44 results about "Radiation Leak" patented technology

The invention discloses a blood volume detection device and method based on a brain angiography image, and relates to the technical field of blood volume detection of the brain angiography image, the blood volume detection device comprises a detection device body and a substrate, the top surface of the substrate is fixedly provided with a lifting platform, and the surface of the top end of the lifting platform is fixedly provided with a workbench; and the linear motor is installed in the middle of the top face of the workbench, and a movable bed plate is horizontally and fixedly installed on the movable end face of the top of the linear motor. According to the blood volume detection device and method based on the brain angiography image, displacement compensation closed-loop control is achieved through the fine adjustment feedback module of the adjusting mechanism, and the gear meshing clearance compensation error is reduced; the LSTM network and the hybrid FEM-LBM algorithm are cooperatively optimized, the blood flow calculation speed is multiplied, an isolation telescopic sleeve shell and a shielding plate are arranged to form a composite shielding layer, the radiation leakage amount is reduced, the radiation monitoring module achieves real-time alarm of dose exceeding, and the protection level is improved.

The invention discloses a diagnosis and measurement system for an electromagnetic compatibility experiment and a matched rectification system. The diagnosis and measurement system comprises a broadband LISN, a difference and common mode interference separation module, a radiation emission interference positioning module, ultra-wideband current calipers, a system power supply line rectification assembly and a system internal interconnection cable rectification assembly. The system provides stable impedance through a broadband LISN, samples high-frequency and low-frequency interference signals by using a difference and common mode interference separation module and a current caliper, and separates a difference mode component from a common mode component. And the radiated emission interference positioning module detects equipment radiation leakage points and generates a shielding effectiveness report. The rectification assembly quickly solves the electromagnetic compatibility problem of the equipment, and ensures that the test standard is met. The system realizes efficient and accurate electromagnetic interference detection and rectification.

The invention discloses a modular hot cell, and relates to the technical field of radiation experiments. The hot cell comprises: a base; a shielding body, wherein the shielding body is arranged on the base; the shielding body is arranged on the base, the shell is arranged on the base, and the shell is located in the shielding body; part of the passing assembly is arranged on the shielding body, and part of the passing assembly is arranged on the shell; a part of the observation assembly is arranged on the shielding body, and a part of the observation assembly is arranged on the shell. According to the modularized hot chamber, through the modularized splicing structure of the base, the shielding body and the shell, the construction efficiency of the hot chamber is remarkably improved, the nested design of the shielding body and the shell forms a multiple radiation protection barrier, and the radiation leakage amount is controlled to be at an extremely low level while the operation visibility of personnel is guaranteed. According to the invention, a user can inspect the damaged fuel element at the first time, and the efficiency and reliability of fuel element damage inspection and analysis are improved.

The utility model relates to the field of injection devices, in particular to a radiopharmaceutical injection device. The device comprises an injector a, an injector b, a three-way plug valve, an extension tube, a balloon, a control switch and a suction nozzle, the three-way plug valve is provided with an input end A, an input end B and an output end C; the liquid outlet end of the injector a is communicated with the input end B of the three-way plug valve; the liquid outlet end of the injector b is communicated with the input end A of the three-way plug valve; one end of the extension tube is communicated with the output end C of the three-way plug valve, the other end of the extension tube is communicated with the suction nozzle, the extension tube is communicated with the balloon, and the control switch is arranged between the balloon and the suction nozzle and controls on-off of the extension tube. According to the utility model, the iodine 131 medicine is firstly injected into the saccule, after a patient drinks up, saline water is injected into the saccule, and after the patient drinks up the saline water after tube washing, closed administration is realized, the medicine is prevented from being exposed and volatilized in the air, the medicine leakage is reduced, and the risk of radiation leakage is reduced.

The radiation protection head and neck sleeve convenient to wear comprises a head protection part, a neck protection part is integrally formed at the lower end of the head protection part, a neck opening extending to the head protection part is formed in the front side of the neck protection part, a zipper is arranged in the neck opening, and the neck protection part is connected with the head protection part. A face opening is formed in the surface of the front side of the head protection part, a face protection part is arranged in the face opening, the head protection part and the neck protection part are both made of flexible materials, the head protection part and the neck protection part are integrally formed, and the neck opening is combined with the convenient wearing and taking-off design of a zipper, so that the pillow is matched with the physiological structure of the head and the neck of a human body; the wearing efficiency is improved, the key areas of the head and the neck can be fully covered through the integrated structure, the radiation leakage risk is reduced, and the comprehensiveness of radiation protection and the wearing convenience are balanced.

