A multi-stage sealed storage device for rock core storage and its usage method

Abstract

This invention discloses a multi-stage sealed storage device for rock core storage and its usage method, applied in the field of rock core storage container technology. The invention features a hot melt adhesive injection pipe connected to an insert plate groove via a second injection hole, and an inert gas injection pipe connected to the interior of the upper and lower sealing caps via a first injection hole. Hot melt adhesive is then injected into the hot melt adhesive injection pipe, and after solidification, it completely seals the upper and lower sealing caps. When the rock core needs to be removed, the hot melt adhesive is simply heated, avoiding direct damage to the stored rock core. Furthermore, by injecting inert gas into the inert gas injection pipe, the interior of the upper and lower sealing caps is made to resemble the high-pressure environment of the Earth's core, allowing for longer storage of the rock core while preserving its internal structure. This allows for effective preservation of the rock core without the need for resin casting.

Description

Technical Field

[0001] This invention belongs to the field of rock core storage container technology, and specifically relates to a multi-stage sealed storage device for rock core storage and its usage method. Background Technology

[0002] In the early stages of shale gas exploration, core flow experiments are indispensable for many scientific studies. The test object of core flow experiments is the rock core, a cylindrical rock sample extracted using a core ring drill bit and other coring tools. Cores are crucial physical materials for studying geological and mineral conditions. After extraction, the cores need to be stored in shale core boxes. Due to the large volume of shale gas drilling and the long core extraction sections, a large number of cores are obtained. Because of limited space in the core storage facility, some shale core boxes used for core storage can be placed in the storage facility, while others are stacked in an open storage area.

[0003] Currently, Chinese invention publication number CN113023053A discloses a drilling core box suitable for placing cores of different apertures, relating to the field of core storage. To address the problem that the specifications of the core placement area within the core box are fixed, but the apertures of the cores vary due to different borehole types or uses, making it difficult for a fixed-specification core box to accommodate cores of different apertures, thus reducing the practicality of the core box, this invention includes a box body and several partitions. The partitions are all housed within the box body, and an adjusting component for locking the partitions is provided between the partitions and the box body. The adjusting component is connected to the partitions. This application improves the practicality of placing cores in the core box.

[0004] Currently, most commonly used core storage containers are prefabricated and mass-produced to different sizes. Different core sizes require different storage containers. However, in actual engineering projects, cores brought out by drilling equipment often break, and the length of the broken core is not controllable. Therefore, it often happens that the core storage container cannot accommodate the drilled core. Longer cores allow researchers to better understand geological structures, and intentionally breaking them is obviously a waste. Furthermore, as the core is drilled out of the Earth's core, it is damaged by the surface environment over time. By the time staff retrieve a suitable core storage container, the core surface is already severely damaged, significantly affecting research results. Additionally, drilling... The core samples also include relatively fragile rock cores such as mudstone and sandstone. These cores are particularly prone to breakage during transportation due to strong vibrations, requiring subsequent repairs using adhesives, which is quite troublesome. Furthermore, as mentioned above, the core samples are damaged by the surface environment over time when drilled out of the Earth's core. Current core storage methods mainly involve pouring transparent resin into the cores to achieve long-term storage. However, this method has significant drawbacks. Once the resin has completely hardened, the cores cannot be removed from it, as both thermal melting and brute force will damage the internal cores. Therefore, we have proposed a multi-stage sealed storage device for core storage. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage sealed storage device for rock core storage, which has the advantages of extending the storage space according to the length of the rock core, reducing the risk of the rock core breaking due to strong shocks, and preserving the rock core well without the use of resin casting.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a multi-stage sealed storage device for core storage, comprising an upper sealing cover and a lower sealing cover, wherein a sealing insert plate is fixedly connected to the bottom of the upper sealing cover, and an insert plate groove that is slidably connected to the sealing insert plate is opened inside the lower sealing cover. One side of the lower sealing cover is respectively connected to a hot melt adhesive injection pipe and an inert gas injection pipe through a conducting mechanism. A first U-shaped placement plate and a second U-shaped placement plate are respectively provided on one side inside the upper sealing cover and the lower sealing cover. A third U-shaped placement plate is provided on one side of the first U-shaped placement plate and the second U-shaped placement plate. The first U-shaped placement plate and the second U-shaped placement plate are fixedly connected to the upper sealing cover, the lower sealing cover and the third U-shaped placement plate through an extension mechanism. The upper sealing cover and the lower sealing cover are each provided with a vibration damping mechanism that works in conjunction with the first U-shaped placement plate, the second U-shaped placement plate and the third U-shaped placement plate.

