41results about How to "Does not affect connectivity" patented technology

The invention relates to the dustproof and vacuum pumping hardware of an optical system, in particular to an optical lens with a dustproof and vacuum pumping function. The optical lens comprises a lens cone, a vent hole, and a dustproof component, wherein the vent hole is arranged on a lens cone wall; and the dustproof component is arranged on the vent hole and is made of a cellular material. The optical lens has the good exhaust performance and the effective dustproof and vacuum pumping function.

The utility model discloses a method for the dynamic update of the address list of the stream control transport protocol, comprising the following steps: after a stream control transmission coupling is built, the end in which an IP address list changes is as a sender; the sender calls heart-beat detection primitive; the IP address list information needed to update is arranged in the parameter of the heart-beat detection primitive; the IP address list information comprises an updating address number, an updating mode and an IP address needed to update; the heart-beat detection information is built by the sender, and a flag field is arranged by the sender to indicate whether the receiver need to update the IP address list received from the sender; the change of the IP address is written in the information field of the heart-beat detection information by the sender, and the information field is sent to the receiver; the maintained IP address list needed to update is judged by the receiver according to the flag field of the heart-beat detection information, and the maintained IP address list is updated by the receiver according to the information field. In this way, the dynamic modification of the IP address list in both ends of the coupling is feasible without disconnecting the coupling.

The invention discloses an ultrasonic dental unit without tooth damage. The ultrasonic dental unit without tooth damage comprises a handle case and an energy converter arranged in the case, wherein the front end of the energy converter is fixedly connected with the first end of an amplitude change rod; the second end of the amplitude change rod extends to a position outside the case; the second end of the amplitude change rod is connected with a work point for cleaning teeth; the work point at least comprises a first work body and a second work body; the first work body and the second work body are integrally shaped or fixedly connected into a whole to form the work point with regions with different hardness. The ultrasonic dental unit also comprises an image collecting device, wherein theimage collecting device is connected with the tooth cleaning handle through a shape-changeable connecting device. Through the structural design of the amplitude change rod, the design of the work point, and the improvement of an image pick-up device and connection device, the safety and the comfort degree of the tooth cleaning equipment are integrally improved, so that the tooth cleaning handle can be more easily operated and used by an ordinary user; the healthy tooth caring mode of tooth cleaning can be completed in a self-help way at home.

The invention discloses a multilayer testing sampling valve. The multilayer testing sampling valve comprises a mandrel and a shell; the shell is shaped like a cylinder, a channel with a flared section is formed in the lower section of an inner cavity of the shell, a through hole matched with the outer diameter of the mandrel is formed in the top end of the shell, the mandrel with a main liquid channel penetrates through the through hole, two o-shaped sealing rings are embedded in the inner wall of the through hole, the sealing effect is achieved when the mandrel moves up and down in the through hole, a convex ring matched with the inner cavity of the shell is formed on the outer wall, on the lower half part, of the mandrel, two o-shaped sealing rings are embedded in the outer peripheral face of the convex ring, the mandrel, the convex ring and the inner cavity of the shell can form a closed sampling cavity, a mandrel side opening is formed in the side face of the upper portion of the mandrel, when the bottom of the convex ring is located at the bottom of the inner cavity above the flared section, the mandrel side opening is just located between the o-shaped sealing rings of the through hole in the top end of the shell, and the sampling cavity is a closed cavity. According to the multilayer testing sampling valve, switching-on and switching-off are only for a single layer and do not affect communication of a main runner.

The invention relates to the field of medical apparatuses, and discloses a portable slipper for operations. The slipper comprises a slipper body by using an EVA texture, the slipper body comprises a slipper top and a slipper sole, and a cushion is fixed to the inside of the shoe sole; the cushion is wrapped with a wearable portion, an inflator is arranged inside a first cavity, and a foot entranceis formed in the top of the slipper body; the foot opening of the slipper body is enclosed by a foot protecting air bag, the foot protecting air bag is communicated with a communicated pipe, and an air inlet pipe is installed on the slipper sole; the air inlet pipe is inserted inside the communicated pipe, the inflator is communicated with a flexible pipe, and the flexible pipe is communicated with the air inlet pipe; a one-way valve is arranged on the air inlet pipe, a limiting opening is formed in the inflator wall, and an inserting hole is formed in the slipper sole, and a limit rod is used for being inserted inside the limiting opening; compared with the prior art, the slipper body adopts the EVA material and is integrally made, water resistance and resistance of sharp device puncturing are achieved by arranging the foot protecting air bag, a better insulation effect is achieved, safety of medical workers is achieved, blood contaminating the slipper is avoided, injuring the humanskin is avoided, and the slipper is applicable to outdoor operations of the medical workers.

