53results about How to "To achieve the purpose of blocking" patented technology

The invention requests to protect a system and method for controlling untrusted resource transmission in Internet of vehicles. The method comprises the following steps: designing an access control strategy and a node trust value calculation method for nodes of a resource output vehicle, limiting fixed attributes and dynamic attributes of the resource output vehicle, and dynamically generating a fine-grained access control strategy according to the traveling track of the vehicle to ensure that the access control strategy has better extensibility and flexibility. Thereby, the anonymous directional transmission of messages can be achieved, the waste of resources can be reduced, and the identity privacy of communication vehicles can be effectively protected; the calculation of node trust values can guarantee the trust degree of resource communicators and meet the security and privacy requirements of security related messages in Internet of vehicles; and malicious nodes can be effectively identified, and the injection of malicious resources and the transmission of untrusted resources can be prevented. The method disclosed by the invention can be widely applied to the related fields of mobile Internet, wireless sensor network and the like.

The invention relates to a pipeline plugging device. The pipeline plugging device comprises a supporting rod, an expansion ring and a sealing hood, wherein the right end of the supporting rod is provided with a fixed ring, and the middle portion of the supporting rod is provided with a sliding ring; the expansion ring comprises first arc-shaped parts and second arc-shaped parts which are alternately distributed in the circumferential direction, the first arc-shaped parts are provided with guiding portions, the side faces, corresponding to the two ends of the first arc-shaped parts, of the guiding portions are guiding faces, the guiding faces are provided with sliding grooves, the two side walls of the sliding grooves are provided with guiding holes, the guiding holes in the adjacent firstarc-shaped parts form shapes like a Chinese character 'ba', the second arc-shaped parts are provided with support lugs, the support lugs are correspondingly hinged to the fixed ring and the sliding ring through first connection rods and second connection rods, the two ends of the second arc-shaped parts are provided with sliding blocks located inside the sliding grooves correspondingly, and the two sides of the sliding blocks are provided with guiding columns located inside the guiding holes correspondingly; and the sealing hood is sleeved on the expansion ring from right to left and is fixedly connected with the first arc-shaped parts correspondingly. The pipeline plugging device has the advantages of being simple in structure, convenient to operate and control, reliable in plugging and high in adaptability, equal-diameter holes do not need to be arranged in a pipeline, and the operating efficiency is improved.

The invention relates to a pipeline blocking device which comprises a first supporting rod, a second supporting rod, an expansion ring and a sealing cover. The first supporting rod is hinged to the second supporting rod. A drive ring, a support and a pull rod are arranged on the first supporting rod. A fixing ring and a sliding ring are arranged on the second supporting rod, and the sliding ring is connected with the pull rod through a transmission rod. The expansion ring comprises first arc parts and second arc parts, wherein the first arc parts and the second arc parts are distributed alternately. Symmetric guide faces are arranged on guide parts of the first arc parts, and sliding grooves and guide holes are formed in the guide faces. The guide holes in the adjacent first arc parts forma splay shape, and supporting lugs are arranged on the second arc parts. The supporting lugs are correspondingly hinged to the fixing ring and the sliding ring through first connecting rods and second connecting rods. Sliding blocks located in the sliding grooves are arranged at the two ends of the second arc parts, and guide pillars located in the guide holes are arranged on the two sides of thesliding blocks. The sealing cover is arranged on the expansion ring in a sleeving manner from right to left and is fixedly connected with the first arc parts. The pipeline blocking device has the beneficial effects that the structure is simple, control is convenient, adaptability is high, and blocking is reliable.

The invention discloses a cleaning brush assembly and a wafer cleaning device, the cleaning brush assembly comprises a cleaning brush and a liquid inlet mechanism connected to one end of the cleaning brush, and the liquid inlet mechanism comprises a liquid inlet end cover, a follow-up shaft and a bearing assembly; the liquid inlet end cover is provided with a liquid inlet end, one side of the liquid inlet end cover is provided with an extending thin shaft and an annular side wall surrounding the thin shaft, an annular groove is formed between the thin shaft and the annular side wall, and the thin shaft is hollow and is communicated with the liquid inlet end through a first passage in the liquid inlet end cover; one end of the follow-up shaft is arranged on the peripheral side of the thin shaft in a sleeving mode and stretches into the annular groove so that the thin shaft can be inserted into a center through hole of the follow-up shaft, the other end of the follow-up shaft stretches into the cleaning brush, and the center through hole penetrates through the follow-up shaft so that the first channel can be communicated with the cleaning brush, and therefore liquid can be led into the cleaning brush; and the bearing assembly is arranged on the peripheral side of the follow-up shaft in a sleeving mode.

