CN115673946A - Natural gas hydrate core grinding device, system and method - Google Patents

Abstract

The invention provides a natural gas hydrate core abrasive disc device, a natural gas hydrate core abrasive disc system and a natural gas hydrate core abrasive disc method, wherein the abrasive disc device comprises: a box body; the cold control platform is arranged in the box body, and a refrigeration channel for liquid refrigeration medium to circulate is arranged in the cold control platform; the core clamp is arranged on the cooling control table and can exchange heat with the cooling control table so as to refrigerate the core sample clamped by the core clamp; the grinding disc assembly is located above the core clamp and comprises a first motor and a grinding disc connected to the output end of the first motor, and the grinding disc can grind and clamp the upper surface of a core sample of the core clamp. Based on the technical scheme of the invention, the temperature of the grinding disc area can be acquired and controlled in real time, the deformation of the core caused by overhigh temperature is avoided, meanwhile, the decomposition of natural gas hydrate of the core caused by overhigh temperature in the grinding process is avoided, the grinding is carried out fully automatically, and manual intervention is not needed, so that the grinding efficiency and the grinding quality are improved.

Description

Natural gas hydrate core grinding device, system and method

Technical Field

The invention relates to the technical field of grinding devices, in particular to a natural gas hydrate core grinding device, system and method.

Background

The natural gas hydrate is an ice-like crystalline substance which is distributed in deep sea sediments or permafrost in land areas and is formed by natural gas and water under the conditions of low temperature and high pressure. The natural gas hydrate is an unconventional energy resource with huge reserves and cleanness, and is also one of strategic resources in China. Hydrate sample analysis is simply to observe and analyze the phase composition and microstructure of a hydrate core sample using various testing means. The test means comprises a reflection microscope, a polarization microscope, a confocal laser Raman spectrum, a scanning electron microscope, X-ray diffraction (XRD), an infrared absorption spectrum and the like. The testing means all require that the surface of the sample has enough flatness and cleanliness, and before the analysis of the natural gas hydrate core, a grinder is needed to grind the hydrate core into flat slices.

The natural gas hydrate rock core can be stably stored only in a low-temperature environment, the natural gas hydrate sample in the rock core can be decomposed in the lapping process due to the fact that a workbench does not have the temperature control capacity in the conventional rock sample lapping machine at present, and the structure of the conventional rock sample lapping machine is not suitable for the residual hydrate rock core, so that the rock core slice cannot be lapped. The manual grinding has many defects, such as low speed and efficiency, difficulty in ensuring the flatness and thickness uniformity of a sample slice, and poor quality of a grinding sheet; in addition, the artificial abrasive disc needs to be operated in a liquid nitrogen bath, and the ultralow temperature operation environment at about-190 ℃ has great potential safety hazard.

Disclosure of Invention

In order to solve the problem that a core grinding machine in the prior art cannot meet the requirement of a hydrate core grinding, the application provides a natural gas hydrate core grinding device, a natural gas hydrate core grinding system and a natural gas hydrate core grinding method.

In a first aspect, the present invention provides a natural gas hydrate core abrasive disc device, including:

a box body;

the cooling control platform is arranged in the box body, and a refrigeration channel for circulating a liquid refrigeration medium is arranged in the cooling control platform;

the core clamp is arranged on the cooling control table and can exchange heat with the cooling control table so as to refrigerate a core sample clamped by the core clamp;

the grinding disc assembly is located above the core clamp and comprises a first motor and a grinding disc connected to the output end of the first motor, and the grinding disc can grind and clamp the upper surface of a core sample of the core clamp.

In one embodiment, further comprising:

and the clamp driving assembly is arranged below the cooling control table and comprises a second motor and a rotating shaft connected to the output end of the second motor, and the rotating shaft penetrates through the cooling control table and is connected with the bottom of the core clamp. Through this embodiment, anchor clamps drive assembly can drive the rotation of rock core anchor clamps, improves the relative rotational speed of rock core anchor clamps and mill in proper order to this improves abrasive disc efficiency.

In one embodiment, the abrasive disc assembly further comprises:

one end of the stepping telescopic shaft is connected with the output end of the first motor through a coupler, the other end of the stepping telescopic shaft is detachably connected with the grinding disc, and the coupler can realize axial movement of the stepping telescopic shaft relative to the first motor;

and the stepping mechanism is matched with the stepping telescopic shaft and can control the axial extension of the stepping telescopic shaft so as to adjust the feeding amount of the grinding disc.

