30results about How to "Realize one-way circulation" patented technology

The invention provides a bi-directional flow-limiting valve. The bi-directional flow-limiting valve comprises a valve body and a valve core. A body cavity of the valve body is arranged to be two fluid cavities communicated with each other. An inner end opening of one of fluid cavities is plugged by one end of the valve core. First springs are connected between the other end of the valve core and the inner wall of the valve body and used for providing the valve core with force for plugging the fluid cavities. A through hole is formed in the valve core along a radial direction of the valve core. A drain plug is plugged in a hole opening of the through hole, which is plugged by the valve core, of the end wall of one fluid cavity. A second spring is connected between the drain plug and the valve core and used for providing the drain plug with force for plugging the hole opening of the through hole. By cooperation between the valve body and the valve core and cooperation between the through hole and the drain plug, unidirectional circulation of fluids is achieved without backflow. Due to the fact that the cavity diameter of each fluid cavity is larger than hole diameter of the through hole, different fluid cavities are selected as fluid inlets such that different flow rate and flow quantity of fluids can be realized. Sealing rings help to ensure sealing performance of the bi-directional flow-limiting valve such that the back flow-resistant effect is better achieved.

The invention discloses a dust-free environment-friendly board eraser which comprises a cleaning module, an atomizing and dust removing module and a dust collecting module. The atomizing and dust removing module comprises a base board, a first annular body, a second annular body, a third annular body and a flaky ring, wherein an annular groove is defined by the lower surface of the base board, the inner wall face of the second annular body, the outer wall face of the third annular body and the upper surface of the flaky ring, and a round pipeline is arranged on the inner wall face of the first annular body and provided with at least one atomizing nozzle. The atomizing and dust removing module further comprises a suction fan and a fan support used for fixing the suction fan. The annular groove is divided into a first region and a second region through two sealing partition plates, wherein the first region is used for storing water, the second region is used for installation of a battery module, a water pump is installed in the first region, the water pump and the suction fan are electrically connected with the battery module, and the water pump is connected with the round pipeline through a water spraying pipe so as to supply water in the first region to the atomizing nozzles. Therefore, mist is sprayed into the first annular body to form an atomizing channel.

The invention relates to the technical field of urban parking charging, in particular to an ETC, Internet of Things and block chain-based urban parking management method, which comprises the following steps of: dividing an urban into a plurality of square district units, wherein urban main roads are arranged between the district units; setting each district unit as a virtual parking lot, arranging a plurality of entrances and exits in the virtual parking lot, wherein each entrance and exit is provided with a virtual parking lot ETC identification and payment device which is used for carrying out vehicle identification and charging management on parking behaviors in a virtual parking lot. arranging road ETC recognition and payment devices in all directions of the crossing of the urban main road, wherein theroad ETC recognition and payment devices are used for carrying out vehicle recognition and charging management on parking behaviors of roadsides. The virtual parking lot ETC identification and payment device and the road ETC identification and payment device are wirelessly connected to a urban parking management platform through the Internet of Things. According to the invention, district barrier gates are abandoned, traffic is effectively dispersed, parking spaces are increased, parking resources are optimized, integrated and utilized, and the utilization rate of the parking lot is improved.

The invention discloses a silicon carbide single crystal growth device capable of balancing the atmosphere of a growth system, which comprises a graphite crucible used for containing silicon carbide powder and heating the silicon carbide to sublimate and decompose the silicon carbide powder into a gas phase component; a seed crystal support used for containing seed crystals capable of growing silicon carbide single crystals; a gas pipe which comprises an outer gas pipe and an inner gas pipe and used for capturing and absorbing sublimated and raised gas-phase components and slowly releasing the sublimated and raised gas-phase components into the silicon carbide powder from the bottom of the gas pipe; and a halogen gas pipe used for consuming more silicon components in the initial stage of crystal growth,wherein the halogen gas pipe and the halogen gas pipe are matched together to realize dynamic balance of gas-phase silicon and carbon components in the sublimation process in the growth process of the silicon carbide single crystal, so that the ratio of carbon to silicon in a crystal growth area is kept in an optimal range, and the growth quality of the silicon carbide single crystal is improved.