[0007] By adopting the above technical solution, the electric telescopic rod is controlled to drive the first, second, and third U-shaped placement plates to stretch to both sides inside the upper and lower sealing covers, so that the extended U-shaped plates can slide inside the U-shaped groove. After the limiting slide table slides inside the limiting groove, it is adjusted to the appropriate length for placing the rock core. This achieves the purpose of extending the storage space according to the length of the rock core, which makes it convenient for researchers to place the rock core inside the storage device as soon as it is taken out from the ground, thus improving the applicability of the storage device to rock cores of different lengths. The first and second flow-limiting holes are connected by a dynamic sealing ring, allowing the hot melt adhesive injection pipe to connect with the insert plate groove through the second injection hole. Meanwhile, the inert gas injection pipe connects with the interior of the upper and lower sealing caps through the first injection hole. Hot melt adhesive is then injected into the hot melt adhesive injection pipe, and after solidification, it completely seals the upper and lower sealing caps. When the rock core needs to be removed, the hot melt adhesive is simply heated, avoiding direct damage to the stored rock core. Furthermore, by injecting inert gas into the inert gas injection pipe, the interior of the upper and lower sealing caps is made to resemble the high-pressure environment of the Earth's core, allowing the rock core to be stored for a longer period while maintaining its internal structure. This achieves excellent rock core preservation without resin casting, facilitating repeated research on the rock core by scientists. By repeatedly vibrating the damping springs in the up-and-down direction, the strong jolts experienced by the upper and lower sealing caps can be buffered, transforming them into multiple, gentler swaying motions. The mutual rebound of the two damping springs gradually cancels out the swaying, thus reducing the risk of core breakage due to strong jolts. This reduces the probability of fragile cores breaking during transport, allowing researchers to better study the geology and reducing repeated core extraction, thereby lowering costs.

[0008] The present invention is further configured such that: the guiding mechanism includes a connecting flange fixedly connected to one side of the lower sealing cover; the surfaces of the hot melt adhesive injection pipe and the inert gas injection pipe near the connecting flange are rotatably connected to sealing rings; the sealing rings have a first flow-limiting hole inside; the connecting flange has a second flow-limiting hole on the side near the first flow-limiting hole that cooperates with the first flow-limiting hole; and the lower sealing cover, the insert groove, and the connecting flange all have a first injection hole and a second injection hole that communicate with the inert gas injection pipe and the hot melt adhesive injection pipe, respectively.

[0009] By adopting the above technical solution, hot melt adhesive can be injected into the inside of the insert plate groove for sealing, and inert gas can be injected into the inside of the upper and lower sealing caps to simulate the high-pressure environment of the Earth's core, thereby improving the storage life of the rock core.

[0010] The present invention is further configured such that: the extension mechanism includes an electric telescopic rod and a connecting chain ring disposed on both sides inside the upper sealing cover and the lower sealing cover, respectively. Both ends of the electric telescopic rod are rotatably connected to the upper sealing cover, the lower sealing cover, the first U-shaped placement plate, and the second U-shaped placement plate via the connecting chain ring. An extension U-shaped plate is welded to the side of the first U-shaped placement plate and the second U-shaped placement plate near the third U-shaped placement plate. The interior of the third U-shaped placement plate is provided with a U-shaped groove that is slidably connected to the extension U-shaped plate.

[0011] By adopting the above technical solution, the storage space can be extended according to the length of the rock core.

[0012] The present invention is further configured such that: the vibration damping mechanism includes a telescopic rod fixedly connected to the bottom of the first U-shaped placement plate, the top of the second U-shaped placement plate, and the top and bottom of the third U-shaped placement plate; a limiting slide is fixedly connected to the side of the telescopic rod away from the first U-shaped placement plate, the second U-shaped placement plate, and the third U-shaped placement plate; a limiting slide groove is provided inside the upper sealing cover and the lower sealing cover, which is slidably connected to the limiting slide; and a vibration damping spring is sleeved on the surface of the telescopic rod.

[0013] By adopting the above technical solution, the risk of rock cores breaking due to strong vibrations is reduced.

[0014] The present invention is further configured such that: a rotating handle is rotatably connected to the top of the upper sealing cover, and the surface of the rotating handle is provided with anti-slip texture.

[0015] Using the above technical solution, the upper and lower sealing caps can be lifted up, making it easier to carry the core samples.

[0016] The present invention is further configured such that: a sealing gasket is adhered to the side of the first U-shaped placement plate, the second U-shaped placement plate, and the two third U-shaped placement plates that are close to each other; and a coupling groove that is inserted into each other is fixedly connected to the side of the first U-shaped placement plate, the second U-shaped placement plate, and the two third U-shaped placement plates that are close to each other.

