CN105443906B - Medical gas terminal and metering method for flow rate of gas in medical gas channel - Google Patents
Medical gas terminal and metering method for flow rate of gas in medical gas channel Download PDFInfo
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- CN105443906B CN105443906B CN201511005398.9A CN201511005398A CN105443906B CN 105443906 B CN105443906 B CN 105443906B CN 201511005398 A CN201511005398 A CN 201511005398A CN 105443906 B CN105443906 B CN 105443906B
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- gas
- pressure
- valve element
- medical
- medical gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/38—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings
- F16L37/40—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in only one of the two pipe-end fittings with a lift valve being opened automatically when the coupling is applied
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a medical gas terminal and a metering method for flow rate of gas in a medical gas channel. The medical gas terminal comprises a valve element coat, a base, a pressure sensor, a valve element spring and a valve element, wherein a first pressure detecting gas channel and a second pressure detecting gas channel are arranged on the base; a first pressure detector and a second pressure detector are arranged on the pressure sensor; the valve element is movably sleeved with the valve element coat; the valve element spring is mounted between the valve element and the base; the first pressure detector and the second pressure detector correspondingly communicate with the first pressure detecting gas channel and the second pressure detecting gas channel. The metering method for the flow rate of the gas in the medical gas channel comprises the following steps: calculating the pressure coefficients; detecting the pressure of the gas in the first pressure detecting gas channel and the second pressure detecting gas channel; then calculating the flow rate of the gas according to a fluid material mechanics property formula. The method is convenient and quick in operation, and can greatly reduce the cost of measuring the flow rate of the gas in the medical gas channel.
Description
Technical field
The present invention relates to gas pressure alarm and flow measurement device technical field, more particularly, in medical gas pipeline
The metering method that gas pressure is alarmed with gas flow in a kind of Medical gas terminal and medical gas circuit of flow measurement.
Background technology
Gas pressure in medical gas pipeline is generally higher, and by taking medical oxygen system as an example, national standard requirement is eventually
End pressure must not be less than 0.4MPa, therefore, the monitoring to the gas pressure in medical gas pipeline (referred to as " gas circuit ", similarly hereinafter),
Just it is particularly important, the measurement of gas flow to each region is similarly important.But, in existing Medical gas terminal component
In, the gas flow measured using conventional metered dose mode in medical gas circuit is more complicated, and enforcement difficulty is higher, metering, monitoring
Also it is very inconvenient, cause the measurement cost to the gas flow in medical gas circuit higher.
The content of the invention
The technical problem to be solved in the present invention is：For the problem that prior art is present, there is provided a kind of Medical gas terminal
And in medical gas circuit gas flow metering method, reduce the measurement cost of the gas flow in medical gas circuit.
The technical problem to be solved in the present invention is realized using following technical scheme：A kind of Medical gas terminal, including valve
Core overcoat, base, pressure sensor and valve core spring and valve element, set the first pressure detection gas being mutually communicated on base
Body passage and second pressure detection gas passage, set first pressure probe and second pressure probe on the pressure sensor,
The valve element and valve element overcoat pivot bush unit, the valve core spring are arranged between valve element and base, the first pressure probe,
Second pressure probe is communicated with first pressure detection gas passage, second pressure detection gas passage respectively；When valve element relative to
When valve element overcoat is moved downward and compresses valve core spring to certain position, the passage on valve element detects gas with first pressure
Connected between body passage.
Preferably, also including valve element position-limit mechanism, the valve element position-limit mechanism includes valve seat and gland, the valve seat, pressure
Set inner chamber is ladder-type structure, and the valve seat is connected with base, and the gland is socketed in valve base cavity, the valve element
Overcoat is socketed in gland inner chamber.
Preferably, also including bayonet lock and its fixed mechanism, the fixed mechanism of the bayonet lock includes sliding sleeve and gland spring,
U-lag is set, and be fixed on bayonet lock in the U-lag on valve seat by the sliding sleeve, the gland spring is lived with valve seat on the valve seat
Dynamic socket, and positioned at sliding sleeve lower section.
Preferably, locating slot is set in described gland inner chamber, the first sealing ring is installed in locating slot.
Preferably, packing ring is set in described gland inner chamber, and the packing ring is located between the first sealing ring and valve element overcoat.
Preferably, also including the connecting plate being fixedly connected with base, mounting hole and connection through hole, institute are opened up on connecting plate
First pressure probe, second pressure probe is stated to be connected by connecting through hole and connecting plate respectively.
