Auxiliary drilling mechanism for formation radon detection

Abstract

This utility model relates to an auxiliary drilling mechanism for radon gas detection in formations, including a support frame, a drilling mechanism, and a hammer pressing mechanism. The support frame is equipped with the hammer pressing mechanism, which has a pressing tube. Strike on the corresponding hammer pressing mechanism allows the lower end of the pressing tube to insert into the formation. The drilling mechanism has a drill rod that extends into the pressing tube without contacting it. After the pressing tube is inserted into the formation a certain distance, the drill rod moves downwards to remove soil from the pressing tube, thus completing the drilling operation. The beneficial effect of this utility model is that it makes the soil inside the drilled hole more compact, making it less likely to be extracted during radon gas detection, thus preventing the loss of radon gas from the soil.

Description

Technical Field

[0001] This utility model relates to the field of formation radon detection technology, and in particular to an auxiliary drilling mechanism for formation radon detection. Background Technology

[0002] Radon is a naturally occurring radioactive gas. Long-term exposure can induce lung cancer. Therefore, radon testing is required when assessing building sites and underground spaces in mining areas, as well as when designing ventilation systems or improving soil conditions.

[0003] The existing method for detecting radon involves drilling a hole in the soil using a regular drill bit, and then inserting a detection rod into the hole (the detection rod is hollow, with a side hole on its lower side and an air intake head at its upper end, which is connected to the central cavity and also connected to the radon detection equipment through a pipe; a conical plug is located near the upper end of the detection rod, which blocks the drill hole), thereby enabling the detection of radon.

[0004] In existing related technologies, after drilling a hole with a drill bit, the detection rod cannot be directly inserted into the hole. An auxiliary tube needs to be inserted into the hole first (the lower end of the auxiliary tube is conical, and its diameter is slightly larger than the hole). When the auxiliary tube is inserted into the hole, the soil on the side wall of the hole is compacted (otherwise, when extracting radon gas later, some soil particles may be easily extracted).

[0005] However, the problem is that this method of using auxiliary pipes to compress the sidewalls of the borehole cannot effectively compress the soil on the side of the borehole. During the subsequent radon extraction, a lot of soil particles will still be extracted (resulting in a loss of radon at the borehole wall), affecting the detection of radon. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an auxiliary drilling mechanism for radon detection in the formation, which solves the problem that soil particles in the borehole are easily extracted along with radon during radon extraction, resulting in radon loss in the soil.

[0007] The purpose of this utility model is achieved through the following technical solution: an auxiliary drilling mechanism for radon gas detection in formations, including a support frame, a drilling mechanism, and a hammer pressing mechanism;

[0008] The support frame is equipped with a hammer pressing mechanism, which has a pressing tube; when the corresponding hammer pressing mechanism is hammered, the lower end of the pressing tube can be inserted into the formation.

[0009] The drilling mechanism has a drill rod that extends into the lower pressure tube without the two contacting each other;

[0010] After the pressure pipe is inserted into the stratum a certain distance, the drill rod moves downward to remove the soil in the pressure pipe, thus completing the drilling operation.

[0011] As a preferred technical solution of this application, the support frame includes a base plate and a support rod. The base plate has upper and lower through holes A at its edge, and a support rod capable of sliding up and down is installed within through hole A and locked in place by screws. The base plate also has upper and lower through holes B, where a hammer-pressing mechanism capable of sliding up and down can be installed. When the hammer-pressing mechanism is installed within through hole B, it can perform upper and lower limit movements. Before drilling, the screws are tightened, and the entire auxiliary drilling mechanism is supported on the ground by the support rod, preventing the base plate from falling to the ground. During drilling, the pressing tube is inserted into the ground a certain distance by hammering, and then the screw is loosened. The limiting mechanism between the hammer-pressing mechanism and through hole B prevents the base plate from falling to the ground.

