88results about How to "Protective tightness" patented technology

The invention relates to a seawater-proof movable sealing device of ocean engineering equipment, in particular to a movable sealing device for a telescopic full-revolving rudder paddle, which is used on an ocean engineering boat and an ocean platform. The sealing performance of the telescopic full-revolving rudder paddle is ensured through four measures of a guide sleeve guide and filth clearing protection measure, a packing sealing measure, a lip-type sealing ring sealing measure and a lubrication and leakage check measure, through the efficient lubrication and the leakage check measure, the movable sealing device of the telescopic full-revolving rudder paddle is in an efficient controllable state in seawater, the work safety of the sealing device is improved, and the service life of the telescopic full-revolving rudder paddle is prolonged by more than 50 percent.

The invention discloses a process for installing a large propeller underwater based on an L-shaped floating platform. The process comprises the following steps: building the L-shaped floating platform; detaching a seal cap of an installing port of the propeller on the bottom of a ship; hoisting and launching the propeller into water; and displacing, positioning and installing the propeller. The process overcomes defects and difficulties in the prior art, uses the L-shaped floating platform as a displacing, positioning and position adjusting platform for the propeller, and has strong operability and adaptability.

The invention discloses a packaging structure and packaging method of a module comprising bare chips of a thin-film bulk acoustic wave device. The packaging structure of the multi-chip module comprises a substrate and bare chips, wherein the bare chips include the bare chips of the thin-film bulk acoustic wave device and other functional bare chips; electrodes of all bare chips are correspondingly connected with electrodes of the substrate through golden balls in a flip-chip manner; a film is bonded and fixed on the surface of the substrate; the film is clung to the surface of the substrate and coats all bare chips; and vacuum chambers are formed between all bare chips and the substrate. The electrodes of the bare chips on the to-be-packaged multi-chip module are welded on the corresponding electrodes in corresponding packaging areas on the substrate through a flip-chip technology during packaging; the protective film is laminated on the substrate through a vacuum laminating technology and coats all chips; and heating and solidifying are carried out and the substrate is finally cut according to the packaging areas. According to the packaging structure and the packaging method, the bare chips are directly adopted for packaging, so that the volume is greatly reduced in comparison with that of original secondary packaging, and meanwhile, the packaging efficiency is improved.

The invention provides a display panel packaging structure, a display panel and a display device. The packaging structure comprises a substrate and a packaging cover plate, wherein the packaging coverplate and the substrate are oppositely arranged, a groove is formed in the position, opposite to a non-display area of the substrate, of the packaging cover plate, a stress buffer piece is arranged in the groove, the substrate and the packaging cover plate are bonded through packaging glue, the groove is filled with the packaging glue, a stress buffer piece is located in the packaging glue, a buffer coefficient of the stress buffer piece is larger than that of the packaging glue, the stress buffer piece can reduce stress generated by external force on the packaging glue, the packaging glue isprevented from cracking, so sealing performance of the packaging structure is protected, and the water vapor is prevented from entering the packaging structure. The packaging structure is advantagedin that the display panel comprising the packaging structure is good in packaging effect, stable in display effect and long in service life.

The invention discloses a packaging structure for a film volume acoustic wave filter and a packaging method. The packaging structure comprises a substrate and a chip, wherein a chip electrode is correspondingly connected with a substrate electrode through flip chip; a film layer is fixedly spliced on the surface of the substrate; the film layer is clung to the surface of the substrate and is wrapped on the chip. The packaging method comprises the following steps: 1) dividing a chip packaging area on the substrate; 2) respectively welding the electrode on the to-be-packaged substrate with the corresponding electrode in the corresponding area through a flip-chip bonding technique; 3) pasting a protecting film on the substrate and wrapping all the chips; 4) raising temperature, splicing and curing the protecting film; 5) cutting the substrate, thereby acquiring the film volume acoustic wave filter. According to the invention, the chips are prevented from being polluted, the microminiaturization is realized and the processing efficiency is increased.