Preferably, also including warning device, electrically connected between the warning device and pressure sensor.
Preferably, the second sealing ring is set between described valve element overcoat and base.
Preferably, the 3rd sealing ring is set between described valve element overcoat and valve element.
The metering method of gas flow, is carried out using Medical gas terminal as described above in a kind of medical gas circuit, including
Following steps：
First, using known gas flow Q to gas is passed through in the Medical gas terminal, difference in gas circuit is measured
The gas pressure of position, is designated as P respectively1、P2, wherein, P2＞ P1；
Then, according to flowing material mechanical characteristic formula：P2-P1=cQ2, calculate pressure coefficient c therein；
Next, during described Medical gas terminal accessed into medical gas circuit, and make on Medical gas terminal first to press
Power detection gas passage connects medical gas circuit, to being passed through gas to be measured in Medical gas terminal；
Finally, valve element is opened, gas to be measured is flowed through valve element, popped one's head in by first pressure probe, second pressure and divided
Not Jian Ce first pressure detection gas passage, second pressure detection gas passage in gas pressure, P is designated as respectively1、P2, its
In, P2＞ P1, by P1、P2, c substitute into flowing material mechanical characteristic formula, calculate gas flow Q.
Compared with prior art, the beneficial effects of the invention are as follows：In the measurement of gas flow in carrying out medical gas circuit, only
Need to be connected medical gas circuit with first pressure detection gas passage and communicate, the pipeline connect-disconnect plug insertion valve seat of gas equipment is simultaneously pushed away
Movable valve plug is moved downward relative to valve element overcoat, and the gas in medical gas circuit is entered into gas equipment through valve element, and valve element is downward
Connected between the passage being moved on valve element and first pressure detection gas passage；In gas flow, by first
Pressure probe, second pressure probe can respectively measure first pressure detection gas passage, second pressure detection gas passage
In gas static pressure, gas flow in medical gas circuit, operation then can be calculated according to flowing material mechanical characteristic formula
Convenient, fast, reliable operation significantly reduces the measurement cost of the gas flow in medical gas circuit.
Brief description of the drawings
Fig. 1 is a kind of structural map (front view) of Medical gas terminal of the invention.
Fig. 2 is a kind of structural map (top view) of Medical gas terminal of the invention.
Component token name claims in figure：1- positioning sleeves, 2- glands, 3- trim rings, 4- bayonet locks, 5- sliding sleeves, 6- valve seats, 7- first is close
Seal, 8- glands, 9- packing rings, 10- valve element overcoats, 11- bases, 12- second pressures detection gas passage, 13- second pressures are visited
Head, 14- connecting plates, 15- pressure sensors, 16- first pressures detection gas passage, 17- first pressures probe, 18- valve element bullets
Spring, 19- air storing cavities, the sealing rings of 20- second, the sealing rings of 21- the 3rd, 22- passages, 23- valve elements, 24- gland springs, 25- peaces
Dress hole.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and specific implementation
The present invention is described in detail for example.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
A kind of Medical gas terminal as shown in Figure 1 and Figure 2, mainly includes valve element overcoat 10, base 11, pressure sensor
15 and valve core spring 18 and valve element 23, be provided with the base 11 be mutually communicated first pressure detection gas passage 16,
Air storing cavity 19 and second pressure detection gas passage 12, first pressure detection gas passage 16, the second pressure detection gas
The central axis of passage 12 is mutually perpendicular to；The connecting plate 14 of circular configuration is fixedly connected with the bottom of base 11, in connecting plate 14
On open up mounting hole 25 and two connection through holes, described two connection through holes respectively with first pressure detection gas passage 16, the
Two pressure detecting gas passages 12 are communicated.First pressure probe 17 and second pressure probe are set on described pressure sensor 15
13, described first pressure probe 17, second pressure probe 13 is connected through holes and is connected by two on connecting plate 14 respectively
Plate 14 is connected, also, first pressure probe 17, second pressure probe 13 detects gas passage with first pressure respectively
16th, second pressure detection gas passage 12 is communicated.Valve core spring 18, the valve element bullet are set in air storing cavity 19 on the pedestal 11
The top of spring 18 is connected with the bottom of valve element 23, and the bottom of valve core spring 18 contacts with the base plane of air storing cavity 19.The valve element 23 is open
End through valve element overcoat 10 and with the pivot bush unit of valve element overcoat 10, passage 22 is opened up on valve element 23.