[0012] As a preferred technical solution of this application, the hammering and pressing mechanism includes a pressing tube, an upper plate, a lower plate, and vertical columns. The upper plate and lower plate are located above and below the substrate, respectively. Multiple vertical columns can slide vertically through the substrate, with the upper end of each column fixed to the upper plate and the lower end fixed to the lower plate. The upper end of the pressing tube is fixed to the lower plate. The upper plate is struck by a hammer or a small pile hammer machine.

[0013] Furthermore, the upper end of the pressure tube passes through the lower plate and is fixed by the third locking nut, forming a detachable pressure tube structure; the upper end of the vertical column is fixed to the upper plate by the first locking nut, and the lower end of the vertical column is fixed to the lower plate by the second locking nut, forming a detachable vertical column structure.

[0014] As a preferred technical solution of this application, the drilling mechanism includes a drill rod, a drilling motor, and a linear telescopic motor; the drilling motor is supported and fixed on the upper surface of the substrate by the linear telescopic motor, and the drill rod is installed on the output shaft of the drilling motor, which passes through the substrate and extends into the pressure tube.

[0015] As a preferred technical solution of this application, it also includes a jack; a jack is placed on the ground, and the jack is located below the substrate; when the pressure tube is gradually knocked into the ground, the height of the substrate also decreases synchronously, and finally the substrate comes into contact with the jack, and the pressure tube can be pulled out of the soil by the jack.

[0016] As a preferred technical solution of this application, it also includes an auxiliary expansion tube; the lower end of the auxiliary expansion tube is tapered; after drilling is completed and the lower pressure tube is pulled out, the auxiliary expansion tube is inserted back into the drilled hole, and the auxiliary expansion tube is hammered into the drill, then the auxiliary expansion tube is pulled out, and then the radon gas detection rod is placed.

[0017] As a preferred technical solution of this application, the upper surface of the substrate is further fixed with a protective sleeve by screws to form a structure that prevents the drilling mechanism from being hit by the hammer.

[0018] To facilitate understanding, the core design points of this scheme will be explained as follows:

[0019] (1) In existing related technologies, if radon gas detection is to be performed on the soil of a stratum: a. first, a hole is drilled in the stratum using a drill bit, b. then the radon gas is used... Figure 2 The auxiliary expanding tube 50 shown is inserted into the borehole, which presses the inner wall of the borehole more tightly - expanding the borehole (to prevent soil from falling off the borehole wall after drilling, thus preventing the radon detection rod from extracting soil particles when extracting gas from the soil). c. Then the auxiliary expanding tube 50 is taken out. d. Then the radon detection rod is put into the expanded borehole, and then the air in the soil is extracted by the radon detection rod through the corresponding mechanism.

[0020] (2) In this scheme, a. first, the pressure tube is inserted into the soil by hammering (only a certain distance is inserted), and then the soil inside the pressure tube is drilled out using a drill rod; b. then the pressure tube is inserted downwards a certain distance, and then the soil is removed from the pressure tube using a drill rod. After repeating this process, a hole of appropriate depth is drilled; c. the advantage of this approach is that the formation of the hole actually depends on the insertion of the pressure tube itself. The drill rod only removes the soil inside the pressure tube. In this way, the soil on the inner wall of the hole is not loose, and less soil is extracted when the radon detection rod performs the extraction work.

[0021] This invention has the following advantages: it makes the soil inside the drilled hole more compact, so that the soil is not easily extracted during the radon detection process (thereby avoiding the loss of radon in the soil and improving the accuracy of radon detection). Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the radon gas detection rod and the auxiliary expansion tube.

