A device for ex situ measurement of the surface radon exhalation rate of a uranium mine

Abstract

The utility model discloses a uranium mine surface radon release rate ectopic measuring device, including the gas collecting cover and the air extraction spare, the upper portion of gas collecting cover is equipped with the gas collecting channel of closing, the surface of gas collecting channel is equipped with two symmetrical connection pipes, the bottom of air extraction spare is equipped with the insertion hole corresponding with connection pipe, air extraction spare is connected with gas collecting channel through connection pipe at insertion hole, and the one end of one connection pipe is equipped with air pump, and the surface of air extraction spare is equipped with the output pipe extending outward, the inside of gas collecting channel is equipped with annular card holder, the upper portion of annular card holder is supported with steel wire cage frame, and the steel wire cage frame is equipped with drying agent, this uranium mine surface radon release rate ectopic measuring device can effectively collect and transfer the radon gas, is not restricted by the gas collection position and environment when measuring, avoids the radiation hidden danger, and is suitable for widely using.

Description

Technical Field

[0001] This utility model relates to the field of ecological restoration technology, and in particular to an ex-situ measurement device for radon precipitation rate on the surface of uranium mines. Background Technology

[0002] Radon is a naturally occurring radioactive gas, primarily originating from rocks or soil containing elements such as uranium and radium. During mining operations, the destruction of rock strata can release radon into the air, soil, or water, causing radiation pollution. Therefore, radon release rate monitoring is necessary during the reclamation of abandoned mining sites or the remediation of abandoned mines. This monitoring helps assess the radiation risk level of the mining area, thereby evaluating the effectiveness of uranium mine decommissioning and remediation efforts or taking further measures to ensure that ecological restoration meets environmental standards.

[0003] Currently, the determination of radon release rate in uranium mines generally adopts the accumulation method according to standard EJ / T979-95. After radon gas accumulates in the radon collection hood for a certain period of time, a radon measuring instrument is connected to measure the radon concentration in the collection hood. The use of existing measuring devices is currently limited, and measurements are usually taken at the radon release site. The long waiting time can cause physical discomfort to personnel. In addition, the sealing effect of radon gas storage is not good.

[0004] Therefore, there is an urgent need for a device that can efficiently collect gas and perform off-site measurements. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems by providing an off-site measurement device for radon evolution rate on the surface of uranium mines, which can effectively collect and transfer radiated radon gas, and is not limited by the gas collection location and environment during measurement, thus avoiding radiation hazards.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: an off-site measuring device for radon precipitation rate on the surface of a uranium mine, comprising a gas collecting hood and a gas extraction component. The gas collecting hood has a narrowed gas collecting channel at its top, and two symmetrically arranged connecting pipes are provided on the surface of the gas collecting channel. The bottom of the gas extraction component has an insertion hole corresponding to the connecting pipe. The gas extraction component is connected to the gas collecting channel through the connecting pipe at the insertion hole. One end of one of the connecting pipes is provided with an air pump, and the surface of the gas extraction component has an outwardly extending output pipe.

[0007] Preferably, the gas collection channel is provided with an annular bracket inside, and a wire cage frame is supported above the annular bracket, with a desiccant inside the wire cage frame.

[0008] Preferably, one end of the output pipe is connected to the air extraction device, and the other end is connected to the radon detector. The output pipe is also equipped with a valve.

[0009] Preferably, the connecting pipe is fixed to the surface of the gas collection channel and its upper end is tapered. The inner wall of the insertion hole on the bottom surface of the air extraction component is provided with a flexible silicone layer. Under normal conditions, the insertion hole is self-sealed by the flexible silicone layer. After the connecting pipe is inserted into the flexible silicone layer, the gas collection hood is connected to the air extraction component.

[0010] Preferably, the bottom circumference of the gas collecting hood is provided with a sealing ring.

[0011] Preferably, the outer wall of the gas collection channel is equipped with a thermometer and hygrometer.

