A deep-sea columnar core moving and positioning device

Abstract

The present invention discloses a deep-sea columnar core moving and positioning device, which relates to the technical field of on-site processing of deep-sea cores. It includes a pressure balance driving unit and a pressure-holding cylinder group fixedly connected to the pressure balance driving unit. A lead screw and a moving rod sleeved outside the lead screw are arranged in the pressure-holding cylinder group. One end of the lead screw is connected to the pressure balance driving unit and is driven to rotate by the pressure balance driving unit. A lead screw nut is threadedly connected to the lead screw. One end of the moving rod is fixedly connected to the lead screw nut, and the other end is connected with a gripper for grasping the core. An anti-rotation member is fixedly arranged in the pressure-holding cylinder group and sleeved outside the moving rod to limit the circumferential self-rotation of the moving rod. The rotation of the lead screw can drive the moving rod and the gripper to axially move in and out of the pressure-holding cylinder group. The present invention can quickly transfer and store the core containing combustible ice in the in-situ environment, provide high-quality core samples for further laboratory testing and analysis, and thus obtain more accurate core test data.

Description

Technical Field

[0001] The present invention relates to the technical field of on-site processing of deep-sea cores, and particularly to a mobile positioning device for deep-sea columnar cores. Background Art

[0002] In view of the huge resource potential of combustible ice, countries around the world attach great importance to the research and development of related technologies. Mastering the basic physical property evolution characteristics of combustible ice reservoirs is of great significance for enhancing the comprehensive strength of combustible ice resource exploration and test production. However, the basic physical property simulation experiments and tests of combustible ice reservoirs still mainly rely on artificially prepared combustible ice core samples, resulting in a certain gap between the test results and the understanding of simulation experiments and the engineering requirements of combustible ice exploration and test production. More accurate quasi-in-situ physical property test data are needed for comparison and correction. In view of this, we propose a mobile positioning device for deep-sea columnar cores to quickly transfer and store cores containing combustible ice in an in-situ environment (high pressure and low temperature), providing high-quality core samples for further test analysis in the laboratory. Summary of the Invention

[0003] The purpose of the present invention is to provide a mobile positioning device for deep-sea columnar cores to solve the problems existing in the above-mentioned prior art, which can quickly transfer and store cores containing combustible ice in an in-situ environment (high pressure and low temperature), providing high-quality core samples for further test analysis in the laboratory, so as to obtain more accurate core test data.

[0004] To achieve the above purpose, the present invention provides the following solution:

[0005] The present invention provides a mobile positioning device for deep-sea columnar cores, including a pressure balance driving unit and a pressure-holding cylinder group fixedly connected to the pressure balance driving unit. A lead screw and a moving rod sleeved outside the lead screw are arranged in the pressure-holding cylinder group. One end of the lead screw is connected to the pressure balance driving unit and is driven to rotate by the pressure balance driving unit. A lead screw nut is threadedly connected to the lead screw. One end of the moving rod is fixedly connected to the lead screw nut, and the other end is connected with a gripper for gripping the core. An anti-rotation member is fixedly arranged in the pressure-holding cylinder group and sleeved outside the moving rod to limit the circumferential self-rotation of the moving rod. The rotation of the lead screw can drive the moving rod and the gripper to axially enter and exit the pressure-holding cylinder group.

[0006] In one embodiment, the pressure balance driving unit includes a motor, a gear transmission assembly, and a blind cover, a balance left chamber, a balance chamber bearing plate, a balance right chamber, a long-stroke balance chamber, and a connection chamber arranged in sequence; the gear transmission assembly includes a balance main shaft, a balance sub-shaft, a first gear, a second gear, and a third gear;