The invention discloses a loading, unloading and transferring apparatus for nuclear power plant spent resin and a transferring method thereof, and belongs to the technical field of safety transfer of radioactive wastes. The loading, unloading and transferring apparatus for nuclear power plant spent resin comprises a shielding transporter, a loading connector device and an unloading connector device; in unloading, the shielding transporter is connected with the loading connector device through a hose; in unloading, the shielding transporter is connected with the unloading connector device through a hose. The loading, unloading and transferring method for nuclear power plant spent resin is good in safety and high in efficiency, and enables the pollution risk due to leakage and radiation danger in personnel's operation to be effectively decreased.

The invention discloses a double-stud type lithium ion power battery cover plate structure, and relates to a lithium ion battery. The double-stud type lithium ion power battery cover plate structure comprises a cover plate, plastic sealing parts, a pole, a ceramic insulation sheet and an anti-explosion valve; the double-stud type lithium ion power battery cover plate structure is characterized in that the studs after adapter coupling are arranged on the outer side of the cover plate, a hole is formed in a position for penetrating of a pole pressure plate and the pole so as to allow a pole assembly to pass, the plastic sealing parts are arranged between the cover plate and the pole and between the pole pressure plate and the cover plate, and the pole pressure plate is arranged on the plastic sealing part on the outer side of the cover board. According to the double-stud type lithium ion power battery cover plate structure, a stud and pole non-collinear structure is designed on the cover board for preventing the pole from rotating; injection molding and encapsulation are carried out on the periphery of the pole pressure plate to achieve a limiting effect; the area of the pole pressure plate is increased to ensure the connecting reliability and meet the requirement of the electrical conductivity.

The invention discloses an improved numerically controlled lathe structurally comprising an adsorption plate, an operation panel, a slide rail, a lathe body, a movable slide block, a protective device, a switch door, a fixed seat, an air blowing device, a tool rest and a slide way. After improvement, the air blowing device is operated by a controller, and the air is conveyed into a connecting ringthrough a guide pipe, so that an air blowing port uniformly blows the air out, metal scraps adsorbed on the surface of a tool or a machined part are blown onto the adsorption plate, and the tool is prevented from being interfered with by the metal scraps in the machining process of the part; when the lathe opens the switch door after processing the part, the switch door slides to left and right sides due to inertia; and when the switch door touches a chucking board, the switch door is magnetically and fixedly adsorbed on the chucking board through a magnetic adsorption ball under the magneticaction, and the switch door is protected through cooperation of a protective cover and a buffering bullet piece, such that the inner side of the switch door is avoided from deforming, the switch doorcan be normally closed, and the sealed effect of protecting the switch door is achieved.

A multilayer printed wiring board and its manufacturing method, by using a copper foil laminated board (1) for a multilayer printed wiring board to manufacture a multilayer printed wiring board so that a plurality of single-sided sheets with an adhesive layer are stacked and aligned The positional alignment of the circuit board becomes easy, thereby providing a multilayer printed wiring board and a manufacturing method thereof capable of reducing the occurrence of misalignment defects. Among them, the multilayer printed wiring board is composed of a copper-clad foil (2) that does not form a circuit, a hard insulating layer (3) formed by curing a thermosetting resin, and an adhesive layer (4) that can be temporarily melted by heating. It is integrated with the protective film (5) in this order.

The invention discloses an efficient installation method of a dust cover hoop, and belongs to the technical field of dust cover hoop installation. According to the method, the installation efficiencycan be improved, time is shortened, and manpower is saved, so that sealing between a dust cover and the dust cover loop can also be protected greatly, structure is simple, and using is convenient. Themethod includes the following steps that 1, a device is installed and started; 2, a hoop is filled; 3, a move mode of the hoop is determined; 4, a position of the hoop before installation is determined; 5, the hoop is installed; 6, a finished product is installed and sent to a finished zone; and 7, when next dust cover assembly is transported to a conveying device, the steps from step 2 to step 6are repeated.

