91results about How to "Reduced risk of air leaks" patented technology

The invention relates to a steam exhaust device, an electric pressure cooker and an exhaust control method. The steam exhaust device comprises an exhaust assembly which consists of an on-off mechanism and an exhaust column; the exhaust column is equipped with a first exhaust hole and a second exhaust hole, wherein the first exhaust hole is communicated with a high pressure cavity in a vessel, and while the second exhaust hole is communicated with the outside; the on-off mechanism is arranged at one side of the exhaust column and can switch the on and off states; when in the on state, the on-off mechanism can form a cavity with the exhaust column, and the first exhaust hole can be communicated with the second exhaust hole through the cavity so as to guide the high pressure cavity in the vessel to exhaust steam to the outside, and a first exhaust channel can also be formed; when in the off state, the communication mechanism can separate the first exhaust hole from the second exhaust hole, so as to stop the high pressure cavity in the vessel exhausting steam to the outside. With the adoption of the steam exhaust device and the exhaust control method, the exhaust-caused noise can be reduced, and the risk of steam leakage can be decreased.

The invention discloses a pipe fitting connecting structure and an installation method thereof, and relates to the technical field of pipe fitting connecting devices. The problems that an existing pipe fitting hoop structure and an installation method are complex in operation, and the engineering cost is increased are solved. The pipe fitting connecting structure comprises a hoop body, and the hoop body can wrap the outer walls of the pipe fittings and is in an annular shape. A pair of lugs capable of being tightly locked are fixed to the end of the hoop body, and therefore the hoop body can tightly wrap and be fixed to the pipe fittings. Two pipe fittings with turned edges at the ends are in butt connection. The hoop body is provided with a notch with the V-shaped cross section. The turned edges of the two pipe fittings are clamped into the notch. The installation method comprises the steps that 1, the edges of the ends of the pipe fittings are turned, and the two adjacent pipe fittings are in butt connection; and 2, the hoop body is arranged between the two adjacent pipe fittings in a sleeving manner, the sharp corner end of the V-shaped cross section of the hoop body is located between the turned edges of the two pipe fittings in butt connection, and the lugs of the hoop body are fastened.

The invention discloses a high-frequency electric surgical operating instrument. The high-frequency electric surgical operating instrument comprises a handheld component which comprises a trigger unit and is used for generating driving, a connection rod which extends from the handheld component to the far end, and a clamping device which is arranged at the far end of the connection rod and is used for clamping a tissue, wherein the connection rod comprises an outer sleeve, a pull rod and a tool push rod; the near end of the outer sleeve is connected with the far end of the handheld component; the far end of the outer sleeve is connected with the clamping device; the pull rod is arranged in the outer sleeve and is of a platy structure; the trigger unit drives the pull rod to move so as to further control the clamping device to be opened and closed; the tool push rod and the pull rod are arranged side by side; a cutter is arranged at the far end of the tool push rod. As the pull rod is of the platy structure which replaces the sleeve structure in the prior art, and the tool push rod and the pull rod are arranged in the outer sleeve side by side, the space in a gun tube is saved; the pull rod is of the platy structure which enhances the part intensity, so that the service lives of the parts such as the pull rod are prolonged, and the fault rate of the electric surgical operating instrument is reduced.

The invention relates to a pressure container. The pressure container comprises a barrel with a barrel opening, an upper cover covering the barrel opening of the barrel, and an inner container arranged in the barrel. A water inlet and outlet is formed in the upper cover, a connecting piece is arranged in the water inlet and outlet, an air cavity is formed between the barrel and the inner container, a water inflow and outflow connecting pipe is arranged on the inner container, the connecting piece is connected with the water inflow and outflow connecting pipe of the inner container, the water inflow and outflow connecting pipe is provided with a hollow pipe body and a connecting part protruding and stretching outwards from the pipe body, the connecting part is connected with an opening of the inner container so as to seal the opening of the inner container and provided with two opposite outer lateral sides away from the center line of the pipe body, the thickness of the connecting part is gradually reduced from the portion close to the center line of the pipe body to the outer lateral sides in the vertical direction of the pipe body, due to the fact that the thickness of the connecting part connected with the opening of the inner container so as to seal the opening of the inner container is gradually reduced from the portion close to the center line of the pipe body to the outer lateral sides, connection between the opening of the inner container and the connecting part is more stable, the sealing performance can be improved, and air leakage risks can be reduced.

The invention discloses a plug valve and a gas stove. The plug valve comprises a valve seat, a valve rod, a first gear, a second gear and a driving mechanism, wherein the valve rod is arranged on the valve seat; the first gear is arranged on the valve rod; the second gear is rotatably arranged on the valve seat and is meshed with the first gear; the driving mechanism comprises a motor and a steering device which is in driving connection with the motor; the motor and the steering device are arranged on the valve seat; the plug valve has a manual mode and an automatic mode; in the manual mode, the steering device and the second gear are independent from each other; and in the automatic mode, the steering device drives the second gear to rotate. According to the technical scheme, the situation that the gas stove cannot be normally used due to motor failure or power failure can be avoided.

The invention discloses a radio frequency SiP ceramic packaging shell and a manufacturing method thereof, the radio frequency SiP ceramic packaging shell comprises a multi-layer wiring ceramic substrate, a metal enclosure frame and a metal cover plate, the metal enclosure frame is welded on the surface of the multi-layer wiring ceramic substrate, and the metal cover plate and the metal enclosure frame are welded and fixed so as to cover the technical enclosure frame; the multilayer wiring ceramic substrate is provided with a two-stage stepped impedance matching transmission line structure witha ground coplanar waveguide-similar coaxial-strip line-similar coaxial- strip ground coplanar waveguide, the radio frequency signal transmission insertion loss can be obviously reduced while the airtightness of the packaging shell is ensured, and the light weight and miniaturization of the packaging shell are realized.

The invention discloses an integrated cast flange, which comprises a ring flange, an end cone and a sensor nut, wherein the bottom end of the end cone is provided with a transitional part; the transitional part and the end cone are of an integrated structure; the end cone is fixedly arranged on the ring flange through the transitional part; the inner side surface of the transitional part is flush with that of the end cone; the outer side surface of the transitional part is circular-arc-shaped; further, the upper end and the lower end of the outer side surface of the transitional part are connected with the end cone and the ring flange in a smooth butting manner respectively; the end cone is provided with a sensor mounting hole; the sensor nut is fixedly arranged in the sensor hole; and the ring flange, the end cone and the sensor nut are formed by adopting integrated casting. The invention also discloses a manufacturing process of the integrated cast flange. The flange is high in strength and good in firmness; the service life of a product is prolonged; the tightness during the connection with an engine is good; the product is stable, is high in precision, and is not liable to deform; air leakage risks are greatly decreased; the manufacturing process of the integrated cast flange is a few in working procedures and short in working hour; the cost is decreased; and resources are saved.

The invention discloses a once-formed soft bag connector, and belongs to the field of large infusion packages. The once-formed soft bag connector structurally comprises a rubber plug and a connector body with a medicine infusion channel. The rubber plug is arranged at the end of the connector body. The once-formed soft bag connector is characterized in that a sealing opening is formed in the end of the connector body, the inner diameter of the sealing opening is slightly larger than the diameter of the medicine infusion channel, a shoulder portion is formed at the joint of the sealing opening and the medicine infusion channel, a sealing pressing ring is arranged on an inner circle of the upper end of the sealing opening, and the rubber plug is arranged between the sealing pressing ring and the shoulder portion and abuts against the sealing opening in a pressed mode through the sealing pressing ring and the shoulder portion. Compared with the prior art, the once-formed soft bag connector has the advantages of being simple in technology, good in sealing performance and the like, and has the good application and popularization value.

The invention provides a gas inlet connecting pipe assembly and a natural gas engine comprising the same. The gas inlet connecting pipe assembly comprises a pipe body. A pipe joint, an elbow pipe anda straight pipe are arranged on the pipe body. One end of the pipe joint is connected with one end of the elbow pipe. The other end of the elbow pipe is connected with one end of the straight pipe. The straight pipe is further provided with a mixer and a throttle valve which communicate with the straight pipe. A natural gas inlet pipe is further arranged on the mixer. One end of the natural gas inlet pipe communicates with the mixer and is fixedly connected with the mixer. According to the gas inlet connecting pipe assembly and the natural gas engine comprising the same provided by the invention, a turbulent flow mixing function is directly integrated into a gas inlet connecting pipe, the function is achieved, the number of parts is decreased, the overall cost is saved, the mixing functionis more reliable in a casting or welding technological mode, and the gas leakage risk is lowered.