In one embodiment, the core clamp further comprises a gaseous refrigeration medium nozzle, wherein the gaseous refrigeration medium nozzle is arranged on one side of the core clamp and faces the core clamp, and is connected with a gaseous refrigeration medium source through a pipeline. Through this embodiment, can improve refrigeration effect through gaseous state refrigeration medium nozzle to rock core anchor clamps blowout gaseous state refrigeration medium, combine liquid refrigeration medium.

In one embodiment, the two ends of the refrigeration channel are respectively provided with a medium inlet and a medium outlet, and the medium inlet and the medium outlet are respectively connected with a liquid refrigeration medium storage tank and a medium pump through pipelines.

In one embodiment, the medium pump has a medium vaporizing device inside, and the medium pump can be used as a gaseous refrigerant source for outputting a gaseous refrigerant to the core holder. Through this embodiment, adopt to install medium gasification equipment additional in the medium pump, make the medium pump as the input power of liquid medium and gaseous medium simultaneously, be convenient for carry out the simultaneous control to the flow of two kinds of media, reduced the setting of power component simultaneously, reduce device cost.

In one embodiment, a temperature sensor is arranged inside the cooling control platform, and the temperature sensor is a thermistor.

In one embodiment, an electric heating wire is further arranged inside the cooling control platform. Through the embodiment, the electric heating wire is used for adjusting the final refrigeration temperature in cooperation with refrigeration of the refrigeration medium, and simultaneously controlling the temperature stability of the temperature control area.

In a second aspect, the invention provides a natural gas hydrate core abrasive disc system, which comprises the abrasive disc device; and

a blade control assembly including a controller configured to input control commands to control operating parameters of a grinding component in the blade apparatus;

and the refrigeration control assembly comprises a temperature controller, the temperature controller is electrically connected with the temperature sensor in the grinding plate device, and the temperature controller can adjust the temperature of the core sample in the grinding plate device by controlling a refrigeration component in the grinding plate device.

In a third aspect, the invention provides a natural gas hydrate core lapping method, which is applied to the lapping system and comprises the following steps:

s1: clamping a rock core sample to be ground by a rock core clamp;

s2: setting abrasive disc parameters through a controller of the abrasive disc control assembly, starting refrigeration on the core sample through a temperature controller of the refrigeration control assembly, and then starting the abrasive disc;

s3: the temperature controller controls the flow of a refrigerating medium and the heating of the heating part according to the temperature change condition in the grinding process so as to keep the refrigerating temperature of the core sample in an optimal temperature interval;

s4: and finishing grinding, and unloading the ground core sample from the core clamp.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Compared with the prior art, the natural gas hydrate core abrasive disc device, the natural gas hydrate core abrasive disc system and the natural gas hydrate core abrasive disc method at least have the following beneficial effects:

according to the device, the system and the method for grinding the natural gas hydrate core, the temperature of the grinding area can be obtained and controlled in real time, so that the corresponding optimal temperature in the grinding process of the natural gas hydrate core is matched, the core is prevented from being deformed due to overhigh temperature, and the flatness of the grinding is ensured; meanwhile, the natural gas hydrate of the core is prevented from being decomposed due to overhigh temperature in the grinding process. In addition, the grinding process and operation of the grinding plate device are performed automatically without manual intervention, the grinding plate is efficient, and the accurate control of the thickness, the thickness uniformity and the surface flatness of the grinding plate can be realized.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the drawings. Wherein:

fig. 1 shows a schematic structural view of a blade arrangement according to the invention.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Reference numerals are as follows:

10-box body, 20-cooling control table, 201-temperature signal line, 21-medium inlet, 211-liquid cooling medium storage tank, 22-medium outlet, 221-medium pump, 30-core clamp, 40-grinding disc assembly, 41-first motor, 42-stepping telescopic shaft, 43-grinding disc, 50-clamp driving assembly, 51-rotating shaft, 52-second motor, 60-gaseous cooling medium nozzle, 70-controller and 80-temperature controller.

Detailed Description

The invention will be further explained with reference to the drawings.