The invention discloses an irradiation monitoring pipe multi-inlet multi-outlet transport container and an operation method thereof, the irradiation monitoring pipe multi-inlet multi-outlet transport container comprises a transport container body, a hollow isolation channel with two open ends is arranged in the transport container body, and a first shielding piece used for isolating radiation leakage is filled between the wall of the isolation channel and the inner wall of the transport container body; the rope hoisting mechanism is mounted on the transportation container body and penetrates through the inner top end of the isolation channel; the interior of the hanging basket is hollow, the top of the hanging basket is open, the top of the hanging basket is hung in the isolation channel through a rope hoisting mechanism, the upper end cover is installed in the opening in the top of the isolation channel, and a sealed space is formed by the transportation container body; through the upper end cover or the shielding door, upper-inlet-upper-outlet, upper-inlet-lower-outlet, lower-inlet-upper-outlet and lower-inlet-lower-outlet of the irradiation monitoring pipe are achieved, the problem that an existing irradiation monitoring pipe transportation container is single in inlet and outlet mode is solved, and the irradiation monitoring pipe transportation container can adapt to irradiation monitoring pipe transportation under different scene requirements.

The invention relates to an oven door (1) for a domestic oven (2) having a microwave heating function for heating comestibles in a cavity (3), the oven door (1) comprising at least the following components: - at least two structural columns (9,10) for holding at least one glass pane (11,12,13) and having a joint connection (15) for moving the oven door (1) relative to a cavity assembly (8); - a microwave shutter (16) for trapping microwave radiation leaking from the cavity (3) of the cavity assembly (8), the microwave shutter (16) including a guard plate (17) and a locking plate (18) forming a trap opening (19) around the front opening (4) when closed; and - a cavity-side cover element (20) holding an innermost glass pane (14), the cover element (20) being configured to form a trim surface and a gasketing contact for closing the front opening (4) of the cavity assembly (8). The oven door (1) is particularly characterized in that the cover element (20) has at least one groove (21) with which, in that state closing the front opening (4), the gasketing contact is formed and which is formed recessed from the front side (7) of the cavity assembly (8). The invention further relates to a domestic oven (2) with microwave heating function for heating comestibles. With the oven door proposed here, good sealing of the cavity can be achieved with low space requirements.

The utility model discloses a self-shielding neutron target device and a self-shielding neutron target system, the self-shielding neutron target device comprises a neutron target and a shielding housing, the neutron target comprises a target disc and a rotating part, the target disc is connected with the rotating part, the shielding housing is provided with a shielding chamber and a channel, the shielding chamber is used for packaging the target disc, and the rotating part passes through the channel. The shielding shell is further provided with a connecting end and an emitting end, the connecting end faces at least one part of the target disc, and the emitting end and the connecting end are located on the two opposite sides of the target disc. The shielding cavity can effectively package the target disc, generated neutrons and other radiation are limited in the shielding cavity, radiation leakage is avoided, the neutron target equipment is protected, operators can be prevented from being hurt by radiation, a channel for the rotating part to penetrate out is reserved in the shielding shell, and movement of the rotating part cannot be hindered while the sealing effect is achieved.

The invention relates to the technical field of radiation protection, and particularly discloses a lead-free ray protection plate partition wall which comprises a protection plate unit, and the protection plate unit comprises two outer display layers and a lining layer clamped between the two outer display layers; the top of the wall body is provided with a bendable top layer plate, and the adjacent protection plate units are connected through an outer side plate. According to the invention, the protective cover which can be detached in a segmented manner and the bendable top layer plate are arranged, and the extension blocks which can be flexibly adjusted are matched, so that the wall body can be smoothly bent at any radian and precisely shaped on site according to actual requirements; a traditional prefabricated right-angle component is completely replaced, the adaptability of the partition wall to complex and non-standard space layout is greatly improved, the risk of radiation leakage at the corner is fundamentally eliminated by forming continuous and seamless arc transition, and unification of the protection performance and the design freedom degree is achieved.

