35results about How to "Control infusion speed" patented technology

The invention discloses a disposable automatic heating and pressurizing transfusion device comprising a closed vessel containing sterile liquid. The disposable automatic heating and pressurizing transfusion device is characterized in that the closed vessel is internally provided with a piston which divides the closed vessel into an upper part and a lower part, wherein the capacity of the upper part is larger than that of the lower part, the upper part is a liquid bin in which the sterile liquid is closed in advance, and a vacuum chamber at the lower part is internally provided with a pressurizing device which is connected with the center of the bottom surface of the piston; a medicine adding device is arranged at one side of the top of the liquid bin, and a transfusion rubber tube is led out from the other side of the top of the liquid bin and is connected with a venipuncture needle head; and a heating device is arranged at the periphery of the radial bin wall of the liquid bin. The invention can control the transfusion quantities and the transfusion speed and automatically heat under the cold condition, has simple and convenient administration operation, flexible administration, no secondary pollution, small volume, light weight, convenient carrying, and is particularly suitable for relieving a sick or injured person in field operation and doing rescue and relief work in the field under the cold condition, thereby realizing transfusion in a narrow space.

The invention discloses a negative pressure drainage system capable of achieving a self-circulation; the negative pressure drainage system can generate a continuous liquid shearing force in the position of a wound surface, so as to accelerate the union of the wound surface. The negative pressure drainage system comprises a medical dressing, a waste liquid bottle, a vacuum pump, an A liquid conduit, an A air conduit, a B liquid conduit, a peristaltic pump, a C liquid conduit, an infusion bottle, an E liquid conduit, an a control valve, a B control valve and an F control valve, wherein the medical dressing, the B liquid conduit, the peristaltic pump, the C liquid conduit and the infusion bottle are sequentially connected. The medical dressing, the A fluid conduit, the waste liquid bottle, the A air conduit and the vacuum pump are sequentially connected. The E liquid conduit is connected between the C liquid conduit and the A liquid conduit. The A control valve is installed on the A liquid conduit; and the connection point between the E liquid conduit and the A liquid conduit is located between the A control valve and the medical dressing. The B control valve is installed on the C liquid conduit; and the connection point between the E liquid conduit and the C liquid conduit is located between the B control valve and the peristaltic pump. The F control valve is installed on the E liquid conduit.

The invention relates to a piezoelectric sheet driven drug injector, and belongs to the field of medical instruments. The top of a main body is provided with a syringe with a secondary piston and a cylinder chamber, and a main piston divides the cylinder chamber into left and right cylinder chambers; a main piston push rod protrudes through the left wall of the cylinder chamber and abuts against asecondary piston push rod; the bottom of the man body is provided with an upper air inlet hole, a boss and a plurality of round table groups; the top of a box body is provided with a lower air inlethole, a hole chamber, a gas storage chamber communicated with a lower outlet chamber and body chamber groups and body chambers respectively equal to the number of the round table groups and the numberof round tables included therein; the main body is mounted on the box body, and the boss is placed in the hole chamber and makes upper and lower outlet chambers be communicated with the gas storage chamber; the round tables press drivers in the body chambers through sealing rings to form upper and lower compression chambers, the upper and lower compression chambers in the same body chamber groupsare respectively connected in parallel to form upper and lower compression chamber groups, and each upper compression chamber group and each lower compression chamber group are respectively connectedin series to form upper and lower compression units; the left cylinder chamber is connected to a reversing valve through a gas transmission pipe, and the right cylinder chamber is connected to the gas storage chamber through the gas transmission pipe and the reversing valve.

