CN110376016B - Sampling device and sampling method - Google Patents
Sampling device and sampling method Download PDFInfo
- Publication number
- CN110376016B CN110376016B CN201910764765.5A CN201910764765A CN110376016B CN 110376016 B CN110376016 B CN 110376016B CN 201910764765 A CN201910764765 A CN 201910764765A CN 110376016 B CN110376016 B CN 110376016B
- Authority
- CN
- China
- Prior art keywords
- sampling
- container
- rod
- combustible ice
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a sampling device and a sampling method, which relate to the technical field of combustible ice, wherein the sampling device comprises a sampling container, a sampling rod assembly and a pressure regulating assembly; the pressure regulating component is connected with the sampling container; one side of the sampling container is provided with a first connecting part which is detachably connected with the core tank, and the first connecting part is provided with a communication hole which can be opened and closed; the sampling rod assembly is located on one side, opposite to the first connecting portion, of the sampling container, the first end of the sampling rod assembly is located in the sampling container and used for grabbing samples, the second end of the sampling rod assembly is located outside the sampling container, the sampling rod assembly can move relative to the sampling container along the axis direction of the sampling rod assembly, so that the first end of the sampling rod assembly extends into the core tank through the communication hole and samples.
Description
Technical Field
The embodiment of the invention relates to the technical field of combustible ice, in particular to a sampling device and a sampling method.
Background
The natural gas hydrate is also called as combustible ice, is a clean energy source which can be exploited and is distributed in the permafrost on the sea bottom or the land. In order to conveniently and safely exploit the combustible ice, workers usually dig the combustible ice from the seabed or frozen soil to be exploited for researching the environmental conditions such as temperature, pressure and the like; the excavated combustible ice is typically stored in core barrels.
In order to safely exploit the combustible ice, in-situ percolation experiments and the like are generally performed to map voids and void shapes in the combustible ice and the attachment morphology of the combustible ice on the combustible ice. And because combustible ice need be stored in the low temperature environment of high pressure, in order to prevent the decomposition of combustible ice in the rock core jar, the staff adopts the mode of more simple and convenient manual generation combustible ice usually. The generating means may comprise: the device comprises a generating container and a natural gas storage tank, wherein the generating device is placed in an experimental environment at the temperature of 2-4 ℃, gravel is placed in the generating container, the natural gas storage tank is communicated with the generating container, and water is injected into the generating container to simulate the high-pressure condition for generating combustible ice so as to promote the generation of the combustible ice.
However, the adhesion form of the combustible ice generated by the generating device on the gravel is different from the form of the combustible ice dug in the sea bottom or frozen soil, and the mining guidance significance of the combustible ice is poor according to the experimental conclusion obtained by the combustible ice generated artificially.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a sampling device and a sampling method, which are used for grabbing a combustible ice sample from a core tank, are convenient to operate, and improve the guiding significance of a combustible ice experiment.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a first aspect of embodiments of the present invention provides a sampling device, comprising: the sampling device comprises a sampling container, a sampling rod assembly and a pressure regulating assembly; the pressure regulating assembly is connected with the sampling container and is used for regulating the pressure in the sampling container; one side of the sampling container is provided with a first connecting part which is detachably connected with the core tank, and the first connecting part is provided with a communication hole which can be opened and closed; the sampling rod assembly is located on one side, opposite to the first connecting portion, of the sampling container, the first end of the sampling rod assembly is located in the sampling container, the first end of the sampling rod assembly is used for grabbing a combustible ice sample, the second end of the sampling rod assembly is located outside the sampling container, the sampling rod assembly can move along the axis direction of the sampling rod assembly, and therefore the first end of the sampling rod assembly extends into the core tank through the communicating hole and samples.
The sampling device as described above, wherein the sampling rod assembly comprises: a sampling rod; the first end of sample pole has the sample chamber that is used for holding combustible ice sample, the sample chamber is followed the axis direction of sample pole extends, just the sample chamber has towards the opening of intercommunicating pore.
The sampling device as described above, wherein the side wall of the sampling cavity is provided with a locking section, and the radial dimension of the cross section of the locking section is gradually increased from one end close to the opening to one end far away from the opening; the locking section is internally provided with an elastic clamping ring which can move along the axial direction of the sampling rod relative to the sampling cavity, and the inner edge of the elastic clamping ring is used for clamping and fixing a combustible ice sample; when the elastic clamping ring is located at one end, close to the opening, of the locking cavity, the outer edge of the elastic clamping ring is abutted to the cavity wall of the locking section, so that the combustible ice sample is fixed in the locking section.
The sampling device as described above, wherein the sampling rod further has a limiting portion protruding from an outer wall surface of the sampling rod, and the limiting portion can contact with an inner wall surface of the sampling container; and the length from the limiting part to the first end of the sampling rod is less than the extension length of the sampling container along the axial direction of the sampling rod.
The sampling device as above, wherein the second end of the sampling rod has a second connecting portion for connecting with a driving member, and the driving member is used for driving the sampling rod to rotate around its axis.
The sampling device as described above, wherein the sampling rod assembly further comprises: a push rod; the sampling rod is provided with a connecting hole, the connecting hole extends along the axial direction of the sampling rod and penetrates through the bottom wall surface of the sampling cavity, and the push rod is arranged in the connecting hole in a penetrating manner; the push rod can slide relative to the sampling rod, so that one end of the push rod, which is close to the sampling cavity, can extend into the sampling cavity or retract into the connecting hole.