As shown in figure 1, being sealedly and fixedly connected between the top of the base 11 and the bottom of valve seat 6, the inner chamber of the valve seat 6 is rank
Trapezium structure, in the intracavity bottom pivot bush unit gland 8 of valve seat 6, valve element position-limit mechanism is constituted by valve seat 6 and gland 8.In valve seat
6 inner cavity tops are fixedly connected with positioning sleeve 1, the outside of the positioning sleeve 1 socket gland 2, set between gland 2 and valve seat 6 with
The trim ring 3 that gland 2 is connected with each other.The inner chamber of the gland 8 is also ladder-type structure, and the intracavity bottom of gland 8 and valve element overcoat 10
Mutually socket, described valve element overcoat 10 is socketed in the hollow cavity top of base 11, the bottom of the gland 8 simultaneously with base 11
Hollow cavity at the top of port of export pivot bush unit.U-lag is set on valve seat 6, bayonet lock 4 is fixed on by the U-shaped by sliding sleeve 5
In groove, gland spring 24 and the pivot bush unit of valve seat 6, and positioned at the lower section of sliding sleeve 5, the sliding sleeve 5 and gland spring 24 constitute card
The fixed mechanism of pin 4.When valve element 23 is moved downward relative to valve element overcoat 10 and compresses valve core spring 18 to certain position, position
Will be interconnected between first pressure detection gas passage 16 in the passage 22 on valve element 23.
The measurement of gas flow that the Medical gas terminal of said structure can be used in medical gas circuit, its specifically used method
It is：Medical gas terminal is fixed on specified location by the mounting hole 25 on connecting plate 14 first, in medical gas circuit is carried out
The measurement of gas flow when, then by base 11 first pressure detection gas passage 16 be directly connected to medical oxygen supply system pipe
Road, the pipeline connect-disconnect plug of gas equipment is inserted from the entrance on the top of positioning sleeve 1, and is entered in the inner chamber of gland 8 through bayonet lock 4, directly
Gas circuit connection is communicated to promoting valve element 23 to move down.
In order to prevent the insertion maloperation of the pipeline connect-disconnect plug of gas equipment, can by the entrance on the top of positioning sleeve 1 according to
Gas with various species is designed to different structures, and such as oxygen is hexagonal structure, as shown in Figure 2.
Sealing after being inserted for the pipeline connect-disconnect plug for ensureing gas equipment, can set positioning in the inner chamber of gland 8
Groove, and the first sealing ring 7 is installed in locating slot, as shown in Figure 1.In order to ensure the sealing between gland 8 and valve element overcoat 10
Property, packing ring 9 is set in the inner chamber of gland 8, as shown in Figure 1.The packing ring 9 uses elastic caoutchouc packing ring, to ensure gland 8
With the sealing property between set 10 at valve element.
Generally, the valve element 23 passes through to be protected between the 3rd sealing ring 21 and valve element overcoat 10 in the presence of valve core spring 18
Sealing is held, meanwhile, the second sealing ring 20 is set between valve element overcoat 10 and base 11, as shown in Figure 1.It is not downward in valve element 23
When mobile, the gas in first pressure detection gas passage 16, air storing cavity 19 and second pressure detection gas passage 12 is equal
Remain static, therefore, the gas static pressure at 13 liang of first pressure probe 17, the second pressure probe is equal.When with
When the pipeline connect-disconnect plug of gas equipment is moved downward and promotes valve element 23 to move down, valve element 23 compresses valve core spring 18, now gas
Body flows to gas equipment by valve element 23.When between the passage 22 on valve element 23 and first pressure detection gas passage 16
During connection, the gas to be measured in Medical gas terminal is in flow regime, i.e., the gas to be measured in medical gas circuit
Valve element 23 can be flowed through to enter into gas equipment pipeline.In gas flow, pressed by first pressure probe 17, second
Power probe 13 can respectively detect the gas pressure in first pressure detection gas passage 16, second pressure detection gas passage 12
Power, is designated as P respectively1、P2, after the device such as the pressure sensor 15 and computer, PLC, single-chip microcomputer is electrically connected, you can directly to read
Go out the P1、P2Real-time detection concrete numerical value.
