Radiation detection device and detection method thereof

Abstract

The application discloses a radiation detection device and a detection method thereof, and belongs to the field of radiation testing. The device comprises a detection main body, one side of which is provided with a probe for detecting radiation; a protection tube; a gas pump structure, which is provided with an air outlet connected with the protection tube and an air inlet connected with the external environment; a filter structure, which is arranged on the air inlet to make the air entering the protection tube be low-radiation or non-radiation clean air; a pressure relief structure, which is arranged on the side of the protection tube away from the detection main body; and a sealing structure, which is arranged on the end of the protection tube away from the detection main body and forms a flexible or elastic sealing part. The application has the beneficial effect that the low-radiation or non-radiation clean air filtered by the gas pump structure is filled into the protection tube, and the protection tube is in abutment with an object to be detected to form a closed or semi-closed space during detection, so that the dust and impurities in the protection tube are significantly reduced, and the detection result is prevented from being interfered by the radiation dust.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radiation testing, in particular to a radiation detection device and a detection method thereof. BACKGROUND

[0002] The radiation detection device is an indispensable safety equipment in the fields of nuclear facilities, medical and health care, environmental monitoring, etc., which is used for accurately measuring the radioactivity level of the surface of an object or the environment. The detection accuracy of such device is crucial, and its reading directly relates to the safety of personnel and the reliability of the evaluation results.

[0003] The traditional radiation detection device usually directly exposes the detection probe to the environment to be measured. This design has obvious defects: the long-term exposure of the probe is easy to cause dust accumulation, wear or the formation of an oxide layer, resulting in a decrease in detection sensitivity; more importantly, the air between the probe and the surface of the object to be measured during detection may contain suspended particles of radioactive dust, which will directly affect the reading of the probe, causing the measured result to be higher than the actual radiation value of the surface of the object, resulting in a false judgment.

[0004] In order to improve the working environment of the probe, some protective schemes have been proposed in the prior art. For example, a protective cover is arranged to wrap the probe, and a sealing ring is used to adhere to the surface to be measured during detection, so as to isolate the external environment. This scheme reduces the pollution and wear of the probe to a certain extent. However, it fails to solve the pollution problem of the original air in the sealed cavity. When the sealed space is formed, there may be radioactive dust inside; at the same time, the static sealing structure cannot continuously maintain the internal cleanliness and positive pressure during the detection process, and a small leakage may cause the external contaminated air to penetrate, affecting the accuracy and stability of the detection.

[0005] In summary, the radiation detection device of the prior art mainly has the following deficiencies: (1) the probe is easy to be polluted by the environment and deteriorate in performance; (2) the air medium between the probe and the object to be measured during detection may contain radioactive dust that interferes with the measurement; (3) the existing protective structure is mostly passive sealing, and cannot actively purify and maintain the air cleanliness of the detection area. SUMMARY

[0006] In order to improve the problems that the probe is easy to be polluted by the environment and deteriorate in performance, the air medium between the probe and the object to be measured during detection may contain radioactive dust that interferes with the measurement, and the existing protective structure is mostly passive sealing and cannot actively purify and maintain the air cleanliness of the detection area, the present application provides a radiation detection device and a detection method thereof.

[0007] The radiation detection device provided by the present application adopts the following technical scheme:

[0008] The application discloses a radiation detection device, which comprises a detection main body, wherein one side forms a probe for detecting radiation; a protection tube is connected with the detection main body at one end, and the probe is located inside the protection tube; a gas pump structure is provided with an air outlet connected with the protection tube and an air inlet communicated with the external environment; a filtering structure is arranged at the air inlet to make the air entering the protection tube be clean air with low or no radiation; a pressure relief structure is arranged at the side of the protection tube far away from the detection main body; and a sealing structure is arranged at the end of the protection tube far away from the detection main body and forms a flexible or elastic sealing part.

[0009] By adopting the above technical scheme, the filtered clean air is filled into the protection tube, and the protection tube abuts against the object to be detected during detection, so that the protection tube actually forms a nearly closed or completely closed space; before the protection tube abuts against the object to be detected, the clean air enters the protection tube, so that the dust in the protection tube is greatly reduced, and the situation that the dust with radiation exists between the object to be detected and the radiation detector to cause inaccurate radiation detection result is avoided; therefore, the above scheme improves the accuracy of the radiation detection result.

[0010] The protection tube can also protect the probe from being exposed to the outside for a long time, so as to avoid surface damage, dust accumulation or oxide layer formation, and improve the accuracy of radiation detection.