[0012] This utility model discloses an in-situ measurement device for radon precipitation rate on the surface of a uranium mine, comprising a gas collection hood and an extraction component. The gas collection hood has a narrowed gas collection channel at its top, and two symmetrically arranged connecting pipes are provided on the surface of the gas collection channel. The bottom of the extraction component has an insertion hole corresponding to the connecting pipe. The extraction component is connected to the gas collection channel through the connecting pipe at the insertion hole. One end of one of the connecting pipes is equipped with an air pump. The surface of the extraction component has an outwardly extending output pipe. An annular bracket is provided inside the gas collection channel, and a wire cage is supported above the annular bracket. A desiccant is placed inside the wire cage. Compared with the prior art, this in-situ measurement device for radon precipitation rate on the surface of a uranium mine has the technical advantages of effectively collecting and transferring precipitated radon gas, being unrestricted by the gas collection location and environment during measurement, and avoiding radiation hazards. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the radon precipitation rate measurement device on the surface of uranium mines in this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of the radon precipitation rate measurement device on the surface of uranium mines in this utility model.

[0015] Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0016] Figure 4 This utility model Figure 2 A magnified structural diagram at point B in the middle.

[0017] Figure 5 This is a schematic diagram showing the connection between the air extraction component and the radon detector in this utility model.

[0018] In the diagram: 1. Gas collection hood; 2. Sealing ring; 3. Gas collection channel; 31. Annular bracket; 32. Wire cage frame; 33. Desiccant; 4. Thermometer and hygrometer; 5. Connecting pipe; 51. Closure; 52. Air pump; 6. Extraction component; 61. Flexible silicone layer; 7. Output pipe; 71. Valve; 8. Radon meter. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0020] Please refer to Figure 1-5 An in-situ measurement device for radon precipitation rate on the surface of a uranium mine includes a gas collection hood 1 and an extraction component 6. The gas collection hood 1 has a narrowed gas collection channel 3 at its top, and two symmetrically arranged connecting pipes 5 are provided on the surface of the gas collection channel 3. The bottom of the extraction component 6 has an insertion hole corresponding to the connecting pipe 5. The extraction component 6 is connected to the gas collection channel 3 through the connecting pipe 5 at the insertion hole. One end of the connecting pipe 5 is provided with an air pump 52, and the surface of the extraction component 6 has an outwardly extending output pipe 7.

[0021] The gas collection channel 3 is provided with an annular bracket 31 inside, and a wire cage frame 32 is supported above the annular bracket 31. The wire cage frame 32 is provided with a desiccant 33. In this embodiment, the desiccant 33 can be silica gel desiccant, anhydrous calcium sulfate desiccant, anhydrous calcium chloride desiccant, Nafion tube, etc., so that the released radon gas is dried and mixed.

[0022] Of course, in order to replace the desiccant 33, the annular clip 31 can be press-fitted with the gas collecting channel 3, that is, the annular clip 31 is stuck in the inner wall of the gas collecting channel 3. When the desiccant needs to be replaced, the annular clip 31 can be removed directly.

[0023] To prevent a large amount of radon gas from escaping from inside the gas collection hood during collection, a sealing ring 2 is provided around its bottom circumference.

[0024] When in use, first place the gas collection hood 1 on the treated and leveled uranium ore surface area, so that the sealing ring 2 contacts the ground. If a large amount of radon gas is dispersed, it can also be buried by soil. After the gas collection hood 1 is placed, the radon gas released from the ground gradually enters the gas collection hood 1. The release time is not less than 30 minutes and not more than 3 hours (preferably 40-80 minutes, and the gas collection time can be shortened when the ambient radon gas concentration is high). Then, install the gas extraction component 6 on the gas collection channel 3 to connect the gas collection hood 1 with the gas extraction component 6.

[0025] Since an air pump is installed at the bottom of one of the connecting pipes 5, when the air pump 52 is running, the radon gas released (in the gas collection hood 1) will pass through the desiccant and eventually enter the extraction component 6; after entering, the gas in the extraction component 6 will enter the gas collection hood 1 through the other connecting pipe; the two connecting pipes 5 are one inlet and one outlet, thereby achieving uniform mixing of the gas in the gas collection hood 1 and the extraction component 6, wherein the air pump works for 1-2 minutes; after mixing, the extraction component 6 is removed; it is taken to a safe area to measure the radon concentration.

[0026] In this embodiment, one end of the two output pipes 7 is connected to the air extraction component 6, and the other end is connected to the radon detector 8. The output pipes 7 are also equipped with valves 71; the valves 71 are always in a closed state before the radon concentration is measured.