The sampling device as described above, wherein one end of the push rod close to the sampling cavity is provided with an abutting portion protruding from the outer surface of the push rod, and the top surface of the abutting portion is used for abutting the combustible ice sample.
The sampling device as described above, wherein the first connection portion includes: the connecting piece is detachably connected with the core tank, and the sampling valve is arranged in the sampling container; the sampling valve includes: the valve comprises a valve seat and a valve body which is rotatably connected in the valve seat; the valve seat is provided with a containing cavity for containing the valve body, and the containing cavity is communicated with the sampling container; the communication hole is located on the valve body.
The sampling device as described above, wherein the pressure regulating assembly comprises: a storage tank; the storage tank is communicated with the sampling container through a communication pipeline and is used for storing pressure-regulating liquid; and the communicating pipeline is provided with a delivery pump for pumping the pressure-regulating liquid and a pressure gauge for reading the pressure in the sampling container.
Compared with the prior art, the sampling device provided by the embodiment of the invention has the following advantages: the sampling device provided by the embodiment of the invention comprises a sampling container, wherein the sampling container is connected with a core tank through a first connecting part, the first connecting part is provided with a communicating hole which can be opened and closed, the sampling container is in a sealed state when the communicating hole is closed, and the sampling container is communicated with the core tank when the first connecting part is connected with the core tank and the communicating hole is in an opened state; a sampling rod assembly is arranged on one side of the sampling container, which is far away from the first connecting part, the first end of the sampling rod assembly is positioned in the sampling container, and the second end of the sampling rod assembly is positioned outside the sampling container; when the first connecting part is connected with the core tank and the communication hole is in an open state, the sampling rod assembly moves relative to the sampling container to enable the first end of the sampling rod assembly to extend into the core tank to grab the combustible ice sample, after grabbing is completed, the sampling rod assembly can move towards one side back to the core tank to enable the first end of the sampling rod assembly to be retracted into the sampling container, and the communication hole is closed; in the sampling process, the pressure in the sampling container can be within a preset range, so that the combustible ice in the core tank and the grabbed combustible ice sample are all kept in a stable state, and the combustible ice dug from the seabed or frozen soil is adopted in the in-situ seepage experiment, so that the experiment precision is high, and the guiding significance is great.
A second aspect of an embodiment of the present invention provides a sampling method, including: adjusting the pressure in the sampling container through a pressure adjusting assembly to enable the difference value between the pressure in the sampling container and the pressure in the rock core tank to be smaller than a preset threshold value; communicating the sampling container with the core tank, and extending a first end of a sampling rod assembly into the core tank; grabbing a combustible ice sample through the sampling rod assembly; and withdrawing the first end of the sampling rod assembly into the sampling container, and disconnecting the sampling container from the core tank.
The sampling method provided by the embodiment of the invention is applied to the sampling device, so that the combustible ice in the core tank and the grabbed combustible ice sample are kept in a stable state in the sampling process.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the sampling device and the sampling method provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of a sampling device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sampling device according to a first embodiment of the present invention;
FIG. 3 is a schematic structural view of the locking section;
FIG. 4 is a schematic structural view of the connection of the sampling device and the core barrel;
FIG. 5 is a schematic diagram of a configuration in which a sampling rod assembly grabs a combustible ice sample from a core barrel;
FIG. 6 is a schematic structural diagram of a sampling device feeding a combustible ice sample into an experimental device;
fig. 7 is a flowchart illustrating a sampling method according to a second embodiment of the present invention.
Reference numerals:
10: a sampling container; 11: a first connection portion; 111: a connecting member; 112: a sampling valve; 1121: a valve seat; 1122: a valve body; 12: a communicating hole;
20: a sampling rod assembly; 21: a sampling rod; 211: a sampling cavity; 212: an opening; 213: a locking section; 214: an elastic snap ring; 215: a limiting part; 216: a second connecting portion; 217: connecting holes; 22: a push rod; 221: a butting part;
30: a voltage regulating component; 31: a storage tank; 32: a delivery pump; 33: a pressure gauge;
40: a core tank; 41: a combustible ice body; 42: a combustible ice sample; 43: an experimental device.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The natural gas hydrate is also called combustible ice, is a clean energy source which can be exploited, is distributed in the permafrost on the sea bottom or land area, and is a solid substance generated by water and natural gas under the conditions of high pressure and low temperature. Because the combustible ice can be maintained in a stable state under the conditions of high pressure and low temperature, the combustible ice obtained from the seabed or frozen soil needs to be placed in the core tank to prevent the combustible ice from being decomposed. Moreover, because the volume of the combustible ice obtained from the sea bottom or the frozen soil is large, and the volume of the combustible ice required by experimental analysis such as in-situ seepage experiments is small, workers usually adopt a simpler and more convenient mode of artificially generating the combustible ice to perform experiments, however, the attachment form of the artificially generated combustible ice is different from the form of the combustible ice in the sea bottom or the frozen soil.
