Sampling and storing device based on coal mine exploration

Abstract

The invention discloses a sampling storage device based on coal mine exploration, and relates to the technical field of coal mine exploration, the sampling storage device comprises an outer pipe body, an inner pipe body is arranged in the outer pipe body, the top of the inner pipe body is fixedly connected with a spearhead body, and the bottom of the spearhead body is provided with a protection mechanism. By arranging the protection mechanism, when a high-hardness foreign matter enters a clamped area of the spearhead body, friction force between the foreign matter and impurities and the spearhead body and the clamping jaws is reduced through cooperation of a supporting ring and a lubricating bag body under cooperation of the thrust of the clamping jaws and the lubricating bag body, abrasion to the spearhead body and the clamping jaws is reduced, and the service life of the spearhead body and the clamping jaws is prolonged. In addition, smooth foreign matter can slide in the clamping area, the problem that hard foreign matter causes large abrasion to the spearhead body and the clamping jaws and the problem of unhooking when the inner pipe body is taken out are effectively avoided, the defects in the prior art are overcome, the service life of the inner pipe body is prolonged, and the safety when the inner pipe body is taken out is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mine exploration technology, specifically to a sampling and preservation device based on coal mine exploration. Background Technology

[0002] With increasingly stringent safety requirements for coal mining, it is crucial to understand information such as the coal seam structure in advance before mining operations. Therefore, before mining begins, it is necessary to conduct exploration and sampling work to ensure the safety of subsequent mining operations.

[0003] The existing sampling and preservation device consists of three parts: an outer tube assembly, an inner tube assembly, and a retrieval device assembly. The inner tube is located inside the outer tube. During use, drilling is performed at the bottom of the outer tube. The inner tube is responsible for collecting and preserving the core sample. While drilling the outer tube, the drilling fluid circulates in the gap between the outer and inner tubes, carrying away the drilling cuttings. After the sample collection is completed, the retrieval device is inserted into the inner tube. The retrieval device's grippers work in conjunction with the spearhead at the top of the inner tube to retrieve the inner tube and the sample.

[0004] While the aforementioned device can effectively preserve and extract samples, in actual use, the high-speed flowing drilling fluid carries a large amount of rock cuttings. Even with filters or circulation channels, fine particles can still enter and remain in the spearhead area at the top of the inner tube. When the sampled rock strata contain hard mineral particles (such as quartz, feldspar, and flint), these particles settle in the spearhead area. Consequently, when the retrieval device's grippers hold the spearhead, the clamping force is insufficient to crush them, leaving them between the grippers and the spearhead. This can easily cause wear on both the spearhead and the grippers, and in some cases, due to the large number of particles, the spearhead and grippers may become loosely connected, leading to disengagement when the inner tube is removed. This affects the device's lifespan and hinders its sampling capabilities. Summary of the Invention

[0005] In view of this, the present invention proposes a sampling and preservation device based on coal mine exploration to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sampling and preservation device based on coal mine exploration, comprising an outer tube body, an inner tube body disposed inside the outer tube body, a spearhead body fixedly connected to the top of the inner tube body, and a protective mechanism disposed at the bottom of the spearhead body, for reducing the friction between high-hardness impurities and the spearhead body and the grippers when the grippers clamp the spearhead body.

[0007] The protective mechanism includes a mounting ring, which is fixedly sleeved on the outer surface of the spearhead body. A connecting rod is fixedly connected to the outer surface of the mounting ring, and a support ring is fixedly connected to the top of the connecting rod. A lubricating bladder is provided in the annular groove of the support ring. The lubricating bladder automatically ruptures when subjected to pressure, reducing the friction coefficient at the rupture area of ​​the lubricating bladder. The protective mechanism includes a protective component for auxiliary protection of the spearhead body and the lubricating bladder.