[0017] By adopting the above technical solution, the first U-shaped placement plate, the second U-shaped placement plate, and the two third U-shaped placement plates are coupled together and sealed with gaskets through the coupling groove, thereby enabling secondary sealing of the rock core storage and improving the sealing effect.

[0018] The present invention is further configured such that a pressure sensor for use with an inert gas injection tube is fixedly installed on one side inside the upper sealing cover.

[0019] By adopting the above technical solution, the pressure values ​​inside the upper and lower sealing caps can be detected, which facilitates the injection of inert gas using an inert gas injection pipe.

[0020] The present invention is further configured such that: each of the four corners of the bottom of the lower sealing cover is fixedly connected with a supporting foot, each of the four corners of the top of the upper sealing cover is provided with a foot groove that fits with the supporting foot, and a magnet plate is fixedly installed at the bottom of the supporting foot.

[0021] By adopting the above technical solution, the stability of multiple multi-stage sealed storage units can be improved when they are stacked together, while reducing the floor space occupied by the storage units when they are placed in the warehouse.

[0022] The present invention is further configured such that: the surface of the sealing ring is provided with anti-slip texture, and the inside of the sealing ring is bonded with a sealing membrane that is slidably connected to the hot melt adhesive injection pipe, the inert gas injection pipe and the connecting flange.

[0023] The above technical solution facilitates the rotation of the sealing ring sleeve while preventing hot melt adhesive and inert gas from leaking out from the gaps between the hot melt adhesive injection pipe and the inert gas injection pipe and the sealing ring sleeve, respectively.

[0024] A method for using a multi-stage sealed storage device for rock core storage includes the following steps:

[0025] Step 1. Core Placement: By controlling the electric telescopic rod, the first, second, and third U-shaped placement plates are stretched to both sides inside the upper and lower sealing covers, allowing the extended U-shaped plates to slide inside the U-shaped grooves. After the limiting slide table slides inside the limiting grooves, it is adjusted to the appropriate core placement length. Then, the core is placed inside the first and third U-shaped placement plates, and the upper sealing cover is placed on top of the lower sealing cover, so that the sealing insert is fully inserted into the insert groove. The second U-shaped placement plate can be placed on top of the first U-shaped placement plate to perform a secondary seal on the core.

[0026] Step 2. Sealing with Adhesive: Place the upper sealing cap on top of the lower sealing cap to fully insert the sealing plate into the plate slot. Then, rotate the sealing ring to connect the first and second flow-limiting holes, allowing the hot melt adhesive injection tube to connect with the plate slot through the second injection hole. Next, inject hot melt adhesive into the hot melt adhesive injection tube until it completely fills the gap between the plate slot and the sealing plate. Rotate the sealing ring again to separate the first and second flow-limiting holes and then stop the hot melt adhesive injection. Wait for the hot melt adhesive inside the plate slot to solidify completely.

[0027] Step 3. Injecting and pressurizing gas: By placing the upper sealing cap on top of the lower sealing cap, the sealing plate is fully inserted into the plate slot. Then, the sealing ring is rotated to connect the first and second flow-limiting holes, allowing the inert gas injection pipe to connect with the interior of the upper and lower sealing caps through the first injection hole. After that, inert gas is injected into the inert gas injection pipe to make the interior of the upper and lower sealing caps as high-pressure as possible, like the Earth's core. Then, the sealing ring is rotated again to separate the first and second flow-limiting holes and disconnect the inert gas injection.

[0028] Step 4. Vibration damping during transportation: By placing the rock core inside the first, second, and third U-shaped placement plates and sealing it with the upper and lower sealing covers, the vibration damping springs contract and rebound. At the same time, the telescopic rod restricts the direction of the vibration damping springs' movement. As the vibration damping springs continuously bounce back and forth in the up-down direction, they can buffer the strong jolts experienced by the upper and lower sealing covers, thus transforming them into multiple, gentler swaying motions. The swaying is then gradually canceled out by the mutual rebound of the upper and lower vibration damping springs.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. By controlling the electric telescopic rod, the first U-shaped placement plate, the second U-shaped placement plate, and the third U-shaped placement plate are stretched to both sides inside the upper and lower sealing covers, so that the extended U-shaped plates can slide inside the U-shaped groove. After the limiting slide table slides inside the limiting groove, it is adjusted to the appropriate length for placing the rock core. This achieves the purpose of extending the storage space according to the length of the rock core, so that researchers can place the rock core inside the storage device as soon as it is taken out from the ground, thereby improving the applicability of the storage device to rock cores of different lengths.