In order to avoid the guiding significance of the experiment influenced by the artificially generated combustible ice, the invention provides the sampling device. Fig. 1 is a schematic structural diagram of a sampling device according to a first embodiment of the present invention, and referring to fig. 1, a sampling device according to a first embodiment of the present invention includes: a sampling container 10, a sampling rod assembly 20 and a pressure regulating assembly 30; the pressure regulating assembly 30 is connected with the sampling container 10 and is used for regulating the pressure in the sampling container 10; one side of the sampling container 10 is provided with a first connecting part 11 which is used for being detachably connected with the core tank 40, and the first connecting part 11 is provided with a communication hole 12 which can be opened and closed; the sampling rod assembly 20 is located on the opposite side of the sampling container 10 from the first connection portion 11, the first end of the sampling rod assembly 20 is located in the sampling container 10, the first end of the sampling rod assembly 20 is used for grabbing the combustible ice sample 42, the second end of the sampling rod assembly 20 is located outside the sampling container 10, and the sampling rod assembly 20 can move relative to the sampling container 10 along the self axis direction, so that the first end of the sampling rod assembly 20 extends into the core tank 40 through the communication hole 12 and samples.
In particular, the present embodiment provides a sampling device for reliably grasping a combustible ice sample 42 from a combustible ice body 41 within a core barrel 40. The sampling device includes a sampling container 10, a sampling rod assembly 20, and a pressure regulating assembly 30.
The sampling container 10 is a box-type structure having an internal cavity, and the box-type structure may be a cube, a cylinder, or the like. And the sampling container 10 is used for grabbing the combustible ice sample 42, and the material thereof can be a high-pressure and low-temperature resistant metal material.
In order to grasp the combustible ice sample 42 from the core barrel 40, the sampling container 10 has a first connection portion 11 detachably connectable to the core barrel 40, and the first connection portion 11 has a communication hole 12 that can be opened and closed. The first connecting portion 11 may be a first buckle, a first thread, or other detachable connecting structures, and meanwhile, the core barrel 40 has a second buckle or a second thread that is matched with the first connecting portion 11; the first sealing assembly is arranged between the sampling container 10 and the core barrel 40, and may include a rubber sealing ring or other sealing members commonly used by those skilled in the art, as long as the leakage at the connection between the sampling container 10 and the core barrel 40 can be prevented, and is not limited herein.
The communication hole 12 is opened to communicate the sampling container 10 with the core tank 40, the communication hole 12 is closed to disconnect the sampling container 10 from the core tank 40, and the sampling container 10 is in a sealed state, wherein a sliding baffle plate can be arranged on one side of the first connecting part 11 close to the sampling container 10 or one side of the first connecting part close to the core tank 40, and the communication hole 12 is opened and closed through the sliding of the sliding baffle plate.
The first end of the thief rod assembly 20 extends through the sidewall of the sampling container 10 and into the sampling container 10, and the connection between the thief rod assembly 20 and the sampling container 10 has a second sealing assembly in order to maintain the internal cavity of the sampling container 10 in a sealed state. Since the sample rod assembly 20 needs to move relative to the sampling container 10 during sampling, the first sealing assembly may be a packing structure including an asbestos packing or other sealing elements for dynamic sealing known to those skilled in the art, as long as the leakage at the connection between the sample rod assembly 20 and the sampling container 10 is prevented.
A first end of the sample rod assembly 20 is positioned within the sampling container 10 and may extend through the communication aperture 12 into the core barrel 40 to capture a combustible ice sample 42. Wherein, the first end of sampling rod subassembly 20 can have two and dig the container, and two are dug the container and all have the pan feeding mouth, and two are dug the container closure and can form a confined material chamber, realize obtaining combustible ice sample 42 with the mode of digging.
When the staff needs to perform experimental analysis of the combustible ice, the sampling device, the core tank 40 and the experimental device 43 can be placed in a laboratory with room temperature of 2-4 ℃ to meet the temperature condition required for maintaining the stable state of the combustible ice. Then the sampling container 10 is connected to the core jar 40 through the first connection part 11; the pressure regulating assembly 30 is used for regulating the pressure in the sampling container 10 until the pressure difference between the sampling container and the pressure in the core tank 40 is smaller than a preset threshold value, so that the pressure in the sampling container 10 meets the storage condition of combustible ice; opening the communication hole 12 to communicate the sampling container 10 with the core tank 40; driving the sampling rod assembly 20 to move, so that the first end of the sampling rod assembly 20 extends into the core tank 40, and grabbing a combustible ice sample 42 from the combustible ice in the core tank 40 and withdrawing the combustible ice sample into the sampling container 10; the communication hole 12 is closed, and the connection between the sampling container 10 and the core tank 40 is disconnected, so that the sampling operation can be completed, and the operation is simple and convenient; and the staff uses the combustible ice sample 42 to carry out the experimental analysis of in-situ seepage and the like, the experimental precision is high, and the guiding significance for combustible ice mining is large.
To facilitate grasping of the combustible ice sample 42 by the worker, continuing to refer to FIG. 1, the sample rod assembly 20 includes: a sampling rod 21; the first end of the sampling rod 21 has a sampling cavity 211 for accommodating the combustible ice sample 42, the sampling cavity 211 extends in the axial direction of the sampling rod 21, and the sampling cavity 211 has an opening 212 facing the communication hole 12.
