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40results about How to "Improve leak-proof performance" patented technology

Method and system for auditing and distributing sensitive data based on evolution strategy

The invention relates to the technical field of information safety, particularly to a method and a system for auditing and distributing sensitive data based on an evolution strategy. The system of the invention comprises a risk evaluation module based on trust, an auditing and distributing module based on a strategy, a data leakage auditing module and a sensitive data management service module; the risk evaluation module calculates the trust level of the user behavior and investigates the intersection of a leakage set and an intersection of an acquired set of the user, so that the crime risk of the user is obtained; the distributing module determines a distribution policy under the guide of a crime factor and a judging sum formula according to user application and distribution records; and the auditing module records a distributing log, counts the information for analyzing the user behavior and the data leakage, and feeds back an auditing result to the risk evaluation module and the distributing module. The invention meets the requirements of the anti-leakage application of the sensitive data having high requirements for data completeness; the detection source is detected by the intersection of the acquired data set of the user and the leakage data set; and no watermark information needs to be imbedded, so that the invention meets the application requirements of the sensitive data having high requirements for the completeness and the privacy.
Owner:WUHAN UNIV

Equation password encryption method

The invention relates to the technical field of information encryption technologies, in particular to a password encryption method. The method mainly refers to that address codes and numbers are combined and operated to compile an equation used as a password, which replaces the traditional method that fixed numbers, letters or character information are used as a password. A core component of the method comprises a static password, an equation password, a random prompt code, a verification and execution code, a micro-programmed control unit (MCU), input and output equipment, and the like, wherein the static password and the equation password are preset; the MCU randomly presents a prompt code to match with the operations of the static password, the equation password and the random prompt code to obtain a new number password; and a user uses own static password and equation password to match with the random prompt code to calculate out the verification and execution code, which can obtain random passwords being different every time; and a dynamic scrambler is avoided being used, and the difficulty of the equation can be set as required, which can achieve the purpose of high security and secrecy.
Owner:李强

Microwave leakage preventing device

The invention relates to a microwave leakage preventing device which can realize a plant-mixed asphalt heat regenerative heating technique and comprises a door, a silicon rubber gasket and an inner cavity. Summing up the previous microwave leakage preventing device adopting the silicon rubber sealing technique, the leakage preventing function is lowered because a door seal is easy to damage or age, therefore, larger power is adopted in a magnetron. Microwave enters into the door by adopting a protective mode that a chute preventing structure is sealed and combined with silicon rubber, the chute preventing structure leads the microwave to produce reversion and mutual resistance, thereby achieving the purpose of preventing leakage. Meanwhile, the silicon rubber can absorb the microwave and play a role of better prevention.
Owner:SHENYANG NORTH TRAFFIC HEAVY IND

Correctable automatic adjustment double-plug linkage liquid leakage prevention exhaust valve

The invention discloses a correctable automatic adjustment double-plug linkage liquid leakage prevention exhaust valve. The valve comprises a valve body, an upper-stage cavity and a lower-stage cavityare formed in the valve body, a piston pipe is installed at the upper end of the valve body in a sealed and threaded mode, and the lower end of the piston pipe extends into the upper-stage cavity andis provided with a synchronous pipe in a sealed and sliding insertion mode. The synchronous pipe sleeves a sealing plug, and the lower end of the synchronous pipe extends into the lower-stage cavityand is provided with a floating ball plug. Linkage sealing is achieved through the sealing plug and the floating ball plug under the action of the synchronous pipe, the liquid leakage degree is sensedthrough a pressure regulating floating ball, and a pressure regulating air hole is opened through a piston column to release high-pressure gases in the floating ball plug into the upper-stage cavityto restrain rising of the liquid level and increase buoyancy of the floating ball plug. Reinflation correction reuse is achieved through the piston pipe and a one-way inflation nozzle, the service life of the exhaust valve is prolonged, the liquid leakage prevention effect is improved, the liquid conveying cost is saved, and resource waste is avoided.
Owner:YUHUAN QIYUAN TECH CO LTD