The invention discloses an automobile data recorder capable of broadening the visual field of drivers. The automobile data recorder is composed of a pedestal, a support bar, a camera module, a display module, a data communication module, and a sensor; the camera module can be disassembled and installed quickly, and is arranged on the top of an automobile via the pedestal and the support bar; the display module is capable of sending sound and storing video, and is fixedly arranged on a front part in the automobile; the data communication module is connected with the camera module and the display module, and is provided with electricity via an USB interface or a cigar lighter interface in the automobile; and the sensor is arranged on the automobile door of the driver's side, or under the seat cushion of the driver. The automobile data recorder is simple and convenient for using; advantages of automobile data recorders, interior mirrors, and driving periscope systems are combined in relatively low cost, and disadvantage are avoided; and driving safety is improved in an active manner and a passive manner.

The invention discloses a high-temperature double-piston fixing ball valve which comprises a valve seat arranged between a valve deck and a ball. The valve seat is in sealed contact with the ball, a sealing assembly is arranged between the valve seat and the valve deck and comprises a sealing body, the two ends of the sealing body are provided with a first elastic piece and a second elastic piece respectively, one end of the first elastic piece abuts against the valve seat, the other end of the first elastic piece abuts against the sealing body, one end of the second elastic piece abuts against the valve deck, the other end of the second elastic piece abuts against the sealing body, the outer diameter of the sealing body is larger than the outer diameter of the position where the valve seat and the ball are sealed, and the inner diameter of the sealing body is smaller than the inner diameter of the position where the valve seat and the ball are sealed. According to the high-temperature double-piston fixing ball valve, the sealing assembly is used for sealing, meanwhile, the sealing assembly can achieve the bidirectional-sealing double-piston function, the sealing effect is good, the high-temperature double-piston fixing ball valve can be applied to the high-temperature working condition, and the problem of high-temperature medium leakage is effectively solved.

The invention relates to a seawater-proof movable sealing device of ocean engineering equipment, in particular to a movable sealing device for a telescopic full-revolving rudder paddle, which is used on an ocean engineering boat and an ocean platform. The sealing performance of the telescopic full-revolving rudder paddle is ensured through four measures of a guide sleeve guide and filth clearing protection measure, a packing sealing measure, a lip-type sealing ring sealing measure and a lubrication and leakage check measure, through the efficient lubrication and the leakage check measure, the movable sealing device of the telescopic full-revolving rudder paddle is in an efficient controllable state in seawater, the work safety of the sealing device is improved, and the service life of the telescopic full-revolving rudder paddle is prolonged by more than 50 percent.

A wind scooper of a panoramic power sunroof consists of a wind scooper upper movable rod (1), a wind scooper lower fixed rod (2), a dust screen (3), mounting hooks (4), fixing pins(5), a sunroof framework (6) and a torsion spring fixing pin (7), wherein the wind scooper upper movable rod (1) is fixed above the wind scooper lower fixed rod (2); the two mounting hooks (4) are fixed on the left side and the right side of the wind scooper upper movable rod (1) through the fixing pins (5); the wind scooper lower fixed rod (2) is fixed on the sunroof framework; and the wind scooper of the panoramic power sunroof is characterized in that the dust screen (3) is mounted and fixed between the wind scooper upper movable rod (1) and the wind scooper lower fixed rod (2). The wind scooper of the panoramic power sunroof effectively prevents water leakage caused by blockage of a water draining pipe of the sunroof, effectively protects a sealing strip of the sunroof, protects leakproofness of the sunroof, and can effectively prevent mosquitoes from entering a carriage during opening of the sunroof when there are many mosquitoes in the hot summer.

