Novel sampling device based on soil radon concentration detection

Abstract

The utility model relates to the field of soil detection, and discloses a novel sampling device based on soil radon concentration detection, which comprises a drill rod and a sampling barrel, the rod part of the drill rod is sequentially provided with a drill bit, a spiral plate and an inverted conical boss from bottom to top, and the maximum outer diameter of the boss is not greater than the outer diameter of the spiral plate; the spiral plate is used for extruding soil reversed by the spiral plate to the hole wall in the drilling process of the drill rod; bearings are embedded in the top and the bottom of the sampling barrel, the rod part of the drill rod is rotationally mounted in the sampling barrel through the bearings, and the sampling barrel and the drill rod are sealed through a sealing ring; the rod part of the drill rod is exposed out of the sampling barrel, and a joint connected with a driving device is arranged at the end part of the drill rod; the outer diameter of the sampling barrel is equal to that of the boss, an annular groove is formed in the bottom of the sampling barrel, a plurality of air inlet holes communicated with an inner cavity of the sampling barrel are formed in the annular groove, and the air outlet pipe is arranged on the top of the sampling barrel. According to the utility model, the sampling operation process can be simplified, the sampling efficiency is improved, and the sampling accuracy is high.

Description

Technical Field

[0001] This utility model relates to the field of soil testing, and in particular to a novel sampling device based on soil radon concentration detection. Background Technology

[0002] Soil radon concentration detection equipment includes a radon meter and corresponding auxiliary equipment such as a vacuum pump, steel rod, hammer, and sampler. The detection process is as follows: A detection point is determined; at the point, personnel use a hammer to drive a solid steel rod into the soil to a specified depth. The rod is then pulled out, and a hollow sampler with an air hole at the tip is quickly inserted into the drilled hole. The sampler should be sealed near the surface to prevent atmospheric seepage. An air pump is used to extract the air, which is then introduced into the radon meter for detection. The existing detection process has the following problems:

[0003] 1. During the process of manually hammering steel rods to form holes, both driving the steel rods into and pulling them out of the soil layer consume a lot of manpower. Sometimes the hole depth is insufficient, the hole quality is not high, and the steel rods are easily deformed and damaged.

[0004] 2. When inserting the sampler after pulling out the steel rod, the surrounding soil may be disturbed and fall into the hole, clogging the sampling hole of the sampler. It may also bring air into the hole, affecting the accuracy of the test data.

[0005] 3. In soft soil layers, the hole is prone to collapse when the steel rod is pulled out forcefully, so the success rate of drilling in soft soil layers is low, which affects the progress of the test.

[0006] Based on this, this application provides a novel sampling device that simplifies the sampling process and improves sampling accuracy to solve the above problems. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a novel sampling device that simplifies the sampling operation process and improves sampling accuracy.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A novel sampling device for detecting soil radon concentration is provided, comprising a drill rod and a sampling tube. The drill rod has, from bottom to top, a drill bit, a spiral plate, and an inverted conical boss. The maximum outer diameter of the boss is not greater than the outer diameter of the spiral plate, and it is used to compress the soil extruded by the spiral plate against the borehole wall during drilling. Bearings are embedded at the top and bottom of the sampling tube. The drill rod is rotatably mounted inside the sampling tube via the bearings, and the sampling tube and drill rod are sealed together by a sealing ring. The drill rod protrudes from the sampling tube, and a connector for connecting to a drive device is provided at its end. The outer diameter of the sampling tube is equal to the outer diameter of the boss, and its bottom has an annular groove containing multiple air inlets communicating with the inner cavity of the sampling tube. An air outlet is located at the top of the sampling tube.

[0010] In some optional embodiments, the sampling tube consists of a tube body and an air outlet connector. Bearings are respectively installed at the bottom of the tube body and the top of the air outlet connector. The rod of the drill rod is rotatably installed in the tube body and the air outlet connector through the bearings. The bottom of the air outlet connector is provided with a stepped hole that communicates with the air outlet pipe. The top of the tube body is inserted into the stepped hole and fixed.

