A rock and soil impact sampling device

Abstract

This utility model discloses a rock and soil impact sampling device in the field of geological survey equipment, comprising: an impact component connected to a drilling rig tower via a hoisting rope; a guide tube with an open top and a closed bottom, and the guide tube is slidably connected to the lower part of the impact component, with exhaust structure between the guide tube and the impact component to achieve exhaust; and a sampling tube with an open bottom and a closed top, the top of the sampling tube being detachably connected to the bottom of the guide tube, and a discharge structure provided at the upper part of the sampling tube. The beneficial effects of this utility model are: by opening a discharge hole at the top of the sampling tube, excess soil sample inside the sampling tube can be discharged, thereby enabling sampling of deep soil without increasing the length of the sampling tube. The structure is simple and easy to manufacture.

Description

Technical Field

[0001] This utility model relates to the field of geological surveying devices, specifically to a rock and soil impact sampling device. Background Technology

[0002] Impactors are mainly used for undisturbed sampling in geotechnical engineering drilling rigs. Existing impactors include... Figure 5 As shown, it mainly consists of four parts: the connecting lifting ring, the impactor counterweight, the guide pipe, and the connecting soil sampler connector. The impactor is raised to a certain height by the drilling rig tower. Through the weight of the impactor itself and the free fall motion, it hammers the soil sampler and the connection between the impactor and the soil sampler, causing the soil sampler to move underground.

[0003] The existing impactor has its vent hole located on the pipe wall to allow the impactor's counterweight to fall smoothly into the pipe and expel internal gas. However, when sampling deeper soil and rock layers, the sampler is slowly driven down from the working plane. Since the sampler's volume is limited, it is very likely that the sampler will fill up with soil samples during the drilling process. By the time the sampler reaches the required soil layer, it will be full and unable to complete the required soil sampling. If deeper soil layers are to be sampled, the length of the sampler must be extended, which increases the overall height of the equipment and makes installation and use difficult.

[0004] Therefore, we propose a rock and soil impact sampling device. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a soil and rock impact sampling device.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A soil and rock impact sampling device includes: an impact component connected to a drilling rig tower via a hoisting rope, which is lifted by the drilling rig tower and then falls freely to form an impact; a guide tube with an open top and a closed bottom, and the guide tube is slidably connected to the lower part of the impact component, and the guide tube and the impact component are vented through an exhaust structure; and a sampling tube with an open bottom and a closed top, the top of the sampling tube being detachably connected to the bottom of the guide tube, and the upper part of the sampling tube having a discharge structure for discharging the soil sample accumulated on the upper part of the sampling tube.

[0007] By setting a discharge structure at the top of the sampling tube, excess soil sample can be discharged from the top as the sampling tube penetrates the soil, ensuring that soil samples can always be obtained from the bottom of the sampling tube. This allows for sampling of deeper soil layers without increasing the depth of the sampling tube. Furthermore, the structure is simple, easy to use, and inexpensive.

[0008] Further defining the impact assembly, it includes an impact rod and an insertion rod. The outer diameter of the insertion rod is smaller than that of the impact rod, and the outer diameter of the insertion rod is in clearance fit with the inner diameter of the conduit. The outer diameter of the impact rod is the same as that of the conduit. The insertion rod is fixedly connected to the bottom of the impact rod, and a lifting ring is fixedly provided at the top of the impact rod. By setting the outer diameter of the impact rod to be the same as that of the conduit, the insertion rod is inserted into the conduit. In this way, during the free fall of the impact assembly, the impact rod will collide with the conduit, limiting the insertion depth of the insertion rod and completing the impact.

[0009] Furthermore, the venting structure includes several venting grooves, all of which are opened along the axial direction of the insertion rod and distributed circumferentially on the periphery of the insertion rod. This venting structure is designed in this way to prevent the surrounding soil from entering the duct when the guide tube also extends into the soil layer, thus avoiding the impact of the insertion rod falling and affecting the impact force. Only when the guide tube is completely submerged in the soil will the soil enter the guide tube along the venting grooves, which greatly extends the effective sampling depth.