The invention discloses an electrowetting device with a spacer and a preparation method of the electrowetting device. The method comprises the steps of firstly taking a space material, carrying out thermocuring under yellow light and grinding to obtain spacer microspheres; spraying the spacer microspheres on a coated pixel wall material, curing the pixel wall material, and carrying out once photoetching to prepare a pixel wall and a spacer at the same time; and removing the spacer microspheres sprayed in an un-photoetched curing area in the developing process and only leaving partial structure of the microspheres in a photoetched curing area. When an upper substrate and / or lower substrate deforms, the spacer is in contact with the upper substrate and inter collapse of the electrowetting device can be effectively prevented. The spacer is obtained through photoetching the microspheres, so that the spacer does not affect the connectivity of a polar electrolyte solution; the pixel wall and the spacer are obtained through one-step photoetching, so that an error chain caused by twice photoetching alignment is avoided in comparison with the spacer prepared through twice photoetching, and the electrowetting device is higher in precision, simpler in process and lower in operation difficulty.

The invention belongs to the technical field of coal bed gas well cementation, and specifically relates to a selective segmented well cementing technology of a double-target layer coal bed gas well and a well structure. The upper and lower intervals of two target coal beds are sealed and cemented by one-time well cementation; the well structure with target coal beds having set sliding sleeves inside and without cementing the well, and the corresponding process reduce reservoir stratum pollution and improve the permeability. The selective segmented well cementing technology has the advantages that (1). the sliding sleeves are set in coal bed sections without well cementing, so that the pollution of well cementing cement rings to coal beds is reduced, and meanwhile the coal beds can be prevented from collapsing into a shaft; (2). the one-time well cementation realizes the cement well cementation in the non-coal bed section, prevents a water-rich stratum from affecting the subsequent drainage, and meanwhile maintains the original permeability of the coal bed section; (3). the second-section well structure has a simple structure, downhole materials are set at one time, and the operation efficiency is high; (4). compared with the technical scheme with CN104481468B, the selective segmented well cementing technology does not sand filling and sand flushing, does not cause reservoir stratum turbulence and reduces the permeability of near-wellbore areas; and (5). the sliding sleeves are set in the coal bed sections in advance, and the subsequent fracturing construction does not require perforation.

The invention discloses a digital trunked communication system based location updating method and system. The method includes that a PDS (PTT dispatching server) receives a trunked starting-up location registration request message, location updating request message or trunked shutdown location registration request message reported by a trucking terminal through an evolved base station (eNodeB), the received request message is sent to a PHR (PTT home register), and the PHR records terminal location information carried in the request message; the PDS receives a trunked starting-up location registration response message, location updating response information or trunked shutdown location registration response message returned by the PHR, and the response message is sent to the trunking terminal through the eNodeB. By the method and system, terminal location updating in an LTE (long term evolution) based digital trunked communication system is realized.

The invention provides an air seal offset type bell valve which comprises a valve body, a valve plate and an inflation seal ring, wherein the valve body is provided with a feed opening and a discharge opening, a rotating shaft is penetrated in the valve body, a crank shaft rod is connected onto the rotating shaft, and a buckle ring is connected to a wall of the valve body outside the feed opening; the valve plate is connected onto the crank shaft rod, and a valve plate cover is arranged at the feed opening in a covering manner; and the inflation seal ring is provided with an inflation cavity, and the inflation seal ring is arranged on the buckle ring in a sleeving manner. According to the air seal offset type bell valve, the inflation seal ring can be contacted sufficiently with the valve plate after being inflated, so that a good sealing effect between the valve plate and the feed opening of the valve body is guaranteed.

The invention discloses a microwave conversion joint wiring terminal. The wiring terminal comprises a wiring jack and a plug board. The wiring jack is plugged into a vehicle PVC panel through the plug board. The wiring jack is internally provided with a copper core used for plugging the PVC panel. The wiring jack is further connected with a fixed plate which is vertical to an axial center line of the wiring jack. The fixed plate is provided with a screw hole, and is fixedly connected to a vehicle PVC assembly by passing a bolt through the screw hole. The fixed plate is additionally arranged on an original plug board on which the wiring terminal is plugged into the PVC panel, and the wiring terminal is firmly fixed by passing the bolt through the screw hole. When a wiring terminal corresponding to a microwave conversion joint is repeatedly plugged, a PVC plate circuit is stably connected by the copper core without influencing circuit connection between the wiring terminal and the PVC panel. The wiring terminal has the advantages of being simple in structure, convenient to process and manufacture, resistant to plugging, not easy to fall off and break a circuit, safe to use, stable and the like.