[0024] In the diagram: 10-Support frame, 11-Base plate, 12-Support rod, 13-Screw, 20-Drilling mechanism, 21-Drill rod, 22-Drilling motor, 23-Linear telescopic motor, 30-Hammer pressing mechanism, 31-Pressing tube, 3101-Third locking nut, 32-Upper plate, 33-Lower plate, 34-Vertical column, 3401-First locking nut, 3402-Second locking nut, 40-Jack, 50-Auxiliary expansion tube, 60-Radon gas detection rod, 70-Protective cylinder. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0026] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this utility model is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0027] It should be noted that, in existing related technologies, to detect radon in the soil of a stratum: a. first, a hole is drilled into the stratum using a drill bit; b. then... Figure 2 The auxiliary expanding tube 50 shown is inserted into the borehole, which presses the inner wall of the borehole more tightly - expanding the borehole (to prevent soil from falling off the borehole wall after drilling, thus preventing the radon detection rod from extracting soil particles when extracting gas from the soil). c. Then the auxiliary expanding tube 50 is taken out. d. Then the radon detection rod is put into the expanded borehole, and then the air in the soil is extracted by the radon detection rod through the corresponding mechanism.

[0028] However, the problem is that because a drill bit was used to drill the hole (the drilling method makes the soil on the hole wall relatively loose), even if an auxiliary expander 50 is used to expand the hole (to make the soil on the inner wall of the hole compact), the compactness of the inner wall of the hole is not enough, and a lot of soil will still be extracted when the radon gas detection rod is working.

[0029] Therefore, this solution offers the following approach: a. First, insert the pressure tube into the soil by hammering (inserting it only a short distance), then use a drill rod to remove the soil from inside the pressure tube; b. Then, insert the pressure tube further down a short distance, and then use the drill rod to remove the soil from inside the pressure tube again. Repeat this process to create a hole of suitable depth; c. The advantage of this approach is that the formation of the hole actually depends on the insertion of the pressure tube itself. The drill rod only removes the soil from inside the pressure tube. This prevents the soil on the inner wall of the hole from loosening, resulting in less soil being extracted during the subsequent radon detection rod extraction process.

[0030] The solution approach of this invention will be explained below through specific embodiments (it should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other).

[0031] See Figure 1 As shown in the figure, this specific embodiment discloses an auxiliary drilling mechanism for radon gas detection in formations, including a support frame 10, a drilling mechanism 20, and a hammer pressing mechanism 30;

[0032] A hammer pressing mechanism 30 is provided on the support frame 10, and the hammer pressing mechanism 30 has a pressing tube 31; in addition, a drilling mechanism 20 that can move up and down is provided on the support frame 10; the drilling mechanism 20 has a drill rod 21 (with auger blades), the drill rod 21 extends into the pressing tube 31, and the two do not contact each other.

[0033] During operation: a. The hammering and pressing mechanism 30 is struck with a hammer or a small pile hammer machine to insert the lower end of the pressing tube 31 into the soil (e.g., insert the pressing tube 31 15cm); b. Then the drilling mechanism 20 starts working and gradually descends (e.g., descends 15cm) to remove the soil from the pressing tube 31; c. Then the drilling mechanism 20 rises again, and steps a and b are repeated to finally drill a hole of the appropriate depth.

[0034] It should be noted that since the appropriate depth of the hole is mainly achieved by the pressure tube 31, the drilling mechanism 20 only removes the soil inside the pressure tube 31. Therefore, the soil at the hole wall is not easily loosened (compared to the method of drilling directly with a drill bit). As a result, less soil is extracted when the radon gas is extracted from the soil using the radon gas detection rod.

[0035] The structure of the support frame 10 will be further explained below.

[0036] See Figure 1 The support frame 10 includes a base plate 11 and a support rod 12; wherein, the base plate 11 is rectangular and has upper and lower through holes A at the four corners of the base plate 11; the support rod 12 is placed in the through hole A (the support rod 12 can slide up and down in the through hole A and the support rod 12 is locked by a screw 13).

[0037] In addition, the substrate 11 has upper and lower through holes B, and a hammer pressing mechanism 30 that can slide up and down is installed in the through hole B. When the hammer pressing mechanism 30 is installed in the through hole B, it can be limited to the upper and lower limits (that is, the hammer pressing mechanism 30 cannot be taken out from the through hole B from top to bottom or from bottom to top).