The utility model relates to the technical field of anti-radiation wallboards, and discloses an anti-radiation wallboard installation accessory which comprises a plurality of transverse installation assemblies, each transverse installation assembly comprises a transverse keel, a plurality of transverse pressing plates are detachably arranged on the transverse keels, a plurality of vertical installation assemblies are arranged between every two adjacent transverse keels, and the transverse pressing plates are detachably arranged on the vertical installation assemblies. The vertical mounting assembly comprises a vertical keel, and a plurality of vertical pressing plates are detachably arranged on the vertical keel; through cooperative use of the anti-radiation wall plate, the transverse mounting assembly, the vertical mounting assembly, the bolts and the positioning holes, the transverse pressing plate and the vertical pressing plate are fixed to the vertical keel through the bolts, and a rectangular limiting frame fixed in a lossless mode is formed. The transverse keels and the vertical keels adopt the E-shaped middle thickening design, enough screwing depth is provided, the keels do not need to penetrate through, the staggered design of mounting point position holes is ensured, radiation leakage is prevented, and the effects of being good in protection performance and convenient and fast to mount are achieved.

The invention relates to a linear accelerator machine room wall air pipe inner and outer supporting device and a construction method thereof. The device comprises an inner supporting device and an outer supporting device. The inner supporting device comprises a corner supporting seat and an inner supporting frame; the corner supporting seats are fixed to the four corners of the air pipe correspondingly, and the inner supporting frames are correspondingly connected to the interiors of the corner supporting seats, so that an inner support is formed in the air pipe. The outer supporting device comprises an upper supporting steel reinforcement framework and a lower supporting steel reinforcement framework, and mounting plates are arranged at the two ends of the air pipe and used for assembling blind plates so as to seal the two ends of the air pipe after filling materials are injected into the air pipe. The risk of radiation leakage is remarkably reduced through the streamline air pipe design, the structural stability is enhanced in combination with a dual-supporting system, and through the telescopic inner supporting structure, the device can easily adapt to narrow or bent space, rapid and accurate installation is achieved, and the construction efficiency and quality are greatly improved.

The invention discloses a multi-sample storage device of a pneumatic conveying system. The multi-sample storage device solves the problems that an existing irradiated sample box storage device cannot automatically store a plurality of irradiated sample boxes at the same time, and specific samples can not be taken out according to actual requirements. Comprising a lead tank, a containing cavity is formed in the lead tank, a storage shell is arranged, and a fixing support is located in the storage shell. The output end of the rotation driving mechanism is connected to the fixing support and can drive the fixing support to rotate. The storage barrels are arranged on the fixing support around the rotating axis of the fixing support in a circular array mode. The distance between the axis of the sample injection channel and the axis of the fixing support is equal to the distance between the axis of each storage cylinder and the rotation axis of the fixing support. The multi-sample storage device can store a plurality of sample boxes and can prevent radiation leakage.

The application discloses a fixed telephone network transmission system based on quantum security enhancement, which comprises a plurality of local telephone networks, each of which has a local terminal device, and the local telephone networks are connected through the local terminal devices; each local terminal device is connected with one or more intermediate devices, each intermediate device is connected with a plurality of terminal devices, one terminal device is connected with one telephone set, and the system has an end-to-end security enhancement mechanism, which can provide security protection for the transmission channel between the local telephone switching system and the telephone set, applies quantum random numbers to the wired telephone communication system, adopts a negotiation distribution mechanism of "one-time security transmission protection one-time conversation", enhances the security and privacy ability of the last kilometer of telephone communication, makes up for the lack of identity authentication of the traditional telephone switching network, greatly reduces the security risks such as tampering and imitating attack of the telephone terminal, conduction leakage, radiation leakage, tone leakage and lapping eavesdropping and the like.

The invention relates to the field of nuclear power stations, in particular to a nuclear power robot decision-making and control system and method, and the system comprises a control cabinet, an operator station and an engineer station. The system is used for controlling at least one nuclear power robot. The method comprises the steps that the position and radiation data of the robot are acquired in real time through the wireless communication module, the robot is guided to move according to a preset inspection path, and whether radiation leakage occurs or not is judged in combination with multi-source nuclide data. Once leakage is detected, the system starts a hot spot tracking process, automatically plans an optimal path and instructs the robot to execute radiation dose sampling; according to the invention, the plurality of nuclear power robots and the DCS system are integrated through the wireless communication module, and information sharing and collaborative operation among the plurality of nuclear power robots are realized, so that the inspection efficiency is improved, the information island phenomenon is avoided, and the robots can work in a coordinated manner and do not interfere with one another.