[0008] Preferably, a plurality of limiting protrusions are fixedly connected in the annular groove of the support ring. The limiting protrusions are arranged in an arc shape, and the arc-shaped outer surface of the limiting protrusions is located on the same plane as the outer surface of the support ring, which is used to limit and block the lubrication bladder.

[0009] Preferably, the outer surface of the support ring is fixedly connected with multiple fixed protrusions to increase the friction force when the gripper holds the spearhead body.

[0010] Preferably, the fixing protrusion is made of flexible rubber.

[0011] Preferably, the lubrication bladder is made of flexible plastic material and is filled with lubricating fluid, which causes the lubrication bladder to be in an expanded state.

[0012] Preferably, the lubricating bladder is composed of at least two arc-shaped bladders, and the at least two arc-shaped bladders form a ring.

[0013] Preferably, the protective component includes a sliding ring, which is slidably sleeved on the outer surface of the spearhead body and located above the mounting ring. At least two guide posts are fixedly connected to the outer surface of the mounting ring, and the guide posts are slidably connected to the outer surface of the mounting ring. A return spring is sleeved on the outer surface of the guide posts, and the two ends of the return spring are fixedly connected to the mounting ring and the sliding ring, respectively. A support rod is fixedly connected to the outer surface of the sliding ring, and a protective sleeve is fixedly connected to the side of the support rod away from the sliding ring. A limit stop ring is fixedly sleeved on the outer surface of the protective sleeve.

[0014] Preferably, the protective sleeve is configured as a semi-conical shape, adapted to the conical head at the top of the spearhead body, and is used to extend the conical surface of the conical head at the top of the spearhead body.

[0015] Preferably, the top plane of the limiting ring is on the same horizontal line as the bottom plane of the top conical head of the spearhead body.

[0016] Preferably, the top of the limiting ring is fixedly connected with multiple fixing protrusions, and the fixing protrusions are made of flexible rubber.

[0017] Compared with the prior art, the present invention provides a sampling and preservation device based on coal mine exploration, which has the following beneficial effects:

[0018] 1. This invention, by setting up a protective mechanism, reduces the friction between the foreign object and the spearhead body and the grippers when a high-hardness foreign object enters the clamping area of ​​the spearhead body. This is achieved through the cooperation of the support ring and the lubricating bladder, combined with the pushing force of the grippers and the lubricating bladder. This not only reduces wear on the spearhead body and the grippers but also allows smooth foreign objects to slide out of the clamping area. This effectively avoids the problem of greater wear on the spearhead body and the grippers caused by harder foreign objects and the problem of disengagement when removing the inner tube. It overcomes the shortcomings of the prior art and improves the service life of the inner tube and the safety during removal.

[0019] 2. By setting up protective components, this invention protects the gripping part of the spearhead body during the sampling process through the cooperation of the conical surface of the protective sleeve and the conical surface of the spearhead body, effectively reducing the entry of impurities. After sampling is completed, the gripper automatically enters the gripping area through the cooperation of the limiting ring, sliding ring, return spring and guide post, and the limiting ring and the spearhead body reverse to create a gripping effect on the gripper, which improves the fixing effect of the gripper and the gripping effect of the external retrieval device on the spearhead body. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the mounting ring of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the support ring of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the internal structure of the protective sleeve of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the top of the protective sleeve of the present invention;

[0025] Figure 6 This is a structural diagram of the spearhead body of the present invention when it is removed.

[0026] In the picture:

[0027] 100. Outer tube; 101. Inner tube; 102. Spearhead body;

[0028] 200. Protective mechanism; 201. Mounting ring; 202. Connecting rod; 203. Support ring; 204. Lubrication bladder; 205. Limiting protrusion; 206. Fixing protrusion;

[0029] 211. Sliding ring; 212. Return spring; 213. Guide post; 214. Support rod; 215. Protective sleeve; 216. Limiting ring; 217. Fixing protrusion. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0031] Example 1

[0032] like Figures 1 to 6 As shown, this embodiment provides a sampling and preservation device based on coal mine exploration, including an outer tube 100, an inner tube 101 inside the outer tube 100, a spearhead body 102 fixedly connected to the top of the inner tube 101, and a protective mechanism 200 at the bottom of the spearhead body 102, which is used to reduce the friction between high hardness impurities and the spearhead body 102 and the grippers when the grippers are clamped to the spearhead body 102.