Management method for preventing medical waste from leaking

The invention discloses a management method for preventing medical waste from leaking. According to the method, the initial weight of medical wastes is weighed, and the completeness of the medical wastes is determined through matching verification, so that the situation that the medical wastes are missed in the transferring process is reduced; by setting identity identification code, the identityof the medical waste can be recognized, so that the risk that lawbreakers use other objects with the same weight to carry out bag changing on the waste is avoided, and the whole treatment process of the medical wastes is safe; when the medical wastes are stored, the medical wastes are sealed and stored through a temporary storage box, so that the anti-leakage effect of the medical waste is furtherimproved; the situation of the medical waste is conveniently observed through video monitoring, so that safety is improved; and the medical waste needs to be processed through an early warning management module before being delivered out of a warehouse, the most correct judgment can be made, corresponding early warning information is generated, and the anti-leakage effect is effectively improved.
Owner:南京贝克勒尔智能科技有限公司

Fluid guiding device and vacuum container having the same

The invention relates to a fluid guiding device including a taper piston and a tapered piston guide part. The tapered piston includes a tapered part. The center of the bottom face of the tapered partis provided with a guide post. The bottom face of the tapered part is also provided with a plurality of fluid guiding grooves extending to the guide post from the edge of the bottom face of the tapered part. The front part of the tapered piston guide part includes a top hole and a guide channel. The guide post is inserted into the guide channel fitting with the guide post. The channel wall of theguide channel is provided with an exhaust groove formed along the length direction of the guide channel. The guide channel and the exhaust channel are connected with the top hole. When the guide postis inserted into the guide channel completely, the exhaust channel can be connected with the guide channel. The invention also relates to a vacuum container adopting the above fluid guiding device. The container is long in vacuum maintaining time, simple in structure and convenient to transport.
Owner:杨传臣

Atomizer

The invention discloses an atomizer which comprises a bottle body, a spray head, an air inlet guiding pipe and a one-way valve structure. The bottle body is internally provided with a containing cavity used for containing a liquid to be atomized, the spray head is connected with the bottle body and seals the containing cavity, the spray head is provided with an air inlet, the air inlet guiding pipe is arranged inside the spray head, a first end of the air inlet guiding pipe communicates with the air inlet, a second end of the air inlet guiding pipe stretches into the containing cavity, the one-way valve structure comprises a valve inlet and a valve outlet, the liquid can flow from the valve inlet to the valve outlet and cannot be inverted, and the valve inlet communicates with the second end of the air inlet guiding pipe. According to the atomizer, the valve inlet of the one-way valve structure communicates with the second end of the air inlet guiding pipe, only gas is allowed to passthrough the valve inlet from the air inlet guiding pipe and flow from the valve outlet into the containing cavity, but the liquid to be atomized inside the containing cavity is not allowed to be inverted to flow from the valve outlet to the valve inlet and into the air inlet guiding pipe, the leakage of the liquid to be atomized from the air inlet guiding pipe to the outside of the atomizer can beavoided, the pollution to other articles is avoided, the leakproof performance of the atomizer is improved, and the usage experience of users is improved.
Owner:深圳市艾斯龙科技有限公司

Dual-valve safety device capable of being repeatedly used

PendingCN107366768AImprove leak-proof performanceRealize the role of double security protectionEqualizing valvesSafety valvesEngineeringSteel ball
The invention discloses a dual-valve safety device capable of being repeatedly used. The device comprises a valve body, an air inlet end safety trigger plugging mechanism and an air outlet end safety trigger plugging mechanism are arranged in an inner cavity of the valve body, the valve body comprises a shell and end covers connected to the two ends of the shell, each end cover is provided with an air pipe connecting head and an air flow channel, a center ring shaft is arranged in an inner cavity of the shell, the center ring shaft is connected with the inner wall of the shell through fan-shaped pieces on the periphery of the center ring shaft, the inner cavity of the shell is divided into a left cavity and a right cavity, an air duct of the left cavity and the right cavity is formed between two fan-shaped pieces, the air inlet end safety trigger plugging mechanism and the air outlet end safety trigger plugging mechanism are correspondingly arranged in the left cavity and the right cavity and each comprise a valve element, a temperature sensitive metal and a trigger arm, a valve rod is mounted at one end of a center hole of the center ring shaft in a sliding manner, the inner end of the valve rod makes tight contact with a valve body spring in the center hole of the center ring shaft, the outer end of the valve rod is connected with a conical valve head, a clamping groove is formed in the valve rod, one end of the temperature sensitive metal is arranged in the clamping groove of the center ring shaft, and the other end of the temperature sensitive metal is connected with the trigger arms, a compression spring and steel balls. Gas can be automatically cut off, the leakage-prevention effect is good, repeated use is achieved, and the cost is low.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY

Shaft seal of nuclear grade centrifugal fan

The invention discloses a shaft seal of a nuclear grade centrifugal fan. The shaft seal comprises a transmission shaft and a fan volute. A flow guiding air returning cavity wrapped by a flow guiding air returning cavity casing is arranged on the right side of the fan volute, the fan volute and the flow guiding air returning cavity are in clearance fit with the transmission shaft, one end of an air returning pipe is further connected in the flow guiding air returning cavity, the other end of the air returning pipe is connected with a fan air inlet, sealing fillers are arranged at the right end of the flow guiding air returning cavity, the sealing fillers and the transmission shaft are matched closely, a sealing cover is arranged on the sealing fillers, and the sealing cover is further fixedly connected with the flow guiding air returning cavity casing. The shaft seal solves the problem in the prior art and has the advantages of being reasonable in structure, simple in maintaining, low in leakage quantity, safe and reliable and the like.
Owner:NANTONG DART POLLRICH FAN

Display information encryption method, device and equipment and storage medium

The invention relates to the field of information security, and provides a display information encryption method, device and equipment and a storage medium, wherein the method comprises the steps of obtaining a target sensitive level of current display information, and when the target sensitive level reaches a preset sensitive level, collecting a first image of a display area of a target display area corresponding to the current equipment according to a first preset frequency; judging whether camera equipment exists in the target display area or not according to a preset camera equipment identification model and the first image of the display area; and when the camera equipment exists, performing corresponding encryption processing on the current equipment and / or the current display information. In addition, the invention also relates to a block chain technology, and the camera device identification model can be stored in the block chain. According to the invention, information leakagecaused by camera equipment can be effectively avoided; the anti-leakage effect of equipment display information is improved; watermarks are prevented from being added to all display information of the equipment; and the user experience is improved.
Owner:ONE CONNECT SMART TECH CO LTD SHENZHEN

Door seal structure, refrigeration device and seal device

The invention discloses a door seal structure, a refrigeration device adopting the door seal structure and a seal device adopting the door seal structure. The door seal structure comprises a door body and a container body. The side wall of the container body defines a containing space, wherein one end of the containing space is open, and the other end of the containing space is closed. The door body is used for sealing the open end of the container body. An annular outer edge and a first convex portion are formed on the side, facing the containing space, of the door body, wherein the annular edge surrounds the first convex portion. The first convex portion protrudes towards the closed end of the container body. The end, facing the door body, of the side wall is a free end. The inner edge of the free end is recessed towards the closed end, so that a first convex portion surrounding the first convex portion. At least a part of the first convex portion is contained in the first concave portion. The annular edge faces the outer edge of the free end of the side wall. The technical scheme aims to improve the leakage-resisting effect of the door seal structure.
Owner:HEFEI HUALING CO LTD +2

Atomization seat, atomizer and electronic atomization device

The invention relates to an atomization seat, an atomizer and an electronic atomization device. The atomization seat is used for installing an atomization assembly and an electric connecting piece, an atomization cavity is formed between the atomization seat and the atomization assembly, an gas inlet gap is formed between the atomization seat and the electric connecting piece, and when the atomization assembly works, external gas enters the atomization cavity from the gas inlet gap. Gas is input into the atomization cavity through the gas inlet gap between the atomization base and the electric connecting piece, under the adhesion and blocking effects of the electric connecting piece, leaked liquid, flowing into the gas inlet hole, of the atomization cavity is difficult to leak out of the atomizer from the gas inlet gap, and therefore the leakproof performance of the atomizer is improved.
Owner:SHENZHEN SMOORE TECH LTD

Novel anti-leakage and steam-recycling copper processing equipment

The invention relates to novel anti-leakage and steam-recycling copper processing equipment which comprises a reaction kettle. A partition plate is arranged in the reaction kettle, and a material guide hole is formed in the partition plate. A motor works together with a screw rod and a screw pipe to open and seal the material guide hole, so that harmful gas in the reaction kettle cannot leak during feeding. A vacuum pump is arranged, so that the feeding time of copper powder is shortened, and the anti-leakage performance of the reaction kettle is further enhanced. Meanwhile, a steam circulating device is connected to the outer part of the reaction kettle, the harmful gas generated in the reaction kettle is recycled, and the maximization of environmental protection benefits is realized.
Owner:韩亚半导体材料(贵溪)有限公司

