the circulating refrigerator and the coil pipe; the upper reactor and the lower reactor are connected to two ends of the glass fiber reinforced plastic connecting pipe respectively, the coil pipe is wound on the glass fiber reinforced plastic connecting pipe, and two ends of the coil pipe are connected with water inlets and outlets of the circulating refrigerator respectively; the measuring antenna is buckled on the glass fiber reinforced plastic connecting pipe;

[0021] Step b, hoist the movable gas hydrate nuclear magnetic resonance device to a detection position, the glass fiber reinforced plastic connecting pipe passes through a detection area of the nuclear magnetic resonance equipment body, and the magnet of the nuclear magnetic resonance equipment body is connected with the measuring antenna;

[0022] Step c, inject water into the upper reactor through the water injection pump, and inject gas into the lower reactor through the gas cylinder to a target pressure to perform a hydrate experiment;

[0023] Step d, when performing nuclear magnetic resonance testing, the driving structure is controlled to control the lifting movement of the moving frame, so as to drive the lifting movement of the nuclear magnetic resonance equipment body, and the moving speed and the moving distance of each movement can be modified, and multi-condition and multi-mode measurement can be completed.

[0024] According to the above, the movable gas hydrate nuclear magnetic resonance device and the detection method thereof have the following beneficial effects.

[0025] In the present application, the driving structure, the lifting support structure and the moving frame are used to realize the stable movement of the nuclear magnetic resonance equipment body, and the real-time state in the pipeline is monitored through the movement of the nuclear magnetic resonance equipment body, which is more in line with the actual situation.

[0026] The driving structure is controlled to realize the accurate movement of the nuclear magnetic resonance equipment body, the moving speed and the moving distance of each movement can be modified, and multi-condition and multi-mode measurement can be completed.

[0027] The shell is provided with a wire slot, and the test cable connected with the nuclear magnetic resonance equipment body and the external test system moves with the nuclear magnetic resonance equipment body, and the wire slot can realize the arrangement of the cable connected with the nuclear magnetic resonance equipment body and prevent the cable from being broken.

[0028] It is very practical to build a nuclear magnetic resonance moving device applied to gas hydrate test in a hydrate generation and decomposition experiment carried out under laboratory conditions. The nuclear magnetic resonance moving device can greatly simulate the application of a nuclear magnetic resonance imaging device in actual production, and provide relevant theoretical and technical support for commercial exploitation of hydrates and ocean carbon dioxide storage in the form of hydrates. BRIEF DESCRIPTION OF DRAWINGS

[0029] The following drawings are merely intended to illustrate and explain the present application, and do not limit the scope of the present application.

[0030] wherein:

[0031] Figure 1 It is a schematic diagram of the overall structure of the movable gas hydrate nuclear magnetic resonance device of the present application.

[0032] Figure 2 It is a structure diagram of the inside of the shell of the movable gas hydrate nuclear magnetic resonance device of the present application.

[0033] Figure 3 It is a schematic diagram of the moving frame of the present application.

[0034] Figure 4 It is a schematic diagram of the wire slot and the stopper of the present application.

[0035] Figure 5 It is a schematic diagram of the fixer of the present application.

[0036] Figure 6 It is a working state schematic diagram of the movable gas hydrate nuclear magnetic resonance device of the present application.

[0037] Figure 7 It is a schematic diagram of the hydrate experiment structure.

[0038] In the drawings:

[0039] 100, movable gas hydrate nuclear magnetic resonance device;

[0040] 1, shell; 10, wire slot; 11, top plate; 12, bottom plate; 13, front panel; 14, rear panel; 15, side plate; 16, stopper; 17, anchor bolt; 18, support guide rod;

[0041] 2, nuclear magnetic resonance equipment body;

[0042] 3, lifting support structure; 31, push rod shaft;

[0043] 4, moving frame; 41, connecting middle plate; 411, internal thread hole; 412, via hole; 42, side blocking plate;

[0044] 5, drive structure; 51, first speed reducer; 52, second speed reducer; 53, third speed reducer; 54, transmission shaft; 55, elevator seat;

[0045] 6, rubber protective sleeve;

[0046] 7, fixer;

[0047] 8, earring;

[0048] 200, hydrate experiment structure; 201, glass fiber reinforced plastic connecting pipe; 202, measurement antenna; 203, upper reactor; 204, lower reactor; 205, water injection pump; 206, gas cylinder; 207, circulating refrigerator; 208, coil pipe. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the accompanying drawings.