The invention relates to the technical field of greenhouse vegetable insecticide spraying, and discloses a fixed greenhouse vegetable insecticide spraying device. The spraying device comprises an outer box and a liquid guide pipe, wherein the top of the outer box communicates with a liquid adding pipe, two distributed sliding grooves are formed in the inner bottom wall of the outer box, two sliding blocks are arranged on the sliding grooves in a sliding mode, a same material mixing box is fixedly mounted between the sliding blocks on the two sliding grooves, a through groove is formed in the top of the material mixing box, the lower end of the left side wall of the material mixing box communicates with a first telescopic hose, the left end of the first telescopic hose communicates with the right end of a liquid guide pipe penetrating through the outer box, the liquid guide pipe communicates with a water pump, a plurality of spraying mechanisms are arranged on the outer circumferential surface of the liquid guide pipe, and a motor is fixedly mounted at the top of the outer box. The spraying device solves the problems that an existing greenhouse vegetable insecticide is sprayed by manually holding a spraying pipe, the efficiency is low, meanwhile, the labor intensity is high, and the later-stage insecticide effect is poor due to uneven spraying.

The invention relates to the technical field of mahjong machines, especially to a shuffling and middle lifting device of the mahjong machine. The shuffling and middle lifting device of the mahjong machine comprises a shuffling mechanism and a middle lifting mechanism, and the shuffling mechanism comprises a large disc driving assembly, a large disc, a tile poking device and a fixing base. The middle lifting mechanism comprises a middle lifting driver, a lifting rod and a control panel; the middle of the large disc arches upwards; an accommodating space is formed between the upward arch in themiddle of the large disc and the bottom plate; the fixing base, the large disc driving assembly and the medium lifting driver are all located in the accommodating space, an inner gear ring is arrangedon the large disc, the large disc driving assembly comprises a large disc driver and a speed reducer, the speed reducer comprises an input gear and an output gear, the large disc driver drives the input gear to rotate, and the output gear is meshed with the inner gear ring of the large disc. According to the scheme, the problem that in the prior art, a mahjong machine is large in size due to thefact that a large-disc motor is installed on the bottom plate at the bottom of a box is solved.

The invention discloses a power supply connector composed of a plug and a jack, wherein the plug is a cylinder provided with an insulation cylinder core, and the jack is a cylinder-shaped hole. The power supply connector is characterized in that two or three electrodes are arranged along the direction of the insulation cylinder core. Three electrodes are embedded in the wall of the insulation hole along the direction of the cylinder shaft. Thus, the single jack is general for both a two-electrode plug and a three-electrode plug. The invention also provides a power supply socket comprising a housing and jacks. The housing arranges and fixes a plurality of the jacks serving as independent components, and pins in the same position of the jacks are connected in series by leads in the housing. Two or three electrodes of the invention are vertically distributed on the cylinder plug, so that the plug of both two and three electrodes can be inserted into unified jacks with three electrodes, thus overcoming the problem that the traditional plug and socket with two jacks and three jacks cannot be used universally.

The invention discloses a power supply connector composed of a plug and a jack, wherein the plug is a cylinder provided with an insulation cylinder core, and at least two electrodes are sheathed on the insulation cylinder core along the direction of a cylinder shaft; the jack is a cylinder-shaped hole, and at least two electrodes are embedded in the insulation hole wall along the direction of the cylinder shaft; the electrodes in the jack correspond to the electrodes on the plug, and the electrodes in the corresponding position thereof form electrical connection after the plug is inserted into the jack. A power supply socket is composed of a housing and jacks, wherein the housing arranges and fixes a plurality of the jacks serving as independent components, and pins in the same position of the jacks are connected in series by leads in the housing. Two or three electrodes of the invention are vertically distributed on the cylinder plug, so that the plug of both two and three electrodes can be inserted into unified jacks with three electrodes, thus overcoming the problem that the traditional plug and socket with two jacks and three jacks can not be used universally.