Specifically, the sampling rod 21 is rod-shaped, the first end of the sampling rod 21 is located in the sampling container 10, and a sampling cavity 211 is formed on the end surface of the first end of the sampling rod 21, and the sampling cavity 211 extends along the axial direction of the sampling rod 21. Wherein the extended length of the sampling cavity 211 and the radial dimension of the cross section of the sampling cavity 211 are determined by the size of the combustible ice required for experimental analysis.
Because the opening 212 of the sampling cavity 211 is located on the end surface of the first end of the sampling rod 21, when the sampling device provided by this embodiment is used to capture the combustible ice sample 42, a force can be applied to one side of the core tank 40 along the axial direction of the sampling rod 21 until the first end of the sampling rod 21 abuts against and is inserted into the combustible ice, and at this time, the combustible ice sample 42 enters the sampling cavity 211 through the opening 212.
In order to facilitate the insertion of the first end of the sampling rod 21 into the combustible ice, the sampling cavity 211 may have a lead-in section at the opening 212 for guiding the insertion of the first end of the sampling rod 21 into the combustible ice, wherein the wall thickness of the lead-in section is gradually smaller from the end away from the communication hole 12 to the end close to the communication hole 12.
After the first end of the sampling rod 21 is inserted into the combustible ice, the combustible ice sample 42 needs to be separated from the combustible ice and withdrawn into the sampling container 10, so that the sampling operation can be completed. Considering that the combustible ice is in a layered or dispersed form having a porous structure and has low hardness, in the present embodiment, the inner wall surface of the sampling chamber 211 may be provided as a non-cylindrical surface, such as a polygonal prism surface, an elliptic cylindrical surface, or the like, so that, when the sampling rod 21 is driven to rotate about its own axis, a circumferential driving force may be applied to the combustible ice sample 42 through the inner wall surface of the sampling chamber 211 and may be twisted off from the combustible ice.
Further, the first end of thief rod 21 drives combustible ice sample 42 and withdraws to sampling vessel 10 after, need to break off sampling vessel 10 and rock core jar 40, is connected to experimental apparatus 43 with sampling vessel 10 on to place combustible ice sample 42 in experimental apparatus 43, the staff can make combustible ice sample 42 drop by oneself through strikeing thief rod 21, or can draw combustible ice sample 42 from the chamber 211 of drawing a sample with the help of parts such as the spoon in experimental apparatus 43.
The sampling device that this embodiment provided, simple structure, the cost of manufacture is low, and the staff of being convenient for snatchs combustible ice sample 42 from the rock core jar 40.
Fig. 3 is a schematic structural diagram of a locking section, please refer to fig. 3, in order to facilitate the combustible ice sample 42 to be separated from the combustible ice body 41, in this embodiment, the side wall of the sampling cavity 211 is provided with a locking section 213, and a radial dimension of a cross section of the locking section 213 is gradually increased from an end close to the opening 212 to an end away from the opening 212; the locking section 213 is internally provided with an elastic snap ring 214 which can move along the axial direction of the sampling rod 21 relative to the sampling cavity 211, and the inner edge of the elastic snap ring 214 is used for clamping and fixing the combustible ice sample 42; when snap ring 214 is positioned at an end of the locking cavity proximate opening 212, an outer edge of snap ring 214 abuts the cavity wall of locking section 213 to secure combustible ice sample 42 within locking section 213.
Specifically, the locking section 213 is a groove-shaped section formed on the sidewall of the sampling cavity 211 and recessed toward the side away from the axis of the sampling rod 21, and the locking section 213 may be a tapered surface or an arc-shaped surface recessed toward the side away from the axis of the sampling rod 21.
The distribution angle of the locking section 213 around the axis direction of the sampling rod 21 can be less than or equal to 360 degrees, preferably, in this embodiment, the distribution angle of the locking section 213 around the axis direction of the sampling rod 21 is 360 degrees, that is, the locking section is annularly arranged, the elastic snap ring 214 is arranged in the locking section 213, and the elastic snap ring 214 can be an annular rubber ring, a C-shaped snap spring and the like.
The inside diameter of the snap ring 214 in the free state may be larger than the radial dimension of the cross section of the sampling cavity 211, and the outside diameter dimension of the snap ring 214 in the free state may be smaller than the large end dimension of the locking section 213, so that the snap ring 214 can move relative to the sampling rod 21 in the locking section 213; specifically, when the first end of sampling rod 21 was inserted and is located in the combustible ice, combustible ice sample 42 got into in the sample chamber 211, and at this moment, snap ring 214 moved to the main aspects of locking section 213 under combustible ice sample 42's the drive, and snap ring 214 can not form the hindrance that combustible ice sample 42 got into sample chamber 211.
When the elastic clamping ring 214 is located at the small end of the locking section 213, the inner diameter of the elastic clamping ring 214 can be smaller than the radial dimension of the cross section of the sampling cavity 211, specifically, when the combustible ice sample 42 needs to be separated from the combustible ice body 41, a worker can drive the sampling rod 21 to move to one side away from the core tank 40, at this time, the first end of the sampling rod 21 moves relative to the combustible ice sample 42, the combustible ice sample 42 drives the elastic clamping ring 214 to move to one side of the small end of the locking section 213 until the elastic clamping ring 214 is tightly pressed between the combustible ice sample 42 and the small end of the locking section 213, and the combustible ice sample 42 is tightly clamped with the first end of the sampling rod 21, so that the worker can pull the combustible ice sample 42 off from the combustible ice body 41 in the process of withdrawing the first end of the sampling rod 21 to the sampling container 10.