The invention relates to a spraying machine, in particular to a convenient spraying machine for a garden. In order to solve the technical problem, the invention provides the convenient spraying machine being low in cost and convenient to move for the garden. The convenient spraying machine for the garden comprises a first mounting plate, a first connecting rod, a driving mechanism, a linking mechanism, a liquid transmitting mechanism, a shaking mechanism, a spraying mechanism, a second mounting plate, a feeding hopper, a third mounting board, an L-shaped rod, a shaking box, a conveying belt, universal wheels and a fourth mounting plate, wherein the universal wheels are fixedly connected to the bottom of the fourth mounting plate; the first mounting plate, the second mounting plate and the third mounting plate are sequentially and fixedly connected to the top of the fourth mounting plate along the length direction of the fourth mounting plate. The convenient spraying machine disclosed by the invention has the effects that fruit trees in the garden can be conveniently sprayed within a narrow range, and thereby the effects of convenience in movement and increase of spraying speed are realized.

The invention relates to a portable transfusion device and belongs to the field of medical instruments. A main body is arranged on a base, a left boss with an inlet hole, a right boss with an outlet cavity and an upper outlet hole and at least two body tables which are sequentially reduced in diameters from left to right are arranged on the main body, an upper inlet cavity and the upper outlet hole are arranged on the body tables, an air bag and a medicine bag are arranged in a bag cavity of the main body, a flow valve and a needle are arranged on a medicine bag transfusion tube, the air bag is communicated with the upper outlet hole through an air conveying pipe, a deflation valve is arranged on the air conveying pipe; a left cavity with a lower inlet hole, a right cavity with a lower outlet hole and a body cavity are arranged on the base, the body cavity is provided a lower inlet cavity and a lower air outlet hole; the upper and lower inlet and outlet cavities and valve sheet thereinform upper and lower inlet and outlet valves; the left boss is arranged in the left cavity, the right boss is arranged in the right cavity, the body tables press a driver in the body cavity, the driver consists of two piezoelectric vibrators and a washer arranged between the vibrators; the driver, a seal ring, the main body and the base respectively constitute upper and lower compression cavitieswhich are connected in parallel after being connected in series.

The invention relates to a portable drug injector, and belongs to the field of medical instruments. The top of a main body is provided with a syringe, the main body is provided with a cylinder chamber, a main piston divides the cylinder chamber into left and right chambers, a push rod of the main piston stretches out from the left wall of the cylinder chamber and abuts against a push rod of an auxiliary piston; the main body is arranged on a box body, left and right bosses of the main body are placed in left and right sinking cavities of the box body respectively, flow inlet and outlet holes in the main body are communicated with flow inlet and outlet holes in the box body respectively; body tables of the main body press drivers in body cavities of the box body through sealing rings to form upper and lower compression cavities, the diameters of the upper and lower compression cavities are gradually decreased from left to right, and the upper and lower compression cavities are firstly connected in parallel and then connected in series; each energy converter is composed of two piezoelectric vibrators and a gasket between the corresponding piezoelectric vibrators, and each piezoelectric vibrator is formed by bonding a base plate and a piezoelectric plate; when the portable drug injector is in use, the deformation directions of the two piezoelectric vibrators of the same energy converter are same, and the deformation directions of piezoelectric vibrators in every two adjacent drivers on the left and right are opposite; left and right cavities are connected with a reversing valve through air conveying pipes, and the reversing valve is connected with an air storage chamber through an air conveying pipe.

The invention relates to a portable infusion device and belongs to the field of medical instruments. The base is provided with an inlet hole, at least two sinking cavity groups formed by sinking cavities, outlet cavities and an air storage chamber, wherein the number of the sinking cavities contained in each sinking cavity group from left to right is reduced in sequence; inlet cavities and vent holes are formed in the leftmost sinking cavity in each sinking cavity group, and other sinking cavities are provided with air inlet holes and air outlet holes; the inlet and outlet cavities and valve plates mounted in the inlet and outlet cavities form inlet and outlet valves respectively; a main body is mounted on the base and presses a diaphragm on the base, guide holes of the main body and the sinking cavities of the base are symmetrically formed in the two sides of the diaphragm, and piezoelectric stacks in the guide holes press T-shaped pistons on the diaphragm; the diaphragm presses sealing rings into the sinking cavities to form compression cavities; the corresponding compression cavities in each sinking cavity group are connected in parallel to form a compression cavity group, and all the compression cavity groups are connected in series. The top of the main body is provided with a bag cavity provided with an airbag and a medicine bag, a liquid outlet pipe of the medicine bag isprovided with a flow regulating valve and a needle head, and an air inlet pipe of the airbag is connected with the air storage chamber and provided with a switch valve and a deflation valve.