[0050] The specific embodiments of the present application described herein are for the purpose of explanation and illustration only and are not intended to limit the present application in any manner. Those skilled in the art can conceive any possible modification based on the present application under the teaching of the present application, which should be considered as falling within the scope of the present application. It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "mount", "connect", "connect" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, it can be a connection between two elements, it can be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not indicate the only embodiment.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0052] As Figures 1 to 6As shown, the present application provides a movable gas hydrate nuclear magnetic resonance device 100, which comprises a shell 1 and a nuclear magnetic resonance device body 2, a lifting support structure 3 is arranged in the shell 1, a moving frame 4 is connected to the lifting support structure 3, and the nuclear magnetic resonance device body 2 is fixedly connected in the moving frame 4; a wire slot 10 is arranged on the inner side of the shell 1, and the wire slot 10 is used for penetrating the cable connected to the nuclear magnetic resonance device body 2; in a specific embodiment, the wire slot 10 is a rolling wire slot structure; the lifting support structure 3 comprises a plurality of push rod shafts 31, each push rod shaft 31 is connected with a driving structure 5 capable of driving each push rod shaft 31 to rotate around the central axis thereof, the moving frame 4 is sleeved on each push rod shaft 31, and the moving frame 4 can be driven to move up and down along the central axis of the push rod shaft 31 to drive the nuclear magnetic resonance device body 2 to move up and down along the central axis of the push rod shaft 31.

[0053] The conventional nuclear magnetic resonance experimental device is fixed, and the deposition layer state at different positions is detected by changing the position of the reaction kettle; however, in actual industrial application, the position of the pipeline cannot be changed. In the movable gas hydrate nuclear magnetic resonance device 100 provided by the present application, the stable movement of the nuclear magnetic resonance device body 2 is realized through the driving structure 5, the lifting support structure 3 and the moving frame 4, and the real-time state in the pipeline is monitored through the movement of the nuclear magnetic resonance device body 2, which is more suitable for actual conditions.

[0054] The accurate movement of the nuclear magnetic resonance device body 2 is realized by controlling the driving structure 5, and the movement speed and the distance of each movement can be modified, so that multi-condition and multi-mode measurement can be realized.

[0055] The wire slot 10 is arranged in the shell, and the test cable connected to the nuclear magnetic resonance device body 2 moves up and down with the nuclear magnetic resonance device body 2 and the moving frame 4; the wire slot 10 can realize the arrangement of the cable connected to the nuclear magnetic resonance device body 2, so as to prevent the cable from being broken.

[0056] The use of the present application can greatly simulate the application of the nuclear magnetic resonance imaging device in actual production, and provide related theoretical and technical support for the commercial exploitation of hydrates and the ocean storage of carbon dioxide in the form of hydrates.

[0057] Further, as shown in Figure 1 , Figure 2 The shell comprises a top plate 11, a bottom plate 12, a front panel 13, a rear panel 14 and side plates 15, the front panel 13 is provided with a detection opening, the top plate 11 is provided with a top end gap, the opening end of the top end gap corresponds to the detection opening, the top end gap is used for the lifting and passing of the moving frame 4 and the penetrating of the detected member (pipeline), and the bottom plate 12 is provided with a bottom end gap for the penetrating of the detected member; a rubber protective sleeve 6 is arranged on the outer side of the lifting support structure 3 in the shell 1, and the rubber protective sleeve 6 is arranged in an open position relative to the detection opening.

[0058] The rubber protective sleeve is filled in the space surrounded by the moving frame, the shell and the chassis.

[0059] Further, the shell 1 is made of aluminum alloy material, which can effectively isolate external electromagnetic interference and does not contain magnetism.

[0060] The rubber protective sleeve 6 is made of synthetic rubber material with good wear resistance and high elasticity, tensile strength and elongation.

[0061] Further, as shown in Figure 2 , Figure 3 The moving frame 4 includes a connecting middle plate 41, which is provided with a receiving notch at a position opposite to the detection opening, and a side blocking plate 42 is arranged at the receiving notch. The NMR device body 2 is arranged on the inner side of the side blocking plate 42, and the NMR device body 2 is fixedly connected with the connecting middle plate 41. The connecting middle plate 41 is provided with an inner threaded hole at a position corresponding to each push rod shaft 31, and an outer threaded part is arranged on the outer wall of each push rod shaft 31. The push rod shaft 31 and the connecting middle plate 41 form a screw nut transmission mechanism. The rotation of the push rod shaft 31 is converted into the movement of the connecting middle plate 41, so as to drive the NMR device body 2 to move up and down along the central axis of the push rod shaft 31.