[0031] 2. By rotating the sealing ring, the first and second flow-limiting holes can be connected, allowing the hot melt adhesive injection pipe to connect with the insert plate groove through the second injection hole, while the inert gas injection pipe connects with the interior of the upper and lower sealing caps through the first injection hole. Hot melt adhesive is then injected into the hot melt adhesive injection pipe, and after solidification, the upper and lower sealing caps are completely sealed. When the rock core needs to be removed, the hot melt adhesive is simply heated, avoiding direct damage to the stored rock core. Furthermore, by injecting inert gas into the inert gas injection pipe, the interior of the upper and lower sealing caps is made to resemble the high-pressure environment of the Earth's core, allowing the rock core to be stored for a longer period while maintaining its internal structure. This achieves excellent rock core preservation without resin casting, facilitating repeated research on the rock core by scientists.

[0032] 3. By repeatedly bouncing up and down along the vertical direction, the damping springs can buffer the strong jolts experienced by the upper and lower sealing covers, transforming them into multiple, gentler swaying motions. The mutual rebound of the two damping springs gradually cancels out the swaying, thus reducing the risk of core breakage due to strong jolts. This reduces the probability of fragile cores breaking during transportation, allowing researchers to better study the geology and reducing repeated core extraction, thereby lowering costs. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 This is a three-dimensional schematic diagram of the sealing and closing cover structure of the present invention;

[0035] Figure 3 This is a three-dimensional schematic diagram of the sealing and closing structure of the present invention;

[0036] Figure 4 This is a structural cross-sectional view of the present invention;

[0037] Figure 5 This is the invention Figure 4 Enlarged view of point A in the image;

[0038] Figure 6 This is the invention Figure 4 Enlarged view of point B in the image;

[0039] Figure 7 This is the invention Figure 4 Enlarged view of point C in the image;

[0040] Figure 8 This is a partial side view of the structure of the present invention.

[0041] Reference numerals: 1. Upper sealing cover; 2. Lower sealing cover; 3. Sealing insert plate; 4. Insert plate groove; 5. Hot melt adhesive injection pipe; 6. Inert gas injection pipe; 8. First U-shaped placement plate; 9. Second U-shaped placement plate; 10. Third U-shaped placement plate; 11. Sealing gasket; 12. Coupling groove; 13. Pressure sensor; 14. Support foot; 15. Foot groove; 16. Magnet plate; 17. Rotating handle; 101. Sealing ring sleeve; 102. First flow limiting hole; 103. First injection hole; 104. Second flow limiting hole; 105. Connecting flange; 106. Second injection hole; 201. Electric telescopic rod; 202. Connecting chain link; 203. Extending U-shaped plate; 204. U-shaped slide groove; 301. Telescopic rod; 302. Vibration damping spring; 303. Limiting slide groove; 304. Limiting slide table. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Example 1:

[0044] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 A multi-stage sealed storage device for rock core storage includes an upper sealing cover 1 and a lower sealing cover 2. A sealing insert plate 3 is fixedly connected to the bottom of the upper sealing cover 1. An insert plate groove 4, slidably connected to the sealing insert plate 3, is opened inside the lower sealing cover 2. One side of the lower sealing cover 2 is respectively connected to a hot melt adhesive injection pipe 5 and an inert gas injection pipe 6 via a conductive mechanism. A first U-shaped placement plate 8 and a second U-shaped placement plate 9 are respectively provided on one side inside the upper sealing cover 1 and the lower sealing cover 2. Each side of plate 9 is provided with a third U-shaped placement plate 10. The first U-shaped placement plate 8 and the second U-shaped placement plate 9 are fixedly connected to the third U-shaped placement plate 10 via extension mechanisms, upper sealing cover 1 and lower sealing cover 2. The upper sealing cover 1 and lower sealing cover 2 are each provided with a vibration damping mechanism that works in conjunction with the first U-shaped placement plate 8, the second U-shaped placement plate 9 and the third U-shaped placement plate 10. By controlling the electric telescopic rod 201, the first U-shaped placement plate 8, the second U-shaped placement plate 9 and the third U-shaped placement plate 10 are moved... The upper sealing cover 1 and the lower sealing cover 2 are stretched to both sides, allowing the extended U-shaped plate 203 to slide inside the U-shaped chute 204. After the limiting slide 304 slides inside the limiting chute 303, it is adjusted to a suitable length for placing the rock core. This achieves the purpose of extending the storage space according to the length of the rock core, making it convenient for researchers to place the rock core into the storage container as soon as it is taken out from the ground. This improves the applicability of the storage container to rock cores of different lengths. When the damping spring 302 bounces back and forth in the up and down direction, it can buffer the strong bumps received by the upper sealing cover 1 and the lower sealing cover 2, turning them into multiple gentler swaying. The upper and lower damping springs 302 rebound against each other, gradually canceling out the swaying. This reduces the risk of the rock core breaking due to strong bumps, thereby reducing the probability of some fragile rock cores breaking during transportation. This allows researchers to better study geology, while reducing repeated mining of rock cores and lowering costs.