The invention discloses a device for storing traditional Chinese medicinal materials, belonging to the technical field of traditional Chinese medicinal material storage. Moisture-absorbing balls are arranged in a plurality of separately opened storage cavities, and the moisture-absorbing balls are composed of spherical moisture-absorbing cotton and inner magnetic water-absorbing bags , when the moisture in the storage chamber is too heavy, the spherical moisture-absorbing cotton and the inner magnetic water-absorbing bag located inside the storage chamber absorb moisture and reduce the moisture in the storage chamber. When the inner magnetic water-absorbing bag absorbs water and expands, it will make the elastic insulation The magnetic layer expands. At this time, the one-way exhaust pipe acts as a magnetic attraction for the inner magnetic water-absorbing bag. Under the action of magnetic attraction, the inner magnetic water-absorbing bag drives the air supply actuating body to fit together, thereby triggering the touch switch at the air supply nozzle. Therefore, the gas in the air storage box is introduced into the sub-drying chamber through the air supply pipe and the air supply nozzle to dry the spherical moisture-absorbing cotton and the inner magnetic water-absorbing bag after moisture absorption. After drying and dehydration, the moisture-absorbing ball is reset and the air intake is disconnected. The source is circulated in this way to achieve intelligent moisture absorption and drying of storage chambers in multiple different environments.

The invention provides a blood return prevention infusion connector which comprises an outer connector, an inner connecting seat and an elastic barrier piece. The outer connector is hermetically connected with the inner connecting seat, the elastic barrier piece is arranged between a liquid inlet of outer connector and a liquid outlet of the inner connecting seat, the periphery of the elastic barrier piece is connected with the inner wall of the liquid inlet, the elastic barrier piece is provided with a closed portion and a liquid though port, and the closed portion covers a liquid outlet of the inner connecting seat. By the aid of the blood return prevention infusion connector, the elastic barrier piece is fixed for the first time, one-way flow of liquid medicine is realized by only depending on deformation of the elastic barrier piece, the blood return can be prevented by the infusion connector even if liquid pressure is equal to human venous pressure or the pressure difference between the liquid pressure and the human venous pressure are smaller, the connector effectively solves the problem that a blood return prevention infusion connector cannot really function in preventing blood return in prior art, so that blood return is avoided even if an infusion person optionally walks or lifts an arm in the infusion process, and clinical application is more facilitated.

The invention discloses a silicon carbide single crystal growth device capable of balancing the atmosphere of a growth system, which includes a graphite crucible for holding silicon carbide powder and heating the silicon carbide to make the The silicon carbide powder is sublimated and decomposed into gas phase components; the seed crystal holder is used to hold the seed crystal capable of growing silicon carbide single crystal; the air pipe, including the outer air pipe and the inner air pipe, is used to capture and absorb the sublimated gas phase components, from The bottom of the trachea is slowly released into the silicon carbide powder; the halogen gas trachea is used to consume more silicon components in the initial stage of crystal growth, and the two work together to realize the gas phase silicon and carbon components in the sublimation process during the growth of silicon carbide single crystals. Medium dynamic balance, keep the ratio of carbon and silicon in the crystal growth area in the optimal range, and improve the quality of silicon carbide single crystal growth.

The invention discloses a one-way vent valve comprising a valve body. An intake passages and an exhaust passage which are independent are arranged in the valve body. Two elastic spools having opposite directions and same structure are disposed in the intake passage and the exhaust passage respectively. One end of each spool is in a hollow structure having an air inlet, and the outer walls of the other ends of the spools are provided with two opposing wedged faces. An exhaust slit is reserved at an intersection of the two edged faces. The sidewalls of the spools are hermetically fixed to the inner walls of the intake and exhaust passages. The invention further discloses a breathable shoe with the one-way vent valve. The one-way vent valve is simple in structure and unique in design; through the exhaust slit in special structure and the independent intake and exhaust passages, unidirectional air flowing is achieved, inside and outside air mixing is prevented, and continuous supply of fresh air is guaranteed.

The invention discloses a viscous damper and a bridge with viscous dampers, and relates to the field of bridge design. The viscous damper comprises a body, a piston rod and a piston. A cavity is formed in the body and filled with a damping medium, one end of the piston rod stretches into the cavity, the piston is arranged at the end, stretching into the cavity, of the piston rod and divides the cavity into a first chamber and a second chamber, and at least one channel is formed between the first chamber and the second chamber; at least one one-way channel is further formed between the first chamber and the second chamber, and the one-way channels are opened when the viscous damper bears tension and are closed when the viscous damper bears pressure. According to the viscous damper, one-way circulation of the first chamber and the second chamber can be achieved, one-way acting force is generated on an object, and then bridge abutments only bear thrust of a girder and do not bear tension, so that the stress state of the bridge abutments is greatly improved, damage to the bridge abutments is not likely to be caused, the stability of the bridge structure is improved, and the maintenance cost is reduced.

