Neutron source and radioactive source shielding device

Abstract

The utility model relates to the technical field of nuclear application, and discloses a neutron source and radioactive source shielding device which comprises a first shielding case, a second shielding case is arranged at the left end of the first shielding case, isolation cabins are arranged on the inner walls of the first shielding case and the second shielding case, and filling layers are arranged between the inner wall of the first shielding case and the outer walls of the isolation cabins. Handles are fixedly connected to the front sides and the rear sides of the outer walls of the first shielding case and the second shielding case, movable hasps are arranged on the two sides of the upper sides of the front ends and the rear ends of the first shielding case and the second shielding case, and bases are arranged at the bottom ends of the first shielding case and the second shielding case. The first shielding case and the second shielding case are connected with the base through a plurality of limiting assemblies, and the base is connected with a plurality of rollers through lifting assemblies. According to the utility model, the working efficiency and the convenience can be improved through the movability of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear application, in particular to a neutron source radiation source shielding device. Background Art

[0002] In exploration technology, neutron sources are often used in nuclear logging, which sends neutrons underground and measures their interaction with the formation to obtain information about underground rock types, aquifers, oil and gas layers, etc. When the exploration stops, the seed source needs to be placed in a shielding device to avoid harm to the human body caused by radiation generated by the radioactive source.

[0003] At present, in order to have a better protective effect, some existing shielding devices are designed to be large in size and heavy in weight. Therefore, when the radiation source and the shielding device need to be moved, it will be troublesome. In addition, as the exploration site changes, the device will be inconvenient to move, which will have a certain impact on the overall work efficiency. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a neutron source radiation source shielding device, which can improve work efficiency and convenience through the mobility of the device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A neutron source radiation source shielding device includes a first shielding cover, a second shielding cover is arranged at the left end of the first shielding cover, isolation chambers are opened on the inner walls of the first shielding cover and the second shielding cover, a filling layer is arranged between the inner wall of the first shielding cover and the outer wall of the isolation chamber, handles are fixedly connected to the front and rear sides of the outer walls of the first shielding cover and the second shielding cover, movable buckles are arranged on both sides of the upper sides of the front and rear ends of the first shielding cover and the second shielding cover, bases are arranged at the bottom ends of the first shielding cover and the second shielding cover, the first shielding cover, the second shielding cover and the base are connected by a plurality of limit assemblies, and the bases are connected to a plurality of rollers through a lifting assembly.

[0007] Furthermore, the lifting assembly includes a motor fixedly connected to the middle part of the upper side of the opposite end of the base and a fixed plate fixedly connected to the inner wall of the middle part of the bottom side of the opposite end of the base, the top opposite side of the fixed plate is rotatably connected to a screw, the screw is connected to the motor through a gear set, the outer wall of the screw is threadedly connected to a slide, and the outer wall of the slide is slidably connected to the inner wall of the base at the opposite end.

[0008] Furthermore, the gear set includes a rotating rod rotatably connected to the inner wall of the middle upper side of the opposite end of the base and a driven bevel gear fixedly connected to the top of the screw rod, the opposite end of the rotating rod penetrates the outer wall of the base and is fixedly connected to the motor driving end, the opposite end of the rotating rod is fixedly connected to the driving bevel gear, and the driving bevel gear and the driven bevel gear are meshingly connected.

[0009] Furthermore, the limiting assembly includes a plurality of slot blocks fixedly connected to the outer side of the top end of the base and a plurality of plug blocks fixedly connected to the outer side of the bottom ends of the first shielding cover and the second shielding cover respectively, the slot blocks and the inner walls of the plug blocks are provided with bolts, and a nut is provided on one side of the outer wall of the bolts.

[0010] Furthermore, the top ends of the rollers are fixedly connected to the bottom ends of the skateboards in sequence.

[0011] Furthermore, the shape of the bottom end of the insert block matches the shape of the inner wall of the top end of the slot block.

[0012] Furthermore, the outer diameter of the bolt is respectively the same as the inner diameter of the through holes at the front and rear ends of the slot block and the through holes on the inner wall of the insert block.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, by starting the motors on both sides, and with the cooperation of the rotating rod, the active bevel gear, the driven bevel gear and the screw, the slide board slides down on the inner wall of the base. When the bottom of the roller moves to fit the ground, a reaction support is generated. The motor is continuously started to make the screw continue to rotate, and the inner wall of the base slides on the outer wall of the slide board until the bottom of the base is away from the ground. The staff can push the handle to move the device as a whole to the lead storage room, and push the device out when needed. The movable device can improve work efficiency and convenience.

[0015] 2. In the utility model, the nut is removed from the bolt by using a wrench so that the bolt can be removed from the slot block, so that the slot block together with the first shielding cover or the second shielding cover is separated from the slot block and the base, which is convenient for replacement and maintenance of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a neutron source radiation source shielding device proposed by the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 A cross-sectional view of a slot block of a neutron source radiation source shielding device proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a first shielding cover of a neutron source radiation source shielding device proposed by the utility model;

[0020] Figure 5 The utility model is a cross-sectional view of the base of a neutron source radiation source shielding device.

[0021] Legend:

[0022] 1. First shielding cover; 2. Second shielding cover; 3. Handle; 4. Base; 5. Active buckle; 6. Motor; 7. Slot block; 8. Insert block; 9. Bolt; 10. Nut; 11. Filling layer; 12. Isolation chamber; 13. Rotating rod; 14. Active bevel gear; 15. Driven bevel gear; 16. Slide plate; 17. Screw; 18. Fixed plate; 19. Roller. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-5 The utility model provides an embodiment: a neutron source radiation source shielding device, comprising a first shielding cover 1, a second shielding cover 2 is arranged at the left end of the first shielding cover 1, the first shielding cover 1 and the second shielding cover 2 are made of 3-5mm thick iron plate, the inner walls of the first shielding cover 1 and the second shielding cover 2 are both provided with an isolation chamber 12, the isolation chamber 12 is made of 304 stainless steel, a filling layer 11 is arranged between the inner wall of the first shielding cover 1 and the outer wall of the isolation chamber 12, the inside of the filling layer 11 is boron-containing polyethylene with a boron content of 5%, and the material is relatively light, Handles 3 are fixedly connected to the front and rear sides of the outer walls of the first shielding cover 1 and the second shielding cover 2, and movable buckles 5 are provided on both sides of the upper sides of the front and rear ends of the first shielding cover 1 and the second shielding cover 2. When the exploration activity stops, the neutron source is placed in the isolation chamber 12, and then the first shielding cover 1 and the second shielding cover 2 are aligned and fitted, and the first shielding cover 1 and the second shielding cover 2 are tightly connected together through the movable buckle 5. The radiation shielding of the neutron source is achieved by the boron-containing polyethylene material of the filling layer 11, and the bottom of the first shielding cover 1 and the second shielding cover 2 are provided with a base 4.

[0025] Specifically, the motor 6 is fixedly connected to the middle part of the upper side of the opposite end of the base 4, and the fixing plate 18 is fixedly connected to the inner wall of the middle part of the bottom side of the opposite end of the base 4, the top opposite side of the fixing plate 18 is rotatably connected with a screw 17, the screw 17 is connected to the motor 6 through a gear set, the outer wall of the screw 17 is threadedly connected with a slide plate 16, the outer wall of the slide plate 16 is slidably connected to the inner wall of the base 4 at the opposite end, the top of the roller 19 is fixedly connected to the bottom end of the slide plate 16 in turn, the rotating rod 13 is rotatably connected to the inner wall of the middle part of the upper side of the opposite end of the base 4, and the driven bevel gear 15 is fixedly connected at the top of the screw 17, the opposite end of the rotating rod 13 penetrates the outer wall of the base 4 and is fixedly connected to the driving end of the motor 6, the opposite end of the rotating rod 13 is fixedly connected to the driving bevel gear 14, the main The active bevel gear 14 and the driven bevel gear 15 are meshedly connected. The motors 6 on both sides are started, so that the rotating rod 13 drives the active bevel gear 14 to rotate, thereby making the driven bevel gear 15 drive the screw 17 to rotate, and then the slide plate 16 is threaded downward in the base 4. When the bottom of the roller 19 moves to the ground and fits with it, a reaction supporting force is generated. The motor 6 is continuously started, and the screw 17 continues to rotate. The inner wall of the relative base 4 slides on the outer wall of the slide plate 16 until the bottom of the base 4 is away from the ground. Then the staff can push the handle 3 to move the entire device into a lead-containing storage room to reduce the harm of neutron source radiation to the external environment and human body. When needed, the device can be pushed out, which is flexible and can improve work efficiency through the mobility of the device.

[0026] Specifically, several slot blocks 7 are fixedly connected to the outer side of the top end of the base 4, and several plug blocks 8 are fixedly connected to the outer side of the bottom ends of the first shielding cover 1 and the second shielding cover 2. Bolts 9 are provided on the inner walls of the slot blocks 7 and the plug blocks 8. Nuts 10 are provided on one side of the outer wall of the bolts 9. The shape of the bottom end of the plug block 8 is consistent with the shape of the inner wall of the top end of the slot block 7. The outer diameter of the bolt 9 is the same as the inner diameter of the through holes at the front and rear ends of the slot block 7 and the through holes on the inner wall of the plug block 8. Use a wrench to remove the nut 10 from the bolt 9 so that the bolt 9 can be removed from the slot block 7, so that the plug block 8 can be separated from the slot block 7 and the base 4 together with the first shielding cover 1 or the second shielding cover 2, which is convenient for the subsequent replacement and maintenance of the roller 19.

[0027] Working principle: First, when the exploration activity stops, the neutron source is placed in the isolation chamber 12, and then the first shielding cover 1 and the second shielding cover 2 are aligned and fitted, and the first shielding cover 1 and the second shielding cover 2 are tightly connected together through the movable buckle 5, and the radiation of the neutron source is shielded by the boron-containing polyethylene material of the filling layer 11. Then, the motors 6 on both sides are started, so that the rotating rod 13 drives the active bevel gear 14 to rotate, so that the driven bevel gear 15 drives the screw 17 to rotate, and then the slide plate 16 slides downward in the base 4. When the bottom of the roller 19 moves to the ground and fits with it, a reaction support force is generated, and the motor 6 is continuously started, and the screw 17 continues to rotate, and the inner wall of the relative base 4 slides on the outer wall of the slide plate 16 until the bottom of the base 4 is away from the ground. Then the staff can push the handle 3 to move the device as a whole to the lead-containing storage room to reduce the harm of neutron source radiation to the external environment and human body. When needed, the device can be pushed out again. It is flexible and can improve work efficiency and convenience through the mobility of the device. The nut 10 is removed from the bolt 9 by using a wrench so that the bolt 9 can be removed from the slot block 7, so that the plug block 8 can be separated from the slot block 7 and the base 4 together with the first shielding cover 1 or the second shielding cover 2, which is convenient for subsequent replacement and maintenance of the roller 19.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A neutron source radiation source shielding device, comprising a first shielding cover (1), characterized in that: A second shielding cover (2) is arranged at the left end of the first shielding cover (1); an isolation chamber (12) is provided on the inner wall of the first shielding cover (1) and the second shielding cover (2); a filling layer (11) is provided between the inner wall of the first shielding cover (1) and the outer wall of the isolation chamber (12); handles (3) are fixedly connected to the front and rear sides of the outer walls of the first shielding cover (1) and the second shielding cover (2); movable buckles (5) are provided on the upper sides of the front and rear ends of the first shielding cover (1) and the second shielding cover (2); a base (4) is provided at the bottom end of the first shielding cover (1) and the second shielding cover (2); the first shielding cover (1), the second shielding cover (2) and the base (4) are connected via a plurality of limit assemblies; and the base (4) is connected to a plurality of rollers (19) via a lifting assembly.

2. A neutron source radiation source shielding device according to claim 1, characterized in that: The lifting assembly comprises a motor (6) fixedly connected to the middle of the upper side of the opposite end of the base (4) and a fixing plate (18) fixedly connected to the inner wall of the middle of the bottom side of the opposite end of the base (4), a screw rod (17) is rotatably connected to the opposite side of the top of the fixing plate (18), the screw rod (17) is connected to the motor (6) through a gear set, the outer wall of the screw rod (17) is threadedly connected to the slide plate (16), and the outer wall of the slide plate (16) is slidably connected to the inner wall of the base (4) at the opposite end.

3. A neutron source radiation source shielding device according to claim 2, characterized in that: The gear set comprises a rotating rod (13) rotatably connected to the inner wall of the middle part of the upper side of the opposite end of the base (4) and a driven bevel gear (15) fixedly connected to the top of the screw rod (17), the opposite end of the rotating rod (13) penetrates the outer wall of the base (4) and is fixedly connected to the driving end of the motor (6), the opposite end of the rotating rod (13) is fixedly connected to the driving bevel gear (14), and the driving bevel gear (14) and the driven bevel gear (15) are meshingly connected.

4. A neutron source radiation source shielding device according to claim 1, characterized in that: The limit assembly comprises a plurality of slot blocks (7) fixedly connected to the outside of the top end of the base (4) and a plurality of plug blocks (8) fixedly connected to the outside of the bottom ends of the first shielding cover (1) and the second shielding cover (2), respectively; the inner walls of the slot blocks (7) and the plug blocks (8) are both provided with bolts (9), and one side of the outer wall of the bolts (9) is provided with nuts (10).

5. A neutron source radiation source shielding device according to claim 1, characterized in that: The top ends of the rollers (19) are fixedly connected to the bottom ends of the slide plates (16) in sequence.

6. A neutron source radiation source shielding device according to claim 4, characterized in that: The shape of the bottom end of the insert block (8) matches the shape of the inner wall of the top end of the slot block (7).

7. A neutron source radiation source shielding device according to claim 4, characterized in that: The outer diameter of the bolt (9) is respectively the same as the inner diameter of the through holes at the front and rear ends of the slot block (7) and the inner wall through hole of the insert block (8).

Images