[0007] The blind cover is hermetically connected to the left balance chamber and connected to the long-stroke balance chamber through a long bolt. One end of the right balance chamber is connected to the left balance chamber through a card slot, and the other end is hermetically connected to one end of the long-stroke balance chamber. The other end of the long-stroke balance chamber is hermetically connected to one end of the connection chamber. The other end of the connection chamber is hermetically connected to the pressure-holding cylinder group. There are two balance chamber bearing plates, which are respectively installed on the left balance chamber and the right balance chamber, and the two balance chamber bearing plates are kept parallel. Both ends of the balance main shaft are respectively installed on the two balance chamber bearing plates through bearings. One end of the balance main shaft extends into the interior of the left balance chamber and is hermetically connected to the interior of the left balance chamber, and the other end extends into the interior of the right balance chamber and is hermetically connected to the interior of the right balance chamber;

[0008] The third gear is installed on the balance main shaft through a flat key. The third gear is located between the two balance chamber bearing plates. Both ends of the balance auxiliary shaft are respectively installed on the two balance chamber bearing plates through bearings. The second gear is installed on the balance auxiliary shaft through a flat key and meshes with the third gear. The motor is fixedly installed on the balance chamber bearing plate. The first gear is installed on the output shaft of the motor through a flat key and meshes with the second gear.

[0009] In one embodiment, the two balance chamber bearing plates are connected by a reinforcing plate, and the reinforcing plate is connected to the balance chamber bearing plate by bolts; the lead screw passes through the long-stroke balance chamber and the connection chamber and is connected to the balance main shaft through a coupling.

[0010] In one embodiment, one end of the balance main shaft located inside the right balance chamber is sleeved with a first sealing copper sleeve and is hermetically connected to the right balance chamber through the first sealing copper sleeve. A first copper sleeve gland is installed on the first sealing copper sleeve through bolts. The first copper sleeve gland is sleeved on the balance main shaft. There is a first step inside the right balance chamber for axially limiting the first copper sleeve gland;

[0011] One end of the balance main shaft located inside the left balance chamber is sleeved with a second sealing copper sleeve and is hermetically connected to the left balance chamber through the second sealing copper sleeve. A second copper sleeve gland is installed on the second sealing copper sleeve through bolts. The second copper sleeve gland is sleeved on the balance main shaft. There is a second step inside the left balance chamber for axially limiting the second copper sleeve gland.

[0012] In one embodiment, the interior of the pressure balance driving unit is communicated with the interior of the pressure-holding cylinder group.

[0013] In one embodiment, a water inlet is opened on the blind cover, and the water inlet is communicated with the interior of the pressure-holding cylinder group through a pipeline.

[0014] In one embodiment, the pressure-holding cylinder group includes at least one pressure-holding cylinder. When there are at least two pressure-holding cylinders in the pressure-holding cylinder group, the pressure-holding cylinders are connected in sequence.

[0015] In one embodiment, the pressure-holding cylinder group has two pressure-holding cylinders, namely a first pressure-holding cylinder and a second pressure-holding cylinder. One end of the first pressure-holding cylinder is fixedly connected to the pressure balance driving unit, and the other end is threadedly connected with a first end cap. One end of the second pressure-holding cylinder is threadedly connected with a second end cap, and the second end cap is connected to the first end cap through a hoop. The other end of the second pressure-holding cylinder is threadedly connected with a third end cap.

[0016] In one embodiment, the moving rod is a hexagonal aluminum rod, and the anti-rotation member is a hexagonal copper sleeve that cooperates with the hexagonal aluminum rod; the gripper is connected to the moving rod through a transition block.

[0017] In one embodiment, one end of the lead screw away from the pressure balance driving unit is connected with a guiding nut, and the guiding nut is used to guide and support the moving rod.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] The deep-sea columnar core moving and positioning device provided by the present invention drives the lead screw to rotate through the pressure balance driving unit. The rotation of the lead screw can drive the moving rod and the gripper to axially enter and exit the pressure-holding cylinder group. Therefore, after the core is grabbed by the gripper, the core can be retracted and stored in the pressure-holding cylinder group. The pressure-holding cylinder group is filled with low-temperature seawater and is in a high-pressure environment, providing a stable high-pressure and low-temperature environment for the columnar core to ensure that the core is in an environment close to the seabed pressure and temperature, avoiding the decomposition of the combustible ice therein due to temperature rise or pressure reduction, thereby ensuring the quality of the core sample, providing a high-quality core sample for further test analysis in the laboratory, ensuring the authenticity and reliability of the test data, and thus obtaining more accurate core test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the deep-sea columnar core moving and positioning device in the embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional view of the deep-sea columnar core moving and positioning device in the embodiment of the present invention;

[0023] Figure 3 This is a partial enlarged view of the connection between the pressure balance driving unit and the pressure holding cylinder group in the embodiment of the present invention.