The invention relates to a step-by-step pressurizing pneumatic infusion device, and belongs to the field of medical instruments. A main body is provided with an upperinlet hole, a boss with an upper outlet cavity and an outlet holeand at least two round table groups of which the number of round tables contained sequentially changes; an upper inlet cavity and an upper air outlet hole are formed inone round table of the round table groups, and upper vent holes are formed in the other round tables; a capsule of the main body is internally provided with an infusion bag with an air cavity and a drug cavity, and the air cavity is connected with the outlet hole; a base is provided with a lower inlet hole, a hole cavity with a lower outlet cavity and a body cavity group formed by body cavities;alower inlet cavity and a lower air outlet hole are formed in one body cavity of the body cavity group, and lower vent holes are formed in the other body cavities; the upper and lower inlet and outletcavities and valve plates therein constitute upper and lower inlet and outlet valves; the main body is mounted on the base and makes the upper and lower outlet cavities and the outlet hole be communicated with each other, theround tables press piezoelectric actuators into the body cavities through sealing rings to form upper and lower compression cavities, the upper and lower compression cavitiesin the same body cavity group are respectively connected in parallel to form upper and lower compression cavity groups, and the upper and lower compression cavity groups are respectively connected inseries to form upper and lower compression units which are connected in parallel.

The invention relates to a piezoelectric stack-driven transfusion device, which belongs to the field of medical equipment. The top of the base is provided with an inlet hole, a cavity communicating with the outlet hole through the outlet cavity, and at least two body cavity groups composed of body cavities; only one body cavity in each body cavity group is provided with an inlet cavity and an air outlet hole, and the other body cavities are only provided with Ventilation hole; the main body crimps the diaphragm on the base, and the bottom of the main body is provided with guide hole groups and guide holes equal to the body cavity group and the number of body cavities contained therein. The guide holes are equal in diameter to the body cavity and symmetrically arranged on both sides of the diaphragm. It forms a compression chamber with the body cavity and the inlet valve; the compression chambers in the same body cavity group are connected in parallel to form a compression chamber group, and each compression chamber group is connected in series; the piezoelectric stack in the guide hole presses the piston on the diaphragm; the cavity on the top of the main body is equipped with A medicine bag composed of a medicine chamber and an air chamber; the air chamber communicates with the outlet hole through the air delivery pipe, and a flow valve and a needle are installed on the infusion pipe of the medicine chamber; The diaphragm deforms in the opposite direction.

The invention relates to a portable transfusion device, which belongs to the field of medical instruments. The base is provided with an inlet hole, at least two sink cavity groups composed of sink chambers, an outlet cavity and an air storage chamber, and the number of sink chambers contained in each sink cavity group decreases in turn from left to right; There are inlet and outlet holes on the sink cavity on the side, and inlet and outlet holes on the other sink cavity; the inlet and outlet cavity and the valve plates installed in it constitute the inlet and outlet valves respectively; the main body is installed on the base and the diaphragm is crimped on the base The guide hole of the main body and the sink cavity of the base are symmetrically arranged on both sides of the diaphragm, and the piezoelectric stack in the guide hole crimps the T-shaped piston on the diaphragm; the diaphragm crimps the sealing ring in the sink cavity to form a compression chamber; the same The compression chambers in the sink chamber group are connected in parallel to form a compression chamber group, and each compression chamber group is connected in series; the top of the main body is provided with a chamber with an air bag and a medicine bag, and a flow regulating valve and a needle are arranged on the liquid outlet pipe of the medicine bag, and the air bag inlet pipe It is connected with the air storage chamber, and an on-off valve and an air release valve are arranged on the intake pipe of the air bag.