Automobile exhaust pipe detection equipment and automobile exhaust pipe leakage detection method

The invention relates to the field of automobile exhaust pipe detection. An automobile exhaust pipe detection equipment comprises a flow detection device, a cold insertion device, a hot embedding device, a tightening device, a dust removal device, a leakage test device and a control system; the flow detection device is connected with the cold insertion device; the flow detection device is used forflow detection of an exhaust pipe; the cold insertion device is used for performing cold insertion processing on the exhaust pipe; the hot embedding device is connected with the cold insertion device, and the hot embedding device is used for performing nut hot embedding processing; the tightening device is connected with the hot embedding device, and the tightening device is used for tightening anut on the exhaust pipe; the dust removal device is connected with the tightening device, and the dust removal device is used for performing dust removal on the interior of the exhaust pipe; and theleakage test device is connected with the dust removal device, and the leakage test device is used for detecting the leakage condition of the exhaust pipe. The automobile exhaust pipe detection equipment provided by the invention has the advantages of improving the anti-leakage sealing performance and the anti-blockage effect of the exhaust pipe, and further improving the detection effect and thedetection quality of the exhaust pipe.
Owner:苏州创悠检测技术有限公司

Novel gasket

The invention discloses a novel gasket which comprises a gasket body. The gasket body is provided with an annular groove and an inner bore. Since the gasket is provided with the annular groove structure, when the gasket is under the action of an external force, a certain pressure can be generated in the groove so that the pressure difference is generated between the inside and the outside of the gasket, which is beneficial to the improvement of the leakage prevention capacity of the gasket, and meanwhile, the good air tightness of electronic equipment can be ensured.
Owner:常熟市双华电子有限公司

Novel seal washer structure

The invention discloses a novel seal washer structure. The seal washer comprises a washer body and an inner ring, wherein the washer body is provided with an annular groove and an inner bore; the inner ring is provided with another annular groove; and the washer body and the inner ring are fixed in a binding mode. A washer body and inner ring double-layer structural design is applied to the washer, and because the washer body and the inner ring are made of different materials with different performances, the sealability of the seal washer can be improved by using the washer body and the inner ring together; meanwhile, the inner ring can be prepared from various materials so that the inner ring has various functions and the application range of the seal washer is widened; in addition, because of the design of the annular groove on the inner ring, a certain pressure difference between the inside and the outside of the inner ring can be generated when the inner ring is under the action of a force, thereby further improving the leakage prevention capacity of the seal washer and ensuring the excellent sealiability of electronic equipment.
Owner:常熟市双华电子有限公司

Valve with removable valve rod of anti-leakage structure

The invention discloses a valve with a removable valve rod of an anti-leakage structure, and relates to the technical field of valves. The valve with the removable valve rod of the anti-leakage structure comprises a valve body, a main rod and a force application mechanism; the right and left sides of the valve body are each provided with a threaded connecting rod, and the middle part of each threaded connecting rod is fixedly provided with a fixing block; the valve body is internally provided with an isolating mechanism, and a rubber bottom block is installed above the isolating mechanism; therubber bottom block is internally provided with a connecting block, and the middle part of the main rod is provided with a sealing mechanism; and the main rod is located above the rubber bottom block. The valve with the removable valve rod of the anti-leakage structure is provided with an air bag and a rubber layer, and air can be introduced into the air bag through an air pump; the air bag starts to inflate, so that the rubber layer is pushed for expansion, and the rubber layer, the valve body, the main rod and a top cover are fit closely; and thus, liquid leakage can be avoided effectively,and the sealing performance of the valve can be improved effectively.
Owner:金华市唯创机械技术研发有限公司