Example 1

As shown in fig. 1 of the accompanying drawings, an embodiment of the present invention provides a natural gas hydrate core abrasive disc device, including:

a case 10;

a cooling control platform 20 arranged in the box body 10 and internally provided with a refrigeration channel for liquid refrigeration medium to circulate;

the core clamp 30 is arranged on the cooling control table 20 and can exchange heat with the cooling control table 20 to refrigerate a core sample clamped by the core clamp;

and the grinding disc assembly 40 is positioned above the core clamp 30 and comprises a first motor 41 and a grinding disc 43 connected to the output end of the first motor 41, and the grinding disc 43 can grind the upper surface of the core sample clamped on the core clamp 30.

Specifically, the grinding chip device of the present embodiment mainly functionally includes a jig portion, a temperature control portion, and a grinding chip portion.

Wherein, the clamp part mainly comprises a core clamp 30 which is used for clamping a core sample to be lapped. Further, the core clamp 30 comprises a plurality of radially arranged adjusting screws, the adjusting screws are matched with the clamp body in a threaded mode, and the adjusting screws can move radially through rotating the adjusting screws so as to adjust the size of the clamping area of the core clamp 30 and match core samples in different sizes and shapes.

The temperature control part mainly comprises a cooling control table 20, wherein the core clamp 30 is placed on the cooling control table 20 and is refrigerated through the cooling control table 20, so that in the grinding process, the temperature of the core sample on the core clamp 30 is kept in a proper temperature range, the core sample is prevented from being decomposed due to overhigh temperature, the thickness unevenness of the core sample caused by thermal deformation is reduced, and the grinding and polishing quality is further improved. In addition, accuse cold platform 20 still has the temperature regulation function, and accuse cold platform 20 is inside to be provided with temperature sensor and electric heating wire (not shown in the attached drawing), and temperature sensor is connected with external temperature signal line 201, acquires and transmits the temperature data of accuse cold platform 20 in real time, then strengthens the refrigeration effect when the temperature is higher than suitable temperature, then improves the temperature through electric heating wire when the temperature is in the suitable temperature at the bottom to make the temperature match the target temperature interval.

It should be noted that the cooling means of the cooling console 20 may be adaptively set according to the specific situation, for example, semiconductor cooling or conventional cooling medium cooling may be adopted. In this embodiment, in consideration of the refrigeration efficiency and the refrigeration capacity, a conventional refrigeration medium is used for refrigeration, and a refrigeration channel through which a liquid refrigeration medium flows is provided inside the cooling console 20, and the refrigeration channel can also be matched with a gaseous refrigeration medium in principle, but the refrigeration effect of the gaseous refrigeration medium is poorer than that of the liquid medium. The two ends of the refrigeration channel are respectively provided with a medium inlet 21 and a medium outlet 22, the medium inlet 21 and the medium outlet 22 are respectively connected with the liquid refrigeration medium storage tank 211 and the medium pump 221 through pipelines, the medium pump 221 sucks the liquid medium out of the liquid refrigeration medium storage tank 211 by forming local negative pressure, and the liquid medium flows through the refrigeration channel in the refrigeration console 20 in the process of being output to the medium pump 221 from the liquid refrigeration medium storage tank 211 so as to realize the refrigeration function of the refrigeration console 20. Due to frictional heat generation in the grinding process, the temperature of the core sample can be changed, and then the corresponding refrigeration temperature can be realized by adjusting the refrigeration effect of the cooling control table 20, namely the flow of the liquid refrigeration medium passing through the refrigeration channel can be adjusted by controlling the output power of the medium pump 221.

Further, the temperature control part may further include a gaseous cooling medium nozzle 60, the gaseous cooling medium nozzle 60 is connected to a gaseous cooling medium source through a pipeline, and the gaseous cooling medium nozzle 60 may eject a gaseous cooling medium to the core holder 30, so as to further improve a cooling effect on the basis of the liquid cooling medium. Based on the medium pump 221, the medium pump 221 may be modified into a gaseous refrigerant source, that is, a medium vaporizing device (not shown in the drawings) is installed inside the medium pump 221, and after the liquid medium enters the medium pump 221, the liquid medium is vaporized into a gaseous medium by the medium vaporizing device and is ejected from the gaseous refrigerant nozzle 60 for refrigeration. The output power of the medium pump 221 is controlled to control the flow rates of the liquid medium and the gaseous medium at the same time, so that the refrigeration temperature can be accurately controlled.