According to flowing material mechanical characteristic formula：
P2-P1=cQ2。
In above-mentioned formula, c is pressure coefficient, and this body structure is relevant with Medical gas terminal for its occurrence, and Q is in gas circuit
Gas flow.For specific Medical gas terminal, medical gas first can be passed through using known, standard gas flow Q
Terminal, measures the P of the diverse location in gas circuit1、P2Afterwards, wherein, P2＞ P1, after substituting into above-mentioned formula, you can calculate c values.By
Knowable to this, the square of the gas flow Q in the pressure differential of the diverse location in the gas circuit and the gas circuit, therefore,
The occurrence of the gas flow Q in the gas circuit, operation side can be obtained by the pressure differential for measuring the diverse location in the gas circuit
Just, fast, metric results reliability, significantly reduces the measurement cost of the gas flow in medical gas circuit.
Gas pressure in order to further facilitate, effectively to flowing through Medical gas terminal is monitored, and prevents gas from surpassing
Press or caused damage when under-voltage, can set electrically connected between warning device and pressure sensor 15；Described warning device can
Being voice guard, or photoelectric alarm.When the gas superpressure by Medical gas terminal or it is under-voltage when, it is described
Warning device can send corresponding alarm signal.It should be noted that described warning device can be directly integrated in pressure
On sensor 15, the volume of Medical gas terminal can be reduced, and the functional reliability of Medical gas terminal can be improved.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is noted that be all
Any modification, equivalent and improvement for being made within the spirit and principles in the present invention etc., should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of Medical gas terminal, it is characterised in that：Including valve element overcoat (10), base (11), pressure sensor (15) with
And valve core spring (18) and valve element (23), set on base (11) first pressure that is mutually communicated detect gas passage (16),
Air storing cavity（19）Gas passage (12) is detected with second pressure, first pressure probe (17) is set on the pressure sensor (15)
With second pressure probe (13), the valve element (23) and valve element overcoat (10) pivot bush unit, the valve core spring (18) is arranged on
Between valve element (23) and base (11), in base（11）On air storing cavity（19）Middle setting valve core spring（18）, the valve element bullet
Spring（18）Top and valve element（23）Bottom connects, valve core spring（18）Bottom and air storing cavity（19）Base plane is contacted, and described the
One pressure probe (17), second pressure probe (13) detect gas passage (16), second pressure detection gas with first pressure respectively
Body passage (12) is communicated；When valve element (23) is moved downward relative to valve element overcoat (10) and compresses valve core spring (18) a to positioning
When putting, the passage (22) on valve element (23) is connected between detecting gas passage (16) with first pressure.
2. a kind of Medical gas terminal according to claim 1, it is characterised in that：Also include valve element position-limit mechanism, it is described
Valve element position-limit mechanism includes valve seat (6) and gland (8), and the valve seat (6), gland (8) inner chamber are ladder-type structure, the valve
Seat (6) is connected with base (11), and the gland (8) is socketed in valve seat (6) inner chamber, and the valve element overcoat (10) is socketed in
In gland (8) inner chamber.
3. a kind of Medical gas terminal according to claim 2, it is characterised in that：Also include bayonet lock (4) and its fixed machine
Structure, the fixed mechanism of the bayonet lock (4) includes sliding sleeve (5) and gland spring (24), sets U-lag on the valve seat (6), institute
State sliding sleeve (5) bayonet lock (4) is fixed in the U-lag on valve seat (6), the gland spring (24) and valve seat (6) pivot bush unit,
And positioned at sliding sleeve (5) lower section.
4. a kind of Medical gas terminal according to claim 2 or 3, it is characterised in that：In described gland (8) inner chamber
Locating slot is set, the first sealing ring (7) is installed in locating slot.
5. a kind of Medical gas terminal according to claim 4, it is characterised in that：Set in described gland (8) inner chamber
Packing ring (9), the packing ring (9) is between the first sealing ring (7) and valve element overcoat (10).
6. a kind of Medical gas terminal according to claim any one of 1-3, it is characterised in that：Also include and base (11)
The connecting plate (14) being fixedly connected, opens up mounting hole (25) and connection through hole, the first pressure probe on connecting plate (14)
(17), second pressure probe (13) is connected by connecting through hole and connecting plate (14) respectively.
7. a kind of Medical gas terminal according to claim any one of 1-3, it is characterised in that：Also include warning device,
Electrically connected between the warning device and pressure sensor (15).
8. a kind of Medical gas terminal according to claim any one of 1-3, it is characterised in that：Described valve element overcoat
(10) the second sealing ring (20) is set and base (11) between.
