35results about How to "Good water tightness" patented technology

The invention relates to an underwater small radiation-resistant photographing device. A shell consists of a lens cap, a cylinder and a rear end cover; the lens cap is in force fit with a lead-containing radiation-resistant optical glass sheet and connected to one end of the cylinder through threads; the other end of the cylinder is in threaded connection with the rear end cover; the rear end cover is connected with a cable joint; the cable joint is connected with a cable; four light emitting diode (LED) illumination lamps are uniformly arranged around a camera; a first sealed chamber and a second sealed chamber which are respectively independent are arranged in the cylinder; the camera and the LED illumination lamps are arranged in the first sealed chamber, a circuit board is arranged in the second sealed chamber, and all joints are sealed by adopting O-shaped rings; and according to the radiation condition, a gamma or neutron radiation shielding module layer is arranged outside the shell, and a third sealed chamber is arranged in the gamma or neutron radiation shielding module layer. By integrated design of auxiliary illumination and the camera, installation and operation of a system are facilitated, the moving condition of an underwater refueling machine of a nuclear power plant in the water is learnt, and help is provided for underwater positioning of the refueling machine.

The invention discloses a floating water sealing coaxial electric connector comprising a connector shell provided with a cable incoming end and an inserting end. The connector shell comprises a fixed shell and a floating shell, wherein the floating shell is inserted into and matched with the fixed shell and is elastically matched with the fixed shell in a floating way through an elastic body which is axially arranged between the outer wall of the floating shell and the corresponding structure of the inner wall of the fixed shell; the position of the fixed shell, which is close to the cable incoming end, is provided with a containing space for installing an elastic glue cushion, and the elastic glue cushion is provided with an inner hole for a coaxial cable to penetrate through, an inner hole wall and an outer wall which are respectively sealed and matched with the coaxial cable and the fixed shell during axial compression; the floating shell is provided with a compression part which supports against and is axially matched with the elastic glue cushion when the floating shell moves towards the cable incoming end relative to the fixed shell; and the fixed shell is provided with a stop part matched with the elastic glue cushion in a limiting way and arranged opposite to the compression part. The floating water sealing coaxial electric connector ensures the good water sealing effect of the cable incoming end when the inserting end is inserted in a floating way.

A disclosed fireproof long-acting sealant is prepared from the following raw materials in parts by weight: 20-30 parts of butyl rubber, 15-25 parts of polyisobutylene, 17-21 parts of liquid polybutene, 7-10 parts of ebonite, 15-25 parts of triaryl phosphate, 13-16 parts of nanometer calcium carbonate, 18-24 parts of magnesium hydroxide, 3-6 parts of barium sulfate, 15-18 parts of aluminium hydroxide, 10-20 parts of rutile titanium dioxide, 7-14 parts of a phosphate fire retardant, 6-9 parts of diatomite and 12-16 parts of polyisobutylene. The provided fireproof long-acting sealant is good in sealing property, air impermeability, water sealing property, flexibility, beneficial for construction and installation, resistant to high and low temperature, and good in fireproof effect.

The invention discloses a combined rectangular municipal inspection well chamber prefabricating part, utilizing a base bottom module, a top cover module and a surrounding side trapezoidal module of an inspection well, which are formed by carrying out manually pasting, mold-compression-form, extrusion-form to glass fiber reinforced plastics, prefabrication to cements, or extrusion-mold, injection-mold, blow-mold, mold-pressing and extrusion molding on plastic raw materials. An inspection well chamber can perform long-distance transportation fast and can be recovered and reused in later period so as to save energy and protection environment. Inner walls of the bottom module, the top cover module and the surrounding side trapezoidal module are respectively provided with a reinforced structure, so that the inspection well has higher compressive strength. At the same time, a sewage soil precipitating tank is arranged in the middle of a pollution discharge surface of the base bottom module, so that soils and sands in sewages in the inspection well are precipitated into the sewage soil precipitating tank. The fabricated inspection well chamber has the advantages that the inspection well cannot leak; compressive strength is high; water seal performance is good; weight is light; corrosion resistance is good, repair and maintenance are quick and convenient; labor and time are saved; service life is long; the prefabricating part is convenient to produce by factories; and the inspection well chamber can be popularized and used generally.