The invention relates to a piezoelectric stack-driven medicinal liquid injection device, which belongs to the field of medical instruments. A syringe is installed on the main body, and a cylinder chamber and a guide hole are provided. The cylinder chamber piston divides the cylinder chamber into left and right chambers. From right to left, the number of sink chambers, outlet chambers, and gas storage chambers are increasing; the leftmost sink cavity in each sink cavity group is equipped with inlet and outlet holes, and other sink chambers are equipped with inlet and outlet holes. The valve plate is installed in the inlet and outlet chambers; the main body is installed on the base and a diaphragm is pressed between them, the piezoelectric stack in the guide hole crimps the top block on the diaphragm, and the diaphragm crimps the sealing ring in the sink chamber to form a compression chamber; The compression chambers in the same sink chamber group are connected in parallel to form a compression chamber group, and each compression chamber group is connected in series; the left and right chambers are connected to the gas storage chamber through an air pipe and a reversing valve; during work, the deformation direction of the diaphragm in the same compression chamber group is the same. The deformation directions of the diaphragms in adjacent compression cavity groups are opposite.

The invention relates to a transfusion device driven by a piezoelectric stack, which belongs to the field of medical equipment. The base is provided with an entrance and exit hole, an exit cavity and at least two sinking cavities with different diameters. The diameters of the sinking cavity decrease successively from left to right. The installed valves constitute the inlet and outlet valves; the bottom of the main body is provided with guide holes equal in number and diameter to the sink cavity, the main body is installed on the base and the diaphragm is crimped on the base, and the guide holes and the sink cavity are symmetrically arranged on both sides of the diaphragm ; The piezoelectric stack in the guide hole crimps the piston on the diaphragm; the diaphragm crimps the sealing ring in the sink cavity to form a series of compression chambers; The end of the side wall is equipped with a baffle; the liquid outlet pipe of the medicine bag is provided with a flow regulating valve and a needle; In , the deformation directions of the diaphragms in two adjacent compression chambers are opposite.

The invention relates to a portable drug injector, which belongs to the field of medical equipment. The top of the main body is equipped with a syringe and a cylinder chamber. The main piston divides the cylinder chamber into left and right chambers. The push rod of the main piston protrudes through the left wall of the cylinder chamber and leans against the push rod of the auxiliary piston; the main body is installed on the box. The left and right bosses of the main body are respectively placed in the left and right sinking cavities of the box, and the upper inlet and outlet holes of the main body are respectively connected with the upper inlet and outlet holes of the box; the body platform of the main body crimps the driver to the body cavity of the box through a sealing ring The upper and lower compression chambers are formed inside and the diameter of the upper and lower compression chambers gradually decreases from left to right. The upper and lower compression chambers are connected in series and then in parallel; the transducer is composed of two piezoelectric vibrators and a gasket in the middle, and the piezoelectric vibrator is composed of a It is bonded with the piezoelectric sheet; during work, the deformation directions of the two piezoelectric vibrators in the same transducer are the same, and the deformation directions of the piezoelectric vibrators in the left and right adjacent drivers are opposite; The valve is connected, and the reversing valve is connected with the gas storage chamber through the gas delivery pipe.

The invention relates to a drug delivery device driven by gas stepwise compression, which belongs to the field of medical equipment. The main body is equipped with a syringe and a cylinder chamber. The main piston in the cylinder chamber divides the cylinder chamber into left and right chambers. The main piston push rod protrudes through the left wall of the cylinder chamber and leans against the push rod of the auxiliary piston of the syringe; the main body is installed in the On the base, the small boss of the main body is placed in the cavity of the box body. The boss of the main body is crimped in the body cavity of the base through the sealing ring. The driver is composed of two piezoelectric vibrators and ring gaskets. The piezoelectric vibrator consists of The substrate and the piezoelectric sheet are bonded together; the driver and the sealing ring form the upper and lower compression chambers with the main body and the base respectively. unit, the upper and lower compression units are connected in parallel; the left and right chambers are connected to the gas storage chamber through the air pipe and reversing valve; during operation, the deformation direction of the piezoelectric vibrator in the same body cavity group is the same, and the deformation direction of the piezoelectric vibrator in two adjacent body cavity groups is opposite .