The outer wall surface of the elastic snap ring 214 can be matched with the locking section 213, that is, the outer edge size of the elastic snap ring 214 can be gradually increased from the end close to the opening 212 to the end away from the opening 212, and the small end of the elastic snap ring 214 is convenient for guiding the elastic snap ring 214 to be compressed between the combustible ice sample 42 and the small end of the locking section 213.
After the combustible ice sample 42 is separated from the combustible ice body 41, the worker needs to drive the sampling rod 21 to move towards one side away from the core tank 40, so that the first end of the sampling rod 21 is retracted into the sampling container 10, and in order to prevent the first end of the sampling rod 21 from being separated from the sampling container 10, the sampling rod 21 can be provided with scales to prompt the worker of the moving distance of the sampling rod 21 when the sampling rod 21 extends into the core tank 40 and the moving distance of the sampling rod 21 when the first end of the sampling rod 21 is retracted; also can set up position sensor on the thief rod 21, bee calling organ and controller etc, the controller links to each other with position sensor, a position signal for receiving position sensor, and the controller links to each other with bee calling organ, a sound production or not sound production according to position signal control bee calling organ, exemplarily, when position sensor is located sampling vessel 10, the controller can control bee calling organ not sound production, in order to not disturb the staff sample, when position sensor is located sampling vessel 10 outward, the controller can control the bee calling organ sound production, in order to indicate staff's thief rod 21 to remove and target in place, close bee calling organ until the staff.
Preferably, referring to fig. 1, the sampling rod 21 of the present embodiment further has a limiting portion 215 protruding from the outer wall surface of the sampling rod 21, and the limiting portion 215 can contact with the inner wall surface of the sampling container 10; and the length from the position-limiting part 215 to the first end of the sampling rod 21 is less than the extension length of the sampling container 10 along the axial direction of the sampling rod 21.
The outer surface of the limiting portion 215 protruding from the sampling rod 21 is in a shape of a boss, and may extend in an annular shape along the axial direction of the sampling rod 21, and further, the boss may be a closed annular boss or an intermittent annular boss formed by a plurality of sub-bosses arranged at intervals around the axis of the sampling rod 21.
The stopper 215 has a contact surface that can contact the inner wall surface of the sampling vessel 10, and when the contact surface contacts the inner wall surface of the sampling vessel 10, the worker cannot move the sampling rod 21 to the side away from the core barrel 40; and the spacing between the limiting part 215 and the first end of the sampling rod 21 is smaller than the extension length of the sampling container 10 along the axial direction of the sampling rod 21, so that when the limiting part 215 is abutted against the inner wall surface of the sampling container 10, the combustible ice sample 42 can be positioned in the sampling container 10; the sampling rod 21 is prompted to move in place through the limiting part 215, stability of the combustible ice sample 42 is maintained, and operation is convenient.
In order to save labor intensity of workers, the second end of the sampling rod 21 is provided with a second connecting part 216 for connecting with a driving part, and the driving part is used for driving the sampling rod 21 to rotate around the axis of the sampling rod. The drive member may be a drive motor, the output shaft of which is connected to the second end of the thief rod 21 via a reduction assembly. When the sampling device provided by the embodiment is used for grabbing the combustible ice sample 42, the driving piece drives the sampling rod 21 to rotate around the axis of the sampling rod, and meanwhile, the worker drives the sampling rod 21 to move towards one side of the core tank 40, so that the combustible ice sample 42 is obtained in a drilling mode, and the labor intensity of the worker is low.
Further, fig. 2 is a schematic structural diagram of a sampling device according to a first embodiment of the present invention, please refer to fig. 2, and as an alternative, the sampling rod assembly 20 further includes: a push rod 22; the sampling rod 21 is provided with a connecting hole 217, the connecting hole 217 extends along the axial direction of the sampling rod 21 and penetrates through the bottom wall surface of the sampling cavity 211, and the push rod 22 is arranged in the connecting hole 217 in a penetrating manner; the push rod 22 can slide relative to the sampling rod 21, so that one end of the push rod 22 close to the sampling cavity 211 can extend into the sampling cavity 211 or retract into the connecting hole 217.
Specifically, the push rod 22 is inserted into the sampling rod 21 through the connection hole 217, and is movable relative to the sampling rod 21 along the axial direction of the sampling rod 21.
The aperture of the connection hole 217 may be smaller than the sectional radial dimension of the sampling cavity 211. One end of the connection hole 217 may penetrate through the bottom wall surface of the sampling cavity 211, so that the push rod 22 may extend into the sampling cavity 211; the other end of the connecting hole 217 may penetrate the second end of the sampling rod 21, and at this time, the length of the push rod 22 may be greater than that of the sampling rod 21, so that the portion of the push rod 22 extending out of the sampling rod 21 may serve as an operating end to drive the push rod 22 to move; the other end of connecting hole 217 also can be regardless of the second end of wearing thief rod 21, it is exemplary, can set up compression spring between the diapire face of push rod 22 and connecting hole 217, the one end that push rod 22 deviates from core jar 40 is connected with the action bars that can stretch out in thief rod 21 surface, the action bars can with thief rod 21 joint, make compression spring be in compression state, the first end that push rod 22 is close to core jar 40 is located connecting hole 217, when action bars and thief rod 21 break off, compression spring bounces, push rod 22 removes to core jar 40 one side with the help of compression spring's elastic force, and release combustible ice sample 42 from sample chamber 211.
