Loess exploratory well sampling device
By designing a cylindrical loess exploration well sampling device with a simple structure, the existing sampling methods are solved, and the rapid and accurate soil sample collection and introduction are achieved, and the sampling efficiency and data accuracy are improved.
Patent Information
- Application Number
- CN202420644185.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The existing loess well sampling methods are inefficient and have single manual operations, especially in loose areas, which are difficult to collect normally, resulting in missing samples at key geological strata, affecting the systematic evaluation of the nature of the engineering and posing safety hazards.
A cylindrical sampling device is designed, including a handle, annular blade, a hollow notch and a pushing mechanism. It has a simple structure and is easy to carry. It can be quickly inserted into the well wall for sampling and quickly ejected the soil sample through the pushing mechanism.
It improves sampling efficiency, reduces downhole operation time, reduces safety hazards, ensures the complete collection of key geological strata, and improves the accuracy of test data.
Smart Images
Figure CN222579657U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of geotechnical engineering exploration, in particular to an original soil sampling device in an exploration well in a loess area. Background Art
[0002] Loess, as a special Quaternary sediment, has a loose structure, large porosity, and no stratification. It is relatively hard when dry, but its structure is often rapidly destroyed when soaked in water, and it is prone to shrinkage and collapse, posing a great threat to engineering construction.
[0003] In order to accurately evaluate its collapsible performance and impact, a certain number of exploration wells need to be laid out in accordance with the specifications to take original samples and conduct tests on properties such as the collapsible coefficient and the initial pressure of collapsibility. At present, the sampling of loess exploration wells in northern China generally uses a mechanical Luoyang shovel to make holes, and then experienced workers go down into the well to carve original soil samples from the bottom to the top at different depths on the well wall. The sampling method of manual carving is relatively simple and inefficient. It is often impossible to collect samples normally in areas with high water content and looseness, resulting in a lack of samples in key geological strata, affecting the systematic evaluation of engineering properties. In addition, the sampling method of manual carving is time-consuming, which will increase the time of underground operations. Long-term underground operations also pose certain safety hazards. Summary of the invention
[0004] In view of the problems existing in the background technology, the utility model provides a device for sampling original soil in an exploration well. The device has a simple structure, is easy to carry and easy to operate, can improve the sampling efficiency, reduce the underground operation time, and thus reduce the safety hazards of underground operations. It is especially suitable for loose loess sections.
[0005] In order to achieve the above-mentioned technical objectives, the utility model provides a loess exploration well sampling device, which includes a cylindrical barrel with one end closed and the other end open, a handle is provided at the closed end of the barrel, an annular knife edge is provided at the open port of the barrel, a strip-shaped or arc-shaped hollow groove is provided on the barrel, and a pushing mechanism is provided in the barrel, the pushing mechanism includes a push plate arranged in the barrel and a T-shaped push rod arranged outside the barrel, a push rod slide and an air hole are provided on the sealed end face of the barrel, the T-shaped push rod extends into the barrel from the push rod slide on the sealing face of the barrel and is connected to the push plate.
[0006] The better technical solution of the utility model is as follows: the hollow slots are provided with one or more, and the multiple hollow slots are dispersedly arranged in the same half-cylinder area of the cylinder; the strip-shaped hollow slots are distributed along the axial direction of the cylinder, and the arc-shaped hollow slots are distributed along the circumferential direction of the cylinder.
[0007] The preferred technical solution of the utility model is as follows: the cylinder is made of light stainless steel, has a diameter of 150 mm, a wall thickness of 1 to 2 mm, and the hollow notch is arranged in the middle of the cylinder.
[0008] The better technical solution of the utility model is as follows: the handles are provided with two, which are made of tubular stainless steel, symmetrically distributed on both sides of the closed end surface of the cylinder, and firmly connected to the cylinder by welding; each handle is 100-150mm long.
[0009] The preferred technical solution of the utility model is as follows: the annular blade is a single inclined blade with a blade angle of 8 to 10 degrees.
[0010] A better technical solution of the utility model is as follows: the diameter of the air holes is 1.5 to 2 mm, and there are 2 to 4 air holes.
[0011] The better technical solution of the utility model is as follows: the push plate is a stainless steel disc with a thickness of 4 to 6 mm and a diameter smaller than the inner diameter of the cylinder by 5 to 15 mm, and can slide freely up and down along the inner wall of the cylinder; the T-shaped push rod extends into the cylinder from the push rod sliding opening at the center of the sealing end face of the cylinder, and is welded or threadedly connected to the center of the push plate.