The invention relates to a pneumatic infusion device, and belongs to the field of medical instruments. A box body is provided with a buffer cavity, an upper outlet hole, a lower outlet hole, an upperinlet hole and a lower inlet hole, the upper side and lower side of the box body are both provided with an outlet cavity and at least two body cavity groups, and the number of body cavities containedin the body cavity groups from the inlet holes to the outlet holes is decreased respectively in sequence; one body cavity in the body cavity groups is provided with an inlet cavity and an air outlet hole, and other body cavities are only provided with vent holes; the inlet cavity, an outlet cavity and valve plates arranged in the inlet cavity and outlet cavity form an inlet valve and an outlet valve; an upper cover and a bottom plate are arranged at the upper side and lower side of the box body, a piezoelectric actuator is in pressing connection to the interior of each body cavity through a seal ring to form a compression cavity, and the compression cavities in the same body cavity group are connected into a compression cavity group in parallel; the inlet holes, compression cavity groups,outlet cavities and outlet holes in the upper side and lower side of the box body are connected into an upper compression unit and a lower compression unit in series respectively, and the upper compression unit and the lower compression unit are connected in series through the buffer cavity; a bag cavity of the upper cover is internally provided with an air bag and a medicine bag, and the end of the bag cavity is provided with a baffle; the air bag is communicated with the upper outlet hole through an air delivery pipe, and an infusion tube of the medicine bag is provided with a needle and a flow valve.

The invention relates to an injection system driven by a piezoelectric sheet and belongs to the field of medical instruments. A main body is arranged on a base, and an injector is arranged at the endpart of a cylinder cavity of the main body; the bottom of the main body is provided with a left boss, a right boss and at least two body tables with unequal diameters, the left boss is provided with an upper inlet hole, the right boss is provided with an upper outlet cavity communicated with the cylinder cavity through the upper outlet hole, and the body tables are provided with an upper inlet cavity and an upper outlet hole; the top of the base is provided with a left cavity, a right cavity and a body cavity which are respectively equal to the number and the diameter of the body table, the left cavity is provided with a lower inlet hole, the right cavity is provided with a lower outlet cavity, and the body cavity is provided with a lower inlet cavity and a lower outlet hole; the upper andlower inlet and outlet cavities and the valve plates installed in the upper and lower inlet and outlet cavities respectively form upper and lower inlet and outlet valves; the left boss is arranged inthe left cavity, the right boss is arranged in the right cavity, the body platform presses the piezoelectric driver into the body cavity through a sealing ring to form an upper compression cavity anda lower compression cavity, the upper compression cavity is connected in series to form an upper compression unit, the lower compression cavity is connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in parallel; in operation, the deformation directions of the left and right adjacent drivers are opposite.

The invention relates to an infusion device driven by piezoelectric stacks, and belongs to the field of medical apparatuses. A base is provided with outlet and inlet holes, an outlet cavity and at least two sinking cavities with unequal diameters, the diameters of the sinking cavities are gradually reduced from left to right, and inlet cavities and air outlet holes are formed in the bottom walls of the sinking cavities; the inlet and outlet cavities and valves installed in the inlet and outlet cavities form inlet and outlet valves respectively; guide holes which have the same number and diameter as those of the sinking cavities respectively are formed in the bottom of a main device body, the main device body is installed on the base, diaphragms are pressed on the base, and the guide holesand the sinking cavities are symmetrically formed in the two sides of each diaphragm; the piezoelectric stacks in the guide holes press pistons on the diaphragms; the diaphragms press sealing rings inthe sinking cavities to constitute compression cavities which are connected in series; a bag cavity internally provided with an airbag and a medicine bag is formed in the top of the main device body,and a baffle is installed at the end of the side wall of the bag cavity; a liquid outlet tube of the medicine bag is provided with a flow adjusting valve and a syringe needle, an air inlet tube of the airbag is connected with the outlet hole of the base, and a switching valve and a deflating valve are arranged on an air inlet tube of the airbag. During work, the deformation directions of the diaphragms in every two adjacent compression cavities are opposite.