[0062] In a specific embodiment, the connecting middle plate 41 is provided with an inner threaded hole 411 at each corner, and four push rod shafts 31 are respectively arranged through each inner threaded hole 411. A connecting through hole can also be arranged at each corner of the connecting middle plate 41, and a connecting nut with an inner threaded hole is arranged in the connecting through hole.

[0063] Further, a plurality of support guide rods 18 are arranged between the top plate 11 and the bottom plate 12, and the support guide rods 18 pass through the connecting middle plate 41 in a clearance fit. The connecting middle plate 41 is provided with a through hole 412 at a corresponding position, and the support guide rod 18 passes through the through hole 412. The support guide rod 18 supports the top plate 11 and guides the connecting middle plate 41.

[0064] Further, a plurality of connecting grooves are arranged on the connecting middle plate 41, and a plurality of fixers 7 are connected to the bottom end of the NMR device body 2. Each fixer 7 can be fixedly connected in each connecting groove. The NMR device body 2 is fixed on the moving frame 4 through the fixer 7, so as to prevent sliding during movement.

[0065] As shown in Figure 5 , the fixer 7 is of an embedded structure, and the embedded part has a diameter of 1 cm. The upper part is provided with a flange-shaped hole, and the hole has a diameter of 2 cm. The fixer is completely matched with the moving frame 4 as a whole, and can well play a fixing role.

[0066] The mobile frame 4 and the fixer 7 are made of high-strength plastic. The mobile frame 4, the fixer 7 and the wire slot 10 are close to the body 2 of the nuclear magnetic resonance device, and are made of plastic to avoid affecting the detection of the body 2 of the nuclear magnetic resonance device.

[0067] Further, as shown in Figure 2 , the drive structure 5 includes a drive motor and a plurality of speed reducers, a transmission shaft 54 and a lifting seat 55. Each lifting seat 55 is arranged on the bottom plate 12, each push rod shaft 31 passes through the connecting middle plate 41, and the two ends of each push rod shaft 31 are respectively hinged to the lifting seat 55 and the top plate 11. The drive motor drives each push rod shaft 31 to rotate around its central axis through each speed reducer, each transmission shaft 54 and each lifting seat 55.

[0068] The first gear and the second gear are arranged in the lifting seat 55. The first gear is sleeved on the push rod shaft 31, and the second gear is sleeved on the transmission shaft 54 extending into the lifting seat 55. The torque of the drive motor is transmitted to each push rod shaft 31 through each speed reducer, each transmission shaft 54, each second gear and each first gear.

[0069] Each transmission shaft 54 is arranged parallel to the ground, and each push rod shaft 31 is arranged perpendicular to the ground.

[0070] In the embodiment, the number of speed reducers is three, which are set as a first speed reducer 51, a second speed reducer 52 and a third speed reducer 53. The second speed reducer 52 is located on one side of the lifting support structure 3, the third speed reducer 53 is located on the other side of the lifting support structure 3, and the first speed reducer 51 is arranged between the second speed reducer 52 and the third speed reducer 53.

[0071] The drive motor is connected to the first speed reducer 51 through a transmission shaft 54. The two sides of the first speed reducer 51 are respectively connected to the second speed reducer 52 and the third speed reducer 53 through a transmission shaft 54. The two sides of the second speed reducer 52 are respectively connected to a lifting seat 55 through a transmission shaft 54.

[0072] One push rod shaft 31 is connected to the mobile frame 4 on each four-corner lifting seat 55 to form a whole. The whole can be moved by controlling the central speed reducer (the first speed reducer 51).

[0073] Further, as shown in Figure 4 , a limiting device 16 is arranged above the bottom plate 12, and the limiting device 16 is used for limiting the mobile frame 4. The limiting device 16 is made of titanium alloy with higher hardness. Specifically, the limiting device 16 is distributed around the top of the bottom plate 12 to prevent the mobile frame 4 from exceeding the maximum stroke and causing the nuclear magnetic resonance device body 2 to be damaged.

[0074] As shown in Figure 1 , Figure 4As shown, the bottom of the base plate 12 is connected with an anchor bolt 17 for supporting the entire device for easy fixation. In a specific embodiment, an anchor bolt 17 is respectively provided at the four corners of the base plate 12 to complete the fixation of the device.