The grinding disc part mainly comprises a grinding disc assembly 40, a grinding disc 43 in the grinding disc assembly 40 is connected with the output end of a first motor 41 and is positioned right above the core clamp 30, and the first motor 41 provides power for the rotation of the grinding disc 43. When the core sample is ground, the grinding surface of the grinding disc 43 contacts the upper surface of the core sample, and the first motor 41 drives the grinding disc 43 to rotate so as to grind the core sample. The grinding disc 43 is detachably connected with the first motor 41, so that different grinding discs 43 can be replaced according to different grinding disc requirements.

The grinding disc 43 needs to increase the feeding amount of the grinding disc 43 to match the decreasing thickness of the core sample as the grinding process is performed, so that the grinding disc 43 needs to have a moving function in a direction close to or far from the core clamp 30. The moving function of the grinding disc 43 can be that the first motor 41 is fixed, and the grinding disc 43 moves; it is also possible that the first motor 41 moves integrally with the grinding disc 43. In this embodiment, the first motor 41 is used for fixing, and the grinding disc 43 moves, so that the grinding disc assembly 40 further comprises:

one end of the stepping telescopic shaft 42 is connected with the output end of the first motor 41 through a coupler, the other end of the stepping telescopic shaft is detachably connected with the grinding disc 43, and the coupler can realize that the stepping telescopic shaft 42 axially moves relative to the first motor 41;

the stepping mechanism, in cooperation with the stepping telescopic shaft 42, can control the axial extension of the stepping telescopic shaft 42 to adjust the feed amount of the grinding disc 43.

Specifically, the step telescopic shaft 42 is fixedly connected with the grinding disc 43, and the movement of the grinding disc 43 relative to the first motor 41 is converted into the movement of the step telescopic shaft 42 relative to the motor. Since the variation range of the feed amount of the grinding disc 43 (i.e., the reduced thickness of the ground core sample) is small and within a certain range, the step telescopic shaft 42 may be connected to the output end of the first motor 41 through a coupling, and the coupling is a structure capable of realizing the relative movement between the step telescopic shaft 42 and the output end of the first motor 41, such as a spline coupling. A stepping mechanism (not shown in the drawings) is used for controlling the feeding of the stepping telescopic shaft 42, and is fixedly connected with the stepping telescopic shaft 42 in the axial direction and movably matched with the stepping telescopic shaft 42 in the circumferential direction, for example, by a bearing. Stepping mechanism itself has controllable removal function to the feeding of control drive step by step telescopic shaft 42, and stepping mechanism's concrete structure can be selected for use as the circumstances, can adopt the higher mode of integrated level such as cylinder, also can be other structures that have controllable flexible removal function.

In this embodiment, the suitable temperature of the abrasive disc of the natural gas hydrate is about-190 ℃, and further the refrigeration medium is nitrogen, that is, the liquid medium is liquid nitrogen, and the gaseous medium is nitrogen. The lapping device of the embodiment can also be applied to lapping of other samples needing temperature control, such as low-temperature samples like ice samples and pore ice-containing rock samples, and accordingly other refrigeration media can be adopted to match the required target temperature.

This embodiment is owing to adopted the liquid nitrogen as refrigeration medium, in order to prevent that the liquid nitrogen from revealing and causing personnel's injury, all sets up grinding plate device's each functional component in box 10 to carry out certain degree of sealed to box 10, in order to prevent that liquid nitrogen from revealing to grinding plate device outside. Further, the wall of the box 10 is partially transparent to facilitate observation of the grinding process inside the box 10.

The abrasive disc device in this embodiment can acquire and control the regional temperature of abrasive disc in real time to this matches the corresponding temperature of natural gas hydrate, avoids natural gas hydrate to decompose because of the high temperature in the abrasive disc process. In addition, the grinding process and operation of the grinding plate device are performed automatically without manual intervention, the grinding plate is efficient, and the accurate control of the thickness, the thickness uniformity and the surface flatness of the grinding plate can be realized.