The invention relates to a pneumatic infusion device, and belongs to the field of medical instruments. A box body is provided with a buffer cavity, an upper outlet hole, a lower outlet hole, an upperinlet hole and a lower inlet hole, the upper side and lower side of the box body are both provided with an outlet cavity and at least two body cavity groups, and the number of body cavities containedin the body cavity groups from the inlet holes to the outlet holes is decreased respectively in sequence; one body cavity in the body cavity groups is provided with an inlet cavity and an air outlet hole, and other body cavities are only provided with vent holes; the inlet cavity, an outlet cavity and valve plates arranged in the inlet cavity and outlet cavity form an inlet valve and an outlet valve; an upper cover and a bottom plate are arranged at the upper side and lower side of the box body, a piezoelectric actuator is in pressing connection to the interior of each body cavity through a seal ring to form a compression cavity, and the compression cavities in the same body cavity group are connected into a compression cavity group in parallel; the inlet holes, compression cavity groups,outlet cavities and outlet holes in the upper side and lower side of the box body are connected into an upper compression unit and a lower compression unit in series respectively, and the upper compression unit and the lower compression unit are connected in series through the buffer cavity; a bag cavity of the upper cover is internally provided with an air bag and a medicine bag, and the end of the bag cavity is provided with a baffle; the air bag is communicated with the upper outlet hole through an air delivery pipe, and an infusion tube of the medicine bag is provided with a needle and a flow valve.

The invention relates to a step-by-step pressurized pneumatic infusion device, which belongs to the field of medical equipment. The main body is provided with an upper inlet hole, a boss with an upper outlet cavity and an outlet hole, and at least two round table groups whose number of round tables changes sequentially; one round table in the round table group is provided with an upper inlet mouth and an upper air outlet, and the other round tables are provided. There is an upper ventilation hole; the body cavity is equipped with an infusion bag with an air cavity and a medicine cavity, and the air cavity is connected to the outlet hole; the base is provided with a lower inlet hole, a cavity with a lower outlet mouth, and a body cavity group composed of a body cavity; the body cavity One of the body cavities in the group is provided with a lower inlet and a lower air hole, and the other body cavities are equipped with a lower air hole; the upper and lower inlet and outlet chambers and the valve plates inside constitute the upper and lower inlet and outlet valves; the main body is installed on the base so that the upper and lower outlets and the outlet The holes are connected, and the piezoelectric driver is crimped into the body cavity through the sealing ring to form the upper and lower compression chambers. The upper and lower compression chambers in the same body cavity group are connected in parallel to form the upper and lower compression chamber groups, and the upper and lower compression chamber groups are connected in series to form parallel upper and lower compression chambers. unit.

The invention provides a liquid medicament delivery device, which relates to the field of medical equipment. The device for transporting liquid medicine includes a box body, the upper end of the box body is fixedly connected with a plurality of support seats, the upper ends of the plurality of support seats are provided with drug containers fixedly connected with them, and the middle end of the inner wall of the box body is fixed. A partition plate is connected, the bottom end of the partition plate is provided with a delivery box, and the bottom end of the delivery box is fixedly connected to the bottom plate of the box body, and a rotating rod is arranged at the center of the front and rear walls inside the delivery box. A plurality of rotating leaves are fixedly connected to the body of the rotating rod, and a glass liquid delivery pipe is fixedly connected to the center of the bottom end of the medicine container. Through the use of heating wires and temperature relays, the device can automatically and safely heat the liquid medicine, and through the use of servo motors and delivery boxes, the device can precisely control the delivery speed of the liquid medicine, and at the same time solve the problem of infusion. The problem of having to hang the vial high.