The invention relates to an automatic-plugging urine detection collection device in the field of medical supplies. The automatic-plugging urine detection collection device comprises a layered liquid collector, a storage container and a liquid guide plugging part. The liquid guide plugging part is provided with a liquid guide main body used for communicating the layered liquid collector with the storage container; a rotary joint connecting and communicating with one end of the liquid guide main body and forming rotary connection in cooperation with the layered liquid collector; a sealing piecearranged on the outer surface of the other end of the liquid guide main body, wherein the edge of the sealing piece is attached to the inner wall of the storage container during installation, and an exhaust hole penetrating through the sealing piece is arranged on the sealing piece; and a plugging cover arranged on the outer surface of the liquid guide main body, positioned between the rotary joint and the sealing piece, and cooperated with an opening of the storage container to form fastening connection. The side edge of the plugging cover is provided with an exhaust groove. The storage container can communicate with the outside through the combination of the exhaust hole and the exhaust groove, so that the storage container can be quickly filled with urine while forming automatic plugging, thereby preventing the urine from flowing out reversely.

The invention discloses an anchoring-type hydraulic casing shaping tool. The upper end of the anchoring-type hydraulic casing shaping tool is connected with an oil pipe through a pipe thread. When theanchoring-type hydraulic casing shaping tool is tripped in and encounters resistance, pressurization is conducted through a ground pump truck, high-pressure liquid enters the anchoring-type hydrauliccasing shaping tool through the oil pipe and flows through first liquid inlet channels in the lower ends of anchor jaws, anchor jaw compression reset springs expand outwards under the effect of the pressure to be anchored on the inner wall of a casing, a supporting rod moves downwards to compress a shaping spring, and a baffle ring has a protection function; the supporting rod continues to move downwards, and balls expand downwards under the effect of shaping grooves in the outer wall of the supporting rod; when a shaping shaft and a lower guide sleeve pass through a shaping position, the pressure of the oil pipe is released, the anchor jaws retreat under the effect of the reset springs, the supporting rod moves upwards, and the balls enter the shaping grooves again; and a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring, a fifth sealing ring, a sixth sealing ring, a seventh sealing ring, an eighth sealing ring, a ninth sealing ring and a tenth sealing ring are arranged.

The invention relates to a high-temperature-resistance oxygen sensor device. The high-temperature-resistance oxygen sensor device comprises an oxygen sensor, a heat-insulating insulating pipe and a protective sealing cylinder; one end of the oxygen sensor is connected with one end of the heat-insulating insulating pipe, and the protective sealing cylinder is arranged on the outer side of the heat-insulating insulating pipe in a sleeving mode; the oxygen sensor is a detecting main body, one end of the oxygen sensor is connected with a plurality of cables, a plurality of through holes are formedin the heat-insulating insulating pipe in the length direction of the heat-insulating insulating pipe, and the multiple cables penetrate through the multiple through holes in a one-to-one correspondence mode; and the space between the protective sealing cylinder and the heat-insulating insulating pipe is filled with a heat-insulating material, one end of the protective sealing cylinder is connected with the oxygen sensor, and sealing is formed by the other end of the protective sealing cylinder and the heat-insulating insulating pipe through a plugging plate. According to the high-temperature-resistance oxygen sensor device, the working life of a common oxygen sensor is effectively prolonged, the operation damage rate of the high-temperature-resistance oxygen sensor device in the high temperature environment is decreased, and normal transmission of a measuring signal value is ensured.

The invention relates to a hydraulic cylinder. The hydraulic cylinder comprises a cylinder barrel, wherein a reinforcing rib is arranged in the cylinder barrel and is provided with a sealing layer; apiston rod is arranged in an inner cavity of the cylinder barrel; the bottom part of the piston rod is connected with a piston; a supporting ring is arranged between the piston and the sealing layer and is connected with a Y-shaped sealing ring; clamping keys are connected to the bottom part of the piston and are provided with clamping key caps; an oil filter is arranged between the clamping key caps and is connected with a buffering device which is connected with the cylinder bottom; an oil nozzle is arranged on the cylinder bottom and is connected with an oil pipe; the oil pipe is fixed witha fixing part and divides the cylinder barrel and the cylinder bottom; ventilating holes are arranged in the fixing part; a cylinder cover is arranged at the junction of the piston rod and the cylinder barrel and is internally provided with a double-layer sealing ring; a blocking ring is arranged on the double-layer sealing ring and is connected with a guide sleeve; a U-shaped sealing ring is arranged on the guide sleeve; a bulge is arranged on the cylinder barrel at the lower end of the guide sleeve and is connected with an exhausting device. The hydraulic cylinder has the advantages of strong sealing performance, good stability and safety, no leakage and long service life.