The invention relates to an aircraft fairing mold and a using method. The mold comprises a main mold body and a sub-mold body; a threaded sleeve and a lining sleeve are embedded into the mold partingsurface of the main mold body, and a lining sleeve is embedded into the mold parting surface of the sub-mold body; the sub-mold body is fixed to the main mold body through a pin and a bolt; and a vacuum bag is adhered to a sealing zone of the main mold body, the sub-mold body is wrapped in the vacuum bag, the mold parting surface is also wrapped in the vacuum bag, and therefore a sealing strip isnot needed. The main mold body is fixed to a supporting frame, the sub-mold body needs to be often dismounted and mounted, therefore, the sub-mold body and the main mold body are both made of a composite material, the mold weight is greatly decreased, and operation is convenient.

The invention discloses a rear-stage pump control system and control method for a vacuum system. The rear-stage pump control system comprises a vacuum chamber, a rear-stage pump, a front-stage pump, an electric control valve, a vacuum sensor and a control unit, wherein a gas pumping port of the rear-stage pump communicates with the vacuum chamber, and a gas exhausting port of the rear-stage pump communicates with a gas pumping port of the front-stage pump through the electric control valve; and a signal input interface of the control unit is connected with the vacuum sensor and a built-in temperature sensor of the rear-stage pump, and a control output interface of the control unit is connected with a front-stage pump controller, a rear-stage pump controller and an input interface of an electric control valve controller. According to the rear-stage pump control system and control method for the vacuum system, by arranging the control unit, the front-stage pump and the rear-stage pump can be controlled to be started/stopped in real time conveniently, the rotating speed of the rear-stage pump can be adjusted conveniently, the vacuum degree of the vacuum chamber and the working temperature of the rear-stage pump are measured in time, the pumping speed of the rear-stage pump can be adjusted conveniently, the service life of the rear-stage pump is guaranteed, the working stability ofthe rear-stage pump is guaranteed, and power consumption is reduced; and the whole vacuum system has the advantages of being small in size and high in pumping speed, integration of the whole vacuum system is facilitated, and compared with a front-stage pump peripheral mode, the gas circuit structure is simplified.

The invention discloses a sliding type electric joint structure through which a first conductive component is connected with a second conductive component. A sliding conductor is also included, the sliding conductor is fixedly connected with the first conductive component, and provided with a hole, the second conductive component penetrates the hole, and the inner wall of the hole cooperates with the second conductive component; and in an installation state, the second conductive component is inserted into the hole so that the second conductive component is in sliding-type electrical connection with the sliding conductor. The invention also discloses a manufacturing and assembling method of the sliding type electric joint structure. The sliding type electric joint structure enables that a penetrating cable as the second conductive component slides freely in the axial direction, the cable has less local limitation on a thin wall of a vacuum chamber along the radial direction (the same with the axial direction of the cable) of the vacuum chamber, the possibility that local bearing of the thin wall of the vacuum chamber is not uniform is reduced, the risk of leakage caused by too large stress of a welding line is reduced, and the stress of the cable and a penetrated portion of the vacuum chamber is reduced.

The invention discloses a novel steam turbine. The integral novel steam turbine is fixed onto a table. A spindle is arranged on the table via a left bearing block and a right bearing block which are arranged on support frames, a cylinder is arranged on the table, the spindle penetrates the cylinder to be arranged on the left bearing block and the right bearing block, steam generated by a boiler is delivered to the cylinder via a steam pipeline, a plurality of rotors are connected onto the spindle by couplings, moving blades are arranged on the rotors, a salt spray filter is arranged at a steam inlet of the cylinder, a partition plate sleeve is fixed onto the inner wall of the cylinder, a plurality of partition plates are fixed onto the partition plate sleeve, the steam flows into later-stage components after flowing through the partition plates, heat energy of the steam is converted into mechanical energy by the multiple groups of moving blades, and an output end of the spindle is connected with a power generator. The novel steam turbine has the advantages that the novel steam turbine is novel in structure, the content of salt in the steam is reduced, internal devices of the steam turbine are protected, leakage damage to the cylinder due to expansion caused by heat and contraction caused by cold is prevented, power of the steam is increased, and the power generation efficiency is improved.

The invention discloses a flexible supporting structure which is used for supporting connection of an outer cylinder body and an inner flow passage of an exhaust cylinder of a gas turbine. The flexible supporting structure comprises a mounting plate, an adjusting bolt, a sealing gasket and an adjustable support cylinder, wherein the mounting plate is mounted on the outer cylinder body, the adjustable support cylinder is mounted on the inner flow passage, the sealing gasket is arranged between the mounting plate and the adjustable support cylinder, and the adjusting bolt penetrates through themounting plate and the sealing gasket to be connected with the adjustable support cylinder; the adjustable support cylinder comprises a shell, a spring and a connecting plate, wherein the spring and the connecting plate are arranged inside the shell, the lower end of the spring is fixedly connected with the shell, the upper end of the spring is fixedly connected with the connecting plate, the shell is fixed on the inner flow passage, the connecting plate is provided with a threaded hole, and the adjusting bolt is connected with the connecting plate through the threaded hole and used for adjusting the tension of the spring. By adopting the flexible supporting structure, the thermal deformation stress of the inner flow passage can be ensured to be small, machining and mounting are convenient, and the outer cylinder body can be ensured not to be separated so as to reduce the air leakage risk.

The invention discloses a molecular sieve gas circuit control device. The molecular sieve gas circuit control device comprises an end cover, a gas circuit body and a control valve assembly, and the end cover is provided with an air inlet joint which is connected with a high-pressure air source, the end cover is connected with the gas circuit body in a sealing manner, the control valve assembly isarranged in the gas circuit body, a gas inlet cavity and a gas exhaust cavity are formed in the gas circuit body, the gas inlet cavity communicates with the gas inlet connector and the molecular sievetower, the gas exhaust cavity communicates with the gas exhaust hole and the molecular sieve tower, and the control valve assembly controls opening and closing of the gas inlet cavity and the gas exhaust cavity. The invention discloses a molecular sieve gas circuit control device. Two silencing cavities are formed through the air inlet cavity and the air outlet cavity of the end cover and the airchannel body, instability of airflow is eliminated, air inlet noise and air outlet noise are effectively eliminated, all components are integrated through the air channel body, external connectors are not needed, the number of the connectors is effectively reduced, the air leakage risk is reduced, and maintenance is easy. Meanwhile, the gas circuit structure is good in packaging performance and compact in structure.

The invention discloses an underground coal producing hole rail moving type air quantity regulating device, which comprises a moving rail, an air baffle plate and a pull rod regulating device, wherein the moving rail consists of two identical iron rails; the iron rails are respectively and fixedly arranged at the two sides of a coal producing hole and are mutually parallel; the air baffle plate is arranged between the two iron rails of the moving rail and is attached to the end surface of the coal producing hole; the two sides of the air baffle plate are connected with the moving rail in a slide moving way; the pull rod regulating device comprises a telescopic pull rod and an oil cylinder driving the telescopic pull rod; the output end of the telescopic pull rod is connected with the tail part of the air baffle plate; the air baffle plate is pushed to do reciprocating movement relative to the end surface of the coal producing hole on the moving rail. The underground coal producing hole rail moving type air quantity regulating device has the advantages that through the slide moving air baffle plate, a hole passage of the coal producing hole is covered and plugged; the air leakage risk is effectively reduced; the safety coefficient is improved. The structure is simple; the capital investment is low; the labor and material cost is greatly reduced.

The invention discloses a connecting device used for wound protecting dressing and the wound protecting dressing. The connecting device comprises a first pipe joint and a second pipe joint, the firstpipe joint and the second pipe joint are internally provided with a first through hole and a second through hole running through respective two ends of the first pipe joint and the second pipe joint respectively; a hollow ball is integrally formed at one end of the first pipe joint, the inner chamber of the ball is communicated with the first through hole, and at least one via hole is formed in the ball; a ball shell adapted to the ball is integrally formed at one end of the second pipe joint, the inner chamber of the ball shell is communicated with the second through hole, a locking connecting hole is formed in the ball shell, the locking connecting hole has at least one round locking hole, the ball is locked in the ball shell, and the end, close to the ball, of the first pipe joint is locked in one of locking holes of the locking connecting hole. The invention provides the connecting device used for wound protecting dressing and the wound protecting dressing, which can avoid compression to the skin and the wound surface, is beneficial for smooth outflow of liquid, and is beneficial to flexible connection of pipelines.