[0012] The preferred technical solution of the utility model is as follows: the width of a single hollow notch is 50-75 mm and the length is 60-80 mm; when there are multiple hollow notches, the width of each hollow notch is 10-15 mm and the length is 50-80 mm.
[0013] The utility model arranges the sampling device into a cylinder, the port of which is provided with a cutting edge, which can be inserted into the well wall for sampling under external pressure, has a simple structure and is easy to operate, can greatly reduce manpower consumption, and promotes operation efficiency and safety; the taken soil sample can be directly pushed into the sample box, which reduces transportation disturbance and improves the accuracy of test data, and is particularly suitable for loose loess layers; a hollow groove is provided on the sampling cylinder, which can not only reduce the weight of the sampling cylinder, but also reduce the friction between the inner wall and the soil, and can facilitate the rapid pushing out of the sample in the cylinder, thereby improving the sampling efficiency, reducing the underground operation time, and thus reducing the underground operation risk. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of a single hollow notch of the utility model;
[0015] Figure 2 It is a top view of the utility model;
[0016] Figure 3 It is a structural schematic diagram of multiple strip-shaped hollow notches in the utility model;
[0017] Figure 4 It is a structural schematic diagram of multiple arc-shaped hollow notches in the utility model;
[0018] Figure 5 It is a reference diagram of the use status of the utility model.
[0019] In the figure: 1 - cylinder, 2 - air hole, 3 - hollow slot, 4 - outer cutting edge, 5 - handle, 6 - push plate, 7 - T-type push rod, 8 - push rod sliding mouth, 9 - side wall of exploration well. DETAILED DESCRIPTION
[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Figures 1 to 5 The drawings are all of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the utility model. The following technical solutions shown in the drawings are specific solutions of the embodiments of the utility model and are not intended to limit the scope of the utility model to be protected. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.
[0022] The embodiment provides a loess exploration well sampling device, such as Figures 1 to 4 As shown, the sampling device includes a cylindrical barrel 1 with one end closed and the other end open. The barrel 1 is made of lightweight stainless steel, with a diameter of 150 mm and a wall thickness of 1 to 2 mm. A handle 5 is provided at the closed end of the barrel 1. Two handles 5 are provided. The handles 5 are made of tubular stainless steel and are symmetrically distributed on both sides of the closed end surface of the barrel 1. The handles 5 are firmly connected to the barrel 1 by welding. Each handle is 100 to 150 mm long, which assists the sampling barrel 1 to penetrate into the soil. An annular blade 4 is provided at the open port of the barrel 1. The annular blade 4 is a single inclined blade with a blade angle of 8 to 10°, which enables the barrel 1 to be quickly inserted into the soil for sampling. A strip-shaped or arc-shaped hollow notch 3 is provided on the barrel 1. The hollow notch 3 is arranged in the middle of the barrel 1. One or more hollow notches 3 are provided. When one is provided, Figure 1 As shown, the hollow slot 3 is an arc slot with a width of 50 to 75 mm and a length of 60 to 80 mm. When there are multiple hollow slots 3, the multiple hollow slots 3 are dispersedly arranged in the same half-cylinder area of the cylinder 1, and the strip-shaped hollow slots 3 are distributed along the axial direction of the cylinder 1 (such as Figure 3 As shown in FIG. 1 ), the arc-shaped hollow slots are distributed along the circumference of the cylinder 1 (as shown in FIG. Figure 4 As shown in FIG. 1 ), when the hollow slots 3 are provided in plurality, each hollow slot has a width of 10 to 15 mm and a length of 50 to 80 mm. Figure 5 As shown, half of the cylinder with the hollow notch 3 faces upward, so there is no need to worry about the sample soil in the cylinder falling off, and because the sample soil is sticky and generally a whole, it will not fall off at will, so the hollow notch will not affect the sampling, and the sampling cylinder is provided with a hollow groove, which can not only reduce the weight of the sampling cylinder, but also reduce the friction between the inner wall and the soil, and can facilitate the rapid push out of the sample in the cylinder.