In the embodiment, the combustible ice sample 42 is pushed out from the sampling cavity 211 in a sliding mode of the push rod, so that the structure is compact and the operation is convenient.
Wherein, one end of the push rod 22 close to the sampling cavity 211 is provided with a top part 221 protruding from the outer surface of the push rod 22, and the top surface of the top part 221 is used for pushing the combustible ice sample 42. The cross-sectional area of the abutting part 221 is larger than that of the push rod 22, so that the contact area with the combustible ice sample 42 is increased, preferably, the cross-sectional shape of the abutting part 221 can be the same as that of the sampling cavity 211, a dead angle for retaining the combustible ice sample 42 is avoided being formed between the abutting part 221 and the sampling cavity 211, and the whole combustible ice sample 42 in the sampling cavity 211 can be pushed out conveniently.
With reference to fig. 2, the first connecting portion 11 includes: a connector 111 for detachable connection with the core barrel 40, and a sampling valve 112 disposed within the sampling container 10; the sampling valve 112 includes: a valve seat 1121 and a valve body 1122 rotatably coupled within the valve seat 1121; the valve seat 1121 has a receiving cavity for receiving the valve body 1122, the receiving cavity communicating with the sampling vessel 10; the communication hole 12 is located on the valve body 1122.
The connecting piece 111 can be a first flange plate, a second flange plate matched with the first flange plate is arranged on the core tank 40, and the connecting piece 111 further comprises a plurality of bolts used for connecting the first flange plate and the second flange plate, so that the connecting piece is easy to disassemble, low in cost and easy to obtain.
To communicate the sampling vessel 10 with the core barrel 40 or to seal the sampling vessel 10, a sampling valve 112 is provided in this embodiment, and the sampling valve 112 may be a ball valve or other latching valve known to those skilled in the art. The valve seat 1121 of the sampling valve 112 is connected to the sampling container 10, and is provided with an accommodating cavity for accommodating the valve body 1122, the accommodating cavity is communicated with the sampling container 10, the valve body 1122 is spherical and can rotate relative to the valve seat 1121, wherein the valve body 1122 is provided with a communication hole 12, the communication hole 12 penetrates through the valve body 1122, the aperture of the communication hole 12 can be larger than the outer diameter of the sampling rod 21, and the sampling rod 21 can be inserted into the communication hole 12 conveniently. During sampling, the valve body 1122 can be rotated to make the axis of the communication hole 12 parallel to the axis of the sampling rod 21, and the sampling rod 21 can penetrate through the communication hole 12 and extend into the core tank 40; after the sampling is completed, the valve body 1122 can be rotated to make the axis of the communication hole 12 perpendicular to the axis of the sampling rod 21, and the sampling container 10 and the core tank 40 are disconnected to seal the sampling container 10, so that the operation is convenient, and the sampling valve 112 is low in cost and easy to obtain.
Referring to fig. 1 and 2, optionally, the voltage regulating assembly 30 includes: a storage tank 31; the storage tank 31 is communicated with the sampling container 10 through a communication pipeline, and the storage tank 31 is used for storing pressure-regulating liquid; the communication line is provided with a delivery pump 32 for pumping a pressure-regulated liquid and a pressure gauge 33 for reading the pressure in the sampling vessel 10.
Specifically, in the present embodiment, a pressure-regulating liquid is injected into the sampling container 10, so that the sampling container 10 is maintained in a high-pressure state, and the pressure-regulating liquid may be water or seawater. The pressure regulating liquid is stored in the holding vessel 31 to in injecting the sampling vessel 10 through delivery pump 32, when injecting the pressure regulating liquid, the staff can read the liquid pressure in the sampling vessel 10 through manometer 33, when reaching preset pressure, can close delivery pump 32, convenient operation.
The second embodiment of the present invention provides a sampling method, which is applied to the sampling device in the first embodiment. Fig. 7 is a schematic flow chart of a sampling method according to a second embodiment of the present invention, and as shown in fig. 7, the sampling method of this embodiment may specifically include the following steps:
s101, adjusting the pressure in the sampling container 10 through the pressure adjusting assembly 30 to enable the difference value between the pressure in the sampling container 10 and the pressure in the core tank 40 to be smaller than a preset threshold value.
S102, the sampling container 10 is communicated with the core tank 40, and the first end of the sampling rod assembly 20 extends into the core tank 40.
And S103, grabbing the combustible ice sample 42 through the sampling rod assembly 20.
And S104, withdrawing the first end of the sampling rod assembly 20 into the sampling container 10, and disconnecting the sampling container 10 from the core barrel 40.
Specifically, the sampling device, the core tank 40, and the experimental device 43 may be placed in a laboratory at room temperature of 2 ℃ to 4 ℃ to satisfy the temperature conditions required to maintain the stable state of the combustible ice.