The invention discloses a hydraulic fracture tester and a method for simulating a permeable liquid of a suddenly-heightened water head. The device is provided with a pressure chamber consists of a top cover, a cylinder and a base, wherein a cylindrical test piece is fixedly arranged on the base; a test piece axial force applying device is arranged on the top cover in a penetrating manner; two ends of a test piece are respectively connected with a water outlet pipe and a first water inlet pipe for providing fracture water pressure; the pressure chamber is connected with a second water inlet pipe for providing confining pressure; an impermeable membrane is spaced between the first water inlet pipe and the hole wall of a drilling test piece; resistance wires are attached to the impermeable membrane; an acoustic emission sensor is arranged on the cylinder. The method comprises the following steps: producing the test piece; setting up the tester; loading the test piece; analyzing a failure process, and the like. The invention fills up the blank of a hydraulic fracture failure testing device and the method for the permeable liquid of the sudden heightened water head, and provides test conditions for deeply researching a hydraulic fracture mechanism.

The invention discloses a water guide system for a garment steamer. The water guide system for the garment steamer comprises a heating device, a water supply device and a water guide mechanism arranged between the water supply device and the heating device. When the garment steamer is normally used in an upright state or inclines not above 90 degrees, water will not flow out of the garment steamer. The whole garment steamer has good water sealing performance, and cleaning trouble caused by water leakage is saved for users. Meanwhile, it is ensured that when a refrigerator is started, steam is generated within short time and persistently until water is used up. The invention further provides the garment steamer containing the water guide system.

The invention belongs to the field of unexploded ammunition destruction and particularly discloses a combined unexploded ammunition energy-gathered destruction device. The combined unexploded ammunition energy-gathered destruction device comprises an end cover, a shell, a main charge, a metal liner and a detachable head jet energy regulator. The end cover is located at the top of the shell and connected with the shell, the metal liner is arranged on the lower portion in the shell, the shell is loaded with the main charge, and the bottom of the main charge makes contact with the top of the metal liner. When an impact induced explosion mode is adopted to destroy unexploded ammunition, the head jet energy regulator is not arranged at the bottom of the shell, and when a deflagration disintegrating or ignition overburning mode is adopted to destroy the unexploded ammunition, the bottom of the shell is connected with the head jet energy regulator. The combined unexploded ammunition energy-gathered destruction device destroys the unexploded ammunition in situ in a contactless mode and can be used in a combined mode according to the type of the unexploded ammunition and the destruction environment conditions, and the disposal effect of impact induced explosion, deflagration disintegrating or ignition overburning on the exploded ammunition is achieved.

The invention discloses a core fixing cooling radiating system for a rotating shaft, which comprises the rotating shaft, cooling pipe components, a cooling connector component, inner ball-end set screws and O-shaped rings. Each cooling pipe component consists of a cooling pipe flange, a cooling pipe and shaft spacer sleeves, the cooling connector component comprises a flow distributing pipe flange, a red copper pipe, an elbow connection flow distributor, a water inlet pipe connector, a water outlet pipe connector, a large sealing ring and small sealing rings, the rotating shaft is sleeved on outsides of the cooling pipe components, the cooling connector component is sleeved inside the cooling pipe components, and connected with the cooling pipe connectors by internal threads of lower ports of the cooling pipe components, one end of each inner ball-end set screw is arranged in the rotating shaft, the other end of each inner ball-end set screw is disposed in an annular groove of the lower portion of the corresponding cooling pipe component, and the O-shaped rings are mounted in sealing grooves of the lower portions of the cooling pipe components and are arranged among the rotating shaft and the cooling pipe components. The core fixing cooling radiating system is compact in structure and fine in water sealing performance, cooling water can circulate in the rotating shaft in a heat field environment, the temperature of the shaft is reduced, and the service life of the rotating shaft is prolonged.

The invention discloses an artificial cerebral dura mater for tightly mending intraoperative dural injury; the inner surface of the artificial cerebral dura mater is in contact with cerebral tissues, is smooth and is not in adhesion with arachnoid and cerebral tissues; the outer surface of the artificial cerebral dura mater is provided with a plurality of loops (1) for surgical sewing. It is very convenient to perform sewing during surgery, sewing is easy, post-sewing watertightness is good, the artificial cerebral dura mater is simple to operate and is smooth after being fixed, and the watertightness problem of existing artificial cerebral dura mater in use is solved.