[0024] In the figure: 1 - pressure balance driving unit, 2 - pressure holding cylinder group, 201 - first pressure holding cylinder, 202 - second pressure holding cylinder, 3 - first end cover, 4 - hoop, 5 - second end cover, 6 - anti-rotation part, 7 - third end cover, 8 - blind cover, 9 - balance left cavity, 10 - balance cavity bearing plate, 11 - balance right cavity, 12 - long-stroke balance cavity, 13 - connection cavity, 14 - lead screw, 15 - moving rod, 16 - guiding nut, 17 - transition block, 18 - gripper, 19 - lead screw nut, 20 - coupling, 21 - first copper sleeve gland, 22 - first sealing copper sleeve, 23 - reinforcing plate, 24 - motor, 25 - first gear, 26 - second gear, 27 - balance auxiliary shaft, 28 - third gear, 29 - balance main shaft, 30 - second sealing copper sleeve, 31 - second copper sleeve gland, 32 - long bolt. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] The object of the present invention is to provide a deep-sea columnar core moving and positioning device to solve the problems existing in the prior art, and can quickly transfer and store the core containing combustible ice in the in-situ environment (high pressure and low temperature), provide high-quality core samples for further laboratory test analysis, and thus obtain more accurate core test data.

[0027] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as Figures 1 - 3As shown in the figure, this embodiment provides a deep-sea columnar core moving and positioning device, which includes a pressure balance driving unit 1 and a pressure-holding cylinder group 2 fixedly connected to the pressure balance driving unit 1. A lead screw 14 and a moving rod 15 sleeved outside the lead screw 14 are arranged in the pressure-holding cylinder group 2. One end of the lead screw 14 is connected to the pressure balance driving unit 1 and is driven to rotate by the pressure balance driving unit 1. A lead screw nut 19 is threadedly connected to the lead screw 14. One end of the moving rod 15 is fixedly connected to the lead screw nut 19, and the other end is connected to a gripper 18. The gripper 18 is used to grab the core. An anti-rotation member 6 is fixedly arranged in the pressure-holding cylinder group 2. The anti-rotation member 6 is sleeved outside the moving rod 15 and is used to limit the circumferential self-rotation of the moving rod 15. The rotation of the lead screw 14 can drive the moving rod 15 and the gripper 18 to axially enter and exit the pressure-holding cylinder group 2, so that the moving rod 15 and the gripper 18 can extend out of the pressure-holding cylinder group 2 or retract into the pressure-holding cylinder group 2 inward.

[0029] In this embodiment, the pressure balance driving unit 1 includes a motor 24, a gear transmission assembly, and a gland 8, a balance left chamber 9, a balance chamber bearing plate 10, a balance right chamber 11, a long-stroke balance chamber 12, and a connection chamber 13 arranged in sequence; the gear transmission assembly includes a balance main shaft 29, a balance sub-shaft 27, a first gear 25, a second gear 26, and a third gear 28;

[0030] The gland 8 is hermetically connected to the balance left chamber 9 and is connected to the long-stroke balance chamber 12 through a long bolt 32. One end of the balance right chamber 11 is connected to the balance left chamber 9 through a card slot, and the other end is hermetically connected to one end of the long-stroke balance chamber 12. The other end of the long-stroke balance chamber 12 is hermetically connected to one end of the connection chamber 13. The other end of the connection chamber 13 is hermetically connected to the pressure-holding cylinder group 2. There are two balance chamber bearing plates 10, which are respectively installed on the balance left chamber 9 and the balance right chamber 11, and the two balance chamber bearing plates 10 are kept parallel. Both ends of the balance main shaft 29 are installed on the two balance chamber bearing plates 10 through bearings. One end of the balance main shaft 29 extends into the balance left chamber 9 and is hermetically connected to the inside of the balance left chamber 9, and the other end extends into the balance right chamber 11 and is hermetically connected to the inside of the balance right chamber 11;