[0045] refer to Figure 2 , Figure 4 , Figure 6 , Figure 7The extension mechanism includes an electric telescopic rod 201 and a connecting chain 202 disposed on both sides inside the upper sealing cover 1 and the lower sealing cover 2. Both ends of the electric telescopic rod 201 are rotatably connected to the upper sealing cover 1, the lower sealing cover 2, the first U-shaped placement plate 8, and the second U-shaped placement plate 9 respectively through the connecting chain 202. An extension U-shaped plate 203 is welded to the side of the first U-shaped placement plate 8 and the second U-shaped placement plate 9 near the third U-shaped placement plate 10. The interior of the third U-shaped placement plate 10 is provided with a U-shaped groove 204 that is slidably connected to the extension U-shaped plate 203, which can extend the storage space according to the length of the rock core.

[0046] refer to Figure 4 , Figure 6 The vibration damping mechanism includes a telescopic rod 301 fixedly connected to the bottom of the first U-shaped placement plate 8, the top of the second U-shaped placement plate 9, and the top and bottom of the third U-shaped placement plate 10. A limiting slide 304 is fixedly connected to the side of the telescopic rod 301 away from the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the third U-shaped placement plate 10. The upper sealing cover 1 and the lower sealing cover 2 are both provided with limiting grooves 303 that are slidably connected to the limiting slide 304. A vibration damping spring 302 is sleeved on the surface of the telescopic rod 301 to reduce the risk of the rock core breaking due to strong bumps.

[0047] refer to Figure 4 , Figure 7 Sealing gaskets 11 are adhered to the sides of the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the two third U-shaped placement plates 10 that are close to each other. Coupling grooves 12 are fixedly connected to the sides of the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the two third U-shaped placement plates 10 that are close to each other. The coupling grooves 12 enable the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the two third U-shaped placement plates 10 to couple with each other and seal the gaskets 11, thereby enabling secondary sealing of the rock core storage and improving the sealing effect.

[0048] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The bottom of the lower sealing cover 2 is fixedly connected to the four corners of the support feet 14, and the top of the upper sealing cover 1 is provided with the four corners of the support feet 14. The bottom of the support feet 14 is fixedly installed with a magnet plate 16, which can improve the stability when multiple multi-level sealed storage containers are stacked together, and at the same time reduce the floor space occupied by the storage containers when placed in the warehouse.

[0049] Brief description of the usage process: When it is necessary to extend the storage space according to the length of the rock core and reduce the risk of the rock core breaking due to strong bumps, the electric telescopic rod 201 is controlled to drive the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the third U-shaped placement plate 10 to stretch to both sides inside the upper sealing cover 1 and the lower sealing cover 2, so that the extended U-shaped plate 203 can slide inside the U-shaped slide groove 204. After the limiting slide table 304 slides inside the limiting slide groove 303, it is adjusted to the appropriate length for placing the rock core. Then, the rock core is placed inside the first U-shaped placement plate 8 and the third U-shaped placement plate 10, and the upper sealing cover 1 is placed on top of the lower sealing cover 2, so that the sealing insert 3 is fully inserted into the insert slot 4, and the first U-shaped placement plate 9 is placed inside the lower sealing cover 204. The second U-shaped placement plate 9 can cover the top of the first U-shaped placement plate 8 to provide a secondary seal for the rock core. By placing the rock core inside the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the third U-shaped placement plate 10, and sealing it with the upper sealing cover 1 and the lower sealing cover 2, the vibration damping spring 302 contracts and rebounds. At the same time, the telescopic rod 301 restricts the direction of the vibration damping spring 302. When the vibration damping spring 302 bounces back and forth in the up and down direction, it can buffer the strong jolts experienced by the upper sealing cover 1 and the lower sealing cover 2, thus turning them into multiple gentle swaying motions. The swaying motion is gradually canceled out by the mutual rebound of the upper and lower vibration damping springs 302.