Fig. 4 is a schematic structural diagram of the connection between the sampling device and the core barrel, please refer to fig. 4, the worker can adjust the pressure in the sampling container 10 through the pressure adjusting assembly 30, so that the difference between the pressure in the sampling container 10 and the pressure in the core barrel 40 is smaller than a preset threshold, that is, the pressure condition required for maintaining the combustible ice stabilizing device is met, and then the sampling container 10 and the core barrel 40 are connected.
Fig. 5 is a schematic structural diagram of the sampling rod assembly grabbing the combustible ice sample from the core tank, please refer to fig. 5, the sampling valve 112 is opened, the sampling container 10 and the core tank 40 are in a communication state, and the worker can drive the sampling rod 21 to move, and make the first end of the sampling rod 21 extend into the core tank 40 to grab the combustible ice sample 42. After the combustible ice sample 42 is caught, the side facing away from the core barrel 40 is moved to the sampling rod 21, so that its first end is retracted into the sampling vessel 10, and then the sampling valve 112 is closed and the connection between the sampling vessel 10 and the core barrel 40 is disconnected.
Fig. 6 is a schematic structural diagram of the sampling device sending the combustible ice sample into the experimental device, please refer to fig. 6, and connect the sampling container 10 and the experimental device 43, so that the worker can send the combustible ice sample 42 into the experimental device 43 for experimental analysis.
Compared with the prior art that the combustible ice is generated manually by workers for experimental analysis, the embodiment of the invention performs the experiment in a manner of grabbing the combustible ice sample 42 in the core tank, the experimental precision is high, and the experimental conclusion has great guiding significance for combustible ice exploitation.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A sampling device, comprising: the sampling device comprises a sampling container, a sampling rod assembly and a pressure regulating assembly;
the pressure regulating assembly is connected with the sampling container and is used for regulating the pressure in the sampling container; the pressure regulating subassembly includes: a storage tank; the storage tank is communicated with the sampling container through a communication pipeline and is used for storing pressure-regulating liquid; the communicating pipeline is provided with a delivery pump for pumping the pressure-regulating liquid and a pressure gauge for reading the pressure in the sampling container;
one side of the sampling container is provided with a first connecting part which is detachably connected with the core tank, and the first connecting part is provided with a communication hole which can be opened and closed;
the sampling rod assembly is positioned on one side of the sampling container opposite to the first connecting part, the first end of the sampling rod assembly is positioned in the sampling container, the first end of the sampling rod assembly is used for grabbing a combustible ice sample, the second end of the sampling rod assembly is positioned outside the sampling container, and the sampling rod assembly can move relative to the sampling container along the axis direction of the sampling rod assembly, so that the first end of the sampling rod assembly extends into the core tank through the communicating hole and samples;
the sampling rod assembly comprises: a sampling rod; the first end of the sampling rod is provided with a sampling cavity for containing the combustible ice sample, the sampling cavity extends along the axial direction of the sampling rod, and the sampling cavity is provided with an opening facing the communication hole;
the side wall of the sampling cavity is provided with a locking section, and the radial dimension of the section of the locking section is gradually increased from one end close to the opening to one end away from the opening; the locking section is internally provided with an elastic clamping ring which can move along the axial direction of the sampling rod relative to the sampling cavity, and the inner edge of the elastic clamping ring is used for clamping and fixing the combustible ice sample; in a free state, the inner diameter of the elastic clamping ring is larger than the radial size of the section of the sampling cavity, and the outer diameter of the elastic clamping ring is smaller than the size of the large end of the locking section; when the elastic clamping ring is positioned at one end, close to the opening, of the locking section, the outer edge of the elastic clamping ring is abutted against the cavity wall of the locking section, so that the combustible ice sample is fixed in the locking section;
the sampling rod is also provided with a limiting part protruding out of the outer wall surface of the sampling rod, and the limiting part can be contacted with the inner wall surface of the sampling container; and the length from the limiting part to the first end of the sampling rod is less than the extension length of the sampling container along the axial direction of the sampling rod.
2. The sampling device of claim 1, wherein the second end of the sampling rod has a second coupling portion for coupling with a driving member for rotating the sampling rod about its axis.
3. The sampling device of claim 1, wherein the sampling rod assembly further comprises: a push rod;
the sampling rod is provided with a connecting hole, the connecting hole extends along the axial direction of the sampling rod and penetrates through the bottom wall surface of the sampling cavity, and the push rod is arranged in the connecting hole in a penetrating manner;
the push rod can slide relative to the sampling rod, so that one end of the push rod, which is close to the sampling cavity, can extend into the sampling cavity or retract into the connecting hole.
4. The sampling device according to claim 3, wherein one end of the push rod close to the sampling cavity is provided with an abutting part protruding out of the outer surface of the push rod, and the top surface of the abutting part is used for ejecting the combustible ice sample.
5. A sampling device according to any one of claims 1 to 4, wherein the first connection comprises: the connecting piece is detachably connected with the core tank, and the sampling valve is arranged in the sampling container;
the sampling valve includes: the valve comprises a valve seat and a valve body which is rotatably connected in the valve seat;
the valve seat is provided with a containing cavity for containing the valve body, and the containing cavity is communicated with the sampling container; the communication hole is located on the valve body.