The invention belongs to the field of communication equipment, and particularly relates to an extensible cabinet power distribution unit which comprises a bottom box, a main input module, a pluralityof copper bar limiting assemblies, copper bars and a plurality of extension modules, the main input module is installed in the bottom box in a matched mode, and the copper bar limiting assemblies arelaid in the bottom box. The copper bar is limited by the copper bar limiting assemblies and is electrically connected with the main input module, the extension modules are laid in the bottom box, eachextension module can be independently plugged in and pulled out of the bottom box, and each extension module is provided with a power socket and a plugging piece used for being electrically connectedwith the copper bar. The modular design is adopted, the extension modules can be increased or decreased according to needs, and connection of circuits of other extension modules is not affected by loss of any module.

The invention discloses a fixing and protecting apparatus for an isolating switch secondary mechanism, and relates to the technical field of electric power device protection. The fixing and protecting apparatus includes an isolating switch secondary mechanism and cables which are arranged on two sides of the isolating switch secondary mechanism and are connected to the insulating switch secondary mechanism. A protecting apparatus is provided with a through hole which penetrates the main body of the protecting apparatus and is intended for passage of the cables. The two sides of the protecting apparatus are provided with two cone-shaped grooves which are in communication via the through hole. End parts of two cables extend to the cone-shaped grooves. The insulating switch secondary mechanism is connected to one cable and is disposed at the cone-shaped groove on one side. The cable which is connected to the insulating switch secondary mechanism penetrates the through hole and is connected to the cable which is on the other side of the protecting apparatus. The design of the protecting apparatus enables complete isolation of the insulating switch secondary mechanism, thus realizing effective protection of the insulating switch secondary mechanism. The design of a fixing apparatus enables effective fixing of the cables. The design of T-shaped clamping blocks and an anti-skid ring enable the cables to bear a certain force of drawing and pulling without effecting connecting performances of the insulating switch secondary mechanism.

The invention provides a method for reducing a specific absorption rate. The method comprises: when a voice task is detected, a first antenna is used as a diversity receiving antenna and a second antenna is used as a transmitting antenna; when a data task is detected, the first antenna is used as a transmitting antenna and the second antenna is used as a diversity receiving antenna. The first antenna is arranged at the top of a mobile terminal and the second antenna is arranged at the bottom of the mobile terminal. Therefore, the first antenna and the second antenna are invoked according to the current state of the terminal; and the two antennas can be used as a receiving antenna and a transmitting antenna respectively instead of being used as receiving antennas or transmitting antennas simultaneously when the mobile terminal is processing either a voice service or a data service, so that the specific absorption rate (SAR) value can be reduced. While the SAR value is reduced, the antennas can work normally; and thus the wireless connection performance is not affected when the SAR value is reduced.

The invention relates to the field of medical apparatuses, and discloses a portable slipper for operations. The slipper comprises a slipper body by using an EVA texture, the slipper body comprises a slipper top and a slipper sole, and a cushion is fixed to the inside of the shoe sole; the cushion is wrapped with a wearable portion, an inflator is arranged inside a first cavity, and a foot entranceis formed in the top of the slipper body; the foot opening of the slipper body is enclosed by a foot protecting air bag, the foot protecting air bag is communicated with a communicated pipe, and an air inlet pipe is installed on the slipper sole; the air inlet pipe is inserted inside the communicated pipe, the inflator is communicated with a flexible pipe, and the flexible pipe is communicated with the air inlet pipe; a one-way valve is arranged on the air inlet pipe, a limiting opening is formed in the inflator wall, and an inserting hole is formed in the slipper sole, and a limit rod is used for being inserted inside the limiting opening; compared with the prior art, the slipper body adopts the EVA material and is integrally made, water resistance and resistance of sharp device puncturing are achieved by arranging the foot protecting air bag, a better insulation effect is achieved, safety of medical workers is achieved, blood contaminating the slipper is avoided, injuring the humanskin is avoided, and the slipper is applicable to outdoor operations of the medical workers.

The invention relates to the technical field of hydraulic engineering, in particular to a pump station installation supporting structure for special geology and an adjusting method.The pump station installation supporting structure comprises a pump station body and a fixing ring, hydraulic telescopic rods are evenly installed on the outer side of the fixing ring, vertical rods are installed at the other ends of the hydraulic telescopic rods, and fixing holes are formed in the top ends of the vertical rods; a groove is formed in one side of the fixing ring, the groove is formed in the outer side of the pump station main body water pipe, a connecting pipe structure is installed at the other end of the groove, and a bending detection switch is installed on the inner side of the connecting pipe structure; according to the invention, through the arrangement of the pump station main body, the fixing ring, the vertical rod, the hydraulic telescopic rod and the like, the pump station main body can be well supported and fixed, and the subsequent inclined pump station main body can be conveniently adjusted and used, so that the use stability of the pump station main body is ensured.

