A portable gravity hammer sampling device

Abstract

This utility model discloses a portable gravity hammer sampling device, including a drill bit, an extension rod, and an impact component. The impact component includes a coaxially arranged limiting and positioning rod, an inner sliding rod, an outer sliding rod, and a weight-adding tube. The limiting and positioning rod is fitted inside the inner sliding rod via a clamp, with a fixed limiting clip at its bottom and a limiting element at its other end. A force-bearing seat is provided on the inner sliding rod, and its bottom end is connected to the drill bit. The outer sliding rod is slidably mounted on the inner sliding rod, and its top end is connected to the extension rod. When the outer sliding rod moves downward, the gravity hammer on it impacts the force-bearing seat. The upward movement distance of the outer sliding rod is limited by the limiting element. The weight-adding tube is fitted onto the outer sliding rod via upper and lower sealing bases. It further includes a hammer lifting cable and a drill lifting cable. One end of the drill lifting cable is fixed to the limiting and positioning rod, and one end of the hammer lifting cable is fixed to a top fixing seat connected to the extension rod. The device described in this utility model is easy to carry, has high working efficiency, and can achieve progressive, continuous, and complete sampling.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, specifically to a portable gravity hammer sampling device. Background Technology

[0002] In the geological exploration of rare earth deposits, it is necessary to sample underground soil layers or ore layers. Traditional Luoyang shovel exploration methods have certain limitations, such as the inability to penetrate thick ore bodies, thus failing to achieve the sampling objective. To achieve the sampling objective and improve sampling accuracy, invention patent CN104990759A discloses an improved manual percussion sampling drill based on the Luoyang shovel. It mainly consists of a drill bit, a core anti-drop device, a drill rod, a handle, and a control lever. The drill bit comprises a cutting edge, a sampling cylinder, a welded drill bit rib, and a guide joint. This invention is applicable to the main exploration methods targeting fully weathered layers, especially for the exploration and evaluation of weathered crust ion adsorption type rare earth deposits. However, this invention relies entirely on manual percussion drilling for sample extraction, resulting in low work efficiency. Furthermore, as the borehole deepens, the control lever needs to be continuously extended, making the drill increasingly heavy. In actual fieldwork, the process of manually pulling out the drill bit after each impact drill bit penetration is extremely strenuous and requires repeated attempts to fully penetrate the soil. Then, the operator must use their arm strength to pull the control lever upwards to bring the drill bit to the borehole opening and retrieve the sample. This entire process is very physically demanding, requiring two professionals to operate simultaneously, and demands a high level of physical strength, especially arm strength and endurance. Furthermore, the repeated pulling of the drill bit stirs and mixes the weathered soil, disrupting the original soil structure and making it impossible to obtain a complete weathered rock core sample.

[0003] Additionally, utility model patent CN219710259U discloses a visual deep foundation sampling device, including a base opening, a support, and a standard penetration tester (SPT). A drill bit is threadedly connected to the end of the SPT, and the drill bit is hollow. A vertical rod is threadedly connected to the end of the SPT away from the drill bit. A probe plate is fixedly installed on the vertical rod, and a gravity hammer is slidably mounted on the vertical rod. A lifting component for driving the gravity hammer to move vertically up and down is provided on the support. A limiter is provided on the support. The lifting component includes a lifting motor fixedly installed on the top side of the support and a rotating rod rotatably mounted on the support. Two sets of winding rollers and suspension lines are symmetrically arranged on the rotating rod. This visual deep foundation sampling device improves the stability of the SPT during descent by setting a limiter and two sets of symmetrical winding rollers and suspension lines, resulting in high working efficiency. However, this utility model is neither convenient to carry nor applicable in the field without electricity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a portable gravity hammer sampling device. This device is easy to carry, and the design of the weight-adding tube makes the device more efficient and can achieve progressive continuous complete sampling.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A portable gravity hammer sampling device includes a drill bit, an extension rod, and an impact component, wherein:

[0007] The impact component includes a limiting positioning rod, an inner sliding rod, an outer sliding rod, and a weight-adding tube arranged coaxially from the inside to the outside. The limiting positioning rod is fitted inside the inner sliding rod via a clamp, and a fixed limiting clamp is provided at the bottom end of the limiting positioning rod. Its other end passes through the clamp and the connector at the top of the outer sliding rod, having a protruding portion with a limiting element at the protruding portion. A force-bearing seat is provided on the inner sliding rod, and its bottom end is connected to the drill bit. The outer sliding rod is slidably mounted on the inner sliding rod, and a connector is provided at its top end. A gravity hammer is provided on the outer sliding rod. When the outer sliding rod moves downward, the gravity hammer strikes the force-bearing seat on the inner sliding rod. The upward movement of the outer sliding rod is limited by the limiting element on the limiting positioning rod. The weight-adding tube is fitted onto the outer sliding rod, and its upper and lower ends are sealed by an upper sealing base and a lower sealing base, respectively.

[0008] The extension rod has one end connected to the connector at the top of the outer slide rod, and the other end is provided with a top fixing seat.

[0009] The weight-adding tube in the device described in this utility model is used to fill the device with heavy objects (such as soil or sand that can be taken anywhere in the field) when the device is working, to provide a power source for the gravity hammer and realize progressive continuous sampling; during carrying and transportation, the empty weight-adding tube can be used to store the extension rod and other small parts, making the device easier to carry.

[0010] In the device described in this utility model, a conventional drill rod is used as the extension rod.

[0011] When the extension rod is not long enough to complete deeper sampling, in order to complete sampling of deeper strata, the device of this utility model preferably includes two cables: a hammer lifting cable and a drill lifting cable. One end of the drill lifting cable is fixed to the extended part of the limiting positioning rod, and one end of the hammer lifting cable is fixed to the top fixing base. The hammer lifting cable provides traction and power for the entire impact component, and is used to control the impact height and force; the angle of the drill lifting cable is used to fine-tune the drill bit direction, and it also provides a safety guarantee to prevent the device from falling due to accidental breakage of the hammer lifting cable; the two cables work together to fine-tune the drill bit direction and the drill bit's soil penetration depth.

[0012] Furthermore, a gasket is also provided between the lower sealing base and the gravity hammer.

[0013] Furthermore, the number of extension rods can be one or more. When there are two or more extension rods, they are connected to each other using a movable connection, such as a threaded joint. Even further, when there are four or more extension rods, while retaining one extension rod on the device, the remaining extension rods can be assembled with a through-type platform to form a tripod. A set of pulleys is then installed, and the other ends of the hammer lifting cable and drill lifting cable are respectively wound around the pulleys. The drill bit is then lifted through the pulleys for impact sampling, achieving the purpose of saving time and effort.

[0014] Furthermore, the limiting component is an adjustable limiting clip.

[0015] Furthermore, one end of the drilling cable passes through the top fixing seat and the extension rod and is then fixed to the top of the limiting positioning rod.

[0016] Compared with the prior art, the features of this utility model are as follows:

[0017] 1. The design of the weight-adding tube serves two purposes. Firstly, it allows the extension rod to be placed inside, providing storage and easy portability. More importantly, by using temporary backfill soil in the field as the power source for the gravity hammer, the drill bit is repeatedly pulled up to a certain height and then released, providing pulsed gravity impacts. This rapid and continuous hammering provides the drill bit with continuous forward momentum. After multiple accumulations, the soil sample inside the drill bit can maintain its original weathered soil structure, achieving progressive continuous sampling. When the drill bit has swallowed a certain amount of soil, it is lifted to the hole entrance and the complete soil sample is extracted and preserved. This allows for the extraction of complete weathered rock core samples, enabling continuous and complete sampling of weathered strata.

[0018] 2. Furthermore, a dual-cable design of hammer lifting cable and drill lifting cable is adopted. The hammer lifting cable provides traction and power for the entire impact component and is used to control the impact height and force. The drill bit direction is finely adjusted by pulling the angle of the drill lifting cable, and it also provides a safety guarantee to prevent the device from falling off in case of accidental breakage of the hammer lifting cable. The combination of the two cables can finely adjust the direction of the drill bit and the depth of soil penetration of the drill bit.