[0050] Example 2:

[0051] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A multi-stage sealed storage device for rock core storage includes an upper sealing cover 1 and a lower sealing cover 2. A sealing insert plate 3 is fixedly connected to the bottom of the upper sealing cover 1. An insert plate groove 4, slidably connected to the sealing insert plate 3, is opened inside the lower sealing cover 2. One side of the lower sealing cover 2 is connected to a hot melt adhesive injection pipe 5 and an inert gas injection pipe 6 respectively via a conductive mechanism. A first U-shaped placement plate 8 and a second U-shaped placement plate 9 are respectively provided on one side inside the upper sealing cover 1 and the lower sealing cover 2. A third U-shaped placement plate 10 is provided on one side of both the first U-shaped placement plate 8 and the second U-shaped placement plate 9. The first U-shaped placement plate 8 and the second U-shaped placement plate 9 are fixedly connected to the upper sealing cover 1, the lower sealing cover 2, and the third U-shaped placement plate 10 via an extension mechanism. The upper sealing cover 1 and the lower sealing cover 2 are each equipped with a vibration damping mechanism that works in conjunction with the first U-shaped placement plate 8, the second U-shaped placement plate 9, and the third U-shaped placement plate 10. The sealing ring 101 allows the first flow-limiting hole 102 and the second flow-limiting hole 104 to connect, thereby enabling the hot melt adhesive injection pipe 5 to connect with the insert plate groove 4 through the second injection hole 106. The inert gas injection pipe 6 connects with the interior of the upper sealing cap 1 and the lower sealing cap 2 through the first injection hole 103. After hot melt adhesive is injected into the hot melt adhesive injection pipe 5, the upper sealing cap 1 and the lower sealing cap 2 can be completely sealed after the hot melt adhesive solidifies. At the same time, when it is necessary to remove the rock core, only the hot melt adhesive needs to be heated, so as not to directly destroy the rock core stored inside. By injecting inert gas into the inert gas injection pipe 6, the interior of the upper sealing cap 1 and the lower sealing cap 2 is made as high-pressure as possible like the Earth's core, so that the rock core can be stored for a longer time while maintaining its internal structure. This achieves good preservation of the rock core without the use of resin casting, which is convenient for researchers to conduct repeated studies on the rock core.

[0052] refer to Figure 4 , Figure 5 , Figure 8 The guiding mechanism includes a connecting flange 105 fixedly connected to one side of the lower sealing cover 2. A sealing ring 101 is rotatably connected to the surfaces of the hot melt adhesive injection pipe 5 and the inert gas injection pipe 6 near the connecting flange 105. A first flow-limiting hole 102 is opened inside the sealing ring 101. A second flow-limiting hole 104, which works in conjunction with the first flow-limiting hole 102, is opened on the side of the connecting flange 105 near the first flow-limiting hole 102. A first injection hole 103 and a second injection hole 106, respectively communicating with the inert gas injection pipe 6 and the hot melt adhesive injection pipe 5, are opened inside the lower sealing cover 2, the insert plate groove 4, and the connecting flange 105. This allows for the injection of hot melt adhesive into the insert plate groove 4 for sealing, and the injection of inert gas into the upper sealing cover 1 and the lower sealing cover 2 to simulate a high-pressure environment in the Earth's core, thereby improving the lifespan of the core storage.

[0053] refer to Figure 1 , Figure 3 The top of the upper sealing cover 1 is rotatably connected to a rotating handle 17. The surface of the rotating handle 17 is provided with anti-slip texture, which can lift the upper sealing cover 1 and the lower sealing cover 2, thereby facilitating the carrying of the rock core sample.

[0054] refer to Figure 1 , Figure 2 , Figure 5 The surface of the sealing ring 101 is provided with anti-slip texture. Inside the sealing ring 101, there is a sealing membrane that is slidably connected to the hot melt adhesive injection pipe 5, the inert gas injection pipe 6, and the connecting flange 105, which facilitates the rotation of the sealing ring 101 and at the same time prevents the hot melt adhesive and inert gas from leaking out from the gaps between the hot melt adhesive injection pipe 5, the inert gas injection pipe 6, and the sealing ring 101.

[0055] refer to Figure 4 A pressure sensor 13, which works in conjunction with an inert gas injection tube 6, is fixedly installed on one side inside the upper sealing cover 1. It can detect the pressure values ​​inside the upper sealing cover 1 and the lower sealing cover 2, making it convenient to inject inert gas using the inert gas injection tube 6.