The invention discloses a butterfly valve with a sealing protection structure. The butterfly valve comprises a butterfly valve body, a valve rod and a valve plate, wherein the side edge of the valve plate is provided with a soft sealing layer, the right end of the valve plate is fixedly connected with a protection seat, the left side face of the protection seat adopts an arc-shaped structure, andthe surface of the arc-shaped structure is fixedly provided with a strip-type elastic air bag in a pasted manner, the right side face of the protection seat is provided with a horizontal water inlet hole, the water inlet hole communicates with a slantly-arranged water outlet tank, and the lower end of the water outlet tank is located at the bottom of the protection seat, and the protection seat isfurther internally provided with a transmission mechanism used in coordination with the strip-type elastic air bag. By means of the butterfly valve with the sealing protection structure, fit protection can be automatically performed on the soft sealing layer at the side edge of the valve plate when the valve plate is opened to prevent the soft sealing layer from being subjected to fluid medium front-face erosion for a long time, so that the sealing effect of the valve plate and the soft sealing layer is protected, the valve overall service life is greatly prolonged, and the forced shutdown situation caused by medium leakage can further be reduced, so that the production efficiency is improved.

The invention discloses a novel wear-resistant circular spin valve. The novel wear-resistant circular spin valve comprises a first valve deck, a second valve deck, a first valve seat, a second valve seat, a valve plate, a valve plate sleeve and a valve rod, wherein the first valve deck and the second valve deck are arranged face to face; the first valve seat and the second valve seat are inlaid inthe first valve deck and the second valve deck correspondingly; the valve plate is arranged between the first valve plate and the second valve plate and provided with a medium through hole; the valveplate is connected with the first valve deck and the second valve deck to form a medium channel; the valve plate sleeve is fixed between the first valve deck and the second valve deck; the valve rodis connected with the valve plate sleeve and rotates to drive the valve plate to rotate; and the medium channel is opened and closed by changing the position of the medium through hole. The novel wear-resistant circular spin valve is better in sealing effect through plane sealing. After sealing failure, only a sealing material needs to be replaced. The utilization rate of the valve is increased. The using cost is reduced. The service life of the valve is prolonged. Meanwhile, through rotational motion between the valve plate and the valve seats, a medium adhering to the valve plate and the valve seats can be cleaned, and the sealing performance is protected. Moreover, the sealing part of the valve is completely concealed when the valve is in a full open state without being scoured by the medium, and the service life of the valve is greatly prolonged.

The invention discloses a motor encoder power supply method and system taking power from a neutral point of the output end of a frequency converter and belongs to the field of alternating current motors and drive control. The method comprises steps of improving a common-mode voltage waveform at a neutral point of a motor stator winding through a zero-free vector pulse width modulation method so that a common-mode voltage is converted into two levels from four levels; rectifying the suppressed common-mode voltage, and converting the two-level common-mode voltage into a direct-current voltage; and carrying out voltage conversion on the rectified direct current voltage, converting the direct current voltage into a voltage level required by encoder power supply, and then supplying power to theencoder. According to the method, a direct-current weak-current power supply cable led out for supplying power to the encoder is omitted so that the electrical connection between the motor and the frequency converter is simpler, and a problem of encoder power supply cable winding of motors such as industrial robots and the like in application occasions of multi-degree-of-freedom spatial motion isavoided, operation flexibility of the equipment is improved, meanwhile, a stable power supply can be provided for the encoder under different operation conditions of the motor.