[0031] The third gear 28 is installed on the balance main shaft 29 through a flat key. The third gear 28 is located between the two balance chamber bearing plates 10. Both ends of the balance sub-shaft 27 are installed on the two balance chamber bearing plates 10 through bearings. The second gear 26 is installed on the balance sub-shaft 27 through a flat key and meshes with the third gear 28. The motor 24 is fixedly installed on the balance chamber bearing plate 10. The first gear 25 is installed on the output shaft of the motor 24 through a flat key and meshes with the second gear 26.

[0032] Driven by the motor 24 and through the transmission of the gear transmission assembly, the lead screw 14 is driven to rotate. The rotation of the lead screw 14 drives the moving rod 15 and the gripper 18 to axially move in and out of the pressure-holding cylinder group 2, so as to realize the movement and positioning of the core.

[0033] In this embodiment, the two balance chamber bearing plates 10 are connected by a reinforcing plate 23. The reinforcing plate 23 is connected to the balance chamber bearing plate 10 by bolts to enhance the stability of the balance chamber bearing plate 10. The lead screw 14 passes through the long-stroke balance chamber 12 and the connection chamber 13 and is connected to the balance main shaft 29 through a coupling 20.

[0034] In this embodiment, a first sealing copper sleeve 22 is sleeved on one end of the balance main shaft 29 located inside the balance right chamber 11, and is hermetically connected to the balance right chamber 11 through the first sealing copper sleeve 22. The inner side surface of the first sealing copper sleeve 22 and the outer side surface of the balance main shaft 29 are sealed. A first copper sleeve gland 21 is installed on the first sealing copper sleeve 22 by bolts. The first copper sleeve gland 21 is sleeved on the balance main shaft 29. A first step is provided inside the balance right chamber 11 for axially limiting the first copper sleeve gland 21.

[0035] A second sealing copper sleeve 30 is sleeved on one end of the balance main shaft 29 located inside the balance left chamber 9, and is hermetically connected to the balance left chamber 9 through the second sealing copper sleeve 30. The inner side surface of the second sealing copper sleeve 30 and the outer side surface of the balance main shaft 29 are sealed. A second copper sleeve gland 31 is installed on the second sealing copper sleeve 30 by bolts. The second copper sleeve gland 31 is sleeved on the balance main shaft 29. A second step is provided inside the balance left chamber 9 for axially limiting the second copper sleeve gland 31.

[0036] Among them, the inside of the pressure balance driving unit 1 is communicated with the inside of the pressure-holding cylinder group 2. Specifically, in this embodiment, a water inlet is opened on the blank cover 8, and the water inlet is communicated with the inside of the pressure-holding cylinder group 2 through a pipeline. To ensure the pressure balance between the inside of the pressure balance driving unit 1 and the inside of the pressure-holding cylinder group 2, so as to ensure the balanced force at both ends of the lead screw 14.

[0037] Among them, the pressure-holding cylinder group 2 includes at least one pressure-holding cylinder. When there are at least two pressure-holding cylinders in the pressure-holding cylinder group 2, the pressure-holding cylinders are connected in sequence. Specifically, in this embodiment, the pressure-holding cylinder group 2 is provided with two pressure-holding cylinders, namely a first pressure-holding cylinder 201 and a second pressure-holding cylinder 202. One end of the first pressure-holding cylinder 201 is fixedly connected to the pressure balance driving unit 1, and the other end is threadedly connected with a first end cap 3. One end of the second pressure-holding cylinder 202 is threadedly connected with a second end cap 5. The second end cap 5 and the first end cap 3 are connected by a hoop 4. The other end of the second pressure-holding cylinder 202 is threadedly connected with a third end cap 7. The first pressure-holding cylinder 201 and the second pressure-holding cylinder 202 provide a stable high-pressure and low-temperature environment for the columnar core, and at the same time provide a temporary storage space for the columnar core. The quick installation and disassembly of the two pressure-holding cylinders can be realized through the hoop 4. The third end cap 7 is used to connect with other devices (such as a core cutting device and a core detection device) so as to cooperate with the on-line detection system to complete the test analysis of the core during the transfer process, obtain the test data of the core in the first time, or cooperate with the core cutting device to complete the precise segmented cutting of the core, and provide high-quality core samples for further test analysis in the laboratory.