[0038] During operation: (1) Before drilling, tighten the screw 13 so that the entire auxiliary drilling mechanism is supported on the ground by the support rod 12 (to prevent the substrate 11 from falling to the ground); (2) During drilling, first use hammering to insert the pressing tube 31 into the ground layer a certain distance (e.g., 15cm), and then loosen the screw 13 (at this time, the support rod 12 no longer plays a supporting role, which makes it easier for the substrate 11 to descend as the pressing tube 31 is inserted into the ground layer), that is, the limiting between the pressing mechanism 30 and the through hole B is used to prevent the substrate 11 from falling to the ground.

[0039] The hammer pressing mechanism 30 will be further explained below.

[0040] See Figure 1 The hammering and pressing mechanism 30 includes a pressing tube 31, an upper plate 32, a lower plate 33, and vertical columns 34. The upper plate 32 and lower plate 33 are located above and below the base plate 11, respectively. Multiple vertical columns 34 can slide vertically through the base plate 11, with the upper end of each column fixed to the upper plate 32 and the lower end fixed to the lower plate 33. The upper end of the pressing tube 31 is fixed to the lower plate 33. The upper surface of the upper plate 32 is struck by a hammer or by a small pile hammer machine.

[0041] When the hammer pressing mechanism 30 is working: the upper plate 32 is struck by a hammer or a small pile hammer is used (the hammering point is preferably formed along the axis of the pressing tube 31). The hammering force is transmitted to the pressing tube 31 through the upper plate 32, the vertical column 34, and the lower plate 33 (the lower end of the pressing tube 31 has a cutting edge for easy insertion).

[0042] In this embodiment, the upper end of the pressure tube 31 passes through the lower plate 33 and is fixed by the third locking nut 3101, forming a detachable structure for the pressure tube; the upper end of the vertical column 34 is fixed to the upper plate 32 by the first locking nut 3401, and the lower end of the vertical column 34 is fixed to the lower plate 33 by the second locking nut 3402, forming a detachable structure for the vertical column.

[0043] The structure of the drilling mechanism 20 will be further explained below.

[0044] See Figure 1 The drilling mechanism 20 includes a drill rod 21, a drilling motor 22, and a linear telescopic motor 23. Multiple through holes C are formed on the upper plate 32. The lower end of the linear telescopic motor 23 is fixed on the base plate 11, and the upper end passes through the through holes C and is fixedly connected to the chassis of the drilling motor 22. The drill rod 21 is mounted on the output shaft of the drilling motor 22. A through hole D is formed on the upper plate 32, and a base hole E is formed on the base plate 11. The drill rod 21 passes through the through holes D and E and extends into the lower pressure tube 31.

[0045] The following section provides a further explanation of the structure of the pull-out pressure tube 31.

[0046] See Figure 1 This plan also includes a 40mm jack;

[0047] Place the jack 40 on the ground and position it below the base plate 11. As the pressure tube 31 is gradually driven into the ground, the height of the base plate 11 also decreases simultaneously, eventually bringing the base plate 11 into contact with the jack 40. The jack 40 can then be used to pull the pressure tube 31 out of the soil.

[0048] The following is a further expansion of this plan.

[0049] See Figure 2 This solution also requires an auxiliary expansion tube 50 (similar to the auxiliary tube in the prior art, the lower end of the auxiliary expansion tube 50 is tapered). After drilling is completed and the lower pressure tube 31 is pulled out, the auxiliary expansion tube 50 is inserted back into the drilled hole and hammered into the drill. Then the auxiliary expansion tube 50 is pulled out and the radon gas detection rod 60 is placed.

[0050] The following is a further expansion of this plan.

[0051] See Figure 1 The upper surface of the substrate 11 is also fixed with a protective sleeve 70 by screws, forming a structure to prevent the drilling mechanism from being hit by the hammer.

[0052] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An auxiliary drilling mechanism for radon gas detection in formations, characterized in that: Includes a support frame (10), a drilling mechanism (20), and a hammer pressing mechanism (30); The support frame (10) is provided with a hammer pressing mechanism (30), which has a pressing tube (31); when the corresponding hammer pressing mechanism (30) is hammered, the lower end of the pressing tube (31) can be inserted into the formation. The drilling mechanism (20) has a drill rod (21) that extends into the pressure tube (31) but the two do not contact each other; After the pressure pipe (31) is inserted into the stratum for a certain distance, the drill rod (21) moves downward again to remove the soil in the pressure pipe (31), thereby completing the drilling operation.