[0019] 3. The device described in this utility model can perform field sampling in the absence of power, and is suitable for sampling in the exploration of the entire weathered layer in granite areas, especially for the detection and sampling of rare earth minerals of weathered crust ion adsorption type. By lengthening the cable, changing different types of drill bits and changing the weight of the gravity hammer, it is possible to detect and sample in trenches, caves and deep pits of unknown depth.

[0020] 4. Furthermore, when there are four or more extension rods, the extra extension rods can be disassembled and assembled with a through-type platform to form a tripod. A pulley system can be installed, and the cables can be wound around it. The weight of the user pulls different cables to achieve the impact function. Each time, the impact drill is lifted through the pulley system to collect samples, saving time and effort. Even further, the pulley system can be designed as a battery-powered, electrically synchronized system to assist manual control, further improving work efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one embodiment of the sampling device described in this utility model.

[0022] Figure 2 This is a schematic diagram of another embodiment of the sampling device described in this utility model.

[0023] The numbers on the map are:

[0024] 1. Drill bit, 2. Force bearing seat, 3. Inner slide rod, 4. Gravity hammer, 5. Washer, 6. Lower sealing base, 7. Outer slide rod, 8. Fixed limit clip, 9. Clip head, 10. Limiting and positioning rod, 11. Weighting tube, 12. Upper sealing base, 13. Connector, 14. Limiting component, 15. Drill lifting cable, 16. Extension rod, 17. Top fixing seat, 18. Hammer lifting cable, 19. Pulley, 20. Through-hole platform, 21. Tripod. Detailed Implementation

[0025] To better explain the technical solution of this utility model, the present utility model will be described in further detail below with reference to the accompanying drawings, but the embodiments of this utility model are not limited thereto.

[0026] In the following description of the technical solution, the "bottom end" of a component refers to the end of the component that is close to the ground when the device of the present invention is placed vertically; the "top end" of a component refers to the end of the component that is away from the ground when the device of the present invention is placed vertically.

[0027] See Figure 1 The portable gravity hammer sampling device of this utility model includes a hammer lifting cable 18 and a drill lifting cable 15, a drill bit 1, an extension rod 16, and an impact component. The extension rod 16 is connected to the top of the impact component, and the drill bit 1 is located at the bottom of the impact component. One end of the drill lifting cable 15 is fixed to the impact component to control the fine adjustment of the direction of the drill bit 1. One end of the hammer lifting cable 18 is fixed to the extension rod 16 to provide traction and power to the impact component, and is used to control the impact height and force.

[0028] Specifically, the impact component includes a limiting positioning rod 10, an inner sliding rod 3, an outer sliding rod 7, and a weight-adding tube 11, all coaxially arranged from the inside to the outside. The inner sliding rod 3, outer sliding rod 7, and weight-adding tube 11 are all hollow tubes. The limiting positioning rod 10 is fitted inside the inner sliding rod 3 via a clamp 9, which is located at the top of the inner sliding rod 3. The limiting positioning rod 10 can move up and down within the inner sliding rod 3. A fixing clamp 8 is provided at the bottom of the limiting positioning rod 10 to prevent it from detaching from the inner sliding rod 3 when moving upwards. The other end of the limiting positioning rod 10 passes through the clamp 9 and the connecting piece 13 at the top of the outer sliding rod 7, and has a protruding portion. A limiting member 14 is provided in this protruding portion. The outer diameter of the limiting member 14 is larger than the outer diameter of the limiting positioning rod and larger than the center hole diameter of the connecting piece 13 used to connect the outer sliding rod 7 and the extension rod 16, but smaller than the extension rod. The inner diameter is 16, therefore, the limiting member 14 can limit the movement range of the limiting positioning rod 10 when it moves downward, thereby determining the relative distance of the sliding of the inner slide rod 3 and the outer slide rod 7, that is, the maximum lifting movement distance of the gravity hammer each time; the lower middle part of the inner slide rod 3 is provided with a force-bearing seat 2, the bottom end of which is connected to the drill bit 1; the outer slide rod 7 is slidably disposed on the inner slide rod 3, and its top end is provided with a connecting member 13, which is connected to one end of the extension rod 16; a gravity hammer 4 is provided at the bottom of the outer slide rod 7. When the outer slide rod 7 moves downward, the gravity hammer 4 on it strikes the force-bearing seat 2 on the inner slide rod 3, and the upward movement of the outer slide rod 7 is limited by the limiting member 14 on the limiting positioning rod 10; the weight-adding tube 11 is fitted on the outer slide rod 7, and its upper and lower ends are sealed by the upper sealing base 12 and the lower sealing base 6, respectively.