[0038] In this embodiment, the moving rod 15 is a hexagonal aluminum rod, and the anti-rotation member 6 is a hexagonal copper sleeve matched with the hexagonal aluminum rod. The hexagonal copper sleeve is arranged in the first end cap 3, which is convenient for disassembly and assembly; the gripper 18 is connected to the moving rod 15 through a transition block 17.

[0039] In this embodiment, one end of the lead screw 14 far away from the pressure balance driving unit 1 is connected with a guiding nut 16, and the guiding nut 16 is used for guiding and supporting the moving rod 15.

[0040] The working process of this device is as follows:

[0041] Before starting work, the lead screw nut 19 is located at the starting position, that is, at one end of the lead screw 14 close to the pressure balance drive unit 1. When starting work, the motor 24 rotates and drives the balance main shaft 29 to rotate through the first gear 25, the second gear 26 and the third gear 28, and then drives the lead screw 14 to rotate through the coupling 20. As the lead screw 14 rotates, the lead screw nut 19 moves to the right and drives the hexagonal aluminum rod (the moving rod 15) and the gripper 18 to move to the right to grab the core. After grabbing the core, the left or right movement of the core can be controlled by changing the forward and reverse rotation of the motor 24, and the movement speed of the core can be controlled by adjusting the rotation speed of the motor 24 to cooperate with the detection system to complete the on-line detection of the core. During the movement of the core, the distance of the core movement and the position of the core can be calculated by monitoring the number of turns of the motor 24. This function is particularly important when cooperating with the core cutting device to segment the core, and any length of core segment required by the laboratory test device can be cut through the positioning function of the device. During the whole working process, the first pressure-holding cylinder 201 and the second pressure-holding cylinder 202 are filled with low-temperature seawater and are in a high-pressure environment to ensure that the core is in an environment close to the seabed pressure and temperature, and to prevent the combustible ice in it from decomposing due to temperature rise or pressure reduction, so as to ensure the quality of the core sample and the authenticity and reliability of the test data.

[0042] This device can quickly transfer and store the core containing combustible ice in the in-situ environment (high pressure and low temperature), and can cooperate with the on-line detection system to complete the test analysis of the core during the transfer process, and obtain the test data of the core in the first time; it can also cooperate with the core cutting device to complete the precise segmentation of the core and provide high-quality core samples for further test analysis in the laboratory.

