CN2642338Y - Oxygen supply valve according to need for air controlled respirator - Google Patents

Abstract

An oxygen supply valve according to the needs for an air control breathing apparatus includes a valve body; the valve cavity is orderly provided with an upper air chamber, a middle air chamber and a lower air chamber; the lower air chamber is connected with an oxygen feeding pipe and an oxygen discharging pipe; the upper air chamber is communicated with the negative pressure inlet pipeline; the upper air chamber and the middle air chamber are respectively provided with a pressure membrane piece and are communicated with the control signal pipeline; with the change of the pressure, the upper air chamber and the middle air chamber drives the movement of the switch of the oxygen discharging pipe; the lower part of the valve body is provided with a control signal inlet communicated with the throttle; the outlet of the throttle is connected with the control signal pipeline; the regulation of the throttle rod can change the control signal flow to adjust the sensitivity of the switch; the pressure membrane piece on the upper air chamber is fixed with a pressure spring; the regulation rod adjusts the spring force to change the lowest starting pressure of the valve; the utility model is simple in structure and small in size; the device can be used as a special valve in a medical breathing apparatus, in particular in the high-pressure oxygen cabin; the utility model can conveniently realize the free change of the oxygen supply quantity according to the needs of the oxygen breathing person.

Description

The gas control used for respirators is oxygen supply valve as required

Technical field

This utility model relates to the technical field of medical instruments that influences the patient respiration system with gas treating process, the special valve in specifically a kind of medical respiration device.

Background technology

The at present domestic gas of controlling in the gas control respirator that uses produces the mobile apparatus structure complexity of pulse (intermittently), the quantity delivered control of oxygen can not change at any time by the needs of oxygen therapic patient, as China's utility model patent " the integrated actuator of pneumatic respirator " (patent No.: 98206435.7), it realizes intermittent oxygen supply with parts such as rubber vibration film and rubber oriented film, the air leakage amount control on the adjusting tube road of frequency, oxygen supply time in each discontinuous operation adds adjusting by one " time regulator ", is difficult to realize oxygen supply as required.

Summary of the invention

The purpose of this utility model provide a kind of simple in structure, volume is small and exquisite, can realize gas control used for respirators that needs by oxygen therapic patient change the oxygen quantity delivered at any time oxygen supply valve as required easily.

The technical solution of the utility model is such: a kind of gas control used for respirators is oxygen supply valve as required, and a valve body is arranged, and is disposed with upper chamber, middle air chamber, lower chamber in valve pocket; Be connected to oxygen feeding tube that connects source of oxygen and the oxygen output pipe of supplying with oxygen on lower chamber, the junction of oxygen feeding tube and lower chamber is provided with the lower seal mouth, and the commutation piece of a leukorrhagia sealing gasket is arranged on the lower seal mouth, and the commutation piece is connected with push rod; Be provided with pressure-sensitive diaphragm in middle air chamber, this pressure-sensitive diaphragm is connected with above-mentioned push rod, communicates with the control signal pipeline on the pressure-sensitive diaphragm top of middle air chamber, and the bottom connects an air vent; In upper chamber, also be provided with pressure-sensitive diaphragm, below this pressure-sensitive diaphragm, be fixed with sealing gasket, last sealing gasket places on the last seal of control signal pipeline, on pressure-sensitive diaphragm, fix a compression spring, the compression spring upper end is fixed by movable block, is connected with adjusting rod on the movable block, pressure-sensitive diaphragm top at upper chamber communicates with the negative pressure inlet ductwork, and the bottom connects an air vent; In valve body lower portion the control signal import is set, is connected with the intravital choke valve of valve, choke valve outlet connection control signal pipeline, throttle valve lever places the valve body bottom.

Work process of the present utility model is such: when the oxygen of source of the gas input 200Kpa pressure, simultaneously at control signal mouth input 15-20Kpa pressure; When the negative pressure import does not have negative pressure, last sealing gasket is under the effect of compression spring, to go up the seal shutoff, middle air chamber forms negative pressure cavity rapidly, under this pressure effect, the pressure-sensitive diaphragm of middle air chamber produces downward active force, the commutation piece that drives push rod and link to each other, lower seal pad on the commutation piece is with the shutoff of lower seal mouth, and this moment, the oxygen output pipe no oxygen was exported; When negative pressure import input negative pressure, upper chamber becomes negative pressure cavity, during greater than the operating pressure of compression spring, the pressure-sensitive diaphragm of upper chamber drives to go up on the sealing gasket and moves, last seal unlatching in suction function power, the air chamber internal gas pressure is discharged from air vent in making, middle air chamber pressure descends, and the downward active force of pressure-sensitive diaphragm reduces, and lower seal pad, push rod upwards move under the oxygen pressure effect that oxygen feeding tube enters, the lower seal mouth is opened, and oxygen is exported through oxygen exhaust.Because of the size of output oxygen flow, be decided by the unlatching size of lower seal mouth, when the input negative pressure is high, last seal is opened just big, and middle air chamber pressure is just low, act on pressure-sensitive diaphragm power just little, the lower seal mouth is opened just big, and the output oxygen flow is just big, otherwise just little; And the input of the negative pressure pressure of inspiration(Pi) of oxygen therapic patient just, oxygen therapic patient air-breathing big more promptly needs oxygen many more, and the oxygen flow of supply is also big more; When stopping suction or exhale, the output of valve is also just closed.The minimum opening pressure of valve that is to say the minimum pressure that can trigger output oxygen, and rotatable adjusting rod is realized; The sensitivity of threshold switch can change the control signal flow and realize by regulating throttling rod.