[0011] In some alternative embodiments, the maximum outer diameter of the boss is 2 to 10 mm smaller than the outer diameter of the spiral plate.

[0012] In some alternative embodiments, a guide tube is also included, the inner diameter of which is larger than the outer diameter of the spiral plate, and the top inner wall of the guide tube is provided with multiple sealing rings for sealing between it and the sampling tube.

[0013] In some alternative embodiments, the bottom of the guide cylinder is provided with a foldable flap.

[0014] In some alternative embodiments, the bottom of the guide tube is also provided with a plurality of fixing nails that can be inserted into the soil.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model integrates the drill rod and the sampling tube into a single structure. The sampling tube can be brought into the soil at the same time as the drill rod drills into the soil, which greatly simplifies the operation process compared to the traditional sampling process. Moreover, the drilling operation can be carried out by using a drive device such as an electric drill to drive the drill rod, which greatly reduces the labor intensity.

[0017] 2. During drilling, the spiral plate and boss squeeze the soil, resulting in good hole wall formation quality, which can effectively prevent the air inlet from being blocked. In addition, the size of the hole wall matches the size of the sampling tube, which can effectively isolate the outside air and improve the detection accuracy.

[0018] 3. The design of the guide cylinder allows the sampling device to be fixed by stepping on it, which not only provides a stable guiding function for the sampling device during drilling and ensures the quality of the hole, but also seals the hole to prevent outside air from entering the hole and affecting the detection accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a cross-sectional view of the novel sampling device provided by this utility model;

[0021] Figure 2 yes Figure 1 A diagram showing the hole formation status of the novel sampling device.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1—Drill rod, 1.1—Drill bit, 1.2—Helical plate, 1.3—Boss, 1.4—Joint, 2—Sampling cylinder, 2a—Cylinder body, 2b—Air outlet connector, 2.1—Annular groove, 2.2—Air inlet, 3—Bearing, 4—Sealing ring, 5—Air outlet pipe, 6—Guide cylinder, 6.1—Flip plate, 6.2—Fixing nail. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Example 1

[0029] Please see Figure 1 and Figure 2 This embodiment provides a novel sampling device based on soil radon concentration detection, including a drill rod 1 and a sampling tube 2, wherein:

[0030] The drill rod 1 has a drill bit 1.1, a spiral plate 1.2, and an inverted conical boss 1.3 arranged sequentially from bottom to top. The maximum outer diameter of the boss 1.3 is not greater than the outer diameter of the spiral plate 1.2. Preferably, the maximum outer diameter of the boss 1.3 is 2 to 10 mm smaller than the outer diameter of the spiral plate 1.2. It is used to squeeze the soil reversed by the spiral plate against the hole wall during the drilling process, which can improve the hole quality, prevent hole collapse, and effectively reduce the probability of hole blockage.

[0031] The top and bottom of the sampling cylinder 2 are both fitted with bearings 3. The rod of the drill rod 1 is rotatably installed in the sampling cylinder 2 through the bearings 3, and the sampling cylinder 2 and the drill rod 1 are sealed by a sealing ring 4. The rod of the drill rod 1 protrudes from the sampling cylinder 2, and a connector 1.4 connected to the drive device is provided at its end. The drive device can be an electric device such as a hand drill. The drill rod is driven by the electric device to drill holes, which greatly reduces the labor intensity compared to the method of hammering.

[0032] The outer diameter of the sampling tube 2 is equal to the outer diameter of the boss 1.3. The bottom of the tube is provided with an annular groove 2.1. The annular groove 2.1 is provided with multiple air inlets 2.2 that are connected to the inner cavity of the sampling tube 2. The air inlets are located in the annular groove to ensure the smooth sampling of the soil. The air outlet pipe 5 is located at the top of the sampling tube 2.