The invention provides a tee joint for a waste gas treatment air duct system and a preparation method of the tee joint. The tee joint is composed of a main pipe and a branch pipe, the main pipe is detachably connected with the branch pipe in a detachable manner, so that the situation that the entire replacement is needed when any part of the main pipe and any part of the branch pipe is broken is avoided, and the use and maintenance cost is greatly reduced; a connecting boss, a connecting ring groove and a connecting convex ring are coordinated for use, so that the sealing performance is improved, and the leakage of waste gas is reduced; a heat conduction pipe is detachably connected to the main pipe so that the heat of the waste gas can be guided out, and the sealing performance and the connecting strength of the connection part between the branch pipe and the main pipe can be further protected; and an anti-corrosion inner layer can prevent the gas from corroding the tee joint, the wear resistance of an outer surface layer of the tee joint is improved through a wear-resistant protective outer layer, and the service life of the tee joint is prolonged.

The invention discloses a high-temperature double-piston fixing ball valve which comprises a valve seat arranged between a valve deck and a ball. The valve seat is in sealed contact with the ball, a sealing assembly is arranged between the valve seat and the valve deck and comprises a sealing body, the two ends of the sealing body are provided with a first elastic piece and a second elastic piece respectively, one end of the first elastic piece abuts against the valve seat, the other end of the first elastic piece abuts against the sealing body, one end of the second elastic piece abuts against the valve deck, the other end of the second elastic piece abuts against the sealing body, the outer diameter of the sealing body is larger than the outer diameter of the position where the valve seat and the ball are sealed, and the inner diameter of the sealing body is smaller than the inner diameter of the position where the valve seat and the ball are sealed. According to the high-temperature double-piston fixing ball valve, the sealing assembly is used for sealing, meanwhile, the sealing assembly can achieve the bidirectional-sealing double-piston function, the sealing effect is good, the high-temperature double-piston fixing ball valve can be applied to the high-temperature working condition, and the problem of high-temperature medium leakage is effectively solved.

The invention discloses a novel split automatic drug selling machine, which, in the structure, comprises a drug cabinet, a drug cabinet door, supporting legs, a drug outlet and a control cabinet, wherein the drug cabinet is composed of a right cabinet frame body, a left cabinet frame body, a folding and receiving mechanism, a plugboard mechanism, a first magnet strip, an electromagnet and a slot hole. The drug cabinet is matched with the plugboard mechanism through the folding and receiving mechanism to store the whole drug cabinet, the length of the drug cabinet is reduced, the drug cabinet is thus not limited by the over large volume during the transporting process, the drug cabinet uses the electromagnet to more firmly limit the storage of the plugboard mechanism, the drug cabinet can be prevented from being affected when not transported, and the structure adopts the split and telescopic structure design, transportation of the drug cabinet and separate storage of the drug are facilitated, and the trafficability of the is improved.

The invention discloses a mechanism and method for plasma impurity injection of a fusion device. The mechanism comprises a first connecting piece, a second connecting piece, a third connecting piece,a collector, a first guide port, a second guide port, a first guide pipe, a second guide pipe, a linear importer with scales, an air exhaust pipeline, an air exhaust valve, an air exhaust unit and a gate valve. The components are cooperatively assembled, and impurity particles are accurately and efficiently injected into plasma. Falling impurity particles (powder) can be collected when impuritiesare injected into a distribution system for testing, repeated utilization is achieved, and waste is reduced; the sealing performance of the gate valve can be protected, and the service life of the gate valve is effectively prolonged; and the accuracy of the injection amount of the impurity particles (especially powder) injected into the system can be improved. The transition mechanism for impurityparticle (powder) injection is easy to operate, capable of saving energy, efficient and high in precision, and a good technical basis is provided for successful application of impurity injection in afusion reactor in the future.

The invention relates to a double-graduation thermocouple and a use method. According to the double-graduation thermocouple, a K-graduation thermocouple and an N-graduation thermocouple are sealed in a stainless steel protection tube, the K-graduation thermocouple comprises a pair of nickel chromium --nickel silicon electrodes, the N-graduation thermocouple comprises a pair of nickel chromium silicon--nickel silicon magnesium electrodes, upper ends of the K-graduation thermocouple and the N-graduation thermocouple are connected with a wiring box, the wiring box is respectively connected with four electrodes through four leads, electric signals in the electrodes are outputted, the lower surface of the wiring box is connected with the upper end of the stainless steel protection tube, and the inner portion of the stainless steel protection tube is sealed. The double-graduation thermocouple is advantaged in that precise verification on the state of the K-graduation thermocouple can be realized as well as detection on data, equipment sealingness is protected, detection accuracy is improved, operation is simple, and work efficiency is high.