[0023] The embodiment provides a loess exploration well sampling device, such as Figures 1 to 4 As shown, in order to facilitate the rapid separation of the sample soil in the cylinder 1, a pushing mechanism is provided in the cylinder 1, the pushing mechanism includes a push plate 6 placed in the cylinder 1 and a T-shaped push rod 7 placed outside the cylinder 1, and a push rod slide 8 and an air hole 2 are provided on the sealed end surface of the cylinder 1, and the T-shaped push rod 7 extends into the cylinder 1 from the push rod slide on the sealed surface of the cylinder 1 and is connected to the push plate 6. The aperture of the air hole 2 is 1.5 to 2 mm, and there are 2 to 4 of them. The push plate 6 is a stainless steel plate disc with a plate thickness of 4 to 6 mm and a diameter smaller than the inner diameter of the cylinder by 5 to 15 mm, and can slide freely up and down along the inner wall of the cylinder 1; the T-shaped push rod 7 extends into the cylinder 1 from the push rod slide 8 at the center of the sealed end surface of the cylinder 1, and is welded or threaded to the center of the push plate 6.
[0024] The sampling process of the utility model is as follows: first, after the exploration well is drilled, the wellbore wall is positioned and marked from bottom to top according to the designed sampling depth; then the sample tube is aligned with the sampling point marked on the side wall, and the handle is held by hand, and the sample tube is pushed into the soil 100 to 120 mm by pressing or screwing, and then the handle is rotated to disconnect the bottom of the sample tube, separate from the soil sample body, and pull out the sample tube; the sample is pushed from the sampling tube body 1 into the sample box using the T-handle, and moved to the ground with the help of the hanging basket, and then enters the next sampling point, and the above actions are repeated. After the single-hole sampling is completed, the samples are sent for inspection in batches or directly cut on site with a ring knife. The entire sampling process is simple and convenient, and the sampling tube can be quickly inserted into the well wall for sampling, and the sample soil in the sampling tube can be quickly pushed out, which greatly improves the sampling efficiency, saves underground operation time, and reduces the danger of underground operations.
[0025] The above is only one embodiment of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.
Claims
1. A loess well sampling device, characterized in that: The sampling device comprises a cylindrical barrel (1) with one end closed and the other end open, a handle (5) being provided at the closed end of the barrel (1), an annular knife edge (4) being provided at the open end of the barrel (1), a strip-shaped or arc-shaped hollow notch (3) being provided on the barrel (1), a pushing mechanism being provided inside the barrel (1), the pushing mechanism comprising a pushing plate (6) arranged inside the barrel (1) and a T-shaped pushing rod (7) arranged outside the barrel (1), a pushing rod sliding opening (8) and an air hole (2) being provided on the sealed end surface of the barrel (1), the T-shaped pushing rod (7) extending into the barrel (1) from the pushing rod sliding opening on the sealed surface of the barrel (1) and being connected to the pushing plate (6).
2. A loess exploration well sampling device according to claim 1, characterized in that: One or more hollow slots (3) are provided, and the plurality of hollow slots (3) are dispersedly arranged in the same half-cylinder area of the cylinder (1); the strip-shaped hollow slots (3) are distributed along the axial direction of the cylinder (1), and the arc-shaped hollow slots are distributed along the circumferential direction of the cylinder (1).
3. A loess exploration well sampling device according to claim 1 or 2, characterized in that: The cylinder (1) is made of lightweight stainless steel, has a diameter of 150 mm, and a wall thickness of 1 to 2 mm. The hollow notch (3) is arranged in the middle of the cylinder (1).
4. A loess exploration well sampling device according to claim 1 or 2, characterized in that: The handles (5) are provided with two handles, which are made of tubular stainless steel and are symmetrically distributed on both sides of the closed end surface of the cylinder (1), and are firmly connected to the cylinder (1) by welding; each handle has a length of 100 to 150 mm.
5. A loess exploration well sampling device according to claim 1 or 2, characterized in that: The annular blade (4) is a single inclined blade with a blade angle of 8 to 10 degrees.
6. A loess exploration well sampling device according to claim 1 or 2, characterized in that: The pores (2) have a diameter of 1.5 to 2 mm and are provided in 2 to 4 numbers.
7. A loess exploration well sampling device according to claim 1 or 2, characterized in that: The push plate (6) is a stainless steel disc with a thickness of 4 to 6 mm and a diameter smaller than the inner diameter of the cylinder by 5 to 15 mm, and can slide freely up and down along the inner wall of the cylinder (1); the T-shaped push rod (7) extends into the cylinder (1) from a push rod sliding opening (8) at the center of the sealing end surface of the cylinder (1) and is welded or threadedly connected to the center of the push plate (6).
8. The loess well sampling device according to claim 2, characterized in that: The width of a single hollow notch (3) is 50 to 75 mm, and the length is 60 to 80 mm; when a plurality of hollow notches (3) are provided, each hollow notch has a width of 10 to 15 mm and a length of 50 to 80 mm.