The invention discloses a fireproof watertightness type pre-branched magnesium oxide cable and an installation method thereof. The pre-branched magnesium oxide cable comprises a conductor connector and a protective jacket connector, wherein a main cable ingoing and inserting port is at one end of the conductor connector; a main cable outgoing and inserting port and a branch cable inserting port are at the other end of the conductor connector; the conductor connector is arranged in the protective jacket connector; a drum press fitting sheet and a compression nut are arranged at the main cable ingoing end of the protective jacket connector; a rear cover is arranged at the cable outgoing end of the protective jacket connector; a main cable outgoing end and a branch cable outgoing end are arranged on the rear cover; and both the main cable outgoing end and the branch cable outgoing end are provided with the drum press fitting sheet and the compression nut. The fireproof watertightness type pre-branched magnesium oxide cable and the installation method thereof provided by the invention have the characteristics of being good in watertightness, firmness and fireproofing, simple in structure and easy to install and use and the like; and the service life is over 100 years.

The invention discloses a machine and gate integrated gate in the field of gates. The gate comprises a gate body blocking a riverway, a bottom sill is arranged under the gate body, and gate grooves are formed in the two sides of the gate body. A cross beam is arranged on the landside of the gate body. Hydraulic oil cylinders are vertically arranged below the cross beam. Piston rods of the hydraulic oil cylinders extend out of the upper ends of the hydraulic oil cylinders. The upper end of the piston rod of each hydraulic oil cylinder is connected with a fixed support on the lower side of the cross beam through an upper pin shaft. The lower end of a cylinder body of each hydraulic oil cylinder is connected with a movable support through a lower pin shaft. A conical guide column is arranged at the lower end of each movable support. The bottom sill is provided with concave conical sleeves matched with the conical guide columns. The axis direction of the upper pin shafts is perpendicular to the water flow direction. The axis direction of the lower pin shafts is parallel to the water flow direction. The gate achieves machine and gate integration, and is stable in ascending and descending, convenient to open and close and convenient to maintain, and the number of auxiliary buildings is small.

The invention relates to a varied combined in-situ pot expanding planting container.The planting container comprises a base plate and flowerpot side walls.The base plate comprises a bottom face and a plurality of connecting walls arranged on the bottom face.The connecting walls are concentrically arranged, clearances are reserved between the adjacent connecting walls, and an external thread is arranged on the outer surface of each connecting wall.The number of the flowerpot side walls is equal to that of the connecting walls.A lower edge internal thread is arranged on the inner side of the lower edge of each flowerpot side wall, and an upper edge external thread is arranged on the outer side of the upper edge of each flowerpot side wall.Different flowerpot side walls are different in dimension, the lower edge internal thread of each flowerpot side wall can be connected with the external thread of the corresponding connecting wall on the base plate and can also be connected with the upper edge external threads of other flowerpot side walls, and the upper edge external thread of each flowerpot side wall can be connected with the lower edge internal threads of other flowerpot side walls.Compared with the prior art, the varied combined in-situ pot expanding planting container has the advantages of being simple in structure, high in operability, capable of being expanded many times, tight in combination, wide in application range and the like.

The invention discloses a door-in-door type gate and belongs to the field of gates. The door-in-door type gate comprises a gate body arranged on a watercourse in a blocking mode, wherein a bottom sill is arranged under the gate body, gate slots are formed in the two sides of the gate body, a cross beam is arranged on the land side of the gate body, and hydraulic cylinders used for lifting the gate body are uprightly arranged under the cross beam; a plurality of diversion pipes are arranged in the gate body at intervals, an electric control valve is connected to the lower ends of the diversion pipes, and an inlet of the electric control valve is located on the river side; an outlet in the upper end of each diversion pipe is located on the land side. The gate body can be lifted up or put down through the hydraulic cylinders to achieve water retaining and water discharging, the electric control valve can be opened when necessary to enable water to flow to the land side from the river side through the diversion pipes, and water sprayed from the land side can form a visual effect when certain fall exists. The gate is convenient to open and close, the number of auxiliary buildings is small, maintenance is convenient, and the visual effect is realized.

The invention discloses a cofferdam construction method combining film bag sand filling with a steel sheet pile. The cofferdam construction method comprises the steps of measurement and alignment, film bag positioning and laying, layer-by-layer film bag sand filling, muddy water discharging to enable a film bag sand cofferdam to precipitate, blow filling of closed sand between two layers of film bag sand, water pumping and drainage in a cofferdam foundation pit, steel sheet pile anti-seepage core wall construction and the like. According to the construction method, the film bag sand filling is combined with the steel sheet pile anti-seepage full-section cofferdam, the upper portion of the cofferdam is piled up with the film bag wrapped with sand soil, the lower portion of the cofferdam is anti-seepage through the steel sheet piles, the whole cofferdam becomes a whole, so that the cofferdam is high in integrity, good in self stability, high in adaptability to foundation, high in water pressure resistance and good in anti-seepage effect. The problem that the construction cofferdam is constructed under complex underwater geological conditions can be basically and effectively solved, the overall stability of a cofferdam structure is improved, and the cofferdam construction method has the advantages of being simple in process, fast in construction progress, low in cost and the like and has wide application prospects in the field of cofferdam construction of water conservancy projects.