The invention discloses a protective device in radiopharmaceutical transportation. The protective device comprises an outer frame, an inner frame and a sealing cover, a plurality of connecting rods are fixedly connected between the circumferential inner wall of the outer frame and the circumferential outer wall of the inner frame, a plurality of fixing rods are fixedly connected between the bottom inner wall of the outer frame and the bottom outer wall of the inner frame, a first solution cavity is formed between the circumferential outer wall of the outer frame and the circumferential outer wall of the inner frame, and the bottom of the sealing cover is in threaded connection with the top ends of the outer frame and the inner frame. Sealing rings are fixedly mounted at the top ends of the outer frame and the inner frame; an annular first solution cavity between an outer frame and an inner frame and a second solution cavity in a sealing cover are communicated through a through groove in the bottom of the sealing cover to form a three-dimensional liquid protective layer surrounding the inner frame, so that a protective solution can wrap the inner frame loaded with radiopharmaceuticals from the side wall and the top in all directions, and the radiopharmaceuticals are protected from being damaged. A continuous and homogeneous shielding barrier is formed, and the risk of radiation leakage caused by splicing gaps of a traditional solid shielding material is avoided.

A thermal radiation shield interface for cryogenic systems includes a first element with a distal, free end. Flanges project from the distal, free end of the first element. A second element also includes a distal, free end. Flanges project from the distal, free end of the second element. The flanges of the first element and the flanges of the second element are positioned in an interleaved arrangement to cover an opening between the first element and the second element shielding the opening from radiation leakage.

The invention relates to a fastening device. The fastening device comprises a first fastening piece, a second fastening piece and a connecting piece, the first fastening piece and the second fastening piece are used for being inserted into holes in an anti-radiation wall body so as to fix an object; wherein the connecting piece is connected with the first fastening piece and the second fastening piece in a manner that a gap is formed between the first fastening piece and the second fastening piece; the space at the interval is used for being filled with anti-radiation materials so as to prevent radiation from penetrating through holes in the wall body. Compared with the prior art, the first fastening piece and the second fastening piece penetrate through the holes in the wall body to fix objects on the wall, the first fastening piece and the second fastening piece are connected through the connecting piece, the interval is reserved between the first fastening piece and the second fastening piece, and after concrete is poured, the interval is filled with the concrete body, so that the objects on the wall are fixed. Radiation can be absorbed and blocked by the concrete body in the interval in the process that the first fastener transmits towards the second fastener or the opposite direction of the first fastener, and then radiation leakage at the hole of the wall body is reduced.

The utility model relates to the field of pressure release valves, and discloses an anti-radiation pressure release valve which comprises an anti-radiation pipeline, one end of the anti-radiation pipeline extends out of a room and is provided with a pressure release component, the pressure release component is used for releasing pressure when air pressure exceeds a set value, and an anti-radiation component is arranged in the anti-radiation pipeline. The anti-radiation component is used for preventing radiation leakage during pressure relief, the anti-radiation component comprises a plurality of protection assemblies distributed in the extending direction of the anti-radiation pipeline in an array mode, and each protection assembly comprises a first protection plate and a second protection plate which are arranged in the anti-radiation pipeline. The outer surface of the first protection plate or the second protection plate is in sealing fit with the pipe wall of the anti-radiation pipeline, a plurality of first air holes are formed in the first protection plate in an array mode, a plurality of second air holes are formed in the second protection plate in an array mode, and the first air holes and the second air holes are staggered.

The invention discloses a radioactive particle protection implanting device for tumor treatment. The radioactive particle protection implanting device comprises an implanting gun body, a puncture needle, a loading assembly and a push rod matched with the puncture needle. The loading assembly is detachably installed on the surface of the implantation gun body, a bullet loading box and a rotatable rotating wheel are arranged in the loading assembly, a loading groove is formed in the periphery of the rotating wheel, and through holes are formed in the surface of the shielding protection plate and used for achieving one-by-one alignment and shielding protection of radioactive particles. A trigger, a fixed assisting block, a movable assisting block, an elastic piece and an engaging lug are arranged in the implantation gun body, the push rod is driven to linearly advance through the connecting rod and the sliding lug, one-way limiting is achieved under the clamping action of the engaging lug, and reverse sliding of the push rod is prevented. The guide cylinder is used for guiding the push rod to enter the puncture needle and accurately implanting particles into tumor tissue. The device is provided with a rotary missile cabin type protection structure, an anti-non-return gun type propelling structure and a detachable modular loading assembly, radiation leakage can be effectively avoided, it is guaranteed that particle implantation is accurate and reliable, replacement is rapid, and the device has high clinical application value.