The invention discloses a fixing and protecting apparatus for an isolating switch secondary mechanism, and relates to the technical field of electric power device protection. The fixing and protecting apparatus includes an isolating switch secondary mechanism and cables which are arranged on two sides of the isolating switch secondary mechanism and are connected to the insulating switch secondary mechanism. A protecting apparatus is provided with a through hole which penetrates the main body of the protecting apparatus and is intended for passage of the cables. The two sides of the protecting apparatus are provided with two cone-shaped grooves which are in communication via the through hole. End parts of two cables extend to the cone-shaped grooves. The insulating switch secondary mechanism is connected to one cable and is disposed at the cone-shaped groove on one side. The cable which is connected to the insulating switch secondary mechanism penetrates the through hole and is connected to the cable which is on the other side of the protecting apparatus. The design of the protecting apparatus enables complete isolation of the insulating switch secondary mechanism, thus realizing effective protection of the insulating switch secondary mechanism. The design of a fixing apparatus enables effective fixing of the cables. The design of T-shaped clamping blocks and an anti-skid ring enable the cables to bear a certain force of drawing and pulling without effecting connecting performances of the insulating switch secondary mechanism.

The invention discloses a programmable modularized PDMS (Polydimethylsiloxane) microfluidic chip mold system and belongs to the technical field of microfluidics. A plurality of silicon chip mold module mounting areas are arranged on a mold assembling platform; a plurality of bosses are arranged in the middle of the different mounting areas; processed micro structures are arranged on silicon chips;a plurality of silicon chip mold modules with different micro structure patterns are mounted on the mold assembling platform through the bosses. By adopting the system, molds for manufacturing PDMS microfluidic chips are designed and manufactured in a modularization manner, microfluidic chip mold modules with different functions are processed by using the silicon chips, the silicon chips are further arranged and combined by using the mold assembling platform to form a microfluidic chip system mold with complex functions, and finally microfluidic chips are manufactured from PDMS through mold reversing. By adopting the system, the flexibility of the microfluidic chip processing process can be remarkably improved, the chip processing cost can be remarkably reduced, the processing process issimple to operate, and the system is applicable to microfluidic chip manufacturing with single or complex functions on the basis of PDMS materials.

The invention discloses a multilayer testing sampling valve. The multilayer testing sampling valve comprises a mandrel and a shell; the shell is shaped like a cylinder, a channel with a flared section is formed in the lower section of an inner cavity of the shell, a through hole matched with the outer diameter of the mandrel is formed in the top end of the shell, the mandrel with a main liquid channel penetrates through the through hole, two o-shaped sealing rings are embedded in the inner wall of the through hole, the sealing effect is achieved when the mandrel moves up and down in the through hole, a convex ring matched with the inner cavity of the shell is formed on the outer wall, on the lower half part, of the mandrel, two o-shaped sealing rings are embedded in the outer peripheral face of the convex ring, the mandrel, the convex ring and the inner cavity of the shell can form a closed sampling cavity, a mandrel side opening is formed in the side face of the upper portion of the mandrel, when the bottom of the convex ring is located at the bottom of the inner cavity above the flared section, the mandrel side opening is just located between the o-shaped sealing rings of the through hole in the top end of the shell, and the sampling cavity is a closed cavity. According to the multilayer testing sampling valve, switching-on and switching-off are only for a single layer and do not affect communication of a main runner.

The utility model discloses a method for the dynamic update of the address list of the stream control transport protocol, comprising the following steps: after a stream control transmission coupling is built, the end in which an IP address list changes is as a sender; the sender calls heart-beat detection primitive; the IP address list information needed to update is arranged in the parameter of the heart-beat detection primitive; the IP address list information comprises an updating address number, an updating mode and an IP address needed to update; the heart-beat detection information is built by the sender, and a flag field is arranged by the sender to indicate whether the receiver need to update the IP address list received from the sender; the change of the IP address is written in the information field of the heart-beat detection information by the sender, and the information field is sent to the receiver; the maintained IP address list needed to update is judged by the receiveraccording to the flag field of the heart-beat detection information, and the maintained IP address list is updated by the receiver according to the information field. In this way, the dynamic modification of the IP address list in both ends of the coupling is feasible without disconnecting the coupling.