The invention relates to the technical field of valves, in particular to a throttle valve and a hydraulic system. The throttle valve includes a valve body and a valve element; the two ends of the valve body are provided with a first valve port and a second valve port, the valve element includes a first end portion adjacent to the first valve port, a second end portion adjacent to a second valve port and a main body portion, and the valve element is provided with a throttle passage; when liquid flows from the first valve port to the second valve port, the second end portion can abut against the second valve port, one end of the throttle passage is in communication with the first valve port through an inner cavity of the valve body, and the other end of the throttle passage is in communication with the second valve port; and when the liquid flows from the second valve port to the first valve port, the first end portion can abut against the first valve port and seal the first valve port. The hydraulic system includes the above throttle valve. According to the throttle valve and the hydraulic system, throttle of the liquid flowing from the first valve port to the second valve port can be carried out, the liquid flowing from the second valve port to the first valve port can be blocked, and the compactness is further improved easily.

The invention discloses a blockage-removing type liquid gasification nozzle. A mixing opening is formed in one side of a column core, the other side of the column core is provided with a communicating opening, the communicating opening and the mixing opening are symmetrically arranged, spray heads are arranged at the positions, corresponding to the mixing opening and the communicating opening, of a rotating over, the mixing opening communicates with the communicating opening through a connecting air channel, the communicating opening communicates with an air inlet channel, the mixing opening communicates with a water inlet channel, a blockage removing mechanism is arranged at the position, corresponding to the communicating opening, of the rotating cover, and the blockage removing mechanism is matched with the spray heads. According to the nozzle, the rotating shaft drives an umbrella-shaped cover body to quickly rotate under the action of a coil spring, so that the corresponding spray head of the rotating over at the communication opening instantly rotates to the mixing opening to complete the replacement of the spray heads, the water pressure of the water inlet channel is restored to be normal, a valve block of the connecting rod is reset, the end head of a positioning rod is stuck with a corresponding second block, the blockage of the blocked spray head is removed at the blockage removing mechanism, so that the purpose of the blockage removing of the interior of the nozzle is achieved, and therefore the spraying effect is improved, and the stability of continuous working of the nozzle is guaranteed.

The invention relates to a shallow-layer plugging agent. Oil-well cement is used as a substrate, a fluid loss agent, a dispersant, an active agent and a modifier are added, the plugging agent is mainly characterized in that additives are used for changing conventional cement paste performance, so that the construction requirement of plugging, perforation plugging and non-plug perforation plugging is met, in the plugging construction process, a specific construction technology is adopted, the one-time plugging success rate is increased effectively, shallow-layer plugging agent slurry in casings can be circulated out of the ground, and plugging agent plugs are not reserved.

The invention discloses a reusable expansion-type paste drilling-hole sealing material based on coal gangue powder. The material comprises a hole-sealing dry-mixed material and a hole-sealing wet-mixed compound, and the dry-mixed material comprises the following components: 7.5-8 parts of coal gangue powder, 0.08-0.1 part of a silicate, 0.08-0.1 part of an expanding agent, 0.3-0.35 part of cellulose, 1.49-1.55 parts of a water-retaining agent, 9-9.5 parts of water, 0.18-0.2 part of a coupling agent and 0.54-0.57 part of resin. The reusable expansion-type paste drilling-hole sealing material provided by the invention can permeate into small cracks around drilling holes under the action of grouting pressure for achieving the purpose of plugging; the cellulose prepared by mixing methyl cellulose and hydroxyethyl cellulose is adopted, so that the viscosity of the system and the stability of the prepared paste are improved; and a super absorbent polymer (SAP) is used as the water-retainingagent, so that water is not easily lost, and the purpose that the material can be expanded again by water injection when water is lost can be achieved.