The invention discloses a cold and hot mixed multifunctional water diverting shower head. The shower head comprises a shell, a cold and hot water mixing mechanism is arranged on the upper portion in the shell, and a water diverting mechanism is arranged on the lower portion in the shell, wherein the cold and hot water mixing mechanism comprises a cold and hot water pipe connecting piece arranged at the top of the inner side of the shell in a sleeved mode, a first water sealing static piece arranged at the bottom of the cold and hot water pipe connecting piece, a first water sealing movable piece arranged at the bottom of the first water sealing static piece, a rotating block connected with the bottom of the first water sealing movable piece, a first rotating piece arranged on the upper portion of the shell and rotationally connected with the shell and a first button switch connected with the first rotating piece, wherein the first button switch is rotationally connected to the shell, and the top of the first rotating piece is connected with the rotating block. The shower head has a cold and hot water mixing function, a water supply turning on and turning off function and a water diverting function at the same time, and is convenient to use, low in manufacturing cost, good in water diverting sealing performance, smooth in operation, firm and durable and long in service life.

The invention discloses a core fixing cooling radiating system for a rotating shaft, which comprises the rotating shaft, cooling pipe components, a cooling connector component, inner ball-end set screws and O-shaped rings. Each cooling pipe component consists of a cooling pipe flange, a cooling pipe and shaft spacer sleeves, the cooling connector component comprises a flow distributing pipe flange, a red copper pipe, an elbow connection flow distributor, a water inlet pipe connector, a water outlet pipe connector, a large sealing ring and small sealing rings, the rotating shaft is sleeved on outsides of the cooling pipe components, the cooling connector component is sleeved inside the cooling pipe components, and connected with the cooling pipe connectors by internal threads of lower ports of the cooling pipe components, one end of each inner ball-end set screw is arranged in the rotating shaft, the other end of each inner ball-end set screw is disposed in an annular groove of the lower portion of the corresponding cooling pipe component, and the O-shaped rings are mounted in sealing grooves of the lower portions of the cooling pipe components and are arranged among the rotating shaft and the cooling pipe components. The core fixing cooling radiating system is compact in structure and fine in water sealing performance, cooling water can circulate in the rotating shaft in a heat field environment, the temperature of the shaft is reduced, and the service life of the rotating shaft is prolonged.

The invention discloses a cable watertight stuffing box and a using method thereof. The cable watertight stuffing box comprises a box base and a box body fixedly connected onto the box base, wherein through cable holes are arranged in the box base and the box body, and a plurality of stuffing cavities are arranged in the cable holes. The using method includes: A, enabling cables to penetrate through the box body and the cable holes in the box base; B, rotating a fastening nut and compressing a sealing pad and a plane sealing ring on the lower side of the fastening nut; C, removing an outer layer protective sleeve in a second stuffing cavity, and filling sealing agents into the second stuffing cavity after a cable core is exposed; D, cutting the cable cores according to the wiring length and removing surface layer protective sleeves of wiring ends of the cable cores, and installing wire lugs after the metal cable cores are exposed; and E, dripping fast-dry glue on the connection portion of the metal cable cores and the surface layer protective sleeves and the surfaces of the wire lugs and the metal cable cores, and removing the fast-dry glue on the conducting position of the wire lugs after the fast-dry glue is cured. The multilayer sealing protection of the cables is finished by the plurality of stuff boxes, and the watertightness of the cable watertight stuffing box is effectively improved. The cable watertight stuffing box and the using method are used in the field of cable connection and sealing.

The invention provides a novel rail vehicle windshield. The novel rail vehicle windshield comprises a capsule main body and a metal flange which are integrally molded; and the capsule main body is sprayed by using any one of a pure polyurea material, a half polyurea material or a polyurethane material. The novel rail vehicle windshield has the advantages that the wind and rain preventing performance is good, the service life is long, the windshield is integrally molded at one time by using SPUA spraying and molding process, the making process is simple and environmentally friendly, and the production efficiency is high.