9. a kind of Medical gas terminal according to claim any one of 1-3, it is characterised in that：Described valve element overcoat
(10) the 3rd sealing ring (21) is set and valve element (23) between.
10. in a kind of medical gas circuit gas flow metering method, it is characterised in that：Using the doctor as described in claim 1-9
Carried out with gas end, comprised the following steps：
First, diverse location in gas circuit is measured to gas is passed through in the Medical gas terminal using known gas flow Q
Gas pressure, P1, P2 are designated as respectively, wherein, P2 ＞ P1；
Then, according to flowing material mechanical characteristic formula：P2-P1=cQ2, calculate pressure coefficient c therein；
Next, during described Medical gas terminal accessed into medical gas circuit, and examine the first pressure on Medical gas terminal
Survey gas passage (16) and connect medical gas circuit, to being passed through gas to be measured in Medical gas terminal；
Finally, valve element (23) is opened, gas to be measured is flowed through valve element (23), by first pressure probe (17), the second pressure
Power probe (13) detects the gas pressure in first pressure detection gas passage (16), second pressure detection gas passage (12) respectively
Power, is designated as P1, P2 respectively, wherein, P1, P2, c are substituted into flowing material mechanical characteristic formula by P2 ＞ P1, calculate gas flow
Q。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005398.9A CN105443906B (en) | 2015-12-29 | 2015-12-29 | Medical gas terminal and metering method for flow rate of gas in medical gas channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005398.9A CN105443906B (en) | 2015-12-29 | 2015-12-29 | Medical gas terminal and metering method for flow rate of gas in medical gas channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105443906A CN105443906A (en) | 2016-03-30 |
| CN105443906B true CN105443906B (en) | 2017-05-24 |
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| CN201511005398.9A Active CN105443906B (en) | 2015-12-29 | 2015-12-29 | Medical gas terminal and metering method for flow rate of gas in medical gas channel |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678443B (en) * | 2016-11-25 | 2023-07-21 | 北京卅伯曼科技有限公司 | Split medical gas terminal |
| CN115645691B (en) * | 2022-12-08 | 2023-03-10 | 四川港通医疗设备集团股份有限公司 | Oxygenerator with flow automatic control device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3517070B2 (en) * | 1997-01-16 | 2004-04-05 | 東京瓦斯株式会社 | Flow meter utilizing differential pressure |
| US6914531B1 (en) * | 1998-06-17 | 2005-07-05 | Richard Young | Apparatus for flow detection, measurement and control and method for use of same |
| CN2684161Y (en) * | 2003-09-17 | 2005-03-09 | 张睐 | Medical oxygen flow gauge |
| KR101028213B1 (en) * | 2007-12-27 | 2011-04-11 | 가부시키가이샤 호리바 에스텍 | Flow rate control device |
| JP5833475B2 (en) * | 2012-03-02 | 2015-12-16 | アズビル株式会社 | Gas flow measuring device and flow control valve |
| CN204114272U (en) * | 2014-08-11 | 2015-01-21 | 赵天贤 | Pneumatic oxygen economizer and assisted breathing system |
| CN105156753A (en) * | 2015-08-24 | 2015-12-16 | 重庆瑞力比燃气设备有限责任公司 | Gas pressure detecting device |
| CN205244703U (en) * | 2015-12-29 | 2016-05-18 | 四川港通医疗设备集团股份有限公司 | Medical gas terminal |
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2015
- 2015-12-29 CN CN201511005398.9A patent/CN105443906B/en active Active
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Address after: No.356, south section of kailiwei Industrial Avenue, Jianyang City, Chengdu City, Sichuan Province Patentee after: SICHUAN GANGTONG MEDICAL EQUIPMENT GROUP Co.,Ltd. Address before: 641400 Ziyang city of Sichuan Province, Jianyang city Kailiwei Industrial Avenue South No. 11 Patentee before: SICHUAN GANGTONG MEDICAL EQUIPMENT GROUP Co.,Ltd. |
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Denomination of invention: A measurement method of gas flow in medical gas terminal and medical gas circuit Effective date of registration: 20200806 Granted publication date: 20170524 Pledgee: China Minsheng Banking Corp Chengdu branch Pledgor: SICHUAN GANGTONG MEDICAL EQUIPMENT GROUP Co.,Ltd. Registration number: Y2020510000081 |