[0029] Specifically, the bottom end of the extension rod 16 is connected to the connector 13 at the top of the outer slide rod 7, and a top fixing seat 17 is provided at its top. One end of the hammer lifting cable 18 is fixedly installed on the top fixing seat 17. One end of the drill lifting cable 15 passes through the top fixing seat 17 and the extension rod 16 and is fixed to the end of the protruding part of the limiting positioning rod 10, that is, the top of the limiting positioning rod 10.

[0030] In the device described in this utility model, the extension rod 16 is a conventional hollow drill rod, and the number of them can be one or more. Preferably, the length of each extension rod 16 is designed to be slightly less than the length of the weight-adding tube 11. When there are two or more extension rods 16, they are connected to each other by a movable connection, such as by a threaded joint. As an improved embodiment, when there are four or more extension rods 16, while retaining one extension rod 16 on the device, the remaining extension rods 16 are assembled with a through-hole platform 20 to form a tripod 21. A set of pulleys 19 is then set up, and the other ends of the hammer lifting cable 18 and the drill lifting cable 15 are respectively wound around the pulleys 19. The drill bit 1 is lifted by the pulleys 19 for impact sampling (e.g., Figure 2As shown in the figure, this achieves the goal of saving time and effort.

[0031] The device described in this utility model adopts a double-cable design of hammer lifting cable 18 and drill lifting cable 15. The hammer lifting cable 18 provides traction and lifting power to control the impact height and force of the impact component. The direction of the drill bit 1 is finely adjusted by pulling the angle of the drill lifting cable 15, and at the same time, it provides a safety guarantee to prevent the device from falling due to accidental breakage of the hammer lifting cable 18. The combination of the two cables can finely adjust the direction of the drill bit 1 and the soil-digging depth of the drill bit 1.

[0032] The weight-adding tube 11 in the device described in this utility model is used to load heavy objects (such as soil or sand that can be easily obtained in the wild) during operation. By repeatedly pulling it up to a certain height and releasing it, it provides a pulsed gravity impact to the drill bit 1, providing a power source for the gravity hammer 4. The cooperation of each component in the entire impact structure provides an impact force for the drill bit 1 to move forward, and at the same time provides a reverse backward impact force during the process of lifting and removing the drill bit 1, making it easier to pull the drill bit 1 upward from the soil. In particular, the combination with the pulley 19 can greatly save manual labor. Furthermore, the pulley 19 can be upgraded to a battery-powered electric control to further improve work efficiency.

[0033] During the carrying and transportation of the device described in this utility model, the weight-adding tube 11 serves a storage function. After disassembling each movable connecting part, the extension rod 16 and / or other small parts (such as threaded joints, etc.) are stored in the weight-adding tube 11, which greatly improves the portability of the device.

[0034] More specifically, the limiting element 14 on the limiting and positioning rod 10 can be an adjustable limiting clip, and the connecting element 13 at the top of the outer slide rod 7 can be a threaded joint. The bottom end of the inner slide rod 3 is connected to the drill bit 1 by a threaded connection. The connection between the upper sealing base 12 or the lower sealing base 6 and the weight-adding tube 11 is also by a threaded connection, while the outer slide rods 7 of the upper sealing base 12 or the lower sealing base 6 are fitted with a clearance fit or a tightening fit. The connection between the extension rod 16 and the top fixing seat 17 is by a threaded connection. The drill bit 1 can be a conventional cylindrical hollow drill bit, such as the drill bit from Gannan Drill.

[0035] Preferably, a shim 5 can be placed between the lower sealing base 6 on the outer slide rod 7 and the gravity hammer 4 to provide elastic cushioning for the soil-filled weight-adding tube 11 during impact. The shim 5 is preferably made of elastic material such as rubber.