[0043] In the present invention, specific examples are used to elaborate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A deep-sea columnar core moving and positioning device, characterized in that: It includes a pressure balance driving unit and a pressure maintaining cylinder group fixedly connected to the pressure balance driving unit. A lead screw and a moving rod sleeved outside the lead screw are arranged in the pressure maintaining cylinder group. One end of the lead screw is connected to the pressure balance driving unit and is driven to rotate by the pressure balance driving unit. A lead screw nut is threadedly connected to the lead screw. One end of the moving rod is fixedly connected to the lead screw nut, and the other end is connected with a gripper for gripping the core. An anti-rotation member is fixedly arranged in the pressure maintaining cylinder group and sleeved outside the moving rod to limit the circumferential self-rotation of the moving rod. The rotation of the lead screw can drive the moving rod and the gripper to axially enter and exit the pressure maintaining cylinder group; The pressure balance driving unit includes a motor, a gear transmission assembly, and a blind cover, a balance left cavity, a balance cavity bearing plate, a balance right cavity, a long-stroke balance cavity, and a connection cavity arranged in sequence; the gear transmission assembly includes a balance main shaft, a balance sub-shaft, a first gear, a second gear, and a third gear; The blind cover is hermetically connected to the balance left cavity and connected to the long-stroke balance cavity through a long bolt. One end of the balance right cavity is connected to the balance left cavity through a card slot, and the other end is hermetically connected to one end of the long-stroke balance cavity. The other end of the long-stroke balance cavity is hermetically connected to one end of the connection cavity, and the other end of the connection cavity is hermetically connected to the pressure maintaining cylinder group. There are two balance cavity bearing plates, which are respectively installed on the balance left cavity and the balance right cavity, and the two balance cavity bearing plates are kept parallel. Both ends of the balance main shaft are installed on the two balance cavity bearing plates through bearings. One end of the balance main shaft extends into the balance left cavity and is hermetically connected to the inside of the balance left cavity, and the other end extends into the balance right cavity and is hermetically connected to the inside of the balance right cavity; The third gear is installed on the balance main shaft through a flat key and is located between the two balance cavity bearing plates. Both ends of the balance sub-shaft are installed on the two balance cavity bearing plates through bearings. The second gear is installed on the balance sub-shaft through a flat key and meshes with the third gear. The motor is fixedly installed on the balance cavity bearing plate. The first gear is installed on the output shaft of the motor through a flat key and meshes with the second gear; The lead screw passes through the long-stroke balance cavity and the connection cavity and is connected to the balance main shaft through a coupling; The inside of the pressure balance driving unit is communicated with the inside of the pressure maintaining cylinder group. A water inlet is opened on the blind cover, and the water inlet is communicated with the inside of the pressure maintaining cylinder group through a pipeline.

2. The deep-sea columnar core moving and positioning device according to claim 1, characterized in that: The two balance cavity bearing plates are connected by a reinforcing plate, and the reinforcing plate is connected to the balance cavity bearing plate through bolts.

3. The deep-sea columnar core moving and positioning device according to claim 1, wherein: One end of the balance main shaft located inside the balance right cavity is sleeved with a first sealing copper sleeve and is hermetically connected to the balance right cavity through the first sealing copper sleeve. A first copper sleeve gland is installed on the first sealing copper sleeve through bolts and is sleeved on the balance main shaft. A first step is arranged inside the balance right cavity for axially limiting the first copper sleeve gland; One end of the balance main shaft located inside the balance left cavity is sleeved with a second sealing copper sleeve, and is hermetically connected to the balance left cavity through the second sealing copper sleeve. A second copper sleeve gland is installed on the second sealing copper sleeve through bolts. The second copper sleeve gland is sleeved on the balance main shaft. A second step is provided inside the balance left cavity for axially limiting the second copper sleeve gland.

4. The deep-sea columnar core moving and positioning device according to claim 1, characterized in that: The pressure holding cylinder group includes at least one pressure holding cylinder. When there are at least two pressure holding cylinders in the pressure holding cylinder group, the pressure holding cylinders are connected in sequence.

5. The deep-sea columnar core moving and positioning device according to claim 4, characterized in that: The pressure holding cylinder group is provided with two pressure holding cylinders, namely a first pressure holding cylinder and a second pressure holding cylinder. One end of the first pressure holding cylinder is fixedly connected to the pressure balance driving unit, and the other end is threadedly connected with a first end cover. One end of the second pressure holding cylinder is threadedly connected with a second end cover. The second end cover and the first end cover are connected by a hoop. The other end of the second pressure holding cylinder is threadedly connected with a third end cover.

6. The deep-sea columnar core moving and positioning device according to claim 1, characterized in that: The moving rod is a hexagonal aluminum rod, and the anti-rotation part is a hexagonal copper sleeve that cooperates with the hexagonal aluminum rod; the gripper is connected to the moving rod through a transition block.

7. The deep-sea columnar core moving and positioning device according to claim 1, characterized in that: One end of the lead screw away from the pressure balance driving unit is connected with a guiding nut, and the guiding nut is used for guiding and supporting the moving rod.

Images