The invention discloses a self-closing valve of a gas pipeline. The self-closing valve comprises a valve body. A channel where gas passes through is arranged in the valve body in a through manner, a metal pull rod capable of moving up and down is arranged in the channel, a first magnet capable of moving up and down is arranged in the channel, the first magnet is located below the pull rod and is fixedly connected to a clamping seat through a screw, a notch is formed in the clamping seat, a second magnet is fixedly connected in the notch, the pull rod is connected to the first magnet, the second magnet and the clamping seat by means of a magnetic force, a sealing part capable of closing the channel is arranged in the channel, and one end of the sealing part is fixedly connected to a third magnet. By arranging a series of structures, in the using process of the self-closing valve, the valve body is closed when a gas pressure is greater than a set maximum value and smaller than a set minimum value and a flow is greater than a set maximum value. When the pipeline pressure is greater than a set opening pressure, a gas inlet is not opened, so that the safety performance of the self-closing valve during use is guaranteed.

The invention provides a leak-proof steel structure and a leak-proof steel process of a steelmaking converter bottom. The leak-proof steel process of the steelmaking converter bottom comprises the following steps that chromium corundum ramming mixes are poured at joint inner walls of a converter bottom working layer and a blank pressing part working layer after a converter molten pool is built, and a circular ring beam structure is formed and natural curing is carried out for 48 hours; a coke furnace is hung, then slag materials of cokes which are burnt are attached on the inner surface of a magnesium carbon brick working layer to form a coke slag material layer, and molten iron permeates the coke slag material layer to enter into the circular ring beam structure when a converter starts to smelt first furnace steels, so that the coke slag material layer and the circular ring beam structure are firmly combined with the magnesium carbon brick working layer of the converter to form a whole body to fully seal connecting parts of the converter bottom working layer and a converter body working layer. According to the invention, the circular ring beam structure, a slag material layer and a furnace lining magnesia carbon brick are combined into a whole through the molten steel, thereby sealing steel-leaking channels of blank pressing parts completely to avoid molten steel penetration, steel clamping phenomena and steel leakage accidents.

The invention relates to a self-diversion gas pipeline plugging device which comprises a supporting rod, an expansion ring, a left sealing cover and a right sealing cover, a motor and a plugging disc are correspondingly fixed to the two ends of the supporting rod, a left sliding ring and a right sliding ring are arranged on the supporting rod, a transmission mechanism and a diversion pipe are arranged in the supporting rod, and the transmission mechanism enables the left sliding ring and the right sliding ring to slide reversely; the expansion ring is composed of first arc-shaped pieces and second arc-shaped pieces which are distributed alternately, guide faces are arranged at the two ends of each first arc-shaped piece, sliding grooves are formed in the guide faces, guide holes are formed in the side walls of the sliding grooves, the guide holes in the adjacent first arc-shaped pieces are in a splayed shape, and the second arc-shaped pieces are hinged to the left sliding ring and the right sliding ring through symmetrically-distributed connecting rods. Sliding blocks matched with the sliding grooves are arranged at the two ends of the second arc-shaped piece, guide columns located in the guide holes are arranged on the two sides of the sliding blocks, the two ends of the left sealing cover are correspondingly connected with the left sliding ring and the expansion ring, and the two ends of the right sealing cover are correspondingly connected with the right sliding ring and the expansion ring. The device has the advantages of compact structure, sensitive action and reliable plugging.

The invention discloses an anti-theft lockset, which is mainly characterized in that lock plungers (14) are arranged at two sides of a lock core mounting hole (9) of a base (11), a tabular lock tongue (19) is arranged between the two lock plungers, the lock plunger contacts a footstock (10) inside the lock base by a lock plunger spring (18), projecting parts (3) are arranged symmetrically on a lock core shell (2) in axial direction, steps (24) are arranged at the ends opposite to the lock plungers at the two sides of the lock core mounting hole (9), the two steps form a faucet (25), when the lock core shell (2) is installed inside the lock core mounting hole, the projecting part of the lock core shell (2) is positioned outside the faucet formed by the two steps. Regarding the anti-theft lockset of the structure, when a lock is opened by force, the projecting part on the lock core shell thereof locks the lock plunger, the lock can not be opened no matter how strong a force is, the anti-theft lockset has strong anti-theft performance and extremely suits lock of motor vehicles, factory gates and the like.