[0033] The protective mechanism 200 includes a mounting ring 201, which is fixedly sleeved on the outer surface of the spearhead body 102. A connecting rod 202 is fixedly connected to the outer surface of the mounting ring 201, and a support ring 203 is fixedly connected to the top of the connecting rod 202. A lubrication bladder 204 is provided in the annular groove of the support ring 203. The lubrication bladder 204 automatically ruptures when subjected to pressure, thereby reducing the coefficient of friction at the rupture area of ​​the lubrication bladder 204. The protective mechanism 200 includes a protective component for auxiliary protection of the spearhead body 102 and the lubrication bladder 204.

[0034] The spearhead body 102 includes a top conical head and a bottom cylindrical rod. When the retrieval device clamps and retrieves the spearhead body 102, the grippers are equipped with elastic elements. When the grippers move downward, they are guided and pushed by the conical surface of the top conical head of the spearhead body 102. The grippers automatically open, and the elastic elements stretch, allowing the grippers to move to the bottom of the top conical head of the spearhead body 102. At this time, the conical head offsets the compression of the grippers, creating a clamping space between the grippers. Then, under the rebound of the elastic elements, the grippers return to their original position, thereby clamping the spearhead body 102 (this is the prior art).

[0035] Furthermore, several limiting protrusions 205 are fixedly connected inside the annular groove of the support ring 203. The limiting protrusions 205 are arc-shaped protrusions, and the arc-shaped outer surface of the limiting protrusions 205 is on the same plane as the outer surface of the support ring 203. They are used to limit and block the lubrication bladder 204, improve the fixing effect of the lubrication bladder 204 in the annular groove of the support ring 203, and facilitate the subsequent installation of the lubrication bladder 204.

[0036] Furthermore, multiple fixing protrusions 206 are fixedly connected to the outer surface of the support ring 203 to increase the friction force of the gripper on the spearhead body 102 and improve the gripping effect.

[0037] Furthermore, the fixing protrusion 206 is made of flexible rubber to avoid wear on the grippers.

[0038] Furthermore, the lubrication bladder 204 is made of flexible plastic material and is filled with lubricating fluid. The lubricating fluid causes the lubrication bladder 204 to be in an expanded state, giving it a certain degree of toughness. When the impurities are not hard enough, they cannot break the lubrication bladder 204. At the same time, when the lubrication bladder 204 breaks, because it is in an expanded state, the lubricating fluid can be sprayed out from the lubrication bladder 204, improving the speed and range of lubrication of impurities and foreign objects.

[0039] Furthermore, the lubrication bladder 204 is composed of at least two arc-shaped bladders, which form a ring shape. This not only facilitates installation, but also allows for easy replacement of the broken lubrication bladder 204 if one of them breaks, while the others can continue to be used, thus saving costs.

[0040] Further embodiments are described in reference to... Figures 4 to 5 The protective component includes a sliding ring 211, which is slidably sleeved on the outer surface of the spearhead body 102 and located above the mounting ring 201. At least two guide posts 213 are fixedly connected to the outer surface of the mounting ring 201. The guide posts 213 are slidably connected to the outer surface of the mounting ring 201. A return spring 212 is sleeved on the outer surface of the guide posts 213. The two ends of the return spring 212 are fixedly connected to the mounting ring 201 and the sliding ring 211, respectively. A support rod 214 is fixedly connected to the outer surface of the sliding ring 211. A protective sleeve 215 is fixedly connected to the side of the support rod 214 away from the sliding ring 211. A limit stop ring 216 is fixedly sleeved on the outer surface of the protective sleeve 215.