[0010] Further specified, the top of the sampling tube is provided with an installation sleeve, and the bottom of the conduit is provided with an installation post corresponding to the installation sleeve. The cross-section of the inner cylinder of the installation sleeve and the cross-section of the installation post are both rectangular. The outer diameter of the installation post and the inner diameter of the installation sleeve are clearance-fitted. Through pin holes are provided on the installation sleeve and the installation post along the radial direction of the installation sleeve. The installation sleeve and the installation post are fixed by a pin passing through the pin hole. By using the installation sleeve and the installation post, and fixing the installation sleeve and the installation post by the pin, the structure is stable. The rectangular cross-section of the installation sleeve and the installation post facilitates installation and positioning.

[0011] Further defining the discharge structure, the discharge hole is located on the top end face of the sampling tube and is offset from the installation sleeve. By opening the discharge hole on the end face of the sampling tube, the surrounding soil of the sampling tube is prevented from obstructing the discharge of soil samples from inside the sampling tube, making the discharge of soil samples from inside the sampling tube smoother.

[0012] Furthermore, the inner wall of the bottom opening of the sampling tube is offset outward to form an arc-shaped surface resembling a trumpet; this design of the bottom opening of the sampling tube facilitates soil sampling and reduces the insertion resistance of the sampling tube.

[0013] The beneficial effects of this utility model are as follows: by opening a discharge hole at the top of the sampling tube, excess soil sample inside the sampling tube can be discharged, thus enabling the sampling tube to sample deep soil without increasing its length. The structure is simple and easy to manufacture. Attached Figure Description

[0014] Figure 1 This is a simplified structural diagram of the present invention in its separated state; Figure 2 This is a schematic diagram of the cross-section of the insertion rod; Figure 3 This is a top view of the sampling cylinder; Figure 4 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 5 This is a simplified structural diagram of the existing technology.

[0015] The symbols for each component are as follows: Impact assembly 1, impact rod 11, insertion rod 12, lifting ring 13, guide tube 2, mounting column 21, exhaust structure 3, exhaust groove 31, sampling cylinder 4, discharge structure 41, mounting sleeve 42. Detailed Implementation

[0016] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0017] Example: like Figures 1-4As shown, a rock and soil impact sampling device includes an impact assembly 1, a guide tube 2, an exhaust structure 3, and a sampling cylinder 4. The impact assembly 1 is connected to the drilling rig tower via a hoisting rope, and is lifted by the drilling rig tower and then falls freely to form an impact. The impact assembly 1 includes an impact rod 11 and an insertion rod 12. The insertion rod 12 is fixedly connected to the bottom of the impact rod 11, and a lifting ring 13 for connecting the hoisting rope is fixedly provided at the top of the impact rod 11. The guide tube 2 is open at the top and closed at the bottom. The outer diameter of the insertion rod 12 is smaller than the outer diameter of the impact rod 11, and the outer diameter of the insertion rod 12 and the inner diameter of the guide tube 2 are in clearance fit. The outer diameter of the impact rod 11 and the outer diameter of the guide tube 2 are the same. Exhaust is achieved between the guide tube 2 and the impact assembly 1 through the exhaust structure 3. The exhaust structure 3 includes several exhaust grooves 31, which are all opened along the axial direction of the insertion rod 12 and distributed circumferentially around the insertion rod 12. On the circumference of rod 12; the bottom of sampling cylinder 4 is open and the top is closed. The inner wall of the bottom opening of sampling cylinder 4 is offset outward to form an arc-shaped surface in the shape of a trumpet. A mounting sleeve 42 is provided at the top of sampling cylinder 4. A mounting post 21 is provided at the bottom of the guide tube 2 corresponding to the mounting sleeve 42. The cross-section of the inner cylinder of mounting sleeve 42 and the cross-section of mounting post 21 are both rectangular. The outer diameter of mounting post 21 and the inner diameter of mounting sleeve 42 are clearance-fitted. A through pin hole is provided on mounting sleeve 42 and mounting post 21 along the radial direction of mounting sleeve 42. Mounting sleeve 42 and mounting post 21 are fixed by a pin passing through the pin hole. A discharge structure 41 is provided at the top of sampling cylinder 4 to discharge the soil sample accumulated at the top of sampling cylinder 4. The discharge structure 41 includes a discharge hole, which is opened on the top end face of sampling cylinder 4 and is offset from mounting sleeve 42.