Because this utility model has adopted technique scheme, make simple in structure, volume is small and exquisite, no consumable accessory, cost are low, reliable operation, need not keep in repair, special valve as the medical respiration device, especially in hyperbaric oxygen chamber, use, can realize easily changing the oxygen quantity delivered at any time by the needs of oxygen therapic patient.

Description of drawings

Below in conjunction with drawings and Examples this utility model is further described.

Accompanying drawing is a structural representation of the present utility model.

Among the figure: 1, adjusting rod, 2, compression spring, 3, upper chamber, 4, pressure-sensitive diaphragm, 5, go up sealing gasket, 6, the negative pressure import, 7, air vent, 8, go up seal, 9, middle air chamber, 10, pressure-sensitive diaphragm, 11, push rod, 12, the lower seal pad, 13, the commutation piece, 14, control signal import, 15, oxygen output pipe, 16, throttling rod, 17, lower seal mouth, 18, oxygen feeding tube, 19, movable block.

The specific embodiment

Most preferred embodiment:

Shown in accompanying drawing, a kind of gas control used for respirators of the present utility model is oxygen supply valve as required, one valve body is arranged, in valve body, be disposed with upper chamber (3), middle air chamber (9) and lower chamber, it is characterized in that: be connected to oxygen feeding tube (18) that connects source of oxygen and the oxygen output pipe (15) of supplying with oxygen on lower chamber, the junction of oxygen feeding tube and lower chamber is provided with lower seal mouth (17), the commutation piece (13) that one leukorrhagia sealing gasket (12) is arranged on the lower seal mouth, the commutation piece is connected with push rod (11); Be provided with pressure-sensitive diaphragm (10) in middle air chamber (9), this pressure-sensitive diaphragm is connected with above-mentioned push rod (11), communicates with the control signal pipeline on pressure-sensitive diaphragm (10) top of middle air chamber, and the bottom connects an air vent; In upper chamber (3), also be provided with pressure-sensitive diaphragm (4), below this pressure-sensitive diaphragm, be fixed with sealing gasket (5), last sealing gasket places on the last seal (8) of control signal pipeline, on pressure-sensitive diaphragm (4), fix a compression spring (2), the compression spring upper end is fixing by movable block (19), is connected with adjusting rod (1) on the movable block, pressure-sensitive diaphragm (4) top at upper chamber communicates with negative pressure import (6) pipeline, and the bottom connects an air vent (7); In valve body lower portion control signal import (14) is set, is connected with the intravital choke valve of valve, choke valve outlet connection control signal pipeline, throttle valve lever (16) places the valve body bottom.

Claims (1)

1, a kind of gas control used for respirators oxygen supply valve as required, one valve body is arranged, in valve pocket, be disposed with upper chamber (3), middle air chamber (9) and lower chamber, it is characterized in that: on lower chamber, be connected to oxygen feeding tube (18) that connects source of oxygen and the oxygen output pipe (15) of supplying with oxygen, the junction of oxygen feeding tube and lower chamber, lower seal mouth (17) is set, the commutation piece (13) of a leukorrhagia sealing gasket (12) is arranged on the lower seal mouth, the commutation piece is connected with push rod (11); Be provided with pressure-sensitive diaphragm (10) in middle air chamber (9), this pressure-sensitive diaphragm is connected with above-mentioned push rod (11), communicates with the control signal pipeline on pressure-sensitive diaphragm (10) top of middle air chamber, and the bottom connects an air vent; In upper chamber (3), also be provided with pressure-sensitive diaphragm (4), below this pressure-sensitive diaphragm, be fixed with sealing gasket (5), last sealing gasket places on the last seal (8) of control signal pipeline, on pressure-sensitive diaphragm (4), fix a compression spring (2), the compression spring upper end is fixing by movable block (19), is connected with adjusting rod (1) on the movable block, pressure-sensitive diaphragm (4) top at upper chamber communicates with negative pressure import (6) pipeline, and the bottom connects an air vent (7); In valve body lower portion control signal import (14) is set, is connected with the intravital choke valve of valve, choke valve outlet connection control signal pipeline, throttle valve lever (16) places the valve body bottom.

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