Air energy water heater

InactiveCN104296377AGuaranteed to remove water and alkaliImprove leak prevention effectFluid heatersHeat transfer efficiencyEngineering
The invention discloses an air energy water heater which comprises an inner container and a heat exchange coil. The heat exchange coil is located in the inner container, two ends of the heat exchange coil penetrate through the inner container, and the heat exchange coil is of a double-layer coil structure. The double-layer coil is built in the inner container to perform heat exchange, the length of a heat exchange tube in the inner container is increased through the double-layer coil, a heat medium can perform full heat exchange in the inner container, and meanwhile the whole air energy water heater is invariant in size, simple in structure, high in heat transfer efficiency, low in energy consumption and manufacture cost. Compared with a traditional air energy water heater box in which clean keeping, sterilization and descaling cannot be achieved, a detachable inner coil heat exchanger is assembled in a heat storage water tank of the enamel inner container of the air energy water heater, can be used for daily dismounting and cleaning, descaling, sterilization and disinfection and maintenance and enables each hair follicle respiratory system on the body of each consumer using the air energy water heater to enjoy clean and sanitary heat accumulation warm water.
Owner:何厚辉

Clamping plate type corrosion resistant abrasion-proof slurry pump

The invention discloses a holding plate decay-resistant and wear-resistant slurry pump which comprises a pump body (1), a pump cover (2), a shaft (3), a sealing box (4), a vane wheel (5) and a mechanical sealing device; the mechanical sealing device consists of a moving ring (6), a static ring (7), a static ring seat (8), a spring (9) and a spring seat (10); the spring seat (10) is positioned with two dummy clubs of the static ring seat (8) by two seams (11) at one end; the static ring (7) is positioned with two dummy clubs (12) at the other end of the spring seat (10) by the two seams on the static ring (7) ; the moving ring (6) is positioned with the vane wheel (5) by the seams on the moving ring (6); the friction surface of the moving ring (6) contacts the friction surface of the static ring (7). The structure adopted by the invention prolongs the service life of the slurry pump due to being capable of improving leak prevention performance.
Owner:沈翕和

A machine oil alarm joint leakage-proof structure

The invention provides an anti-leakage structure for a joint of an engine oil alarm, which includes a connecting column, an insertion piece and a connecting piece. The connecting piece is arranged between the connecting post and the inserting piece, a limiting plate is arranged on the connecting piece, and a connecting block is arranged between the connecting post and the inserting piece. In the present invention, a connecting block is arranged between the connecting column and the inserting piece, and a sealing ring is arranged between the connecting piece and the connecting piece. The sealing performance between the connecting column and the inserting piece is improved through the connecting block, and the joint of the oil alarm is improved. The anti-leakage performance enhances the quality and performance of the oil alarm joint, thereby improving the product quality of the oil alarm. The sealing ring further improves the sealing between the connecting column and the insert, and enhances the quality and performance of the oil alarm joint.
Owner:芜湖瑞德机械科技有限公司

Default parameter self-recovery device for power equipment of flexible direct-current power transmission technology

The invention relates to the technical field of power equipment and discloses a default parameter self-recovery device for the power equipment of the flexible direct-current power transmission technology. An identity recognition device is arranged outside the equipment body. A processing device is embedded in the equipment body. A data operating system is installed in the processing device. Default parameters are stored in the original system storage module. The input end of the operating system backup module is further connected with a data encryption device, a virus checking module, a data integrity detection module and a data cleaning module. The output end of the operating system backup module is connected with a data uploading device. According to the equipment default parameter self-recovery device, the real-time backup system and the initial system work together, so that system replacement and default parameter self-recovery can be quickly and timely carried out after a data file is damaged. The data anti-leakage effect is further improved through data encryption.
Owner:JIANGSU ELECTRIC POWER CO +1

Corrugated steel pipe gallery based on prestressed tendons

The invention discloses a corrugated steel pipe gallery based on prestressed tendons. The corrugated steel pipe gallery comprises a pipe gallery body and a concrete base layer, wherein the pipe gallery body is formed in a way that a plurality of unit pipe galleries which are arranged in sequence are combined, a group of outer protection plates and inner protection plates are arranged between every two adjacent unit pipe galleries, the concrete base layer is laid on the bottom surface of the pipe gallery body, and first embedded parts and second embedded parts are embedded in the concrete base layer. The corrugated steel pipe gallery has the beneficial effects that the plurality of unit pipe galleries with the sections of arc-shaped structures are arranged in sequence, so that the mounting edges on both sides of the plurality of unit pipe galleries are connected with the first embedded parts of the concrete base layer in an inserted mode through first mounting holes, then fixed plates on the inner side surfaces of the plurality of unit pipe galleries are connected with the second embedded parts of the concrete base layer in the inserted mode through third mounting holes, and second nuts which are in threaded connection with the ends of the first embedded parts and the second embedded parts are matched, so that the assembly type installation of the corrugated steel pipe gallery is realized, and compared with a traditional corrugated steel plate splicing installation mode, the installation efficiency of the pipe gallery is effectively improved.
Owner:LANZHOU UNIVERSITY