[0056] Brief description of the usage process: When it is necessary to preserve the rock core well without using resin casting, the upper sealing cap 1 is placed on top of the lower sealing cap 2, so that the sealing plate 3 is fully inserted into the plate slot 4. Then, the sealing ring 101 is rotated to connect the first flow-limiting hole 102 and the second flow-limiting hole 104, thereby connecting the hot melt adhesive injection pipe 5 with the plate slot 4 through the second injection hole 106. Then, hot melt adhesive is injected into the hot melt adhesive injection pipe 5 to completely fill the gap between the plate slot 4 and the sealing plate 3. The sealing ring 101 is rotated again to shift the first flow-limiting hole 102 and the second flow-limiting hole 104. After opening, disconnect the hot melt adhesive injection and wait for the hot melt adhesive inside the insert plate groove 4 to completely solidify. Then, rotate the sealing ring sleeve 101 to connect the first flow limiting hole 102 and the second flow limiting hole 104, so that the inert gas injection pipe 6 can connect with the interior of the upper sealing cover 1 and the lower sealing cover 2 through the first injection hole 103. Then, inject inert gas into the inert gas injection pipe 6 to make the interior of the upper sealing cover 1 and the lower sealing cover 2 as high-pressure as possible, like the Earth's core. Then, rotate the sealing ring sleeve 101 again to separate the first flow limiting hole 102 and the second flow limiting hole 104 and disconnect the inert gas injection.

Claims

1. A multi-stage sealed storage device for rock core storage, comprising an upper sealing cover (1) and a lower sealing cover (2), characterized in that: A sealing insert plate (3) is fixedly connected to the bottom of the upper sealing cover (1). The lower sealing cover (2) has an insert plate groove (4) that is slidably connected to the sealing insert plate (3). One side of the lower sealing cover (2) is connected to a hot melt adhesive injection pipe (5) and an inert gas injection pipe (6) respectively through a conducting mechanism. A first U-shaped placement plate (8) and a second U-shaped placement plate (9) are respectively provided on one side of the interior of the upper sealing cover (1) and the lower sealing cover (2). A third U-shaped placement plate (10) is provided on one side of both the first U-shaped placement plate (8) and the second U-shaped placement plate (9). The first U-shaped placement plate (8) and the second U-shaped placement plate (9) are fixedly connected to the upper sealing cover (1) and the lower sealing cover (2) through an extension mechanism. The two third U-shaped placement plates (10) All are fixedly connected to the upper sealing cover (1) and the lower sealing cover (2) through an extension mechanism. The upper sealing cover (1) and the lower sealing cover (2) are both provided with a vibration damping mechanism that works in conjunction with the first U-shaped placement plate (8), the second U-shaped placement plate (9) and the third U-shaped placement plate (10). The guiding mechanism includes a connecting flange (105) fixedly connected to one side of the lower sealing cover (2). The hot melt adhesive injection pipe (5) and the inert gas injection pipe (6) are rotatably connected to a sealing ring (101) on the surface near the connecting flange (105). The sealing ring (101) has a first flow limiting hole (102) inside. The connecting flange (105) has a second flow limiting hole (104) that works with the first flow limiting hole (102) on the side near the first flow limiting hole (102). The lower sealing cover (2), the insert groove (4), and the connecting flange (105) all have a first injection hole (103) and a second injection hole (106) that communicate with the inert gas injection pipe (6) and the hot melt adhesive injection pipe (5), respectively.

2. The multi-stage sealed storage device for rock core storage according to claim 1, characterized in that: The extension mechanism includes an electric telescopic rod (201) and a connecting chain (202) disposed on both sides inside the upper sealing cover (1) and the lower sealing cover (2). The two ends of the electric telescopic rod (201) disposed inside the upper sealing cover (1) are rotatably connected to the upper sealing cover (1) and the first U-shaped placement plate (8) respectively through the connecting chain (202). The two ends of the electric telescopic rod (201) disposed inside the lower sealing cover (2) are rotatably connected to the lower sealing cover (2) and the second U-shaped placement plate (9) respectively through the connecting chain (202). An extension U-shaped plate (203) is welded to the side of the first U-shaped placement plate (8) and the second U-shaped placement plate (9) near the third U-shaped placement plate (10). The interior of the third U-shaped placement plate (10) is provided with a U-shaped groove (204) that is slidably connected to the extension U-shaped plate (203).

3. A multi-stage sealed storage device for rock core storage according to claim 2, characterized in that: The vibration damping mechanism includes a telescopic rod (301) fixedly connected to the bottom of the first U-shaped placement plate (8), the top of the second U-shaped placement plate (9), and the top and bottom of the third U-shaped placement plate (10). A limiting slide (304) is fixedly connected to the side of the telescopic rod (301) away from the first U-shaped placement plate (8), the second U-shaped placement plate (9), and the third U-shaped placement plate (10). A limiting groove (303) that is slidably connected to the limiting slide (304) is provided inside the upper sealing cover (1) and the lower sealing cover (2). A vibration damping spring (302) is sleeved on the surface of the telescopic rod (301).