[0041] Furthermore, the protective sleeve 215 is set as a semi-conical shape, which is adapted to the top conical head of the spearhead body 102, and is used to extend the conical surface of the top conical head of the spearhead body 102, thereby protecting the clamping area. The top plane of the limiting ring 216 and the bottom plane of the top conical head of the spearhead body 102 are on the same horizontal line, which makes it easy for the gripper to push the limiting ring 216 downward and enter the clamping area.

[0042] Furthermore, the top of the limiting ring 216 is fixedly connected with multiple fixing protrusions 217. The fixing protrusions 217 are made of flexible rubber, which not only improves the clamping effect but also effectively protects the gripper and reduces wear on the bottom of the gripper.

[0043] The implementation of this embodiment effectively avoids the problem of excessive wear on the spearhead body 102 and the grippers caused by hard foreign objects, as well as the problem of disengagement when removing the inner tube 101. It overcomes the shortcomings of the prior art, improves the service life of the inner tube 101 and the safety during removal, and at the same time improves the gripping effect of the external retrieval device on the spearhead body 102.

[0044] Example 2

[0045] like Figures 1 to 6 As shown, this embodiment provides a sampling and preservation device based on coal mine exploration, including an outer tube 100, an inner tube 101 inside the outer tube 100, a spearhead body 102 fixedly connected to the top of the inner tube 101, and a protective mechanism 200 at the bottom of the spearhead body 102, which is used to reduce the friction between high hardness impurities and the spearhead body 102 and the grippers when the grippers are clamped to the spearhead body 102.

[0046] The protective mechanism 200 includes a mounting ring 201, which is fixedly sleeved on the outer surface of the spearhead body 102. A connecting rod 202 is fixedly connected to the outer surface of the mounting ring 201, and a support ring 203 is fixedly connected to the top of the connecting rod 202. A lubrication bladder 204 is provided in the annular groove of the support ring 203. The lubrication bladder 204 automatically ruptures when subjected to pressure, reducing the friction coefficient at the rupture area of ​​the lubrication bladder 204. The mounting ring 201, the support ring 203, and the lubrication bladder 204 are all composed of two semi-circular arcs and are installed on the spearhead body 102 by bolts.

[0047] In this embodiment, if either the spearhead body 102 or the protective mechanism 200 is damaged, the damaged party can be disassembled for easy replacement.

[0048] The working principle of all the content in the above embodiments is as follows:

[0049] In the initial state, the lubrication bladder 204 is located in the annular groove of the support ring 203. By limiting the bulge 205, the lubrication bladder 204 and the support ring 203 are fixed in a fixed state without being subjected to external force. The return spring 212 is in a normal state. When the protective sleeve 215 is not sliding, the conical surface of the protective sleeve 215 is an extension of the conical surface of the spearhead body 102. The limiting ring 216 is located outside the contact surface between the spearhead body 102 and the protective sleeve 215. The top plane of the limiting ring 216 is on the same horizontal line as the bottom plane of the top conical head of the spearhead body 102.

[0050] The following describes the working principle and beneficial effects of the protective mechanism 200:

[0051] During normal use, when the retrieval jaws move downwards, the conical surface of the top conical head of the spearhead body 102 pushes open under the guide. The jaws move to the limiting ring 216. Due to the obstruction of the limiting ring 216, the bottom of the jaws pushes the limiting ring 216 downwards. This pushing force causes the limiting ring 216 to move the protective sleeve 215 downwards simultaneously. Under the action of the support rod 214, the sliding ring 211 also slides downwards, the return spring 212 slides downwards, and the guide post 213 presses down. The gripper retracts until the distance between the limiting ring 216 and the bottom of the cone-shaped head of the spearhead body 102 is equal to the height of the gripper. At this point, the gripper stops pushing the limiting ring 216 downward and automatically rebounds through its elastic element, clamping the cone-shaped head of the spearhead body 102. Under the elastic force of the return spring 212, the protective sleeve 215 and the limiting ring 216 apply an upward pushing force to the bottom of the gripper. With the cooperation of the cone-shaped head of the spearhead body 102, the spearhead body 102 and the limiting ring 216 clamp the gripper.