[0011] The sealing structure can make the sealing between the protection tube and the object to be detected better, so as to avoid the situation that the external air with dust enters the protection tube again after the clean air is filled into the protection tube. The pressure relief structure is arranged to continuously inject the clean air into the protection tube after the protection tube abuts against the object to be detected, and continuously replace the air in the protection tube to the outside through the pressure relief structure, so as to continuously maintain the filling degree of the clean air in the protection tube during detection, and better guarantee the accuracy of the detection result.

[0012] Optionally, the gas pump structure comprises a pump body and a connecting pipe; the pump body is arranged at one end of the detection main body away from the protection tube; the connecting pipe communicates the air outlet of the pump body with the protection tube; and the connecting pipe forms an insertion space with the detection main body.

[0013] By adopting the technical scheme, the pump body is arranged at the end of the detection main body away from the protection pipe, so that the structure design can be optimized, the structure is more compact, all structures are segmented and distributed in a linear manner, and the radiation detection device is convenient to hold and take, and the connection pipe is arranged to communicate the pump body and the protection pipe. The insertion space between the connection pipe and the detection main body provides a new method for taking and carrying the radiation detection device, and one person can carry multiple radiation detection devices at the same time by passing a rope through the insertion spaces of the multiple radiation detection devices.

[0014] Optionally, the connection pipe comprises a rigid pipe segment and a flexible pipe segment; the rigid pipe segment is communicated with the air outlet and the protection pipe through the flexible pipe segment, so that the rigid pipe is attached to the detection main body and forms the insertion space relative to the detection main body.

[0015] By adopting the technical scheme, the rigid pipe segment is attached to the detection main body, and the rigid pipe segment and the detection main body are held by the hand at the same time for use, so that the connection pipe is convenient to hold during use, and the connection pipe is not easily damaged due to knocking during holding and moving. During carrying, the insertion space is formed between the rigid pipe segment and the detection main body, so that the connection pipe is convenient to carry.

[0016] Optionally, a recess is arranged on the detection main body, and the recess is arranged to accommodate the rigid pipe segment. The recess is arranged to accommodate the rigid pipe segment during use, so that the connection pipe is convenient to hold and use.

[0017] Optionally, the sealing structure is detachably connected with the protection pipe. If some easily adhered substances adhere to the sealing structure after the sealing structure contacts the object to be detected, the sealing structure can be quickly disassembled and replaced, so that the accuracy of the radiation detection result is maintained.

[0018] Optionally, the sealing structure comprises a threaded ring and a protruding portion arranged on the threaded ring; the threaded ring is threadedly connected with the protection pipe; the sealing portion is arranged on the end face of the threaded ring, and the protruding portion protrudes outward relative to the sealing portion; when the protruding portion contacts the object to be detected, the protruding portion, the sealing portion and the object to be detected form an exhaust gap.

[0019] By adopting the technical scheme, the sealing part is arranged on the threaded ring, the threaded ring is connected with the protection tube through threads, the sealing structure is quickly disassembled and assembled with the protection tube, and a new sealing structure is conveniently replaced. The convex part on the threaded ring is arranged to abut against the to-be-detected object, to limit or select a position to be detected, and then the purified air is discharged out of the protection tube, so that the purified air is concentrated and discharged out of the selected position and discharged on the to-be-detected object, to blow away dust or impurities on the surface of the to-be-detected object that affect the detection result. The abutment between the convex part and the to-be-detected object and the air discharge gap enable the surface of the to-be-detected object to be cleaned more accurately, the cleaning efficiency is improved, and the sealing part abuts against the to-be-detected object after pressing, and then normal radiation detection is performed. Thus, foreign matters affecting the radiation detection accuracy are removed, and the radiation detection result accuracy is greatly improved.

[0020] Optionally, the convex part is connected with the threaded ring through the elastic part.

[0021] By adopting the technical scheme, the convex part is connected with the threaded ring through the elastic part, the convex part is pressed to move relative to the threaded ring when the sealing part needs to abut against the to-be-detected object, and the convex part is reset relative to the threaded ring after detection, so that the convex part is better used to select and limit the position, and the abutment between the sealing part and the to-be-detected object is better performed after the to-be-detected object is cleaned.

[0022] Optionally, the radiation detection device further comprises a mounting shell, the mounting shell is detachably connected with the detection main body, the pump body is arranged in the mounting shell, the filter structure is rotationally connected with an end of the mounting shell, the connecting pipe is in communication with the mounting shell, the pump body has the air inlet and the air outlet, and the air inlet and the air outlet are located in the mounting shell to make the air inlet in communication with the filter structure and the air outlet in communication with the connecting pipe, and a partition plate is arranged in the mounting shell, the air inlet is located on one side of the partition plate, and the air outlet is located on the other side of the partition plate.

[0023] By adopting the technical scheme, the installation shell is detachably connected with the detection main body, which is beneficial to the maintenance of the pump body and the multi-section disassembly of the overall structure, facilitating the transportation of the packaging box. The rotation connection of the filter structure and the installation shell can also rotate the different positions of the filter structure to the space on the side of the air inlet of the partition plate, so that the part of the filter structure without blockage can be rotated to the position for continuous use in the case of blockage affecting the air passing efficiency of the filter structure part. Then, the connecting pipe is manually blocked, and the air can be discharged outward from the part of the filter structure that is blocked, thereby playing a role of backflushing the filter structure. Therefore, the filter and air backflushing and cleaning are integrated on the small radiation detector, thereby improving the service life of the filter structure.

[0024] Optionally, a clamping groove is arranged in the embedding groove, and the shape of the clamping groove matches the shape of the rigid pipe segment; when the rigid pipe segment is embedded into the embedding groove, the end of the rigid pipe segment is separated from the end face of the embedding groove; and when the rigid pipe segment is embedded into the clamping groove, the end of the rigid pipe segment abuts against the end of the clamping groove.

[0025] By adopting the technical scheme, the rigid pipe is embedded into the clamping groove, so that the end of the rigid pipe abuts against the end face of the clamping groove, and the connecting pipe can be automatically blocked, thereby better enabling the air to be backflushed and cleaned at the filter structure.

[0026] A use method of a radiation detection device, comprising the following steps:

[0027] The air pump structure is started, so that external air is discharged into the protection pipe through the filter structure, the air inlet of the air pump structure, and the air outlet of the air pump structure;

[0028] After the protection pipe is aligned with the to-be-detected object for a period of time, the protection pipe is brought close to the to-be-detected object and abuts against the to-be-detected object to make the sealing structure contact the to-be-detected object.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. Improve the accuracy of radiation detection:

[0031] Clean air with low radiation or no radiation after filtering by the air pump structure is filled into the protection pipe. When detecting, the protection pipe abuts against the to-be-detected object to form a closed or semi-closed space, which significantly reduces the dust and impurities in the protection pipe and avoids the interference of radiation dust on the detection result.

[0032] The protection pipe isolates the probe from the external environment, prevents the surface of the probe from being damaged, accumulating dust, or oxidizing, and maintains the sensitivity and detection reliability of the probe.

[0033] 2. Enhance the sealing performance and environmental adaptability:

[0034] The sealing structure is made of flexible or elastic material (such as elastic rubber), which can adapt to the uneven surface of the object to be detected, and ensure the sealing between the protection tube and the object, preventing the external contaminated air from entering.

[0035] The pressure relief structure allows continuous injection and replacement of pure air, maintains the purity of air in the protection tube, and further ensures the accuracy of detection.

[0036] 3. Portability and ease of use:

[0037] The connecting pipe of the air pump structure is composed of rigid pipe section and flexible pipe section. The rigid pipe section can be embedded in the embedding groove of the detection main body, which is convenient for holding and operation. At the same time, the insertion space is formed between the rigid pipe section and the detection main body, and the rope can pass through multiple devices, which is convenient for carrying and storage.

[0038] The sealing structure is detachable (such as threaded connection), which is convenient for replacing the sealing part of the adhering substance and maintaining.

[0039] 4. Prolong the service life and easy maintenance:

[0040] The filter structure is rotatably connected with the mounting shell, which can remove accumulated dust through back blowing operation (blocking the connecting pipe and using the air outlet to blow the filter structure in reverse direction), reducing the blockage and prolonging the service life of the filter structure.

[0041] The mounting shell is detachable, which is convenient for maintaining or replacing the internal air pump and filter structure.

[0042] 5. Multi-functional detection support:

[0043] The protruding part of the sealing structure contacts with the object to be detected, forming an exhaust gap, and the pure air can be concentrated to blow to the detection position, removing the surface dust and improving the detection preparation effect. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is the overall structure schematic diagram of the embodiment of the present application;

[0045] Figure 2 is a structure schematic diagram of a part of the embodiment, mainly showing the structure observed from another view Figure 1 ;

[0046] Figure 3 is a structure schematic diagram of a part of the embodiment, mainly showing the structure of the protection tube and the sealing structure;

[0047] Figure 4 is a structure schematic diagram of a part of the embodiment, mainly showing the structure of the embedding groove position;

[0048] Figure 5Structure diagram which is part of the embodiment, mainly showing one of the structures inside the installation shell;

[0049] Figure 6 Structure diagram which is part of the embodiment, mainly showing Figure 1 the cross-sectional structure;

[0050] Figure 7 Structure diagram which is part of the embodiment, mainly showing Figure 6 the enlarged view of A in

[0051] Figure 8 Structure diagram which is part of the embodiment, mainly showing the structure of other schemes of the installation shell;

[0052] Figure 9 Structure diagram which is part of the embodiment, mainly showing the structure of the installation cover and part of the surrounding parts;

[0053] Figure 10 Structure diagram which is part of the embodiment, mainly showing the exploded structure diagram of the installation shell, the installation cover and the installation tube;

[0054] Figure 11 Structure diagram which is part of the embodiment, mainly showing the structure of the recessed area in the installation cover;

[0055] Figure 12 Structure diagram which is part of the embodiment, mainly showing Figure 8 the cross-sectional structure;

[0056] Figure 13 Structure diagram which is part of the embodiment, mainly showing Figure 12 the enlarged view of B in

[0057] Figure 14 Structure diagram which is part of the embodiment, mainly showing the structure of the water bottle and the installation shell;

[0058] Figure 15 Structure diagram which is part of the embodiment, mainly showing Figure 14 the cross-sectional structure;

[0059] Figure 16 Structure diagram which is part of the embodiment, mainly showing Figure 15 the enlarged view of C in

[0060] Reference signs:

[0061] 1, detection main body; 11, embedded groove; 12, clamping groove;

[0062] 2, protection tube; 21, external connecting tube; 22, butt joint tube

[0063] 3. Air pump structure; 31. Pump body; 32. Connecting pipe; 321. Rigid pipe segment; 322. Flexible pipe segment; 33. Air outlet; 34. Air inlet;

[0064] 4. Filter structure; 41. Installation pipe; 411. Discharge port; 42. Installation cover; 421. Notch; 43. Concave area;

[0065] 5. Pressure relief structure;

[0066] 6. Sealing structure; 61. Sealing part; 62. Thread ring; 63. Protruding part; 64. Elastic part;

[0067] 7. Installation shell; 71. Partition; 72. Cover plate; 73. First end; 74. Second end; 75. Third end; 76,

[0068] Fourth end; 77. Fifth end;

[0069] 8. Water bottle. DETAILED DESCRIPTION

[0070] The following will be described in detail in combination with the accompanying Figures 1-16 The present application is further described in detail.

[0071] The embodiment of the present application discloses a radiation detection device.

[0072] A radiation detection device, comprising: a detection main body 1, a protection pipe 2, an air pump structure 3, a filter structure 4, a pressure relief structure 5 and a sealing structure 6.

[0073] The detection main body 1 is provided with a probe for detecting radiation on one side thereof, and the probe is used for radiation detection. The detection main body 1 has an external shell for holding. The protection tube 2 is connected to the detection main body 1 at one end, and the probe is located inside the protection tube 2. The protection tube 2 can be a rigid tube or a telescopic tube. The air pump structure 3 has an air outlet 33 connected to the protection tube 2 and an air inlet 34 connected to the external environment. The filter structure 4 is arranged at the air inlet 34 to make the air entering the protection tube 2 be clean air with low or no radiation. One of the filter structure 4 is that the filter structure 4 directly uses a filter core for filtering air. The pressure relief structure 5 is arranged at the side of the protection tube 2 away from the detection main body 1. The pressure relief structure 5 can use a small pressure relief valve, wherein an external tube 21 is connected to the side of the protection tube 2, the external tube 21 is in communication with the protection tube 2, and the pressure relief structure 5 is arranged at the end of the external tube 21. The sealing structure 6 is arranged at the end of the protection tube 2 away from the detection main body 1, and a flexible or elastic sealing part 61 is formed. The flexible or elastic sealing part 61 can use elastic rubber. When the protection tube 2 needs to contact with a surface of an object with unevenness, the elastic rubber can better seal between the protection tube 2 and the object.

[0074] The above scheme fills the filtered clean air into the protection tube 2, and when the detection is performed, the protection tube 2 abuts against the object to be detected, so that the protection tube 2 is actually in a nearly closed or completely closed space. Therefore, before the protection tube 2 abuts against the object to be detected, the clean air enters the protection tube 2, so that the dust in the protection tube 2 is greatly reduced, thereby avoiding the case that the dust with radiation exists between the object to be detected and the radiation detector, resulting in inaccurate radiation detection result. Therefore, the above scheme improves the accuracy of the radiation detection result.

[0075] The protection tube 2 of the above scheme can also protect the probe from being exposed to the outside for a long time, so as to avoid surface damage, dust accumulation or oxidation layer formation, and improve the accuracy of radiation detection.

[0076] The sealing structure 6 of the above scheme can make the sealing between the protection tube 2 and the object to be detected better, so as to avoid the case that after the clean air is filled into the protection tube 2, the external air with dust enters the protection tube 2 again. The pressure relief structure 5 is arranged to continuously inject clean air into the protection tube 2 after the protection tube 2 abuts against the object to be detected, and continuously replace the air in the protection tube 2 to the outside through the pressure relief structure 5, so as to continuously maintain the filling degree of the clean air in the protection tube 2 during detection, and better ensure the accuracy of the detection result.

[0077] Specifically, the air pump structure 3 comprises a pump body 31 and a connecting pipe 32. The pump body 31 has an air inlet 34 and an air outlet 33, which correspond to the air inlet end and the air outlet end of the pump body 31 respectively. The pump body 31 is arranged at one end of the detection main body 1 away from the protection pipe 2, and the connecting pipe 32 communicates the air outlet 33 of the pump body 31 with the protection pipe 2; the connecting pipe 32 can form an insertion space with the detection main body 1. More specifically, the connecting pipe 32 comprises a rigid pipe section 321 and a flexible pipe section 322; the rigid pipe section 321 communicates with the air outlet 33 and the protection pipe 2 through the flexible pipe section 322, so that the rigid pipe is attached to the detection main body 1 and forms the insertion space away from the detection main body 1. In more detail, the end of the detection main body 1 is provided with a mounting shell 7, and the pump body 31 is arranged in the mounting shell 7, so as to avoid the air pump from being damaged externally. Two flexible pipe sections 322 are arranged, which are connected to the two ends of the rigid pipe section 321 respectively. One of the flexible pipe sections 322 is directly inserted into the mounting shell 7 and connected to the air outlet 33 of the pump body 31, or the flexible pipe section 322 is directly connected to the mounting shell 7, and a corresponding hole is formed on the mounting shell 7, so that the flexible pipe section 322 communicates with the space inside the mounting shell 7. The pump body 31 is arranged in the mounting shell 7, and the air outlet 33 of the pump body 31 naturally communicates with the space inside the mounting shell 7, so that the flexible pipe section 322 indirectly communicates with the air outlet 33 of the pump body 31 through the mounting shell 7. The other flexible pipe section 322 communicates with the protection pipe 2. The outer side of the protection pipe 2 is further provided with a docking pipe 22, and the hose communicates with the protection pipe 2 through the docking pipe 22. Through the arrangement of the rigid pipe section 321 and the flexible pipe section 322, in actual use, the rigid pipe section 321 can be attached to the detection main body 1, and then the rigid pipe section 321 and the detection main body 1 are held by hand at the same time for use, so as to facilitate holding during use, avoid the overall fixation of the connecting pipe 32 affecting holding, or the connecting pipe 32 being easily knocked and damaged when holding and moving. When carrying, an insertion space can be formed between the rigid pipe section 321 and the detection main body 1, so that a plurality of radiation detection devices can be passed through a rope, which is convenient for carrying a plurality of radiation detection devices.

[0078] In the more specific scheme in which the rigid pipe section 321 is attached to the detection main body 1 in actual use, a recess 11 is formed on the detection main body 1, and the recess 11 can at least accommodate the rigid pipe section 321. Through the arrangement of the recess 11, the rigid pipe section 321 can be embedded into the recess 11 during use, which is more convenient for holding and using.

[0079] Specifically, the sealing structure 6 is detachably connected with the protection tube 2. After the sealing structure 6 contacts with the object to be detected, if some easily adhering substances adhere to the sealing structure 6, the sealing structure 6 can be quickly disassembled and replaced, which is beneficial to keep the accuracy of the radiation detection result.

[0080] More specifically, the sealing structure 6 comprises a threaded ring 62 and a protruding part 63 arranged on the threaded ring 62. The sealing part 61 is an annular elastic rubber, the threaded ring 62 is threadedly connected with the protection tube 2, so as to facilitate disassembly. The sealing part 61 is fixedly arranged on the end surface of the threaded ring 62, and the protruding part 63 protrudes outward relative to the sealing part 61. The protruding part 63 is a rigid rod, and when the protruding part 63 contacts with the object to be detected, an exhaust gap is formed among the protruding part 63, the sealing part 61 and the object to be detected. The sealing part 61 is arranged on the threaded ring 62, and the threaded ring 62 is threadedly connected with the protection tube 2, so as to realize quick disassembly and quick installation between the sealing structure 6 and the protection tube 2. The protruding part 63 on the threaded ring 62 is arranged to abut against the object to be detected, so as to limit or select the position to be detected, and then the purified air is exhausted outward from the protection tube 2, so that the purified air is concentrated and exhausted outward at the selected position, and is exhausted on the object to be detected, so as to blow away the dust or impurities on the surface of the object to be detected which affect the detection result. The protruding part 63 is connected with the threaded ring 62 through an elastic part 64. The elastic part 64 is made of rubber which can be bent and deformed, and the elastic part 64 is deformed under external force, and returns to the original state after the external force disappears. The elastic part 64 can also be a torsion spring or a spring. When the sealing part 61 needs to abut against the object to be detected, the protruding part 63 is pressed to move relative to the threaded ring 62, and after the detection is completed, the protruding part 63 can be reset relative to the threaded ring 62, so as to better realize the function of the protruding part 63 for selecting and limiting the position, and better realize the abutting action of the sealing part 61 and the object to be detected after the object to be detected is cleaned.

[0081] Specifically, the mounting shell 7 is detachably connected with the detection main body 1. The mounting shell 7 is detachably connected with the detection main body 1 through threaded connection. The pump body 31 is arranged in the mounting shell 7. The filter structure 4 is rotationally connected with the end of the mounting shell 7, the connecting pipe 32 is communicated with the mounting shell 7, the pump body 31 has the air inlet 34 and the air outlet 33, and the air inlet 34 and the air outlet 33 are located in the mounting shell 7 so that the air inlet 34 is indirectly communicated with the filter structure 4, and the air outlet 33 is indirectly communicated with the connecting pipe 32. The mounting shell 7 is provided with a partition plate 71, and the length direction of the partition plate 71 matches the length direction of the mounting shell 7. The air inlet 34 is located on one side of the partition plate 71, and the air outlet 33 is located on the other side of the partition plate 71. Therefore, external air enters the mounting shell 7 from one side of the partition plate 71 through the filter structure 4, and then is discharged on the other side of the partition plate 71 through the air outlet 33 and is discharged into the protection pipe 2 through the connecting pipe 32. The partition plate 71 abuts against the filter structure 4.

[0082] In actual use, after being used for a period of time, the filter structure 4 at some positions is blocked by more dust and impurities, which is prone to cause blockage. Then, the filter structure 4 is rotated by virtue of the rotational connection between the filter structure 4 and the mounting shell 7, that is, the part of the filter structure 4 opposite to the air inlet 34 and the part opposite to the air outlet 33 are exchanged in position, and then the flexible pipe section 322 of the connecting pipe 32 is manually blocked, so that the air discharged through the air outlet 33 is discharged outward through the filter structure 4 again, thereby realizing back blowing of the filter structure 4 and increasing the service life.

[0083] More specifically, the mounting shell 7 is provided with a cover plate 72, and the cover plate 72 is rotationally connected with the mounting shell 7. The cover plate 72 is a semicircular structure, and the cover plate 72 covers the part of the air outlet 33 of the mounting shell 7 divided by the partition plate 71. Therefore, when the cover plate 72 is covered, air cannot be discharged through the filter structure 4, so that more air enters the protection pipe 2 through the connecting pipe 32. The edge of the cover plate 72 is provided with a magnet, and the edge of the mounting shell is provided with a magnet or a magnetic material, so that when the cover plate 72 covers the mounting shell 7, the cover plate 72 can be attracted to the mounting shell 7, and the cover plate 72 better blocks the filter structure 4.

[0084] More specifically, the slot 11 is provided with a clamping groove 12, the shape of the clamping groove 12 matches the shape of the rigid pipe segment 321; when the rigid pipe segment 321 is embedded into the slot 11, the end of the rigid pipe segment 321 is away from the end face of the slot 11; when the rigid pipe segment 321 is embedded into the clamping groove 12, the end of the rigid pipe segment 321 abuts against the end of the clamping groove 12. The rigid pipe is embedded into the clamping groove 12, so that the end of the rigid pipe abuts against the end face of the clamping groove 12, which can block the connecting pipe 32 by itself, and better enable the air to be back-flushed and cleaned at the filter structure 4.

[0085] In some embodiments, the mounting shell 7 has two ends, one end is used to connect with the detection main body 1, and the other end is used to mount the filter structure 4.

[0086] In some other embodiments, the mounting shell 7 has three ends, and the three ends of the mounting shell 7 form a "T" shaped structure. The three ends are a first end 73, a second end 74 and a third end 75, the first end 73 and the second end 74 are opposite, and the third end 75 is perpendicular to the first end 73 and the second end 74. The third end 75 is connected with the detection main body 1, and the filter structure 4 is arranged in each of the first end 73 and the second end 74. In this case, the filter structure 4 can be filter cotton, and the filter structure 4 is filled from the first end 73 to the second end 74, that is, the filter cotton is a column, and the filter cotton is inserted into the first end 73 and the second end 74. Correspondingly, there are two filter cottons, so that the air enters from two ends to one end, and the air entering speed is increased.

[0087] The first end 73 and the second end 74 are provided with a mounting pipe 41, the filter cotton is arranged in the mounting pipe 41, the side of the mounting pipe has a discharge port 411, so that the air enters from the end face of the filter cotton, passes through the filter cotton in the mounting pipe, and is discharged from the side of the filter cotton. The end of the mounting pipe 41 is provided with a mounting cover 42, the mounting cover 42 is threadedly connected with the mounting pipe 41, the end face of the mounting cover 42 abuts against the end face of the mounting pipe 41, and the end face of the mounting cover 42 has a recessed area 43 between the end face of the mounting cover 42 and the filter cotton. The mounting cover 42 is provided with a corresponding notch 421, so that when the mounting cover 42 is arranged on the mounting pipe 41, the discharge port 411 on the mounting pipe 41 is not blocked. The air enters the filter face from the end face and is discharged from the side, which can change the flow direction of the air, so that the dust and impurities in the air are better retained in the filter cotton, and the dust and impurities are prevented from being discharged together with the air, and the air filtering effect is better improved. The recessed area 43 can enable part of the dust and impurities to be flushed to the position of the recessed area 43 along the flow of the air, so that part of the dust and impurities are collected.

[0088] In some other embodiments, a fourth end 76 and a fifth end 77 are arranged on the mounting shell 7, the fourth end 76 is located at the position of the first end 73 and is perpendicular to the first end 73, and the fifth end 77 is located at the position of the second end 74 and is perpendicular to the second end 74. Threaded covers are arranged on the fourth end 76 and the fifth end 77, and the threaded covers are connected with the connecting ropes. The threaded covers are used to seal the fourth end 76 and the fifth end 77. A water bottle 8 can also be arranged at the fourth end 76 and the fifth end 77, and the water bottle 8 is threadedly connected with the fourth end 76 and the fifth end 77. Water and an electric heating wire or warm water are placed in the water bottle 8. The part of the filtering structure 4 at the fourth end 76 and the fifth end 77 is overflowed to the horizontal inner part, so that the filtering structure 4 is in a warm and humid state, and the air in a warm, humid and clean state can enter the protection tube 2, so as to better provide a better environment for radiation detection.

[0089] The working process of the device involves the cooperative movement of multiple structures, which is as follows:

[0090] 1. Air purification and filling:

[0091] The air pump structure 3 is started to inhale air from the external environment, and the air is purified into low-radiation or non-radiation clean air through the filtering structure 4 (such as a filter core).

[0092] The clean air is transported from the air outlet 33 of the air pump to the protection tube 2 through the connecting pipe 32 (including the rigid pipe section 321 and the flexible pipe section 322).

[0093] The air pressure in the protection tube 2 is increased, and part of the air is discharged through the pressure relief structure 5 to realize continuous air replacement.

[0094] 2. Detection preparation and sealing:

[0095] The operator holds the detection main body 1, and the sealing structure 6 at the end of the protection tube 2 is abutted with the surface of the object to be detected.

[0096] The elastic material of the sealing part 61 is deformed to adapt to the surface of the object, forming a sealed space; at the same time, the convex part 63 is in contact with the object, limiting the detection position and forming an exhaust gap.

[0097] The pure air is blown out from the exhaust gap to remove dust and impurities on the surface of the object to be detected.

[0098] 3. Detection execution and maintenance:

[0099] The probe performs radiation detection in the protection tube 2. Since the internal air is pure and the sealing is good, the detection result is less affected by the external environment.

[0100] The air pump keeps working, clean air is continuously injected into the protection tube 2, and is discharged through the pressure relief structure 5, so that the internal air is kept fresh and under positive pressure, and external contaminated air is prevented from entering.

[0101] 4. Maintenance and adjustment:

[0102] Back flushing of the filter structure 4: when the filter structure 4 is blocked, the filter structure 4 is rotated to exchange the relative positions of the air inlet 34 and the air outlet 33, and the connecting pipe 32 is blocked (for example, the rigid pipe section 321 is embedded in the clamping groove 12), the air outlet 33 of the air pump reversely blows the filter structure 4, and accumulated dust is removed.

[0103] Replacement of the sealing structure 6: the threaded ring 62 is unscrewed, and the sealing part 61 adhering to the contaminants is replaced.

[0104] Portable adjustment: when carrying, the rigid pipe section 321 is separated from the detection main body 1 to form an insertion space, and a rope is passed through a plurality of devices; when in use, the rigid pipe section 321 is embedded in the embedding groove 11 to facilitate holding.

[0105] In some other embodiments, a detection method of a radiation detection device is provided, and the method comprises the following steps:

[0106] The air pump structure is started, and external air is discharged into the protection tube through the filter structure, the air inlet of the air pump structure, and the air outlet of the air pump structure;

[0107] After the protection tube is aligned with the object to be detected for a period of time, the protection tube is brought close to the object to be detected and abuts against the object to be detected, so that the sealing structure is in contact with the object to be detected.

[0108] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A radiation detection device, characterized in that, include: The detection body has a probe formed on one side for detecting radiation. A protective tube, one end of which is connected to the detection body, and the probe is located inside the protective tube; The air pump structure has an air outlet connected to the protective pipe and an air inlet connected to the external environment; A filter structure is provided at the air inlet to ensure that the air entering the protective tube is clean air with low or no radiation. A pressure relief structure is provided on the side of the protective tube away from the detection body; A sealing structure is provided at the end of the protective tube away from the detection body, and forms a flexible or elastic sealing part; The sealing structure is detachably connected to the protective tube; The sealing structure includes: a threaded ring and a protrusion disposed on the threaded ring; The threaded ring is threadedly connected to the protective tube. The sealing part is disposed on the end face of the threaded ring, and the protrusion protrudes outward relative to the sealing part; when the protrusion contacts the item to be tested, an exhaust gap is formed between the protrusion, the sealing part and the item to be tested; the air is discharged through the exhaust gap by the contact between the protrusion and the item to be tested; after cleaning, pressing hard can make the sealing part contact the item to be tested, and then normal radiation detection is performed.

2. The radiation detection device according to claim 1, characterized in that: The air pump structure includes: a pump body and a connecting pipe; The pump body is located at the end of the detection body away from the protective tube, and the connecting tube connects the air outlet of the pump body to the protective tube; the connecting tube can at least form an insertion space with the detection body.

3. The radiation detection device according to claim 2, characterized in that: The connecting pipe includes a rigid pipe section and a flexible pipe section; the rigid pipe section is connected to the air outlet and the protective pipe through the flexible pipe section, so that the rigid pipe section fits against the detection body and is relatively far away from the detection body to form the insertion space.

4. The radiation detection device according to claim 3, characterized in that: The detection body has a groove, which can be inserted into at least the rigid pipe section.

5. The radiation detection device according to claim 1, characterized in that: The protrusion is connected to the threaded ring via an elastic portion.

6. The radiation detection device according to claim 4, characterized in that: The radiation detection device further includes: a mounting housing; the mounting housing is detachably connected to the detection body. The pump body is housed within the mounting housing; the filter structure is rotatably connected to the end of the mounting housing. The connecting pipe is connected to the mounting housing; the pump body has the air inlet and the air outlet, and the air inlet and the air outlet are both located inside the mounting housing so that the air inlet is connected to the filter structure and the air outlet is connected to the connecting pipe; The mounting housing is provided with a partition, the air inlet is located on one side of the partition, and the air outlet is located on the other side of the partition.

7. The radiation detection device according to claim 6, characterized in that: The groove is provided with a slot, the shape of which matches the shape of the rigid pipe section; When the rigid pipe segment is embedded in the groove, the end of the rigid pipe segment is separate from the end face of the groove; when the rigid pipe segment is embedded in the slot, the end of the rigid pipe segment abuts against the end of the slot.

8. A detection method for a radiation detection device as described in any one of claims 1-7, characterized in that, Includes the following steps: When the air pump is activated, external air is discharged into the protective pipe through the filter structure, the air pump inlet, and the air pump outlet. After aligning the protective tube with the object to be tested for a period of time, bring the protective tube close to the object to be tested and make it come into contact with the sealed structure and the object to be tested.

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