36results about How to "Prevent Radiation Leakage" patented technology

The invention discloses a shield protection sliding door which comprises door leaves, a door frame and a driving device for driving the door leaves to move. The driving device comprises a motor driving mechanism and a manual driving mechanism. According to the shield protection sliding door, the manual driving mechanism is provided for preventing accidents and works through chain wheel torque transmitting and a labor-saving structure of a hand wheel, and a chain wheel is directly connected with a motor; and when a manual part is not needed to work, the hand wheel is prevented from rotating, and the hand wheel and a shaft are designed into a detachable mode. According to the shield protection sliding door, through effective combination of motor driving and manual driving, the safety of thesliding door is ensured, and occurrence of the accidents is effectively prevented.

An ultra-high frequency digital communication cable, comprising a cable core, a total shielding layer (6), an outer protection layer (7) and branch shielding layers (4) on twisted pair wire groups (3), wherein overlapping sides of the branch shielding layers (4) are clamped between two adjacent insulated single wires to form a branch shielding overlapping wire (8); the branch shielding overlapping wires (8) corresponding to two adjacent pairs of twisted pair wire groups (3) are arranged in a staggered manner; and the length for overlapping, outward-stretching sides of the branch shielding layers (4) to extend outwards from the branch shielding overlapping wires (8) is L1, L1 being 10%-15% of the width of a clad foil band of the branch shielding layers (4). The preparation method comprises the following steps: (1), drawing a copper conductor (1); (2), extruding an insulation layer; (3), twisting twisted pair wire groups (3); (4), cladding branch shielding layers (4); (5), twisting same into a cable; (6), weaving a total shielding layer (6); and (7), extruding an outer protection layer (7) into a finished cable. The communication cable not only has a good shielding effect and can effectively prevent intrusion and leakage of an electromagnetic wave, but also has a firm cable structure and stable transmission performance, and is particularly applicable to transmitting an ultra-high frequency band digital signal.

The invention discloses a substrate integrated waveguide bandpass filter. It includes a first metal layer, a dielectric layer and a second metal layer stacked from top to bottom; the above-mentioned first metal layer includes a first transmission line main line, a second transmission main line, a first gradual transition line, a second gradual transition line and The first metal plate, the above-mentioned first metal plate includes a first strip-shaped opening, a second strip-shaped opening, a third strip-shaped opening, a fourth strip-shaped opening, a fifth strip-shaped opening, a first circular opening and a second circular opening; the dielectric layer includes a dielectric substrate, a first metallized through hole, a second metallized through hole, a first metallized groove, a second metallized groove, a third metallized groove, and a second metallized groove. For the fourth metallization slot and the fifth metallization slot, the above-mentioned second metal layer includes a dummy metal plate. The beneficial effect of the invention is that: the insertion loss caused by radiation is reduced, the limitation of processing technology is avoided, and the substrate integrated filter can be applied to high frequency band filtering.

The invention relates to a close range radioactive ray-induced cancer cell apoptosis model device and belongs to the technical field of biomedical experiment devices. The close range radioactive ray-induced cancer cell apoptosis model device has the advantages of simple structure, stability, reliability, good repeatability, use convenience and low cost. The device comprises a housing and a tray is arranged above the housing. The device is characterized in that particle clamps are radially arranged above the tray from the center to the periphery, a sleeve is arranged in the center in the housing corresponding to the lower part of the tray, an ejector rod is arranged in the sleeve, the upper end of the ejector rod corresponding to particles is radially provided with shield plates and an ejector rotation device is arranged at the lower end in the housing corresponding to the ejector rod.

The invention discloses an environmental protection device for eliminating radiation hazards of nuclear magnetic resonance to human body, which comprises a device body, conductive rubber and wire mesh, a top cover is arranged on the upper part of the device body, and a baffle is arranged on the side of the top cover , the end side of the baffle is provided with conductive rubber, the side of the device body is installed with a radiation detection instrument, the side of the radiation detection instrument is provided with an indicator light, and the side of the device body is provided with a through hole , the inside of the through hole is equipped with a wire mesh, the outside of the through hole is clamped with a block, the lower part of the through hole is provided with a filter, and the upper wall of the device body is coated with conductive paint. The invention detects the size of the radiation through the radiation detection instrument, and indicates it through the indicator light, and fully and effectively shields the through hole and the connection gap through the conductive rubber and the wire mesh, fully and effectively improves the shielding efficiency, and reduces the radiation received by the user damage.

The invention provides a temperature control station, which is used for the storage and temporary storage of vials in the preparation process of radiopharmaceuticals, and includes a stainless steel outer cylinder, a radiation shielding barrel, a station spring, a pillar, a heating and cooling module; a stainless steel outer cylinder cover It is located outside the radiation shielding barrel and the two can be slidably matched. The two telescopically store the vials, making the vials more convenient to take and place. In addition, the heating and cooling module can control the reaction and storage temperature according to the conditions of different drugs. Therefore, the temperature control station allows the dispensing equipment to prepare a wider range of drugs, and the equipment has good versatility.

The invention provides a totally closed alpha-energy spectrum measurement system. According to the measurement system, a sample treatment table, a special muffle furnace, an alpha sample vacuum chamber and a charge-sensitive preamplifier are arranged in a stainless steel glove box; a bias power supply, a computer and a data acquisition processor are arranged in another measurement operation room; information transmission between the bias power supply and data acquisition processor in the measurement operation room and the alpha sample vacuum chamber and the charge-sensitive preamplifier in the stainless steel glove box are achieved through cable connection. According to the totally closed alpha-energy spectrum measurement system, the operations of preparing, transferring and measuring samples are finished in a completely closed environment, and instrument control and data processing are operated remotely; shells and components of various parts in the glove box are made of high-performance and acid-corrosion-resistant materials, so that the service life is greatly prolonged. The totally closed alpha-energy spectrum measurement system is convenient to operate, low in noise and stable in performance and is suitable for alpha-energy spectrum measurement of highly toxic and highly radioactive special samples.

The invention belongs to the technical field of medical equipment, and particularly discloses a medical anti-radiation controllable isolation layer of the radiology department. The medical anti-radiation controllable isolation layer of the radiology department comprises a door plate, a pulling module, electromagnetic locks, a dimension detector and LED indicating lamps; a first groove are formed in a wall at the right side, the first groove is provided with the door plate, the right side of the door plate is provided with the pulling module, the pulling module is used for pulling the door plate, and by controlling the opening and closing of different doors, people with different body shapes can enter the department of the radiology department; a second groove is formed in a wall at the left side, the electromagnetic locks are installed in the second groove, and the electromagnetic locks can be used for sucking the door plate; and the outer surface of the door plate is provided with thedimension detector and the LED indicating lamps, the dimension detector is used for measuring the height and width of patients, when the door plate is closed, the LED indicator lamps lights to form astriking radiation sign, when the door plate is opened, an indicator lamp above the head of a patient lights to remind the patient to prevent head collision. The medical anti-radiation controllable isolation layer of the radiology department is mainly used for reducing the radiation to the outside when the department door of the radiology department is opened.

The invention relates to a safety interlocking control system for a protective door of a hospital neutron irradiator. The safety interlocking control system comprises a control computer, an irradiation protective door state detection device, a neutron flux detection device and a reactor control bar driving device, wherein the irradiation protective door state detection device is related to the protective door of an irradiation room and is used for detecting the state of the protective door of the irradiation room; the neutron flux detection device is used for detecting the neutron flux in the irradiation room; and therefore, the irradiation leakage or mistaken irradiation for personnel caused by mistakenly opening of the protective door can be effectively prevented.