The invention discloses an inspection well technology, in particular to an integral glass fiber reinforced plastic inspection well; the integral glass fiber reinforced plastic inspection well includes a well body end, a variable diameter well body, connecting branch pipes and a well chamber chute. The end of the well body is set at the uppermost position of the inspection well, and the lower end of the well body is provided with a variable-diameter well body, and the lower end of the variable-diameter well body is provided with a connecting branch pipe and a well chamber chute; the integral type of the present invention FRP inspection well is environmentally friendly, light in weight, simple and convenient to install, high in strength, high in rigidity, good overall shape, good in closed water sealing, corrosion resistant, acid and alkali resistant, smooth surface without scale, small water resistance, and long service life Long and other advantages, suitable for large-scale promotion and application.

The invention discloses a water guide system for a garment steamer. The water guide system for the garment steamer comprises a heating device, a water supply device and a water guide mechanism arranged between the water supply device and the heating device. When the garment steamer is normally used in an upright state or inclines not above 90 degrees, water will not flow out of the garment steamer. The whole garment steamer has good water sealing performance, and cleaning trouble caused by water leakage is saved for users. Meanwhile, it is ensured that when a refrigerator is started, steam is generated within short time and persistently until water is used up. The invention further provides the garment steamer containing the water guide system.

The invention discloses a portable multi-purpose ultrasonic transducer based on an ellipsoidal shell, which mainly includes an ellipsoidal radiation head, etc., a front cover, a piezoelectric ceramic sheet, an electrode sheet, a back cover, and a back cover nut. The upper part is connected in series to form a transducer vibrator. The transducer vibrator is connected with the ellipsoidal radiation head through the protruding part of the screw to form the whole transducer. The whole transducer is connected with the stepped slender tool head to form an ultrasonic transducer. The device is placed in the ellipsoid shell and the two are sealed and supported through the sealing ring and the thread on the ellipsoidal radiation head. The bottom of the ellipsoid shell is connected with the watertight plug to ensure its overall watertight characteristics. The invention improves the ability of the transducer to apply electric power; greatly reduces the noise radiated by the transducer through the water tank; makes the transducer both portable and aesthetically pleasing; has cavitation corrosion resistance; collects partial cleaning of clothes and cleaning of the water tank , small diameter cup cleaning and other purposes in one.

The invention relates to a farmland irrigation gate, in particular to a portable closed openness-controllable farmland irrigation gate. The portable closed openness-controllable farmland irrigation gate comprises a gate plate and a gate frame, wherein the gate frame comprises a gate frame main body and a gate frame cover plate. The gate frame main body comprises a gate frame main body panel and rims arranged on the left and right sides and the bottom of the panel, and a gate hole is formed in the middle part of the gate frame main body panel. The gate frame cover plate is of an n-shaped structure formed by a horizontal plate and vertical plates, and the vertical plates are respectively and correspondingly fixedly connected with the rims. Wedge-shaped bulges B are arranged on the lower partof one side of a surface, back to the water, of each vertical plate on two sides of the gate frame cover plate; wedge-shaped bulges A are respectively arranged on the left and right sides of the upper part of the gate plate, and the two wedge-shaped bulges A respectively correspond to the positions of the vertical plates on the left and right sides; and the inner side wall of the left side rim, or the right side rim of the gate frame main body is a serrated structure to form a plurality of concave steps for holding the gate plate. The portable closed openness-controllable farmland irrigationgate provided by the invention is simple to install and low in manufacturing cost, and light and convenient to open and close without obvious friction resistance; when the gate plate is closed, the gate plate is closely attached on the rear side of a gate slot, so that the water stopping effect is good; the gate plate cannot be pulled out of the gate frame, so that the loss of the gate plate can be prevented; and different openness can be controlled, thereby facilitating the water application management.

The invention discloses a floating water sealing coaxial electric connector comprising a connector shell provided with a cable incoming end and an inserting end. The connector shell comprises a fixed shell and a floating shell, wherein the floating shell is inserted into and matched with the fixed shell and is elastically matched with the fixed shell in a floating way through an elastic body which is axially arranged between the outer wall of the floating shell and the corresponding structure of the inner wall of the fixed shell; the position of the fixed shell, which is close to the cable incoming end, is provided with a containing space for installing an elastic glue cushion, and the elastic glue cushion is provided with an inner hole for a coaxial cable to penetrate through, an inner hole wall and an outer wall which are respectively sealed and matched with the coaxial cable and the fixed shell during axial compression; the floating shell is provided with a compression part which supports against and is axially matched with the elastic glue cushion when the floating shell moves towards the cable incoming end relative to the fixed shell; and the fixed shell is provided with a stop part matched with the elastic glue cushion in a limiting way and arranged opposite to the compression part. The floating water sealing coaxial electric connector ensures the good water sealing effect of the cable incoming end when the inserting end is inserted in a floating way.