[0052] By setting up protective components, during the sampling process, the cone-shaped surface of the protective sleeve 215 and the cone-shaped surface of the spearhead body 102 cooperate to protect the clamping part of the spearhead body 102, effectively reducing the entry of impurities. After sampling is completed, the clamping claw automatically enters the clamping area through the cooperation of the limiting ring 216, the sliding ring 211, the return spring 212 and the guide post 213, and the limiting ring 216 and the spearhead body 102 reverse to clamp the claw, improving the fixing effect of the claw during clamping and improving the clamping effect of the external retrieval device on the spearhead body 102.

[0053] Furthermore, by setting the fixed protrusion 217, when the limiting ring 216 and the spearhead body 102 clamp the gripper, the limiting ring 216 can improve the clamping effect of the gripper. At the same time, the flexible rubber setting of the fixed protrusion 217 not only improves the clamping effect, but also effectively protects the gripper and reduces the wear on the bottom of the gripper.

[0054] Furthermore, when a relatively hard mineral enters the top of the inner tube 101 through the gap between the outer tube 100 and the inner tube 101, and adheres to the bottom of the conical head of the spearhead body 102, the external retrieval device's grippers slide down and clamp the top conical head of the spearhead body 102. If there are still high-hardness foreign objects between the grippers and the spearhead body 102, the foreign objects are pushed by the grippers towards the lubrication bladder 204, causing the rough-surfaced foreign objects to contact the lubrication bladder 204. Under the pushing force of the grippers, the lubrication bladder 204... 04. After the lubricating bladder 204 ruptures, the lubricating fluid inside the lubricating bladder 204 will be ejected from the rupture point, thereby acting on the foreign object and coating its surface with lubricating fluid. The lubricating fluid forms a lubricating film on the surface of the foreign object, reducing the friction between the foreign object and the spearhead body 102 and the gripper. When the gripper applies pressure again, the foreign object will slide to other areas due to its smooth surface, thus avoiding obstruction of the gripping area by the foreign object and ensuring the gripping effect between the gripper and the spearhead body 102.

[0055] It should be noted that when the gripper is gripping normally, because one side of the gripper is relatively smooth, the gripper will not contact the lubrication bladder 204, but will contact the outer surface of the support ring 203. At the same time, the setting of the fixing protrusion 206 increases the friction between the gripper and the outer surface of the support ring 203. The fixing protrusion 206 is made of rubber, which is relatively soft and reduces wear on the gripper. Also, when the hardness of the foreign object does not exceed the set limit, the foreign object will be crushed by the gripping force before it can rupture the lubrication bladder 204.

[0056] By setting up the protective mechanism 200, when a high-hardness foreign object enters the clamping area of ​​the spearhead body 102, the cooperation of the support ring 203 and the lubrication bladder 204 ensures that the lubrication bladder 204 will not be triggered to break during normal clamping by the grippers. Furthermore, when there is a high-hardness foreign object, the friction between the foreign object and the spearhead body 102 and the grippers is reduced by the combination of the gripper's thrust and the lubrication bladder 204, thereby reducing wear on the spearhead body 102 and the grippers. It also allows smooth foreign objects to slide out of the clamping area, effectively avoiding the problem of greater wear on the spearhead body 102 and the grippers caused by harder foreign objects and the problem of disengagement when removing the inner tube 101. This overcomes the shortcomings of the prior art and improves the service life of the inner tube 101 and the safety during removal.

[0057] Furthermore, the limiting protrusion 205 can be used to fix the lubrication bladder 204. At the same time, when the lubrication bladder 204 is broken, the new arc-shaped limiting protrusion 205 can be re-clamped into the annular groove of the support ring 203. When the new lubrication bladder 204 is installed, multiple arc-shaped lubrication bladders 204 are reassembled into a ring.