Example 2

As shown in fig. 1 of the accompanying drawings, an embodiment of the present invention provides a natural gas hydrate core abrasive disc device, including:

a case 10;

a cooling control platform 20 arranged in the box body 10 and internally provided with a refrigeration channel for liquid refrigeration medium to circulate;

the core clamp 30 is arranged on the cooling control table 20 and can exchange heat with the cooling control table 20 to refrigerate a core sample clamped by the core clamp;

the grinding disc assembly 40 is positioned above the core clamp 30 and comprises a first motor 41 and a grinding disc 43 connected to the output end of the first motor 41, and the grinding disc 43 can grind the upper surface of the core sample clamped on the core clamp 30;

and the clamp driving assembly 50 is arranged below the cooling control table 20 and comprises a second motor 52 and a rotating shaft 51 connected to the output end of the second motor 52, and the rotating shaft 51 penetrates through the cooling control table 20 and is connected with the bottom of the core clamp 30.

Specifically, the grinding plate device in the embodiment further includes a clamp driving assembly 50, a rotating shaft 51 in the clamp driving assembly 50 is fixedly connected to an output end of a second motor 52, and a distal end of the rotating shaft 51 is fixedly connected to the bottom of the core clamp 30. The clamp driving assembly 50 can drive the core clamp 30 to rotate so as to improve the grinding efficiency, namely, the second motor 52 and the first motor 41 rotate in opposite directions, so that the grinding disc 43 and the core clamp 30 respectively have opposite rotating motions, and the relative rotation degree of the grinding disc 43 and the core clamp 30 is increased, thereby improving the grinding efficiency. The rotation speed of the second motor 52 driving the core clamp 30 is less than that of the grinding disc 43, so that the core clamp 30 is prevented from being unstable in structure due to the fact that the rotation speed is too high, and therefore a speed reducer needs to be further arranged at the output end of the second motor 52.

The connection structure of the rotating shaft 51 of the clamp driving assembly 50 and the core clamp 30 may be that the rotating shaft 51 penetrates through the cooling control table 20 and is connected with the center of the bottom of the core clamp 30, or may be that a connection shaft part extending through the cooling control table 20 extends from the center of the bottom of the core clamp 30 as shown in fig. 1, and the rotating shaft 51 and the connection shaft part are relatively fixed. Regardless of the type of the method, the center of the cooling control platform 20 is provided with a through hole for the corresponding component to pass through.

Example 3

The embodiment of the invention provides a natural gas hydrate core abrasive disc system, which comprises the abrasive disc device; and

a blade control assembly including a controller 70, the controller 70 being capable of inputting control commands to control operational parameters of a grinding member in the blade arrangement;

and the refrigeration control assembly comprises a temperature controller 80, the temperature controller 80 is electrically connected with a temperature sensor in the grinding plate device, and the temperature of the core sample in the grinding plate device can be adjusted by controlling a refrigeration component in the grinding plate device.

Specifically, the blade control assembly employs a controller 70 based on a PLC automatic control system, and the controller 70 is installed in a control box together with the first motor 41. The control system in the controller 70 is connected with the first motor 41 of the grinding disc assembly 40, the stepping telescopic shaft 42 and the second motor 52 of the clamp driving assembly 50, controls the operation of each motor and the output power through instructions input by a control panel thereof, and accurately controls the motor rotation speed, the feeding of the grinding disc 43, the grinding thickness and the like in the grinding process so as to ensure that the ground core sheets have uniform thickness, good flatness and good consistency.

The data input end of the temperature controller 80 is connected with the temperature sensor in the cooling console 20 through a temperature signal line 201 to obtain temperature data in real time, and the signal output end of the temperature controller 80 is connected with the heating device corresponding to the electric heating wire and the medium pump 221 through signal lines respectively to control the operation of corresponding components to enable the temperature of the core clamp 30 and the core sample to be matched with the target temperature. For natural gas hydrate, the target temperature is about-190 ℃, and the temperature regulation and control precision of the temperature controller 80 is required to meet +/-0.1 ℃.

Furthermore, the temperature controller comprises an internal microcontroller and an external operation panel, and plays a role in regulating and controlling the temperature of the cooling console, and the microcontroller comprises an acquisition module, a medium pump power control system and a temperature rise control system. The working principle of the circuit is as follows: the electric signal generated by the temperature sensor is sent to an acquisition module of the microcontroller to obtain a temperature sampling value, the microcontroller performs PID calculation, the Pulse Width Modulation (PWM) of the microcontroller is controlled according to the calculation result, the PWM is output to the power regulating circuit, and the output power corresponding to the medium pump and the electric heating wire is regulated to achieve the purpose of power regulation. Wherein, the output of refrigeration and heating are respectively controlled by independent PID.