The invention relates to a dual-seal gas pipeline plugging device based on electric drive, which comprises a steering assembly and a plugging assembly, the steering assembly comprises a first support rod, a steering slip ring and a steering push-pull rod, the plugging assembly comprises a second support rod, an expansion ring, a left sealing cover, a right sealing cover and a motor, and the motor is hinged to the first support rod and the steering push-pull rod. A left sliding ring and a right sliding ring are arranged on the second supporting rod, a plugging transmission mechanism connected with a motor is arranged in the second supporting rod, the plugging transmission mechanism drives the left sliding ring and the right sliding ring to slide reversely, a flow guide pipe is further arranged in the second supporting rod, and the expansion ring is formed by combining first arc-shaped pieces and second arc-shaped pieces which are distributed alternately. The left end of the left sealing cover is in sealing connection with the left sliding ring, the right end of the left sealing cover is sleeved on the expansion ring and connected with the first arc-shaped piece, the right end of the right sealing cover is in sealing connection with the right sliding ring, and the left end of the right sealing cover is sleeved on the expansion ring and connected with the first arc-shaped piece. The device has the advantages of compact structure, sensitive action and reliable plugging.

The invention discloses a wet blank transfer arm structure. The wet blank transfer arm structure comprises a wet blank transfer arm, an arc-shaped guide follow-up mechanism, a wet blank adsorption mold and a lifting driving mechanism; first guide wheels and second guide wheels are respectively matched with a first arc-shaped rail and a second arc-shaped rail to form an arc-shaped kinematic pair; the wet blank adsorption mold is fixedly connected with the bottom surface of an arc-shaped guide plate; when the wet blank adsorption mold is subjected to an external force in the horizontal direction, the wet blank adsorption mold is restrained by the arc-shaped kinematic pair, that is, the wet blank adsorption mold horizontally moves relative to the wet blank transfer arm according to the tracksof the arc-shaped rails; and the lifting driving mechanism is used for driving a lifting mounting plate to do lifting motion in the vertical direction, and the lifting mounting plate drives the arc-shaped guide plate and the wet blank adsorption mold to do lifting motion in the vertical direction. The wet blank transfer arm structure provided by the invention has the function of ascending and descending in the vertical direction, meanwhile, the wet blank adsorption mold can horizontally move under the action of an external force in the horizontal direction, a follow-up guiding function is achieved, and meanwhile the structure has the advantages of low manufacturing and maintaining cost and small space occupation.

The invention discloses a blockage prevention and removal control device and method based on a differential type large blast furnace injection system. According to the method, in the normal working process of the system, when pulverized coal accumulation or pulverized coal adhesion occurs in a coal conveying pipeline, friction rise exists in the coal conveying pipeline, so that phase deviation occurs to waveforms acquired by a pressure sensor at a discharge port, and meanwhile, the sine wave amplitude of the discharge port is reduced; the control device analyzes and calculates the acquired pressure data curves of a feed opening and the discharge port, calculates real parts, imaginary parts and effective values of the two curves in a phasor mode, and calculates a phase angle between the two curves according to the phasor; and when the obtained effective value and the phase angle both exceed preset threshold values, it is judged that the pipeline is blocked, and the control device controls the injection system to conduct blockage removal action. The device and the method have the characteristics of high reliability, high acquisition precision, high sampling speed, high action sensitivity, capability of pre-judging the coal conveying pipeline in advance, short blockage removal action time and the like.

The invention discloses a magnetic lock cylinder. The magnetic lock cylinder comprises a lock shell. A lock core hole is formed in the lock shell. A lock core is rotatably arranged in the lock core hole. A key hole allowing a key to be inserted is formed in the lock core in the axial direction. A plurality of side bead holes communicated with the key hole are formed in the lock core in the radialdirection. The key is provided with a plurality of tooth grooves inclined at different angles or the same angle relative to the length direction of the key. Side beads capable of being matched with the tooth grooves in a one-to-one correspondence mode are movably arranged in the side bead holes, and an inclined part with the same inclination angle as the tooth groove correspondingly matched with the side bead is arranged at the head end of each side bead. A clamping groove is formed in the side wall of the lock core hole. First springs for driving the tail ends of the side beads to be clampedinto the clamping groove when the lock cylinder is in a locked state are arranged in the side bead holes. Magnetic beads are embedded into the key, and the magnetic force of the magnetic beads for adsorbing the side beads is larger than the elastic force of the first springs. The magnetic lock cylinder has higher safety coefficient, the key has a much larger keycode base, and technical opening oflawbreakers is more effectively prevented.