The invention discloses an automatic infusion apparatus which comprises an elastic device, a liquid guide tube connected with one end of the elastic device and a switching valve arranged on the liquid guide tube. The elastic device is provided with a medicine liquid injection port and a medicine liquid outlet, wherein the medicine liquid outlet is connected with one end of the liquid guide tube, and the other end of the liquid guide tube is used for being connected with a needle tube. Due to the fact that medicine liquid is subjected to the effect of a resilience force, the blood backflow situation is not worried, the automatic infusion apparatus is not needed to be hung at a high position, can be hung on a body, put in a pocket or put on a bed and is not needed to be lifted by others, and a patient does not need to sit or lie for a long period of time and can freely move and control the infusion speed through the switching valve. On the one hand, medicine liquid is completely isolated from air and accordingly is prevented from being polluted by bacteria, viruses and dust in the air; on the other hand, the automatic infusion apparatus is convenient to use.

The invention discloses an infusion auxiliary mechanism and control system with a remote control function, and relates to the technical field of hospital department auxiliary tools. The infusion auxiliary mechanism comprises a shell body, a connecting mechanism and an auxiliary system, a placing groove is formed in one side of the shell body, a first connecting lantern ring is fixedly connected toa top part of the shell body, a micro heating pad is fixedly arranged on an upper side of an interior of the placing groove, and the auxiliary system comprises an MCU controller, a receiving module,an output module, a power module, a feedback module and a wireless transmitter. The infusion auxiliary mechanism can conveniently fix an infusion tube, does not affect an infusion speed compared witha traditional fixing mode of clamping the infusion tube, can achieve an infusion remaining amount real-time monitoring and alarming function, can control and monitor an infusion temperature, can alsocontrol the infusion speed, can realize a function of wirelessly transmitting the infusion temperature and an infusion remaining amount real-time wireless delivery to a remote doctor to remotely master an infusion condition at any time, and increases practicability.

The invention relates to an injection system driven by a piezoelectric sheet and belongs to the field of medical instruments. A main body is arranged on a base, and an injector is arranged at the endpart of a cylinder cavity of the main body; the bottom of the main body is provided with a left boss, a right boss and at least two body tables with unequal diameters, the left boss is provided with an upper inlet hole, the right boss is provided with an upper outlet cavity communicated with the cylinder cavity through the upper outlet hole, and the body tables are provided with an upper inlet cavity and an upper outlet hole; the top of the base is provided with a left cavity, a right cavity and a body cavity which are respectively equal to the number and the diameter of the body table, the left cavity is provided with a lower inlet hole, the right cavity is provided with a lower outlet cavity, and the body cavity is provided with a lower inlet cavity and a lower outlet hole; the upper andlower inlet and outlet cavities and the valve plates installed in the upper and lower inlet and outlet cavities respectively form upper and lower inlet and outlet valves; the left boss is arranged inthe left cavity, the right boss is arranged in the right cavity, the body platform presses the piezoelectric driver into the body cavity through a sealing ring to form an upper compression cavity anda lower compression cavity, the upper compression cavity is connected in series to form an upper compression unit, the lower compression cavity is connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in parallel; in operation, the deformation directions of the left and right adjacent drivers are opposite.

The invention relates to an inflatable extrusion type transfusion device, which belongs to the field of medical equipment. The main body is provided with an upper inlet hole, a boss with an upper outlet cavity, and at least two round table groups whose number of round tables decreases in turn from left to right; the main body cavity is equipped with an air bag and a medicine bag, and the medicine bag infusion tube is equipped with a needle and a flow valve; the base is provided with a lower inlet hole, a cavity with a lower outlet cavity, an air storage chamber connected with the lower outlet cavity, and a body cavity group composed of a body cavity; the upper and lower inlet and outlet chambers and the valve plate constitute the upper and lower inlet and outlet valves; the main body is installed On the base, the boss crimps the partition in the cavity, and the round table crimps the piezoelectric driver in the body cavity through the sealing ring and forms the upper and lower compression chambers with the main body and the base respectively. The upper and lower compression chambers in the same body cavity group are connected in parallel. The upper and lower compression chamber groups are connected in series to form upper and lower compression units connected in parallel; the upper inlet and outlet holes are respectively connected to the gas storage chamber through parallel and series valves, the upper inlet hole is equipped with an inlet valve, and the upper outlet hole is connected through an output valve It communicates with the air bag with deflation valve.