[0033] In practice, a drill rod is driven into the soil using a power drill or similar device. As the drill rod penetrates the soil, it also carries the sampling tube into the borehole. Due to the compression of the soil by the spiral plate and the boss, the borehole wall is well formed, and the size of the formed hole matches the size of the sampling tube, which can effectively isolate the outside air. Once the drill rod has penetrated to the set depth, the air outlet pipe of the sampling tube can be connected to the radon detector.

[0034] Example 2

[0035] Based on Example 1, as shown in the appendix Figure 1 and attached Figure 2 As shown, in this embodiment, the sampling cylinder 2 is designed to consist of a cylinder body 2a and an air outlet connector 2b. Bearings 3 are respectively embedded in the bottom of the cylinder body 2a and the top of the air outlet connector 2b. The rod of the drill rod 1 is rotatably installed in the cylinder body 2a and the air outlet connector 2b through the bearings 3. The bottom of the air outlet connector 2b is provided with a stepped hole that communicates with the air outlet pipe 5. The top of the cylinder body 2a is inserted into the stepped hole and fixed. The fixing method is preferably welding.

[0036] Example 3

[0037] Based on Example 1 or Example 2, as shown in the appendix Figure 1 and attached Figure 2 As shown, this embodiment further includes a guide cylinder 6, the inner diameter of which is larger than the outer diameter of the spiral plate 1.2, and the top inner wall of the guide cylinder 6 is provided with multiple sealing rings 4 for sealing between it and the sampling cylinder 2. The guide cylinder designed in this embodiment not only provides stable guidance during drilling of the sampling device, ensuring the quality of the borehole, but also seals the borehole to prevent outside air from entering and affecting the detection accuracy.

[0038] Preferably, the bottom of the guide cylinder 6 is provided with a foldable flap 6.1. When in use, the flap can be lowered and stepped on with both feet to fix the sampling device well.

[0039] Preferably, the bottom of the guide cylinder 6 is also provided with a plurality of fixing nails 6.2 that can be inserted into the soil. This design can better fix the sampling device.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel sampling device based on soil radon concentration detection, characterized in that: Includes drill pipe and sampling tube, wherein: The drill rod has a drill bit, a spiral plate and an inverted conical boss arranged from bottom to top. The maximum outer diameter of the boss is not greater than the outer diameter of the spiral plate. It is used to squeeze the soil pushed out by the spiral plate against the hole wall during the drilling process. The top and bottom of the sampling tube are fitted with bearings, and the rod of the drill rod is rotatably installed in the sampling tube through the bearings. The sampling tube and the drill rod are sealed by a sealing ring. The drill rod protrudes from the sampling cylinder, and a connector for connecting to the drive device is provided at its end; The outer diameter of the sampling tube is equal to the outer diameter of the boss. It has an annular groove at its bottom, and multiple air inlets connected to the inner cavity of the sampling tube are provided in the annular groove. The air outlet is located at the top of the sampling tube.

2. The novel sampling device according to claim 1, characterized in that: The sampling tube consists of a tube body and an air outlet connector. Bearings are respectively installed at the bottom of the tube body and the top of the air outlet connector. The rod of the drill rod is rotatably installed in the tube body and the air outlet connector through the bearings. The bottom of the air outlet connector is provided with a stepped hole that communicates with the air outlet pipe. The top of the tube body is inserted into the stepped hole and fixed.

3. The novel sampling device according to claim 1, characterized in that: The maximum outer diameter of the boss is 2 to 10 mm smaller than the outer diameter of the spiral plate.

4. The novel sampling device according to any one of claims 1 to 3, characterized in that: It also includes a guide cylinder, the inner diameter of which is larger than the outer diameter of the spiral plate, and the top inner wall of the guide cylinder is provided with multiple sealing rings for sealing between it and the sampling cylinder.

5. The novel sampling device according to claim 4, characterized in that: The bottom of the guide cylinder is equipped with a foldable flap.

6. The novel sampling device according to claim 5, characterized in that: The bottom of the guide tube is also equipped with multiple fixing nails that can be inserted into the soil.

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