To prevent radiation leaking from shielding measures from reaching specific areas. [Solution] The electron beam irradiation device (100) comprises an electron beam generator (4) that generates an electron beam, a transport cylinder (5) that transports the paper (P) so that it passes through the irradiation area (IR) irradiated by the electron beam by holding and rotating a part of the paper (P) to be irradiated by the electron beam, a shielding structure (8) provided around the irradiation area (IR) in the transport cylinder (5) to shield the radiation, and a guide structure (10) that guides the radiation leaked from the end of the shielding structure (8) in a specified direction.

The invention relates to a convex-concave type construction joint special for a linear accelerator machine room, a construction method of the convex-concave type construction joint and the machine room. The convex-concave type construction joint comprises a lower side wall body and an upper side wall body, the top face of the lower side wall body upwards forms a convex structure in the self direction, and the upper side wall body is poured above the lower side wall body; a concave structure embedded with the convex structure is formed on the bottom surface of the upper side wall body; one of the water stop baffle and the anti-radiation baffle is arranged on the inner side of the protruding structure, the other one is arranged on the outer side of the protruding structure, the lower ends of the water stop baffle and the anti-radiation baffle are both inserted into the lower side wall body, and the upper ends of the water stop baffle and the anti-radiation baffle are both inserted into the upper side wall body. By means of the convex-concave type construction joints and the water stop steel plates, the water seepage path is lengthened, and the anti-seepage capacity of the wall is improved; the risk of radiation leakage is isolated through the convex-concave construction joints and the anti-radiation lead plates, investment of a formwork supporting system during overall pouring is saved, and meanwhile overall safety is guaranteed.

1. The name of the design product: radiation leakage test tool. 2. The use of the design product: for testing the radiation leakage of X-ray detection device. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to after-loading radiotherapy equipment. The after-loading radiotherapy equipment comprises an after-loading radiotherapy device which is used for conveying a stored radioactive source into the body of a target object; the radiotherapy bed comprises a bed plate used for supporting a target object; and the shielding structure is used for sealing the afterloading radiotherapy device and the bed plate in the internal space of the shielding structure so as to prevent radiation of the radioactive source from leaking to the outside. Therefore, the after-loading radiotherapy equipment can be deployed in a small or non-fixed site, and can be quickly deployed.

The invention relates to the technical field of anti-radiation nails for radiation protection, and particularly discloses a special-shaped material-saving anti-radiation nail and an anti-radiation method thereof.The special-shaped material-saving anti-radiation nail comprises a nail body and a protective nail cap, one end of the nail body is arranged to be a sharp end, the protective nail cap is fixed to the other end of the nail body, and the protective nail cap is of a multi-layer structure; comprising an outer layer, an anti-radiation layer and an inner layer, the inner layer is fixed to a nail body, the anti-radiation layer is located between the inner layer and the outer layer, and the outer layer, the anti-radiation layer and the inner layer are fixedly connected. The special-shaped material-saving anti-radiation nail provided by the invention not only can effectively reduce radiation leakage, but also can provide an excellent reinforcing and fixing function, and meanwhile, can also save the use of anti-radiation materials. By means of the mode of being embedded into the wall body or the protection plate, radiation leakage can be effectively prevented, meanwhile, use of protection materials is reduced, the protection effect is improved, protection construction is simplified, and the fixing strength of the protection plate is enhanced.