The present invention relates to a novel simple component magnetometer. The novel simple component magnetometer comprises a housing, a sensor unit, a signal processing unit and a power supply. The signal processing unit, the sensor unit and the power supply are arranged in the housing; the signal output end of the sensor unit is connected with the signal input end of the signal processing unit; the signal output end of the signal processing unit is connected with the signal line running through the housing; the signal processing unit is electrically connected with the power supply; the housing is filled with silicone grease completely inundating the sensor unit, the signal processing unit and the power supply which are installed in the housing; the sensor unit comprises a sensor housing and silicone oil; and the sensor housing is filled with the silicone oil, and the magnetic sensor installed in the sensor housing is submerged by the silicone oil. The novel simple component magnetometer integrates the signal processing unit, the power supply and the sensor unit into one, and is compact and delicate in whole structure, convenient to carry, good in watertightness, good in stability and accurate in detection result.

The present invention relates to waterproofing methods, in particular to a hole-entry waterproofing method for shield tunnels in underground structures. The waterproofing method is characterized in that: before pouring concrete in the well circle of the tunnel, an inflatable pipe is pre-buried, and the mouth of the pipe is connected to an air bag. and the external air source; before the shield enters the hole, install the cord rubber plate, spring steel plate and air bag; when the shield enters the hole, the air bag is inflated to push the spring steel plate to compress the rubber plate. When the machine enters the hole, the air bag is inflated, and the rubber sheet is tightly wrapped on the outer surface of the shield or the lining, so that the gap between the shield and the well circle has good water tightness, avoiding possible muddy water leakage, and changing the In the past, shield tunneling only relied on a single measure of soil reinforcement, which improved the safety factor of shield tunneling.

The invention discloses a water and electricity integrated assembly structure of a UV (Ultraviolet) lamp. The water and electricity integrated assembly structure of the UV lamp comprises the UV lamp, wherein a water and electricity connecting end seat is arranged at one end of the UV lamp, and a water inlet port and a circuit interface are arranged on the water and electricity connecting end seat, the water and electricity integrated assembly structure of the UV lamp is characterized by further comprising a water and electricity connecting shell which is connected with the water and electricity connecting end seat, a water inlet area and an electrical accessory installation area are arranged on the water and electricity connecting shell, the water inlet area is provided with a water inlet and a water outlet, the water inlet is used as a joint access of external water sources, and arranged on the water and electricity connecting shell, the water outlet communicates with the water inlet port on the water and electricity connecting end seat, a printed circuit board(PCB) is arranged in the electrical accessory installation area, and penetrates through the circuit interface through a wire to be electrically connected with the UV lamp; according to the assembly structure of the UV lamp disclosed by the invention, a water route and a circuit are connected and arranged in the same shell by additionally arranging the water and electricity connecting shell to protect the connection of the water route and the circuit, in particular, enable water sealing of the circuit connection to be better, and further enable the appearance of the whole UV lamp assembly more beautiful, and achieve simple and reasonable structure.

The invention relates to an underwater small radiation-resistant photographing device. A shell consists of a lens cap, a cylinder and a rear end cover; the lens cap is in force fit with a lead-containing radiation-resistant optical glass sheet and connected to one end of the cylinder through threads; the other end of the cylinder is in threaded connection with the rear end cover; the rear end cover is connected with a cable joint; the cable joint is connected with a cable; four light emitting diode (LED) illumination lamps are uniformly arranged around a camera; a first sealed chamber and a second sealed chamber which are respectively independent are arranged in the cylinder; the camera and the LED illumination lamps are arranged in the first sealed chamber, a circuit board is arranged in the second sealed chamber, and all joints are sealed by adopting O-shaped rings; and according to the radiation condition, a gamma or neutron radiation shielding module layer is arranged outside the shell, and a third sealed chamber is arranged in the gamma or neutron radiation shielding module layer. By integrated design of auxiliary illumination and the camera, installation and operation of a system are facilitated, the moving condition of an underwater refueling machine of a nuclear power plant in the water is learnt, and help is provided for underwater positioning of the refueling machine.