Example 4

The embodiment of the invention provides a natural gas hydrate core abrasive disc grinding method, which is applied to the abrasive disc grinding system and comprises the following steps:

s1: the core sample to be ground is clamped by a core clamp 30;

s2: setting abrasive disc parameters through a controller 70 of the abrasive disc control assembly, starting refrigeration on the core sample through a temperature control instrument 80 of the refrigeration control assembly, and then starting the abrasive disc;

s3: the temperature controller 80 controls the flow of the refrigerating medium and the heating of the heating part according to the temperature change condition in the grinding process so as to keep the refrigerating temperature of the core sample in an optimal temperature interval;

s4: grinding is complete and the ground core sample is unloaded from the core holder 30.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, which refer to an orientation or positional relationship shown in the drawings, are used for convenience of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (10)

1. A natural gas hydrate rock core abrasive disc device which is characterized by comprising:

a box body;

the cold control platform is arranged in the box body, and a refrigeration channel for liquid refrigeration medium to circulate is arranged in the cold control platform;

the core clamp is arranged on the cooling control table and can exchange heat with the cooling control table so as to refrigerate a core sample clamped by the core clamp;

the grinding disc assembly is located above the core clamp and comprises a first motor and a grinding disc connected to the output end of the first motor, and the grinding disc can grind and clamp the upper surface of a core sample of the core clamp.

2. The natural gas hydrate core grinding plate device as claimed in claim 1, further comprising:

and the clamp driving assembly is arranged below the cooling control table and comprises a second motor and a rotating shaft connected to the output end of the second motor, and the rotating shaft penetrates through the cooling control table and is connected with the bottom of the core clamp.

3. The natural gas hydrate core grinding plate device as claimed in claim 1, wherein the grinding disc assembly further comprises:

one end of the stepping telescopic shaft is connected with the output end of the first motor through a coupler, the other end of the stepping telescopic shaft is detachably connected with the grinding disc, and the coupler can realize axial movement of the stepping telescopic shaft relative to the first motor;

the stepping mechanism is matched with the stepping telescopic shaft and can control the axial extension amount of the stepping telescopic shaft so as to adjust the feeding amount of the grinding disc.

4. The natural gas hydrate core grinding device according to claim 1, further comprising a gaseous refrigeration medium nozzle, wherein the gaseous refrigeration medium nozzle is arranged on one side of the core holder and faces the core holder, and is connected with a gaseous refrigeration medium source through a pipeline.

5. The natural gas hydrate core grinding plate device as claimed in claim 1 or 4, wherein a medium inlet and a medium outlet are respectively formed at two ends of the refrigeration channel, and the medium inlet and the medium outlet are respectively connected with a liquid refrigeration medium storage tank and a medium pump through pipelines.

6. The natural gas hydrate core grinding plate device as claimed in claim 5, wherein a medium gasification device is arranged inside the medium pump, and the medium pump can be used as a gaseous cooling medium source for outputting a gaseous cooling medium to the core clamp.

7. A natural gas hydrate core grinding plate device according to any one of claims 1 to 4, wherein a temperature sensor is arranged inside the cooling control platform, and the temperature sensor is a thermistor.

8. A natural gas hydrate core grinding plate device according to any one of claims 1 to 4, wherein an electric heating wire is further arranged inside the cooling control table.

9. A natural gas hydrate core lapping system, comprising the lapping device of any one of claims 1 to 8; and

a blade control assembly including a controller configured to input control commands to control operating parameters of grinding components in the blade arrangement;

and the refrigeration control assembly comprises a temperature controller, the temperature controller is electrically connected with the temperature sensor in the grinding plate device, and the temperature controller can adjust the temperature of the core sample in the grinding plate device by controlling a refrigeration component in the grinding plate device.

10. A natural gas hydrate core lapping method is applied to the lapping system of claim 9 and comprises the following steps:

s1: clamping a core sample to be ground by a core clamp;

s2: setting abrasive disc parameters through a controller of the abrasive disc control assembly, starting refrigeration on the core sample through a temperature controller of the refrigeration control assembly, and then starting the abrasive disc;

s3: the temperature controller controls the flow of a refrigerating medium and the heating of the heating part according to the temperature change condition in the grinding process so as to keep the refrigerating temperature of the core sample in an optimal temperature interval;

s4: and finishing grinding, and unloading the ground core sample from the core clamp.

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