The invention relates to a piezoelectric-driven transfusion device, which belongs to the field of medical equipment. The seat plate of the main body is provided with a cavity, and a medicine bag with a medicine cavity and an air cavity is installed in the cavity; the bottom of the seat plate is provided with left and right bosses and at least two body platforms whose diameters decrease successively from left to right, and on the left boss There is an upper inlet hole, an upper outlet cavity and an upper outlet hole are arranged on the right boss, an upper inlet cavity and an upper air outlet are arranged on the body platform; left and right cavities and body cavities equal in number and diameter to the body platform are respectively arranged on the base, The bottom wall of the left cavity is provided with a lower inlet hole, the bottom wall of the right cavity is provided with a lower outlet cavity, and the bottom wall of the body cavity is provided with a lower inlet cavity and a lower air outlet; The plate is mounted on the base and the upper and lower inlet holes are connected, the upper and lower outlet openings are connected with the upper outlet hole, the body platform presses the piezoelectric driver in the body cavity through the sealing ring to form the upper and lower compression chambers, and the upper and lower compression chambers connected in series are connected in parallel; the air chamber It communicates with the upper outlet hole through the air pipe, and the infusion pipe of the medicine cavity is equipped with a flow valve and a needle.

The invention belongs to the technical field of transfusion, and relates to a transfusion system capable of conveniently and accurately monitoring the transfusion flow. The transfusion system includes a liquid drug container, a transfusion pipe and a flow monitoring device, wherein the liquid drug container is used for containing liquid drugs and is connected with the transfusion pipe, and the flow monitoring device is arranged on the transfusion pipe and used for monitoring the transfusion flow; the other end of the transfusion pipe is connected with vein vessels of a patient, so that the liquid drugs can flow into the vein vessels of the patient; the flow monitoring device includes a housing, a liquid drug inlet, a valve element, an elastic part and a liquid drug outlet, wherein the liquid drug inlet, the valve element, the elastic part and the liquid drug outlet are sequentially arranged in the flowing direction of the liquid drugs in the housing; a gap is formed between the valve element and the housing and / or an opening is formed in the middle of the valve element, so that the liquid drugs can flow through the flow monitoring device. By means of the transfusion system capable of conveniently and accurately monitoring the transfusion flow, time, labor and worry are saved, and the transfusion flow in the transfusion process of the patient is accurately monitored.

The invention relates to a step-by-step pressurized pneumatic infusion device, which belongs to the field of medical equipment. The box body is provided with a buffer cavity and upper and lower inlet and outlet holes, the upper and lower sides of the box body are provided with an outlet cavity and at least two body cavities whose diameters decrease in sequence from the inlet hole to the outlet hole, and the body cavity is provided with an inlet cavity and an air outlet; The inlet and outlet chambers and the valve plates in them constitute the inlet and outlet valves respectively; the upper cover and the bottom plate are installed on the upper and lower sides of the box body, and the piezoelectric driver is crimped in each body cavity through the sealing ring to form a compression chamber; the upper inlet hole on the top of the box body, The compression chambers and outlet chambers are connected in series to form an upper compression unit, the lower inlet holes, compression chambers, outlet chambers and lower outlet holes at the bottom of the box are connected in series to form a lower compression unit, and the upper and lower compression units are connected in series through the buffer chamber; during operation, the upper and lower compression units are connected in series. The deformation directions of the two left and right adjacent drivers in the middle are opposite; the bladder cavity of the upper cover is equipped with an infusion bag with an air cavity and a medicine cavity, and the infusion tube of the medicine cavity is provided with a needle and a flow valve. Outlet connection.