2. The auxiliary drilling mechanism for radon gas detection in formations according to claim 1, characterized in that: The support frame (10) includes a base plate (11) and a support rod (12). The substrate (11) has an upper and lower through hole A at its edge. A support rod (12) that can slide up and down is installed in the through hole A and is locked by a screw (13). The substrate (11) also has upper and lower through holes B, and a hammer pressing mechanism (30) that can slide up and down can be installed in the through hole B; when the hammer pressing mechanism (30) is installed in the through hole B, it can perform upper and lower limit positions. Before drilling, the screw (13) is locked, and the entire auxiliary drilling mechanism is supported on the ground by the support rod (12) to prevent the substrate (11) from falling to the ground. During the drilling process, the pressing tube (31) is inserted into the stratum by hammering and then the screw (13) is loosened. The pressing mechanism (30) is limited between the hammer and the through hole B to prevent the substrate (11) from falling to the ground.

3. The auxiliary drilling mechanism for radon gas detection in formations according to claim 1 or 2, characterized in that: The hammer pressing mechanism (30) includes a pressing tube (31), an upper plate (32), a lower plate (33), and a vertical column (34). The upper plate (32) and lower plate (33) are located above and below the substrate (11) respectively. Multiple vertical columns (34) can slide up and down through the substrate (11), and the upper end of the vertical column (34) is fixed on the upper plate (32) and the lower end is fixed on the lower plate (33). The upper end of the pressure tube (31) is fixed on the lower plate (33); At the upper surface of the upper plate (32), a heavy blow is made by hammering or a small pile hammer machine is used for hammering.

4. The auxiliary drilling mechanism for radon gas detection in formations according to claim 3, characterized in that: The upper end of the pressure tube (31) passes through the lower plate (33) and is fixed by the third locking nut (3101), forming a detachable pressure tube structure; The upper end of the vertical column (34) is fixed to the upper plate (32) by the first locking nut (3401), and the lower end of the vertical column (34) is fixed to the lower plate (33) by the second locking nut (3402), forming a detachable structure for the vertical column.

5. The auxiliary drilling mechanism for radon gas detection in formations according to claim 1, characterized in that: The drilling mechanism (20) includes a drill rod (21), a drilling motor (22), and a linear telescopic motor (23); The drilling motor (22) is supported and fixed on the upper surface of the substrate (11) by a linear telescopic motor (23). A drill rod (21) is installed on the output shaft of the drilling motor (22). The drill rod (21) passes through the substrate (11) and extends into the pressure tube (31).

6. The auxiliary drilling mechanism for radon gas detection in formations according to claim 1, characterized in that: It also includes jacks (40); A jack (40) is placed on the ground, and the jack (40) is located below the base plate (11). When the pressure tube (31) is gradually knocked into the ground, the height of the base plate (11) also decreases synchronously, and finally the base plate (11) comes into contact with the jack (40). The pressure tube (31) can be pulled out of the soil by the jack (40).

7. The auxiliary drilling mechanism for radon gas detection in formations according to claim 1, characterized in that: It also includes auxiliary expansion tubes (50); The lower end of the auxiliary expansion tube (50) is tapered. After drilling is completed and the lower pressure tube (31) is pulled out, the auxiliary expansion tube (50) is inserted back into the drilled hole and the auxiliary expansion tube (50) is hammered into the drill. Then the auxiliary expansion tube (50) is pulled out and the radon detection rod (60) is placed.

8. The auxiliary drilling mechanism for radon gas detection in formations according to claim 2, characterized in that: The upper surface of the substrate (11) is also fixed with a protective sleeve (70) by screws, forming a structure to prevent the drilling mechanism from being hit by the hammer.

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