Tail vehicle receiving hopper of bucket wheel machine

The invention discloses a tail vehicle receiving hopper of a bucket wheel machine. The tail vehicle receiving hopper is composed of a receiving hopper body, a receiving hopper support, a receiving hopper hydraulic lifting device, a receiving hopper hydraulic lifting driving device, a rotatable material blocking cover, a material blocking cover rotating driving device and a material blocking cover support; lug plates on the two sides of the receiving hopper body are connected with the receiving hopper hydraulic lifting device fixed to the material blocking cover support to arrange the receiving hopper body on a tail vehicle conveying belt; the rotatable material blocking cover is in an arc shape; the rotatable material blocking cover, the material blocking cover support and the receiving hopper body are coaxially arranged from outside to inside; the lower section of the receiving hopper body is wrapped by the rotatable material blocking cover; a sliding rail on the outer wall of the rotatable material blocking cover is matched with a sliding groove in the inner wall of the material blocking cover support; the material blocking cover driving device drives the sliding rail to slide in the sliding groove to enable the material blocking cover to rotate; and a lifting hopper is matched with the rotatable material blocking cover, abrasion of the inner wall of the hopper and the tail vehicle conveying belt due to bulk material accumulation and blockage can be reduced, and the leakage preventing capacity is fully guaranteed while the tail vehicle receiving hopper adapts to multi-direction tail vehicle coming.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Aluminum alloy canopy

The invention discloses an aluminum alloy canopy. Aluminum alloy side plate borders of the aluminum alloy canopy are arranged at two ends of aluminum alloy back plate borders, the back ends of the aluminum alloy side plate borders are installed and connected to the ends of the aluminum alloy back plate borders, the front ends of the aluminum alloy side plate borders are bent and extend forwards and downwards, the front ends of the aluminum alloy side plate border are installed and connected to the ends of aluminum alloy front plate border, aluminum alloy middle plate borders are distributed, installed and connected between the aluminum alloy back plate borders and the aluminum alloy front plate borders and located on the inner sides of the aluminum alloy side plate borders, the back ends of polycarbonate plates are installed and connected to the aluminum alloy back plate borders, two sides of the polycarbonate plates are installed and connected between the aluminum alloy side plate borders and the aluminum alloy middle plate borders or installed between the two adjacent aluminum alloy middle plate borders, and the front ends of the polycarbonate plates extend in the fronts of the aluminum alloy front plate borders. The aluminum alloy canopy has the advantages of being high in structural strength, long in service life, strong in capability of blocking harmful ultraviolet rays insunlight and good in sealing and water leakage preventing performance.
Owner:广东蔚蓝新型建材有限公司

Compensation sealing valve seat

PendingCN108916416AIncreased amount of wearCapable of automatically compensating for wearPlug valvesEngineeringValve seat
The invention discloses a compensation sealing valve seat. The valve seat comprises an inner ring and an outer ring. The end, close to a valve body, of the inner ring is provided with a shoulder, theouter ring sleeves the inner ring, and a compensation spring is arranged between the inner ring and the shoulder. The ends, close to a valve element, of the outer and inner rings are in shapes fittingthe sealing surface of a valve element, the outer ring fits the valve element to form a first sealing pair, and the inner ring fits the valve element to form a second sealing pair. A containing cavity which is distributed in the circumferential direction is formed between the outer ring and the inner ring, a sealing ring is arranged in the containing cavity, and a third sealing pair is formed bythe sealing ring and the valve element. By arranging the compensation spring and a combined sealing pair, the valve seat has the capacities of compensating for manufacturing and installing errors andautomatically compensating for the abrasion amount. The combined sealing pair can be applied to high-low-pressure working environments, and the sealing performance is good.
Owner:SICHUAN BRAN SHUWEI TECH CO LTD