The invention relates to a water storage tank, which comprises a water storage tank body and a seepage drainage layer. The water storage tank body includes a pool bottom and a pool side wall, and a seepage drainage layer is arranged around the pool bottom and the pool side wall. The horizontal seepage collection pipe and the vertical seepage collection pipe connected in a criss-cross pattern are arranged in the described seepage drainage layer, and the side walls of the horizontal seepage collection pipe and the vertical seepage collection pipe are provided with seepage holes; The seepage pipe communicates with the seepage discharge pipe, and the seepage discharge pipe passes through the side wall of the pool and communicates with the one-way valve in the reservoir body. The invention also includes a design calculation method for the water storage tank. In the present invention, horizontal seepage collection pipes and vertical seepage collection pipes connected in a criss-cross pattern are arranged in the seepage drainage layer to realize the automatic collection of water in the seepage drainage layer into the reservoir, thereby reducing the impact of the seepage drainage layer on the superstructure. The buoyancy of the material ensures the safety of the building; by setting the one-way valve, the groundwater in the seepage layer can only flow in one direction, so as to avoid the pollution of the groundwater.

The present application relates to an anti-return air intake structure for a rotary detonation combustion chamber, which includes a Tesla valve communicated with the rotary detonation combustion chamber and disposed at the inlet of the rotary detonation combustion chamber, the Tesla valve comprising a housing and a flow channel, the casing is coaxially connected to the outer wall of the rotary detonation combustion chamber, the flow channel is arranged in the casing, the inlet end of the flow channel is used for introducing air, and the outlet end of the flow channel is connected to the The annular channel of the rotary detonation combustion chamber communicates with each other. The present application utilizes the one-way flow characteristic of the Tesla valve to separate the forward passage of air and fuel into the rotary detonation combustion chamber and the reverse passage of pressure return, effectively reducing the pressure return to the forward entry. The obstacle of the air and fuel, so that the knocking boost can make up for the total pressure loss caused by the upper intake air, thereby improving the total pressure gain of the rotary knocking combustion chamber.

The invention discloses a dust-free environment-friendly board eraser which comprises a cleaning module, an atomizing and dust removing module and a dust collecting module. The atomizing and dust removing module comprises a base board, a first annular body, a second annular body, a third annular body and a flaky ring, wherein an annular groove is defined by the lower surface of the base board, the inner wall face of the second annular body, the outer wall face of the third annular body and the upper surface of the flaky ring, and a round pipeline is arranged on the inner wall face of the first annular body and provided with at least one atomizing nozzle. The atomizing and dust removing module further comprises a suction fan and a fan support used for fixing the suction fan. The annular groove is divided into a first region and a second region through two sealing partition plates, wherein the first region is used for storing water, the second region is used for installation of a battery module, a water pump is installed in the first region, the water pump and the suction fan are electrically connected with the battery module, and the water pump is connected with the round pipeline through a water spraying pipe so as to supply water in the first region to the atomizing nozzles. Therefore, mist is sprayed into the first annular body to form an atomizing channel.

The invention discloses a self-heating type vibrating rod for concrete drumming, which belongs to the field of concrete vibration technology. By circularly distributing a plurality of groups of vibrating balls on the outer wall of a hollow rod body, the lifting rod moves up and down, and the bar-shaped teeth With synchronous lifting movement, the vibrating ball installed with multiple heat conduction rods is driven by the arc-shaped toothed belt to turn up and down on the outside of the hollow rod body, which effectively vibrates the concrete. The gas ring-shaped exhaust part effectively discharges the gas in the concrete into the hollow rod during the vibration of the concrete. On the one hand, it effectively reduces the gas in the concrete and reduces the amount of air bubbles in the concrete. On the other hand, the air introduced and the vibration The self-heating layer filled inside the ball reacts to provide a reaction medium for the self-heating layer, so that the self-heating layer generates heat to provide heat for the vibrating ball, and evenly distributes the heat to the concrete, effectively realizing a more comprehensive heating and heat preservation treatment for the concrete.

The invention discloses a swing check valve, and belongs to the technical field of design of water valves. The swing check valve comprises a valve body, a valve clack, a connecting rod, a bolt, a nut, a cotter pin, a cylindrical pin, a cover plate, stand columns and a fixing pin. The connecting rod is connected into a pipeline of the valve body. The valve clack and the connecting rod are connected through the bolt. The right end of the bolt is screwed into the nut. The cotter pin is arranged on the portion, located at the right end of the nut, of the bolt so that the situation that the nut falls from the right end of the bolt after getting loose can be effectively prevented. The connecting rod and the valve clack are connected reliably, the top of the valve body is covered with the cover plate, and the valve body and the cover plate are fixedly connected through the bolt. According to the swing check valve disclosed by the invention, unidirectional circulation of water flow can be achieved conveniently, the connecting rod and the valve clack can flexibly rotate relative to the valve body, the connecting rod and the valve body are connected reliably, and the structure is simple; and the two stand columns are arranged on the portion, located on the right side of the fixing pin, of the bottom surface of the cover plate, so that the situation that the valve clack and the connecting rod collide with the valve body under the impact of the water flow is prevented, and the service life is prolonged.