[0036] During field exploration, after completing preparatory work (including hole location determination and simple site leveling), drilling is carried out. This drilling can be performed using existing conventional methods, or it can be performed directly using the extension rod 16 and drill bit 1 connected (threaded connection) in the device described in this utility model. After drilling, soil is filled into the weight-adding tube 11, and the position of the limiting member 14 is adjusted to limit the distance of the gravity hammer 4's descent and impact on the force seat 2 to a small amplitude. The extension rod 16 is directly lifted using arm strength to drive the gravity hammer 4 to impact. By repeatedly lifting the extension rod 16 manually, the forward momentum of the drill bit 1 is provided to achieve continuous and complete sampling. When the drill bit has swallowed a certain amount of soil, it is lifted to the hole opening and a complete soil sample is taken out. In this way, a complete weathered rock core sample can be extracted and preserved. When the length of one extension rod 16 is insufficient to complete the sampling, the number of extension rods 16 can be continuously increased to complete the sampling through manual drilling. If the length of the extension rod 16 is still insufficient to complete the sampling work after connection, leave one extension rod 16 on the device, remove the other extension rods 16, install the hammer lifting cable 18 and drill lifting cable 15, as well as the top fixing seat 17, and use arm strength to pull the cable in the device. Pulling the hammer lifting cable 18 drives the gravity hammer 4 to impact the force seat 2, providing forward power to the drill bit 1, and continuing continuous and complete sampling. Alternatively, the cable and tripod 21 (the tripod 21 is assembled from the disassembled excess extension rod 16 and the through platform 20, and further includes pulleys 19) can be assembled. By repeatedly pulling the hammer lifting cable 18 (and deciding whether to pull the drill lifting cable 15 during the process depending on the specific situation), the weight-adding tube 11 is driven to a certain height and released, providing pulse gravity impact to the drill bit 1, and achieving continuous and complete sampling of the weathered strata.

Claims

1. A portable gravity hammer sampling device, comprising a drill bit (1), an extension rod (16), and an impact component, characterized in that, The impact component includes a limiting positioning rod (10), an inner slide rod (3), an outer slide rod (7), and a weight-adding tube (11) arranged coaxially from the inside to the outside. The limiting positioning rod (10) is sleeved inside the inner slide rod (3) through a clamp (9). A fixed limiting clamp (8) is provided at the bottom end of the limiting positioning rod (10). Its other end passes through the clamp (9) and the connector (13) at the top of the outer slide rod (7) and has a protruding part. A limiting member (14) is provided on the protruding part. A force-bearing seat (2) is provided on the inner slide rod (3), and its bottom end is connected to the drill bit (1). The outer slide rod (7) is slidably mounted on the inner slide rod (3), and a connector (13) is provided at its top end. A gravity hammer (4) is provided on the outer slide rod (7). When the outer slide rod (7) moves downward, the gravity hammer (4) on it impacts the force seat (2) on the inner slide rod (3). The upward movement of the outer slide rod (7) is limited by the limiting member (14) on the limiting positioning rod (10). The weight-adding tube (11) is fitted onto the outer slide rod (7), and its upper and lower ends are sealed by the upper sealing base (12) and the lower sealing base (6) respectively. The extension rod (16) has one end connected to the connector (13) at the top of the outer slide rod (7), and the other end is provided with a top fixing seat (17).

2. The portable gravity hammer sampling device according to claim 1, characterized in that, It also includes a hammer lifting cable (18) and a drill lifting cable (15), one end of which is fixed to the protruding part of the limiting positioning rod (10), and one end of which is fixed to the top fixing seat (17).

3. The portable gravity hammer sampling device according to claim 1 or 2, characterized in that, A gasket (5) is provided between the lower sealing base (6) and the gravity hammer (4).

4. The portable gravity hammer sampling device according to claim 1 or 2, characterized in that, The number of extension rods (16) is one or more. When the number of extension rods (16) is two or more, they are connected to each other in a movable manner.

5. The portable gravity hammer sampling device according to claim 1 or 2, characterized in that, The limiting component (14) is an adjustable limiting card.

6. The portable gravity hammer sampling device according to claim 2, characterized in that, One end of the drilling cable (15) passes through the top fixing seat (17) and the extension rod (16) and is fixed to the top of the limiting positioning rod (10).

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