The invention discloses a device packaging structure which has a large effective heat dissipation area and does not generate environmental pollution and consumes less materials. Besides, the invention also discloses a packaging method corresponding to the device packaging structure. According to the invention, the packaging structure comprises a package body, a wafer packaged in the package body, and a pair of leads connected with the wafer and extending out of the package body, the package body is of a cylindrical structure, the leads are led out from the two bottoms of the cylindrical structure respectively; the device packaging structure also comprises a metal shell respectively and correspondingly arranged at two ends of the package body, the connection area is large, the metal shell is electrically connected with the lead at the corresponding end, and is electrically insulated from the metal shell and the lead which are arranged at the opposite side. Based on the structure, the repair and welding of a pin is not necessary when in use, material consumption is small and additional pollution cannot be generated.

The invention discloses an oil smoke purifier purification efficiency detection device which comprises a supporting frame provided with a first oil chamber, a first oil gas conveying pipe communicated with the first oil chamber is arranged on the supporting frame located on the upstream of the first oil chamber, a first dust sensor is arranged on the first oil gas conveying pipe, and the first oil gas conveying pipe is further communicated with an oil sending and conveying assembly. The first oil chamber is communicated with an oil smoke purifier through a first connecting sleeve, a second oil chamber is arranged at the downstream of the oil smoke purifier, a second connecting sleeve is arranged between the oil smoke purifier and the second oil chamber, a second oil gas conveying pipe is arranged at the downstream of the second oil chamber, a second dust sensor is arranged on the second oil gas conveying pipe, and the other end of the second oil gas conveying pipe is communicated with an exhaust fan. The purification efficiency detection of a simulated field environment is realized, the oil mist conveying uniformity is high, the detection precision is guaranteed, the problems of high field arrangement difficulty and low detection precision of detection equipment are solved, and meanwhile, oil gas can be effectively prevented from adhering to the first oil gas conveying pipe and the second oil gas conveying pipe.

The invention provides a shoe with a heating function, and a power supply component. The shoe comprises a shoe body, a heating pad, a control switch and the power supply component, the heating pad is arranged at the sole position in the shoe body, the control switch is arranged on the outer surface of the shoe body, the heating pad is electrically connected with the power supply component and the control switch, and the control switch is used for controlling the heating pad to be opened or closed. The heating pad structure is arranged to heat the shoe sole part, so use is easy, and the use effect is good; and the power supply assembly combines wired, wireless and battery power supply technologies, so the use convenience is improved to the maximum extent.

This invention relates to a reform method for alkalinity of holes for porous vegetation concrete, which confects spraying solution, carries out filming by spraying and film solidification to form a densed macromolecular film layer on the surfaces of the holes, so that the filled soil in the holes is not basified and keeps neutral for a long time, which is suitable for the growing of vegetable roots and does not influence the strength of porous concrete.

The invention provides an air seal offset type bell valve which comprises a valve body, a valve plate and an inflation seal ring, wherein the valve body is provided with a feed opening and a discharge opening, a rotating shaft is penetrated in the valve body, a crank shaft rod is connected onto the rotating shaft, and a buckle ring is connected to a wall of the valve body outside the feed opening; the valve plate is connected onto the crank shaft rod, and a valve plate cover is arranged at the feed opening in a covering manner; and the inflation seal ring is provided with an inflation cavity, and the inflation seal ring is arranged on the buckle ring in a sleeving manner. According to the air seal offset type bell valve, the inflation seal ring can be contacted sufficiently with the valve plate after being inflated, so that a good sealing effect between the valve plate and the feed opening of the valve body is guaranteed.

The invention discloses a method for recovering wireless sensor network connectivity and mainly solves the problem that connectivity loss, caused by node faults, of a wireless sensor network influences the safety reliability of the network. The method is applicable to the dynamic-topological-relation wireless sensor network. The method has the advantages that a finite-state machine model is used to screen and communicate with a dominating set, the state of a node is updated in real time, and an optimal replacement node is selected according to node criticality and distance to replace an original faulted node so as to recover the network state; the method distinguishes node criticality, network energy consumption is reduced, the node state is updated in real time, and the method is adaptive to a dynamic network topology environment.