[0075] Furthermore, an inspection door that can be opened and closed is provided on the rear panel 14. The inspection door makes it easy to open the housing 1 and inspect the interior thereof.

[0076] Furthermore, the side panels 15 are detachable aluminum alloy panels, which facilitates maintenance of the internal space and wiring of the cable ducts.

[0077] Further, if Figure 1 As shown, the top of the top plate 11 is connected with an earring 8 for hoisting, which is convenient for transportation and movement. In a specific embodiment, an earring 8 is respectively set at the four corners of the top plate 11.

[0078] A threaded interface is provided on the top plate 11 , and the threaded interface is connected to the earring 8 via a fixer 7 .

[0079] Furthermore, the earrings 8 and the anchor bolts 17 can be made of 316 stainless steel. Since they are far away from the main body 2 of the nuclear magnetic resonance device, they will not affect it.

[0080] Example 1

[0081] Through the drive control of the lifting support structure 3 of the present invention, the MRI device body 2 connected to the mobile frame 4 can be lifted a maximum distance of 1.8 meters and bear a maximum load of 1.6 tons. This allows for rapid, high-precision vertical displacement control of the MRI probe (existing technology) with a displacement accuracy of 0.1 mm and controllable displacement speed. The device also features an overload self-protection mechanism and can operate normally in indoor humidity conditions of 30% to 80%.

[0082] The present invention further provides a detection method, which is implemented using the aforementioned mobile gas hydrate nuclear magnetic resonance device 100 and includes the following steps:

[0083] Step a: Before testing, assemble the hydrate experimental structure 200, as shown in FIG. Figure 7As shown, the hydrate experiment structure 200 includes a glass fiber reinforced plastic connecting pipe 201 (to-be-detected member), a measuring antenna 202, a circulating temperature control system, an upper reactor 203, a lower reactor 204, a water injection pump 205, and a gas cylinder 206. The circulating temperature control system includes a circulating refrigerator 207 and a coil pipe 208, and a cooling liquid is circulated in the circulating refrigerator 207 and the coil pipe 208. The upper reactor 203 and the lower reactor 204 are respectively connected to two ends of the glass fiber reinforced plastic connecting pipe 201. The coil pipe 208 is wound on the glass fiber reinforced plastic connecting pipe 201, and two ends of the coil pipe 208 are respectively connected to a water inlet and a water outlet of the circulating refrigerator 207. The measuring antenna 202 is buckled on the glass fiber reinforced plastic connecting pipe 201.

[0084] Specifically, the method comprises the following steps:

[0085] The upper reactor 203 and the lower reactor 204 are connected to the glass fiber reinforced plastic connecting pipe 201 through flanges, and a metal octagonal gasket is used for sealing the connection. The coil pipe 208 is uniformly wound on the glass fiber reinforced plastic connecting pipe 201, and then two ends of the coil pipe 208 are respectively connected to a water inlet and a water outlet of the circulating refrigerator 207. The measuring antenna 202 is buckled on the glass fiber reinforced plastic connecting pipe 201.

[0086] The length of the glass fiber reinforced plastic connecting pipe 201 is 1500 mm, the diameter is 65 mm, and the pressure resistance is 40 Mpa.

[0087] The length of the measuring antenna 202 is 300 mm, and the inner diameter is 70 mm.

[0088] The temperature control range of the circulating refrigerator 207 is 0-20℃, and the temperature control precision is ±0.1℃. In a specific embodiment, the reaction temperature is controlled to be 5℃.

[0089] The cooling liquid circulated in the circulating refrigerator 207 is a 3M electronic fluorinated liquid without hydrogen and magnetism.

[0090] The coil pipe 208 is an elastic rubber pipe with an inner diameter of 2 mm and without hydrogen and magnetism.

[0091] The upper reactor 203 and the lower reactor 204 are both made of 316L stainless steel with a pressure resistance of 40 Mpa.

[0092] The measuring antenna 202 is detachable, which facilitates installation with the glass fiber reinforced plastic connecting pipe 201.

[0093] In step b, the movable gas hydrate nuclear magnetic resonance device 100 is hoisted to a detection position, the glass fiber reinforced plastic connecting pipe 201 passes through a detection area of the nuclear magnetic resonance equipment body 2, and a magnet (prior art) of the nuclear magnetic resonance equipment body 2 is connected to the measuring antenna 202.