Working method of tail car receiving hopper of bucket wheel machine

The invention discloses a working method of a tail car receiving hopper of a bucket wheel machine. The device is composed of the receiving hopper, a receiving hopper support, a receiving hopper hydraulic lifting device, a receiving hopper hydraulic lifting driving device, a rotatable material blocking cover, a material blocking cover rotation driving device and a material blocking cover support. The receiving hopper hydraulic lifting driving device is arranged on the receiving hopper support and drives the receiving hopper to achieve lifting motion; and the rotatable material blocking cover is of an arc-shaped structure, and an opening of the rotatable material blocking cover is smaller than the width of a tail car conveying belt. According to the working method, through the method that the receiving hopper can do lifting motion, the distance between the bottom end of the receiving hopper and the tail car conveying belt is actively increased or decreased, bulk materials cannot be blocked and accumulated at the bottom end of the receiving hopper, the bulk material conveying efficiency is improved, and abrasion of the tail car conveying belt is reduced. In addition, through the method that the material blocking cover can rotate, the opening of the material blocking cover faces the car coming direction of the tail car conveying belt all the time, the leakage preventing capability of the receiving hopper during multi-direction car coming of the tail car conveying belt is improved, and meanwhile flying dust pollution is reduced.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Method and system for preventing sensitive data leakage of database

The invention belongs to the technical field of sensitive data protection, and discloses a method and system for preventing leakage of sensitive data of a database, and the method comprises the steps: S1, receiving a data access request sent by a first access terminal; S2, judging whether the data access request contains an expected access position or not; if yes, entering the step S3; if not, entering the step S4; S3, identifying a first access permission of the first access terminal; S4, judging whether the expected access position is matched with the first access permission or not; if yes, entering the step S5; if not, entering step S6; S5, executing data access according to the expected access position; S6, executing an abnormal access alarm, stopping access and clearing the first access authority of the first access terminal; in conclusion, fixed-point access is executed during data access, and whether abnormal access exists or not is judged by comparing the expected access position and the access permission of the access terminal, so that leakage of sensitive data can be effectively avoided.
Owner:北京以弈信息技术有限公司

Ball valve

The invention belongs to the technical field of pipeline valves and discloses a ball valve. The ball valve comprises a valve body, a valve ball, a driving shaft, a first inlet valve seat, a first outlet valve seat, a second inlet valve seat and a second outlet valve seat; the first inlet valve seat and the first outlet valve seat are located at the inlet position and the outlet position in the valve body respectively and form normal contact sealing with the valve ball; the second inlet valve seat and the second outlet valve seat are located at the inlet position and the outlet position in the valve body respectively and form selective contact sealing with the valve ball; and when the sealing between the first inlet valve seat and / or the first outlet valve seat and the valve ball fails, the second inlet valve seat and the second outlet valve seat respectively move relative to the valve body and respectively form contact sealing with the valve ball. According to the ball valve provided by the invention, double-seal switching can be achieved, the anti-leakage effect is improved, and the ball valve has the longer service life.
Owner:任林赟

Concrete gap repairing and anti-seepage treatment method

The invention belongs to the technical field of gap anti-seepage repairing, and particularly relates to a concrete gap repairing and anti-seepage treatment method. The concrete gap repairing and anti-seepage treatment method comprises the following specific steps of S1, forming a pouring pit in one end of a gap, specifically, the pouring pit is formed between delayed coagulation soil structures on two sides, the pouring pit is located at the upper end of the gap between the delayed coagulation soil structures on the two sides and is in a symmetrical arc shape, and a sealing flange is reserved on the inner wall of the upper side of the pouring pit; S2, forming an anti-leakage groove in the upper portion of the pouring pit; S3, repairing material pouring; and S4, filling and paving an anti-leakage layer. Through cooperation of the pouring pit and the anti-seepage groove, construction is conducted in two steps, the construction effect is improved, different raw materials are adopted in different steps, and the anti-seepage performance of the repaired concrete can be remarkably improved; and through the arrangement of structures such as a closed inner groove, the leakage condition is blocked from a physical structure.
Owner:上海致同建设工程科技有限公司

Metal gasket

The invention discloses a metal gasket. More than one layer of metal fiber filaments distributed uniformly in a net shape is arranged in a metal material of the metal gasket, and a hemispherical concave part is arranged on a sealing surface of the metal gasket. By adding the metal fiber filaments, the anti-flushing strength of the auxiliary metal gasket can be remarkably improved, the service life of the whole sealing gasket is prolonged, and leakage resistance of connection of sealing elements is effectively improved.
Owner:NANTONG YAOSHENG STEEL STRUCTURE
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