The invention discloses fault disinfection and preservation equipment and method applied to a customs cold chain, and belongs to the field of customs cold chain food treatment. According to the technology, geometric and internal density characteristics of food are accurately obtained through an AI visual identification unit of laser three-dimensional modeling and X-ray density imaging; the AI system dynamically regulates and controls double electron beam parameters (the power is 5-12MeV, and the beam intensity is 1-5mA) and the speed of a conveyor belt based on deep learning and a Monte Carlo algorithm; the double electron beams adopt a 180-degree opposite emission layout with the distance larger than 10 meters, each emitter is provided with an independent protection fortress, energy is superposed in the food center to achieve deep disinfection of 20-40 cm, and the dose uniformity error is smaller than 5%. The treatment efficiency of the equipment reaches 20 tons / hour, the radiation leakage is less than 0.5 mu Sv / h, the preservation time of fruits is more than 3 months, the preservation time of vacuum low-temperature beef is more than 6 months, the equipment is adaptive to the'instant inspection and release 'process of customs, the problems of incomplete disinfection, short preservation time and low efficiency in the traditional technology are solved, and the equipment is suitable for cross-border cold chain large-scale treatment.

The invention relates to an oven door (1) for a domestic oven (2) having a microwave heating function for heating comestibles in a cavity (3), the oven door (1) comprising at least the following components: - at least two structural columns (9,10) for holding at least one glass pane (11,12,13) and having a joint connection (15) for moving the oven door (1) relative to a cavity assembly (8); - a microwave shutter (16) for trapping microwave radiation leaking from the cavity (3) of the cavity assembly (8), the microwave shutter (16) including a guard plate (17) and a locking plate (18) forming a trap opening (19) around the front opening (4) when closed; and - a cavity-side cover element (20) holding an innermost glass pane (14), the cover element (20) being configured to form a trim surface and a gasketing contact for closing the front opening (4) of the cavity assembly (8). The oven door (1) is particularly characterized in that the cover element (20) has at least one groove (21) with which, in that state closing the front opening (4), the gasketing contact is formed and which is formed recessed from the front side (7) of the cavity assembly (8). The invention further relates to a domestic oven (2) with microwave heating function for heating comestibles. With the oven door proposed here, good sealing of the cavity can be achieved with low space requirements.

The utility model discloses a sealing device for irradiation modification of high polymer materials, belongs to the technical field of irradiation processing equipment, and aims to solve the problems that in the prior art, the sealing performance between a bearing box and a box body is poor, and radiation leakage is easily caused. A sealing box matched with the bearing box is clamped in the base, the outer wall of the sealing box is attached to the inner wall of the base, and a first sealing ring matched with the bearing box is fixed to the top face of the bearing box; the bearing box and the sealing box are covered, then the first sealing ring and the second sealing ring are matched with each other, the sealing performance between the bearing box and the sealing box is improved, and finally downward pressure is applied to the sealing box through the arrangement of the abutting mechanism, so that the first sealing ring and the second sealing ring are attached more tightly, and the sealing effect is better. And therefore, the sealing performance between the bearing box and the sealing box is further improved, and meanwhile operation of workers is facilitated.

The utility model relates to the field of radiation protection equipment, and discloses a radiation protection shielding door opening and closing mechanism which comprises a left wall, a door top plate is fixedly connected to the top of the left side wall of the left wall, a right wall is fixedly connected to the left side wall of the door top plate, and opening and closing mechanisms are arranged in the door top plate and the left wall. The switch mechanism comprises a supporting plate, a motor, a fixing plate and a limiting box. According to the utility model, through the arrangement of the switch mechanism, the problems that the radiation protection effect is influenced and the risk of radiation leakage is increased due to the fact that the convenience and efficiency of operation are influenced and the door is not closed or opened correctly can be solved, and the rack and the fixed plate are driven to slide in the door top plate, the left wall and the right wall, so that the radiation protection effect is improved. Therefore, it is effectively guaranteed that the door is completely sealed when closed, the door can be rapidly and accurately opened or closed when needed, and the risk of radiation leakage is reduced to the maximum extent.

The utility model discloses an easy-to-install radiation shielding device for a pipeline tee joint, which is provided with a hollow cavity matched with the pipeline tee joint, is provided with three pipe orifices corresponding to the pipeline tee joint in position, and comprises a first shielding piece and a second shielding piece which are oppositely arranged, the first shielding piece and the second shielding piece are hinged and can be opened through relative rotation or locked after being butted; the first shielding piece and the second shielding piece are both of a layered structure and comprise a protective layer, a reinforcing layer and a shielding layer which are sequentially arranged from outside to inside. According to the radiation shielding device for the pipeline three-way joint, the shielding device is more attached to the three-way pipe fitting, the sealing performance of the interface is better, mounting and dismounting are more convenient, and the risk of radiation leakage is reduced.