[0094] Specifically, comprising:

[0095] First, the rope is passed through the four ear rings 8, and it is lifted to the detection position by a crane, and the anchor bolt 17 is fixed to the ground. Figure 6 As shown, the glass fiber reinforced plastic connecting pipe 201 is in the middle space of the movable gas hydrate nuclear magnetic resonance device 100, that is, the top gap, the bottom gap, and the detection area of the nuclear magnetic resonance equipment body 2.

[0096] The magnet (prior art) of the nuclear magnetic resonance equipment body 2 is connected with the measuring antenna 202, and the glass fiber reinforced plastic connecting pipe 201 can be detected.

[0097] Step c, water is injected into the upper reactor 203 by the water injection pump 205, and gas is injected into the lower reactor 204 by the gas cylinder 206 to the target pressure, and the hydrate experiment is carried out; in a specific embodiment, the target pressure is 8Mpa.

[0098] Step d, when the nuclear magnetic resonance test is carried out, the driving structure 5 is controlled to control the lifting movement of the moving frame 4, and the nuclear magnetic resonance equipment body 2 is lifted and moved, and the moving speed and the moving distance each time can be modified, and multiple condition and multiple mode measurement is completed. The glass fiber reinforced plastic connecting pipe 201 between the upper reactor 203 and the lower reactor 204 is moved and detected, and the research on the radial generation rule of the hydrate is realized.

[0099] In the experiment, the driving structure 5 is controlled by operating the computer program (pre-recorded corresponding software), and then the movement of the moving frame 4 and the test of the nuclear magnetic resonance equipment body 2 are controlled. The characteristics of the gas hydrate under multiple conditions and multiple angles are researched.

[0100] As described above, the movable gas hydrate nuclear magnetic resonance device and the detection method thereof have the following beneficial effects:

[0101] In the present application, the driving structure, the lifting support structure and the moving frame are used to realize the stable movement of the nuclear magnetic resonance equipment body, and the real-time state in the pipeline is monitored by the movement of the nuclear magnetic resonance equipment body, which is more in line with the actual situation.

[0102] The nuclear magnetic resonance equipment body is accurately moved by controlling the driving structure, and the moving speed and the moving distance each time can be modified to meet the multiple condition and multiple mode measurement.

[0103] The shell of the present application is provided with a wire slot. Since the nuclear magnetic resonance equipment body moves up and down with the moving frame, the test cable connected with the outside test system will also move. The wire slot can realize the arrangement of the cable connected to the nuclear magnetic resonance equipment body, and prevent the cable from being broken.

[0104] The mobile nuclear magnetic resonance device applied to gas hydrate testing is very practical in hydrate generation and decomposition experiments carried out in a laboratory.

[0105] The above merely illustrates the specific embodiments of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present application shall fall within the scope of the present application.

Claims

1. A mobile gas hydrate nuclear magnetic resonance apparatus, characterized by, The application relates to a movable gas hydrate nuclear magnetic resonance device, which comprises a shell and a nuclear magnetic resonance device body, a lifting support structure is arranged in the shell, a moving frame is connected to the lifting support structure, and the nuclear magnetic resonance device body is fixedly connected to the moving frame; a wire slot is arranged on the inner side of the shell, and the wire slot is used for penetrating a cable connected to the nuclear magnetic resonance device body; the lifting support structure comprises a plurality of push rod shafts, each push rod shaft is connected with a driving structure capable of driving each push rod shaft to rotate around the central axis of the push rod shaft, the moving frame is sleeved on each push rod shaft, and the moving frame can be driven to move up and down along the central axis of each push rod shaft under the rotation of each push rod shaft so as to drive the nuclear magnetic resonance device body to move up and down along the central axis of each push rod shaft. The shell comprises a top plate, a bottom plate, a front panel, a rear panel and side plates, a detection opening is arranged on the front panel, a top end gap is arranged on the top plate, the opening end of the top end gap corresponds to the detection opening, the top end gap is used for the moving frame to move up and down and for a to-be-detected piece to penetrate through, and a bottom end gap is arranged on the bottom plate and used for the to-be-detected piece to penetrate through; a rubber protective sleeve is arranged on the outer side of the lifting support structure in the shell, and the rubber protective sleeve is arranged in an open mode at a position opposite to the detection opening. The moving frame comprises a connecting middle plate, a containing gap is arranged on the connecting middle plate at a position opposite to the detection opening, a side blocking coaming is arranged at the containing gap, the nuclear magnetic resonance device body is arranged on the inner side of the side blocking coaming, and the nuclear magnetic resonance device body is fixedly connected to the connecting middle plate; internal thread holes are arranged on the connecting middle plate at positions corresponding to the push rod shafts, external thread parts are arranged on the outer walls of the push rod shafts, the push rod shafts and the connecting middle plate form a screw nut transmission mechanism, and the rotation of the push rod shafts is converted into the movement of the connecting middle plate, so as to drive the nuclear magnetic resonance device body to move up and down along the central axis of the push rod shaft.