6. A sampling method applied to the sampling device according to any one of claims 1 to 5, comprising:
adjusting the pressure in the sampling container through a pressure adjusting assembly to enable the difference value between the pressure in the sampling container and the pressure in the rock core tank to be smaller than a preset threshold value;
communicating the sampling container with the core tank, and extending a first end of a sampling rod assembly into the core tank;
grabbing a combustible ice sample through the sampling rod assembly;
and withdrawing the first end of the sampling rod assembly into the sampling container, and disconnecting the sampling container from the core tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764765.5A CN110376016B (en) | 2019-08-19 | 2019-08-19 | Sampling device and sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764765.5A CN110376016B (en) | 2019-08-19 | 2019-08-19 | Sampling device and sampling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110376016A CN110376016A (en) | 2019-10-25 |
| CN110376016B true CN110376016B (en) | 2020-09-22 |
Family
ID=68259836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764765.5A Active CN110376016B (en) | 2019-08-19 | 2019-08-19 | Sampling device and sampling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110376016B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781011B (en) * | 2020-08-04 | 2023-03-28 | 中国船舶科学研究中心 | Pressure-maintaining and fidelity-keeping sampling device for combustible ice storage test cabin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105814429A (en) * | 2013-12-09 | 2016-07-27 | 独立行政法人产业技术综合研究所 | Subsampling device and method |
| CN106546444A (en) * | 2016-09-23 | 2017-03-29 | 浙江大学 | It is a kind of can be with the secondary pressurize deposit sampler of self-balancing |
| CN209084217U (en) * | 2018-09-19 | 2019-07-09 | 陈清龙 | A kind of pipe connecting component |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2019760B1 (en) * | 2017-10-18 | 2019-04-25 | Fugro Tech Bv | Piston corer and method of acquiring a soil sample. |
| CN109114338B (en) * | 2018-10-08 | 2024-03-15 | 陈清龙 | Insertion buckle connecting piece of pipe fitting |
| CN109655305B (en) * | 2018-12-06 | 2023-11-24 | 广州海洋地质调查局 | Hydrate reaction kettle sampling device and sampling method |
| CN110068733B (en) * | 2019-05-21 | 2020-03-27 | 中国科学院地质与地球物理研究所 | Device and method for measuring resistivity of natural gas hydrate pressure-maintaining coring sample |
-
2019
- 2019-08-19 CN CN201910764765.5A patent/CN110376016B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105814429A (en) * | 2013-12-09 | 2016-07-27 | 独立行政法人产业技术综合研究所 | Subsampling device and method |
| CN106546444A (en) * | 2016-09-23 | 2017-03-29 | 浙江大学 | It is a kind of can be with the secondary pressurize deposit sampler of self-balancing |
| CN209084217U (en) * | 2018-09-19 | 2019-07-09 | 陈清龙 | A kind of pipe connecting component |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110376016A (en) | 2019-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108518191B (en) | Natural gas hydrate pressure maintaining coring device | |
| CN110376016B (en) | Sampling device and sampling method | |
| CN108756796B (en) | Pressure-maintaining coring method for offshore drilling | |
| CN113029700B (en) | Sediment fidelity sampling device based on underwater ROV contains overburden water | |
| CN111109213B (en) | Bidirectional sealing piston type deep-brillouin multicellular organism trapping and fidelity sampler | |
| CN104502158A (en) | Soil gas sampling system | |
| CN111044312A (en) | Full-sea-depth macrobiology pressure-maintaining sampling device and sampling and transferring method thereof | |
| CN112031688A (en) | Pressure-maintaining coring drilling tool for natural gas hydrate | |
| CN112985914B (en) | Contain overlay water deposit fidelity sampler based on moving platform under water | |
| CN111855280A (en) | Underwater bottom original sample core power inertial collector | |
| US20230273097A1 (en) | Full-sea depth multi-point in-situ sampler, and sampling and transfer method using the same | |
| EP0345112B1 (en) | Device for anchoring a probe in a well by expanding mobile arms | |
| CN218098700U (en) | Confining pressure testing device for Hopkinson bar testing system | |
| CN106501017B (en) | Self-locking pressure-maintaining sealing cover of deep sea heat-preserving pressure-maintaining cabin | |
| CN211504701U (en) | Full-sea deep macrobiosis sampler with pressure-maintaining storage and transfer functions | |
| US10287831B2 (en) | Lifting device for picking up a member from the bottom of the sea | |
| CN114081020B (en) | Pressure maintaining and capturing device for deep sea large organisms | |
| CN111855308B (en) | Air cabin compression type active pressure-maintaining in-situ seawater sampler and sampling method thereof | |
| CN204694601U (en) | A kind of device for pin hole seepage deformation test | |
| CN211477652U (en) | Pressure-maintaining sampling device for whole-sea deep macrobiology | |
| CN112922550B (en) | Core barrel | |
| CN207488005U (en) | A kind of fan-shaped deep earth sampling device using titanium alloy thin films sealing pressurize | |
| CN206429239U (en) | A kind of water fetching device for being used to obtain desired depth water sample in drilling | |
| CN111103166A (en) | Full-sea deep macrobiosis sampler with pressure-maintaining storage and transfer functions | |
| CN220772421U (en) | Leak-proof antifreezing plug pressure gauge pressure-taking valve with rapid dosing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |