Gamma ray detection device with shielding function

Abstract

The invention specifically provides a gamma ray detection device with a shield, and the detection device comprises a source box container pedestal which is fixed on the ground or a movable platform and can be used for placing or integrating a flaw detector body; the shielding bin can test a device, a container or a pipeline; when the device is used for testing a pipeline welding seam, the shielding bin can be additionally provided with a flexible lead shielding device, so that a pipeline passes through the middle of the shielding bin; the supporting mechanical arm is installed above the mechanical arm base and can lift the shielding bin to a specific position; the source conveying pipe can be used for conveying gamma rays; and a fixed source whip tube with a shielding function is wrapped on the outer side of the source conveying tube. Through the design of the shielding bin and the fixed source side pipe, site cleaning and closed management are not needed in the detection process through gamma rays, and meanwhile normal work of personnel in a plant is not affected; due to the design of the flexible lead shielding device, the outer wall of the shielding bin is better attached to and coated with the pipeline and the wall of the container.

Description

Technical Field

[0001] The invention relates to the field of ray flaw detection, and in particular to a self-shielded gamma ray detection device. Background Art

[0002] Radiographic flaw detection is a non-destructive testing technology that uses high-energy rays (such as X-rays or gamma rays) to irradiate objects to evaluate the internal structure and composition of objects. Currently, radiographic flaw detection is widely used in many fields, including machinery manufacturing, aerospace, engineering construction, nuclear power plant pipelines, etc.

[0003] However, there are also some pain points in X-ray flaw detection, as follows:

[0004] 1. Safety issues: X-ray flaw detection requires the use of high-energy rays. If it is not properly operated or the equipment is unqualified, it may bring safety hazards to the operator and the surrounding environment. In addition, the X-ray flaw detection equipment itself also needs regular maintenance and care to ensure its safety and accuracy.

[0005] 2. Susceptible to interference: X-ray flaw detection needs to be carried out in a relatively good environment, otherwise it may be interfered by the outside world, affecting the accuracy of the flaw detection results. In addition, X-ray flaw detection also has certain requirements for factors such as the density and thickness of the object being tested. If it does not meet the standards, it will also affect the accuracy.

[0006] 3. Harsh testing conditions: To ensure that no accidents such as accidental exposure of personnel will occur during the testing, the testing area must be isolated and personnel must be cleared during the testing period. Personnel must also be arranged to guard the border. If a person accidentally enters the border, the testing must be terminated immediately. Summary of the invention

[0007] The purpose of the present invention is to provide a self-shielded gamma-ray detection device, which can not only maintain the penetration of gamma-ray monitoring, but also meet the radiation hazard management regulations of the work site, and is not restricted by distance or clearance control measures, so that gamma-ray detection activities can be carried out at any time.

[0008] The technical solution of the present invention is as follows: a self-shielded gamma-ray detection device, the gamma-ray detection device comprising: a source box container base, the source box container base is fixed on the ground or a movable platform, and can be placed in or integrated with a flaw detector body;

[0009] A shielding chamber that can be opened and closed to test devices, containers or pipelines; when used to test pipeline welds, the shielding chamber can be equipped with a flexible lead shielding device with a telescopic function at any one or more edges to allow the pipeline to pass through the middle of the shielding chamber;

[0010] A mechanical arm base, the mechanical arm base is rotatably mounted in the middle of the surface of the source box container base;

[0011] A supporting mechanical arm, the supporting mechanical arm is installed above the mechanical arm base and can rotate with the mechanical arm base; the supporting mechanical arm can lift the shielding cabin to a specific position and realize the free rotation of the shielding cabin; a fixed source whip tube is installed inside the supporting mechanical arm; and

[0012] A source transmission tube, which can transmit the gamma rays generated by the device; the outside of the source transmission tube is wrapped with the fixed source whip tube that runs through the inside of the supporting mechanical arm.

[0013] Furthermore, the supporting mechanical arm comprises a primary mechanical arm and a secondary mechanical arm, which are rotationally connected to each other.

[0014] Furthermore, the bottom end of the secondary robotic arm is rotatably mounted above the robotic arm base, and is driven to rotate by a motor inside the source box container base, and the top end thereof is rotatably connected to the primary robotic arm.

[0015] Furthermore, one end of the primary robotic arm is rotatably connected to the secondary robotic arm, and the outer side surface of the other end is rotatably mounted on the shielding compartment through a universal adjustment structure.

[0016] Furthermore, the shielding chamber is a cubic structure with a size of 120×120×120cm 3 ; Lead plate is used as the shielding material, and the thickness of the lead plate is 71mm.

[0017] Furthermore, a radiation source positioning device and a film cassette holder rotating device are provided in the shielding chamber, which can realize synchronous rotation of the radiation source and the film cassette holder by 60°, 120°, and 180°.

[0018] Furthermore, the specification of the flexible lead shielding material is It has a free telescopic function and can fit the pipe or container passing through the shielding chamber to prevent gamma ray scattering during operation.

[0019] Furthermore, a control component of the flaw detection device is installed inside the source box container base, and the control component can be turned on and generate gamma rays.

[0020] Furthermore, the bottom end of the fixed source whip tube is connected to the control component inside the source box container base; the source transmission tube wrapped inside the fixed source whip tube can transmit the gamma rays generated by the control component and has a shielding function to prevent the gamma rays from spreading.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. The design of shielding chamber with shielding function and fixed source side tube makes it unnecessary to clear the site and close the management during the flaw detection process using gamma rays, thereby greatly improving the work efficiency of the overall detection process, while not affecting the normal work of other staff in the factory and avoiding wasting the staff's time.

[0023] 2. The design of the flexible lead shielding device on the shielding chamber can achieve better fit and coverage between the outer wall of the shielding chamber and the walls of the pipeline and container when the equipment is inspecting the pipeline and container, reducing the hidden danger of γ-ray scattering and ensuring that no personnel will be accidentally exposed during X-ray flaw detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of a flexible lead shielding device in a shielded gamma-ray detection device provided by the present invention;

[0025] Figure 2 This is a schematic structural diagram of a shielded gamma-ray detection device provided by the present invention;

[0026] In the figure: 1. Source box container base; 2. Fixed source whip tube; 3. Robotic arm lifting shielding cabin; 4. Robotic arm base; 5. First-level robotic arm; 6. Second-level robotic arm. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-Figure 2 As shown, a shielded gamma-ray detection device comprises a source box container base 1, which is fixed on the ground or a movable platform and can be placed in or integrated with a flaw detector body; a shielding chamber 3, which can be opened and closed to test devices, containers or pipelines; when used to test pipeline welds, the shielding chamber 3 can be equipped with a flexible lead shielding device with a telescopic function at any one or more edges, so that the pipeline passes through the middle of the shielding chamber 3; a mechanical arm base 4, which is rotatably installed in the middle position of the surface of the source box container base 1; a supporting mechanical arm, which is installed above the mechanical arm base 4 and can rotate with the mechanical arm base 4; the supporting mechanical arm can lift the shielding chamber 3 to a specific position and realize the free rotation of the shielding chamber 3; a fixed source whip tube 2 is installed inside the supporting mechanical arm; and a source transmission tube, which can transmit the gamma rays generated by the equipment; the fixed source whip tube 2 that runs through the inside of the supporting mechanical arm is wrapped on the outside of the source transmission tube.

[0029] The supporting robot arm includes a primary robot arm 5 and a secondary robot arm 6, which are rotatably connected. The bottom end of the secondary robot arm 6 is rotatably mounted above the robot arm base 4, and is driven to rotate by the motor inside the source box container base 1, and the top end is rotatably connected to the primary robot arm 5. One end of the primary robot arm 5 is rotatably connected to the secondary robot arm 6, and the outer side surface of the other end is rotatably mounted on the shielding chamber 3 through a universal adjustment structure. The shielding chamber 3 is a cubic structure with dimensions of 120×120×120cm 3 Lead plate is used as shielding material, and the thickness of the lead plate is 71mm. The shielding chamber 3 is provided with a radiation source positioning device and a film cassette holder rotating device, which can realize 60°, 120°, and 180° synchronous rotation of the radiation source and the film cassette holder. The specification of the flexible lead shielding material is It has a free telescopic function and can fit the pipe or container passing through the shielding chamber 3 to prevent radiation scattering during operation. The control component of the flaw detection device is installed inside the source box container base 1, and the control component can be turned on and generate gamma rays. The bottom end of the fixed source whip tube 2 is connected to the control component inside the source box container base; the source transmission tube wrapped inside the fixed source whip tube 2 can transmit the gamma rays generated by the control component, and has a shielding function to prevent the diffusion of gamma rays.

[0030] The implementation principle of a convenient disassembly and assembly guide wheel device of this embodiment is as follows: when using the device for radiation detection, first use the rotation of the first-level mechanical arm 5 and the second-level mechanical arm 6 to move the lifting shielding chamber 3 to a suitable height, and then place the device to be tested into the shielding chamber 3 or use a flexible lead shielding device to clamp the pipeline to be tested in the middle of the shielding chamber 3, and then use a switch to turn on the control component inside the source box container base 1 to turn on and generate corresponding gamma rays. The generated gamma rays are transmitted through the source tube in the fixed source whip tube 2. During the transmission process, the external shielding sleeve is used for certain shielding. The gamma rays transmitted in the source tube are finally shot into the lifting shielding chamber 3 to perform flaw detection on the device to be tested.

[0031] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “left end”, “right end”, “above”, “below”, “outside”, and “inside” are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] Furthermore, the terms “first”, “second”, and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0033] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A gamma ray detection device with self-shielding, characterized in that: The device includes: A source box container base (1), wherein the source box container base (1) is fixed on the ground or a movable platform and can be placed in or integrated with a flaw detector body; A shielding chamber (3) which can be opened and closed to test a device, a container or a pipeline; when used to test a pipeline weld, the shielding chamber (3) can be equipped with a flexible lead shielding device with a telescopic function at any one or more edges to allow the pipeline to pass through the middle of the shielding chamber (3); A mechanical arm base (4), the mechanical arm base (4) being rotatably mounted at a middle position on the surface of the source box container base (1); A supporting mechanical arm, the supporting mechanical arm being installed above the mechanical arm base (4) and being capable of rotating with the mechanical arm base (4); the supporting mechanical arm being capable of lifting the shielding chamber (3) to a specific position and enabling the shielding chamber (3) to rotate freely; a fixed source whip tube (2) being installed through the interior of the supporting mechanical arm; and A source delivery tube, wherein the source delivery tube can transmit the gamma rays generated by the device; the outer side of the source delivery tube is wrapped with the fixed source whip tube (2) which runs through the interior of the supporting mechanical arm.

2. A self-shielded gamma-ray detection device according to claim 1, characterized in that: The supporting mechanical arm comprises a primary mechanical arm (5) and a secondary mechanical arm (6), which are rotationally connected.

3. The self-shielded gamma-ray detection device according to claim 1, characterized in that: The bottom end of the secondary robot arm (6) is rotatably mounted above the robot arm base (4), driven to rotate by a motor inside the source box container base (1), and the top end is rotatably connected to the primary robot arm (5).

4. The self-shielded gamma-ray detection device according to claim 1, characterized in that: One end of the primary mechanical arm (5) is rotatably connected to the secondary mechanical arm (6), and the outer side surface of the other end is rotatably mounted on the shielding chamber (3) via a universal adjustment structure.

5. The self-shielded gamma-ray detection device according to claim 1, characterized in that: The shielding chamber (3) is a cubic structure with dimensions of 120×120×120 cm. 3 ; Lead plate is used as the shielding material, and the thickness of the lead plate is 71mm.

6. A self-shielded gamma-ray detection device according to claim 5, characterized in that: The shielding chamber (3) is provided with a radiation source positioning device and a film cassette holder rotating device, which can realize synchronous rotation of the radiation source and the film cassette holder by 60°, 120°, and 180°.

7. The self-shielded gamma-ray detection device according to claim 1, characterized in that: The specifications of the flexible lead shielding material are It has a free telescopic function and can fit the pipe or container passing through the shielding chamber (3) to prevent radiation scattering during operation.

8. The self-shielded gamma-ray detection device according to claim 1, characterized in that: A control component of a flaw detection device is installed inside the source box container base (1), and the control component can be turned on and generate gamma rays.

9. The self-shielded gamma ray detection device according to claim 1, characterized in that: The bottom end of the fixed source whip tube (2) is connected to the control component inside the source box container base; the source transmission tube wrapped inside the fixed source whip tube (2) can transmit the gamma rays generated by the control component and has a shielding function, which can prevent the gamma rays from spreading.

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