The invention relates to a positive photosensitive resin composition, a positive photosensitive dry film and a manufacturing method thereof, and a pattern forming method. The purpose of the present invention is to provide: a positive photosensitive resin composition which is capable of forming a fine pattern, is capable of obtaining high resolution, has good mechanical characteristics even when cured at low temperature, and is free from deterioration in adhesion force before and after a high-temperature and high-humidity test; and a positive photosensitive dry film. A positive photosensitive resin composition containing: (A) an alkali-soluble resin containing at least one structure selected from the group consisting of a polyimide structure, a polybenzoxazole structure, a polyamideimide structure, and precursor structures thereof; (B) a crosslinkable polymer compound containing a structural unit represented by general formula (1) and having a group that crosslinks with component (A); and (C) a photosensitizer which generates an acid due to light and has an increased dissolution rate in an aqueous alkali solution, and which is a compound having a quinone diazide structure.

The invention discloses a safety valve for a reciprocation pump. The safety valve comprises a valve body, a valve seat, a valve clack, a valve rod, a spring and a valve deck. A valve body inner cavity is formed in the valve body. The valve seat is in a cup shape and is installed in the valve body inner cavity. The upper end of the valve clack is pressed at the bottom of the valve seat and used for preventing liquid with normal liquid pressure being leaked outwards. The valve rod is used for pressing the valve clack or pushing a lower spring seat. The spring is connected with an upper spring seat and the lower spring seat. The valve deck is cylindrical. The top end of the valve deck is close to the top face of the upper spring seat. The safety valve is light and compact in structure and high in sensitivity, the installation position is unlimited, and the sensibility to vibration is low; and meanwhile, a buffer cavity is formed in the inner cavity of the safety valve, the sealing face of the valve clack and the sealing face of the valve seat are effectively protected, the sealing performance of the safety valve is reliable, and the service life of the product is long.

The invention discloses a leak-proof water purifier comprising a first water inlet valve, a filtering core, a water leakage detection device, and an electrical control system. The first water inlet valve is arranged on a water inlet pipe of the filtering core. A water outlet port of the filtering core communicates with an inlet side of a discharge tap. The water leakage detection device is arranged on a water inlet pipe or a water outlet pipe of the first water inlet valve. The electrical control system is electrically connected with the first water inlet valve and the water leakage detection device. The electrical control system comprises a controlling module which can process signals detected by the water leakage detection device and can control the opening and closing of the first water inlet valve according to the processing result. The water purifier provided by the invention is provided with the water leakage detection device controlled by the electrical control system. With the water purifier, determination standards of water leakage and normal operation are scientifically set, such that leakage accident expansion can be effectively limited, and leakage can be stopped. The structure is reasonable, and an effect is ideal.

The invention discloses an inflatable electric power pipeline sealing device and a production method. The sealing device is characterized by comprising an air type sealing bag body comprising a sealing bag body. The sealing bag body consists of a soft metal surface layer and multiple high-molecular material layers and is in shape of a flat ball body. A cavity is arranged in the sealing bag body. High temperature resisting waterproof films are integrated into the sealing bag body are recombined on two sides of the surface of the sealing bag body. An air charging opening is arranged in one end of the sealing bag body. The interior of the air charging opening contains self-filling colloid materials. A wear-resisting layer is arranged on the soft metal surface layer of the sealing bag body. A waterproof glue layer is coated on the inner wall of the sealing bag body. According to the invention, after air is charged by use of the inflatable electric power pipeline sealing device, cables in a pipeline can be sufficiently protected and sealed, and service lifetime is prolonged.