4. A multi-stage sealed storage device for rock core storage according to claim 3, characterized in that: The top of the upper sealing cover (1) is rotatably connected to a rotating handle (17), and the surface of the rotating handle (17) is provided with anti-slip texture.

5. A multi-stage sealed storage device for rock core storage according to claim 3, characterized in that: Sealing gaskets (11) are glued to the sides of the first U-shaped placement plate (8), the second U-shaped placement plate (9), and the two third U-shaped placement plates (10) that are close to each other. Coupling grooves (12) that are inserted into each other are fixedly connected to the sides of the first U-shaped placement plate (8), the second U-shaped placement plate (9), and the two third U-shaped placement plates (10) that are close to each other.

6. A multi-stage sealed storage device for rock core storage according to claim 3, characterized in that: A pressure sensor (13) is fixedly installed on one side inside the upper sealing cover (1) in conjunction with the inert gas injection tube (6).

7. A multi-stage sealed storage device for rock core storage according to claim 3, characterized in that: The lower sealing cover (2) has four corners of the bottom fixedly connected with support feet (14), and the upper sealing cover (1) has four corners of the top with foot grooves (15) that fit with the support feet (14). The bottom of the support feet (14) is fixedly installed with a magnet plate (16).

8. A multi-stage sealed storage device for rock core storage according to claim 3, characterized in that: The surface of the sealing ring (101) is provided with anti-slip texture, and the inside of the sealing ring (101) is bonded with a sealing membrane that is slidably connected to the hot melt adhesive injection pipe (5), the inert gas injection pipe (6), and the connecting flange (105).

9. A method of using a multi-stage sealed storage device for core storage, as described in any one of claims 3-8, characterized in that: Includes the following steps: Step 1. Core placement: By controlling the electric telescopic rod (201), the first U-shaped placement plate (8), the second U-shaped placement plate (9), and the third U-shaped placement plate (10) are stretched to both sides inside the upper sealing cover (1) and the lower sealing cover (2), so that the extended U-shaped plate (203) can slide inside the U-shaped groove (204). After the limiting slide (304) slides inside the limiting groove (303), it is adjusted to the appropriate core placement length. Then, the core is placed inside the first U-shaped placement plate (8) and the third U-shaped placement plate (10), and the upper sealing cover (1) is placed on top of the lower sealing cover (2), so that the sealing insert (3) is fully inserted into the insert groove (4), and the second U-shaped placement plate (9) can be placed on top of the first U-shaped placement plate (8) to perform secondary sealing of the core. Step 2. Sealing with adhesive: By placing the upper sealing cap (1) on top of the lower sealing cap (2), the sealing insert (3) is fully inserted into the insert groove (4). Then, the sealing ring (101) is rotated to connect the first flow-limiting hole (102) and the second flow-limiting hole (104), so that the hot melt adhesive injection tube (5) is connected to the insert groove (4) through the second injection hole (106). Then, hot melt adhesive is injected into the hot melt adhesive injection tube (5) to completely fill the gap between the insert groove (4) and the sealing insert (3). The sealing ring (101) is rotated again to separate the first flow-limiting hole (102) and the second flow-limiting hole (104) and disconnect the hot melt adhesive injection. Wait for the hot melt adhesive inside the insert groove (4) to solidify completely. Step 3. Injecting and pressurizing gas: By placing the upper sealing cap (1) on top of the lower sealing cap (2), the sealing insert (3) is fully inserted into the insert groove (4). Then, the sealing ring sleeve (101) is rotated to connect the first flow limiting hole (102) and the second flow limiting hole (104), so that the inert gas injection pipe (6) is connected to the interior of the upper sealing cap (1) and the lower sealing cap (2) through the first injection hole (103). Then, by injecting inert gas into the interior of the inert gas injection pipe (6), the interior of the upper sealing cap (1) and the lower sealing cap (2) is made as high-pressure as possible, like the one in the Earth's core. Then, the sealing ring sleeve (101) is rotated again to separate the first flow limiting hole (102) and the second flow limiting hole (104) and the inert gas injection is disconnected. Step 4. Vibration reduction during transport: By placing the rock core inside the first U-shaped placement plate (8), the second U-shaped placement plate (9), and the third U-shaped placement plate (10), and sealing it with the upper sealing cover (1) and the lower sealing cover (2), the vibration damping spring (302) contracts and rebounds. At the same time, the telescopic rod (301) restricts the direction of the vibration damping spring (302). When the vibration damping spring (302) bounces back and forth in the up and down direction, it can buffer the strong jolts on the upper sealing cover (1) and the lower sealing cover (2), thus turning it into multiple gentle swaying. The swaying is gradually canceled out by the mutual rebound of the upper and lower vibration damping springs (302).

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