2. The movable gas hydrate nuclear magnetic resonance device according to claim 1, wherein A plurality of connecting grooves are arranged on the connecting middle plate, a plurality of fixers are connected to the bottom end of the nuclear magnetic resonance device body, and each fixer is fixedly connected in each connecting groove; the moving frame, the fixers and the wire slot are made of plastic.

3. The mobile gas hydrate nuclear magnetic resonance apparatus of claim 1, wherein, The driving structure comprises a driving motor and a plurality of speed reducers, transmission shafts and lifting seats, each lifting seat is arranged on the bottom plate, each push rod shaft penetrates through the connecting middle plate, and the two ends of each push rod shaft are respectively hinged to the lifting seat and the top plate, and the driving motor drives each push rod shaft to rotate around the central axis of the push rod shaft through each speed reducer, each transmission shaft and each lifting seat.

4. The movable gas hydrate nuclear magnetic resonance device according to claim 3, wherein The first gear and the second gear are arranged in the elevator seat and are engaged with each other, the first gear is sleeved on the push rod shaft, the second gear is sleeved on the transmission shaft which extends into the elevator seat, and the torque of the driving motor is transmitted to each push rod shaft through each speed reducer, each transmission shaft, each second gear and each first gear. 5.The movable gas hydrate nuclear magnetic resonance device of claim 3, wherein, The number of the speed reducers is three, which are set as a first speed reducer, a second speed reducer and a third speed reducer, the second speed reducer is located on one side of the lifting support structure, the third speed reducer is located on the other side of the lifting support structure, and the first speed reducer is arranged between the second speed reducer and the third speed reducer. The driving motor is connected with the first speed reducer through a transmission shaft, the two sides of the first speed reducer are connected with the second speed reducer and the third speed reducer through a transmission shaft respectively, and the two sides of the second speed reducer are connected with the elevator seat through a transmission shaft respectively. 6.The movable gas hydrate nuclear magnetic resonance device of claim 1, wherein, A limiter is arranged above the bottom plate, the limiter is used for limiting the movement of the moving frame, and a foundation bolt is connected below the bottom plate and is used for supporting. 7.The movable gas hydrate nuclear magnetic resonance device of claim 1, wherein, An ear ring is connected above the top plate and is used for hoisting, and the shell is made of aluminum alloy material to isolate external electromagnetic interference.

8. A method of detection using the mobile gas hydrate nuclear magnetic resonance apparatus according to any one of claims 1 to 7, characterized by, The method comprises the following steps: Step a, before testing, assemble a hydrate experiment structure, the hydrate experiment structure comprises a glass fiber reinforced plastic connecting pipe, a measurement antenna, a circulating temperature control system, an upper reactor, a lower reactor, a water injection pump and a gas cylinder, the circulating temperature control system comprises a circulating refrigerator and a coil pipe, the circulating refrigerator and the coil pipe circulate cooling liquid, the upper reactor and the lower reactor are connected to two ends of the glass fiber reinforced plastic connecting pipe respectively, the coil pipe is wound on the glass fiber reinforced plastic connecting pipe, and two ends of the coil pipe are connected with a water inlet and a water outlet of the circulating refrigerator respectively, and the measurement antenna is buckled on the glass fiber reinforced plastic connecting pipe; Step b, hoist the movable gas hydrate nuclear magnetic resonance device to a detection position, the glass fiber reinforced plastic connecting pipe passes through a detection area of the nuclear magnetic resonance device body, and a magnet of the nuclear magnetic resonance device body is connected with the measurement antenna; Step c, inject water into the upper reactor through the water injection pump, and inject gas into the lower reactor through the gas cylinder to a target pressure to perform a hydrate experiment; Step d, when performing nuclear magnetic resonance testing, control the driving structure to control the moving frame to move up and down, drive the nuclear magnetic resonance device body to move up and down, the moving speed and the moving distance of each movement can be modified, and multiple conditions and multiple modes of measurement can be completed.

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