[0018] By setting a discharge structure 41 at the top of the sampling cylinder 4, excess soil sample can be discharged from the top as the sampling cylinder 4 penetrates deeper into the soil, ensuring that soil samples can always be obtained from the bottom of the sampling cylinder 4. This allows for sampling of deeper soil layers without increasing the depth of the sampling cylinder 4, and the structure is simple, easy to use, and inexpensive. By setting the outer diameter of the impact rod 11 to be the same as the outer diameter of the guide tube 2, and inserting the insertion rod 12 into the guide tube 2, the impact rod 11 will collide with the guide tube 2 during the free fall of the impact assembly 1, limiting the insertion depth of the insertion rod 12 and completing the impact. This arrangement of the venting structure 3 prevents surrounding soil from entering the guide tube 2 and interfering with the insertion when the guide tube 2 also extends into the soil layer. The falling of the insertion rod 12 has an impact, which in turn affects the impact force. Only when the guide tube 2 is completely submerged in the soil will the soil enter the guide tube 2 along the venting groove 31, greatly extending the effective sampling depth. By installing the sleeve 42 and the mounting column 21, and fixing the sleeve 42 and the mounting column 21 with a pin, the structure is stable. The cross-section of the sleeve 42 and the mounting column 21 are both set to be rectangular, which facilitates installation and positioning. The discharge hole is opened on the end face of the sampling tube 4, which avoids the soil around the sampling tube 4 from obstructing the discharge of the soil sample inside the sampling tube 4, making the discharge of the soil sample inside the sampling tube 4 smoother. This setting of the bottom opening of the sampling tube 4 facilitates the sampling of soil samples and reduces the insertion resistance of the sampling tube.

Claims

1. A geotechnical impact sampling device, characterized in that, include: The impact component (1) is connected to the drilling rig tower via a hoisting rope, and is lifted by the drilling rig tower and then falls freely to form an impact. The conduit (2) is open at the top and closed at the bottom, and the conduit (2) is slidably connected to the lower part of the impact assembly (1). The conduit (2) and the impact assembly (1) are vented through the venting structure (3). The sampling tube (4) is open at the bottom and closed at the top. The top of the sampling tube (4) is detachably connected to the bottom of the conduit (2). The upper part of the sampling tube (4) is provided with a discharge structure (41) to discharge the soil sample accumulated on the upper part of the sampling tube (4).

2. The geotechnical impact sampling device of claim 1, wherein, The impact assembly (1) includes an impact rod (11) and an insertion rod (12). The outer diameter of the insertion rod (12) is smaller than that of the impact rod (11), and the outer diameter of the insertion rod (12) is clearance-fitted with the inner diameter of the conduit (2). The outer diameter of the impact rod (11) is the same as that of the conduit (2). The insertion rod (12) is fixedly connected to the bottom of the impact rod (11), and a lifting ring (13) is fixedly provided at the top of the impact rod (11).

3. A geotechnical impact sampling device according to claim 2, wherein, The exhaust structure (3) includes a plurality of exhaust grooves (31), which are opened along the axial direction of the insertion rod (12) and distributed circumferentially on the circumferential surface of the insertion rod (12).

4. The geotechnical impact sampling device of claim 3, wherein, The top end of the sampling tube (4) is provided with an installation sleeve (42), and the bottom end of the guide tube (2) is provided with an installation post (21) corresponding to the installation sleeve (42). The cross-section of the inner cylinder of the installation sleeve (42) and the cross-section of the installation post (21) are both rectangular. The outer diameter of the installation post (21) and the inner diameter of the installation sleeve (42) are clearance-fitted. The installation sleeve (42) and the installation post (21) are provided with through pin holes along the radial direction of the installation sleeve (42). The installation sleeve (42) and the installation post (21) are fixed by a pin passing through the pin hole.

5. The geotechnical impact sampling device of claim 4, wherein, The discharge structure (41) includes a discharge hole, which is opened on the top end face of the sampling cylinder (4) and is offset from the mounting sleeve (42).

6. The geotechnical impact sampling device of claim 5, wherein, The inner wall of the bottom opening of the sampling tube (4) is offset outward to form an arc-shaped surface in the shape of a trumpet.

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