[0027] To enable quick assembly and disassembly of the gas collection hood 1 and the extraction component 6, the connecting pipe 5 is fixed to the surface of the gas collection channel 3 and has a tapered constriction 51 at its upper end. The inner wall of the insertion hole on the bottom surface of the extraction component 6 is provided with a flexible silicone layer 61. Under normal conditions, the insertion hole is self-sealed by the flexible silicone layer 61. After the connecting pipe 5 is inserted into the flexible silicone layer 61 through the constriction 51, the gas collection hood 1 and the extraction component 5 are connected. Similarly, when the internal gas has been mixed and needs to be removed for measurement, the gas collection hood 6 can be pulled out as a whole. After being pulled out, the flexible silicone layer 61 achieves self-sealing again through elastic deformation.

[0028] Understandably, in order to connect the gas collection hood 1 with the air extraction component 6, the connecting pipe 5 is made of a rigid material, such as an aluminum alloy pipe, a copper pipe, or a rigid plastic pipe, as long as it can be inserted into the flexible silicone layer 61 to deform it.

[0029] As a preferred option, in order to detect the temperature and humidity of the radon desorption environment, a thermometer and hygrometer 4 can also be installed on the outer wall of the gas collection channel 3.

[0030] In this embodiment, multiple sets of gas collection hoods and extraction devices can be used together to collect gas at multiple sampling points, enabling simultaneous measurement at multiple points.

[0031] Based on the above embodiments, the air pump 52 is a battery-powered air pump, and the radon detector is a RAD7 radon detector, an FD216 radon detector, or others.

[0032] This utility model discloses a method for measuring the radon precipitation rate on the surface of a uranium mine using an in-situ measuring device, comprising the following steps: S1: After the surface area of ​​the uranium ore to be tested is leveled, multiple gas collecting hoods are distributed and fastened to the surface, so that the sealing ring at the bottom of the gas collecting hood is in contact with the medium surface; S2: After a certain period of time, radon gas is released into the gas collecting hood, and then the extraction component is connected to the gas collecting hood; S3: The air pump at the bottom of the connecting pipe in the gas collecting channel is started to mix the radon gas inside the gas collecting hood with the gas inside the extraction component evenly. After even mixing, the extraction component is separated. After separation, the extraction component 6 can be moved to a safe area to avoid the detection personnel being in a radon gas environment for a long time, thereby avoiding or reducing radiation hazards; S4: The two extension pipes on the surface of the extraction component are connected to the air inlet and air outlet of the radon detector, respectively, and the radon detector is turned on to measure the radon concentration.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An apparatus for ex situ measurement of the surface radon exhalation rate of a uranium mine, characterized in that, It includes a gas collection hood and a gas extraction component. The gas collection hood has a narrowed gas collection channel at its top. The surface of the gas collection channel has two symmetrically arranged connecting pipes. The bottom of the gas extraction component has an insertion hole corresponding to the connecting pipe. The gas extraction component is connected to the gas collection channel through the connecting pipe at the insertion hole. One end of the connecting pipe is equipped with an air pump. The surface of the gas extraction component has an outwardly extending output pipe.

2. The in-situ measurement apparatus for surface radon exhalation rate of a uranium mine according to claim 1, characterized in that, The gas collection channel is equipped with an annular bracket inside, and a wire cage frame is supported above the annular bracket. A desiccant is placed inside the wire cage frame.

3. The ex-situ measurement device for radon precipitation rate on the surface of a uranium mine according to claim 1 or 2, characterized in that, One end of the output pipe is connected to the air extraction device, and the other end is connected to the radon detector. A valve is also provided on the output pipe.

4. The ex-situ measurement device for radon precipitation rate on the surface of a uranium mine according to claim 1 or 2, characterized in that, The connecting pipe is fixed to the surface of the gas collection channel and its upper end is tapered. The inner wall of the insertion hole on the bottom surface of the air extraction component is provided with a flexible silicone layer. Under normal conditions, the insertion hole is self-sealed by the flexible silicone layer. After the connecting pipe is inserted into the flexible silicone layer, the gas collection hood is connected to the air extraction component.

5. The ex-situ measurement device for radon precipitation rate on the surface of a uranium mine according to claim 1, characterized in that, The bottom circumference of the gas collection hood is provided with a sealing ring.

6. The ex-situ measurement device for radon precipitation rate on the surface of a uranium mine according to claim 1, characterized in that, The outer wall of the gas collection channel is equipped with a thermometer and hygrometer.

Images