[0058] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A sampling and preservation device for coal mine exploration, comprising an outer tube (100), wherein an inner tube (101) is disposed inside the outer tube (100), and a spearhead body (102) is fixedly connected to the top of the inner tube (101), characterized in that, The bottom of the spearhead body (102) is provided with a protective mechanism (200) to reduce the friction between the high-hardness impurities and the spearhead body (102) and the gripper when the gripper clamps the spearhead body (102); The protective mechanism (200) includes a mounting ring (201), which is fixedly sleeved on the outer surface of the spearhead body (102). A connecting rod (202) is fixedly connected to the outer surface of the mounting ring (201). A support ring (203) is fixedly connected to the top of the connecting rod (202). A lubricating bladder (204) is provided in the annular groove of the support ring (203). The lubricating bladder (204) automatically ruptures when subjected to pressure, thereby reducing the friction coefficient at the rupture area of ​​the lubricating bladder (204). The protective mechanism (200) includes a protective component for auxiliary protection of the spearhead body (102) and the lubricating bladder (204).

2. The sampling and preservation device based on coal mine exploration according to claim 1, characterized in that: The support ring (203) has several limiting protrusions (205) fixedly connected in the annular groove. The limiting protrusions (205) are arranged in an arc shape. The arc-shaped outer surface of the limiting protrusions (205) is located on the same plane as the outer surface of the support ring (203) and is used to limit and block the lubrication bladder (204).

3. The sampling and preservation device based on coal mine exploration according to claim 1, characterized in that: The outer surface of the support ring (203) is fixedly connected with a plurality of fixed protrusions (206) to increase the friction force of the gripper when clamping the spearhead body (102).

4. A sampling and preservation device based on coal mine exploration according to claim 3, characterized in that: The fixing protrusion (206) is made of flexible rubber.

5. A sampling and preservation device based on coal mine exploration according to claim 1, characterized in that: The lubrication bladder (204) is made of flexible plastic material and is filled with lubricating fluid. The lubricating fluid fills the lubrication bladder (204) so ​​that it is in an expanded state.

6. A sampling and preservation device based on coal mine exploration according to claim 1, characterized in that: The lubrication bladder (204) is composed of at least two arc-shaped bladders, and the at least two arc-shaped bladders form a ring.

7. A sampling and preservation device based on coal mine exploration according to claim 1, characterized in that: The protective component includes a sliding ring (211), which is slidably sleeved on the outer surface of the spearhead body (102) and located above the mounting ring (201). At least two guide posts (213) are fixedly connected to the outer surface of the mounting ring (201). The guide posts (213) are slidably connected to the outer surface of the mounting ring (201). A return spring (212) is sleeved on the outer surface of the guide posts (213). The two ends of the return spring (212) are fixedly connected to the mounting ring (201) and the sliding ring (211) respectively. A support rod (214) is fixedly connected to the outer surface of the sliding ring (211). A protective sleeve (215) is fixedly connected to the side of the support rod (214) away from the sliding ring (211). A limit stop ring (216) is fixedly sleeved on the outer surface of the protective sleeve (215).

8. A sampling and preservation device based on coal mine exploration according to claim 7, characterized in that: The protective sleeve (215) is set in a semi-conical shape and is adapted to the top conical head of the spearhead body (102) to extend the conical surface of the top conical head of the spearhead body (102).

9. A sampling and preservation device based on coal mine exploration according to claim 7, characterized in that: The top plane of the limiting ring (216) and the bottom plane of the top conical head of the spearhead body (102) are on the same horizontal line.

10. A sampling and preservation device based on coal mine exploration according to claim 7, characterized in that: The top of the limiting ring (216) is fixedly connected with a plurality of fixed protrusions (217), and the fixed protrusions (217) are made of flexible rubber material.

Images